Upper clamping fixture mechanism for support parts

Abstract

The utility model discloses an upper clamping fixture mechanism of a support part, which comprises a fixture main body, an opening groove is formed in the center of the fixture main body, a one-way OK clamp is arranged at the lower part in the groove, a height positioning block is arranged in the middle, and the support part is arranged at the upper part; the two cylindrical positioning and clamping pins are connected with the clamp body through pin holes in the left side and the right side of the upper end of the clamp body and used for vertically positioning and clamping the support part; the height positioning block is fixedly connected with the one-way OK clamp and matched with the two cylindrical positioning and clamping pins to complete height positioning and clamping of the support part, the threaded end of the compression screw sequentially penetrates through one side wall of the clamp body and the one-way OK clamp and then is in threaded connection with the other side wall of the clamp body, and the compression screw is rotated to drive the one-way OK clamp to move upwards. And then the height positioning block is driven to move upwards. According to the utility model, the positioning and upper clamping of parts are realized, and the positioning error is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of machine tool fixture accessories and relates to an upper clamping fixture mechanism for bracket-type parts. Background Art

[0002] As we all know, the general positioning and clamping methods of general and special fixtures all adopt lower positioning horizontal clamping or downward pressing. This positioning and clamping method is applicable to the vast majority of parts, but it is not universal for some parts (such as those whose design and positioning reference is upper positioning). Therefore, the design of the positioning and clamping mechanism of the fixture for such parts becomes the key to the problem. Utility Model Content

[0003] (1) Purpose of the utility model

[0004] The purpose of this utility model is to provide an upper clamping fixture mechanism for bracket-type parts, which is used to solve the problem that some parts cannot be processed by methods such as lower positioning horizontal clamping or downward pressing, as well as the positioning error caused by the positioning and clamping methods not coinciding with the design reference.

[0005] (2) Technical solution

[0006] In order to solve the above technical problems, the utility model provides an upper clamping fixture mechanism for bracket-type parts, which includes: a fixture body 1, a one-way OK clamp 2, a cylindrical positioning clamping pin 3, a height positioning block 4, and a tightening screw 5; an open slot is provided in the center of the fixture body 1, in which the one-way OK clamp 2 is arranged at the lower part, the height positioning block 4 is arranged in the middle part, and the bracket-type parts 6 are arranged at the upper part; the upper part of the open slot completes the shape positioning of the bracket-type parts 6, and the two cylindrical positioning clamping pins 3 are connected to the fixture body 1 through the pin holes on the left and right sides of the upper end of the fixture body 1, which is used for bracket-type parts. The upper and lower positioning and clamping of the part 6; the height positioning block 4 is connected and fixed with the one-way OK clamp 2, and cooperates with the two cylindrical positioning clamping pins 3 to complete the height positioning and clamping of the bracket-type parts 6. The threaded end of the clamping screw 5 passes through one side wall of the fixture body 1 and the one-way OK clamp 2 in turn and is threadedly connected with the other side wall of the fixture body 1. By rotating the clamping screw 5, the one-way OK clamp 2 is driven to move upward, and then the height positioning block 4 is driven to move upward. The upward movement of the height positioning block 4 is coordinated with the two cylindrical positioning clamping pins 3 to complete the clamping of the bracket-type parts 6, and the opposite is true when it is loosened.

[0007] Among them, the clamp body 1 is cylindrical, and a base is provided at the lower end, and the base is symmetrically distributed on the left and right, and a U-shaped groove is provided at each end of the left and right ends for fixing the clamp body 1 to the machine tool workbench; an upper step is provided on the upper part of the inner wall of the open groove of the clamp body 1, and the bracket-like parts 6 are arranged in the groove corresponding to the upper step for its shape positioning; a group of left and right symmetrical planes are provided on the outer peripheral surface of the bracket-like parts 6, and positioning pin holes are provided at the centers of the left and right symmetrical planes for connecting the cylindrical positioning clamping pin 3.

[0008] Among them, a through hole is provided on one side of the middle portion of the side wall of the opening groove of the clamp body 1 , and a threaded hole is provided on the other side for the compression screw 5 to pass through and be connected.

[0009] Among them, the one-way OK clamp 2 is in the shape of a rectangular parallelepiped, and the one-way OK clamp 2 includes three parts: upper, middle and lower; the upper part is trapezoidal and is provided with a group of threaded holes and dovetail guide grooves, which are fixed to the height positioning block 4 through the threaded holes, and sliding is achieved by cooperating with the middle part through the dovetail guide grooves; the middle part is an inclined wedge block, wherein the upper and lower ends have dovetail guide rails, and the center contains a stepped through-hole, and the upper and lower ends have dovetail guide rails for cooperating with the upper part and the lower part respectively, and the stepped through-hole is for the tightening screw 5 to pass through; the lower part is a rectangular V-shaped block, containing a dovetail guide groove, which cooperates with the dovetail guide rail at the lower end of the middle part.

[0010] The cylindrical positioning clamping pins 3 are stepped cylinders, and the two cylindrical positioning clamping pins 3 are connected to the positioning pin holes of the clamp body 1 through the pin holes on the left and right sides of the upper end of the clamp body 1 respectively.

[0011] Among them, the height positioning block 4 is a rectangular parallelepiped, and the left and right ends of the height positioning block 4 contain symmetrical square bosses, which are used for height positioning and clamping of the bracket-type parts 6. The upper plane of the height positioning block 4 contains a group of stepped through holes, which are used to align with the threaded holes on the one-way OK clamp 2 and are connected and fixed by screws.

[0012] The clamping screw 5 is a stepped cylinder with a hexagonal head. The one-way OK clamp 2 is driven to move upward by rotating the clamping screw 5 .

[0013] Among them, the material of the clamp body 1 is 40Cr alloy steel, the material of the one-way OK clamp 2 is 40Cr alloy steel, the material of the cylindrical positioning clamping pin 3 is 40Cr alloy steel, the material of the height positioning block 4 is 40Cr alloy steel, and the material of the clamping screw 5 is 45# medium carbon steel.

[0014] The flatness of each surface of the fixture body 1, the one-way OK clamp 2, and the height positioning block 4 is less than 0.01mm, the parallelism is less than 0.02mm, and the perpendicularity is less than 0.02mm. The cylindricity of the cylindrical positioning clamping pin 3 is less than 0.01mm.

[0015] The hardness of the clamp body 1, the one-way OK clamp 2, the cylindrical positioning clamping pin 3, the height positioning block 4, and the clamping screw 5 is 38HRC to 42HRC.

[0016] (3) Beneficial effects

[0017] The upper clamping fixture mechanism of the bracket parts provided by the above technical solution has the following features:

[0018] Beneficial effects:

[0019] (1) Both positioning and clamping adopt the upper clamping method, which can effectively solve the problem that some parts cannot be processed by lower positioning horizontal clamping or downward pressing.

[0020] (2) It can effectively solve the positioning error of some parts caused by the misalignment between the positioning and clamping methods and the design datum.

[0021] (3) The biggest technical advantage is the use of one-way OK clamps, which makes clamping parts convenient and quick, and also lays the foundation for the design concept of subsequent special fixtures. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural principle diagram of the upper clamping fixture mechanism of the bracket-type parts in an embodiment of the utility model.

[0023] Figure 2 This is a three-dimensional schematic diagram of the upper clamping fixture mechanism of the bracket-type parts according to an embodiment of the present utility model.

[0024] In the figure, 1- fixture body, 2- one-way OK clamp, 3- cylindrical positioning clamping pin, 4- height positioning block, 5- clamping screw, 6- bracket parts. DETAILED DESCRIPTION

[0025] In order to make the purpose, content and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below with reference to the accompanying drawings and embodiments.

[0026] Reference Figure 1 and Figure 2As shown, the upper clamping fixture mechanism of the bracket-like parts in this embodiment includes: a fixture body 1, a one-way OK clamp 2, a cylindrical positioning clamping pin 3, a height positioning block 4, and a tightening screw 5; an open slot is provided in the center of the fixture body 1, in which the one-way OK clamp 2 is arranged at the lower part, the height positioning block 4 is arranged in the middle part, and the bracket-like parts 6 are arranged at the upper part; the upper part of the open slot completes the shape positioning of the bracket-like parts 6, and the two cylindrical positioning clamping pins 3 are connected to the fixture body 1 through the pin holes on the left and right sides of the upper end of the fixture body 1, and are used for the upper and lower positioning of the bracket-like parts 6 and clamping; the height positioning block 4 is connected and fixed with the one-way OK clamp 2, and cooperates with the two cylindrical positioning clamping pins 3 to complete the height positioning and clamping of the bracket-like parts 6. The threaded end of the clamping screw 5 passes through one side wall of the fixture body 1 and the one-way OK clamp 2 in turn and is threadedly connected with the other side wall of the fixture body 1. By rotating the clamping screw 5, the one-way OK clamp 2 is driven to move upward, and then the height positioning block 4 is driven to move upward. The upward movement of the height positioning block 4 is coordinated with the two cylindrical positioning clamping pins 3 to complete the clamping of the bracket-like parts 6, and vice versa.

[0027] Specifically, the fixture body 1 is cylindrical, with a base at its lower end. The bases are symmetrically arranged on both sides, with U-shaped grooves on each end for securing the fixture body 1 to the machine tool worktable. An upper step is provided on the inner wall of the opening of the fixture body 1, and a bracket component 6 is arranged in the corresponding groove of the upper step to provide external positioning. The outer surface of the bracket component 6 has a pair of left and right symmetrical planes, with locating pin holes at the center of each plane for connecting to the cylindrical locating clamping pin 3. A through hole is provided on one side of the central side wall of the opening of the fixture body 1, and a threaded hole is provided on the other side for the insertion and connection of the clamping screw 5.

[0028] The one-way OK clamp 2 is in the shape of a rectangular parallelepiped and includes three parts: upper, middle and lower parts; the upper part is trapezoidal and is provided with a group of threaded holes and dovetail guide grooves, which are fixed to the height positioning block 4 through the threaded holes and slide in cooperation with the middle part through the dovetail guide grooves; the middle part is an oblique wedge block, wherein the upper and lower ends have dovetail guide rails, and the center contains a stepped through-hole, and the upper and lower ends have dovetail guide rails for cooperating with the upper part and the lower part respectively, and the stepped through-hole is for the tightening screw 5 to pass through; the lower part is a rectangular V-shaped block with a dovetail guide groove, which cooperates with the dovetail guide rail at the lower end of the middle part.

[0029] The cylindrical positioning clamping pins 3 are stepped cylinders, and the two cylindrical positioning clamping pins 3 are connected to the positioning pin holes of the clamp body 1 through the pin holes on the left and right sides of the upper end of the clamp body 1 respectively.

[0030] The height positioning block 4 is in the shape of a rectangular parallelepiped, and contains symmetrical square bosses at both ends of the height positioning block 4, which is used for height positioning and clamping of the bracket-type parts 6. The upper plane of the height positioning block 4 contains a group of stepped through holes, which are used to align with the threaded holes on the one-way OK clamp 2 and are connected and fixed by screws.

[0031] The clamping screw 5 is a stepped cylinder with an inner hexagonal head. By rotating the clamping screw 5, the one-way OK clamp 2 can be driven to move upward, thereby driving the height positioning block 4 to move upward. The upward movement of the height positioning block 4 cooperates with the two cylindrical positioning clamping pins 3 to complete the clamping of the bracket-like parts 6, and the opposite is true when loosening.

[0032] The material of the clamp body 1 is 40Cr alloy steel, the material of the one-way OK clamp 2 is 40Cr alloy steel, the material of the cylindrical positioning clamping pin 3 is 40Cr alloy steel, the material of the height positioning block 4 is 40Cr alloy steel, and the material of the clamping screw 5 is 45# medium carbon steel.

[0033] The flatness of each surface of the clamp body 1, the one-way OK clamp 2, and the height positioning block 4 is less than 0.01mm, the parallelism is less than 0.02mm, and the perpendicularity is less than 0.02mm. The cylindricity of the cylindrical positioning clamping pin 3 is less than 0.01mm.

[0034] The hardness of the clamp body 1, the one-way OK clamp 2, the cylindrical positioning clamping pin 3, the height positioning block 4, and the pressing screw 5 is 38HRC to 42HRC.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An upper clamping fixture mechanism for bracket parts, characterized in that: include: The fixture body (1), the one-way OK clamp (2), the cylindrical positioning clamping pin (3), the height positioning block (4), and the pressing screw (5); an open slot is provided in the center of the fixture body (1), the one-way OK clamp (2) is arranged at the lower part of the open slot, the height positioning block (4) is arranged in the middle part, and the bracket part (6) is arranged at the upper part; the upper part of the open slot completes the shape positioning of the bracket part (6), and the two cylindrical positioning clamping pins (3) are connected to the fixture body (1) through the pin holes on the left and right sides of the upper end of the fixture body (1) and are used for the upper and lower positioning and clamping of the bracket part (6); the height positioning block (4 ) is connected and fixed with the one-way OK clamp (2), and cooperates with two cylindrical positioning clamping pins (3) to complete the height positioning and clamping of the bracket-like parts (6). The threaded end of the clamping screw (5) passes through one side wall of the clamp body (1), the one-way OK clamp (2) and the other side wall of the clamp body (1) in sequence. By rotating the clamping screw (5), the one-way OK clamp (2) is driven to move upward, and then the height positioning block (4) is driven to move upward. By moving the height positioning block (4) upward and cooperating with the two cylindrical positioning clamping pins (3), the bracket-like parts (6) are clamped, and the opposite is true when the height positioning block (4) is moved upward.

2. The upper clamping fixture mechanism for bracket parts according to claim 1, characterized in that: The clamp body (1) is cylindrical, with a base provided at the lower end, and the base is symmetrically distributed on the left and right sides, wherein U-shaped grooves are provided at the left and right ends of the base for fixing the clamp body (1) to the machine tool workbench; an upper step is provided on the upper part of the inner wall of the opening groove of the clamp body (1), and the bracket-like part (6) is arranged in the groove corresponding to the upper step for positioning its outer shape; a group of left and right symmetrical planes are provided on the outer peripheral surface of the bracket-like part (6), and positioning pin holes are provided at the centers of the left and right symmetrical planes for connecting the cylindrical positioning clamping pin (3).

3. The upper clamping fixture mechanism for bracket parts according to claim 2, characterized in that: A through hole is provided on one side of the middle portion of the side wall of the opening groove of the clamp body (1), and a threaded hole is provided on the other side for allowing the clamping screw (5) to pass through and connect the clamping screw (5).

4. The upper clamping fixture mechanism for bracket parts according to claim 3, characterized in that: The one-way OK clamp (2) is in the shape of a rectangular parallelepiped and comprises three parts: an upper part, a middle part and a lower part; the upper part is in the shape of a trapezoid and is provided with a group of threaded holes and dovetail guide grooves, fixed to the height positioning block (4) through the threaded holes, and sliding is achieved by cooperating with the middle part through the dovetail guide grooves; the middle part is an inclined wedge block, wherein the upper and lower ends are provided with dovetail guide rails, the center contains a stepped through hole, the upper and lower ends are provided with dovetail guide rails for cooperating with the upper part and the lower part respectively, and the stepped through hole is for a tightening screw (5) to pass through; the lower part is a rectangular V-shaped block, containing a dovetail guide groove, and cooperating with the dovetail guide rail at the lower end of the middle part.

5. The upper clamping fixture mechanism for bracket parts according to claim 4, characterized in that: The cylindrical positioning clamping pins (3) are stepped cylindrical bodies, and the two cylindrical positioning clamping pins (3) are connected to the positioning pin holes of the clamp body (1) through the pin holes on the left and right sides of the upper end of the clamp body (1).

6. The upper clamping fixture mechanism for bracket parts according to claim 5, characterized in that: The height positioning block (4) is in the shape of a rectangular parallelepiped. The left and right ends of the height positioning block (4) contain symmetrical square bosses for height positioning and clamping of the bracket-type parts (6). The upper plane of the height positioning block (4) contains a group of stepped through holes for aligning with the threaded holes on the upper part of the one-way OK clamp (2) and achieving connection and fixation via screws.

7. The upper clamping fixture mechanism for bracket parts according to claim 6, characterized in that: The clamping screw (5) is a stepped cylinder with an inner hexagonal shape on its head. The one-way OK clamp (2) is driven to move upward by rotating the clamping screw (5).

8. The upper clamping fixture mechanism for bracket parts according to claim 7, characterized in that: The material of the clamp body (1) is 40Cr alloy steel, the material of the one-way OK clamp (2) is 40Cr alloy steel, the material of the cylindrical positioning clamping pin (3) is 40Cr alloy steel, the material of the height positioning block (4) is 40Cr alloy steel, and the material of the clamping screw (5) is 45# medium carbon steel.

9. The upper clamping fixture mechanism for bracket parts according to claim 8, characterized in that: The flatness of each surface of the clamp body (1), the one-way OK clamp (2), and the height positioning block (4) is less than 0.01 mm, the parallelism is less than 0.02 mm, and the verticality is less than 0.02 mm; the cylindricity of the cylindrical positioning clamping pin (3) is less than 0.01 mm.

10. The upper clamping fixture mechanism for bracket parts according to claim 9, characterized in that: The hardness of the clamp body (1), the one-way OK clamp (2), the cylindrical positioning clamping pin (3), the height positioning block (4), and the pressing screw (5) is 38HRC to 42HRC.

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