Floating reference expansion core clamp

Abstract

The utility model relates to the technical field of machining, in particular to a floating reference expansion core clamp. After the toothed part is roughly positioned through the positioning tooth die, the driving component drives the tensioning component to perform tensioning positioning on the inner side wall of the toothed part, meanwhile, the floating component drives the toothed part on the positioning tooth die to perform pose adjustment so as to perform floating compensation, and the tensioning component is adopted to center the toothed part, so that the positioning precision of the toothed part is improved. The floating benchmark of the floating part is used for positioning the toothed part on the positioning tooth die, the distance from the pitch circle of the toothed part to the mounting end face is well guaranteed, the tooth profile error of the toothed part can be compensated through the floating design, and the problem of abnormal sound after final assembly of a product is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of machining, and relates to a floating reference core expansion clamp. Background Art

[0002] Existing metal cutting processing methods, especially turning, generally use three-jaw chucks as clamping parts. The processing of toothed parts is carried out step by step, and they need to be disassembled many times to complete the processing of all surfaces. It requires additional transfer time and loading and unloading time. Not only is the processing accuracy low and the clamping is inconvenient, but also because the bevel gear is precision forged when it is a blank, there is a certain error in the tooth shape, and there will be posture offset during positioning, which makes it impossible to ensure the installation distance from the pitch circle of the bevel gear to the end face after cutting, which can easily lead to problems such as abnormal noise after the final assembly of the bevel gear. It has certain limitations for parts with high processing accuracy. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a floating reference core expansion clamp which uses a tensioning component to center the toothed part, and a floating reference of a floating component to position the toothed part on a positioning tooth mold, thereby well ensuring the distance from the pitch circle of the toothed part to the installation end face.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model to solve its technical problems is:

[0005] A floating reference core expansion fixture, comprising:

[0006] A body, wherein the body is arranged on a flange base;

[0007] A floating assembly is arranged on the main body, the floating assembly comprises a floating seat, and a floating component is arranged on the floating seat;

[0008] An inner clamping assembly is arranged on the body, the inner clamping assembly comprises a tensioning component and a driving component, the driving component is connected to the tensioning component, a limiting hole is arranged on the floating seat, the tensioning component is passed through the limiting hole, and the driving component is used to drive the tensioning component to tighten and position the inner side wall of the toothed part;

[0009] The positioning tooth die is connected to the floating component, and the positioning tooth die is concentrically arranged with the tensioning component. The positioning tooth die is used to position the toothed part, and the floating component drives the toothed part on the positioning tooth die to adjust its posture for floating compensation.

[0010] In one embodiment of the utility model, the tensioning component includes a tapered body and an expansion sleeve, the tapered body is arranged on the main body, the expansion sleeve is arranged on the tapered body, a first inclined surface is arranged on the outer wall of the tapered body, a plurality of support plates are evenly arranged on the expansion sleeve, and an expansion gap is provided between adjacent support plates, a second inclined surface matching the first inclined surface is arranged on the inner side of the support plate, a clamping surface is arranged on the outer side of the support plate, and the expansion sleeve is connected to the driving component.

[0011] In one embodiment of the utility model, an air flow channel is arranged in the conical body, an air inlet hole is arranged on the main body, the air flow channel is communicated with the air inlet hole, and a plurality of air outlet holes are evenly arranged on the free end of the conical body.

[0012] In one embodiment of the utility model, the driving component includes a pulling sleeve, a pulling hole is provided on the body, the pulling sleeve is slidably arranged on the pulling hole, a plurality of pulling rods are provided on the pulling sleeve, and the free ends of the pulling rods are connected to the expansion sleeve.

[0013] In one embodiment of the utility model, a movable groove is provided on the floating seat, a movement gap is formed between the movable groove and the main body, a pull ring is slidably provided on the movable groove, a clamping groove is provided on the pulling rod, the clamping groove is clamped on the pull ring, the expansion sleeve is connected to the pull ring, and the pulling rod drives the pull ring to reciprocate in the movement gap.

[0014] In one embodiment of the utility model, the positioning tooth mold includes a positioning seat, and a plurality of positioning blocks are evenly arranged on the positioning seat. The plurality of positioning blocks are arranged on the same circumference, and positioning grooves matching the toothed parts are formed between adjacent positioning blocks.

[0015] In one embodiment of the utility model, positioning inclined surfaces are arranged on both sides of the positioning block, a supporting surface matching the toothed part is arranged between the two positioning inclined surfaces, and the supporting surface and the two positioning inclined surfaces form a trapezoidal structure.

[0016] In one embodiment of the utility model, the floating component includes a floating ring and a floating base, the positioning tooth mold is arranged on the floating base, the floating seat is provided with a floating cavity, the floating ring is arranged in the floating cavity, the floating ring is provided with an arc surface, the floating base is provided with an arc guide surface matching the arc surface, and a first floating bearing is provided between the arc guide surface and the arc surface.

[0017] In one embodiment of the present invention, the floating component further comprises a second floating bearing and a third floating bearing, the second floating bearing is arranged between the floating ring and the end cover of the floating seat, and the third floating bearing is arranged between the floating ring and the floating seat.

[0018] In one embodiment of the utility model, the first floating bearing, the second floating bearing and the third floating bearing have the same structure, the first floating bearing comprises a retaining frame, a plurality of mounting holes are evenly formed on the retaining frame, steel balls are arranged on the mounting holes, and the diameter of the steel balls is greater than the thickness of the retaining frame.

[0019] Beneficial effects of the utility model:

[0020] After the utility model roughly positions the toothed part by the positioning tooth die, the driving component drives the tensioning component to tighten and position the inner wall of the toothed part, and at the same time the floating component drives the toothed part on the positioning tooth die to adjust the posture for floating compensation. The tensioning component is used to center the toothed part, and the floating reference of the floating component is used to position the toothed part on the positioning tooth die, which well guarantees the distance from the pitch circle of the toothed part to the installation end face. The floating design can compensate for the tooth shape error of the toothed part and solves the problem of abnormal noise after the final assembly of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of a floating reference core expansion fixture of the utility model.

[0022] Figure 2 It is a cross-sectional view of the utility model.

[0023] Figure 3 It is a schematic diagram of the driving component of the utility model.

[0024] Figure 4 This is a schematic diagram of a third floating bearing of the utility model.

[0025] Explanation of the numbers in the figure: 1. Main body; 11. Flange base; 2. Floating assembly; 21. Floating seat; 22. End cover; 23. Floating base; 24. Floating ring; 25. Arc surface; 26. Arc guide surface; 27. First floating bearing; 28. Second floating bearing; 29. ​​Third floating bearing; 291. Retaining frame; 292. Steel ball; 293. Mounting hole; 3. Positioning tooth mold; 31. Positioning block; 32. Positioning groove; 33. Positioning inclined surface; 34. Support surface; 5. Support plate; 51. Clamping surface; 52. Expansion sleeve; 53. Moving groove; 54. Pull ring; 55. Drawing sleeve; 56. Second inclined surface; 57. Drawing rod; 6. Tapered body; 61. First inclined surface; 62. Air outlet; 63. Air flow channel; 64. Air inlet. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0027] Reference Figure 1-4 As shown, a floating reference core expansion fixture includes:

[0028] A body 1, wherein the body 1 is arranged on a flange base 11;

[0029] A floating assembly 2 is arranged on the body 1, and the floating assembly 2 comprises a floating seat 21, and a floating component is arranged on the floating seat 21;

[0030] An inner clamping assembly is arranged on the body 1, and the inner clamping assembly includes a tensioning component and a driving component, the driving component is connected to the tensioning component, a limiting hole is arranged on the floating seat 21, the tensioning component is passed through the limiting hole, and the driving component is used to drive the tensioning component to tighten and position the inner side wall of the toothed part;

[0031] The positioning tooth mold 3 is connected to the floating component, and the positioning tooth mold 3 is concentrically arranged with the tensioning component. The positioning tooth mold 3 is used to position the toothed part, and the floating component drives the toothed part on the positioning tooth mold 3 to adjust its posture for floating compensation.

[0032] After the utility model roughly positions the toothed part by the positioning tooth die 3, the driving component drives the tensioning component to tighten and position the inner wall of the toothed part, and at the same time the floating component drives the toothed part on the positioning tooth die 3 to adjust the posture for floating compensation. The tensioning component is used to center the toothed part, and the floating reference of the floating component is used to position the toothed part on the positioning tooth die 3, which well guarantees the distance from the pitch circle of the toothed part to the installation end face. The floating design can compensate for the tooth shape error of the toothed part and solves the problem of abnormal noise after the final assembly of the product.

[0033] At the same time, a tensioning component is used to center the toothed parts, and the original multi-sequence processing is concentrated in one sequence, saving the transfer time and loading and unloading time between processes; the toothed parts are clamped on all surfaces on the positioning tooth mold 3 at one time, with higher processing accuracy and higher production efficiency.

[0034] The utility model is a floating reference fixture solution specially developed for planetary, half-axle bevel gears and other gear parts. It adopts non-standard plane bearings and spherical ball shafts (first floating bearing 27, second floating bearing 28 and third floating bearing 29) to achieve floating compensation in axial and radial directions, which is equivalent to taking the average value of the highest point and the lowest point of the bevel gear, thus ensuring the installation distance from the pitch circle of the bevel gear to the end face and solving the problem of abnormal noise after the final assembly of the product.

[0035] In one embodiment of the utility model, the tensioning component includes a tapered body 6 and an expansion sleeve 52, the tapered body 6 is arranged on the main body 1, the expansion sleeve 52 is sleeved on the tapered body 6, a first inclined surface 61 is arranged on the outer wall of the tapered body 6, a plurality of support plates 5 are evenly arranged on the expansion sleeve 52, and an expansion gap is provided between adjacent support plates 5, a second inclined surface 56 matching the first inclined surface 61 is arranged on the inner side of the support plate 5, a clamping surface 51 is arranged on the outer side of the support plate 5, and the expansion sleeve 52 is connected to the driving component.

[0036] The fixture is loaded on the processing equipment, and the drawing sleeve 55 is connected to the driving source, and the tooth surface of the toothed part is inserted into the positioning groove 32 of the positioning tooth mold 3, so that the tensioning component is inserted into the toothed part. The driving source drives the drawing sleeve 55 to move in the direction away from the positioning tooth mold 3, thereby driving the expansion sleeve 52 connected to the drawing rod 57 to move, and the second inclined surface 56 on the support plate 5 slides along the first inclined surface 61. Since the tapered body 6 has a conical structure, the support plate 5 on the expansion sleeve 52 is expanded, and the clamping surface 51 on the outer side of the support plate 5 tightens and positions the inner wall of the toothed part. Increasing the diameter of the expansion sleeve 52 allows the clamping surface 51 on the outer wall of the support plate 5 to tighten and position the inner wall of the collar, so that the processing accuracy is higher, ensuring that the processing allowance of subsequent processes is smaller and more uniform, and the processing efficiency is higher.

[0037] In one embodiment of the utility model, an air flow channel 63 is provided in the conical body 6, an air inlet hole 64 is provided on the main body 1, the air flow channel 63 is connected to the air inlet hole 64, and a plurality of air outlet holes 62 are evenly provided on the free end of the conical body 6.

[0038] Specifically, the air flow channel 63 is connected to the air inlet 64, and a plurality of air outlet holes 62 are evenly arranged on the free end of the tapered body 6. Air is blown during dry processing and cutting fluid is sprayed during wet processing, which can ensure rapid processing of toothed parts.

[0039] In one embodiment of the utility model, the driving component includes a pulling sleeve 55, a pulling hole is provided on the main body 1, the pulling sleeve 55 is slidably arranged on the pulling hole, a plurality of pulling rods 57 are provided on the pulling sleeve 55, and the free ends of the pulling rods 57 are connected to the expansion sleeve 52.

[0040] In one embodiment of the utility model, a movable groove 53 is provided on the floating seat 21, and a movement gap is formed between the movable groove 53 and the main body 1. A pull ring 54 is slidably provided on the movable groove 53, and a clamping groove is provided on the pulling rod 57. The clamping groove is clamped on the pull ring 54, the expansion sleeve 52 is connected to the pull ring 54, and the pulling rod 57 drives the pull ring 54 to reciprocate in the movement gap.

[0041] Specifically, the pulling rod 57 drives the pull ring 54 to reciprocate in the movement gap, and the expansion sleeve 52 is connected to the pull ring 54, which can guide the expansion sleeve 52 to move, ensure the movement accuracy, and ensure that multiple support plates 5 synchronously tighten and position the toothed parts.

[0042] In one embodiment of the utility model, the positioning tooth mold 3 includes a positioning seat, on which a plurality of positioning blocks 31 are evenly arranged. The plurality of positioning blocks 31 are arranged on the same circumference, and positioning grooves 32 matching the toothed parts are formed between adjacent positioning blocks 31 .

[0043] Specifically, positioning grooves 32 matching the toothed parts are formed between adjacent positioning blocks 31, so that the teeth of the toothed parts are clamped on the positioning grooves 32, which can make the contact area between the toothed parts and the positioning tooth mold 3 larger. The toothed parts can be automatically centered by relying on the positioning tooth mold 3, and the fixture does not need to be adjusted, which better ensures accuracy and greatly reduces the scrap rate.

[0044] In an embodiment of the utility model, positioning inclined surfaces 33 are provided on both sides of the positioning block 31 , and a supporting surface 34 matching the toothed part is provided between the two positioning inclined surfaces 33 , and the supporting surface 34 and the two positioning inclined surfaces 33 form a trapezoidal structure.

[0045] Specifically, the support surface 34 and the two positioning inclined surfaces 33 form a trapezoidal structure, which facilitates the support of the toothed parts, ensures the supporting effect of the toothed parts, and improves the subsequent processing accuracy.

[0046] In one embodiment of the utility model, the floating component includes a floating ring 24 and a floating base 23, the positioning tooth mold 3 is arranged on the floating base 23, a floating cavity is arranged on the floating seat 21, the floating ring 24 is arranged in the floating cavity, an arc surface 25 is arranged on the floating ring 24, an arc guide surface 26 matching the arc surface 25 is arranged on the floating base 23, and a first floating bearing 27 is arranged between the arc guide surface 26 and the arc surface 25.

[0047] Specifically, the positioning tooth die 3 is connected to the floating component. Since a first floating bearing 27 is provided between the arc guide surface 26 and the arc surface 25, there is a rotation gap therebetween. The floating base 23 connected to the positioning tooth die 3 can move relative to the floating ring 24, so that the center of the positioning tooth die 3 and the toothed part can be tilted and offset to a certain extent. The first floating bearing 27 mainly provides rotation support for the positioning tooth die 3, which is equivalent to averaging the highest and lowest points of the bevel gear (toothed part), thereby ensuring the installation distance from the pitch circle of the bevel gear to the end face and solving the problem of abnormal noise after the final assembly of the product.

[0048] In one embodiment of the utility model, the floating component further includes a second floating bearing 28 and a third floating bearing 29 , wherein the second floating bearing 28 is arranged between the floating ring 24 and the end cover 22 of the floating seat 21 , and the third floating bearing 29 is arranged between the floating ring 24 and the floating seat 21 .

[0049] Specifically, a second floating bearing 28 and a third floating bearing 29 are provided on both sides of the floating ring 24, so that there is a floating gap between the floating ring 24 and the floating seat 21, which compensates for the position of the floating ring 24, making the positioning tooth mold 3 clamping the shaft more stable and the processing accuracy higher.

[0050] In one embodiment of the utility model, the first floating bearing 27, the second floating bearing 28 and the third floating bearing 29 have the same structure. The first floating bearing 27 includes a retaining frame 291, and a plurality of mounting holes 293 are evenly formed on the retaining frame 291. Steel balls 292 are arranged on the mounting holes 293, and the diameter of the steel balls 292 is greater than the thickness of the retaining frame 291.

[0051] Specifically, since the first floating bearing 27 is located on the arc surface 25, and the second floating bearing 28 and the third floating bearing 29 are located on the plane, the retaining frame 291 is adaptively changed to a arc surface structure or a plane structure. The retaining frame 291 is used to position the steel ball 292. The diameter of the steel ball 292 is greater than the thickness of the retaining frame 291, so that there can be a certain amount of movable clearance on both sides of the steel ball 292, which plays a role in posture compensation for the floating ring 24.

[0052] Usage Process

[0053] The fixture is loaded on the processing equipment, and the drawing sleeve 55 is connected to the driving source, and the tooth surface of the toothed part is inserted into the positioning groove 32 of the positioning tooth mold 3, so that the tensioning component is inserted into the toothed part. The driving source drives the drawing sleeve 55 to move in the direction away from the positioning tooth mold 3, thereby driving the expansion sleeve 52 connected to the drawing rod 57 to move, and the second inclined surface 56 on the support plate 5 slides along the first inclined surface 61. Since the tapered body 6 is a cone structure, the support plate 5 on the expansion sleeve 52 is expanded, and the clamping surface 51 on the outer side of the support plate 5 tightens and positions the inner side wall of the toothed part. At the same time, the positioning tooth mold 3 is connected to the floating component. Since the arc-shaped guide surface 26 is connected to the arc-shaped guide surface 26, the arc-shaped guide surface 26 is connected to the arc-shaped guide surface 26. A first floating bearing 27 is arranged between the surfaces 25, so that there is a rotational gap therebetween. The floating base 23 connected to the positioning tooth mold 3 can move relative to the floating ring 24, so that the center of the positioning tooth mold 3 and the toothed parts can be tilted and offset to a certain extent. At the same time, a second floating bearing 28 and a third floating bearing 29 are arranged on both sides of the floating ring 24, so that there is a floating gap between the floating ring 24 and the floating seat 21, which compensates for the posture of the floating ring 24, makes the positioning tooth mold 3 clamp the shaft more stable, and has higher processing accuracy, thereby realizing the posture adjustment of the toothed parts on the positioning tooth mold 3 for floating compensation.

[0054] The above-described embodiments are only preferred embodiments for fully illustrating the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or changes made by technicians in the technical field on the basis of the present utility model are all within the protection scope of the present utility model. The protection scope of the present utility model shall be subject to the claims.

Claims

1. A floating reference core expansion fixture, characterized in that: include: A body, wherein the body is arranged on a flange base; A floating assembly is arranged on the main body, the floating assembly comprises a floating seat, and a floating component is arranged on the floating seat; An inner clamping assembly is arranged on the body, the inner clamping assembly comprises a tensioning component and a driving component, the driving component is connected to the tensioning component, a limiting hole is arranged on the floating seat, the tensioning component is passed through the limiting hole, and the driving component is used to drive the tensioning component to tighten and position the inner side wall of the toothed part; The positioning tooth die is connected to the floating component, and the positioning tooth die is concentrically arranged with the tensioning component. The positioning tooth die is used to position the toothed part, and the floating component drives the toothed part on the positioning tooth die to adjust its posture for floating compensation.

2. The floating reference core expansion fixture according to claim 1, characterized in that: The tensioning component includes a tapered body and an expansion sleeve, the tapered body is arranged on the main body, the expansion sleeve is arranged on the tapered body, a first inclined surface is arranged on the outer wall of the tapered body, a plurality of support plates are evenly arranged on the expansion sleeve, and an expansion gap is provided between adjacent support plates, a second inclined surface matching the first inclined surface is arranged on the inner side of the support plate, a clamping surface is arranged on the outer side of the support plate, and the expansion sleeve is connected to the driving component.

3. The floating reference core expansion fixture according to claim 2, characterized in that: An air flow channel is arranged in the conical body, an air inlet hole is arranged on the main body, the air flow channel is communicated with the air inlet hole, and a plurality of air outlet holes are evenly arranged on the free end of the conical body.

4. The floating reference core expansion fixture according to claim 2, characterized in that: The driving component comprises a drawing sleeve, a drawing hole is arranged on the body, the drawing sleeve is slidably arranged on the drawing hole, a plurality of drawing rods are arranged on the drawing sleeve, and the free ends of the drawing rods are connected to the expansion sleeve.

5. The floating reference core expansion fixture according to claim 4, characterized in that: A movable groove is provided on the floating seat, and a movement gap is formed between the movable groove and the main body. A pull ring is slidably provided on the movable groove. A clamping groove is provided on the pulling rod, and the clamping groove is clamped on the pull ring. The expansion sleeve is connected to the pull ring, and the pulling rod drives the pull ring to reciprocate in the movement gap.

6. The floating reference core expansion fixture according to claim 1, characterized in that: The positioning tooth mold comprises a positioning seat, on which a plurality of positioning blocks are evenly arranged. The plurality of positioning blocks are arranged on the same circumference, and positioning grooves matching the toothed parts are formed between adjacent positioning blocks.

7. The floating reference core expansion fixture according to claim 6, characterized in that: Positioning inclined surfaces are arranged on both sides of the positioning block, a supporting surface matching the toothed part is arranged between the two positioning inclined surfaces, and the supporting surface and the two positioning inclined surfaces form a trapezoidal structure.

8. The floating reference core expansion fixture according to claim 1, characterized in that: The floating component includes a floating ring and a floating base, the positioning tooth mold is arranged on the floating base, the floating seat is provided with a floating cavity, the floating ring is arranged in the floating cavity, the floating ring is provided with an arc surface, the floating base is provided with an arc guide surface matching the arc surface, and a first floating bearing is provided between the arc guide surface and the arc surface.

9. The floating reference core expansion fixture according to claim 8, characterized in that: The floating component further comprises a second floating bearing and a third floating bearing, wherein the second floating bearing is arranged between the floating ring and the end cover of the floating seat, and the third floating bearing is arranged between the floating ring and the floating seat.

10. The floating reference core expansion fixture according to claim 9, characterized in that: The first floating bearing, the second floating bearing and the third floating bearing have the same structure. The first floating bearing comprises a retaining frame, a plurality of mounting holes are evenly formed on the retaining frame, steel balls are arranged on the mounting holes, and the diameter of the steel balls is greater than the thickness of the retaining frame.

Images