Inner support clamp

Abstract

The utility model discloses an internal support clamp which comprises an installation base, a clamp body and a pull-down block, the clamp body and the pull-down block are arranged on the installation base, an internal support screw is arranged in the clamp body in an up-down sliding mode, the internal support screw slides downwards to drive the clamp body to be opened towards the circumferential side, and the internal support screw is in threaded connection with the pull-down block. And a driving assembly for driving the pull-down block to move downwards is arranged on the mounting base. The clamping device has the advantages of being high in clamping reliability, small in occupied space, uniform in product stress and not prone to deviation.

Description

Technical Field

[0001] The utility model relates to the technical field of jigs, in particular to an internal support jig. Background Art

[0002] When machining a workpiece on a machine tool, in order to make the surface of the workpiece meet the technical requirements such as the fixed dimensions, geometric shapes and the mutual position accuracy of other surfaces on the drawing, the workpiece must be installed and positioned correctly before machining. In the process of mechanical manufacturing, a jig is used to fix the machining object so that it occupies the correct position to receive machining or inspection, thereby ensuring the machining requirements. The structure of the jig directly affects the machining result of the workpiece.

[0003] For the existing blind hole internal support jigs, there are pneumatic tensioning methods and side screw jacking methods. The pneumatic tensioning method is restricted by the cylinder structure, the jig body occupies a large space and is too high, resulting in poor machining stability; in the side jacking method, it is easy to have uneven force on the jig and cause deviation, and when the jig body is too high, vibration is easily generated during machining, affecting the machining quality.

[0004] In view of this, the purpose of the utility model is to provide a new technical solution to solve the existing technical problems. Content of the Utility Model

[0005] In order to overcome the deficiencies of the prior art, the utility model provides an internal support jig, which solves the problems of large space occupation and poor clamping effect.

[0006] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0007] An internal support jig includes an installation base, a jig body and a lower pull block arranged on the installation base. An internal support screw is slidably arranged up and down in the jig body. The internal support screw slides downward to drive the jig body to expand laterally. The internal support screw is threadedly connected to the lower pull block, and a driving component for driving the lower pull block to move downward is arranged on the installation base.

[0008] In the above structure, the internal support screw is a taper screw, a tapered internal support hole is formed in the middle of the jig body, and the internal support screw is slidably arranged in the internal support hole.

[0009] In the above structure, multiple groups of the jig bodies are arranged on the installation base. Each group of the jig bodies has two jig bodies. The internal support screws and the jig bodies are arranged in one-to-one correspondence. Each group of the jig bodies corresponds to one lower pull block, and the two internal support screws of each group are respectively threadedly connected to both sides of the lower pull block.

[0010] In the above structure, the driving assembly includes a fixed card block, a wedge block and a pressure block, the fixed card block is fixedly connected to the side of the mounting base facing away from the clamp body, the wedge block is slidably connected to the fixed card block, the pressure block is arranged between the fixed card block and the pull-down block, and the pressure block is provided with a sliding inclined surface for the wedge block to slide, the fixed card block is fixedly connected to a fixed stop block, and the pressure block slides up and down on the fixed stop block.

[0011] In the above structure, a mounting recess is provided in the middle of the pull-down block, and a limiting slot is provided on one side of the pressing block facing the pull-down block, and the pressing block is clamped in the mounting recess through the limiting slot.

[0012] In the above structure, a pull-in bolt is rotatably connected to the wedge block, and the pull-in bolt is threadedly connected to the fixed stop block.

[0013] In the above structure, a sliding slot is provided on the fixed block, and a sliding block which is slidably connected to the sliding slot is fixedly connected to the wedge block.

[0014] In the above structure, return springs are arranged on opposite sides of the pull-down block, and the two return springs are arranged corresponding to the inner supporting screws. One end of the return spring is connected to the side of the pull-down block facing away from the inner supporting screw, and the other end is connected to the bottom of the mounting base.

[0015] In the above structure, the mounting base includes a base top plate, a base side plate and a base bottom plate, the base top plate and the base bottom plate are connected via the base side plate, and the base top plate is located above the base bottom plate, the clamp body is arranged on the base top plate, the pull-down block and the drive assembly are arranged between the base top plate and the base bottom plate, and a clearance hole for the internal support screw to pass through is opened on the base top plate.

[0016] In the above structure, the base top plate is detachably fixed with a clamp pressure plate on two opposite sides, the clamp pressure plate is fixedly connected with a pressure strip, and the clamp body is provided with a limiting groove on the periphery, and the pressure strips on both sides are clamped in the limiting groove.

[0017] The beneficial effects of the utility model are as follows: by arranging a pull-down block to cooperate with the inner supporting screw, the driving component drives the pull-down block to move, which can drive the inner supporting screw to slide downward on the clamp body, so that the clamp body expands the product, the clamping reliability is high, and the product is evenly stressed on the clamp body, the product is not easy to be offset during clamping, and the utility model has a simple structure and occupies little space. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 is a schematic diagram of the partial structure disassembly of the present utility model;

[0021] Figure 3 is a schematic cross-sectional view of the present utility model;

[0022] Figure 4 is a schematic diagram of the connection structure of the driving component of the present utility model;

[0023] Figure 5 is a schematic cross-sectional view of the other side of the present utility model.

[0024] Reference numerals:

[0025] 1. Mounting base; 11. Base top plate; 111. Clamp pressing plate; 112. Pressure strip; 12. Base side plate; 13. Base bottom plate;

[0026] 2. Clamp body; 21. Inner support hole; 22. Inner support screw; 23. Limit groove;

[0027] 3. Pull-down block; 31. Mounting recess; 32. Return spring;

[0028] 4. Driving component; 41. Fixed clamping block; 411. Sliding clamping groove; 42. Wedge block; 421. Sliding clamping block; 43. Pressing block; 431. Inclined surface; 432. Limit clamping groove; 44. Fixed stop block; 45. Pull-in bolt; 451. Limit retaining ring;

[0029] 5. Product. Detailed implementation manners

[0030] The following further describes the present utility model in conjunction with the appended Figures 1-5 drawings.

[0031] The following will clearly and completely describe the concept, specific structure and technical effects generated by the present utility model in conjunction with the embodiments and drawings, so as to fully understand the purpose, features and effects of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of protection of the present utility model. In addition, all the connection / connection relationships involved in the patent do not simply refer to the direct connection of components, but refer to the more optimal connection structure that can be formed by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the present utility model can be combined with each other without conflicting with each other.

[0032] Refer to Figures 1 to 5, the present utility model provides an internal support fixture, which includes an installation base 1, a fixture body 2 and a pull-down block 3. Among them, the installation base 1 is the base of the entire fixture and is used to be installed on the carrier for each component; the fixture body 2 is arranged on the installation base 1, and the fixture body 2 is used to expand and fix the product 5. An internal support screw 22 is slidably arranged up and down inside the fixture body 2. When the internal support screw 22 slides downward, it can drive the fixture body 2 to expand around. At this time, the product 5 placed on the fixture body 2 will be expanded and tightened as the fixture body 2 expands, so as to fix the product 5; the pull-down block 3 is connected to the internal support screw 22 to drive the internal support screw 22 to slide in the fixture body 2. When the pull-down block 3 moves downward, it can pull the internal support screw 22 to slide downward in the fixture body 2; a driving component 4 is arranged on the installation base 1, and the driving component 4 is used to drive the pull-down block 3 to move downward.

[0033] Referring to Figure 2 , further, the internal support screw 22 is a taper screw, and a tapered internal support hole 21 is opened in the middle of the fixture body 2. The internal support screw 22 slides in the internal support hole 21, and the hole wall of the internal support hole 21 cooperates with the tapered part of the internal support screw 22. By adopting the cooperation of the internal support screw 22 and the tapered internal support hole 21 opened in the middle of the fixture body 2, the fixture body 2 can be uniformly stressed in all directions during the downward sliding of the internal support screw 22, that is, the expanding forces of all directions of the fixture body 2 are the same. Then, the product 5 arranged on the fixture body 2 can also receive the same expanding force in all directions, with uniform stress, effectively reducing the possibility of the product 5 being deformed due to different expanding forces around the fixture body 2.

[0034] Referring to Figure 1 and Figure 2 , in this embodiment, multiple groups of fixture bodies 2 are arranged on the installation base 1. Two fixture bodies 2 are arranged on each group of fixture bodies 2. One internal support screw 22 is correspondingly arranged on each fixture body 2. One pull-down block 3 is correspondingly arranged for each group of fixture bodies 2. That is, the two internal support screws 22 on one group of fixture bodies 2 are connected to the same pull-down block 3, and the two internal support screws 22 are respectively threadedly connected to both sides of the pull-down block 3. One pull-down block 3 corresponds to the two internal support screws 22 in one group. When the pull-down block 3 moves downward, it can simultaneously drive the two fixture bodies 2 to expand and tighten the product 5, effectively improving the clamping efficiency.

[0035] Referring to Figures 3 to 5, the driving component 4 is used to drive the downward movement of the pull-down block 3. The driving components 4 are arranged in one-to-one correspondence with the pull-down blocks 3. Specifically, the driving component 4 includes a fixed clamping block 41, a wedge block 42 and a pressing block 43. Among them, the fixed clamping block 41 is fixedly connected to the side of the mounting base 1 facing away from the fixture body 2, and the fixed clamping block 41 is located above the pull-down block 3. The wedge block 42 is slidably connected to the fixed clamping block 41. The pressing block 43 is arranged between the fixed clamping block 41 and the pull-down block 3, and an inclined surface 431 for the wedge block 42 to slide is provided on the pressing block 43. The inclined surface 431 cooperates with the wedge block 42. A fixed stop block 44 is fixedly connected to the fixed clamping block 41. The pressing block 43 can slide up and down on the fixed stop block 44. Push the wedge block 42 in the direction close to the fixed stop block 44. At this time, the wedge block 42 slides on the inclined surface 431 of the pressing block 43, driving the pressing block 43 to slide downward on the fixed stop block 44, pushing the pull-down block 3 to move downward, and then driving the inner support screw 22 to slide downward in the inner support hole 21.

[0036] The wedge block 42 is slidably connected to the fixed clamping block 41. Specifically, a sliding groove 411 is provided on the fixed clamping block 41. A sliding block 421 is fixedly connected to the wedge block 42. The sliding block 421 is slidably connected to the sliding groove 411, driving the wedge block 42 to slide on the fixed clamping block 41. The sliding block 421 and the sliding groove 411 cooperate to guide and limit the sliding of the wedge block 42.

[0037] Furthermore, an installation recess 31 is provided in the middle of the pull-down block 3. The installation recess 31 is located between the two inner support screws 22 on the pull-down block 3. A limit groove 432 is provided on the side of the pressing block 43 facing the pull-down block 3. The limit groove 432 is clamped in the installation recess 31 to realize the connection and fixation between the pressing block 43 and the pull-down block 3.

[0038] Furthermore, a pulling bolt 45 is rotatably connected to the wedge block 42. Specifically, an installation hole is provided on the wedge block 42. The pulling bolt 45 passes through the installation hole, and the end of the pulling bolt 45 abuts against the wedge block 42. A limit retaining ring 451 is provided in the installation hole. The limit retaining ring 451 is clamped to the pulling bolt 45 and abuts against the hole wall of the installation hole to realize the limit fixation of the pulling bolt 45. The end of the pulling bolt 45 away from the wedge block 42 is threadedly connected to the fixed stop block 44. By rotating the pulling bolt 45, the wedge block 42 can be driven to slide on the pressing block 43, so that the pressing block 43 moves downward, driving the pull-down block 3 to pull the inner support screw 22.

[0039] Further, a return spring 32 is connected to the side of the pull-down block 3 facing away from the inner support screw 22. The return springs 32 are arranged in one-to-one correspondence with the inner support screws 22. One end of the return spring 32 is fixedly connected to the side of the pull-down block 3 facing away from the inner support screw 22, and the other end is fixedly connected to the bottom of the mounting base 1. When the pull-down block 3 moves downward, the return spring 32 is elastically compressed. When the pulling bolt 45 is rotated to move the wedge block 42 away from the fixed stop 44, the return spring 32 is gradually elastically released, pushing the pull-down block 3 to reset upward, thereby driving the inner support screw 22 to slide upward in the inner support hole 21. When the inner support screw 22 is reset, the force for the fixture body 2 to expand around disappears, and at this time, the product 5 can be removed from the fixture body 2.

[0040] Referring to Figure 1 , in this embodiment, the mounting base 1 includes a base top plate 11, base side plates 12, and a base bottom plate 13. The two base side plates 12 are erected opposite to each other. The base top plate 11 is fixedly connected to one side of the base side plates 12, and the base bottom plate 13 is fixedly connected to the side of the base side plates 12 away from the base top plate 11. The base top plate 11 is located above the base bottom plate 13, and an installation space is formed between the base top plate 11 and the base bottom plate 13. The fixture body 2 is arranged on the base top plate 11, the pull-down block 3 and the driving assembly 4 are arranged in the installation space, and a relief hole for the modified inner support screw 22 to pass through is formed on the base top plate 11. The relief holes are arranged in one-to-one correspondence with the inner support screws 22, and the inner support screws 22 can slide up and down in the relief holes. The driving assembly 4 is arranged in the installation space so that the operating direction of the pulling bolt 45 is relatively far away from the product 5 to achieve better clamping convenience.

[0041] Further, the fixture body 2 is fixedly connected to the base top plate 11. Specifically, fixture pressing plates 111 are detachably and fixedly connected to opposite sides of the base top plate 11. The fixture pressing plates 111 extend along the length direction of the base top plate 11. Pressure strips 112 are fixedly arranged on the fixture pressing plates 111. A limiting groove 23 is formed on the periphery of the fixture body 2. When the fixture body 2 is installed on the base top plate 11, the pressure strips 112 are snapped into the limiting groove 23 to realize the limiting and fixing of the fixture. The fixture pressing plates 111 can be locked and fixed by conventional fasteners such as bolts and fixing screws.

[0042] The above is a specific description of the preferred embodiment of the present invention, but the present invention is not limited to the described embodiments. Those skilled in the art can make various equivalent deformations or substitutions without departing from the spirit of the present invention, and these equivalent deformations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. An internal support fixture, characterized in that: It includes a mounting base, a clamp body and a pull-down block arranged on the mounting base. An internal support screw is arranged in the clamp body for sliding up and down. The internal support screw slides downward to drive the clamp body to be opened toward the circumference. The internal support screw is threadedly connected to the pull-down block. A driving component for driving the pull-down block to move downward is arranged on the mounting base.

2. The internal support fixture according to claim 1, wherein: The inner support screw is a tapered screw, a tapered inner support hole is opened in the middle of the clamp body, and the inner support screw is slidably arranged in the inner support hole.

3. The internal support fixture according to claim 1, characterized in that: A plurality of groups of the clamp bodies are arranged on the mounting base, each group of the clamp bodies is provided with two clamp bodies, the inner support screws and the clamp bodies are arranged in one-to-one correspondence, each group of the clamp bodies is correspondingly provided with a pull-down block, and the two inner support screws of each group are respectively threadedly connected to the two sides of the pull-down block.

4. The internal support fixture according to claim 3, characterized in that: The driving assembly includes a fixed card block, a wedge block and a pressure block, the fixed card block is fixedly connected to the side of the mounting base facing away from the clamp body, the wedge block is slidably connected to the fixed card block, the pressure block is arranged between the fixed card block and the pull-down block, and the pressure block is provided with a sliding inclined surface for the wedge block to slide, the fixed card block is fixedly connected to a fixed stopper, and the pressure block slides up and down on the fixed stopper.

5. The internal support fixture according to claim 4, characterized in that: The middle part of the pull-down block is provided with a mounting recess, and the pressing block is provided with a limiting slot on one side facing the pull-down block, and the pressing block is clamped in the mounting recess through the limiting slot.

6. The internal support fixture according to claim 4, wherein: A pull-in bolt is rotatably connected to the wedge block, and the pull-in bolt is threadedly connected to the fixed stop block.

7. The internal support fixture according to claim 4, characterized in that: The fixed card block is provided with a sliding card slot, and the wedge block is fixedly connected with a sliding card block which is slidably connected to the sliding card slot.

8. The internal support fixture according to claim 4, characterized in that: Reset springs are arranged on opposite sides of the pull-down block, and the two reset springs are arranged corresponding to the inner support screws. One end of the reset spring is connected to the side of the pull-down block facing away from the inner support screw, and the other end is connected to the bottom of the mounting base.

9. The internal support fixture according to claim 1, characterized in that: The mounting base includes a base top plate, a base side plate and a base bottom plate, the base top plate and the base bottom plate are connected via the base side plates, and the base top plate is located above the base bottom plate, the clamp body is arranged on the base top plate, the pull-down block and the drive assembly are arranged between the base top plate and the base bottom plate, and a clearance hole is opened on the base top plate for the inner support screw to pass through.

10. The internal support fixture according to claim 9, characterized in that: The base top plate is detachably fixed with clamp pressing plates on two opposite sides, the clamp pressing plates are fixedly connected with pressure strips, and the clamp body is provided with limiting grooves on the periphery, and the pressure strips on both sides are clamped in the limiting grooves.

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