CN219865841U - Pin shaft self-locking structure, locking device of electric heavy truck and electric heavy truck - Google Patents

Abstract

The utility model discloses a pin shaft self-locking structure which comprises a pin shaft, a round nut component and a bolt, wherein the pin shaft comprises a first end and a second end which are opposite, the first end and the second end are exposed out of an ear seat, the first end is provided with a pin shaft cap, the pin shaft cap is used for being abutted against one side of the ear seat, the exposed part of the second end is provided with external threads, the round nut component is sleeved on the exposed part and meshed with the external threads, the round nut component is abutted against the other side of the ear seat, the end face of the second end is provided with a threaded hole which is sunken towards the first end along the axial direction of the pin shaft, the bolt penetrates through the threaded hole and is meshed with the threaded hole, and the bolt is abutted against the round nut component, wherein the pitch of the external threads is larger than that of the bolt. The pin shaft self-locking structure effectively prevents the loosening of the pin shaft and improves the connection stability of the air cylinder and the ear seat through double-layer self locking of the round nut component and the bolt.

Description

Pin shaft self-locking structure, locking device of electric heavy truck and electric heavy truck

Technical Field

The utility model relates to the technical field of vehicles, in particular to a pin shaft self-locking structure, a locking device of an electric heavy truck and the electric heavy truck.

Background

In recent years, new energy electric vehicles have been rapidly developed. The battery box is used as an important component of the power conversion system, and the installation reliability of the battery box directly influences the stability and the safety of the whole vehicle. The battery box of current electronic heavy card is connected with the base of vehicle through locking device, and locking device of electronic heavy card includes cylinder and ear seat, and the two rotates to be connected, and wherein, the cylinder mainly is used for providing locking force for locking device.

In the related art, the air cylinder is usually connected with the ear seat through a bolt in a matched manner, so that the air cylinder can be rotationally connected with the ear seat, but in long-term use, due to vehicle vibration, the pin shaft can rotate or axially float, so that the pin shaft is loosened or broken, and the locking of the battery box and the vehicle base is affected.

Disclosure of Invention

The utility model aims to provide a locking device of an electric heavy truck with a pin shaft self-locking structure and the electric heavy truck, which at least solve one of the problems that a pin shaft is easy to loosen or break and the locking of a battery box and a vehicle base is influenced in the related art.

In order to solve the technical problems, the utility model is realized as follows:

in a first aspect, an embodiment of the present utility model provides a pin shaft self-locking structure, which is used for a locking device of an electric heavy truck, the locking device includes a cylinder and an ear seat, the cylinder is embedded in the ear seat, the cylinder and the ear seat are rotationally connected through the pin shaft self-locking structure, and the pin shaft self-locking structure includes a pin shaft, a round nut assembly and a bolt;

the pin shaft comprises a first end and a second end which are opposite, the first end and the second end are exposed out of the ear seat, the first end is provided with a pin shaft cap, the pin shaft cap is used for being abutted to one side of the ear seat, the exposed part of the second end is provided with external threads, the round nut component is sleeved on the exposed part and meshed with the external threads, the round nut component is abutted to the other side of the ear seat, the end face of the second end is provided with a threaded hole which is sunken towards the first end along the axial direction of the pin shaft, the bolt penetrates through the threaded hole and is meshed with the threaded hole, and the bolt is abutted to the round nut component;

wherein the pitch of the external thread is larger than the pitch of the bolt.

Optionally, a length of the exposed portion of the second end of the pin shaft is less than or equal to a thickness of the round nut assembly along an axial direction of the pin shaft.

Optionally, the bolt includes screw rod and nut, the screw rod with the nut is connected, the screw rod wears to locate the screw hole, and with the screw hole meshing, the nut expose in the screw hole, the nut with round nut subassembly butt.

Optionally, the pin shaft self-locking structure further comprises a baffle gasket;

the baffle gasket is arranged on one side, far away from the lug seat, of the round nut assembly and sleeved on the screw rod, one side of the baffle gasket is abutted with the round nut assembly, and the other side of the baffle gasket is abutted with the screw cap.

Optionally, a first through hole is formed in the center of the baffle gasket, the first through hole is used for penetrating the screw rod, and the size of the first through hole is smaller than the cross-sectional size of the screw cap.

Optionally, the round nut assembly comprises a round nut and a stop washer;

the stop washer is arranged on one side, far away from the baffle washer, of the round nut, the stop washer is respectively clamped with the exposed part of the second end of the pin shaft and the round nut, one side of the stop washer is abutted with the lug seat, the other side of the stop washer is abutted with one side of the round nut, and the other side of the round nut is abutted with the baffle washer.

Optionally, the stop washer comprises a washer body, wherein a second through hole is formed in the center of the washer body, and the second through hole is used for penetrating the exposed part of the second end of the pin shaft;

the inner ring of the gasket body is provided with an inner stop lug protruding towards the direction of the center of the second through hole, the side surface of the exposed part of the second end of the pin shaft is provided with a first groove recessed towards the axis direction of the pin shaft, and the inner stop lug is embedded in the first groove to be clamped with the exposed part of the second end of the pin shaft;

the outer ring of the gasket body is provided with an outer stop lug protruding in the direction away from the center of the second through hole, the outer ring of the round nut is provided with a second groove recessed in the direction of the center of the round nut, and the outer stop lug is embedded in the second groove to be clamped with the round nut.

Optionally, the number of the outer stop lugs is multiple, the multiple outer stop lugs are arranged at intervals along the circumferential direction of the outer ring of the gasket body, the number of the second grooves is consistent with the number of the outer stop lugs, and one outer stop lug is correspondingly embedded in one second groove.

Compared with the prior art, the pin shaft self-locking structure provided by the utility model has at least the following advantages:

the embodiment of the utility model provides a pin shaft self-locking structure, which is used for a locking device of an electric heavy truck, and comprises an air cylinder and an ear seat, wherein the air cylinder is embedded in the ear seat, the air cylinder is in rotary connection with the ear seat through the pin shaft self-locking structure, the pin shaft self-locking structure comprises a pin shaft, a round nut component and a bolt, the pin shaft comprises a first end and a second end which are opposite, the first end and the second end are exposed out of the ear seat, the first end is provided with a pin shaft cap, the pin shaft cap is used for being abutted with one side of the ear seat, the exposed part of the second end is provided with an external thread, the round nut component is sleeved on the exposed part and meshed with the external thread, the round nut component is abutted with the other side of the ear seat, the end face of the second end is provided with a threaded hole which is sunken towards the first end along the axial direction of the pin shaft, the bolt is penetrated in the threaded hole and meshed with the threaded hole, and the bolt is abutted with the round nut component, wherein the external thread pitch of the bolt is larger than that of the external thread. Therefore, the self-locking of the pin shaft can be realized through the round nut component connected with the pin shaft, and the self-locking of the pin shaft is further enhanced through connecting the bolt with the pitch smaller than that of the external thread at the outermost side of the second end of the pin shaft, so that the loosening of the pin shaft is effectively prevented by the double-layer self-locking structure, and the connection stability of the air cylinder and the ear seat is improved.

In a second aspect, an embodiment of the present utility model provides a locking device for an electric heavy-duty battery box, where the locking device includes an air cylinder, an ear seat, a mounting plate, and any one of the pin shaft self-locking structures described above, where the air cylinder is embedded in the ear seat, the pin shaft self-locking structure is inserted in the ear seat and the air cylinder and is respectively connected with the air cylinder and the ear seat in a rotating manner, the ear seat is connected with the mounting plate, and the mounting plate is used to connect the locking device to a base of the electric heavy-duty battery box.

The locking device has the same advantages as the pin shaft self-locking structure compared with the prior art, and the description is omitted here.

In a third aspect, an embodiment of the present utility model provides an electric heavy truck, where the electric heavy truck includes any one of the locking devices described above.

The electric heavy truck has the same advantages as the locking device compared with the prior art, and the description is omitted here.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a cross-sectional view of a pin self-locking structure provided by an embodiment of the utility model;

fig. 2 is a front view of a pin shaft self-locking structure provided by an embodiment of the utility model;

fig. 3 is a schematic view of a pin self-locking structure according to an embodiment of the present utility model;

fig. 4 is a schematic view of a baffle gasket with a pin shaft self-locking structure according to an embodiment of the present utility model;

fig. 5 is a schematic view of a lock washer with a pin shaft self-locking structure according to an embodiment of the present utility model;

fig. 6 is a schematic diagram of a round nut with a pin shaft self-locking structure according to an embodiment of the present utility model.

Reference numerals:

1-a pin shaft self-locking structure; 2-ear seats; 3-cylinder; 4-mounting plates; 10-pin shafts; 11-a round nut assembly; 12-a baffle gasket; 13-a bolt; 111-a stop washer; 112-round nuts; 101-a pin cap; 102-external threads; 103-a threaded hole; 104-a first groove; 121-a first through hole; 1111-a gasket body; 1112-a second through hole; 1113-inner stop lugs; 1114-outer stop lugs; 1121-a second groove.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements throughout or elements having like or similar functionality. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The features of the utility model "first", "second" and the like in the description and in the claims may be used for the explicit or implicit inclusion of one or more such features. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

In the description of the present utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate or are based on the orientation or relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The pin shaft self-locking structure provided by the embodiment of the utility model is described in detail below with reference to the accompanying drawings.

Referring to fig. 1 and 2, fig. 1 shows a cross-sectional view of a pin shaft self-locking structure provided by the embodiment of the utility model, fig. 2 shows a front view of the pin shaft self-locking structure provided by the embodiment of the utility model, as shown in fig. 1 and 2, the utility model provides a pin shaft self-locking structure, which is used for a locking device of an electric heavy truck, the locking device comprises a cylinder 3 and an ear seat 2, the cylinder 3 is embedded in the ear seat 2, the cylinder 3 and the ear seat 2 are rotationally connected through the pin shaft self-locking structure 1, the pin shaft self-locking structure 1 comprises a pin shaft 10, a round nut component 12 and a bolt 14, the pin shaft 10 comprises a first end and a second end which are opposite, the first end and the second end are exposed out of the ear seat 2, the first end is provided with a pin shaft cap 11, the pin shaft cap 11 is used for being abutted with one side of the ear seat 2, the exposed part of the second end is provided with an external thread 102, the round nut component 11 is sleeved on the exposed part and meshed with the external thread 102, the round nut component 11 is abutted with the other side of the ear seat 2, the end face of the second end is provided with a concave thread pitch 103 along the axial direction of the pin shaft 10 towards the first end 103, the threaded hole 103 is meshed with the threaded hole 13, and the threaded hole 13 is meshed with the threaded hole 13.

The current battery box is connected with a vehicle base through a locking device which usually comprises a cylinder, an ear seat and a mounting plate, wherein the cylinder is used for providing locking force for the locking device, the cylinder is embedded in the ear seat and is rotationally connected with the ear seat, and the mounting plate is connected with the ear seat so as to connect the locking device with the vehicle base. The pin shaft self-locking structure provided by the utility model is respectively penetrated in the air cylinder and the ear seat so as to rotationally connect the air cylinder and the ear seat.

In the embodiment of the utility model, the pin shaft self-locking structure 1 comprises a pin shaft 10, a round nut assembly 11 and a bolt 12, the ear seat 2 comprises a bottom plate, a first rib plate and a second rib plate, the first rib plate and the second rib plate are arranged perpendicular to the bottom plate and welded on the bottom plate, one end of the air cylinder 3 is embedded between the first rib plate and the second rib plate, and one end of the air cylinder 3, the first rib plate and the second rib plate are provided with through holes for penetrating the pin shaft 10.

Referring to fig. 3, a schematic diagram of a pin shaft self-locking structure provided by the embodiment of the utility model is shown, as shown in fig. 3, a pin shaft 10 includes a first end and a second end which are opposite, the first end is provided with a pin shaft cap 101, the second end sequentially passes through the first rib plate, one end of a cylinder 3 and the second rib plate, and is exposed to the second rib plate, the pin shaft cap 101 is abutted with the first rib plate, a round nut assembly 11 is sleeved on an exposed part of the pin shaft 10, and is clamped with the exposed part, the round nut assembly 11 is abutted with the second rib plate, the exposed part is provided with an external thread 102, and the round nut assembly 11 is meshed with the external thread 102.

In the embodiment of the present utility model, the end surface of the second end is provided with a threaded hole 103 recessed toward the first end along the axial direction of the pin shaft 10, the bolt 13 is penetrated through the threaded hole 103 and abuts against the round nut assembly 11, the bolt 13 is meshed with the threaded hole 103, and the pitch of the external thread 103 is greater than the pitch of the bolt 13. Therefore, on one hand, the first layer self-locking of the pin shaft is realized through the connection of the round nut component and the exposed part of the second end of the pin shaft, and on the other hand, the first layer self-locking is connected to the outermost side of the second end of the pin shaft through the bolt with the screw pitch smaller than the external screw thread, so that under the condition that the round nut component is loose, the axial moving distance of the bolt is smaller than that of the round nut component after the same angle is rotated due to the fact that the screw pitch of the bolt is smaller than that of the external screw thread, the loosening of the round nut component is effectively prevented, the self-locking of the pin shaft is further enhanced, and the loosening of the pin shaft is effectively prevented by the double-layer self-locking structure, and the stability of connection of the cylinder and the ear seat is improved.

Alternatively, in the embodiment of the present utility model, the length of the exposed portion of the second end of the pin 10 is less than or equal to the thickness of the round nut assembly 11 in the axial direction of the pin 10. Like this, under the circumstances that the round nut subassembly meshes and the butt in the opposite side of the second end of round nut subassembly and round pin axle's exposed part, exposed part can not expose in the round nut subassembly to can make the bolt under with the circumstances of screw hole meshing, can realize with the butt of round nut subassembly, avoid unable butt between round nut subassembly and the bolt, lead to the self-locking ability of round nut subassembly and bolt self-locking structure to reduce.

Specifically, in the embodiment of the present utility model, along the axial direction of the pin 10, the length of the exposed portion of the second end of the pin 10 is less than or equal to the thickness of the round nut assembly 11, that is, in the case where the round nut assembly 11 engages with the exposed portion of the second end of the pin 10 and abuts against the other side of the ear seat 2, the second end of the pin 10 is not exposed to the round nut assembly 11, so that, in the case where the bolt 13 engages with the threaded hole 103, the nut of the bolt 13 may abut against the round nut assembly, so as to avoid that there is a gap between the round nut assembly 11 and the remaining bolt 13, which may not abut, resulting in a reduced self-locking capability of the pin self-locking structure 1.

Alternatively, in the embodiment of the present utility model, the bolt 13 includes a screw rod and a nut, the screw rod is connected with the nut, the screw rod is arranged through the threaded hole 103 and is meshed with the threaded hole 103, the nut is exposed out of the threaded hole 103, and the nut is abutted against the round nut assembly 11. Therefore, the round nut component can be locked by the bolt when the round nut component is loosened under the condition that the bolt is meshed with the threaded hole through the abutting connection of the nut of the bolt and the round nut component, and further self-locking of the pin shaft self-locking structure is achieved.

Specifically, in the embodiment of the present utility model, the bolt 13 includes a screw and a nut, where the nut is disposed at one end of the screw and is connected to the screw, and the cross-sectional dimension of the nut is greater than the cross-sectional dimension of the screw along the direction perpendicular to the axial direction of the pin shaft 10, so that when the screw is threaded and engaged with the threaded hole 103, the nut can abut against the round nut assembly 11 to achieve self-locking of the pin shaft self-locking structure.

In practical applications, the threaded hole 103 may be an M6 threaded hole, and the bolt 13 may be an M6 bolt.

Optionally, in the embodiment of the present utility model, the pin shaft self-locking structure 1 further includes a baffle washer 12, where the baffle washer 12 is disposed on one side of the round nut assembly 11 away from the ear seat 2 and sleeved on the screw, one side of the baffle washer 12 abuts against the round nut assembly 11, and the other side of the baffle washer 12 abuts against the screw cap. Like this, through set up the baffle packing ring between the nut of round nut subassembly and bolt, on the one hand can protect the terminal surface of round pin axle second end not by the nut scratch, on the other hand can also increase the butt area of nut and round nut subassembly to, both can avoid the nut undersize, can't with round nut subassembly butt, can disperse the pressure of nut to round nut subassembly again.

Referring to fig. 4, a schematic diagram of a baffle gasket of a pin shaft self-locking structure provided by the embodiment of the utility model is shown, as shown in fig. 4, in the embodiment of the utility model, a baffle gasket 12 is an annular sheet, the annular sheet is arranged between a round nut assembly 11 and the nut, the annular sheet is sleeved on the screw, one side of the baffle gasket 12 close to the round nut assembly 11 is abutted with the round nut assembly 11, and one side of the baffle gasket 12 close to the nut is abutted with the nut. The diameter of the outer ring of the annular sheet is larger than the end face diameter of the second end of the pin shaft 10, so that the abutting area of the nut and the round nut assembly can be increased, the situation that the nut is too small in size and cannot abut against the round nut assembly can be avoided, and the pressure of the nut to the round nut assembly can be dispersed.

In practical applications, the material of the baffle gasket 12 may be metal or rubber, which is not limited herein.

Optionally, in the embodiment of the present utility model, a first through hole 121 is provided at the center of the baffle gasket 12, the first through hole 121 is used for penetrating the screw, and the size of the first through hole 121 is smaller than the cross-sectional size of the nut. Like this, can make the screw rod wear to locate first through-hole and with after the screw hole meshing, the nut can pass through baffle packing ring and round nut subassembly butt, realizes the further auto-lock of round pin axle self-locking structure.

In the embodiment of the utility model, the baffle gasket 12 is an annular sheet, a first through hole 121 is arranged in the middle of the annular sheet, the first through hole 121 is used for penetrating the screw, the annular sheet is sleeved on the screw, the diameter of the first through hole 121 is matched with the diameter of the screw, and the diameter of the first through hole 121 is smaller than the section diameter of the screw cap. Like this, can make the screw rod wear to locate first through-hole and with after the screw hole meshing, the nut can pass through baffle packing ring and round nut subassembly butt, realizes the further auto-lock of round pin axle self-locking structure.

Alternatively, in the embodiment of the present utility model, the round nut assembly 11 includes the round nut 112 and the stop washer 111, the stop washer 111 is disposed on one side of the round nut 112 away from the baffle washer 12, the stop washer 111 is respectively engaged with the exposed portion of the second end of the pin 10 and the round nut 112, one side of the stop washer 111 is abutted with the ear mount 2, the other side of the stop washer 111 is abutted with one side of the round nut 112, and the other side of the round nut 112 is abutted with the baffle washer 12. Therefore, the locking washer is respectively clamped with the exposed part of the second end of the pin shaft and the round nut, so that the pin shaft and the round nut realize self-locking, and the round nut cannot be loosened due to rotation of the pin shaft under the condition that the pin shaft rotates.

Specifically, in the embodiment of the present utility model, the round nut assembly 11 includes a stop washer 111 and a round nut 112, where the stop washer 111 and the round nut 112 are both sleeved on an exposed portion of the second end of the pin 10, and the stop washer 111 is disposed on a side of the round nut 112 away from the baffle washer 12, where the stop washer 111 is respectively clamped with the exposed portion of the second end of the pin 10 and the round nut 112, so as to fix the pin 10 and the round nut 112, and when the pin 10 rotates, the round nut 112 can have the same rotation angle as the pin 10, so that the rotation angle of the round nut 112 and the pin 10 is not consistent in the rotation process of the pin 10, resulting in loosening of the engagement between the round nut 112 and the exposed portion of the second end of the pin 10, and falling of the round nut 112.

In practical applications, the stop washer 111 and the round nut 112 may be made of metal such as iron, steel, etc., which is not limited herein.

Optionally, in this embodiment of the present utility model, the lock washer 111 includes a washer body 1111, a second through hole 1112 is provided in the center of the washer body 1111, the second through hole 1112 is used for penetrating the exposed portion of the second end of the pin shaft 10, an inner ring of the washer body 1111 is provided with an inner locking lug 1113 protruding toward the center of the second through hole 1112, a side surface of the exposed portion of the second end of the pin shaft 10 is provided with a first groove 104 recessed toward the axis direction of the pin shaft 10, the inner locking lug 1113 is embedded in the first groove 104 to be clamped with the exposed portion of the second end of the pin shaft 10, an outer ring of the washer body 1111 is provided with an outer locking lug 1114 protruding away from the center of the second through hole 1112, an outer ring of the round nut 112 is provided with a second groove 1121 recessed toward the center of the round nut 112, and the outer locking lug 1121 is embedded in the second groove 1121 to be clamped with the round nut 112. Therefore, the pin shaft is clamped with the round nut through the inner and outer stop lugs of the stop washer, so that the self-locking of the pin shaft and the round nut is realized, and the round nut cannot be loosened due to rotation of the pin shaft under the condition that the pin shaft rotates.

Specifically, referring to fig. 5, a schematic diagram of a stop washer with a pin shaft self-locking structure provided by the embodiment of the present utility model is shown, referring to fig. 6, a schematic diagram of a round nut with a pin shaft self-locking structure provided by the embodiment of the present utility model is shown, as shown in fig. 3, fig. 5, and fig. 6, the stop washer 111 includes a washer body 1111, the washer body 1111 is an annular sheet, a second through hole 1112 is provided in the center of the annular sheet, and the second through hole 1112 is used for penetrating an exposed portion of the second end of the pin shaft 10.

In this embodiment of the present utility model, the inner ring of the annular sheet is provided with an inner stop lug 1113 protruding toward the center of the second through hole 1112, and the side surface of the exposed portion of the second end of the pin shaft 10 is provided with a first groove 104 recessed toward the axial direction of the pin shaft 10, where the inner stop lug 1113 may be embedded in the first groove 104 to be clamped with the exposed portion of the second end of the pin shaft 10. As shown in fig. 3, the first groove 104 penetrates through the end surface of the second end of the pin shaft 10, so that the inner stop lug 1113 can be embedded in the first groove 104 along the axial direction of the pin shaft 10, wherein the width of the inner stop lug 1113 along the direction perpendicular to the protruding direction is smaller than or equal to the width of the first groove 104 along the direction perpendicular to the recessed direction, and the length of the inner stop lug 1113 along the protruding direction is smaller than or equal to the depth of the first groove 104 along the recessed direction.

In the embodiment of the present utility model, the outer ring of the annular sheet is provided with an outer stop lug 1114 protruding away from the center of the second through hole 1112, the outer ring of the round nut 112 is provided with a second groove 1121 recessed toward the center of the round nut 112, and the outer stop lug 1114 is embedded in the second groove 1121 to be clamped with the round nut 112. As shown in fig. 4 and 5, the second groove 1121 penetrates both sides of the round nut 112, and the outer stopper tab 1114 may be bent and embedded in the second groove 1121 in a state that the round nut 112 abuts against the stopper washer 111, wherein the width of the outer stopper tab 1114 in a direction perpendicular to the protruding direction thereof is less than or equal to the width of the second groove 1121 in a direction perpendicular to the recessed direction thereof.

Optionally, in the embodiment of the present utility model, the number of the outer stop lugs 1114 is a plurality, the plurality of outer stop lugs 1114 are spaced along the circumference of the outer ring of the gasket body 1111, the number of the second grooves 1121 is identical to the number of the outer stop lugs 1114, and one outer stop lug 1114 is correspondingly embedded in one second groove 1121. Therefore, the plurality of outer stop lugs can enhance the connection stability of the stop washer and the round nut, and the plurality of outer stop lugs are arranged at intervals, so that the stress of each outer stop lug is uniform, and the damage caused by overlarge stress of the outer stop lug is avoided.

Specifically, in the embodiment of the present utility model, the number of the outer stop lugs 1114 may be plural, the number of the second grooves 1121 may be plural, the plural outer stop lugs 1114 are disposed at intervals along the circumference of the outer ring of the gasket body 1111, the spacing between two adjacent outer stop lugs 1114 is equal, the number of the second grooves 1121 is consistent with the number of the outer stop lugs 1114 and corresponds to the outer stop lugs 1114 one by one, that is, the second grooves 1121 are disposed at intervals along the circumference of the outer ring of the round nut 112, the spacing between two adjacent second grooves 1121 is equal, and one outer stop lug 1114 is correspondingly embedded in one second groove 1121. Therefore, the outer stop lugs distributed at intervals are connected with the second grooves distributed at intervals in a one-to-one correspondence mode, so that the stress of each outer stop lug is uniform, and the outer stop lugs are prevented from being damaged due to overlarge stress.

Compared with the prior art, the pin shaft self-locking structure provided by the utility model has at least the following advantages:

the embodiment of the utility model provides a pin shaft self-locking structure, which is used for a locking device of an electric heavy truck, and comprises an air cylinder and an ear seat, wherein the air cylinder is embedded in the ear seat, the air cylinder is in rotary connection with the ear seat through the pin shaft self-locking structure, the pin shaft self-locking structure comprises a pin shaft, a round nut component and a bolt, the pin shaft comprises a first end and a second end which are opposite, the first end and the second end are exposed out of the ear seat, the first end is provided with a pin shaft cap, the pin shaft cap is used for being abutted with one side of the ear seat, the exposed part of the second end is provided with an external thread, the round nut component is sleeved on the exposed part and meshed with the external thread, the round nut component is abutted with the other side of the ear seat, the end face of the second end is provided with a threaded hole which is sunken towards the first end along the axial direction of the pin shaft, the bolt is penetrated in the threaded hole and meshed with the threaded hole, and the bolt is abutted with the round nut component, wherein the external thread pitch of the bolt is larger than that of the external thread. Therefore, the self-locking of the pin shaft can be realized through the round nut component connected with the pin shaft, and the self-locking of the pin shaft is further enhanced through connecting the bolt with the pitch smaller than that of the external thread at the outermost side of the second end of the pin shaft, so that the loosening of the pin shaft is effectively prevented by the double-layer self-locking structure, and the connection stability of the air cylinder and the ear seat is improved.

In a second aspect, the embodiment of the utility model provides a locking device of an electric heavy-duty battery box, which comprises a cylinder 3, an ear seat 2, a mounting plate 4 and any pin shaft self-locking structure 1, wherein the cylinder 3 is embedded in the ear seat 2, the pin shaft self-locking structure 1 is arranged on the ear seat 2 and the cylinder 3 in a penetrating manner and is respectively connected with the cylinder 3 and the ear seat 2 in a rotating manner, the ear seat 2 is connected with the mounting plate 4, and the mounting plate 4 is used for connecting the locking device to a base of the electric heavy-duty battery box.

The locking device has the same advantages as the pin shaft self-locking structure compared with the prior art, and the description is omitted here.

In a third aspect, an embodiment of the present utility model provides an electric heavy truck, where the electric heavy truck includes any one of the locking devices described above.

The electric heavy truck has the same advantages as the locking device compared with the prior art, and the description is omitted here.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. The utility model provides a round pin axle self-locking structure, is used for the locking device of electronic heavily blocking, locking device includes cylinder and ear seat, the cylinder inlays and locates the ear seat, the cylinder with the ear seat passes through round pin axle self-locking structure rotates to be connected, its characterized in that, round pin axle self-locking structure includes round pin axle, round nut subassembly and bolt;

the pin shaft comprises a first end and a second end which are opposite, the first end and the second end are exposed out of the ear seat, the first end is provided with a pin shaft cap, the pin shaft cap is used for being abutted to one side of the ear seat, the exposed part of the second end is provided with external threads, the round nut component is sleeved on the exposed part and meshed with the external threads, the round nut component is abutted to the other side of the ear seat, the end face of the second end is provided with a threaded hole which is sunken towards the first end along the axial direction of the pin shaft, the bolt penetrates through the threaded hole and is meshed with the threaded hole, and the bolt is abutted to the round nut component;

wherein the pitch of the external thread is larger than the pitch of the bolt.

2. The pin self-locking structure of claim 1, wherein a length of an exposed portion of the second end of the pin is less than or equal to a thickness of the round nut assembly along an axial direction of the pin.

3. The pin shaft self-locking structure according to claim 1, wherein the bolt comprises a screw rod and a nut, the screw rod is connected with the nut, the screw rod penetrates through the threaded hole and is meshed with the threaded hole, the nut is exposed out of the threaded hole, and the nut is abutted with the round nut component.

4. The pin self-locking structure of claim 3, further comprising a baffle washer;

the baffle gasket is arranged on one side, far away from the lug seat, of the round nut assembly and sleeved on the screw rod, one side of the baffle gasket is abutted with the round nut assembly, and the other side of the baffle gasket is abutted with the screw cap.

5. The pin shaft self-locking structure according to claim 4, wherein a first through hole is formed in the center of the baffle washer, the first through hole is used for penetrating the screw rod, and the size of the first through hole is smaller than the cross-sectional size of the screw cap.

6. The pin self-locking structure of claim 4, wherein the round nut assembly comprises a round nut and a stop washer;

the stop washer is arranged on one side, far away from the baffle washer, of the round nut, the stop washer is respectively clamped with the exposed part of the second end of the pin shaft and the round nut, one side of the stop washer is abutted with the lug seat, the other side of the stop washer is abutted with one side of the round nut, and the other side of the round nut is abutted with the baffle washer.

7. The pin shaft self-locking structure according to claim 6, wherein the stop washer comprises a washer body, a second through hole is arranged in the center of the washer body, and the second through hole is used for penetrating an exposed part of the second end of the pin shaft;

the inner ring of the gasket body is provided with an inner stop lug protruding towards the direction of the center of the second through hole, the side surface of the exposed part of the second end of the pin shaft is provided with a first groove recessed towards the axis direction of the pin shaft, and the inner stop lug is embedded in the first groove to be clamped with the exposed part of the second end of the pin shaft;

the outer ring of the gasket body is provided with an outer stop lug protruding in the direction away from the center of the second through hole, the outer ring of the round nut is provided with a second groove recessed in the direction of the center of the round nut, and the outer stop lug is embedded in the second groove to be clamped with the round nut.

8. The pin shaft self-locking structure according to claim 7, wherein the number of the outer stop lugs is a plurality, the plurality of outer stop lugs are arranged at intervals along the circumferential direction of the outer ring of the gasket body, the number of the second grooves is consistent with the number of the outer stop lugs, and one outer stop lug is correspondingly embedded in one second groove.

9. The utility model provides a locking device of electronic heavy truck battery box, its characterized in that, locking device includes cylinder, ear seat, mounting panel and the round pin axle self-locking structure of any one of claims 1-8, the cylinder inlays and locates the ear seat, round pin axle self-locking structure wears to locate the ear seat with the cylinder, and respectively with the cylinder with the ear seat rotates to be connected, the ear seat with the mounting panel is connected, the mounting panel is used for with locking device connects in the base of electronic heavy truck.

10. An electric heavy truck comprising the locking device of claim 9.