High-rigidity large gear grinding clamp

Abstract

A high-rigidity large gear grinding clamp comprises a cylinder body, a hydraulic piston arranged in the left portion of the cylinder body and a pull rod connected with the hydraulic piston, the right end of the pull rod rightwards penetrates out of the cylinder body and is provided with a clamping structure, and the edge of a port of the right end of the cylinder body rightwards extends to form an expansion pipe; an expansion conical surface matched with the clamping structure is arranged on the outer wall of the right part of the expansion pipe, and the diameter of the expansion conical surface is gradually reduced from left to right; a backer attached to the cylinder body is arranged on the right end face of the cylinder body. The backer is annular, and the backer is sleeved outside the right end of the expansion tube; the backer is fixed with the cylinder body through a fixing structure; the outer edge of the right side wall of the backer extends rightwards to form an annular right supporting part. According to the high-rigidity gear grinding clamp for the large gear, the rigidity and the pressure bearing capacity of the backer can be effectively improved, so that the stability of the gear when the gear is clamped is effectively improved, the vibration amplitude of the gear in the gear grinding process is reduced, and the gear grinding efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of jigs, in particular to a high-rigidity large gear grinding jig. Background Art

[0002] A grinding jig is a fixing device used to fix a gear for machining. After the grinding jig clamps and fixes the gear, the outer peripheral surface of the gear can be ground into gear teeth by using a gear processing device. This processing method causes severe vibration when the gear is clamped by the grinding jig for machining. Therefore, a backrest capable of supporting the gear needs to be arranged on the jig. By improving the stability of the gear, the vibration amplitude of the gear during the grinding process can be reduced, which is beneficial to the development of the grinding work, thereby shortening the grinding time and improving the grinding efficiency. However, the length of the backrest on the traditional grinding jig is short, and the stiffness that can be formed is extremely limited, resulting in extremely limited shock absorption effect. If the length of the backrest is simply extended, the backrest itself will cause the force arm to become longer due to the length extension. Once it suffers from the vibration from the gear, it is more likely to break. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a high-rigidity large gear grinding jig, which can effectively improve the rigidity and bearing capacity of the backrest, thereby effectively improving the stability of the gear when it is clamped, reducing the vibration amplitude of the gear during the grinding process, and effectively improving the grinding efficiency.

[0004] The technical solution adopted by the utility model to solve the above technical problems is as follows:

[0005] The utility model discloses a high-rigidity large gear grinding jig, which includes a cylinder block, a hydraulic piston arranged in the left part of the cylinder block, and a pull rod connected to the hydraulic piston. The right end of the pull rod extends out of the cylinder block to the right and is provided with a clamping structure. An expansion pipe extends outwards from the edge of the right end port of the cylinder block; an expansion conical surface matching the clamping structure is arranged on the outer wall of the right part of the expansion pipe, and the diameter of the expansion conical surface gradually decreases from left to right; a backrest is arranged on the right end surface of the cylinder block and is attached thereto; the backrest is annular and sleeved on the right end of the expansion pipe; the backrest is fixed to the cylinder block through a fixing structure; a right support part in the shape of a ring extends outwards from the outer edge of the right side wall of the backrest; a lengthening sleeve sleeved on the cylinder block is arranged on the left side wall of the backrest; the lengthening sleeve, the backrest and the right support part are integrally formed; a support step in the shape of a ring is arranged in the left part of the cylinder block, and the left end of the lengthening sleeve abuts against the support step.

[0006] A left support part in the shape of a ring extends outwards from the left end port of the lengthening sleeve, and the left side wall of the left support part is attached to the support step; the left side wall of the left support part and the left end surface of the lengthening sleeve are connected by an auxiliary conical surface that is narrow on the left and wide on the right for transition.

[0007] A circular groove is provided on the right side wall of the backrest; the bottom of the groove is connected to the right side wall of the right support part through an outer conical surface that is narrow on the left and wide on the right; the bottom of the groove is connected to the right side wall of the backrest through an inner conical surface that is wide on the left and narrow on the right.

[0008] The fixing structure includes a number of screw holes evenly arranged in a circle on the right side wall of the cylinder block; a number of hidden grooves corresponding to the positions of the screw holes are provided on the right side wall of the backrest; a perforation communicating with the screw hole is provided at the center of the bottom of the hidden groove; a screw passes through the perforation to the left and is screwed into the screw hole, and the head of the screw presses on the bottom of the hidden groove, and the head of the screw is located in the hidden groove.

[0009] The clamping structure includes a traction head provided at the right end of the pull rod; a circular right limiting part is provided on the outer wall of the right end of the traction head; a circular left limiting part is provided on the outer wall of the left end of the traction head; the outer diameter of the left limiting part is smaller than the outer diameter of the right limiting part; a circular clamping groove is formed by enclosing the left limiting part, the right limiting part and the outer wall of the traction head; a rubber expansion sleeve is sleeved outside the expansion tube; a guiding conical surface matching the expansion conical surface is provided on the inner wall of the rubber expansion sleeve; a number of sliding blocks matching the clamping groove are provided on the inner wall of the right end port of the rubber expansion sleeve; a gear fittingly attached thereto is provided on the right side wall of the right support part; a shaft hole is provided at the center of the gear, and the rubber expansion sleeve is located in the shaft hole.

[0010] A pressing cover is provided on the right side of the gear, and the left end face of the pressing cover corresponds to the position of the right support part; the pressing cover is in the shape of a horn that is wide on the left and narrow on the right.

[0011] An annular buffer groove is provided on the inner wall of the extension sleeve.

[0012] The outer diameter of the extension sleeve is smaller than the outer diameter of the right support part; the outer wall of the extension sleeve is connected to the outer wall of the right support part through a traction conical surface that is narrow on the left and wide on the right.

[0013] The beneficial effects of the utility model are:

[0014] Compared with the prior art, when the high-rigidity large gear grinding fixture with the structure of the present utility model clamps the gear through the rubber expansion sleeve, the right support part can effectively support the gear. At this moment, the right support part has two support points at the same time. The fitting between the left side wall of the backrest and the right side wall of the cylinder block can form a support, and the fitting between the left side wall of the left support part of the left end of the extension sleeve and the support step can form another support. The existence of the two supports can effectively ensure the rigidity and pressure-bearing capacity of the right support part. Moreover, the right support part, the extension sleeve and the backrest are integrally formed, and the extension sleeve directly wraps the cylinder block inside and has a relatively long length. At the same time, the inner wall of the extension sleeve fits with the outer wall of the cylinder block, and the existence of the cylinder block is equivalent to thickening the wall thickness of the extension sleeve, making the extension sleeve have extremely high rigidity. Therefore, when the extension sleeve supports the backrest and the right support part, it can ensure the rigidity and pressure-bearing capacity of the right support part to the greatest extent, making the existence of the right support part effectively improve the stability when the gear is clamped. As the stability of the gear increases, the vibration amplitude of the gear during the grinding process can be effectively reduced, the processing difficulty caused by the vibration of the gear during the grinding process can be reduced, and the grinding efficiency can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a sectional view of the high-rigidity large gear grinding fixture of the present utility model;

[0016] Figure 2 is a schematic structural view of the high-rigidity large gear grinding fixture of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments:

[0018] Please refer to Figure 1 , Figure 2 , the present utility model provides a high-rigidity large gear grinding fixture, which includes a cylinder block 1, a hydraulic piston 2 arranged inside the left part of the cylinder block 1, and a pull rod 3 connected to the hydraulic piston 2. The right end of the pull rod 3 extends out of the cylinder block 1 to the right and is provided with a clamping structure. An expansion pipe 4 extends rightward from the edge of the right end port of the cylinder block 1; an expansion conical surface 5 matching the clamping structure is provided on the outer wall of the right part of the expansion pipe 4, and the diameter of the expansion conical surface 5 gradually decreases from left to right; a backrest 601 fitting with the right end surface of the cylinder block 1 is provided on the right end surface of the cylinder block 1; the backrest 601 is annular, and the backrest 601 is sleeved outside the right end of the expansion pipe 4; the backrest 601 is fixed to the cylinder block 1 through a fixing structure; a ring-shaped right support part 602 extends rightward from the outer edge of the right side wall of the backrest 601; a lengthening sleeve 603 sleeved outside the cylinder block 1 is provided on the left side wall of the backrest 601; the lengthening sleeve 603, the backrest 601 and the right support part 602 are integrally formed; a ring-shaped support step 7 is provided in the left part of the cylinder block 1, and the left end of the lengthening sleeve 603 abuts against the support step 7.

[0019] A left end port of the lengthening sleeve 603 extends leftward to form an annular left support portion 604, and a left side wall of the left support portion 604 is in contact with the support step 7; a transition connection is formed between a left side wall of the left support portion 604 and a left end face of the lengthening sleeve 603 through an auxiliary conical surface 605 that is narrow on the left and wide on the right.

[0020] A right side wall of the backrest 601 is provided with an annular groove 607; a transition connection is formed between a bottom of the groove 607 and a right side wall of the right support portion through an external conical surface 608 that is narrow on the left and wide on the right; a transition connection is formed between a bottom of the groove 607 and a right side wall of the backrest 601 through an internal conical surface 609 that is wide on the left and narrow on the right.

[0021] The fixing structure includes a plurality of screw holes 8 that are uniformly arranged in a circumferential manner on a right side wall of the cylinder block 1; the right side wall of the backrest 601 is provided with a plurality of hidden grooves 610 corresponding to the positions of the screw holes 8; a through hole 611 that communicates with the screw holes 8 is provided at a center of a bottom of the hidden groove 610; a screw 9 passes through the through hole 611 leftward and is screwed into the screw hole 8, a head of the screw 9 presses on a bottom of the hidden groove 610, and the head of the screw 9 is located in the hidden groove 610.

[0022] The clamping structure includes a traction head 10 provided at a right end of the pull rod 3; an annular right limiting portion 11 is provided on an outer wall of a right end of the traction head 10; an annular left limiting portion 12 is provided on an outer wall of a left end of the traction head 10; an outer diameter of the left limiting portion 12 is smaller than an outer diameter of the right limiting portion 11; an annular clamping groove 13 is formed by enclosing the outer walls of the left limiting portion 12, the right limiting portion 11, and the traction head 10; a rubber expansion sleeve 14 that matches the expansion tube 4 is sleeved outside the expansion tube 4; a guiding conical surface 15 that matches the expansion conical surface 5 is provided on an inner wall of the rubber expansion sleeve 14; a plurality of sliding clamping blocks 16 that match the clamping groove 13 are provided on an inner wall of a right end port of the rubber expansion sleeve 14; a gear 17 that fits with the right side wall of the right support portion 602 is provided on the right side wall of the right support portion 602; a shaft hole 18 is provided at a center of the gear 17, and the rubber expansion sleeve 14 is located in the shaft hole 18.

[0023] A pressing cover 19 is provided on a right side of the gear 17, and a left end face of the pressing cover 19 corresponds to the position of the right support portion 602; the pressing cover 19 is in a horn shape that is wide on the left and narrow on the right.

[0024] An annular buffer groove 612 is provided on an inner wall of the lengthening sleeve 603.

[0025] An outer diameter of the lengthening sleeve 603 is smaller than an outer diameter of the right support portion 602; a transition connection is formed between an outer wall of the lengthening sleeve 603 and an outer wall of the right support portion 602 through a traction conical surface 20 that is narrow on the left and wide on the right.

[0026] The usage method of the present utility model is as follows:

[0027] When the fixture is in use, the movement of the hydraulic piston 2 can be controlled by the flow of hydraulic oil in the oil circuit of the cylinder block 1, so that the clamping and loosening of the fixture can be achieved through the movement of the hydraulic piston 2. When it is necessary to clamp the gear 17, the gear 17 can be sleeved outside the rubber expansion sleeve 14 through the shaft hole 18 first, and then the leftward movement of the hydraulic piston 2 can be controlled. When the hydraulic piston 2 moves leftward, the hydraulic piston 2 will pull the towing head 10 leftward through the pull rod 3. When the towing head 10 moves leftward, the guiding conical surface 15 in the rubber expansion sleeve 14 will synchronously move leftward along the track of the expansion conical surface 5, and the diameter of the expansion conical surface 5 gradually increases from right to left. As the rubber expansion sleeve 14 moves leftward, the rubber expansion sleeve 14 will expand outward under the extrusion of the expansion conical surface 5, so that the outer wall of the rubber expansion sleeve 14 is tightly pressed in the shaft hole 18 of the gear 17, realizing the clamping and fixing of the gear 17. And a plurality of sliding blocks 16 in the right end port of the rubber expansion sleeve 14 can stably slide along the track of the clamping groove 13, thus ensuring the stability of the rubber expansion sleeve 14 during expansion.

[0028] When the gear 17 is clamped by the rubber expansion sleeve 14, the right side wall of the right support part 602 is in contact with the left side wall of the gear 17. At this moment, the right support part 602 has two support points at the same time. The contact between the left side wall of the backing 601 and the right side wall of the cylinder block 1 can form a support, and the contact between the left side wall of the left support part 604 at the left end of the extension sleeve 603 and the support step 7 can form another support. The existence of the two supports can effectively ensure the pressure-bearing capacity of the right support part 602. And the right support part 602, the extension sleeve 603 and the backing 601 are integrally formed. The extension sleeve 603 directly wraps the cylinder block 1 and has a relatively long length. At the same time, the inner wall of the extension sleeve 603 is in contact with the outer wall of the cylinder block 1. The existence of the cylinder block 1 is equivalent to thickening the wall thickness of the extension sleeve 603, making the extension sleeve 603 have extremely high rigidity. Therefore, when the extension sleeve 603 supports the backing 601 and the right support part 602, it can ensure the rigidity and pressure-bearing capacity of the right support part 602 to the greatest extent, so that the existence of the right support part 602 can effectively improve the stability when the gear 17 is clamped. As the stability of the gear 17 is improved, the vibration amplitude of the gear 17 during the gear grinding process can be effectively reduced, the processing difficulty caused by the vibration of the gear 17 during the gear grinding process can be reduced, and the gear grinding efficiency can be effectively improved.

[0029] A ring-shaped left support portion 604 is extended to the left from the left end port of the extension sleeve 603, and the left side wall of the left support portion 604 is in contact with the support step 7. The left side wall of the left support portion 604 and the left end face of the extension sleeve 603 are transitionally connected via an auxiliary conical surface 605 which is narrow on the left and wide on the right. The existence of the left support portion 604 can effectively gather the force of the support step 7 when supporting at the center of the extension sleeve 603, so that the supporting force of the extension sleeve 603 can be evenly radiated to the backrest 601 and the right support portion 602, further improving the stability of the right support portion 602 when supporting the gear 17.

[0030] An annular groove 607 is provided on the right side wall of the backrest 601, and the bottom of the groove 607 and the right side wall of the right support part 602 are transitionally connected by an outer conical surface 608 which is narrow on the left and wide on the right, and the bottom of the groove 607 and the right side wall of the backrest 601 are transitionally connected by an inner conical surface 609 which is wide on the left and narrow on the right. The existence of the inner conical surface 609, the outer conical surface 608 and the groove 607 enables the right support part 602 to deform to a certain extent when under pressure, and to automatically recover after deformation, thereby achieving the effect of buffering pressure, thereby effectively avoiding the situation where the right support part 602 is easily deformed when subjected to the high pressure generated by the vibration of the gear, and at the same time being able to effectively buffer the vibration force.

[0031] The fixing structure includes a plurality of screw holes 8 evenly arranged in a circle on the right side wall of the cylinder body 1, a plurality of hidden grooves 610 corresponding to the positions of the screw holes 8 are arranged on the right side wall of the backrest 601, a through hole 611 which is connected with the screw hole 8 is arranged at the center of the bottom of the hidden groove 610, a screw 9 passes through the through hole 611 to the left and is screwed into the screw hole 8, the head of the screw 9 is pressed on the bottom of the hidden groove 610, and the head of the screw 9 is located in the hidden groove 610. This fixing structure can ensure the stability between the backrest 601 and the cylinder body 1, and is conducive to the disassembly and assembly of the backrest 601. At the same time, as the head of the screw 9 is hidden in the hidden groove 610, it can effectively avoid the situation where the head of the screw 9 protrudes out of the backrest 601 and affects the left movement of the rubber expansion sleeve 14, thereby ensuring that the rubber expansion sleeve 14 can move to the left enough to clamp the gear 17 with the maximum clamping force, thereby ensuring the stability of the gear 17 when being clamped to the greatest extent.

[0032] There is a clamping cover 19 on the right side of the gear 17, and the left end surface of the clamping cover 19 corresponds to the position of the right support part 602. The existence of the clamping cover 19 can form a support on the right side of the gear 17, so that this support can echo the support of the right support part 602, thereby further improving the stability of the gear 17 when it is clamped. The clamping cover 19 has an assembly hole, which can be connected to a robotic arm or other mobile device through the assembly hole, so that the rubber expansion sleeve 14 clamps the gear 17 and presses the clamping cover 19 against the right side wall of the gear 17. The clamping cover 19 is in the shape of a trumpet that is wide on the left and narrow on the right, which not only allows the clamping cover 19 to have enough space to accommodate the structure of the right part of the clamp, but also prevents the clamping cover 19 from being too large.

[0033] An annular buffer groove 612 is provided on the inner wall of the extension sleeve 603. The existence of the buffer groove 612 can make the extension sleeve 603 have a certain deformation ability, so that the extension sleeve 603 can generate elasticity under pressure, and can effectively buffer the pressure applied to the backrest 601 and the right support part 602, thereby ensuring the rigidity and pressure-bearing capacity of the backrest 601 to the greatest extent.

[0034] The outer diameter of the extension sleeve 603 is smaller than the outer diameter of the right support part 602. The outer wall of the extension sleeve 603 and the outer wall of the right support part 602 are transitionally connected by a traction cone 20 that is narrow on the left and wide on the right. If the right support part 602 is under pressure when supporting the gear 17, the pressure will not be vertically transmitted to the extension sleeve 603 through the right support part 602, thereby avoiding that all the pressure is concentrated on the support step 7. Under the traction of the traction cone 20, the pressure on the right support part 602 will be transmitted to the extension sleeve 603 in an inclined trajectory, so that the pressure is evenly dispersed to the left support part 604, the inner wall of the extension sleeve 603 and the backrest 601, so that the support step 7, the outer wall of the cylinder body 1 and the right end face of the cylinder body 1 are under pressure at the same time, so that the pressure bearing becomes simple, and the rigidity and pressure bearing capacity of the extension sleeve 603, the backrest 601 and the right support part 602 are further improved.

[0035] The outer diameter of the left limit portion 12 is smaller than that of the right limit portion 11 . The left limit portion 12 , the right limit portion 11 and the outer wall of the traction head 10 together form an annular slot 13 . This structural design facilitates the sliding block 16 to be stuck in the slot 13 or removed from the slot 13 .

Claims

1. A high-rigidity large gear grinding fixture, comprising a cylinder body, a hydraulic piston arranged in the left part of the cylinder body, and a pull rod connected to the hydraulic piston, the right end of the pull rod passes rightward out of the cylinder body and is provided with a clamping structure, characterized in that: An expansion tube extends to the right from the edge of the port at the right end of the cylinder body; an expansion cone matching the clamping structure is provided on the outer wall of the right part of the expansion tube, and the diameter of the expansion cone gradually decreases from left to right; a backrest fitting therewith is provided on the right end face of the cylinder body; the backrest is annular and is sleeved on the outside of the right end of the expansion tube; the backrest is fixed to the cylinder body by a fixing structure; an annular right support portion extends to the right from the outer edge of the right side wall of the backrest; an extension sleeve is provided on the left side wall of the backrest outside the cylinder body; the extension sleeve, the backrest and the right support portion are integrally formed; an annular support step is provided on the left part of the cylinder body, and the left end of the extension sleeve presses against the support step.

2. The high-rigidity large gear grinding fixture according to claim 1 is characterized in that: The left end port of the extension sleeve extends leftward to form an annular left support portion, and the left side wall of the left support portion fits the support step; the left side wall of the left support portion and the left end face of the extension sleeve are transitionally connected by an auxiliary conical surface that is narrow on the left and wide on the right.

3. The high-rigidity large gear grinding fixture according to claim 1 is characterized in that: The right side wall of the backrest is provided with an annular groove; the bottom of the groove and the right side wall of the right support part are transitionally connected by an outer cone surface that is narrow on the left and wide on the right; the bottom of the groove and the right side wall of the backrest are transitionally connected by an inner cone surface that is wide on the left and narrow on the right.

4. The high-rigidity large gear grinding fixture according to claim 1 is characterized in that: The fixing structure includes a plurality of screw holes evenly arranged in a circle on the right side wall of the cylinder body; the right side wall of the backrest is provided with a plurality of hidden grooves corresponding to the positions of the screw holes; a through hole communicating with the screw hole is provided at the center of the bottom of the hidden groove; a screw passes through the through hole to the left and is screwed into the screw hole, the head of the screw is pressed against the bottom of the hidden groove, and the head of the screw is located in the hidden groove.

5. The high-rigidity large gear grinding fixture according to claim 1 is characterized in that: The clamping structure includes a traction head arranged at the right end of the pull rod; a right limiting portion in the shape of an annular shape is provided on the outer wall of the right end of the traction head; a left limiting portion in the shape of an annular shape is provided on the outer wall of the left end of the traction head; the outer diameter of the left limiting portion is smaller than the outer diameter of the right limiting portion; the left limiting portion, the right limiting portion and the outer wall of the traction head are combined to form an annular groove; a rubber expansion sleeve matching the expansion tube sleeve is provided on the outer sleeve; a guide cone matching the expansion cone is provided on the inner wall of the rubber expansion sleeve; a plurality of sliding blocks matching the groove are provided on the inner wall of the right end port of the rubber expansion sleeve; a gear matching the right side wall of the right support portion is provided; an axial hole is provided in the center of the gear, and the rubber expansion sleeve is located in the axial hole.

6. The high-rigidity large gear grinding fixture according to claim 5, characterized in that: A pressing cover is provided on the right side of the gear, and the left end surface of the pressing cover corresponds to the position of the right supporting part; the pressing cover is in a trumpet shape that is wider on the left and narrower on the right.

7. The high-rigidity large gear grinding fixture according to claim 1, characterized in that: The inner wall of the extension sleeve is provided with an annular buffer groove.

8. The high-rigidity large gear grinding fixture according to claim 1, characterized in that: The outer diameter of the extension sleeve is smaller than the outer diameter of the right support portion; the outer wall of the extension sleeve and the outer wall of the right support portion are transitionally connected via a traction cone surface that is narrow on the left and wide on the right.

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