Long shaft hobbing tool

Abstract

The utility model discloses a long shaft hobbing tool which comprises a front base and a rear base which are in threaded connection, a front connecting disc is arranged in the front base, a rear connecting disc detachably connected with the front connecting disc is arranged on one side in the rear base, and an expansion sleeve detachably connected with the rear connecting disc is arranged on the other side in the rear base. A transition inclined face is arranged on the outer side wall of the non-connecting end of the expansion sleeve. The front connecting disc connected with the power device and in threaded connection with the rear connecting disc is arranged, the expansion sleeve is connected to the rear connecting disc, a workpiece is placed in the expansion sleeve and abuts against the tip, and rapid positioning of the clamping center is achieved; when the expansion sleeve is driven to move, the diameter of the expansion sleeve becomes smaller under the extrusion action of the rear base, most of the length positions make contact with and clamp a workpiece, the stress rigidity is sufficient, vibration marks are not prone to being generated during machining, and the machining precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gear processing, in particular to a long-axis gear hobbing tool. Background Art

[0002] When long-shaft gears are hobbed, the contact length at the clamping position is short, resulting in insufficient force rigidity at the far end of the non-clamping position. As the hobbing position vibrates during processing, vibration marks are easily generated on the tooth wall, resulting in the inability to guarantee the tooth groove accuracy of the hobbed product, greatly affecting production efficiency. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a long shaft gear hobbing tool that can both quickly clamp and ensure machining accuracy.

[0004] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a long-axis gear hobbing tool, comprising a front base and a rear base screwed together, a front connecting disk is arranged in the front base, a rear connecting disk detachably connected to the front connecting disk is arranged on one side of the rear base, and an expansion sleeve detachably connected to the rear connecting disk is arranged on the other side, and a transition slope is arranged on the outer side wall of the non-connecting end of the expansion sleeve; when in use, a workpiece is placed in the expansion sleeve, the front connecting disk is hydraulically pulled, the rear connecting disk and the expansion sleeve are driven to move simultaneously, and the transition slope is squeezed by the rear base so that the expansion sleeve clamps the workpiece.

[0005] The above structure is adopted, a front base and a rear base are provided which are screwed together, and a power device is used to drive the front base and the rear base to move simultaneously, and synchronously drive the expansion sleeve to move. During the movement of the expansion sleeve, the rear base squeezes the transition slope and makes the diameter of the expansion sleeve smaller to clamp the workpiece. Since the expansion sleeve is placed in the rear base, the workpiece is wrapped and clamped by utilizing the length of the expansion sleeve, thereby increasing the contact area, and the distance between the processing position and the clamping position is reduced, so that the force rigidity is sufficient, that is, the vibration generated by the force is small, vibration marks are not easily generated during processing, and the processing accuracy is improved.

[0006] In order to simplify the structure and facilitate installation, preferably, a clearance hole is provided on one side of the rear base, and a placement hole connected to the clearance hole is provided on the other side, a rear connecting plate is provided in the clearance hole, an expansion sleeve is inserted in the placement hole, and a connecting tube is connected to the insertion end of the expansion sleeve. The connecting tube extends into the clearance hole through the connection between the clearance hole and the placement hole, and is screwed to the center hole of the rear connecting plate.

[0007] In order to facilitate the positioning of the clamping center of the workpiece, preferably, a step hole is provided on the front base, a front connecting plate is provided in the large hole end of the step hole, a top point is inserted in the small hole end of the step hole, and the non-insertion end of the top point extends into the connecting tube.

[0008] In order to improve the connection strength between the front connecting plate and the rear connecting plate, preferably, a through hole is provided on the step surface of the step hole, a guide sleeve is provided in the through hole, a connecting bolt is passed through the front connecting plate, the protruding end of the connecting bolt extends into the clearance hole through the guide sleeve, the extending end of the connecting bolt is threadedly connected to the rear connecting plate, and the inner end face of the front connecting plate abuts against the outer end face of the guide sleeve.

[0009] In order to avoid installation interference and reduce installation clearance, thereby improving processing efficiency, it is preferred that a groove is provided on the end face of the front base corresponding to the side of the rear base, and a locking bolt is passed through the position corresponding to the groove on the front base, one side of the rear base extends into the groove, and the protruding end of the locking bolt is abutted and fixed to the outer wall of the rear base.

[0010] In order to ensure the variation range of the expansion sleeve diameter and the smoothness of the shrinkage and clamping of the workpiece, preferably, four open grooves are arranged along the circumferential direction at positions corresponding to the transition slopes on the expansion sleeve.

[0011] In order to ensure the safety and accuracy of gear hobbing, preferably, a limit groove is provided on one side of the expansion sleeve, and a limit rod is inserted at a position corresponding to the limit groove on the rear base, and the insertion end of the limit rod extends into the limit groove.

[0012] In order to avoid scratching and wearing the expansion sleeve and ensure the service life of the expansion sleeve, preferably, a yielding slope is provided on the hole wall of the placement hole at a position corresponding to the transition slope. When in use, the yielding slope is in contact with the transition slope.

[0013] Beneficial effects: The utility model is provided with a front connecting plate which is connected to a power device and is screwed to a rear connecting plate, an expansion sleeve is connected to the rear connecting plate, the workpiece is placed in the expansion sleeve and abuts against the top, so as to realize rapid positioning of the clamping center; when the expansion sleeve is driven to move, the caliber becomes smaller due to the squeezing effect of the rear base and most of the length position contacts and clamps the workpiece, the force rigidity is sufficient, vibration marks are not easily produced during processing, and the processing accuracy is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0015] Figure 1 This is a schematic diagram of the new plugging structure of the utility model.

[0016] Figure 2 It is a structural diagram of the expansion sleeve.

[0017] Figure 3 for Figure 2Right view of .

[0018] The meanings of the symbols in the accompanying drawings are:

[0019] Front base-1; front connecting plate-10; step hole-11; guide sleeve-111; connecting bolt-112; top-12; locking bolt-13;

[0020] Rear base-2; rear connecting plate-20; clearance hole-21; placement hole-22; limit rod-23; clearance slope-24;

[0021] Expansion sleeve-3; transition slope-30; connecting tube-31; opening groove-32; limiting groove-33. DETAILED DESCRIPTION

[0022] Depend on Figure 1 , Figure 2 and Figure 3 As shown, the utility model comprises a front base 1 and a rear base 2 which are screwed together, a front connecting plate 10 is arranged in the front base 1, a rear connecting plate 20 which is detachably connected to the front connecting plate 10 is arranged on one side of the rear base 2, and an expansion sleeve 3 which is detachably connected to the rear connecting plate 20 is arranged on the other side, and a transition slope 30 is arranged on the outer side wall of the non-connecting end of the expansion sleeve 3; when in use, a workpiece ( Figure 1 The front connecting plate 10 is hydraulically pulled to drive the rear connecting plate 20 and the expansion sleeve 3 to move simultaneously, and the transition slope 30 is squeezed by the rear base 2 so that the expansion sleeve 3 can clamp the workpiece.

[0023] Specifically, a clearance hole 21 is provided on one side of the rear base 2, and a placement hole 22 connected to the clearance hole 21 is provided on the other side. A rear connecting plate 20 is provided in the clearance hole 21, and an expansion sleeve 3 is inserted in the placement hole 22. The insertion end of the expansion sleeve 3 is connected to a connecting tube 31. The connecting tube 31 extends into the clearance hole 21 through the connection between the clearance hole 21 and the placement hole 22, and is screwed to the center hole of the rear connecting plate 20.

[0024] A step hole 11 is provided on the front base 1, and a front connecting plate 10 is provided in the large hole end of the step hole 11, and a top point 12 is inserted in the small hole end of the step hole 11, and the non-plug-in end of the top point 12 extends into the connecting tube 31; a through hole is provided on the step surface of the step hole 11, and a guide sleeve 111 is sleeved in the through hole, and a connecting bolt 112 is passed through the front connecting plate 10, and the protruding end of the connecting bolt 112 extends into the clearance hole 21 through the guide sleeve 111, and the protruding end of the connecting bolt 112 is threadedly connected to the rear connecting plate 20, and the inner end surface of the front connecting plate 10 abuts against the outer end surface of the guide sleeve 111.

[0025] A groove is provided on the end surface of the front base 1 corresponding to one side of the rear base 2, and a locking bolt 13 is passed through the position corresponding to the groove on the front base 1. One side of the rear base 2 extends into the groove, and the protruding end of the locking bolt 13 is abutted and fixed to the outer wall of the rear base 2.

[0026] Four opening grooves 32 are arranged along the circumferential direction at positions corresponding to the transition inclined surfaces 30 on the expansion sleeve 3; a limiting groove 33 is arranged on one side of the expansion sleeve 3, and a limiting rod 23 is inserted at a position corresponding to the limiting groove 33 on the rear base 2, and the insertion end of the limiting rod 23 extends into the limiting groove 33.

[0027] A section of a relief slope 24 is provided on the hole wall of the placement hole 22 at a position corresponding to the transition slope 30 . When in use, the relief slope 24 is in close contact with the transition slope 30 .

[0028] The operating principle of the utility model is as follows:

[0029] Depend on Figures 1 to 3 As shown, before use, an expansion sleeve 3 is inserted into the placement hole 22, and the insertion end of the expansion sleeve 3 is connected to a connecting tube 31. The connecting tube 31 extends into the makeshift hole 21 through the connection between the makeshift hole 21 and the placement hole 22, and is screwed to the center hole of the rear connecting plate 20. Then, the top point 12 is inserted into the small hole end of the step hole 11, and the non-plug end of the top point 12 extends into the connecting tube 31.

[0030] Then, a connecting bolt 112 is passed through the front connecting plate 10 , and the protruding end of the connecting bolt 112 extends into the clearance hole 21 through the guide sleeve 111 . The inserted end of the connecting bolt 112 is threadedly connected to the rear connecting plate 20 , and the inner end face of the front connecting plate 10 abuts against the outer end face of the guide sleeve 111 .

[0031] Finally, the locking bolt 13 is used to abut and fix the outer wall of the rear base 2, and then the front base 1 and the rear base 2 are screwed together, and the limiting rod 23 is inserted and the insertion end of the limiting rod 23 is extended into the limiting groove 33, and the front base 1 is fixed on the processing equipment.

[0032] When in use, one side of the workpiece is placed in the expansion sleeve 3, and the center hole of the workpiece insertion end is inserted into and abutted with the center pin 12. The output end of the power equipment (such as a hydraulic press, a cylinder, not shown) is used to drive the front base 1 and the rear base 2 to move simultaneously, and synchronously drive the expansion sleeve 3 to move. During the movement of the expansion sleeve 3, the positioning inclined surface 24 is fitted and abutted with the transition inclined surface 30, and the gap of the opening groove 32 is reduced, that is, the diameter of the expansion sleeve 3 becomes smaller, so as to clamp the workpiece; at this time, since one end of the workpiece already has the center position of the center pin 12 supporting the shaft, on the premise of ensuring the concentricity requirements of the installation, the center error between the clamped workpiece and the center pin 12 can also be guaranteed to be within the accuracy requirements.

[0033] In addition, since the expansion sleeve 3 is placed in the rear base 2, the length of the expansion sleeve 3 is used to wrap and clamp the workpiece, which increases the contact area, and the distance between the processing position and the clamping position is reduced. The force rigidity is sufficient, that is, the vibration generated by the force is small, and vibration marks are not easily generated during processing, thereby improving the processing accuracy.

Claims

1. A long shaft gear hobbing tool, characterized in that: The invention comprises a front base (1) and a rear base (2) which are screw-connected, wherein a front connecting plate (10) is arranged in the front base (1), a rear connecting plate (20) which is detachably connected to the front connecting plate (10) is arranged on one side of the rear base (2), and an expansion sleeve (3) which is detachably connected to the rear connecting plate (20) is arranged on the other side, and a transition slope (30) is arranged on the outer side wall of the non-connecting end of the expansion sleeve (3); when in use, a workpiece is placed in the expansion sleeve (3), and the front connecting plate (10) is hydraulically pulled to drive the rear connecting plate (20) and the expansion sleeve (3) to move simultaneously, and the transition slope (30) is squeezed by the rear base (2) so that the expansion sleeve (3) can clamp the workpiece.

2. A long shaft gear hobbing tool as claimed in claim 1, characterized in that: A clearance hole (21) is provided on one side of the rear base (2), and a placement hole (22) connected to the clearance hole (21) is provided on the other side. A rear connection plate (20) is provided in the clearance hole (21), and an expansion sleeve (3) is inserted in the placement hole (22). A connecting tube (31) is provided at the insertion end of the expansion sleeve (3). The connecting tube (31) extends into the clearance hole (21) through the connection between the clearance hole (21) and the placement hole (22), and is screwed to the center hole of the rear connection plate (20).

3. A long shaft gear hobbing tool as claimed in claim 2, characterized in that: A stepped hole (11) is provided on the front base (1), a front connecting plate (10) is provided in the large hole end of the stepped hole (11), a top tip (12) is inserted in the small hole end of the stepped hole (11), and a non-inserted end of the top tip (12) extends into a connecting tube (31).

4. A long shaft gear hobbing tool as claimed in claim 3, characterized in that: A through hole is provided on the step surface of the step hole (11), a guide sleeve (111) is sleeved in the through hole, a connecting bolt (112) is penetrated on the front connecting plate (10), the protruding end of the connecting bolt (112) extends into the clearance hole (21) through the guide sleeve (111), the protruding end of the connecting bolt (112) is threadedly connected to the rear connecting plate (20), and the inner end surface of the front connecting plate (10) is in contact with the outer end surface of the guide sleeve (111).

5. A long shaft gear hobbing tool as claimed in claim 3, characterized in that: A groove is provided on the end surface of the front base (1) on one side corresponding to the rear base (2), and a locking bolt (13) is passed through the position of the front base (1) corresponding to the groove, one side of the rear base (2) extends into the groove, and the protruding end of the locking bolt (13) is abutted and fixed against the outer wall of the rear base (2).

6. A long shaft gear hobbing tool as claimed in claim 1, characterized in that: Four opening grooves (32) are arranged along the circumferential direction at positions on the expansion sleeve (3) corresponding to the transition inclined surface (30).

7. A long shaft gear hobbing tool as claimed in claim 6, characterized in that: A limiting groove (33) is provided on one side of the expansion sleeve (3), and a limiting rod (23) is inserted at a position corresponding to the limiting groove (33) on the rear base (2), and an insertion end of the limiting rod (23) extends into the limiting groove (33).

8. A long shaft gear hobbing tool as claimed in claim 2, characterized in that: A section of a giving way inclined surface (24) is provided on the hole wall of the placement hole (22) at a position corresponding to the transition inclined surface (30); when in use, the giving way inclined surface (24) is in close contact with the transition inclined surface (30).

Images