Gear grinding clamp for small-diameter mesopore gear

Abstract

The utility model discloses a small-diameter mesopore gear grinding clamp which comprises a base fixedly arranged on a grinding machine, a connecting base arranged on the base in a threaded connection mode, a conical rod detachably arranged on the connecting base and a pull rod assembly movably arranged on the base and penetrating out of the connecting base. The penetrating-out end of the pull rod assembly extends into a mounting hole in the middle of the supporting base, and the extending-in end of the pull rod assembly is provided with an expansion sleeve arranged on the outer side of the conical rod in a sleeving mode. The pull rod assembly is arranged to drive the expansion sleeve to move on the outer side wall of the fixedly-arranged conical rod, the expansion sleeve expands along with the appearance of the conical rod, the center hole of the gear is expanded, so that the gear is expanded and fixed, the conical rod can be prevented from being damaged, and the stability of the clamping centrality of gear grinding machining can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of gear processing, in particular to a gear grinding fixture for a small-diameter medium-hole gear. Background Art

[0002] For gears with smaller center holes, the center hole of the gear is usually directly supported by the taper of the tapered rod during the gear grinding process. Due to the direct rigid contact, the force strength of the tapered rod is relatively large. In addition, the diameter of the tapered rod is small, which can easily cause the tapered rod to break, resulting in failure of the gear to be fixed tightly, directly affecting production efficiency and maintenance costs. 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 small-diameter medium-hole gear grinding fixture which is convenient for clamping gears and ensures the stability of gear grinding processing.

[0004] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a small-diameter medium-hole gear grinding fixture, including a base fixed on the grinding machine, a connecting seat screwed on the base, a tapered rod detachably arranged on the connecting seat, and a pull rod assembly movably arranged on the base and passing through the connecting seat, the passing end of the pull rod assembly extends into the mounting hole in the middle of the support seat, and the extending end of the pull rod assembly is provided with an expansion sleeve sleeved on the outside of the tapered rod.

[0005] By adopting the above structure, a tapered rod is detachably arranged on the connecting seat, which is convenient for removing and replacing the tapered rod so as to be applicable to the processing of gear grinding of various specifications. The movably arranged pull rod assembly is convenient for driving the expansion sleeve to move, and is sleeved on the outer wall of the tapered rod to expand with the shape of the tapered rod, and the outer wall of the expansion sleeve fits the hole wall of the center hole to tighten the center hole of the gear, that is, tighten and fix the gear. On the basis of ensuring stable clamping, the accuracy of gear grinding processing is ensured, rigid contact between the tapered rod and the gear is avoided, and the breakage rate of the tapered rod is greatly reduced.

[0006] In order to simplify the structure and facilitate installation, preferably, a connecting block is provided on one side of the cone rod, the supporting seat is sleeved on the outside of the connecting block through the mounting hole, and the connecting block is screwed and fixed to the connecting seat.

[0007] In order to avoid movement interference and simplify the installation structure, as a preference, the pull rod assembly includes a hydraulic press arranged on the grinder, a connecting frame arranged in a makeshift hole in the middle of the base and connected to the output end of the hydraulic press, and a connecting rod threadedly connected to the connecting frame. A connecting plate is provided at the non-threaded end of the connecting rod, and a pull rod is passed through the connecting plate. The protruding end of the pull rod is then passed through a connecting seat and a connecting block in sequence, and one end of the pull rod protruding from the connecting block extends into the mounting hole. A clamping block is connected to the protruding end of the pull rod, and the outer wall of the clamping block is fitted with the hole wall of the mounting hole, and a expansion sleeve is clamped on the clamping block.

[0008] In order to simplify the structure and facilitate disassembly and assembly, preferably, a through hole is provided on the connecting seat, a guide sleeve is passed through the through hole, the protruding end of the guide sleeve is passed through the connecting block and abuts against the end face of the corresponding end of the clamping block; guide sleeves are passed through both ends of the pull rod, the protruding end of one end of the pull rod is provided with a limit block abutting against the connecting plate, and the protruding end of the other end of the pull rod is threadedly connected to the clamping block.

[0009] In order to simplify the structure and facilitate the disassembly and assembly of the expansion sleeve, preferably, a connecting hole is provided in the middle of the clamping block, and an annular boss is provided on the hole wall of the connecting hole along the circumferential direction; an annular groove is provided on the outer wall of the expansion sleeve at a position corresponding to the annular boss, and the annular boss is clamped in the annular groove so that the expansion sleeve is connected and fixed on the clamping block.

[0010] In order to prevent grinding waste from entering the clamping position between the annular boss and the annular groove and causing wear during use, preferably, a groove is provided along the circumferential direction on the hole wall of the connecting hole corresponding to the upper position of the annular boss, and a sealing ring is provided in the groove, and the inner wall of the sealing ring abuts against the corresponding position of the outer wall of the expansion sleeve.

[0011] In order to simplify the structure and buffer the kinetic energy of the transmission to avoid damage to the tapered rod due to force, preferably, a support plate is provided in the clearance hole, and the output end of the hydraulic press is provided with a support rod passing through the support plate and connected to a connecting frame; the non-threaded end of the connecting frame is connected to one end of a tension spring, and the other end of the tension spring is connected to the inner wall of the support plate.

[0012] In order to facilitate the discharge of air in the inner hole and avoid the expansion sleeve from moving out of place and affecting the clamping of the gear, preferably, a first exhaust hole connected to the mounting hole is provided on the outer wall of the support seat; and a second exhaust hole connected to the clearance hole is provided on the outer wall of the connecting seat.

[0013] Beneficial effect: The utility model arranges a pull rod assembly to drive the expansion sleeve to move on the outer wall of the fixed tapered rod, and utilizes the expansion sleeve to expand with the shape of the tapered rod to tighten the center hole of the gear so as to tighten and fix the gear, which can not only prevent damage to the tapered rod, but also ensure the stability of the clamping center degree of the gear grinding process. 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 It is a structural schematic diagram of the utility model.

[0016] The meanings of the symbols in the accompanying drawings are:

[0017] Base-1; connecting seat-10; support plate-11; clearance hole-12; second exhaust hole-13;

[0018] Cone rod-2; connecting block-21; guide sleeve-22; expansion sleeve-3; annular groove-31; sealing ring-32;

[0019] Hydraulic press-4; connecting plate-40; connecting frame-41; connecting rod-42; pull rod-43; limit block-431; clamping block-44; annular boss-441; support rod-45;

[0020] Support seat-5; mounting hole-50; first exhaust hole-51; tension spring-6. DETAILED DESCRIPTION

[0021] Depend on Figure 1 As shown, it includes a base 1 fixed on the grinding machine, a connecting seat 10 screwed on the base 1, a conical rod 2 detachably arranged on the connecting seat 10, and a pull rod assembly movably arranged on the base 1 and passing through the connecting seat 10, the passing end of the pull rod assembly extends into the mounting hole 50 in the middle of the support seat 5, and the extending end of the pull rod assembly is provided with a expansion sleeve 3 sleeved on the outside of the conical rod 2.

[0022] Specifically, a connection block 21 is provided on one side of the cone rod 2 , the support seat 5 is sleeved on the outer side of the connection block 21 through a mounting hole 50 , and the connection block 21 is screwed and fixed to the connection seat 10 .

[0023] The pull rod assembly includes a hydraulic press 4 arranged on the grinding machine, a connecting frame 41 arranged in a clearance hole 12 in the middle of the base 1 and connected to the output end of the hydraulic press 4, and a connecting rod 42 screwed to the connecting frame 41. A connecting plate 40 is provided at the non-screwed end of the connecting rod 42, and a pull rod 43 is passed through the connecting plate 40. The protruding end of the pull rod 43 is then passed through the connecting seat 10 and the connecting block 21 in sequence. One end of the pull rod 43 that passes through the connecting block 21 extends into the mounting hole 50. The protruding end of the pull rod 43 is connected with a clamping block 44. The outer wall of the clamping block 44 is arranged to fit the hole wall of the mounting hole 50, and an expansion sleeve 3 is clamped on the clamping block 44.

[0024] The connecting block 21 is passed through the protruding end of the guide sleeve 22 and abuts against the end face of the corresponding end of the clamping block 44; the guide sleeve 22 is passed through both ends of the pull rod 43, and the protruding end of one end of the pull rod 43 is provided with a limit block 431 abutting against the connecting plate 40, and the protruding end of the other end of the pull rod 43 is screwed and connected with the clamping block 44; a connecting hole is provided in the middle of the clamping block 44, and an annular boss 441 is provided around the hole wall of the connecting hole in a circumferential direction, and an annular groove 31 is provided on the outer wall of the expansion sleeve 3 at a position corresponding to the annular boss 441, and the annular boss 441 is clamped in the annular groove 31, so that the expansion sleeve 3 is connected and fixed on the clamping block 44.

[0025] A groove is provided on the wall of the connecting hole corresponding to the position above the annular boss 441 along the circumferential direction, and a sealing ring 32 is provided in the groove. The inner wall of the sealing ring 32 abuts against the corresponding position of the outer wall of the expansion sleeve 3.

[0026] A support plate 11 is also provided in the clearance hole 12, and a support rod 45 is provided at the output end of the hydraulic press 4, which passes through the support plate 11 and is connected to the connecting frame 41; the non-screwed end of the connecting frame 41 is connected to one end of the tension spring 6, and the other end of the tension spring 6 is connected to the inner wall of the support plate 11.

[0027] A first exhaust hole 51 communicating with the mounting hole 50 is provided on the outer side wall of the support seat 5 ; a second exhaust hole 13 communicating with the clearance hole 12 is provided on the outer side wall of the connecting seat 10 .

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

[0029] like Figure 1 As shown, the sealing ring 32 is first embedded in the groove on the clamping block 44, and then the annular boss 441 is clamped in the annular groove 31 so that the expansion sleeve 3 is connected and fixed on the clamping block 44. At this time, the inner wall of the sealing ring 32 abuts against the corresponding position of the outer wall of the expansion sleeve 3.

[0030] Next, a support rod 45 passing through the support plate 11 is arranged in the clearance hole 12, and the protruding end of the support rod 45 is fixedly connected to the connecting frame 41, and firstly, according to the specifications of the gear, the corresponding tapered rod 2 is selected and fixed to the connecting seat 10 by screwing through the connecting block 21, and then the connecting rod 42 is screwed on the connecting frame 41, and the non-screwed end of the connecting rod 42 is provided with a connecting plate 40; a through hole is provided on the connecting seat 10, and a guide sleeve 22 is passed through the through hole, and both ends of the pull rod 43 are passed through the guide sleeve 22, and the protruding end of one end of the pull rod 43 is provided with a limit block 431 abutting against the connecting plate 40, and the protruding end of the other end of the pull rod 43 is successively passed through the connecting seat 10 and the connecting block 21, wherein one end of the pull rod 43 passing through the connecting block 21 extends into the mounting hole 50, and the protruding end of the pull rod 43 is screwed and fixed to the clamping block 44, and the outer side wall of the clamping block 44 is arranged to fit the hole wall of the mounting hole 50.

[0031] At this time, the expansion sleeve 3 is located outside the conical rod 2 , and a conical hole matching the shape of the conical rod 2 is provided inside the expansion sleeve 3 .

[0032] When using, first turn the gear ( Figure 1 The position shown by the dotted line at the upper and middle end) is mounted on the support seat 5 through the expansion sleeve 3. Then, the hydraulic press 4 is started, and the support rod 45 drives the connecting frame 41, the connecting rod 42, the connecting plate 40 and the pull rod 43 to move downward synchronously, and the pull rod 43 then drives the clamping block 44 to move synchronously, that is, the expansion sleeve 3 engaged with the clamping block 44 is synchronously driven to move downward synchronously. At this time, the expansion sleeve 3 can be arranged on the outside of the conical rod 2 with the moving cover of the pull rod 43, and the upper part of the conical rod 2 extends into the conical hole of the expansion sleeve 3.

[0033] As the support rod 45 continues to move downward, finally, the expansion sleeve 3 is completely covered on the tapered rod 2, and the outer diameter of the expansion sleeve 3 increases with the shape of the tapered rod 2, and the outer wall of the expansion sleeve 3 fits the hole wall of the center hole of the gear to tighten the center hole of the gear, thereby achieving the purpose of tightening and fixing the gear.

[0034] After the processing is completed, the hydraulic press 4 is started again, and the support rod 45 drives the expansion sleeve 3 to move upward, the tapered hole of the expansion sleeve 3 is separated from the tapered rod 2, the outer diameter of the expansion sleeve 3 is reduced, and the center hole of the gear is no longer tightened, and the gear can be removed. This operation is repeated to achieve the purpose of quickly loading and unloading parts and ensuring the processing stability.

[0035] It should be noted that, since a limiting boss (not marked) is provided in the clearance hole 12, a closed space is formed between the limiting boss and the inner wall of the connecting frame 41. In order to prevent the air pressure in this space from affecting the displacement distance of the pull rod 43 and avoid the situation where the gear cannot be fixed due to the expansion sleeve 3 not expanding enough, a second exhaust hole 13 connected to the clearance hole 12 is provided on the outer wall of the base 1 to ensure smooth movement; similarly, in order to reduce the residual air between the block 44 and the mounting hole 50, prevent uneven expansion and tightening pressure from causing a large deviation in the clamping center, and avoid unilateral processing size and batch scrapping, a first exhaust hole 51 connected to the mounting hole 50 is provided on the outer wall of the support seat 5.

[0036] In addition, since the gear grinding process is to grind each tooth of the gear one by one, the waste slag particles formed by grinding are relatively small. The sealing ring 32 is provided to prevent the grinding waste slag from entering the clamping position between the annular boss 441 and the annular groove 31 and causing wear during use, thereby affecting the expansion sleeve 3 to be damaged and causing the tensioning deformation to fail, directly affecting the gear processing quality and the safety of the gear grinding process.

[0037] In order to ensure that the expansion sleeve 3 is not subjected to unilateral force during movement and to prevent the expansion sleeve 3 from being torn by the diagonal belt, two pull rods 43 should be symmetrically arranged or more than three pull rods 43 should be evenly arranged along the circumferential direction. Considering that the center hole of the product corresponding to this embodiment is relatively small (within 10 mm in diameter), it is preferably to symmetrically arrange two pull rods 43; the tension spring 6 is arranged to buffer the movement rate of the expansion sleeve 3, prevent the conical rod 2 from damaging the conical hole of the expansion sleeve 3, and ensure stability in use.

Claims

1. A small diameter medium hole gear grinding fixture, characterized by: The invention comprises a base (1) fixed on the grinding machine, a connecting seat (10) screwed on the base (1), a conical rod (2) detachably arranged on the connecting seat (10), and a pull rod assembly movably arranged on the base (1) and extending through the connecting seat (10), wherein the extending end of the pull rod assembly extends into a mounting hole (50) in the middle of a support seat (5), and the extending end of the pull rod assembly is provided with an expansion sleeve (3) sleeved on the outside of the conical rod (2).

2. A small diameter medium hole gear grinding fixture as claimed in claim 1, characterized in that: A connection block (21) is provided on one side of the conical rod (2); the support seat (5) is sleeved on the outside of the connection block (21) via a mounting hole (50); and the connection block (21) is screwed and fixed to the connection seat (10).

3. A small diameter medium hole gear grinding fixture as claimed in claim 2, characterized in that: The pull rod assembly comprises a hydraulic press (4) arranged on the grinding machine, a connecting frame (41) arranged in a clearance hole (12) in the middle of the base (1) and connected to the output end of the hydraulic press (4), and a connecting rod (42) threadedly connected to the connecting frame (41); a connecting plate (40) is provided at the non-threaded end of the connecting rod (42); a pull rod (43) is passed through the connecting plate (40); the protruding end of the pull rod (43) is then passed through the connecting seat (10) and the connecting block (21) in sequence; one end of the pull rod (43) protrudes from the connecting block (21) and extends into the mounting hole (50); the protruding end of the pull rod (43) is connected to a clamping block (44); the outer wall of the clamping block (44) is arranged to fit the hole wall of the mounting hole (50); and an expansion sleeve (3) is clamped on the clamping block (44).

4. A small diameter medium hole gear grinding fixture as claimed in claim 3, characterized in that: A through hole is provided on the connecting seat (10), and a guide sleeve (22) is inserted into the through hole. The protruding end of the guide sleeve (22) is further inserted through the connecting block (21) and abuts against the end surface of the corresponding end of the clamping block (44); both ends of the pull rod (43) are provided with the guide sleeve (22), and the protruding end of one end of the pull rod (43) is provided with a limit block (431) abutting against the connecting plate (40), and the protruding end of the other end of the pull rod (43) is screwed and connected to the clamping block (44).

5. The small diameter medium hole gear grinding fixture as claimed in claim 3, characterized in that: A connecting hole is provided in the middle of the clamping block (44), and an annular boss (441) is provided on the hole wall of the connecting hole in a circumferential direction; an annular groove (31) is provided on the outer wall of the expansion sleeve (3) at a position corresponding to the annular boss (441), and the annular boss (441) is clamped in the annular groove (31), so that the expansion sleeve (3) is connected and fixed to the clamping block (44).

6. A small diameter medium hole gear grinding fixture as claimed in claim 5, characterized in that: A groove is provided on the wall of the connection hole at a position above the annular boss (441) in a circumferential direction, a sealing ring (32) is provided in the groove, and the inner wall of the sealing ring (32) abuts against a corresponding position of the outer wall of the expansion sleeve (3).

7. A small diameter medium hole gear grinding fixture as claimed in claim 3, characterized in that: A support plate (11) is also provided in the clearance hole (12); the output end of the hydraulic press (4) is provided with a support rod (45) passing through the support plate (11) and connected to the connecting frame (41); the non-threaded end of the connecting frame (41) is connected to one end of a tension spring (6), and the other end of the tension spring (6) is connected to the inner side wall of the support plate (11).

8. The small diameter medium hole gear grinding fixture as claimed in claim 3, characterized in that: A first exhaust hole (51) communicating with the mounting hole (50) is provided on the outer side wall of the support seat (5); and a second exhaust hole (13) communicating with the clearance hole (12) is provided on the outer side wall of the base (1).

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