CN218192381U - Machine case is frock clamp structure for riveting - Google Patents

Abstract

The utility model discloses a tool clamp structure for riveting a machine case, which comprises a fixed base and a fixed vertical plate arranged on the fixed base, wherein the fixed vertical plate is provided with a back plate positioning and clamping component, and the upper end part of the fixed base is provided with a plurality of rib plate positioning and clamping components which are arranged from left to right at intervals in sequence on the front end side of the fixed vertical plate; gusset location centre gripping subassembly is including the left side fixed grip block, the right side erection support of screw-thread fastening in unable adjustment base upper surface respectively, and left side fixed grip block is located the left end side of right side erection support, and left side fixed grip block and right side erection support interval are just to arranging, installs middle activity grip block between left side fixed grip block and the right side erection support, and right side erection support installs towards the elastic mechanism of left side elasticity top middle activity grip block. Through the structure design, the utility model has the advantages of structural design is novel, the clamping location is convenient fast, the security is high.

Description

Machine case is frock clamp structure for riveting

Technical Field

The utility model relates to a frock clamp technical field especially relates to a frock clamp structure is used in case riveting.

Background

For a sheet-metal chassis product, the sheet-metal chassis product generally comprises a chassis back plate and a plurality of chassis rib plates, wherein each chassis rib plate is assembled on the chassis back plate in a riveting mode. In the process of riveting and assembling the chassis back plate and the chassis rib plate, the chassis back plate and the chassis rib plate need to be positioned and clamped by a tool clamp; during positioning and clamping, the riveting assembly tool clamp needs to position and clamp the chassis back plate through the back plate positioning and clamping assembly, and then the chassis rib plate is placed at the corresponding riveting position and positioned and clamped through the rib plate positioning and clamping assembly.

It should be noted that, for the clamping and fixing of the machine case rib plate, the prior art generally adopts a manual quick clamp or a pneumatic clamp to position and clamp. For the manual quick clamping positioning and clamping mode, during operation, the machine case rib plate needs to be positioned manually, then the quick clamping operation is performed through manual operation to clamp and fix the machine case rib plate, a worker often positions the machine case rib plate with one hand and operates the quick clamping operation with the other hand, and the quick clamping operation needs to be performed with one hand to press the fixed machine case rib plate when the quick clamping operation is closed, so that the risk of clamping hands exists, and the whole positioning and clamping process is inconvenient and the clamping efficiency is low.

In addition, for the mode of realizing the positioning and clamping of the chassis rib plate through the pneumatic clamp, the patent numbers are as follows: ZL201410675100.4, patent name: the Chinese patent of a riveting device of a dishwasher box body and a reinforcing plate discloses a pneumatic clamping and positioning structure, which specifically comprises: the positioning cylinder, the shield-shaped clamping block arranged on the piston rod of the positioning cylinder and the transverse positioning supporting block arranged on the base and matched with the lower end face of the shield-shaped clamping block, when the positioning cylinder is used for clamping and positioning, the reinforcing plate (rib plate) is positioned on the transverse positioning supporting block, then the positioning cylinder acts and drives the shield-shaped clamping block to tightly press and fix the reinforcing plate, if the mode that the reinforcing plate is firstly positioned and placed on the transverse positioning supporting block is adopted, the condition of clamping hands during the action of the cylinder can exist, and the safety is poor; and if the manipulator is adopted for automatic discharging, the cost is overhigh. In addition, for the pneumatic positioning and clamping structure, on one hand, the defect of high cost exists, and on the other hand, the pneumatic positioning and clamping structure is difficult to be applied to the situation that the installation positions of adjacent reinforcing rib plates are very close.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a machine case is frock clamp structure for riveting to prior art's not enough, this machine case is quick convenient and the security is high with clamping tool structural design novelty, clamping location for riveting.

In order to achieve the above purpose, the present invention is achieved by the following technical solutions.

A tool clamp structure for riveting a machine case comprises a fixed base and a fixed vertical plate arranged on the fixed base, wherein the fixed vertical plate is provided with a back plate positioning and clamping assembly, and the upper end part of the fixed base is provided with a plurality of rib plate positioning and clamping assemblies which are sequentially arranged from left to right at intervals on the front end side of the fixed vertical plate;

gusset location centre gripping subassembly is including the left side fixed grip block, the right side erection support of screw-thread fastening in unable adjustment base upper surface respectively, and left side fixed grip block is located the left end side of right side erection support, and left side fixed grip block and right side erection support interval are just to arranging, installs middle activity grip block between left side fixed grip block and the right side erection support, and right side erection support installs towards the elastic mechanism of left side elasticity top middle activity grip block.

The elastic mechanism comprises at least two guide posts which horizontally extend along the left and right directions, and the left end parts of the guide posts are screwed and fastened on the middle movable clamping plate respectively;

the right mounting support is respectively provided with a guide sleeve corresponding to each guide pillar, and the right end part of each guide pillar is respectively embedded in the central hole of the corresponding guide sleeve;

the middle part of each guide pillar is respectively sleeved with a compression spring, the left end part of the compression spring is abutted with the middle movable clamping plate, and the right end part of the compression spring is abutted with the corresponding guide sleeve.

The left end part and the right end part of the guide sleeve are respectively sleeved and clamped with a limiting clamping ring, the limiting clamping ring on the left side is located on the left side of the right side mounting support, the limiting clamping ring on the right side is located on the right side of the right side mounting support, and the guide sleeve is limited and mounted on the right side mounting support through the two limiting clamping rings.

The guide post is further sleeved with an auxiliary gasket, the auxiliary gasket is located between the compression spring and the guide sleeve, and the right end of the compression spring is abutted to the auxiliary gasket.

And the right end part of the guide pillar is fixedly screwed with a limit washer, and the limit washer is positioned on the right end side of the guide sleeve.

The backboard positioning and clamping assembly comprises a left limit stop and a right limit stop, the left limit stop is screwed and fastened at the left end part of the front surface of the fixed vertical plate, and the right limit stop is screwed and fastened at the right end part of the front surface of the fixed vertical plate;

the front surface of the fixed vertical plate is provided with a left quick clamp at the upper end side of the left limit stop, and the front surface of the fixed vertical plate is provided with a right quick clamp at the upper end side of the right limit stop.

The back plate positioning and clamping assembly comprises a back plate positioning pin mechanism, the back plate positioning pin mechanism comprises a positioning pin mounting seat which is screwed and fastened on the rear surface of the fixed vertical plate, the positioning pin mounting seat is provided with a positioning pin mounting hole which completely penetrates through the front and the back, a movable positioning pin is embedded in the positioning pin mounting hole, and the front end part of the movable positioning pin protrudes out of the front surface of the fixed vertical plate;

a positioning pin limiting block is screwed on the rear end side of the positioning pin mounting hole of the positioning pin mounting seat, the positioning pin limiting block is provided with a screw mounting hole which is aligned with the positioning pin mounting hole in front and back, and a limiting screw screwed with the rear end part of the movable positioning pin is embedded in the screw mounting hole of the positioning pin limiting block;

and a return spring is further embedded in the positioning pin mounting hole, the front end part of the return spring is abutted against the movable positioning pin, and the rear end part of the return spring is abutted against the positioning pin mounting seat.

The movable positioning pin is provided with a positioning pin retaining shoulder with a backward normal direction, the inner wall of the positioning pin mounting hole is provided with a mounting seat retaining shoulder, the reset spring is sleeved on the periphery of the movable positioning pin, and the reset spring is positioned between the positioning pin retaining shoulder and the mounting seat retaining shoulder;

the front end part of the reset spring is abutted against the retaining shoulder of the positioning pin, and the rear end part of the reset spring is abutted against the retaining shoulder of the mounting seat.

The fixed base is provided with base through holes which are completely penetrated up and down corresponding to the middle movable clamping plates, movable jacking blocks which move up and down relative to the fixed base are embedded in the base through holes respectively, and jacking inclined planes are arranged at the upper end parts of the movable jacking blocks;

the fixed base is provided with ejector block driving mechanisms corresponding to the movable ejector blocks respectively, and the ejector block driving mechanisms are in driving connection with the corresponding movable ejector blocks.

The ejecting block driving mechanism comprises an ejecting block driving cylinder which is screwed and fastened on the lower surface of the fixed base and moves up and down, and the extending end part of a piston rod of the ejecting block driving cylinder is connected with the lower end part of the movable ejecting block.

The utility model has the advantages that: the utility model relates to a frock clamp structure for riveting machine case, which comprises a fixed base and a fixed vertical plate arranged on the fixed base, wherein the fixed vertical plate is provided with a backboard positioning and clamping component, and the upper end part of the fixed base is provided with a plurality of rib plate positioning and clamping components which are arranged at intervals from left to right in turn at the front end side of the fixed vertical plate; gusset location centre gripping subassembly is including the left side fixed grip block, the right side erection support of difference spiral shell dress fastening in unable adjustment base upper surface, and left side fixed grip block is located the left side of right side erection support distolaterally, and left side fixed grip block just to arranging with right side erection support interval, has installed middle activity grip block between left side fixed grip block and the right side erection support, and right side erection support has installed towards the elastic mechanism of middle activity grip block of left side elasticity top. Through the structure design, the utility model has the advantages of structural design is novel, the clamping location is convenient fast, the security is high.

Drawings

The invention will be further described with reference to the drawings to which, however, the embodiments shown in the drawings do not constitute any limitation of the invention.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of another view angle of the present invention.

Fig. 3 is a schematic structural diagram of another view angle of the present invention.

Fig. 4 is a schematic structural view of the rib plate positioning and clamping assembly of the present invention.

Fig. 5 is a schematic structural diagram of the back plate positioning pin mechanism of the present invention.

Fig. 1 to 5 include:

1-fixed base; 11-base through hole; 2-fixing a vertical plate; 3-back plate positioning and clamping component; 311-left limit stop; 312-right bump stop; 321-left quick clamp; 322-Right quick clip; 33-back plate positioning pin mechanism; 331-dowel pin mounting seat; 3311-positioning pin mounting hole; 3312-mount shoulder; 332-Movable locating pins; 3321-locating pin shoulder; 333-positioning pin limiting block; 3331-screw mounting holes; 334-limit screw; 335-return spring; 4, positioning and clamping the rib plate; 41-left fixed clamping plate; 42-right side mounting bracket; 43-middle movable clamping plate; 44-elastic means; 441-guide post; 442-guide sleeve; 443-compression spring; 444-limiting collar; 445 — backup washer; 446-a spacing washer; 5-case back plate; 6-chassis rib plate.

Detailed Description

The present invention will be described with reference to specific embodiments.

In a first embodiment, as shown in fig. 1 to 5, a tooling fixture structure for riveting a machine case includes a fixed base 1 and a fixed vertical plate 2 disposed on the fixed base 1, a back plate positioning and clamping component 3 is disposed on the fixed vertical plate 2, and a plurality of rib plate positioning and clamping components 4 sequentially arranged from left to right at intervals are disposed on the front end side of the fixed vertical plate 2 at the upper end of the fixed base 1.

It should be noted that, as shown in fig. 4, the rib plate positioning and clamping assembly 4 includes a left fixed clamping plate 41 and a right mounting bracket 42 respectively screwed and fastened on the upper surface of the fixed base 1, the left fixed clamping plate 41 is located at the left end side of the right mounting bracket 42, the left fixed clamping plate 41 and the right mounting bracket 42 are arranged opposite to each other at an interval, a middle movable clamping plate 43 is installed between the left fixed clamping plate 41 and the right mounting bracket 42, and the right mounting bracket 42 is installed with an elastic mechanism 44 for elastically pushing the middle movable clamping plate 43 toward the left.

In the process of clamping and positioning the chassis back plate 5 and the chassis rib plate 6 by using the clamping tool structure for riveting the chassis in the first embodiment, the chassis back plate 5 is firstly abutted against the front surface of the fixed vertical plate 2, and then the chassis back plate 5 is positioned, clamped and fixed on the front surface of the fixed vertical plate 2 through the back plate positioning and clamping assembly 3; after the clamping and positioning of the chassis back plate 5 are finished, a plurality of chassis rib plates 6 are sequentially placed into rib plate positioning and clamping components 4 at corresponding positions, so that the corresponding chassis rib plates 6 are clamped and fixed through the rib plate positioning and clamping components 4, and the chassis back plate 5 and the chassis rib plates 6 before the chassis riveting process is finally completed are clamped and fixed.

It should be noted that, as shown in fig. 4, in the process of clamping and fixing the chassis rib plate 6 by the rib plate positioning and clamping assembly 4, the middle movable clamping plate 43 is pushed towards the right side first and the elastic mechanism 44 is compressed, so that sufficient space for placing the chassis rib plate 6 is provided between the middle movable clamping plate 43 and the left fixed clamping plate 41; after the middle movable clamping plate 43 is pushed to the right, the machine case rib plate 6 is placed between the left fixed clamping plate 41 and the middle movable clamping plate 43, and under the reset elastic action of the elastic mechanism 44, the left fixed clamping plate 41 is matched with the middle movable clamping plate 43 to automatically clamp and fix the machine case rib plate 6, namely, a worker does not need to operate a quick clamp or start an air cylinder structure, and the machine case rib plate fixing device is simple and convenient. The first embodiment of the present invention employs a profiling design for the left fixed clamping plate 41 and the middle movable clamping plate 43, that is, the left fixed clamping plate 41 and the right movable clamping plate can accurately position the rib plate 6 of the chassis. For the rib plate positioning and clamping assembly 4 in the first embodiment, quick clamping and fixing of the chassis rib plate 6 can be realized.

It should be emphasized that, in the first embodiment of the present invention, the middle movable clamping plate 43 and the left fixed clamping plate 41 close and clamp the chassis rib plate 6 by the restoring elastic force of the elastic mechanism 44,

synthesize above-mentioned circumstances and know, through above-mentioned structural design, the quick-witted case frock clamp structure for riveting of this embodiment one has structural design novelty, the quick convenient, the high advantage of security of clamping location.

In the second embodiment, as shown in fig. 4, the difference between the second embodiment and the first embodiment is: the elastic mechanism 44 includes at least two guide posts 441 extending horizontally in the left-right direction, and the left end of each guide post 441 is screwed to the middle movable clamping plate 43.

Wherein, the right side mounting support 42 is provided with a guide sleeve 442 corresponding to each guide post 441, and the right end of each guide post 441 is inserted into the central hole of the corresponding guide sleeve 442.

Further, a compression spring 443 is fitted to the middle of each guide post 441, the left end of the compression spring 443 abuts against the middle movable holding plate 43, and the right end of the compression spring 443 abuts against the corresponding guide sleeve 442.

Each compression spring 443 is compressed in the process that the middle movable holding plate 43 moves toward the right side and the middle movable holding plate 43 is separated from the left fixed holding plate 41; when the chassis rib plate 6 is placed between the middle movable clamping plate 43 and the left fixed clamping plate 41 and the middle movable clamping plate 43 is loosened, the middle movable clamping plate 43 moves towards the left side under the action of the return elastic force of the compression spring 443, and the middle movable clamping plate 43 is matched with the left fixed clamping plate 41 and clamps and fixes the chassis rib plate 6.

In a third embodiment, as shown in fig. 4, a difference between the third embodiment and the second embodiment is that the guide sleeve 442 of the third embodiment is limitedly mounted on the right mounting base 42 by the following means: the left end and the right end of the guide sleeve 442 are respectively sleeved with a limit collar 444, the left limit collar 444 is located on the left end side of the right mounting support 42, the right limit collar 444 is located on the right end side of the right mounting support 42, and the guide sleeve 442 is limited and mounted on the right mounting support 42 through the two limit collars 444.

In the fourth embodiment, as shown in fig. 4, the difference between the fourth embodiment and the second embodiment is: the guide post 441 is further fitted with an auxiliary washer 445, the auxiliary washer 445 is positioned between the compression spring 443 and the guide sleeve 442, and the right end portion of the compression spring 443 abuts against the auxiliary washer 445.

The compression spring 443 of the fourth embodiment directly contacts with the auxiliary washer 445, so that the compression spring 443 can be effectively prevented from directly contacting with the guide sleeve 442, and the service life of the guide sleeve 442 can be effectively prolonged.

In the fifth embodiment, as shown in fig. 4, the difference between the fifth embodiment and the second embodiment is: a limit washer 446 is screwed to the right end of the guide post 441, and the limit washer 446 is positioned on the right end side of the guide sleeve 442.

In the fifth embodiment, during the assembly process, the limiting washer 446 can effectively prevent the guide post 441 from exiting from the central hole of the corresponding guide sleeve 442, so that the convenience of the fifth embodiment during assembly can be effectively improved.

In a sixth embodiment, as shown in fig. 1 to 3, the difference between the sixth embodiment and the first embodiment is: the backboard positioning and clamping component 3 comprises a left limit stop 311 and a right limit stop 312, the left limit stop 311 is screwed and fastened at the left end part of the front surface of the fixed vertical plate 2, and the right limit stop 312 is screwed and fastened at the right end part of the front surface of the fixed vertical plate 2;

the front surface of the fixed vertical plate 2 is screwed with a left quick clamp 321 on the upper end side of the left limit stop 311, and the front surface of the fixed vertical plate 2 is screwed with a right quick clamp 322 on the upper end side of the right limit stop 312.

In the process of abutting the chassis back plate 5 against the front surface of the fixed vertical plate 2, in the sixth embodiment, the left end edge of the chassis back plate 5 is limited and blocked by the left limiting stopper 311, and in the sixth embodiment, the right end edge of the chassis back plate 5 is limited and blocked by the right limiting stopper 312, that is, in the sixth embodiment, the chassis back plate 5 is quickly aligned by the left limiting stopper 311 and the right limiting stopper 312; after the chassis back panel 5 is positioned, the worker can clamp and fix the chassis back panel 5 by the left quick clamp 321 and the right quick clamp 322.

The seventh embodiment, as shown in fig. 2 and 5, is different from the sixth embodiment in that: backplate location centre gripping subassembly 3 is still including backplate locating pin mechanism 33, backplate locating pin mechanism 33 including the screw-on fastening in the locating pin mount pad 331 of fixed riser 2 rear surface, locating pin mounting hole 3311 that runs through completely around locating pin mount pad 331 offers, the embedded movable locating pin 332 that is equipped with of locating pin mounting hole 3311, the front end protrusion of movable locating pin 332 is in the front surface of fixed riser 2.

In addition, the positioning pin mounting seat 331 is screwed with a positioning pin limiting block 333 at the rear end side of the positioning pin mounting hole 3311, the positioning pin limiting block 333 is provided with a screw mounting hole 3331 aligned with the positioning pin mounting hole 3311 in the front-rear direction, and a limiting screw 334 screwed with the rear end of the movable positioning pin 332 is embedded in the screw mounting hole 3331 of the positioning pin limiting block 333.

In addition, a return spring 335 is fitted into the positioning pin mounting hole 3311, a front end portion of the return spring 335 abuts against the movable positioning pin 332, and a rear end portion of the return spring 335 abuts against the positioning pin mounting base 331.

It should be noted that the return spring 335 of the seventh embodiment can be abutted against the movable positioning pin 332 and the positioning pin mounting seat 331 in the following manner, specifically: the movable positioning pin 332 is provided with a positioning pin shoulder 3321 with a backward normal direction, the inner wall of the positioning pin mounting hole 3311 is provided with a mounting seat shoulder 3312, the reset spring 335 is sleeved on the periphery of the movable positioning pin 332, and the reset spring 335 is positioned between the positioning pin shoulder 3321 and the mounting seat shoulder 3312; the front end of the return spring 335 abuts the locating pin shoulder 3321 and the rear end of the return spring 335 abuts the mount shoulder 3312.

In the process of implementing the back plate positioning by the back plate positioning pin mechanism 33 of the seventh embodiment, the movable positioning pin 332 is matched with the corresponding positioning hole of the back plate 5 of the chassis, because the front end of the movable positioning pin 332 of the seventh embodiment protrudes out of the front surface of the fixed vertical plate 2, in the process of abutting the back plate 5 of the chassis against the front surface of the fixed vertical plate 2, the front end of the movable positioning pin 332 is inserted into the positioning hole of the back plate 5 of the chassis, so as to implement the positioning of the back plate 5 of the chassis.

In addition, the back plate positioning pin mechanism 33 of the seventh embodiment is similar to the elastic pin structure.

The eighth embodiment differs from the seventh embodiment in that: the fixed base 1 is respectively provided with a base through hole 11 which is completely penetrated up and down corresponding to each middle movable clamping plate 43, a movable top block which moves up and down relative to the fixed base 1 is respectively embedded in each base through hole 11, and the upper end part of each movable top block is provided with a top pushing inclined plane; the fixed base 1 is provided with ejector block driving mechanisms corresponding to the movable ejector blocks respectively, and the ejector block driving mechanisms are in driving connection with the corresponding movable ejector blocks.

Specifically, the method comprises the following steps: the ejector block driving mechanism comprises an ejector block driving cylinder which is screwed and fastened on the lower surface of the fixed base 1 and moves up and down, and the extending end part of a piston rod of the ejector block driving cylinder is connected with the lower end part of the movable ejector block.

In the eighth embodiment, in the use process, after the chassis rib plate 6 is placed between the middle movable clamping plate 43 and the left fixed clamping plate 41, the middle movable clamping plate 43 presses the chassis rib plate 6 under the elastic force of the elastic mechanism 44. After the middle movable clamping plate 43 compresses the chassis rib plate 6, the ejector block drives the cylinder to act and drives the movable ejector block to move upwards, in the process, the pushing inclined plane of the movable ejector block abuts against the lower end part of the middle movable clamping plate 43 and enables the middle movable clamping plate 43 to further compress the chassis rib plate 6 towards the left side, and therefore stable reliability of clamping of the chassis rib plate 6 during riveting operation is guaranteed.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and it is to be understood that the present invention is not limited to the above embodiments, but may be modified within the scope of the present invention.

Claims (10)

1. A tool clamp structure for riveting a machine case comprises a fixed base (1) and a fixed vertical plate (2) arranged on the fixed base (1), wherein a back plate positioning and clamping assembly (3) is arranged on the fixed vertical plate (2), and a plurality of rib plate positioning and clamping assemblies (4) which are sequentially arranged from left to right at intervals are arranged on the front end side of the fixed vertical plate (2) at the upper end of the fixed base (1);

the method is characterized in that: gusset location centre gripping subassembly (4) is including the fixed grip block (41) in the left side of unable adjustment base (1) upper surface of difference spiral shell dress fastening, right side erection support (42), left side fixed grip block (41) are located the left end side of right side erection support (42), and left side fixed grip block (41) and right side erection support (42) interval just to arranging, install middle activity grip block (43) between left side fixed grip block (41) and right side erection support (42), elastic mechanism (44) towards middle activity grip block (43) of left side elasticity top is installed in right side erection support (42).

2. The machine case riveting tooling clamp structure according to claim 1, which is characterized in that: the elastic mechanism (44) comprises at least two guide posts (441) horizontally extending along the left-right direction, and the left end parts of the guide posts (441) are fixedly screwed on the middle movable clamping plate (43) respectively;

the right mounting support (42) is provided with a guide sleeve (442) corresponding to each guide pillar (441), and the right end part of each guide pillar (441) is inserted into the central hole of the corresponding guide sleeve (442);

the middle part of each guide post (441) is sleeved with a compression spring (443), the left end part of the compression spring (443) is abutted against the middle movable clamping plate (43), and the right end part of the compression spring (443) is abutted against the corresponding guide sleeve (442).

3. The machine case riveting tooling clamp structure according to claim 2, wherein: the left end part and the right end part of the guide sleeve (442) are respectively sleeved with a limiting clamping ring (444), the limiting clamping ring (444) on the left side is located on the left end side of the right mounting support (42), the limiting clamping ring (444) on the right side is located on the right end side of the right mounting support (42), and the guide sleeve (442) is installed on the right mounting support (42) in a limiting mode through the two limiting clamping rings (444).

4. The machine case riveting tooling clamp structure according to claim 2, wherein: the guide post (441) is further sleeved with an auxiliary washer (445), the auxiliary washer (445) is located between the compression spring (443) and the guide sleeve (442), and the right end of the compression spring (443) is abutted to the auxiliary washer (445).

5. The machine case riveting tooling clamp structure according to claim 2, wherein: and a limit washer (446) is fixedly screwed on the right end part of the guide column (441), and the limit washer (446) is positioned on the right end side of the guide sleeve (442).

6. The machine case riveting tooling clamp structure according to claim 1, which is characterized in that: the backboard positioning and clamping assembly (3) comprises a left limit stop (311) and a right limit stop (312), the left limit stop (311) is screwed and fastened at the left end part of the front surface of the fixed vertical plate (2), and the right limit stop (312) is screwed and fastened at the right end part of the front surface of the fixed vertical plate (2);

the front surface of the fixed vertical plate (2) is provided with a left quick clamp (321) in the upper end side of the left limit stop (311) in a threaded manner, and the front surface of the fixed vertical plate (2) is provided with a right quick clamp (322) in the upper end side of the right limit stop (312) in a threaded manner.

7. A machine case is frock clamp structure for riveting according to claim 6, characterized in that: the backboard positioning and clamping assembly (3) further comprises a backboard positioning pin mechanism (33), the backboard positioning pin mechanism (33) comprises a positioning pin mounting seat (331) which is screwed and fastened on the rear surface of the fixed vertical plate (2), the positioning pin mounting seat (331) is provided with a positioning pin mounting hole (3311) which completely penetrates through the front and the rear, a movable positioning pin (332) is embedded in the positioning pin mounting hole (3311), and the front end part of the movable positioning pin (332) protrudes out of the front surface of the fixed vertical plate (2);

a positioning pin limiting block (333) is screwed on the rear end side of the positioning pin mounting hole (3311) of the positioning pin mounting seat (331), a screw mounting hole (3331) which is aligned with the positioning pin mounting hole (3311) in the front-back direction is formed in the positioning pin limiting block (333), and a limiting screw (334) which is screwed with the rear end part of the movable positioning pin (332) is embedded in the screw mounting hole (3331) of the positioning pin limiting block (333);

a return spring (335) is further embedded in the positioning pin mounting hole (3311), the front end of the return spring (335) is abutted against the movable positioning pin (332), and the rear end of the return spring (335) is abutted against the positioning pin mounting seat (331).

8. A machine case is frock clamp structure for riveting according to claim 7, characterized in that: the movable positioning pin (332) is provided with a positioning pin shoulder (3321) with a backward normal direction, the inner wall of the positioning pin mounting hole (3311) is provided with a mounting seat shoulder (3312), the reset spring (335) is sleeved on the periphery of the movable positioning pin (332), and the reset spring (335) is positioned between the positioning pin shoulder (3321) and the mounting seat shoulder (3312);

the front end of the return spring (335) is abutted against the positioning pin shoulder (3321), and the rear end of the return spring (335) is abutted against the mounting seat shoulder (3312).

9. The structure of a tool holder for riveting a machine case according to any one of claims 1 to 8, wherein: the fixed base (1) is provided with base through holes (11) which are completely penetrated up and down corresponding to the middle movable clamping plates (43), movable jacking blocks which move up and down relative to the fixed base (1) are embedded in the base through holes (11), and jacking inclined planes are arranged at the upper end parts of the movable jacking blocks;

the fixed base (1) is respectively provided with a top block driving mechanism corresponding to each movable top block, and the top block driving mechanisms are in driving connection with the corresponding movable top blocks.

10. The machine case riveting tooling clamp structure according to claim 9, wherein: the ejecting block driving mechanism comprises an ejecting block driving cylinder which is screwed and fastened on the lower surface of the fixed base (1) and moves up and down, and the extending end part of a piston rod of the ejecting block driving cylinder is connected with the lower end part of the movable ejecting block.

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