Sliding block type linkage automatic centering device

Abstract

The utility model discloses a sliding block type linkage automatic centering device which comprises a clamp body (3), a transmission rod bolt (5), a transmission rod (7), a linkage block (13), a first-shaft bearing hole thrust cone shaft (26), a second-shaft bearing hole thrust cone shaft (19), a first-shaft sliding positioning block (27) and a second-shaft sliding positioning block (18). According to the device, clamping force applied by screwing a transmission rod bolt (5) into a clamp body (3) is transmitted to a linkage mechanism of a linkage block (13) through a lever mechanism of a transmission rod (7), so that a one-shaft bearing hole thrust cone shaft (26) and a two-shaft bearing hole thrust cone shaft (19) integrally move upwards to drive three one-shaft sliding positioning blocks (27) and two two-shaft sliding positioning blocks (18) to be linked; positioning and clamping are completed in an automatic centering mode. According to the utility model, the error caused by non-coincidence of the positioning reference and the design reference is solved, the clamping and positioning are reliable, the operation is convenient, and higher position accuracy is easy to obtain.

Description

Technical Field

[0001] The utility model relates to the field of automobile parts installation and positioning devices, in particular to a slide block type linkage automatic centering device. Background Art

[0002] The existing commercial vehicle gearbox middle shell design datum is the first axis bearing hole and the second axis bearing hole. During the processing, the assembly positioning pin is usually selected for positioning. The resulting positioning datum is inconsistent with the design datum, resulting in a large positioning error. As a result, a solution of using an automatic centering tapered shaft for progressive tightening in sequence has emerged. However, during operation, when one of the holes is fixed, the workpiece cannot rotate, causing the other hole to be virtually positioned, resulting in an angular error, and the position requirement cannot be guaranteed. Summary of the invention

[0003] The utility model provides a slider type linkage automatic centering device to solve the problems existing in the prior art. The utility model mainly sets a lever linkage mechanism. When positioning with the design reference hole (one-axis bearing hole and two-axis bearing hole) of the middle shell of the commercial vehicle gearbox, the linkage of the slider is pushed by two thrust cone shafts to realize automatic centering.

[0004] In order to solve the above technical problems, the technical solution of the utility model is as follows: a slider type linkage automatic centering device, comprising a fixture body, a pressed threaded sleeve is provided on the fixture body, a transmission rod bolt is connected in the threaded sleeve, the transmission rod bolt is connected to one end of the transmission rod in a floating manner through a steel ball screw, the bottom of the fixture body is connected to a transmission rod support, the middle part of the transmission rod is connected to the transmission rod support through a transmission rod rotating shaft, the transmission rod uses the transmission rod rotating shaft as a lever fulcrum, thereby forming a lever structure; the other end of the transmission rod is connected to the middle part of a linkage block in a floating manner through a steel ball installed in a transmission rod ball socket, one end of the linkage block is connected to the thrust cone shaft of a first axis bearing hole in a floating manner through a first axis connecting rod, and the other end of the linkage block is connected to the thrust cone shaft of a second axis bearing hole in a floating manner through a second axis connecting rod;

[0005] A first-axis positioning support and a second-axis positioning support are installed on the fixture body. The thrust cone shaft of the first-axis bearing hole is guided in the vertical direction in the center hole of the first-axis positioning support. The upper end surface of the first-axis positioning support is provided with a plurality of first-axis positioning support slider guide grooves evenly distributed along the circumferential direction. A plurality of first-axis sliding positioning blocks are slidably connected in the first-axis positioning support slider guide groove. The upper end conical surface of the thrust cone shaft of the first-axis bearing hole contacts the inner ends of the plurality of first-axis sliding positioning blocks. A first-axis thrust cone shaft cover plate is fixed on the first-axis positioning support; the second-axis The thrust cone shaft of the bearing hole is guided in the vertical direction in the center hole of the two-axis positioning support. The upper end surface of the two-axis positioning support is provided with a plurality of two-axis positioning support slider guide grooves evenly distributed along the circumferential direction. A plurality of two-axis sliding positioning blocks are slidably connected in the two-axis positioning support slider guide groove. The upper end conical surface of the thrust cone shaft of the two-axis bearing hole contacts the inner ends of a plurality of secondary axis sliding positioning blocks. A two-axis thrust cone shaft cover plate is fixed on the two-axis positioning support. The outer ends of the one-axis sliding positioning block and the two-axis sliding positioning block are clamping positioning ends.

[0006] In order to further solve the above technical problems, a ball socket is processed at the other end of the transmission rod, and a floating connection is achieved by the steel ball in the ball socket contacting the upper surface of the square hole in the middle of the linkage block; above the linkage block there is a linkage block guide support fixed on the fixture body, and the linkage block is located in the guide groove of the linkage block guide support, providing precise guidance for the movement of the linkage block in the up and down directions.

[0007] In order to further solve the above technical problems, in the slider-type linkage automatic centering device provided by the utility model, the screw hole of the one-axis connecting rod on the linkage block is threadedly connected with the one-axis connecting rod, and the T-shaped head of the one-axis connecting rod is inserted into the bottom T-shaped groove of the thrust cone shaft of the one-axis bearing hole to realize a floating connection; the screw hole of the second-axis connecting rod on the linkage block is threadedly connected with the second-axis connecting rod, and the T-shaped head of the second-axis connecting rod is inserted into the bottom T-shaped groove of the thrust cone shaft of the second-axis bearing hole to realize a floating connection.

[0008] In order to further solve the above technical problems, the utility model provides a slider type linkage automatic centering device, one axis sliding positioning block has three pieces, with an included angle of 120 º Evenly distributed, there are two two-axis sliding positioning blocks, with an angle of 180 º Symmetrical and even distribution.

[0009] In order to further solve the above-mentioned technical problems, in the slider-type linkage automatic centering device provided by the utility model, a one-axis tension spring connecting rod is fixed on each one-axis sliding positioning block, and the Y-shaped tension spring structure is composed of three one-axis tension springs, that is, one end of the three one-axis tension springs are fixedly connected together, and the other ends are respectively hung on the three one-axis tension spring connecting rods, providing a retraction tension for the one-axis sliding positioning block; a two-axis tension spring connecting rod is fixed on each two-axis sliding positioning block, and a two-axis tension spring is respectively hung on two two-axis tension spring connecting rods, providing a retraction tension for the two-axis sliding positioning block.

[0010] The beneficial effect of the utility model is that after the utility model adopts such a lever linkage mechanism, the two thrust cone shafts are linked and the sliding positioning block is driven to automatically center, thereby realizing reliable positioning of the middle shell of the commercial vehicle gearbox, solving the error caused by the misalignment of the positioning reference and the design reference, and the clamping positioning is reliable, the operation is convenient, and the high position accuracy requirement is easily achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the gearbox housing of a commercial vehicle;

[0012] Figure 2 This is a schematic diagram of the main structure of a slider-type linkage automatic centering device of the utility model;

[0013] Figure 3 yes Figure 2 Sectional view along AA;

[0014] Figure 4 This is a schematic diagram of the positioning structure of the positioning fixture body of the utility model;

[0015] Figure 5 The utility model mainly relates to a connection diagram between a transmission rod bolt, a transmission rod, a linkage block, a linkage block guide support, a first-axis bearing hole thrust cone shaft, and a second-axis bearing hole thrust cone shaft.

[0016] As shown in the figure: 1. One-axis bearing hole; 2. Two-axis bearing hole; 3. Clamp body; 4. Flat steel ball screw; 5. Transmission rod bolt; 6. Threaded sleeve; 7. Transmission rod; 8. Transmission rod shaft; 9. Transmission rod support; 10. Linkage block guide support; 11. Two-axis connecting rod; 12. Two-axis connecting rod screw hole; 13. Linkage block; 14. Steel ball; 15. Compression spring; 16. One-axis connecting rod screw hole; 17. One-axis connecting rod; 18. Two-axis sliding positioning block; 19. Two-axis bearing hole push rod force cone shaft; 20, second axis tension spring; 21, second axis tension spring connecting rod; 22, second axis thrust cone shaft cover plate; 23, first axis thrust cone shaft cover plate; 24, first axis tension spring connecting rod; 25, first axis tension spring; 26, first axis bearing hole thrust cone shaft; 27, first axis sliding positioning block, 28, first axis positioning support; 29, second axis positioning support; 30, second axis positioning support center hole; 31, first axis positioning support center hole; 32, second axis positioning support slider guide groove; 33, first axis positioning support slider guide groove. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings, but this embodiment should not be understood as a limitation to the present invention.

[0018] Example 1: Figure 2-Figure 5As shown, a slider-type linkage automatic centering device comprises a fixture body 3, on which is provided a pressed-in threaded sleeve 6, a transmission rod bolt 5 is connected in the threaded sleeve 6, and the transmission rod bolt 5 is floatingly connected to one end of a transmission rod 7 through a steel ball screw 4, wherein the structure of the steel ball screw 4 is that one end is a screw, which is fixed to one end of the transmission rod 7, and a ball socket is processed in the screw head at the other end of the screw, and a movable steel ball is embedded in the ball socket; the other end of the transmission rod 7 is processed with a ball socket, and a floating connection is achieved by contacting the upper surface of the square hole in the middle of the linkage block 13 through the steel ball 14 in the ball socket, and a linkage block guide support 10 fixed to the fixture body 3 is provided above the linkage block 13, and the linkage block 13 is located in the guide groove of the linkage block guide support 10, so as to provide precise guidance for the movement of the linkage block 13 in the up and down directions; a transmission rod support 9 is fixedly connected to the bottom of the fixture body 3 by screws (or welding or bonding is also possible), and the transmission The rod 7 is connected to the transmission rod support 9 through the transmission rod rotating shaft 8, and the transmission rod 7 uses the transmission rod rotating shaft 8 as a lever fulcrum to form a lever structure; a single-axis connecting rod screw hole 16 and a second-axis connecting rod screw hole 12 are respectively processed on the linkage block 13, and the single-axis connecting rod screw hole 16 on the linkage block 13 is threadedly connected with the single-axis connecting rod 17, and the T-shaped head of the single-axis connecting rod 17 is inserted into the bottom T-shaped groove of the thrust cone shaft 26 of the single-axis bearing hole to form a movable gap to achieve a floating connection, and the second-axis connecting rod screw hole 12 on the linkage block 13 is threadedly connected with the second-axis connecting rod 11, and the T-shaped head of the second-axis connecting rod 11 is inserted into the bottom T-shaped groove of the thrust cone shaft 19 of the second-axis bearing hole to form a movable gap to achieve a floating connection, and the linkage block 13 forms a linkage structure with the single-axis bearing hole thrust cone shaft 26 and the second-axis bearing hole thrust cone shaft 19;

[0019] The fixture body is provided with a first axis positioning support 28 and a second axis positioning support 29. The center of the first axis positioning support 28 is provided with a center hole 31 of the first axis positioning support. The first axis bearing hole thrust cone shaft 26 is guided in the center hole 31 of the first axis positioning support in the vertical direction. The upper end surface of the first axis positioning support is provided with a 。 Three one-axis positioning support slider guide grooves 33 are evenly distributed in the circumferential direction, and each one-axis positioning support slider guide groove is slidably connected to a one-axis sliding positioning block 27, and the upper end conical surface of the one-axis bearing hole thrust cone shaft contacts the inner end of the one-axis sliding positioning block 27, and the one-axis thrust cone shaft cover plate 23 is fixed on the one-axis positioning support 28; the center of the two-axis positioning support 29 has a two-axis positioning support center hole 30, and the two-axis bearing hole thrust cone shaft 19 is guided in the vertical direction in the one-axis positioning support center hole 31, and the upper end surface of the two-axis positioning support 29 is provided with a two-axis positioning support center hole 30 with an angle of 180 。Two two-axis positioning support slider guide grooves 32 are horizontally distributed in the circumferential direction, and a two-axis sliding positioning block 18 is slidably connected in each two-axis positioning support slider guide groove. The upper end conical surface of the two-axis bearing hole thrust cone shaft 19 contacts the inner end of the two-axis sliding positioning block 18, and a two-axis thrust cone shaft cover plate 22 is fixed on the two-axis positioning support 29. The outer ends of the one-axis sliding positioning block 27 and the two-axis sliding positioning block 18 are clamping positioning ends.

[0020] The structure of "the transmission rod bolt 5 is floatingly connected to one end of the transmission rod 7" involved in Example 1 is an optimized implementation of the present utility model, and other structures for achieving floating connection in the prior art are also suitable for the present utility model.

[0021] The structure of "the other end of the transmission rod 7 is floatingly connected to the middle part of a linkage block 13" involved in Example 1 is an optimized implementation of the present utility model, and other structures for achieving floating connection in the prior art are also suitable for the present utility model.

[0022] The structure involved in Example 1 that "one end of the linkage block 13 is floatingly connected upward to the thrust cone shaft 26 of the first-axis bearing hole through the first-axis connecting rod 17, and the other end of the linkage block 13 is floatingly connected upward to the thrust cone shaft 19 of the second-axis bearing hole through the second-axis connecting rod 11;" is an optimized implementation method of the utility model, and other structures in the prior art that achieve floating connection through connecting rods are also suitable for the utility model.

[0023] Example 2: Figure 3 As shown, a single-axis tension spring connecting rod 24 is fixed to each single-axis sliding positioning block 27, and a Y-shaped tension spring structure is composed of three single-axis tension springs 25, that is, one end of the three single-axis tension springs 25 is fixedly connected together, and the other end is respectively hung on the three single-axis tension spring connecting rods 24, providing a retraction tension for the single-axis sliding positioning block 27. A two-axis tension spring connecting rod 21 is fixed to each two-axis sliding positioning block 18, and a two-axis tension spring 20 is respectively hung on two two-axis tension spring connecting rods 21, providing a retraction tension for the two-axis sliding positioning block 18.

[0024] The structure described in Example 2 is not essential to the present invention; the purpose of the present invention can be achieved by eliminating this structure, but it is inconvenient to install and remove parts (commercial vehicle gearbox middle shell) in a non-working state because the first-axis sliding positioning block 27 and the second-axis sliding positioning block 18 are in a free state.

[0025] The utility model Figure 1 The figure shows the middle case of a commercial vehicle gearbox, on which there are a first-axis bearing hole 1 and a second-axis bearing hole 2.

[0026] The utility model Figure 4The figure shows the fixture body 3 of the device of the utility model, on which the gearbox middle shell of a commercial vehicle is positioned and clamped, wherein the first-axis bearing hole 1 is automatically centered by three first-axis sliding positioning blocks 27, and the second-axis bearing hole 2 is automatically centered by two second-axis sliding positioning blocks 18.

[0027] Working principle of the utility model: When in use, the transmission rod bolt 5 is screwed into the clamp body 3 to generate a clamping force, and the clamping force causes the transmission rod 7 in the lever structure to rotate around the transmission rod rotating shaft 8 on the transmission rod support 9, so that the steel ball 14 in the ball socket of the transmission rod 7 pushes the linkage block 13 in the linkage block guide support 10 upward, and the linkage block 13 pushes the thrust cone shaft 26 of the first axis bearing hole and the thrust cone shaft 19 of the second axis bearing hole upward in the linkage structure, and drives the three first axis sliding positioning blocks 27 and the two second axis sliding positioning blocks 18 to extend outward to the workpiece positioning hole, so as to realize linkage automatic centering. When the transmission rod bolt 5 is loosened, the linkage block 13 moves downward under the action of the compression spring 15, driving the thrust cone shaft 26 of the first axis bearing hole and the thrust cone shaft 19 of the second axis bearing hole to move downward, and the three evenly distributed first axis sliding positioning blocks 27 and the two second axis sliding positioning blocks 18 retract under the action of the first axis tension spring 25 and the second axis tension spring 20, respectively.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A slider-type linkage automatic centering device, comprising a clamp body (3), characterized in that: A pressed threaded sleeve (6) is provided on the fixture body (3), a transmission rod bolt (5) is connected in the threaded sleeve (6), the transmission rod bolt (5) is floatingly connected to one end of the transmission rod (7) through a steel ball screw (4), the bottom of the fixture body (3) is connected to a transmission rod support (9), the middle part of the transmission rod (7) is connected to the transmission rod support (9) through a transmission rod rotating shaft (8), and the transmission rod (7) uses the transmission rod rotating shaft (8) as a lever fulcrum, thereby forming a lever structure; the other end of the transmission rod (7) is floatingly connected to the middle part of the linkage block (13) through a steel ball (14) installed in the transmission rod ball socket, one end of the linkage block (13) is floatingly connected upward to the thrust cone shaft (26) of the first shaft bearing hole through the first shaft connecting rod (17), and the other end of the linkage block (13) is floatingly connected upward to the thrust cone shaft (19) of the second shaft bearing hole through the second shaft connecting rod (11); A first-axis positioning support (28) and a second-axis positioning support (29) are installed on the fixture body (3); the first-axis bearing hole thrust cone shaft (26) is guided in the vertical direction in the center hole (31) of the first-axis positioning support; the upper end surface of the first-axis positioning support (28) is provided with a plurality of first-axis positioning support slider guide grooves (33) evenly distributed along the circumferential direction; a plurality of first-axis sliding positioning blocks (27) are slidably connected in the first-axis positioning support slider guide grooves (33); the upper end conical surface of the first-axis bearing hole thrust cone shaft (26) contacts the inner ends of the plurality of first-axis sliding positioning blocks (27); and a first-axis thrust cone shaft cover plate (23) is fixed on the first-axis positioning support (28); The thrust cone shaft (19) of the second axis bearing hole is guided in the vertical direction in the center hole (30) of the second axis positioning support. The upper end surface of the second axis positioning support (29) is provided with a plurality of second axis positioning support slider guide grooves (32) evenly distributed in the circumferential direction. A plurality of second axis sliding positioning blocks (18) are slidably connected in the second axis positioning support slider guide grooves (32). The upper end conical surface of the thrust cone shaft (19) of the second axis bearing hole contacts the inner ends of the plurality of second axis sliding positioning blocks (18). A second axis thrust cone shaft cover plate (22) is fixed on the second axis positioning support (29). The outer ends of the first axis sliding positioning block (27) and the second axis sliding positioning block (18) are clamping positioning ends.

2. A slider-type linkage automatic centering device according to claim 1, characterized in that: A ball socket is processed at the other end of the transmission rod (7), and a floating connection is achieved by contacting the steel ball (14) in the ball socket with the upper surface of the square hole in the middle of the linkage block (13); a linkage block guide support (10) fixed on the clamp body (3) is provided above the linkage block (13), and the linkage block (13) is located in a guide groove of the linkage block guide support (10).

3. A slider-type linkage automatic centering device according to claim 1 or 2, characterized in that: The first-axis connecting rod screw hole (16) on the linkage block (13) is threadedly connected to the first-axis connecting rod (17), and the T-shaped head of the first-axis connecting rod (17) is inserted into the bottom T-shaped groove of the thrust cone shaft (26) of the first-axis bearing hole to achieve floating connection; the second-axis connecting rod screw hole (12) on the linkage block (13) is threadedly connected to the second-axis connecting rod (11), and the T-shaped head of the second-axis connecting rod (11) is inserted into the bottom T-shaped groove of the thrust cone shaft (19) of the second-axis bearing hole to achieve floating connection.

4. A slider-type linkage automatic centering device according to claim 1 or 2, characterized in that: There are three sliding positioning blocks (27) on one axis, with an angle of 120 。 Evenly distributed, the two-axis sliding positioning blocks (18) have two pieces, with an angle of 180 。 Symmetrical and even distribution.

5. The slider-type linkage automatic centering device according to claim 1, characterized in that: A single-axis tension spring connecting rod (24) is fixed on each single-axis sliding positioning block (27), and a Y-shaped tension spring structure is composed of three single-axis tension springs (25), that is, one end of the three single-axis tension springs (25) is fixedly connected together, and the other end is respectively hung on the three single-axis tension spring connecting rods (24), so as to provide a retraction tension for the single-axis sliding positioning block (27), and a two-axis tension spring connecting rod (21) is fixed on each two-axis sliding positioning block (18), and a two-axis tension spring (20) is respectively hung on the two two-axis tension spring connecting rods (21), so as to provide a retraction tension for the two-axis sliding positioning block (18).

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