Quick-change clamp for gear grinding machining of long-shaft tooth worm

Abstract

The utility model provides a quick-change clamp for gear grinding processing of a long-shaft tooth worm, which comprises a base cylinder body fixedly mounted on a working table of a gear grinding machine through a bolt; the clamp body is fixedly installed at the upper end of the base cylinder body through a bolt, a clamping hole is formed in the axis of the clamp body, and the clamping hole is of a stepped hole-shaped structure; the base cylinder body is fixedly installed on a gear grinding machine workbench through bolts, and the positioning rotation center of the clamp is guaranteed. The expansion sleeve and the clamp body are matched through a conical surface and an outer circle to ensure the coaxiality, and are limited through a set screw to prevent the expansion sleeve from being self-loosened and self-tightened; the piston drives the expansion sleeve to be adjusted in a lifting mode so as to clamp or loosen a workpiece, the bottom of the workpiece abuts against the tip, and the depth of the workpiece inserted into the clamping hole can be adjusted by replacing the tip so as to adjust the clamping position of the expansion sleeve. The device solves the problems that new energy products are high in development input and poor in clamp universality, gear grinding quick-change machining of long-shaft gear products can be achieved, and the development input cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of gear grinding fixtures, in particular to a quick-change fixture used for gear grinding of worm gears of long-shaft gears. Background Art

[0002] New energy long-axis gear products have entered the OTS tooling prototype stage. In order to ensure a rapid transition to mass production and ensure product accuracy, the products need to be transferred to worm gear grinding equipment. Existing gear grinding fixtures are generally designed according to product size. The product installation is cumbersome, resulting in low processing efficiency, and the fixture has poor versatility. Considering the cost investment in project development and ensuring the delivery cycle, a more universal quick-change fixture is needed. Utility Model Content

[0003] The technical problem solved by the utility model is to provide a quick-change fixture for long-axis gear worm gear grinding processing to solve the problems raised in the above-mentioned background technology.

[0004] The technical problem solved by the utility model is achieved by adopting the following technical solution: a quick-change fixture for long-axis gear worm gear grinding, comprising:

[0005] A base cylinder body, which is fixedly mounted on a gear grinding machine workbench by bolts;

[0006] A clamping body, which is fixedly mounted on the upper end of the base cylinder body by bolts, and a clamping hole is provided at the axis of the clamping body, and the clamping hole is a stepped hole structure;

[0007] A piston, which is movably mounted at the bottom of the clamp hole, wherein the upper end of the piston is sealed and connected to the inner wall of the clamp body through a first sealing ring, and the outer wall of the lower end of the piston is sealed and connected to the inner wall of the clamp body through a second sealing ring, and an oil pressure space is formed between the piston and the inner wall of the clamp body through the first sealing ring and the second sealing ring to control the movement of the piston;

[0008] The expansion sleeve is built into the clamping hole and can be detachably installed on the upper end of the piston to be driven up and down by the piston. The inner cavity wall of the clamp body and the outer circle of the expansion sleeve are fitted to ensure that the expansion sleeve and the clamp body are coaxial. The inner cavity wall of the clamp body and the expansion sleeve are matched through a taper to clamp the workpiece inserted into the expansion sleeve when the expansion sleeve descends.

[0009] As a further solution of the utility model:

[0010] The upper end of the base cylinder block is provided with a pedestal column, which is inserted into the clamping hole to improve the stability of the fixture installation. At the corresponding position at the lower end of the piston, a first cylindrical pin is embedded and installed, and the first cylindrical pin is slidably inserted into the corresponding pin hole of the base cylinder block. At the corresponding position at the upper end of the piston, a second cylindrical pin is embedded and installed, and the second cylindrical pin is slidably inserted into the corresponding pin hole on the inner wall of the fixture to prevent the piston from rotating and improve the stability of the piston.

[0011] As a further solution of the present utility model:

[0012] The base cylinder block is provided with a first oil hole connected to an external oil supply device, and the fixture is provided with a second oil hole connected to the first oil hole. The second oil hole is communicated with the oil pressure space to inject or discharge oil into the oil pressure space. A gasket is provided at the connection of the first oil hole and the second oil hole to prevent hydraulic oil from spilling.

[0013] As a further solution of the present utility model:

[0014] A plurality of elastic holes are annularly distributed on the upper end of the base cylinder block corresponding to the piston, and springs are installed in the elastic holes. The upper ends of the springs abut against the lower end of the piston. When the hydraulic oil in the oil pressure space is discharged, the spring provides the driving force for the piston to move upward.

[0015] As a further solution of the present utility model:

[0016] A center point is installed at the upper end of the axis position of the base cylinder block. The center point is fixed to the base cylinder block by Morse taper fit. The center point is used for positioning the bottom of the workpiece.

[0017] As a further solution of the present utility model:

[0018] The lower end of the expansion sleeve is inserted into the central hole of the piston and is fixedly connected to the piston by threads. The upper end of the expansion sleeve expands outward obliquely. A plurality of vertical clamping holes are annularly distributed at the upper end of the expansion sleeve to facilitate the contraction and clamping of the expansion sleeve. The upper end of the fixture is provided with a conical surface corresponding to the expansion sleeve. The expansion sleeve and the fixture ensure coaxiality through the cooperation of the conical surface and the outer circle. A set screw is installed on one side of the fixture to limit the expansion sleeve to prevent the expansion sleeve from loosening and tightening itself.

[0019] Compared with the prior art, the beneficial effects of the utility model are as follows: Insert the shaft of the workpiece into the clamping hole, and the center point abuts against the lower end of the workpiece. After the oil pressure space is filled with oil, the pressure is transmitted to the piston, giving the piston a downward pulling force, driving the expansion sleeve to move downward. The expansion sleeve and the fixture body are guided to move downward through the outer circle fit, and the expansion sleeve is tightened by the taper fit to clamp and fix the workpiece, facilitating the subsequent processing of the workpiece. When the oil pressure space is drained of oil, the pressure is removed, and the piston is pushed up by the springs distributed on the base cylinder block, and the force is sequentially transmitted to the expansion sleeve, and the workpiece is released, completing the rapid disassembly and assembly of the workpiece. The center point and the expansion sleeve in this device are detachably installed, and can be quickly replaced according to different long shaft products, improving the versatility of the device.

[0020] The base cylinder block is fixedly installed on the grinding machine workbench through bolts to ensure the positioning and rotation center of the fixture; the coaxiality between the expansion sleeve and the fixture body is ensured through the cooperation of the taper surface and the outer circle, and is limited by the set screw to prevent the expansion sleeve from loosening and tightening itself; the piston drives the expansion sleeve to move up and down to clamp or release the workpiece. The bottom of the workpiece abuts against the center point, and the depth of the workpiece inserted into the clamping hole can be adjusted by replacing the center point to adjust the clamping position of the expansion sleeve.

[0021] This device solves the problems of high investment in the development of new energy products and poor versatility of fixtures, and can realize the quick-change grinding of long shaft gear products, saving the development investment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a three-dimensional structural schematic diagram of the utility model;

[0023] Figure 2 is a structural schematic diagram of the fixture body of the utility model;

[0024] Figure 3 is a structural schematic diagram of the piston of the utility model;

[0025] Figure 4 is a structural schematic diagram of the expansion sleeve of the utility model;

[0026] Reference numerals in the figures: 1. Base cylinder block; 2. Fixture body; 3. Piston; 4. Expansion sleeve; 5. Workpiece; 6. Center point; 11. Table column; 12. First oil hole; 13. Spring; 21. Clamping hole; 22. Second oil hole; 23. Taper surface; 24. Set screw; 31. First sealing ring; 32. Second sealing ring; 33. Oil pressure space; 34. First cylindrical pin; 35. Second cylindrical pin. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] In order to make the implementation means, creative features, achieved purposes and effects of the utility model easy to understand, the utility model will be further described below with reference to specific illustrations.

[0028] As Figures 1 to 4 shown,

[0029] This embodiment provides a quick-change fixture for grinding long-axis gear-shaped worm gears, including:

[0030] A base cylinder block 1, which is fixedly installed on the grinding machine workbench by bolts;

[0031] A fixture body 2, which is fixedly installed on the upper end of the base cylinder block 1 by bolts. A clamping hole 21 is provided at the axis of the fixture body 2, and the clamping hole 21 is a stepped hole structure;

[0032] A piston 3, which is movably installed at the bottom of the clamping hole 21. The upper end of the piston 3 is hermetically connected to the inner wall of the fixture body 2 through a first sealing ring 31, and the outer wall of the lower end of the piston 3 is hermetically connected to the inner wall of the fixture body 2 through a second sealing ring 32. An oil pressure space 33 is formed between the piston 3 and the inner wall of the fixture body 2 through the first sealing ring 31 and the second sealing ring 32 to control the movement of the piston 3;

[0033] An expansion sleeve 4, which is built in the clamping hole 21 and is detachably installed at the upper end of the piston 3 to drive the lifting through the piston 3. The inner cavity wall of the fixture body 2 is fitted with the outer circle of the expansion sleeve 4 to ensure that the expansion sleeve 4 and the fixture body 2 are coaxial. The inner cavity wall of the fixture body 2 and the expansion sleeve 4 are arranged in taper fit to clamp the workpiece 5 inserted into the expansion sleeve 4 when the expansion sleeve 4 descends.

[0034] In this embodiment, a pedestal 11 is provided at the upper end of the base cylinder block 1. The pedestal 11 is inserted into the clamping hole 21 to improve the installation stability of the fixture body 2. A first cylindrical pin 34 is embedded and installed at the corresponding position at the lower end of the piston 3, and the first cylindrical pin 34 is slidably inserted into the corresponding pin hole of the base cylinder block 1. A second cylindrical pin 35 is embedded and installed at the corresponding position at the upper end of the piston 3, and the second cylindrical pin 35 is slidably inserted into the corresponding pin hole on the inner wall of the fixture body 2 to prevent the piston 3 from rotating and improve the stability of the piston 3.

[0035] A first oil hole 12 connected to an external oil supply device is provided on the base cylinder block 1. A second oil hole 22 connected to the first oil hole 12 is provided on the fixture body 2. The second oil hole 22 is communicated with the oil pressure space 33 to inject or discharge oil into the oil pressure space 33. A gasket is provided at the connection between the first oil hole 12 and the second oil hole 22 to prevent hydraulic oil from spilling.

[0036] A plurality of bullet holes are annularly distributed on the upper end of the base cylinder block 1 corresponding to the piston 3. Springs 13 are installed in the bullet holes, and the upper ends of the springs 13 abut against the lower end of the piston 3. When the hydraulic oil in the oil pressure space 33 is discharged, the spring 13 provides a driving force for the piston 3 to move upward.

[0037] A center point 6 is installed at the upper end of the axis position of the base cylinder block 1. The center point 6 is fixed to the base cylinder block 1 through Morse taper fit, and the center point 6 is used to position the bottom of the workpiece 5.

[0038] In this embodiment, the lower end of the expansion sleeve 4 is inserted into the central hole of the piston 3 and is fixedly connected to the piston 3 by threads. The upper end of the expansion sleeve 4 expands obliquely outwards. A plurality of vertical clamping holes 21 are annularly distributed at the upper end of the expansion sleeve 4 to facilitate the contraction and clamping of the expansion sleeve 4. A conical surface 23 matching with the expansion sleeve 4 is provided at the upper end of the clamping body 2. The coaxiality between the expansion sleeve 4 and the clamping body 2 is ensured by the cooperation of the conical surface and the outer circle. A set screw 24 is installed on one side of the clamping body 2 to limit the expansion sleeve 4 and prevent the expansion sleeve 4 from loosening and tightening itself.

[0039] The working principle of the present utility model is as follows: The shaft rod of the workpiece 5 is inserted into the clamping hole 21, and the center point 6 abuts against the lower end of the workpiece 5. After the oil pressure space 33 is filled with oil, the pressure is transmitted to the piston 3, giving the piston 3 a downward pulling force, which drives the expansion sleeve 4 to pull downwards. The expansion sleeve 4 and the clamping body 2 are guided to pull downwards through the outer circle cooperation, and the expansion sleeve 4 is pulled down and tightened through the taper cooperation to clamp and fix the workpiece 5, facilitating the subsequent processing of the workpiece 5; when the oil pressure space 33 is drained of oil, the pressure is relieved, and the piston 3 is pushed up by the springs 13 distributed on the base cylinder block 1 and is sequentially transmitted to the expansion sleeve 4, and the workpiece 5 is loosened, completing the quick disassembly and assembly of the workpiece 5. The center point 6 and the expansion sleeve 4 in this device are detachably installed and can be quickly replaced according to different long shaft products to improve the versatility of the device.

[0040] The base cylinder block 1 is fixedly installed on the grinding machine workbench by bolts to ensure the positioning and self-rotation center of the fixture; the coaxiality between the expansion sleeve 4 and the clamping body 2 is ensured by the cooperation of the conical surface and the outer circle, and is limited by the set screw to prevent the expansion sleeve 4 from loosening and tightening itself; the piston 3 drives the expansion sleeve 4 to lift and adjust to clamp or loosen the workpiece 5. The bottom of the workpiece 5 abuts against the center point 6, and the depth of the workpiece 5 inserted into the clamping hole 21 can be adjusted by replacing the center point 6 to adjust the clamping position of the expansion sleeve 4.

[0041] This device solves the problems of high investment in the development of new energy products and poor versatility of fixtures, and can realize the quick replacement and processing of grinding teeth for long shaft gear products, saving the development investment cost.

[0042] The above has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all these changes and improvements fall within the scope of the present utility model claimed. The scope of protection claimed for the present utility model is defined by the appended claims and their equivalents. It should be noted that in this text, if there are relational terms such as first and second, etc., they are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the said element.

Claims

1. A quick-change fixture for long-axis gear worm gear grinding, characterized in that: include: A base cylinder body, which is fixedly mounted on a gear grinding machine workbench by bolts; A clamping body, which is fixedly mounted on the upper end of the base cylinder body by bolts, and a clamping hole is provided at the axis of the clamping body, and the clamping hole is a stepped hole structure; A piston, which is movably mounted at the bottom of the clamp hole, wherein the upper end of the piston is sealed and connected to the inner wall of the clamp body through a first sealing ring, and the outer wall of the lower end of the piston is sealed and connected to the inner wall of the clamp body through a second sealing ring, and an oil pressure space is formed between the piston and the inner wall of the clamp body through the first sealing ring and the second sealing ring to control the movement of the piston; The expansion sleeve is built into the clamping hole and can be detachably installed on the upper end of the piston to be driven up and down by the piston. The inner cavity wall of the clamp body and the outer circle of the expansion sleeve are fitted to ensure that the expansion sleeve and the clamp body are coaxial. The inner cavity wall of the clamp body and the expansion sleeve are matched through a taper to clamp the workpiece inserted into the expansion sleeve when the expansion sleeve descends.

2. The quick-change fixture for long-shaft gear worm gear grinding according to claim 1, characterized in that: A column is provided at the upper end of the base cylinder body, and the column is inserted into the clamping hole. A first cylindrical pin is embedded and installed at the corresponding position of the lower end of the piston, and the first cylindrical pin is slidably inserted into the pin hole corresponding to the base cylinder body. A second cylindrical pin is embedded and installed at the corresponding position of the upper end of the piston, and the second cylindrical pin is slidably inserted into the pin hole corresponding to the inner wall of the clamp.

3. The quick-change fixture for long-shaft gear worm gear grinding according to claim 2, characterized in that: The base cylinder body is provided with a first oil hole connected to the external oil supply device, the clamp body is provided with a second oil hole connected to the first oil hole, the second oil hole is communicated with the oil pressure space, and a sealing gasket is provided at the connection between the first oil hole and the second oil hole.

4. The quick-change fixture for long-shaft gear worm gear grinding according to claim 1, characterized in that: The upper end of the base cylinder body is provided with a plurality of bullet holes distributed in an annular manner corresponding to the piston, and a spring is installed in the bullet hole, and the upper end of the spring is abutted against the lower end of the piston.

5. The quick-change fixture for long-shaft gear worm gear grinding according to claim 1, characterized in that: A center point is installed at the upper end of the axis center of the base cylinder body. The center point and the base cylinder body are fixed by Morse taper cooperation. The center point is used to position the bottom of the workpiece.

6. The quick-change fixture for long-shaft gear worm gear grinding according to claim 4, characterized in that: The lower end of the expansion sleeve is inserted into the center hole of the piston and is fixedly connected to the piston thread. The upper end of the expansion sleeve is tilted outward and expanded. A plurality of vertical clamping holes are distributed in a ring at the upper end of the expansion sleeve to facilitate the contraction and clamping of the expansion sleeve. The upper end of the clamp body is provided with a conical surface corresponding to the expansion sleeve to cooperate with it. The expansion sleeve and the clamp body are matched through the conical surface and the outer circle to ensure coaxiality. A set screw is installed on one side of the clamp body to limit the expansion sleeve.

Images