CN221860496U - Card inserting mechanism and electric energy meter detection buffer device - Google Patents

Abstract

The utility model relates to the technical field of electric energy metering, in particular to a card inserting mechanism and an electric energy meter detection buffer device, which comprises a driving part, a connecting plate, a strip-shaped groove and a bearing plate, wherein the driving part comprises a fixed plate, a double-shaft air cylinder arranged at the front side of the fixed plate, the connecting plate is arranged at the driving end of the double-shaft air cylinder, the strip-shaped groove is formed in the connecting plate, and the bearing plate is arranged at the bottom of the strip-shaped groove; the guide component comprises a limiting component arranged on one side of the fixing plate, a clamping component arranged in the middle of the limiting component and a guide component arranged in the clamping component. According to the utility model, the guide rod is connected to the rear side of the bearing plate, and the guide rod passes through the guide through hole, and then the simulation card always keeps the aligned position with the electric energy meter socket through the mutual matching among the guide through hole, the guide wheel and the spring, and the simulation card is positioned in the middle position of the electric energy meter socket, so that the adjustment of the simulation card is reduced, and the purposes of saving time and improving the detection efficiency are achieved.

Description

Card inserting mechanism and electric energy meter detection buffer device

Technical Field

The utility model relates to the technical field of electric energy metering, in particular to a card inserting mechanism and an electric energy meter detection buffer device.

Background

Under the pushing of the intelligent power grid, the related technology of the electric energy meter is continuously improved and perfected, the networked operation of each link of data collection, electric quantity measurement and the like is covered, the labor cost is effectively reduced, the quality and the efficiency of power supply are improved, particularly, the intelligent power meter technology is raised, the correlation between an electricity consumer and an electric company is further enhanced, the two-way circulation of data information of the two parties is beneficial to the electric company for improving a power supply system, and the electric power resource is more reasonably used by users.

Along with development of science and technology, the design of the electric energy meter is more and more intelligent, so that the electric energy meter needs to detect and upload data, and the current electric energy meter card inserting detection needs to adjust the position of the analog card when the card is inserted, so that the analog card is just above an electric energy meter socket, and the situation that the two are not aligned exists when the card is inserted every time, a great deal of time is spent for adjusting the analog card, and the efficiency of detecting the electric energy meter is reduced.

Disclosure of utility model

This section is intended to outline some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the utility model and in the title of the utility model, which may not be used to limit the scope of the utility model.

The present utility model has been made in view of the above or the problems of the prior art in which the position of an analog card is frequently adjusted.

It is therefore an object of the present utility model to provide a card insertion mechanism.

In order to solve the technical problems, the utility model provides the following technical scheme: the card inserting mechanism comprises a driving part, a card inserting mechanism body and a card inserting mechanism body, wherein the driving part comprises a fixing plate, a double-shaft air cylinder arranged at the front side of the fixing plate, a connecting plate arranged at the driving end of the double-shaft air cylinder, a strip-shaped groove arranged on the connecting plate, and a bearing plate arranged at the bottom of the strip-shaped groove; the guide component comprises a limiting component arranged on one side of the fixed plate, a clamping component arranged in the middle of the limiting component and a guide component arranged in the clamping component; the fixing component comprises an installation component arranged below the bearing plate, a pressing component arranged inside the installation component and a fixing component arranged inside the pressing component.

As a preferred embodiment of the card insertion mechanism of the present utility model, wherein: the limiting assembly comprises a fixed frame arranged on one side of the fixed plate, a fixed seat arranged at the bottom of the fixed frame, a limiting plate arranged on the front side of the fixed seat and a pressing plate arranged on one side of the limiting plate.

As a preferred embodiment of the card insertion mechanism of the present utility model, wherein: the clamping assembly comprises a clamping groove formed in the front side of the fixed frame, a clamping block arranged in the clamping groove, an installation shell fixed to the front side of the clamping block, and a guide through hole formed in the installation shell.

As a preferred embodiment of the card insertion mechanism of the present utility model, wherein: the guide assembly comprises a U-shaped plate arranged in the installation shell, guide wheels arranged in the U-shaped plate, guide rods arranged on the opposite sides of the guide wheels, and springs arranged at the ends of the U-shaped plate.

As a preferred embodiment of the card insertion mechanism of the present utility model, wherein: the installation component including set up in the mounting panel of loading board below, set up in a plurality of fixed orificess on mounting panel surface, set up in the analog card of mounting panel one side, and set up in the analog card clamp plate of analog card one side.

As a preferred embodiment of the card insertion mechanism of the present utility model, wherein: the pressing assembly comprises a pressing rod penetrating through one side of the simulation clamping plate, a moving rod arranged on one side of the pressing rod, a wedge block arranged on the opposite side of the moving rod, T-shaped grooves formed in two sides of the wedge block, T-shaped blocks arranged in the T-shaped grooves, and extending blocks fixed on one side of the T-shaped grooves.

As a preferred embodiment of the card insertion mechanism of the present utility model, wherein: the fixed subassembly is including seting up in the recess at movable rod top, set up in the extension rod of movable rod top, set up in reset spring of extension rod one side, and seting up the holding tank of extension rod outer wall.

The card inserting mechanism has the beneficial effects that: according to the utility model, the guide rod is connected to the rear side of the bearing plate, and the guide rod passes through the guide through hole, and then the simulation card always keeps the aligned position with the electric energy meter socket through the mutual matching among the guide through hole, the guide wheel and the spring, and the simulation card is positioned in the middle position of the electric energy meter socket, so that the adjustment of the simulation card is reduced, and the purposes of saving time and improving the detection efficiency are achieved.

In view of the impact force generated during card insertion in the actual use process, the problem of easy damage to the analog card is also caused.

In order to solve the technical problems, the utility model also provides the following technical scheme: the utility model provides an electric energy meter detects buffer, includes buffer unit, including set up in the inside linear bearing of loading board, the cover is located the inside telescopic shaft of linear bearing, set up in the separation blade of linear bearing bottom, and the cover is located the outside buffer spring of telescopic shaft.

As a preferable scheme of the electric energy meter detection buffer device, the utility model comprises the following steps: the telescopic shaft is in sliding connection with the linear bearing, and the bottom end of the telescopic shaft is fixedly connected with the mounting plate.

As a preferable scheme of the electric energy meter detection buffer device, the utility model comprises the following steps: the buffer spring top fixed connection is inside the separation blade, buffer spring bottom and mounting panel fixed connection.

The electric energy meter detection buffer device has the beneficial effects that: the buffer spring is extruded to generate upward force which is opposite to the direction of the force generated by the double-shaft air cylinder, so that the impact force generated by the double-shaft air cylinder downwards is counteracted, the risk of damage of the simulation card is reduced, and the service life is prolonged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

Fig. 1 is an overall schematic view of a card insertion mechanism.

Fig. 2 is another angular schematic view of the card insertion mechanism as a whole.

Fig. 3 is an enlarged view of a in fig. 1.

Fig. 4 is a schematic view of a guide member for the card insertion mechanism.

Fig. 5 is a schematic cross-sectional view of the guide member mounting housing.

Fig. 6 is a schematic view of a mounting member for the card insertion mechanism.

Fig. 7 is a schematic cross-sectional view of a simulated clamp plate for mounting a component.

Fig. 8 is a schematic view of a wedge for a pressing assembly.

Fig. 9 is a bottom view of the mounting component securing assembly.

Fig. 10 is an overall schematic diagram of a buffer mechanism for an electric energy meter detection buffer device.

Fig. 11 is an exploded schematic view of a buffer mechanism for a detection buffer device of an electric energy meter.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present utility model is not limited to the specific embodiments disclosed below.

Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the utility model. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1 to 5, in a first embodiment of the present utility model, a card inserting mechanism is provided, which includes a driving component 100, including a fixing plate 101, a dual-shaft cylinder 102 disposed on the front side of the fixing plate 101, a connecting plate 103 disposed on the driving end of the dual-shaft cylinder 102, a bar-shaped slot 104 formed on the connecting plate 103, and a bearing plate 105 disposed at the bottom of the bar-shaped slot 104; wherein, connect through the bolt between connecting plate 103 and the loading board 105, and the bolt can slide in the inside of strip groove 104 to can not cause the hindrance to the removal of simulation card, secondly, can also make things convenient for the bolt to be connected with the screw on the loading board 105 through setting up strip groove 104, also conveniently fix loading board 105, direction part 200 is including setting up in the restriction subassembly 201 of fixed plate 101 one side, sets up in the block subassembly 202 at restriction subassembly 201 middle part, and sets up in the inside direction subassembly 203 of block subassembly 202.

Specifically, the restriction assembly 201 includes a fixed frame 201a disposed on one side of the fixed plate 101, a fixed seat 201b disposed at the bottom of the fixed frame 201a, a restriction plate 201c disposed on the front side of the fixed seat 201b, and a pressing plate 201d disposed on one side of the restriction plate 201c, the engagement assembly 202 includes an engagement groove 202a formed on the front side of the fixed frame 201a, an engagement block 202b disposed inside the engagement groove 202a, a mounting case 202c fixed on the front side of the engagement block 202b, and a guide through hole 202d formed in the mounting case 202c, the guide assembly 203 includes a U-shaped plate 203a disposed inside the mounting case 202c, a guide roller 203b disposed inside the U-shaped plate 203a, a guide rod 203c disposed on the opposite side of the guide roller 203b, and a spring 203d disposed at the end of the U-shaped plate 203 a.

Wherein, through the mutual matching between the clamping groove 202a and the clamping block 202b, the guide part 200 is installed, and then when the centers of the guide rod 203c, the guide through hole 202d and the electric energy meter jack are positioned on the same horizontal line through the adjustment of the guide part 200, wherein, the other end of the U-shaped plate 203a is provided with the spring 203d and fixed on one side of the installation shell 202c, the two springs 203d have the same performance, in addition, the gap between the two guide wheels 203b is smaller than the diameter of the guide rod 203c, the guide through hole 202d is matched with the guide rod 203c, therefore, when the guide rod 203c is required to enter the guide through hole 202d from the two guide wheels 203b, the two guide wheels 203b are forced to expand outwards, the spring 203d is extruded, and the spring 203d is extruded, a force in the opposite direction is generated, therefore, the two guide wheels 203b are contracted, the guide rods 203c are simply extruded, the two springs 203d have the same performance, and the guide wheels 203b on the two sides are symmetrical with respect to the guide through holes 202d, so that the movement of the springs 203d on the two sides is consistent, when the guide wheels 203b on the two sides are close to the same side, the guide rods 203c are positioned on the central line of the guide through holes 202d, centering is achieved, then the guide parts 200 are fixed by tightening bolts, the guide rods 203c are fixed on the bearing plate 105, and therefore, when the positions of the three parts are adjusted, the bearing plate 105 is also adjusted to a proper position, in addition, a limiting plate 201c is arranged at the bottom of the fixed frame 201a and matched with the pressing plate 201d to form a hole groove, and the edge parts of the two parts are subjected to chamfering treatment, so that the abrasion is reduced.

The operation process comprises the following steps: the position of the guide member 200 is first adjusted to align the center of the restriction plate 201c with the center of the electric energy meter socket, and the installation housing 202c is additionally adjusted to make the center line of the guide through hole 202d coincide with the center line of the restriction plate 201c, i.e., the adjustment is completed, and then the guide member 200 is fixed by a bolt, and then centering is achieved by the guide rod 203c passing through from the inside of the guide through hole 202d, wherein guide wheels 203b are respectively provided at both sides of the front end of the guide through hole 202d, and the guide wheels 203b at both sides are symmetrical with respect to the center line of the guide through hole 202d, wherein a gap is formed between the two guide wheels 203b because the guide wheels 203b at both sides are symmetrical with respect to the center line of the guide through hole 202d, and the gap formed between the two guide wheels 203b is also symmetrical with respect to the center line of the guide through hole 202d, and the diameter of the gap is smaller than the diameter of the guide rod 203c, so that when the guide rod 203c passes through, the guide wheels 203b at both sides are expanded outwards, and the guide wheels 203b are pressed by the U203 a spring 203d when the guide wheels 203b expand outwards, and the guide wheels 203b are moved inwards by the reaction force of the spring 203d, so that the guide wheels 203b are moved inwards, and the guide wheels 203b are moved to the side due to the center line of the guide wheels 203 d.

Example 2

Referring to fig. 6 to 9, unlike the previous embodiment, the present utility model provides a fixing component 300 of a card inserting mechanism, which includes a mounting assembly 301 disposed below a carrier plate 105, a pressing assembly 302 disposed inside the mounting assembly 301, and a fixing assembly 303 disposed inside the pressing assembly 302, wherein the mounting assembly 301 includes a mounting plate 301a disposed below the carrier plate 105, a plurality of fixing holes 301b formed on a surface of the mounting plate 301a, a dummy card 301c disposed on one side of the mounting plate 301a, and a dummy card pressing plate 301d disposed on one side of the dummy card 301c, wherein a plurality of fixing holes 301b are formed on surfaces of the mounting plate 301a and the dummy card 301c, and holes corresponding to the fixing holes 301b are formed on a surface of the dummy card 301c, and the dummy card 301c is mounted and fixed by the dummy card pressing plate 301 d.

Specifically, the pressing assembly 302 includes a pressing rod 302a penetrating through one side of the analog clamping plate 301d, a moving rod 302b disposed on one side of the pressing rod 302a, wherein the accommodating groove 303b slides in the analog clamping plate 301d, and a slot is formed on the front side of the analog clamping plate 301d, the pressing rod 302a passes through the slot and is fixedly connected with the moving rod 302b, a wedge block 302c disposed on the opposite side of the moving rod 302b, T-shaped grooves 302d disposed on both sides of the wedge block 302c, T-shaped blocks 302e mounted inside the T-shaped grooves 302d, and an extension block 302f fixed on one side of the T-shaped grooves 302d, such that the wedge block 302c can stably perform a telescoping action while the moving rod 302b can enter into the fixing hole 301b, thereby achieving the fixing purpose.

Further, the fixing component 303 includes a groove 303a formed at the top of the moving rod 302b, an extension rod 303c formed above the moving rod 302b, a return spring 303d formed at one side of the extension rod 303c, and a receiving groove 303b formed at the outer wall of the extension rod 303c, firstly, when the moving rods 302b at both sides are close to each other, since there are inclined blocks in the groove 303a and the receiving groove 303b and the directions of the inclined blocks are opposite, when the moving rods 302b are close to each other, the extension rod 303c moves slowly backwards and gradually comes out from the fixing hole 301b, and in addition, the space of the receiving groove 303b on the extension rod 303c is enough, that is, the extension rod 303c does not come out from the fixing hole 301b completely, the end faces of the two are not contacted, and the movement between the two is not interfered.

The operation process comprises the following steps: firstly, the pressing rod 302a is pressed inwards, so that the moving rod 302b moves, in the moving process of the moving rod 302b, the wedge block 302c moves backwards, and comes out of the corresponding fixing hole 301b on the mounting plate 301a, wherein a groove 303a and a containing groove 303b are respectively arranged on the surfaces of the moving rod 302b and the extending rod 303c, the groove 303a is matched with the extending rod 303c, the containing groove 303b is matched with the moving rod 302b, inclined blocks are respectively arranged in the groove 303a and the containing groove 303b, and are complementary, so that when the moving rod 302b moves inwards, the extending rod 303c moves backwards due to the action of the two inclined blocks, and comes out of the fixing hole 301b correspondingly on the mounting plate 301a, then the pressing rod 302a is continuously pressed inwards until a cylinder extending out of the end of the moving rod 302b comes out of the mounting plate 301a, so that the dismounting of the analog card is completed, and when the mounting plate 303a is mounted, the groove 303a is gradually overlapped with the containing groove 303b on the outer side, and the extending rod 303b comes into the fixing hole 301b, and the extending rod 303b is correspondingly moved inwards, and the extending rod 302b is also moved into the fixing hole 301 b.

In addition, the bearing plate 105 is adjusted by the guide component 200, the center line of the bearing plate 105 is just above the electric energy meter socket, and the bearing plate 105 indirectly drives the analog card 301c to be also directly above the electric energy meter socket, because the center line of the mounting plate 301a coincides with the center line of the bearing plate 105, and the analog card 301c is arranged on the center line of the analog card 301c, so that the analog card 301c is always directly above the electric energy meter socket through the adjustment of the guide component 200.

Example 3

Referring to fig. 10 to 11, in a third embodiment of the present utility model, unlike the previous embodiment, the embodiment provides an electric energy meter detection buffer device, which includes a buffer component 400, including a linear bearing 401 disposed inside a bearing plate 105, a telescopic shaft 402 sleeved inside the linear bearing 401, a baffle 403 disposed at the bottom of the linear bearing 401, and a buffer spring 404 sleeved outside the telescopic shaft 402, wherein the telescopic shaft 402 is slidably connected with the linear bearing 401, the bottom end of the telescopic shaft 402 is fixedly connected with a mounting plate 301a, the top end of the buffer spring 404 is fixedly connected inside the baffle 403, and the bottom end of the buffer spring 404 is fixedly connected with the mounting plate 301 a.

The operation process comprises the following steps: because the biax cylinder 102 produces certain impact force when carrying out the drive arrangement and inserting the card action, buffer spring 404 receives the extrusion at this moment, and buffer spring 404 length reduces, its buffer spring 404 will resume original length and produce another force, and the direction of this force is opposite to the direction of impact force, thereby buffer spring 404 exists and can offset some impact force, thereby avoid receiving the damage to the analog card when detecting the electric energy meter, 402a connects on mounting panel 301a in addition, be provided with the structure of similar lid at the other end of telescopic shaft 402, in order to prevent telescopic shaft 402 from breaking away from inside linear bearing 401, therefore through the cooperation between telescopic shaft 402 and the linear bearing 401, guarantee that mounting panel 301a can stable removal, and take place to rock, in addition, through setting up linear bearing 401 and loading board 105 at the outer wall of telescopic shaft 402 and being connected, the purpose is reduced telescopic shaft 402's wearing and tearing degree, increase of service life.

It is important to note that the construction and arrangement of the utility model as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of present utility model. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present utility models. Therefore, the utility model is not limited to the specific embodiments, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Furthermore, in order to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those not associated with the best mode presently contemplated for carrying out the utility model, or those not associated with practicing the utility model).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.

It should be noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present utility model may be modified or substituted without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered in the scope of the claims of the present utility model.

Claims (10)

1. A card insertion mechanism, characterized in that: comprising the steps of (a) a step of,

The driving component (100) comprises a fixed plate (101), a double-shaft air cylinder (102) arranged on the front side of the fixed plate (101), a connecting plate (103) arranged on the driving end of the double-shaft air cylinder (102), a strip-shaped groove (104) formed in the connecting plate (103), and a bearing plate (105) arranged at the bottom of the strip-shaped groove (104);

The guide component (200) comprises a limiting component (201) arranged on one side of the fixed plate (101), a clamping component (202) arranged in the middle of the limiting component (201), and a guide component (203) arranged in the clamping component (202);

The fixing component (300) comprises an installation component (301) arranged below the bearing plate (105), a pressing component (302) arranged inside the installation component (301), and a fixing component (303) arranged inside the pressing component (302).

2. The card insertion mechanism of claim 1, wherein: the limiting assembly (201) comprises a fixed frame (201 a) arranged on one side of the fixed plate (101), a fixed seat (201 b) arranged at the bottom of the fixed frame (201 a), a limiting plate (201 c) arranged on the front side of the fixed seat (201 b), and a pressing plate (201 d) arranged on one side of the limiting plate (201 c).

3. The card insertion mechanism of claim 2, wherein: the clamping assembly (202) comprises a clamping groove (202 a) formed in the front side of the fixed frame (201 a), a clamping block (202 b) arranged in the clamping groove (202 a), a mounting shell (202 c) fixed to the front side of the clamping block (202 b), and a guide through hole (202 d) formed in the mounting shell (202 c).

4. A card insertion mechanism according to claim 3, wherein: the guide assembly (203) comprises a U-shaped plate (203 a) arranged in the installation shell (202 c), a guide wheel (203 b) arranged in the U-shaped plate (203 a), a guide rod (203 c) arranged on the opposite side of the guide wheel (203 b), and a spring (203 d) arranged at the end part of the U-shaped plate (203 a).

5. The card insertion mechanism according to claim 4, wherein: the mounting assembly (301) comprises a mounting plate (301 a) arranged below the bearing plate (105), a plurality of fixing holes (301 b) formed in the surface of the mounting plate (301 a), a simulation card (301 c) arranged on one side of the mounting plate (301 a), and a simulation card pressing plate (301 d) arranged on one side of the simulation card (301 c).

6. The card insertion mechanism according to claim 5, wherein: the pressing assembly (302) comprises a pressing rod (302 a) penetrating through one side of the simulation clamping plate (301 d), a moving rod (302 b) arranged on one side of the pressing rod (302 a), a wedge block (302 c) arranged on the opposite side of the moving rod (302 b), T-shaped grooves (302 d) formed in two sides of the wedge block (302 c), T-shaped blocks (302 e) mounted in the T-shaped grooves (302 d), and protruding blocks (302 f) fixed on one side of the T-shaped grooves (302 d).

7. The card insertion mechanism according to claim 6, wherein: the fixed component (303) comprises a groove (303 a) formed in the top of the moving rod (302 b), an extension rod (303 c) arranged above the moving rod (302 b), a return spring (303 d) arranged on one side of the extension rod (303 c), and a containing groove (303 b) formed in the outer wall of the extension rod (303 c).

8. An electric energy meter detects buffer, its characterized in that: comprising the card insertion mechanism of any one of claims 1 to 7, and

The buffer component (400) comprises a linear bearing (401) arranged in the bearing plate (105), a telescopic shaft (402) sleeved in the linear bearing (401), a baffle (403) arranged at the bottom of the linear bearing (401), and a buffer spring (404) sleeved outside the telescopic shaft (402).

9. The power meter test buffer of claim 8 wherein: the telescopic shaft (402) is in sliding connection with the linear bearing (401), and the bottom end of the telescopic shaft (402) is fixedly connected with the mounting plate (301 a).

10. The power meter test buffer of claim 9 wherein: the top end of the buffer spring (404) is fixedly connected inside the baffle plate (403), and the bottom end of the buffer spring (404) is fixedly connected with the mounting plate (301 a).