Hobbing clamp structure for shaft gear parts

Abstract

The utility model discloses a gear hobbing clamp structure for shaft gear parts. The gear hobbing clamp structure comprises a body, a pull rod, a connecting disc, an expansion sleeve, a conical ring, a supporting seat, a tip and a centering sleeve, the body can be connected with a gear hobbing machine tool through the adapter plate. The lower part of the pull rod can move up and down after being connected with an oil cylinder interface in a machine tool; the connecting disc is connected with the pull rod; the lower part of the expansion sleeve can be clamped with the inner wall of the connecting disc to move up and down along with the pull rod and the connecting disc; the upper part of the expansion sleeve is of a multi-petal structure; the conical ring can be matched to tension or loosen the expansion sleeve when the expansion sleeve moves up and down; the center can support the shaft tooth part to be machined in the expansion sleeve, the lower portion of the center is located in the center through hole of the body, and the center is connected with the body. And the centering cover is arranged outside the conical ring and is connected with the supporting seat. According to the utility model, the pull rod moves up and down, the expansion sleeve is pulled to expand, loosen and clamp a part for hobbing on a numerical control machine tool, the clamping force provided for the workpiece is larger, and the machining efficiency is improved by increasing the rotating speed of the machine tool for feeding.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the axle tooth class spare machine adds technical field relates to a kind of axle tooth class spare hobbing fixture structure. BACKGROUND

[0002] Clamp is widely used in mechanical and non-mechanical machining process, in addition to machine tool, clamp is the most influential to the quality of machined parts. At present, the types of clamp used are: manual clamp, hydraulic clamp, electric clamp, pneumatic clamp, electromagnetic hydraulic combined clamp. The gear hobbing of axle tooth class parts is usually carried out by end driving center clamping workpiece, the clamping force is relatively small, and the rotation speed and feed cannot be improved during actual machining, so the advantages of machine tool cannot be brought into play, resulting in waste of machine tool utilization, and manual assistance is required during clamping process, especially for heavy and large axle tooth class parts, manual clamping is labor-intensive and low in production efficiency. SUMMARY

[0003] In view of the deficiencies in the prior art, the utility model aims to provide a kind of axle tooth class spare hobbing fixture structure, to solve the problem of unstable end driving clamping process of existing axle tooth class spare hobbing and low production efficiency.

[0004] To solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A kind of axle tooth class spare hobbing fixture structure, including body, pull rod, connecting disc, expansion sleeve, taper ring, support seat, center and centering sleeve;

[0006] The body is disc-shaped and has a central through-hole, and the body can be connected to a hobbing machine through an adapter disc;

[0007] The pull rod is coaxial with the body and located below the body, and the lower part of the pull rod can be connected to the oil cylinder interface in the machine tool to move up and down;

[0008] The connecting disc is provided with a through-hole in the center, and is connected to the pull rod through a bolt penetrating the body;

[0009] The lower part of the expansion sleeve can be clamped with the inner wall of the connecting disc to move up and down with the pull rod and the connecting disc;The upper part of the expansion sleeve is a multi-petal structure, and the structure is provided with the taper ring outside, the taper ring is supported by the support seat on the main body, and the taper ring is tightened or loosened when the expansion sleeve moves up and down;

[0010] The tip of the center is upward to support the axle tooth class part to be machined in the expansion sleeve, and the lower part of the center is located in the central through-hole of the body, and the center is connected to the body;

[0011] The centering sleeve is provided with a through-hole in the center, coaxially covers the taper ring outside, and is connected to the support seat.

[0012] The utility model discloses still include following technical features:

[0013] Specifically, the top surface of the body is coaxial first ring table, second ring table and third ring table from the center to the outside; the center of the first ring table is the center through hole of the body, and the axial hole is arranged on the first ring table to install the bolt capable of connecting the center and the body; the axial hole is arranged on the second ring table, and the guide sleeve is arranged in the axial hole to pass the bolt connecting the connecting rod and the connecting disc; the outer edge side wall of the second ring table is opposite to the outer wall of the connecting disc; the plurality of axial holes are arranged on the third ring table to install the bolt capable of connecting the body and the adapter disc and the bolt capable of connecting the body and the support seat.

[0014] Specifically, the connecting rod includes the connecting plate at the top and the rod body below the connecting plate; the bolt hole is arranged on the connecting plate to be connected with the connecting disc bolt; the concave groove structure is arranged below the rod body to be connected with the internal structure of the machine tool.

[0015] Specifically, the center includes the tip at the top, the connecting ring at the middle and the column at the lower end; the bolt hole is arranged on the connecting ring to be connected with the body through the bolt; the column can be arranged in the center through hole of the body.

[0016] Specifically, the taper surface on the upper part of the expansion sleeve and the taper ring adopt high-precision taper self-locking structure, and can form progressive close fit under the action of axial pressure; the grooves of the multi-petal structure on the upper part of the expansion sleeve are filled with silica gel, which can adaptively compensate the gap in work, so that the expansion sleeve can be expanded and loosened.

[0017] Specifically, the expansion sleeve is processed with the anti-rotation groove and is fixed with the support seat through the cylindrical head screw.

[0018] Specifically, the outer wall of the expansion sleeve is provided with the convex ring at the middle and three convex bosses distributed in the circumference at the lower part; the inner wall of the connecting disc is provided with three convex bosses distributed in the circumference; after the lower part of the expansion sleeve is coaxially inserted into the center through hole of the connecting disc, the three convex bosses on the inner wall of the connecting disc can be buckled between the three convex bosses and the convex ring of the expansion sleeve, so that the expansion sleeve can be driven up and down by the connecting disc.

[0019] Specifically, the bolt hole is arranged on the centering sleeve to be connected with the support seat through the bolt; the centering sleeve is gap-fitted with the taper ring.

[0020] Compared with the prior art, the utility model has the following technical effects:

[0021] The shaft tooth part hobbing clamp structure provided by the utility model moves up and down through the connecting rod, expands and loosens the expansion sleeve, clamps the part to be machined on the numerical control machine tool, provides relatively large clamping force for the workpiece, and improves the machining efficiency by improving the machine tool speed and feed.

[0022] The gear hobbing clamp has simple structure, reasonable technology, convenient operation, good fixing effect, can greatly improve production and processing efficiency, is flexible and convenient to use, has wide application range, has high interchangeability and can be assembled through quick change structure.

[0023] In the utility model, the pull rod moves up and down, and drives the up and down movement of the expansion sleeve; meanwhile, the detachable structure of the expansion sleeve can replace the suitable expansion sleeve according to the clamping diameter of the shaft gear.

[0024] In the utility model, the body, the supporting seat, the connecting disc and the center are detachably connected, and the gear hobbing can be carried out on the shaft tooth parts with different lengths and different sizes. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the structure sectional view of the gear hobbing clamp.

[0026] Figure 2 It is the structure schematic view of the gear hobbing clamp.

[0027] Figure 3 It is the plan view of the gear hobbing clamp.

[0028] Figure 4 It is the centering sleeve schematic view of the gear hobbing clamp.

[0029] Figure 5 It is the expansion sleeve schematic view of the gear hobbing clamp.

[0030] Figure 6 It is the taper ring schematic view of the gear hobbing clamp.

[0031] Figure 7 It is the supporting seat schematic view of the gear hobbing clamp.

[0032] Figure 8 It is the body schematic view of the gear hobbing clamp.

[0033] Figure 9 It is the guide sleeve schematic view of the gear hobbing clamp.

[0034] Figure 10 It is the center schematic view of the gear hobbing clamp.

[0035] Figure 11 It is the pull rod schematic view of the gear hobbing clamp.

[0036] Figure 12 It is the connecting disc schematic view of the gear hobbing clamp.

[0037] The meanings of various reference numerals in the drawing are as follows:

[0038] 1. centering sleeve, 2. expansion sleeve, 3. taper ring, 4. support seat, 5. inner hexagonal cylindrical head screw 7. body, 8. guide sleeve, 9. center, 11. pull rod, 14. connecting disc, 15. inner hexagonal cylindrical end set screw. DETAILED DESCRIPTION

[0039] The utility model discloses a gear hobbing fixture based on the gear hobbing fixture (end drive type, expansion sleeve type) structure as the breakthrough, designs a kind of expansion sleeve type gear hobbing fixture, it is suitable for the clamping requirement of a kind of shaft parts, simultaneously matching machine connection, operability is strong, simultaneously clamping force is relatively big, clamping process is relatively stable, precision is relatively high.

[0040] The specific embodiments of the utility model are given below, it is explained that the utility model is not limited to the following specific embodiments, equivalent transformation on the basis of the technical scheme of the application all falls into the protection scope of the utility model.

[0041] Example 1:

[0042] As Figures 1 to 12 The utility model discloses a gear hobbing fixture structure of shaft tooth class spare, including body 7, pull rod 11, connecting disc 14, expansion sleeve 2, taper ring 3, support seat 4, center 9 and centering sleeve 1.

[0043] Body 7 is disc-shaped and center through-hole, body 7 can be connected with gear hobbing machine through adapter disc, and the connection of different machine tools can be through different adapter discs.

[0044] Pull rod 11 is coaxial with body 7 and is located below body 7, and the lower part of pull rod 11 can be connected with the inner cylinder interface of machine tool and then moves up and down.

[0045] Connecting disc 14 is provided with a through-hole in the center, and is connected with pull rod 11 through the bolt penetrating body 7.

[0046] The lower part of expansion sleeve 2 can be clamped with the inner wall of connecting disc 14 to move up and down with pull rod 11 and connecting disc 14, and the upper part of expansion sleeve 2 is a multi-petal structure, and the structure is provided with taper ring 3, taper ring 3 is supported by support seat 4 on the main body below, and taper ring 3 can be cooperated to tighten or loosen expansion sleeve 2 when moving up and down.

[0047] The sharp part of center 9 faces upwards to support the shaft tooth class spare to be processed in expansion sleeve 2, and the lower part of center 9 is located in the center through-hole of body 7, and center 9 is connected with body 7.

[0048] Centering sleeve 1 is provided with a through-hole in the center, coaxially covers taper ring 3 outside, and is connected with support seat 4.

[0049] The top surface of the body 7 is sequentially provided with coaxial first, second and third ring tables from the center to the outside. The center of the first ring table is a center through hole of the body 7, and an axial hole is arranged on the first ring table to mount a bolt capable of connecting the center tip 9 and the body 7. The second ring table is provided with an axial hole and a guide sleeve 8 arranged in the axial hole to enable a bolt connecting the pull rod 11 and the connecting disc 14 to pass through. The outer edge side wall of the second ring table is opposite to the outer wall of the connecting disc 14. The third ring table is provided with a plurality of axial holes to mount bolts capable of connecting the body 7 and the adapter disc, and bolts capable of connecting the body 7 and the support seat 4.

[0050] The pull rod 11 includes a connecting plate at the top and a rod body below the connecting plate. The connecting plate is provided with a bolt hole to be bolted with the connecting disc 14. The rod body is provided with a groove structure below to be connected with the internal structure of the machine tool.

[0051] The center tip 9 includes a tip at the top, a connecting ring at the middle and a column at the lower end. The connecting ring is provided with a bolt hole to be connected with the body 7 through a bolt. The column can be arranged in the center through hole of the body 7. The connecting ring at the middle is arranged on the first ring table.

[0052] The outer conical surface of the expansion sleeve 2 is provided with a high-precision taper self-locking structure with the taper ring 3, which can form a gradual tight fit under the action of axial pressure. The grooves of the multi-flap structure of the upper part of the expansion sleeve 2 are filled with silica gel to form an intelligent compensation system, which can adaptively compensate for the gap during work, so that the expansion sleeve 2 can be tightened and loosened. Due to the downward movement of the expansion sleeve 2, the inner conical surface of the fixed taper ring 3 causes the expansion sleeve 2 to shrink, and then the inner hole of the expansion sleeve 2 becomes smaller, clamping and fixing the parts.

[0053] The expansion sleeve 2 is processed with an anti-rotation groove, which is fixed with the support seat 4 through a screw, specifically an inner hexagonal cylindrical end set screw 15.

[0054] The outer wall of the expansion sleeve 2 is provided with a convex ring at the middle, and the lower part of the outer wall of the expansion sleeve 2 is provided with three circumferentially distributed protrusions. The inner wall of the connecting disc 14 is provided with three circumferentially distributed protrusions. After the lower part of the expansion sleeve 2 is coaxially inserted into the center through hole of the connecting disc 14, the three protrusions on the inner wall of the connecting disc 14 can be buckled between the three protrusions and the convex ring of the expansion sleeve 2, so as to drive the expansion sleeve 2 to move up and down through the connecting disc 14. This structure not only ensures sufficient wedge tightness, but also ensures the convenience of separation operation.

[0055] All fixed connections are detachable connections, and all connections are matched to ensure certain shape and position tolerance requirements.

[0056] The centering sleeve 1 is provided with a bolt hole to be connected with the support seat 4 through a bolt. The centering sleeve 1 is gap-fitted with the taper ring 3.

[0057] The above-mentioned bolt is an inner hexagonal cylindrical head screw 5.

[0058] In specific work:

[0059] The hobbing fixture is fixed on the numerical control hobbing machine through the body and through the bolts, the whole fixture is only installed once by the worker, and the subsequent installation is not needed again, and only the parts needing machining and the machined parts need to be installed and removed each time, and the main components are assembled when the fixture is installed on the machine tool.

[0060] When the parts are installed, the worker inserts the parts into the expansion sleeve, the tailstock plays a supporting role, the parts are supported, the machine tool is operated by the worker, the internal components of the machine tool are connected with the pull rod through the mechanical structure, the pull rod can move downward, and the guide sleeve slides in the body, the connecting disc is driven to move downward, so that the expansion sleeve also moves downward, the outer conical surface of the expansion sleeve is matched with the inner conical surface of the conical ring, the fixed inner conical surface of the conical ring makes the expansion sleeve shrink, and then the inner hole of the expansion sleeve becomes smaller, the parts are clamped and fixed, and the process of clamping the parts by the fixture is controlled by the machine tool, and the operator only needs to operate the machine tool.

[0061] The preferred embodiments of the utility model are described in detail in combination with the drawings, but the utility model is not limited to the specific details in the above embodiments, and various simple modifications can be made to the technical scheme of the utility model within the technical concept of the utility model, and the simple modifications all belong to the protection scope of the utility model.

[0062] In addition, it should be noted that various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, various possible combination manners are not described again in the utility model.

[0063] In addition, various different embodiments of the utility model can also be combined in any manner, as long as it does not deviate from the technical concept of the utility model, and it should also be regarded as the disclosed content of the utility model.

Claims

1. A hobbing fixture structure for shaft gear parts, characterized in that, It includes the main body (7), tie rod (11), connecting plate (14), expansion sleeve (2), cone ring (3), support base (4), center (9) and centering sleeve (1); The body (7) is disc-shaped with a central through hole, and the body (7) can be connected to the gear hobbing machine through the adapter plate; The pull rod (11) is coaxial with the body (7) and located below the body (7). The lower part of the pull rod (11) can be connected to the oil cylinder interface inside the machine tool and move up and down. The connecting plate (14) has a through hole in the center and is connected to the tie rod (11) by a bolt that passes through the body (7); The lower part of the expansion sleeve (2) can be engaged with the inner wall of the connecting plate (14) so ​​that it can move up and down with the pull rod (11) and the connecting plate (14); the upper part of the expansion sleeve (2) is a multi-lobed structure and the conical ring (3) is sleeved on the structure. The conical ring (3) is supported by the support seat (4) located on the main body. The conical ring (3) can cooperate to tighten or loosen the expansion sleeve (2) when it moves up and down. The tip of the tip (9) faces upward to support the gear parts to be processed inside the expansion sleeve (2). The lower part of the tip (9) is located in the central through hole of the body (7). The tip (9) is connected to the body (7). The centering sleeve (1) has a central through hole, which coaxially covers the outside of the cone ring (3) and is connected to the support base (4).

2. The hobbing fixture structure for shaft gear parts as described in claim 1, characterized in that, The top surface of the body (7) consists of a first ring platform, a second ring platform, and a third ring platform, arranged coaxially from the center outwards. The center of the first ring platform is the central through hole of the body (7). An axial hole is provided on the first ring platform to install bolts that can connect the tip (9) and the body (7). An axial hole is provided on the second ring platform, and a guide sleeve (8) is provided inside it to allow bolts that connect the tie rod (11) and the connecting plate (14) to pass through. The outer edge sidewall of the second ring platform is opposite to the outer wall of the connecting plate (14). Multiple axial holes are provided on the third ring platform to install bolts that can connect the body (7) and the adapter plate, as well as bolts that can connect the body (7) and the support base (4).

3. The hobbing fixture structure for shaft gear parts as described in claim 1, characterized in that, The tie rod (11) includes a connecting plate at the top and a rod body at the bottom; the connecting plate is provided with bolt holes for bolt connection with the connecting disc (14); the bottom of the rod body is a groove-shaped structure, which is used to connect with the internal structure of the machine tool.

4. The hobbing fixture structure for shaft gear parts as described in claim 1, characterized in that, The tip (9) includes an upper tip, a middle connecting ring, and a lower column; the connecting ring has bolt holes for connection with the body (7) by bolts; the column can be placed in the central through hole of the body (7).

5. The hobbing fixture structure for shaft gear parts as described in claim 1, characterized in that, The upper outer conical surface of the expansion sleeve (2) and the conical ring (3) adopt a high-precision taper self-locking structure, which can form a progressive tight fit under axial pressure; the grooves of the multi-lobed structure on the upper part of the expansion sleeve (2) are filled with silicone, which can adaptively compensate for the gap during operation, so that the expansion sleeve (2) can be tightened and loosened.

6. The hobbing fixture structure for shaft gear parts as described in claim 1, characterized in that, The expansion sleeve (2) is machined with anti-rotation grooves and is fixed to the support base (4) by screws.

7. The hobbing fixture structure for shaft gear parts as described in claim 1, characterized in that, The outer wall of the expansion sleeve (2) has a convex ring in the middle, and the lower part of the outer wall of the expansion sleeve (2) has three circumferentially distributed protrusions; the inner wall of the connecting plate (14) has three circumferentially distributed protrusions; after the lower part of the expansion sleeve (2) is coaxially inserted into the central through hole of the connecting plate (14), the three protrusions on the inner wall of the connecting plate (14) can be locked between the three protrusions and the convex ring of the expansion sleeve (2), so as to drive the expansion sleeve (2) to move up and down through the connecting plate (14).

8. The hobbing fixture structure for shaft gear parts as described in claim 1, characterized in that, The centering sleeve (1) is provided with bolt holes for connection to the support base (4) by bolts; the centering sleeve (1) and the cone ring (3) are fitted with a clearance.

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