A radial automatic locking rotation mechanism

Abstract

The utility model discloses a radial automatic locking rotation mechanism, comprising a cylinder, a rotating assembly and a pull rod arranged above the cylinder, the pull rod contacts the bottom of a spring chuck through a pull rod seat, a compression spring is sleeved on the lower part of the pull rod, a seat body is sleeved on the outer sleeve of the spring chuck, and a positioning limit plate is connected to the upper end of the seat body; the spring chuck comprises a rigid chuck member for the pull rod to pass through and an elastic claw member sleeved on the upper end of the rigid chuck member, a multi-petal deformable conical portion is arranged on the upper end of the rigid chuck member, an abutment portion that is locked with the conical portion is arranged on the inner wall of the seat body; the upper and lower ends of the rigid chuck member are respectively connected to the seat body and the pull rod seat. The utility model arranges mutually matching positioning limit plates, spring chucks and seat bodies, so that the conical portion is closed and locked in the abutment portion, thereby completing the fixing of the hub bearing, solving the problem that conventional sleeve-type clamps cannot ensure radial automatic locking of the hub bearing and have poor processing accuracy during subsequent high-speed rotation.

Description

Technical Field

[0001] The utility model relates to the field of parts clamping, in particular to a radial automatic locking rotation mechanism. Background Art

[0002] At present, automated quenching machine tools generally need to install special fixtures for different quenching parts, and the workpiece automatic clamping mechanism is a fixture designed to improve the working efficiency of automated quenching machine tools. When the wheel hub bearing is working, the specific areas of its inner flange and outer ring parts are subjected to great friction and impact. Under such working conditions, these specific areas are easily worn, so these easily worn areas of the inner flange and outer ring parts in the wheel hub bearing require certain strength and toughness, and the surface should also have certain wear resistance. The quenching heat treatment of the easily worn areas of the inner flange and outer ring parts of the wheel hub bearing can greatly improve its mechanical properties. In the automatic quenching production line of the wheel hub bearing, the inner flange or outer ring parts need to be quenched, and the inner flange or outer ring parts are transported from the feeding conveying mechanism to the lower center tooling that can rotate at high speed inside the quenching machine by a robot, and then the motor drives the fixture to rotate to realize the quenching function. The tolerance range of the outer diameter clamping surface of the existing inner flange or outer ring parts is very large, and conventional sleeve-type clamps cannot ensure radial automatic locking of the hub bearing, resulting in poor processing accuracy of the hub bearing during subsequent high-speed rotation.

[0003] Therefore, it is urgent to propose a new solution to solve the above problems. Summary of the invention

[0004] The utility model provides a radial automatic locking rotation mechanism, which solves the problem in the prior art that the tolerance range of the outer diameter clamping surface of the inner flange or outer ring part of the wheel hub bearing is very large, and the conventional sleeve type clamp cannot ensure the radial automatic locking of the wheel hub bearing, resulting in poor processing accuracy during subsequent high-speed rotation.

[0005] The utility model provides a radial automatic locking rotation mechanism, comprising a cylinder, a rotation assembly arranged above the cylinder, a pull rod arranged in the middle of the rotation assembly, the pull rod contacts the bottom of a spring chuck through a pull rod seat, and a seat body is arranged on the outer sleeve of the spring chuck;

[0006] The spring chuck comprises a rigid chuck member through which a pull rod can pass and an elastic claw member sleeved on the upper end of the rigid chuck member, the upper end of the elastic claw member is provided with a multi-petal deformable conical portion, the inner wall of the seat body is provided with an abutment portion that is locked with the conical portion, the lower part of the pull rod is sleeved with a compression spring, and the upper end of the seat body is connected to a positioning limit plate;

[0007] The upper and lower ends of the rigid clamping head are respectively connected to the seat body and the pull rod seat.

[0008] Furthermore, the rigid chuck member includes a large diameter portion, a small diameter portion and a middle diameter portion coaxially arranged in sequence from top to bottom, the pull rod seat includes an inverted T-stage portion that is concave-convexly matched with the small diameter portion and the middle diameter portion, and the lower end of the inverted T-stage portion is provided with a first fastener for fixing the pull rod seat and the rigid chuck member.

[0009] Furthermore, the elastic claw member also includes a cylindrical portion in an annular shape fixedly arranged below the conical portion, and a bottom plate fixedly arranged at the bottom end of the cylindrical portion, the abutting portion includes an inclined inner wall corresponding to the conical portion and a vertical inner wall corresponding to the cylindrical portion, the cylindrical portion can move up and down along the inner wall of the large diameter portion, and the top end of the pull rod passes through the pull rod seat and the rigid clamping head member in sequence to abut against the bottom surface of the bottom plate.

[0010] Furthermore, the seat body includes a horizontally arranged first seat body portion and a vertically arranged second seat body portion, wherein the first seat body portion is detachably connected to the positioning limit plate via a second fastener, and the second seat body portion is detachably connected to the rigid clamping member via a third fastener.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model arranges a pull rod, a seat body, a compression spring, a cylinder, a rotating assembly, a rigid clamping head part and an elastic claw part which cooperate with each other. Firstly, the pull rod is pushed upward by the cylinder to complete the placement of the wheel hub bearing, and then the pull rod is driven downward by the resilience of the compression spring. Then, the elastic claw part and the wheel hub bearing fall downward together under the action of gravity, and then the tapered part is closed and locked in the abutting part, thereby completing the fixing of the wheel hub bearing, solving the problem that conventional sleeve-type clamps cannot ensure radial automatic locking of the wheel hub bearing and have poor processing accuracy during subsequent high-speed rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional view of a radial automatic locking rotating mechanism of the utility model;

[0014] Figure 2 for Figure 1 The enlarged schematic diagram at A in the middle;

[0015] Figure 3 This is the front view of the spring chuck of the utility model;

[0016] Figure 4 It is a cross-sectional view of the spring chuck of the utility model;

[0017] Figure 5 It is a top view of the spring chuck of the utility model;

[0018] Figure numerals: 1. wheel hub bearing; 2. positioning limit plate; 3. seat body; 31. abutment portion; 311. inclined inner wall; 312. vertical inner wall; 32. first seat body portion; 33. second seat body portion; 4. spring chuck; 41. elastic claw member; 411. conical portion; 412. cylindrical portion; 42. rigid chuck member; 421. large diameter portion; 422. small diameter portion; 423. middle diameter portion; 51. first fastener; 52. second fastener; 53. third fastener; 6. rotating assembly; 71. pull rod; 711. compression spring; 72. pull rod seat; 721. inverted T-stage portion; 8. synchronous wheel; 9. cylinder. DETAILED DESCRIPTION

[0019] In order to further understand the content, features and functions of the utility model, the following embodiments are given, together with the attached Figures 1 to 5 The detailed instructions are as follows.

[0020] like Figure 1 and 2 As shown, this embodiment provides a radial automatic locking rotation mechanism, including a cylinder 9 arranged at the bottom, a pull rod 71 movable up and down is arranged above the piston rod of the cylinder 9, a rotating assembly 6 is sleeved on the pull rod 71, a compression spring 711 is sleeved on the lower part of the pull rod 71, the bottom end of the compression spring 711 is fixedly arranged on the surface of the pull rod 71 by welding, the upper end of the compression spring 711 is abutted against the lower end surface of the rotating assembly 6, a synchronous wheel 8 is fixedly arranged at the lower end of the rotating assembly 6 by welding, a spring chuck 4 is provided with a seat body 3, and the seat body 3 is arranged on the upper part of the rotating assembly 6. A plurality of bearings and a rotating shaft are installed in the rotating assembly 6, and the above-mentioned synchronous wheel 8 is installed on the rotating shaft.

[0021] In this embodiment, Figure 2 As shown, the above-mentioned spring chuck 4 includes a rigid chuck member 42 for the pull rod 71 to pass through and an elastic claw member 41 sleeved on the upper end of the rigid chuck member 42, the upper end of the elastic claw member 41 is provided with a multi-petal deformable conical portion 411, and the inner wall of the seat body 3 is provided with an abutment portion 31 that locks with the conical portion 411; the rigid chuck member 42 is connected to the seat body 3, and the lower end of the rigid chuck member 42 is detachably connected to the pull rod seat 72, and the upper end of the seat body 3 is connected with a positioning limit plate 2, which is used to limit the up and down movement of the conical portion 411 on the one hand, and to perform efficient, accurate and reliable radial locking of the wheel hub bearing on the other hand.

[0022] The utility model firstly drives the pull rod and the elastic claw member to move upward in sequence through the cylinder, so that the elastic claw member 41 changes from a closed state to an open state. At this time, the compression spring 711 is in a compressed state, and the wheel hub bearing 1 to be quenched is placed in the elastic claw member 41; then, under the action of the rebound force of the compression spring 711, the pull rod 71 is driven downward by the rebound force of the compression spring 711, and then the elastic claw member 41 and the wheel hub bearing 1 fall downward together under the action of gravity, and then the tapered portion 41 of the elastic claw member 41 1 is closed and locked in the abutment portion 31 of the seat body 3, thereby completing the fixing work of the wheel hub bearing 1. At this time, the tapered portion changes from an open and closed state to a closed state, thereby completing the radial automatic locking of the wheel hub bearing. Then the synchronous wheel 8 is driven by the motor to rotate, thereby driving the rotating shaft to rotate at a high speed, and the wheel hub bearing 1, the seat body 3, the limit positioning limit plate 2 and the elastic claw member 41 also rotate at a high speed. After completing the processing work, the cylinder repeats the above tooling, then removes the processed wheel hub bearing, and puts in the wheel hub bearing to be processed again.

[0023] After the elastic claws of the spring chuck of the utility model radially lock the hub bearing workpiece, the quenching function can be achieved by high-speed rotation driven by a motor, which solves the problem that conventional sleeve-type clamps cannot ensure radial automatic locking of the hub bearing and have poor processing accuracy during subsequent high-speed rotation. The use of the spring chuck in an automated quenching machine can greatly improve the quenching efficiency of the inner flange and outer ring parts of the hub bearing.

[0024] In this embodiment, Figures 2 to 4 As shown, the rigid clamping member 42 includes a large diameter portion 421, a small diameter portion 422 and a middle diameter portion 423 which are coaxially arranged from top to bottom. Preferably, the three are manufactured by integral molding, wherein the outer diameters of the small diameter portion 422, the middle diameter portion 423 and the large diameter portion 421 increase in sequence, and the tie rod seat 72 includes an inverted T-stage portion 721 which is concavely matched with the small diameter portion 422 and the middle diameter portion 423, thereby ensuring the relative fixation of the tie rod seat 72 and the rigid clamping member 42. The lower end of the inverted T-stage portion 721 is provided with a first fastener 51 for fixing and connecting the tie rod seat 72 and the rigid clamping member 42, and the side end of the inverted T-stage portion 721 is provided with a threaded hole for the first fastener 51 to be screwed in. The first fastener 51 is preferably a bolt, and its end abuts against the outer circumferential surface of the large diameter portion 421.

[0025] In this embodiment, Figures 3 to 5As shown, the elastic claw member 41 also includes a cylindrical portion 412 in an annular shape fixedly arranged below the conical portion 411 by welding, and a bottom plate 413 fixedly arranged at the bottom end of the cylindrical portion 412 by welding. The conical portion 411 and the cylindrical portion 412 are provided with clearance grooves, which are evenly distributed in a circumference. The conical portion 411, the cylindrical portion 412 and the bottom plate 413 are integrally formed by processing. The above-mentioned abutment portion 31 includes an inclined inner wall 311 corresponding to the conical portion 411 and a vertical inner wall 312 corresponding to the cylindrical portion 412. The cylindrical portion 412 can move up and down along the inner wall of the large diameter portion 421. The top end of the pull rod 71 passes through the pull rod seat 72 and the rigid clamping head member 42 in turn, thereby abutting against the bottom surface of the bottom plate 413. In addition, an opening for the pull rod 71 to pass through is provided in the middle of the pull rod seat 72, and a through hole for the pull rod 71 to pass through is provided in the middle of the rigid clamping head member 42. When the pull rod 71 moves upward, the tapered portion 411 leaves the vertical inner wall 312 and enters the inclined inner wall 311; when the pull rod 71 moves downward, the tapered portion 411 leaves the inclined inner wall 311 and enters the vertical inner wall 312. Since the seat body 3 is a rigid component and the elastic claw member 41 is an elastic component, the wheel hub bearing 1 can be released and locked.

[0026] In this embodiment, Figure 1 and 2 As shown, the seat body 3 is a hollow structure, including a first seat body portion 32 arranged horizontally and a second seat body portion 33 arranged vertically, which are fixedly connected to each other. Preferably, the two are manufactured in an integrated molding manner, wherein the first seat body portion 32 is detachably connected to the positioning limit plate 2 through the second fastener 52, and the second seat body portion 33 is detachably connected to the rigid clamping head member 42 through the third fastener 53. The second fastener 52 is preferably a countersunk screw, and the third fastener 53 is preferably a bolt. Through the cooperation of the third fastener 53 and the first fastener 51, the pull rod seat 72 and the rigid clamping head member 42 are double fixed, and finally it is ensured that in the process of the pull rod 71 driving the elastic claw member 41 to move up and down, the positioning limit plate 2, the seat body 3, the rigid clamping head member 42, the pull rod seat 72 and the rotating assembly 6 will not move up and down with the pull rod 71 and the elastic claw member 41.

[0027] The utility model described above only expresses the implementation method of the utility model embodiment, and cannot be understood as limiting the scope of the utility model patent, nor is it any form of limitation on the structure of the utility model embodiment. It should be pointed out that for ordinary technicians in this field, several changes and improvements can be made without departing from the concept of the utility model embodiment, which all belong to the protection scope of the utility model embodiment.

Claims

1. A radial automatic locking rotation mechanism, comprising a cylinder (9), a rotation assembly (6) arranged above the cylinder (9), a pull rod (71) arranged in the middle of the rotation assembly (6), the pull rod (71) being in contact with the bottom of a spring chuck (4) through a pull rod seat (72), and the spring chuck (4) being provided with a seat body (3) on its outer sleeve; characterized in that: The spring chuck (4) comprises a rigid chuck member (42) through which a pull rod (71) can pass, and an elastic claw member (41) sleeved on the upper end of the rigid chuck member (42), the upper end of the elastic claw member (41) is provided with a multi-petal deformable conical portion (411), the inner wall of the seat body (3) is provided with an abutment portion (31) that is locked with the conical portion (411), the lower part of the pull rod (71) is sleeved with a compression spring (711), and the upper end of the seat body (3) is connected with a positioning limit plate (2); The upper and lower ends of the rigid clamping head member (42) are respectively connected to the seat body (3) and the pull rod seat (72).

2. A radial automatic locking rotation mechanism according to claim 1, characterized in that: The rigid clamping member (42) includes a large diameter portion (421), a small diameter portion (422) and a middle diameter portion (423) which are coaxially arranged in sequence from top to bottom, and the pull rod seat (72) includes an inverted T-stage portion (721) which is concavely matched with the small diameter portion (422) and the middle diameter portion (423), and a first fastener (51) for fixing the pull rod seat (72) and the rigid clamping member (42) is provided at the lower end of the inverted T-stage portion (721).

3. A radial automatic locking rotation mechanism according to claim 2, characterized in that: The elastic claw member (41) also includes a cylindrical portion (412) in an annular shape fixedly arranged below the conical portion (411), and a bottom plate (413) fixedly arranged at the bottom end of the cylindrical portion (412). The abutment portion (31) includes an inclined inner wall (311) corresponding to the conical portion (411) and a vertical inner wall (312) corresponding to the cylindrical portion (412). The cylindrical portion (412) can move up and down along the inner wall of the large diameter portion (421). The top end of the pull rod (71) passes through the pull rod seat (72) and the rigid clamping head member (42) in sequence, thereby abutting against the bottom surface of the bottom plate (413).

4. A radial automatic locking rotation mechanism according to claim 3, characterized in that: The seat body (3) comprises a first seat body portion (32) arranged horizontally and a second seat body portion (33) arranged vertically, wherein the first seat body portion (32) is detachably connected to the positioning limit plate (2) via a second fastener (52), and the second seat body portion (33) is detachably connected to the rigid clamping member (42) via a third fastener (53).

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