CN219214137U - Anti-static component riveting equipment for plastic uptake product - Google Patents

Abstract

The utility model relates to the technical field of automatic production equipment of plastic-sucking products, and discloses riveting equipment for antistatic components of plastic-sucking products, which comprises a positioning jig for positioning the products and the components and a riveting mechanism for moving and matching the positioning jig to finish riveting action, wherein a stripping carrier plate and a movable carrier plate are sequentially arranged below the positioning jig, a first horizontal driving mechanism for driving the positioning jig to move is arranged below the movable carrier plate, a stripping jacking plate is arranged at the outer side of the positioning jig at the upper end of the stripping carrier plate, an accurate positioning mechanism for positioning the movable carrier plate is arranged at the outer side of the movable carrier plate, and a stripping driving mechanism for driving the stripping jacking plate to jack and strip is arranged at the outer side of the stripping carrier plate. The riveting precision and the working efficiency are effectively improved, the riveting device can be used in an automatic assembly line, and the condition that automatic equipment cannot pick up due to clamping and laminating of products on a positioning jig after riveting can not occur.

Description

Anti-static component riveting equipment for plastic uptake product

Technical Field

The utility model relates to the technical field of automatic production equipment of plastic uptake products, in particular to riveting equipment for an antistatic part of a plastic uptake product.

Background

The plastic uptake product is widely applied to the packaging, production, storage and transfer of products and parts, effectively protects the products (or the parts of the products), generally overlaps each other in the use process, and places the products (or the parts of the products) in a limited space in a large amount. Along with the wide application of plastic uptake products, the specific requirements of corresponding plastic uptake products are higher and higher, the anti-static plastic uptake products need to be riveted on plastic uptake products in some high-requirement applications, the rivet is installed on the plastic uptake products in the prior art and is generally manually operated, the rivet is placed at the corresponding position on the riveting equipment by manpower, the punched plastic uptake products are manually placed on the corresponding jig of the riveting equipment for riveting, then the subsequent working procedure is carried out after the manual blanking, the plastic uptake products and the corresponding riveting jigs are clamped and attached in a large number of riveting processes, the whole riveting process is slow in speed and low in efficiency, and the precision of the processed products is unstable.

Disclosure of Invention

The utility model provides a plastic-sucking product anti-static component riveting device, which solves the technical problems of low manual operation speed, low efficiency and unstable precision of a processed product in the riveting process of the existing plastic-sucking product anti-static component.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides an antistatic component riveting equipment of plastic uptake product, includes the equipment box, be provided with the riveting mechanism that is used for location product and part's location tool and relative location tool removal cooperation to accomplish the riveting action in the equipment box, be provided with fixed base plate in the equipment box, fixed base plate is last to be provided with first horizontal actuating mechanism with riveting mechanism correspondence position, be provided with the removal carrier plate by its driven on the first horizontal actuating mechanism, be provided with on the removal carrier plate and take off the material carrier plate, the location tool is fixed on taking off the material carrier plate upper surface, the outside that takes off material carrier plate upper end location tool is provided with takes off the material jacking plate, the outside that removes the carrier plate on the fixed base plate is provided with the accurate positioning mechanism to removing the carrier plate location, the outside that takes off the material carrier plate is provided with the drive and takes off the material jacking plate jacking and take off the material actuating mechanism of taking off. The riveting precision and the working efficiency are effectively improved, the riveting device can be used in an automatic assembly line, and the condition that automatic equipment cannot pick up due to clamping and laminating of products on a positioning jig after riveting can not occur.

Further is: the left and right sides of remove the support plate corresponds and is provided with conical accurate locating hole, accurate positioning mechanism is including corresponding the removal positioning mechanism that sets up on fixed base plate removal support plate both sides and accurate locating hole correspond respectively, remove positioning mechanism and include second horizontal driving mechanism and by the accurate locating lever of the relative accurate locating hole horizontal migration of second horizontal driving mechanism drive, accurate locating lever orientation accurate locating hole one end is provided with the locating cone that matches with accurate locating hole. The second horizontal driving mechanism drives the positioning cone to be inserted into the conical accurate positioning hole, so that the correction can be gradually and accurately performed, the structure is simple, and the positioning is accurate.

Further is: the accurate positioning holes are formed in two sides of the movable carrier plate correspondingly, and each accurate positioning mechanism comprises a plurality of movable positioning mechanisms corresponding to the accurate positioning holes. In concrete implementation, a plurality of accurate locating holes and a plurality of removal positioning mechanism can carry out accurate location to removing the support plate in different positions respectively, can carry out automatic accurate location riveting to the plastic uptake product that has a plurality of antistatic parts that are located on a straight line, and the practicality is strong.

Further is: the material removing device comprises a material removing carrier plate, and is characterized in that a driving through hole penetrating horizontally is formed between the upper surface and the lower surface of the material removing carrier plate, a limiting groove for accommodating a material removing jacking plate is formed in the outer side of the upper surface positioning jig of the material removing carrier plate, the limiting groove is perpendicular to the horizontal direction of the driving through hole, a driving cavity communicated in the vertical direction is formed between the bottom of the limiting groove and the upper end of the driving through hole, a plurality of vertical limiting holes are formed in the outer side of the driving through hole at the bottom of the limiting groove, the material removing driving mechanism comprises material removing horizontal driving mechanisms which are respectively located at two sides of the driving through hole, each material removing horizontal driving mechanism comprises a third horizontal driving mechanism and a driving rod which is driven by the third horizontal driving mechanism to move horizontally relative to the driving through hole, a first driving inclined plane which is inclined towards one end of the driving through hole is formed in a position corresponding to the driving through hole, a transmission block which extends downwards into the driving through hole and can move freely upwards and downwards is formed in a position corresponding to the driving through hole, and the lower surface of the driving jacking plate is provided with a plurality of vertical driving inclined planes corresponding to the first driving inclined planes, and the limiting columns are arranged at the lower end of the transmission block, and the driving block is matched with the vertical positions of the first driving inclined planes and the corresponding to the vertical positions of the first driving inclined planes. Realize taking off the material to the jacking of the automation of plastic uptake product, improve work efficiency, avoid plastic uptake product and mould laminating inconvenient taking off after the riveting.

Further is: the limiting grooves are arranged on the outer sides of the positioning jigs on the upper surface of the stripping support plate in parallel, the stripping jacking plates are the same as the limiting grooves in number, the driving cavity is positioned on one side of the middle position of the bottom of the limiting grooves, the other side of the middle position of the bottom of the limiting grooves is provided with a standby cavity which is downwards concave to accommodate the transmission block, the vertical projection of the driving cavity and the vertical projection of the standby cavity are centrally symmetrical in the vertical projection of the limiting grooves, the center symmetry of a plurality of vertical direction spacing holes sets up in spacing recess bottom, take off a plurality of vertical spacing posts of material jacking plate bottom and a plurality of vertical direction spacing holes one-to-one, take off the transmission piece of material jacking plate lower surface and drive the cavity and correspond with reserve cavity with take off the rotatory back transmission piece of material jacking plate one hundred eighty degrees around the center. The applicability is strong, and the jacking stripping can be correspondingly carried out on the plastic suction products on the positioning jigs with different sizes.

Further is: the utility model discloses a material lifting device, including spacing recess, screw rod, nut, connecting slide bar and connecting slide bar, the spacing recess bottom is provided with first anti-jump screw hole, take off the material lifting plate upper surface and first anti-jump screw hole correspond the position and be provided with first anti-jump cavity, the bottom of first anti-jump cavity is provided with the second anti-jump cavity with first anti-jump screw hole corresponds the position, be provided with the lower extreme in the first anti-jump cavity and prevent jumping the bolt that the cavity is located first anti-jump screw hole through the second anti-jump, the nut is located first anti-jump cavity and external diameter is less than the internal diameter of first anti-jump cavity, the external diameter of nut is greater than the internal diameter of second anti-jump cavity, the external diameter of screw bar is less than the internal diameter of second anti-jump cavity, the screw column is located first anti-jump screw hole and matches with first anti-jump screw hole. The material-removing jacking plate is effectively prevented from lifting and jumping in the jacking process.

Drawings

FIG. 1 is a schematic front view of the present utility model;

FIG. 2 is a schematic cross-sectional view of the corresponding structure of the drive rod and stripper jack;

FIG. 3 is a schematic top view of the limiting groove;

fig. 4 is a schematic front view of a stripper jack

Fig. 5 is a schematic cross-sectional view of a jump-proof bolt portion.

Marked in the figure as: the equipment box 100, the fixed base plate 101, the first horizontal driving mechanism 110, the movable carrier plate 120, the stripping carrier plate 130, the driving through hole 131, the limiting groove 132, the driving cavity 133, the vertical limiting hole 134, the standby cavity 135, the first anti-jump threaded hole 136, the stripping jacking plate 140, the transmission block 141, the second driving inclined plane 142, the vertical limiting column 143, the first anti-jump cavity 144, the second anti-jump cavity 145, the anti-jump bolt 146, the positioning jig 200, the riveting mechanism 300, the accurate positioning mechanism 400, the stripping driving mechanism 500, the driving rod 510 and the first driving inclined plane 511.

Detailed Description

The utility model is further described below with reference to the drawings and the detailed description.

The riveting equipment for the anti-static component of the plastic suction product shown in fig. 1 comprises an equipment box body 100, a positioning jig 200 for positioning the product and the component and a riveting mechanism 300 for completing the riveting action in a moving fit manner relative to the positioning jig 200 are arranged in the equipment box body 100, a fixed substrate 101 is arranged in the equipment box body 100, a first horizontal driving mechanism 110 is arranged at a position, corresponding to the riveting mechanism 300, on the fixed substrate 101, a movable carrier plate 120 driven by the first horizontal driving mechanism 110 is arranged, a stripping carrier plate 130 is arranged on the movable carrier plate 120, the positioning jig 200 is fixed on the upper surface of the stripping carrier plate 130, a stripping jacking plate 140 is arranged at the outer side of the positioning jig 200 at the upper end of the stripping carrier plate 130, a precise positioning mechanism 400 for positioning the movable carrier plate 120 is arranged at the outer side of the fixed substrate 101, and a stripping driving mechanism 500 for driving the stripping jacking plate 140 is arranged at the outer side of the stripping carrier plate 130 on the fixed substrate 101. In this embodiment, the first horizontal driving mechanism 110 is a linear motor, and in an implementation, the first horizontal driving mechanism 110 may also be a linear driving mechanism such as a cylinder with controllable stroke; in a specific implementation, the riveting component can be firstly placed in the riveting cavity of the positioning jig 200 by automatic equipment or an operator, then the plastic uptake product (in this specific embodiment, the antistatic rivet of the antistatic plastic uptake tray is processed) is placed on the positioning jig 200 by the automatic equipment or the operator, the first horizontal driving mechanism 110 drives the movable carrier plate 120 to transfer the positioning jig 200 to the corresponding riveting position through the stripper carrier plate 130, the precise positioning mechanism 400 further precisely positions the movable carrier plate 120, the riveting mechanism 300 downwards moves to match with the positioning jig 200 to finish riveting of the product and the component, after the riveting is finished, the first horizontal driving mechanism 110 drives the movable carrier plate 120 to transfer the positioning jig 200 to the initial feeding position through the stripper carrier plate 130, the stripper lifting plate 140 is matched with the outer side edge of the product to lift the product, the product is separated from the positioning jig 200, the automatic equipment or the manually removes the pressed product, and the automatic equipment is effectively avoided to clamp the product after the riveting is finished, the automatic equipment is clamped on the positioning jig 200, the efficiency is not convenient to be conveniently removed, or the equipment cannot be picked up by the operator. The riveting precision and the working efficiency are effectively improved, the riveting device can be used in an automatic assembly line, and the condition that automatic equipment cannot pick up due to clamping and laminating of products on the positioning jig 200 after riveting can not occur.

On the basis of the above, as shown in fig. 1, the left and right sides of the mobile carrier plate 120 are correspondingly provided with conical precise positioning holes, the precise positioning mechanism 400 comprises mobile positioning mechanisms which are respectively and correspondingly arranged on the fixed substrate 101 and correspond to the precise positioning holes on both sides of the mobile carrier plate 120, each mobile positioning mechanism comprises a second horizontal driving mechanism and a precise positioning rod which is driven by the second horizontal driving mechanism to horizontally move relative to the precise positioning hole, and a positioning cone matched with the precise positioning hole is arranged on one end of each precise positioning rod towards the precise positioning hole. In this embodiment, the second horizontal driving mechanism is a cylinder, and in the implementation, the second horizontal driving mechanism may also be a linear driving mechanism such as a linear motor; the second horizontal driving mechanism drives the positioning cone to be inserted into the conical accurate positioning hole, the insertion is not blocked, and when the movable carrier plate 120 has errors, the second horizontal driving mechanism drives the positioning cone to be inserted into the conical accurate positioning hole, so that the gradual accurate deviation correction can be realized. Simple structure, accurate location.

On the basis of the above, as shown in fig. 1, the two sides of the movable carrier 120 are provided with a plurality of corresponding precise positioning holes, and the precise positioning mechanism 400 includes a plurality of movable positioning mechanisms corresponding to the precise positioning holes. In specific implementation, a plurality of accurate locating holes and a plurality of movable locating mechanisms can respectively carry out accurate location to the movable carrier plate 120 in different positions, can carry out automatic accurate location riveting to the plastic uptake product that has a plurality of antistatic parts that are located on a straight line, and the practicality is strong.

On the basis of the above, as shown in fig. 1 and fig. 2, a driving through hole 131 penetrating horizontally is provided between the upper surface and the lower surface of the stripper carrier 130, a limit groove 132 for accommodating the stripper jack-up plate 140 is provided on the outer side of the upper surface positioning jig 200 of the stripper carrier 130, the limit groove 132 is perpendicular to the horizontal direction of the driving through hole 131, a driving cavity 133 communicating vertically is provided between the bottom of the limit groove 132 and the upper end of the driving through hole 131, a plurality of vertical limit holes 134 are provided on the outer side of the bottom driving through hole 131 of the limit groove 132, the stripper drive mechanism 500 comprises a stripper horizontal drive mechanism located at two sides of the driving through hole 131 respectively, the stripper horizontal drive mechanism comprises a third horizontal drive mechanism and a drive rod 510 driven by the third horizontal drive mechanism to move horizontally relative to the driving through hole 131, a first driving inclined surface 511 is provided at one end of the drive rod 510 facing the driving through hole 131, a plurality of vertical limit blocks 133 are provided on the lower surface of the stripper jack-up plate 140 corresponding to the driving cavity, and the lower surface of the second inclined surface 133 is matched with the vertical limit block 141 in the vertical direction, and the lower end of the second inclined surface 141 is matched with the vertical limit block 141. In this embodiment, the third horizontal driving mechanism is a linear motor, and in the implementation, the third horizontal driving mechanism may also be a linear driving mechanism such as a cylinder with controllable stroke; in a specific implementation, when the third horizontal driving mechanism drives the driving rod 510 to move towards the driving through hole 131, after the first driving inclined surface 511 on the driving rod 510 is abutted against the second driving inclined surface 142, the driving block 141 can be pushed to lift the stripping and lifting plate 140 upwards, and in the process that the stripping and lifting plate 140 is lifted, the vertical limiting column 143 can only move in the vertical direction limiting hole 134, namely, the limiting effect on the stripping and lifting plate 140 is achieved, so that the stripping and lifting plate 140 can only move in the vertical direction; the transmission block 141 can freely move in the driving through hole 131, and the stripping lifting plate 140 automatically resets under the action of gravity after the third horizontal driving mechanism drives the driving rod 510 to be far away from the driving through hole 131; through the conversion that agrees with the inclined plane with the horizontal direction removal change into vertical direction removal, realize taking off the material to the jacking of the automation of plastic uptake product, improve work efficiency, avoid after the riveting plastic uptake product and mould laminating inconvenient taking off.

On the basis of the above, as shown in fig. 1 to 4, the limiting grooves 132 are multiple and are arranged on the outer side of the positioning jig 200 on the upper surface of the stripping carrier plate 130 in parallel, the number of the stripping jacking plates 140 is the same as that of the limiting grooves 132, the driving cavity 133 is located on one side of the middle position of the bottom of the limiting grooves 132, the standby cavity 135 for containing the driving block 141 in a downward concave manner is arranged on the other side of the middle position of the bottom of the limiting grooves 132, the vertical projection of the driving cavity 133 and the vertical projection of the standby cavity 135 are centrally symmetrical in the vertical projection of the limiting grooves 132, the multiple vertical limiting columns 143 on the bottom of the stripping jacking plates 140 are centrally symmetrical in the bottom of the limiting grooves 132, the driving block 141 on the lower surface of the stripping jacking plates 140 corresponds to the driving cavity 133, and the driving block 141 corresponds to the standby cavity 135 after the stripping jacking plates 140 rotate about one hundred eighty degrees around the center. In a specific implementation, a suitable corresponding stripping and lifting plate 140 can be selected according to the size of the plastic product and the corresponding positioning jig 200, the rest of the stripping and lifting plates 140 are rotated by one hundred eighty degrees and then the transmission blocks 141 are correspondingly arranged in the standby cavity 135, at this time, the rest of the stripping and lifting plates 140 and the corresponding positions of the driving cavities 133 do not extend into the driving through holes 131, that is, the movement of the driving rods 510 in the driving through holes 131 does not affect the stripping and lifting plates 140, only the selected corresponding stripping and lifting plates 140 play a lifting driving role, the relation between the limiting grooves 132 and the corresponding stripping and lifting plates 140 which are arranged in parallel can be adjusted through rotation installation, the applicability is strong, and the corresponding lifting and lifting can be performed on the plastic product on the positioning jig 200 with different sizes.

On the basis of the above, as shown in fig. 3 to 5, a first anti-jump threaded hole 136 is formed in the bottom of the limiting groove 132, a first anti-jump cavity 144 is formed in a position, corresponding to the first anti-jump threaded hole 136, of the upper surface of the stripping jacking plate 140, a second anti-jump cavity 145 is formed in a position, corresponding to the first anti-jump threaded hole 136, of the bottom of the first anti-jump cavity 144, an anti-jump bolt 146 with the lower end located in the first anti-jump threaded hole 136 through the second anti-jump cavity 145 is arranged in the first anti-jump cavity 144, the anti-jump bolt 146 comprises a nut, a connecting slide bar and a threaded column, the nut is located in the first anti-jump cavity 144 and has an outer diameter smaller than the inner diameter of the first anti-jump cavity 144, the outer diameter of the nut is larger than the inner diameter of the second anti-jump cavity 145, the connecting slide bar is located in the first anti-jump cavity 144 and the second anti-jump cavity 145, the outer diameter of the connecting slide bar is smaller than the inner diameter of the second anti-jump cavity 145, the threaded column is smaller than the inner diameter of the second anti-jump cavity 145, and the threaded column is located in the first anti-jump cavity 136 and is matched with the first anti-jump threaded hole 136. In a specific implementation, when the stripping and jacking plate 140 moves up in opposite directions to the contact of the upper end of the second anti-jump cavity 145 and the lower end of the nut, the outer diameter of the nut is larger than the inner diameter of the second anti-jump cavity 145, so that the stripping and jacking plate 140 is limited and cannot move up continuously, the second anti-jump cavity 145 can only slide between the nut and the first anti-jump threaded hole 136, the lifting distance of the stripping and jacking plate 140 can be effectively limited in the jacking process, and the condition that the stripping and jacking plate 140 flies upwards in the jacking process is effectively prevented.

While the foregoing is directed to embodiments of the present utility model, other and further details of the utility model may be had by the present utility model, it should be understood that the foregoing description is merely illustrative of the present utility model and that no limitations are intended to the scope of the utility model, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the utility model.

Claims (6)

1. The utility model provides a plastic uptake product prevents static part riveting equipment, includes equipment box (100), be provided with in equipment box (100) and be used for location product and part's positioning jig (200) and relative positioning jig (200) remove cooperation and accomplish riveting mechanism (300) of riveting action, its characterized in that: the device comprises a device box body (100), wherein a fixed substrate (101) is arranged in the device box body (100), a first horizontal driving mechanism (110) is arranged at a position, corresponding to a riveting mechanism (300), on the fixed substrate (101), a movable carrier plate (120) driven by the first horizontal driving mechanism is arranged on the first horizontal driving mechanism (110), a stripping carrier plate (130) is arranged on the movable carrier plate (120), a positioning jig (200) is fixed on the upper surface of the stripping carrier plate (130), a stripping jacking plate (140) is arranged on the outer side of the positioning jig (200) at the upper end of the stripping carrier plate (130), a precise positioning mechanism (400) for positioning the movable carrier plate (120) is arranged on the outer side of the movable carrier plate (120) on the fixed substrate (101), and a stripping driving mechanism (500) for driving the stripping jacking plate (140) to jack up and off materials is arranged on the outer side of the fixed substrate (101).

2. The anti-static component riveting device for plastic sucking products according to claim 1, wherein: the left and right sides of remove carrier plate (120) corresponds and is provided with conical accurate locating hole, accurate positioning mechanism (400) is including corresponding the removal positioning mechanism that sets up on fixed base plate (101) removal carrier plate (120) both sides and accurate locating hole correspond respectively, remove positioning mechanism and include second horizontal driving mechanism and by the accurate locating lever of the relative accurate locating hole horizontal migration of second horizontal driving mechanism drive, accurate locating lever orientation accurate locating hole one end is provided with the locating cone that matches with accurate locating hole.

3. The anti-static component riveting device for plastic sucking products according to claim 2, wherein: the accurate positioning holes are formed in the two sides of the movable carrier plate (120) correspondingly, and the accurate positioning mechanism (400) comprises a plurality of movable positioning mechanisms corresponding to the accurate positioning holes.

4. A vacuum forming product antistatic component riveting apparatus according to claim 1 or claim 3, wherein: a driving through hole (131) penetrating the upper surface and the lower surface of the stripping carrier plate (130) horizontally is arranged between the upper surface and the lower surface of the stripping carrier plate (130), a limiting groove (132) for accommodating the stripping jacking plate (140) is arranged on the outer side of the upper surface positioning jig (200) of the stripping carrier plate (130), the limiting groove (132) is perpendicular to the horizontal direction of the driving through hole (131), a driving cavity (133) communicated in the vertical direction is arranged between the bottom of the limiting groove (132) and the upper end of the driving through hole (131), a plurality of vertical limiting holes (134) are arranged on the outer side of the driving through hole (131) at the bottom of the limiting groove (132), the stripping driving mechanism (500) comprises a stripping horizontal driving mechanism which is respectively arranged on two sides of the driving through hole (131), the stripping horizontal driving mechanism comprises a third horizontal driving mechanism and a driving rod (510) which is driven by the third horizontal driving through hole (131) to move horizontally, the driving rod (510) is arranged towards one end of the driving through hole (131) and is provided with a first inclined surface (131) which is inclined downwards, the stripping driving mechanism can extend to the upper surface (141) of the stripping carrier plate (131) correspondingly to the lower surface (141), the lower extreme of transmission piece (141) is provided with second drive inclined plane (142) that agree with first drive inclined plane (511), the lower surface of taking off material jacking board (140) all is provided with vertical spacing post (143) that match with vertical spacing hole (134) with a plurality of vertical spacing hole (134) corresponding positions.

5. The vacuum forming product antistatic component riveting equipment according to claim 4, wherein: the utility model discloses a material lifting device, including spacing recess (132), drive cavity (133), drive cavity (140) and backup cavity (141), drive cavity (133) have a plurality of and set up in the outside of taking off material support plate (130) upper surface location tool (200) side by side, take off material lifting plate (140) and spacing recess (132) quantity the same, drive cavity (132) bottom intermediate position's one side is located, spacing recess (132) bottom intermediate position's opposite side is provided with downward concave reserve cavity (135) that hold transmission piece (141), the vertical direction projection of drive cavity (133) and the vertical direction projection of backup cavity (135) are in the vertical direction projection of spacing recess (132) central symmetry, a plurality of vertical direction spacing holes (134) central symmetry set up in spacing recess (132) bottom, take off a plurality of vertical spacing posts (143) and a plurality of vertical direction spacing holes (134) of material lifting plate (140) bottom one-to-one, take off transmission piece (141) and drive cavity (133) lower surface one hundred degrees rotation back and eight cavities (141) around center.

6. The vacuum forming product antistatic component riveting equipment according to claim 4, wherein: limiting groove (132) bottom is provided with first anti-jump screw hole (136), take off material jacking board (140) upper surface and first anti-jump screw hole (136) corresponding position are provided with first anti-jump cavity (144), the bottom of first anti-jump cavity (144) is provided with second anti-jump cavity (145) with first anti-jump screw hole (136) corresponding position, first anti-jump cavity (144) internal is provided with the lower extreme and is located first anti-jump screw bolt (146) of anti-jump screw hole (136) through second anti-jump cavity (145), anti-jump screw bolt (146) include the nut, connect slide bar and screw thread post, the nut is located first anti-jump cavity (144) and external diameter is less than the internal diameter of first anti-jump cavity (144), the external diameter of nut is greater than the internal diameter of second anti-jump cavity (145), connect and be located first anti-jump cavity (144) and second anti-jump cavity (145) internal diameter and external diameter of second anti-jump cavity (145), the external diameter of screw thread post is less than first anti-jump cavity (136) and the internal diameter of first anti-jump cavity (145) is located first anti-jump screw hole (136).

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