Rapid part replacing clamp for shaft gear grinding
By designing a quick replacement clamp for shaft grinding teeth, the movement of the active rod and the driven rod drive the clamp to get close and away, the time-consuming and labor-intensive problem of clamping shaft workpieces is solved, and the rapid replacement and efficient processing of shaft workpieces are achieved.
Patent Information
- Application Number
- CN202421239860.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-05-31
AI Technical Summary
Shaft clamping is time-consuming and labor-intensive during grinding teeth. In the prior art, multiple screws need to be adjusted simultaneously to align the outer circle and tighten it, which is cumbersome and time-consuming.
A quick change clamp of shaft grinding teeth is designed, and the proximity and distance between the first clamp block and the second clamp block is driven by moving the opposite direction of the driving rod and the driven rod, so as to achieve rapid tightening of the outer circle of the shaft workpiece.
The clamping process is simplified, the operating steps are reduced, the processing efficiency is improved, the production cost is reduced, and the structural design is easy to disassemble and assemble, which is easy to maintain and clean, ensuring the reliability of long-term use.
Smart Images
Figure CN222552366U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of clamping devices, in particular to a quick-changing fixture for shaft gear grinding. Background Art
[0002] Shaft workpieces are a common type of workpiece. They are rotating bodies with a length generally greater than their diameter. They are widely used in various mechanical equipment to support transmission components, transmit torque and bear loads.
[0003] Gear grinding machines are used for the grinding of shaft workpieces. Reference for clamping shaft workpieces on gear grinding machines Figure 1 There are mainly three ways. One is to use the upper center hole of the top of the shaft workpiece 2 with the upper center point 1 of the gear grinding machine, and use a fixture with 4 screws to align the outer circle and tighten it under the workpiece; the second is to use 4 screws on the top and 4 screws on the bottom, that is, only rely on the screws on the fixture to tighten the upper and lower outer circles of the workpiece 2; the third is double-top, the upper center hole of the gear grinding machine is supported, the lower center hole is provided on the fixture and the lower center hole 3 is supported at the bottom of the shaft workpiece 2, and then an additional tooling auxiliary tool is added to drive the shaft workpiece 2 to rotate.
[0004] The above three clamping methods have their own advantages and disadvantages. The first two methods are more troublesome, time-consuming and labor-intensive when aligning the outer circle; the last method requires first lifting the shaft workpiece, then locking the tooling accessories on the outer circle of the workpiece, and then lifting the entire workpiece between the gear grinder and the fixture, and completing the double top through the cooperation of the upper and lower tops. There are more steps and it is still time-consuming and labor-intensive. Utility Model Content
[0005] The utility model provides a quick-changing fixture for shaft gear grinding, which can solve the technical problem that it is time-consuming and laborious to clamp shaft workpieces during gear grinding processing, and helps to improve the processing efficiency of shaft workpieces.
[0006] This application provides the following technical solutions:
[0007] A quick-changing fixture for shaft gear grinding comprises a base and bosses fixedly arranged on both sides of the base, a lower top is fixedly arranged in the center of the base, two groups of double-sided holes are arranged in parallel on the boss and pass through the two bosses at the same time, an active rod and a driven rod are slidably arranged in the two groups of double-sided holes respectively, a single-sided hole that only passes through one of the bosses is also arranged between the two groups of double-sided holes, a transmission rod is fixedly arranged in the single-sided hole, a strip plate is rotatably connected to the upper side of the active rod, the driven rod and the transmission rod near the boss where the single-sided hole is arranged, a first clamping block and a second clamping block for clamping the outer circle of the shaft workpiece are relatively arranged on the active rod and the driven rod, the first clamping block is fixedly connected to the active rod, the first clamping block is slidably connected to the driven rod, the second clamping block is slidably connected to the active rod, and the second clamping block is fixedly connected to the driven rod.
[0008] Beneficial effect: This scheme proposes a quick-changing fixture for shaft gear grinding, which drives the first clamp and the second clamp to approach and move away from each other by moving the active rod and the driven rod in opposite directions, thereby replacing the clamping method in the prior art that requires simultaneous adjustment of the four screws on the fixture to find the outer circle of the shaft part and tighten it. It is only necessary to control the movement of the active rod to complete the tightening of the outer circle of the shaft workpiece. The fixture has simplified steps for use, which improves the work efficiency of the operator. The lower center is set in the center of the boss, which is conducive to the accurate positioning of the shaft workpiece, which is of positive significance to improving the production efficiency of the production unit and reducing the production cost. The structural design is easy to disassemble and assemble, and is convenient for maintenance and cleaning, ensuring reliability during long-term use.
[0009] Further, as an improvement, strip-shaped through grooves are provided on both sides of the strip plate and are rotatably connected to the active rod and the driven rod respectively, and a through hole is provided in the middle of the strip plate and is rotatably connected to the transmission rod.
[0010] Beneficial effect: The arrangement of the strip-shaped through groove prevents interference from occurring when the active rod and the driven rod are moved in opposite directions.
[0011] Further, as an improvement, a fastening screw for fixing the active rod is installed on the boss.
[0012] Beneficial effect: The function of the fastening screw is to limit the movement of the active rod, which is beneficial to improving the stability of the first clamping block and the second clamping block in clamping the outer circle of the shaft workpiece.
[0013] Further, as an improvement, a steel ball is fixedly disposed at the end of the fastening screw, and a hemispherical hole is disposed on the surface of the active rod, and when the first clamping block is clamped with the second clamping block, the steel ball can be inserted into the hemispherical hole.
[0014] Beneficial effect: The steel ball at the end of the fastening screw is inserted into the hemispherical hole and jammed, which is beneficial to limiting the movement of the active rod and improving the grinding accuracy of shaft workpieces.
[0015] Furthermore, as an improvement, a plane is provided on the surface of the active rod, and when the first clamping block and the second clamping block are clamped, the end face of the fastening screw can directly abut against the plane.
[0016] Beneficial effect: Compared with the fixing method of inserting a steel ball into a hemispherical hole, the fixing method of using the end face of the fastening screw to directly press against the plane opened on the surface of the active rod can be used to clamp more shaft parts of different specifications and has a wider range of use.
[0017] Further, as an improvement, a lifting ring is fixedly provided on the boss.
[0018] Beneficial effect: The fixture is designed to be heavy, and a lifting ring is set on the boss to facilitate lifting and moving using a crane.
[0019] Further, as an improvement, V-shaped through grooves are provided on the opposite surfaces of the first clamping block and the second clamping block.
[0020] Beneficial effects: The V-shaped through groove can stably clamp the outer circle of the shaft workpiece, and can adapt to shaft workpieces of different specifications, and the fixture has good versatility. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a front view of a shaft workpiece in the prior art when it is fixed by an upper center and a lower center;
[0022] Figure 2 This is an axonometric view of the first embodiment of the present utility model;
[0023] Figure 3 for Figure 2 Schematic diagram of the structure of the middle active rod and the fastening screw;
[0024] Figure 4 This is a front view of the first embodiment of the utility model when clamping a shaft workpiece;
[0025] Figure 5 The second embodiment of the present utility model corresponds to Figure 3 Schematic diagram of the structure. DETAILED DESCRIPTION
[0026] The following is further described in detail through specific implementation methods:
[0027] The marks in the drawings of the specification include: upper center 1, shaft workpiece 2, lower center 3, base 4, boss 5, double-sided hole 51, single-sided hole 52, active rod 6, handle 61, hemispherical hole 62, driven rod 7, transmission rod 8, strip plate 9, strip through groove 91, plane 10, first clamping block 11, V-shaped through groove 111, weight reduction hole 112, second clamping block 12, fastening screw 13, steel ball 14.
[0028] Embodiment 1
[0029] Combination Figure 2-Figure 4As shown, a quick-changing fixture for shaft gear grinding includes a base 4 and two bosses 5 fixedly arranged on both sides of the base 4. The base 4 and the bosses 5 on both sides are integrally formed and have an overall U-shaped structure. A lower top 3 for supporting the lower center hole of the shaft workpiece 2 is welded and fixed in the center of the base 4. Two groups of double-sided holes 51 are arranged in parallel on the boss 5. The double-sided hole 51 refers to a circular through hole opened on both sides of the boss 5. The two opposite circular through holes arranged on the two bosses 5 are collectively referred to as a group of double-sided holes 51. An active rod 6 and a driven rod 7 are respectively slidably arranged in the two groups of double-sided holes 51. The part of the active rod 6 extending beyond the boss 5 is a handle 61. A single-sided hole 52 is also arranged between the two groups of double-sided holes 51. The single-sided hole 52 is a circular internal threaded hole and is only arranged on one of the bosses 5. A transmission rod 8 is connected to the internal thread of the single-sided hole 52.
[0030] A strip plate 9 is rotatably connected to the upper side of the boss 5 near the single-sided hole 52 on the active rod 6, the driven rod 7, and the transmission rod 8. The specific method of the rotation connection is: first, a strip plate 9 is opened on each of the active rod 6, the driven rod 7, and the transmission rod 8. Figure 2 The plane 10 shown is used to contact the strip plate 9. Strip through grooves 91 are set on both sides of the strip plate 9. A screw is inserted into each of the strip through grooves 91 on both sides and is threadedly connected to the active rod 6 and the driven rod 7 respectively. A clearance fit is adopted between the screw and the strip through groove 91. A through hole is set in the middle position of the strip plate 9. A screw is inserted into the through hole and is threadedly connected to the transmission rod. The screw and the through hole are clearance-fitted.
[0031] A first clamping block 11 and a second clamping block 12 for clamping the outer circle of the shaft workpiece 2 are arranged opposite to each other on the active rod 6 and the driven rod 7. V-shaped through grooves 111 are arranged on the opposite surfaces of the first clamping block 11 and the second clamping block 12, and weight-reducing holes 112 are also arranged on the end surfaces thereof for reducing the weight of the first clamping block 11 and the second clamping block 12. The first clamping block 11 is fixedly connected to the active rod 6, the first clamping block 11 is slidably connected to the driven rod 7, the second clamping block 12 is slidably connected to the active rod 6, and the second clamping block 12 is fixedly connected to the driven rod 7.
[0032] A fastening screw 13 for fixing the active rod 6 is installed on the boss 5, and a steel ball 14 is fixedly set at the end of the fastening screw 13. The fastening screw 13 can be a standard screw. First, a hole is drilled at its end and then the steel ball 14 is pushed in. A hemispherical hole 62 is set on the surface of the active rod 6. The diameter of the hemispherical hole 62 is 2 mm smaller than the diameter of the part of the steel ball 14 extending out of the standard screw. When the first clamp 11 and the second clamp 12 clamp the shaft workpiece 2, the steel ball 14 can be partially inserted into the hemispherical hole 62 to limit the movement of the active rod 6.
[0033] Lifting holes are provided on the tops of the bosses 5 on both sides. The lifting holes are internal threaded holes. Lifting rings are installed in the lifting holes for lifting the whole set of clamps.
[0034] The specific application process includes the following steps:
[0035] S1. Use a crane to hoist the entire set of fixture onto the workbench, use a dial to align the taper part of the lower center 3 to ensure that the runout is no more than 0.01mm, and place a pressure plate on the boss 5 to press it onto the workbench and fix it.
[0036] S2. Hold the handle 61 of the active rod 6 and move it to Figure 2 The active rod 6 is pushed forward in the direction A shown in the figure, and the first clamping block 11 fixedly connected to the active rod 6 moves in the direction away from the lower top 3. At the same time, the side of the strip plate 9 close to the active rod 6 moves along the direction A and drives the side of the strip plate 9 close to the driven rod 7 to move in the opposite direction, so that the first clamping block 11 and the second clamping block 12 move away from each other to release the space for clamping the shaft workpiece 2
[0037] S3. Figure 4 As shown, the upper center hole of the shaft workpiece 2 is supported by the upper center point 1 of the gear grinding machine, and the lower center hole of the workpiece is supported by the lower center point 3 of the base 4.
[0038] S4. Figure 2 As shown in FIG. 1 , the handle 61 of the active rod 6 is pulled in the opposite direction of the A direction, and the first clamping block 11 and the second clamping block 12 simultaneously move toward the top until they are combined. Figure 2 and Figure 4 The surfaces of the V-shaped through grooves 111 on the first clamping block 11 and the second clamping block 12 are tightly attached to the outer circle of the shaft workpiece 2 .
[0039] S5. Tighten the fastening screw 13 on the boss 5 downward, and the steel ball 14 at the end of the fastening screw 13 is partially inserted into the hemispherical hole 62 on the active rod 6 to limit the movement of the active rod 6.
[0040] Embodiment 2
[0041] The difference between this embodiment and the first embodiment is that Figure 5 As shown, a plane 10 is opened on the surface of the active rod 6 to replace the hemispherical hole 62 in the first embodiment, and the steel ball 14 on the end face of the fastening screw 13 is removed. When the first clamping block 11 and the second clamping block 12 are clamped, the end face of the fastening screw 13 can directly press against the plane 10.
[0042] The above is only an embodiment of the utility model. The utility model is not limited to the field involved in this implementation case. The common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.
Claims
1. A quick-change fixture for shaft gear grinding, characterized in that: It includes a base and bosses fixedly arranged on both sides of the base, a lower top is fixedly arranged in the center of the base, two groups of double-sided holes are arranged in parallel on the boss and pass through the two bosses at the same time, an active rod and a driven rod are slidably arranged in the two groups of double-sided holes respectively, a single-sided hole that only passes through one of the bosses is also arranged between the two groups of double-sided holes, a transmission rod is fixedly arranged in the single-sided hole, a strip plate is rotatably connected to the upper side of the active rod, the driven rod and the transmission rod near the boss where the single-sided hole is arranged, a first clamping block and a second clamping block for clamping the outer circle of a shaft workpiece are relatively arranged on the active rod and the driven rod, the first clamping block is fixedly connected to the active rod, the first clamping block is slidably connected to the driven rod, the second clamping block is slidably connected to the active rod, and the second clamping block is fixedly connected to the driven rod.
2. The quick-change fixture for shaft gear grinding according to claim 1, characterized in that: Strip-shaped through grooves are arranged on both sides of the strip plate and are rotatably connected to the active rod and the driven rod respectively. A through hole is arranged in the middle of the strip plate and is rotatably connected to the transmission rod.
3. The quick-change fixture for shaft gear grinding according to claim 2, characterized in that: Install a set screw on the boss for fixing the active rod.
4. The quick-change fixture for shaft gear grinding according to claim 3, characterized in that: A steel ball is fixedly arranged at the end of the fastening screw, and a hemispherical hole is arranged on the surface of the active rod. When the first clamping block and the second clamping block are clamped, the steel ball can be inserted into the hemispherical hole.
5. The quick-change fixture for shaft gear grinding according to claim 3, characterized in that: A plane is provided on the surface of the active rod, and when the first clamping block and the second clamping block are clamped, the end surface of the fastening screw can directly abut against the plane.
6. A quick-change fixture for shaft gear grinding according to claim 4 or 5, characterized in that: A lifting ring is fixedly arranged on the boss.
7. The quick-change fixture for shaft gear grinding according to claim 6, characterized in that: V-shaped through grooves are arranged on the opposite surfaces of the first clamping block and the second clamping block.