Clamp for shaft gear grinding machining

Abstract

The utility model belongs to the technical field of shaft gear grinding machining, and particularly relates to a clamp for shaft gear grinding machining. A clamp for shaft gear grinding machining comprises a fixing sleeve which is arranged on the outer side of the periphery of a center in a sleeving mode and rotates along with the center, and further comprises a linkage clamp which is matched with the fixing sleeve and used for clamping a shaft workpiece, and the linkage clamp is provided with a locking hole for the shaft workpiece to penetrate through and a locking structure capable of enabling the hole diameter of the locking hole to be reduced. The fixed sleeve is provided with a linkage groove with an opening in the axial direction of the center, the linkage clamp is provided with a linkage piece extending into the linkage groove, and an elastic piece capable of pressing the linkage piece is arranged in the linkage groove. After the elastic piece presses the linkage piece, the fixing sleeve and the linkage clamp can rotate synchronously. The linkage fixture has the advantage that the linkage fixture for the shaft workpieces can be conveniently disassembled and assembled.

Description

Technical Field

[0001] The utility model belongs to the technical field of shaft gear grinding processing, in particular to a fixture for shaft gear grinding processing. Background Art

[0002] Some shaft workpieces need to be ground on their circumferential outer walls, such as worms. Usually, when grinding shaft workpieces, a center is used to tighten the axial ends of the shaft workpiece to complete the positioning of the shaft workpiece. However, the center is relatively smooth, and when the center drives the shaft workpiece to rotate, it may slip, making it impossible for the shaft workpiece to rotate synchronously with the center. Usually, it is necessary to first set a clamp on the outside of the shaft workpiece and the outside of the center, and then fix the two clamps. When the center and the clamp of the center rotate together, the clamp of the center will drive the clamp on the outside of the shaft workpiece to rotate together, thereby completing the synchronous rotation of the shaft workpiece and the center.

[0003] For example, a Chinese patent application numbered 201220470837.9 discloses a two-top shaft gear grinding device, in which the top point passes through a platform top point attachment, a positioning chuck is provided on the outer side of the shaft workpiece, the platform top point attachment and the positioning chuck are connected by a slider, and the slider is fixed in the first T-slot by a fastening bolt and a fastening nut.

[0004] In the above scheme, each time the fastening bolt and the fastening nut are fixed, the operator needs to use a hexagonal wrench to turn the bolt to lock it, which is inconvenient for disassembly and assembly and has low efficiency. Utility Model Content

[0005] The utility model aims to provide a fixture for shaft gear grinding processing which is convenient for disassembling and assembling the linkage fixture of shaft workpieces.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a fixture for shaft gear grinding, comprising a fixed sleeve which is sleeved on the circumferential outer side of the center and rotates together with the center, and also comprising a linkage fixture which cooperates with the fixed sleeve and is used to clamp the shaft workpiece, the linkage fixture is provided with a locking hole for the shaft workpiece to pass through and a locking structure which can reduce the aperture of the locking hole; the fixed sleeve is provided with a linkage groove which is open along the axial direction of the center, the linkage fixture is provided with a linkage part which extends into the linkage groove, and the linkage groove is provided with an elastic part which can press the linkage part; when the elastic part presses the linkage part, the fixed sleeve and the linkage fixture can rotate synchronously.

[0007] When using this solution, the operator first fixes the fixed sleeve to the outside of the top, then fixes the linkage fixture to the outside of the shaft workpiece, then places the shaft workpiece between the tops, inserts the linkage part into the linkage groove, so that the elastic part presses the linkage part through elastic force, and then the top presses the two ends of the shaft workpiece. When the top rotates, the fixed sleeve rotates together with the linkage fixture, so that the shaft workpiece rotates together. After completing the gear grinding of the shaft workpiece, the top releases the shaft workpiece, and the operator directly pulls out the linkage part, so that the linkage part leaves the linkage groove, and the linkage fixture is separated from the fixed sleeve.

[0008] The fixing sleeve also has a locking structure, and the fixing sleeve can be any existing clamp that is sleeved on the outside of the top and rotates and fixed with the top synchronously. The elastic member can be any existing elastic member with elastic clamping function, such as a spring plunger, a knob plunger, etc.

[0009] This solution uses an elastic part to compress the linkage part so that the linkage part is confined in the linkage groove, thereby completing the linkage between the fixed sleeve and the linkage fixture, so that the fixed sleeve can drive the linkage fixture to rotate when it rotates; the operator does not need to use a hexagonal wrench to turn the bolt to lock it, which is more convenient for disassembly and assembly, and has higher efficiency. In addition, the conventional bolt tightening method is difficult to control the manual tightening force, so when tightening, the bolts are tightened too tight, causing the shaft workpiece to shift, affecting the top positioning, and directly affecting the tooth profile and tooth V value of the shaft workpiece after processing; compared with the rigid fixing method of bolt locking, this solution uses elastic compression, and the positioning of the shaft workpiece is still based on the top positioning, so the impact on the tooth profile and tooth V value of the shaft workpiece after processing is small.

[0010] Preferably, the number of the linkage grooves is two, and the two linkage grooves are respectively located on two opposite sides of the fixing sleeve.

[0011] Since the angle of the center is uncertain when it stops rotating, if the linkage slot is located on the other side of the operator's installation position after rotation, it is inconvenient for the operator to disassemble and install the linkage fixture. Therefore, by setting two linkage slots and the linkage slots are located on the opposite sides of the fixed sleeve, it can be ensured that every time the center stops rotating, there is always a linkage slot located on the operator's installation position side, which is convenient for the operator to install.

[0012] Preferably, the groove walls on opposite sides of the linkage groove are provided with threaded holes, one of which is threadedly engaged with a limiting bolt, and the end of the limiting bolt is used to contact the linkage part; the elastic part is a spring plunger, and the spring plunger is provided with a threaded section, and the other threaded hole is threadedly engaged with the threaded section of the spring plunger.

[0013] The spring plunger can adjust the screwing distance, and the screwing of the limit bolt can also adjust the end length screwed into the linkage groove, so that linkage parts of different sizes can be clamped, thereby ensuring the accuracy of clamping. Among them, the spring plunger is any spring plunger or ball plunger that can realize spiral locking.

[0014] Preferably, the threaded section of the spring plunger is equipped with a fastening nut.

[0015] The spring plunger can be fixed more firmly by screwing the fastening nut. After the spring plunger is screwed and the position is adjusted, the fastening nut is screwed onto the threaded section of the spring plunger, and the fastening nut is tightened so that the spring plunger cannot rotate after adjustment, thereby ensuring the end extension distance of the spring plunger.

[0016] Preferably, the linkage member and the linkage clamp are detachably fixed, the linkage clamp is provided with a matching groove matching with the linkage member, and the outer wall of the linkage member is in contact and matching with the groove wall of the matching groove.

[0017] The position of the linkage member on the linkage fixture is positioned by means of surface-to-surface contact between the matching groove and the linkage member.

[0018] Preferably, the linkage clamp is provided with a radially penetrating locking groove, the locking groove is connected to the locking hole, the groove walls on opposite sides of the locking groove are provided with threaded holes, and a locking bolt is provided in the threaded hole. When the locking bolt is screwed, the aperture of the locking hole is reduced; the locking groove and the locking bolt constitute the locking structure.

[0019] The locking bolt is screwed to reduce the diameter of the locking hole, thereby locking the shaft workpiece.

[0020] Preferably, the fixing sleeve is provided with an axially extending extension portion, and the linkage groove is arranged on the extension portion.

[0021] The extension part can be provided to facilitate observation by operators when pre-positioning the shaft workpiece and the center, and also facilitate the coordination between the linkage part and the linkage groove.

[0022] Preferably, the linkage groove penetrates the extension portion in the radial direction of the fixing sleeve.

[0023] The linkage groove radially penetrates the extension part, which can facilitate the disassembly and assembly of the linkage part.

[0024] The utility model has the advantage of being easy to disassemble and assemble the linkage clamp of the shaft workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the utility model when positioning shaft workpieces.

[0026] Figure 2 for Figure 1 Enlarged view of point A.

[0027] Figure 3 It is a structural schematic diagram of the fixing sleeve of the utility model.

[0028] Figure 4 It is a structural schematic diagram of the linkage clamp of the utility model.

[0029] Figure 5 for Figure 1 sectional view of .

[0030] Figure 6 for Figure 1 A cross-sectional view from another angle.

[0031] Figure numbers: 1. Fixed sleeve; 11. Fixed sleeve part 1; 12. Fixed sleeve part 2; 2. Linkage clamp; 21. Locking groove; 211. Locking bolt; 3. Linkage groove; 4. Linkage part; 41. Screw; 51. Limit bolt; 52. Elastic part; 521. Fastening nut; 6. Extension part; 100. Shaft workpiece; 200. Center. DETAILED DESCRIPTION

[0032] The utility model is further described below based on the accompanying drawings and specific embodiments.

[0033] like Figure 1 and Figure 2 As shown, this embodiment discloses a fixture for shaft gear grinding, including a fixed sleeve 1 which is sleeved on the outside of a center point 200 and clamps the center point 200, and also includes a linkage fixture 2 which cooperates with the fixed sleeve 1 and is sleeved on the outside of a shaft workpiece 100 and clamps the shaft workpiece 100. The linkage fixture 2 realizes linkage with the fixed sleeve 1 through a linkage part 4.

[0034] like Figure 3 and Figure 6As shown, the fixed sleeve 1 includes two fixed sleeve parts 11 and 12 symmetrically arranged in the upper and lower parts. The fixed sleeve part 11 and the fixed sleeve part 12 are both provided with semicircular grooves, and the two semicircular grooves together surround a through hole for the top 200 to pass through. The fixed sleeve part 11 and the fixed sleeve part 12 are both provided with internal threaded holes, and the aperture of the through hole is reduced by screwing the bolts to clamp the top 200, and the fixed sleeve 1 and the top 200 rotate synchronously. The fixed sleeve part 11 and the fixed sleeve part 12 are both provided with an axially extending extension part 6, and the two extension parts 6 are both provided with a linkage groove 3 that is axially opened and radially penetrated. The extension part 6 is provided with two threaded holes, and the two threaded holes are connected to the linkage groove 3 and are respectively located at the groove walls on the opposite sides of the linkage groove 3. One threaded hole is threadedly matched with a limiting bolt 51, and the other threaded hole is threadedly matched with an elastic member 52 with a threaded section, and the elastic member 52 is any existing elastic plunger. The end of the elastic member 52 is a sphere and elastically expands and contracts in the linkage groove 3. The threaded section of the elastic member 52 is threadedly matched with a fastening nut 521. When the linkage member 4 extends into the linkage groove 3, the end of the elastic member 52 will press the linkage member 4, and the other end of the linkage member 4 will contact the end of the limit bolt 51. There are two linkage grooves 3, which are respectively located on opposite sides of the fixing sleeve 1.

[0035] like Figure 2 as well as Figures 4 to 6 As shown, the linkage clamp 2 includes a radially penetrating locking groove 21, and an axially penetrating clamping hole is provided at the center of the linkage clamp 2, the clamping hole is connected to the locking groove 21, and the linkage clamp 2 is provided with threaded holes (not shown in the figure) at the groove walls on both sides of the locking groove 21. The locking bolt 211 is screwed to reduce the width of the locking groove 21 so as to reduce the aperture of the clamping hole and clamp the shaft workpiece 100. The upper end of the linkage clamp 2 is provided with a matching groove (not shown in the figure) that opens upward and penetrates axially, and the matching groove cooperates with the linkage member 4, and the two are detachably fixed by screws 41.

[0036] When in use, the operator first sets the fixing sleeve 1 on the outside of the top 200 and adjusts the position of the fixing sleeve 1 so that the fixing sleeve 1 is located at the front end of the top 200, and then screws the bolt so that the fixing sleeve 1 clamps the top 200 and can rotate synchronously with the top 200. Then, the linkage clamp 2 is set on one end of the shaft workpiece 100 and the position of the linkage clamp 2 is adjusted. Then, the linkage clamp 2 is tightened by tightening the locking bolt 211. Then, the operator places the linkage clamp 2 between the tops 200, and extends the linkage member 4 of the linkage clamp 2 into the linkage groove 3 of the fixing sleeve so that the ball head of the elastic member 52 presses the linkage member 4. At this time, one top 200 has been pre-tightened to one end of the shaft workpiece. Then, the machine tool moves so that the top 200 and the other top 200 presses the other end of the shaft workpiece, so that both ends of the shaft workpiece 100 are tightened, and finally the machine tool is started, so that the shaft workpiece 100 rotates and performs gear grinding. After the gear grinding process is completed, the center 200 releases the shaft workpiece 100, and the operator directly pulls out the linkage fixture 2 and proceeds to load the next shaft workpiece 100.

Claims

1. A fixture for shaft gear grinding, comprising a fixed sleeve which is sleeved on the outer side of the top in the circumferential direction and rotates together with the top, and a linkage fixture which cooperates with the fixed sleeve and is used to clamp the shaft workpiece, wherein the linkage fixture is provided with a locking hole for the shaft workpiece to pass through and a locking structure capable of reducing the diameter of the locking hole, characterized in that: The fixed sleeve is provided with a linkage groove opening along the axial direction of the top, the linkage clamp is provided with a linkage piece extending into the linkage groove, and the linkage groove is provided with an elastic piece capable of pressing the linkage piece; when the elastic piece presses the linkage piece, the fixed sleeve and the linkage clamp can rotate synchronously.

2. The fixture for shaft gear grinding according to claim 1, characterized in that: The number of the linkage grooves is two, and the two linkage grooves are respectively located on two opposite sides of the fixing sleeve.

3. The fixture for shaft gear grinding according to claim 1, characterized in that: The groove walls on opposite sides of the linkage groove are provided with threaded holes, one of which is threadedly matched with a limiting bolt, and the end of the limiting bolt is used to contact the linkage part; the elastic part is a spring plunger, and the spring plunger is provided with a threaded section, and the other threaded hole is threadedly matched with the threaded section of the spring plunger.

4. The fixture for shaft gear grinding according to claim 3, characterized in that: The threaded section of the spring plunger is matched with a fastening nut.

5. The fixture for shaft gear grinding according to any one of claims 1 to 4, characterized in that: The linkage piece and the linkage clamp are detachably fixed, the linkage clamp is provided with a matching groove matching with the linkage piece, and the outer wall of the linkage piece is in contact with the groove wall of the matching groove.

6. The fixture for shaft gear grinding according to claim 1, characterized in that: The linkage clamp is provided with a radially penetrating locking groove, the locking groove is connected to the locking hole, the groove walls on opposite sides of the locking groove are provided with threaded holes, and locking bolts are provided in the threaded holes. When the locking bolts are screwed, the aperture of the locking hole is reduced; the locking groove and the locking bolt constitute the locking structure.

7. The fixture for shaft gear grinding according to any one of claims 1 to 4, characterized in that: The fixing sleeve is provided with an axially extending extension portion, and the linkage groove is arranged on the extension portion.

8. The fixture for shaft gear grinding according to claim 7, characterized in that: The linkage groove penetrates the extension portion along the radial direction of the fixing sleeve.

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