Forming Gear Grinding Tensioner

Abstract

The utility model discloses a forming gear grinding tensioning tool, comprising a vertebral body, an expansion sleeve sleeved on the vertebral body for tensioning a gear, and a nut screwed on the vertebral body for pressing against the expansion sleeve, wherein an elastic compression portion is arranged on the vertebral body, and the elastic compression portion is used to be triggered to lock the expansion sleeve when the expansion sleeve is tightly sleeved on the vertebral body. By arranging the elastic compression portion on the vertebral body, the gear can be pressed against and fixed after being sleeved on the vertebral body and squeezed into the expansion sleeve. During the installation of the expansion sleeve, the expansion sleeve triggers the elastic compression portion after being installed in place so that the elastic compression portion locks the expansion sleeve and the vertebral body and presses against the gear, thereby preventing the expansion sleeve and the gear from sliding after being installed in place, and the nut further presses against the expansion sleeve so that the expansion sleeve fixes the gear, thereby ensuring the progress of the gear grinding process.

Description

Technical Field

[0001] The utility model relates to the field of mechanical gear processing, in particular to a forming gear grinding and tightening tool. Background Art

[0002] In the field of mechanical gear processing, gear processing has strict process requirements. Gear grinding is the most important process for gears. The process of grinding the gear teeth using a gear grinding machine is called gear grinding. The gear is fixed with a tensioning fixture and then the grinding wheel is used as a grinding tool to process the tooth surface of cylindrical gears or some gear processing tools.

[0003] The existing tensioning tooling is composed of a cone, an expansion sleeve and a nut. The gear sleeve is set on the cone and tightened and fixed by the expansion sleeve, so as to avoid the need to make different mandrels when fixing different inner hole gears, thereby reducing costs and improving efficiency. However, the fixing of the gear is completely dependent on the tightening of the expansion sleeve. Before the nut is fixed to the cone to resist the expansion sleeve, the expansion sleeve may still slide relative to the cone and the gear, which may cause the gear to loosen and affect the gear grinding process. Utility Model Content

[0004] 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 forming gear grinding tensioning tool to solve the problem of possible looseness between the expansion sleeve and the vertebral body.

[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a forming gear grinding tensioning tool including a vertebral body, an expansion sleeve mounted on the vertebral body for tensioning the gear, and a nut threaded on the vertebral body for tightening the expansion sleeve, the vertebral body is provided with an elastic compression part, the elastic compression part is used to be triggered when the expansion sleeve is tightly mounted on the vertebral body to lock the expansion sleeve and the vertebral body, so as to prevent the expansion sleeve from sliding relative to the vertebral body and the gear before the nut is installed and affecting the fixing effect of the gear, thereby ensuring that the gear grinding process can proceed normally.

[0006] Furthermore, the vertebral body includes a seat body, a truncated cone-shaped conical section whose wide end is integrally connected to the seat body, and a threaded section integrally connected to the narrow end of the conical section. The seat body, conical section and threaded section are all coaxially distributed, the elastic compression portion is arranged on the conical section and the expansion sleeve is tightly sleeved on the conical section to limit the movement of the expansion sleeve, and the nut is threadedly arranged on the threaded section.

[0007] Furthermore, the seat body and the threaded section are both provided with a top groove on the opposite ends thereof, and a top is inserted into one of them for positioning.

[0008] Furthermore, the seat body extends radially around the circumference of the tapered section toward a side away from the tapered section to form a step surface for abutting against the gear, so as to limit the degree of freedom of the gear in the axial direction.

[0009] Furthermore, the elastic compression portion includes a trigger portion and a locking portion respectively formed on the conical section, and one of the trigger portion and the locking portion extends out of the conical section, so that after the expansion sleeve is tightly sleeved on the conical section, the trigger portion is triggered to allow the locking portion to lock the expansion sleeve, and even lock the gear.

[0010] Furthermore, the trigger portion includes a first active cavity opened on the conical section, an extrusion block sealingly and slidingly arranged in the first active cavity along the radial direction of the conical section, and a first spring arranged in the first active cavity along the sliding direction of the extrusion block. The first active cavity has a first opening that passes through the conical section along the radial direction of the conical section. One end of the extrusion block passes out of the first opening and the first spring is in a normal state. The first spring is respectively connected to the extrusion block and the side of the first active cavity away from the first opening, so that the extrusion block extends out of the first opening in the initial state. When the expansion sleeve is set on the conical section, the extrusion block will be squeezed to trigger the locking portion so that it can position the expansion sleeve.

[0011] Furthermore, the extrusion block includes a limiting section connected to the first spring and a protruding section protruding from the limiting section toward the first opening on the side facing away from the first spring. The protruding section has a smooth spherical surface and passes through the first opening when the first spring is in a normal state, thereby facilitating the expansion sleeve to squeeze the protruding section and trigger the locking part to position the expansion sleeve.

[0012] Furthermore, a positioning hole is provided on the expansion sleeve along the radial direction of the tapered section; the locking portion includes a second active cavity provided on the tapered section and aligned with the positioning hole when the expansion sleeve is arranged on the tapered section, a pin rod sealingly and slidingly arranged in the second active cavity along the radial direction of the tapered section, and a second spring arranged in the second active cavity along the sliding direction of the pin rod. One end of the second active cavity has a second opening that passes through the tapered section along the radial direction of the tapered section, and the other end is connected to the first active cavity through a channel. One end of the pin rod can pass through the second opening when the extrusion block is squeezed and slides into the first active cavity. The second spring changes from a normal state to a stretched state after the pin rod passes through the second opening. The second spring is respectively connected to the pin rod and a side of the second active cavity away from the second opening, so as to trigger the pin rod to pass into the positioning hole to limit the movement of the expansion sleeve after the extrusion block is squeezed by the expansion sleeve.

[0013] Furthermore, a slide groove is provided on the outer wall of the conical section along its axial direction, and a convex rib is provided on the inner wall of the expansion sleeve at a position corresponding to the slide groove. The convex rib slides through the slide groove, thereby ensuring that the second active cavity can be aligned with the perforation after the expansion sleeve is installed.

[0014] Furthermore, the elastic compression portion also includes a sealed exhaust portion connected to the second active cavity, and the exhaust portion is used to ventilate the second active cavity so that when the expansion sleeve needs to be removed, the pressure can be released and the second spring can rebound and contract, thereby driving the pin rod to contract and exit the positioning hole.

[0015] The forming gear grinding tensioning tool of the utility model has at least the following beneficial effects: by arranging an elastic compression part on the vertebral body, the gear can be pressed and fixed after being sleeved on the vertebral body and squeezed into the expansion sleeve; during the installation of the expansion sleeve, the expansion sleeve triggers the elastic compression part after being installed in place so that the elastic compression part locks the expansion sleeve and the vertebral body and presses against the gear, thereby preventing the expansion sleeve and the gear from sliding after being installed in place; the nut further presses against the expansion sleeve so that the expansion sleeve fixes the gear, thereby ensuring the progress of the gear grinding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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:

[0017] Figure 1 It is a cross-sectional view of the forming gear grinding and tightening tooling of the utility model;

[0018] Figure 2 for Figure 1 An exploded cross-sectional view of the forming gear grinding tensioning tooling shown;

[0019] Figure 3 for Figure 2 Magnified view of part A shown.

[0020] The meanings of the symbols in the accompanying drawings are:

[0021] Vertebra 1; seat body 11; conical section 12; slide groove 121; channel 122; threaded section 13; step surface 14; top groove 15; expansion sleeve 2; positioning hole 21; convex rib 22; nut 3; elastic compression part 4; trigger part 41; first active cavity 411; extrusion block 412; limiting section 4121; protruding section 4122; first spring 413; first opening 414; locking part 42; second active cavity 421; pin rod 422; second spring 423. DETAILED DESCRIPTION

[0022] The utility model will be further described below in conjunction with the accompanying drawings.

[0023] like Figures 1 to 3As shown, the forming gear grinding and tightening tool of the utility model comprises a vertebral body 1, an expansion sleeve 2 for tightening the gear mounted on the vertebral body 1, a nut 3 threaded on the vertebral body 1 for pressing against the expansion sleeve 2, and an elastic compression portion 4 arranged on the vertebral body 1. The gear to be subjected to gear grinding is movably mounted on the vertebral body 1, the expansion sleeve 2 is mounted on the vertebral body 1 and tensionedly penetrated into the inner hole of the gear, and the elastic compression portion 4 is triggered by the extrusion of the expansion sleeve 2 after the expansion sleeve 2 penetrates and is tensioned in the inner hole of the gear, thereby locking the position between the expansion sleeve 2, the vertebral body 1 and the gear, thereby preventing the vertebral body 1, the expansion sleeve 2 and the gear from slipping, or preventing the expansion sleeve 2 and the vertebral body 1 from slipping, thereby positioning the position between the expansion sleeve 2, the vertebral body 1 and the gear, and the nut 3 is threaded on the vertebral body 1 after the elastic compression portion 4 positions the gear until the nut 3 presses against the expansion sleeve 2.

[0024] In this embodiment, the vertebral body 1 includes a seat body 11, a truncated cone-shaped conical section 12 with one end integrally connected to the seat body 11, and a threaded section 13 integrally connected to the other end of the conical section 12, the elastic compression portion 4 is arranged on the conical section 12 and the expansion sleeve 2 is tightly sleeved on the conical section 12, so that the expansion sleeve 2 can be gradually tightened on the conical section 12 and tighten the gear, and the nut 3 is screwed on the threaded section 13. The seat body 11, the conical section 12 and the threaded section 13 are all coaxial and distributed in sequence, and the seat body 11, the conical section 12 and the threaded section 13 are integrally formed to ensure basic rigidity and strength. In the content defined in this embodiment, the seat body 11 is a cylindrical structure, and can also be a geometric three-dimensional structure such as a cube. The seat body 11 extends radially around the circumference of the tapered section 12 toward the side away from the tapered section 12, so that the diameter of the seat body 11 is larger than the diameter of the tapered section 12 and a step surface 14 for supporting the gear is formed relative to the tapered section 12. The step surface 14 can make the gear press against the step surface 14 during the process of the expansion sleeve 2 being inserted and tightened in the inner hole of the gear, so as to support the gear and ensure that the expansion sleeve 2 can gradually press against the gear and the cone until the gear is tightened. The conical section 12 is truncated and has a wide end and a narrow end. The wide end of the conical section 12 is connected to the seat body 11, and the narrow end of the conical section 12 is connected to the threaded section 13. When the expansion sleeve 2 is sleeved thereon and penetrated into the inner hole of the gear, the conical section 12 moves from one end of the threaded section 13 toward one end of the seat body 11, so that it is gradually tightened by the conical section 12 and the gear is tightened in the opposite direction, thereby pressing the gear and the conical section 12. In particular, when used to fix gears with different inner hole sizes, the conical section 12 and the expansion sleeve 2 can be used to press against the inner hole, so that it can be used to fix gears of different sizes, and the scope of use is wider. In the content defined in this embodiment, the seat body 11 and the threaded section 13 are both provided with a top groove 15 on the end surface opposite to each other, and the top groove 15 is consistent with the outer contour of the external top tip, so that the external top tip can be inserted into it to position the vertebral body 1. The outer diameter of the threaded section 13 is less than or equal to the diameter of the narrow end of the tapered section 12, and the diameter of the threaded section 13 is smaller than the diameter of the inner hole of the expansion sleeve 2, so that the threaded section 13 does not affect the fit between the expansion sleeve 2 and the tapered section 12. An external thread is provided on the outer wall of the threaded section 13. In this embodiment, the nut 3 has a screw hole adapted to the threaded section 13, so that the nut 3 can be threadedly sleeved on the threaded section 13. In this embodiment, a positioning hole 21 penetrating the expansion sleeve 2 is provided on the expansion sleeve 2 along the radial direction of the tapered section 12, so that the elastic compression part 4 can lock the expansion sleeve 2 through the positioning hole 21. The structure of the expansion sleeve 2 is an existing common expansion sleeve 2 structure, which is a prior art, and can refer to any expansion sleeve 2 structure, and will not be repeated here. It should be noted that a plurality of positioning holes 21 can be provided, and each positioning hole 21 is evenly spaced or adjacently distributed along the axial direction of the vertebral body 1, so that it can be used to fix gears with different inner hole diameters corresponding to different positioning holes 21.In the content defined in this embodiment, in order to ensure that the positioning hole 21 can correspond to the elastic compression part 4 when the expansion sleeve 2 is sleeved on the tapered section 12, a slide groove 121 is provided on the outer wall of the tapered section 12 from one end close to the threaded section 13 toward one section of the seat body 11, and both ends of the slide groove 121 are set through along the axial direction of the vertebral body 1, and a convex rib 22 is convexly provided on the inner wall of the expansion sleeve 2 at a position corresponding to the slide groove 121, and the length direction of the convex rib 22 is parallel to the slide groove 121, and the convex rib 22 is slidably penetrated in the slide groove 121. At the beginning of the installation of the expansion sleeve 2, the convex rib 22 is first aligned with the slide groove 121 and slidably penetrated in the slide groove 121, so that the positioning hole 21 of the expansion sleeve 2 is aligned with the elastic compression part 4 when the gear is tightened.

[0025] In this embodiment, the elastic compression portion 4 includes a trigger portion 41, a locking portion 42 and a vent portion (not shown in the figure) respectively formed on the conical section 12. One of the trigger portion 41 and the locking portion 42 extends out of the conical section 12. When the trigger portion 41 extends out of the conical section 12, the locking portion 42 retracts into the conical section 12. At this time, the expansion sleeve 2 is not restricted by the elastic compression portion 4 and can move freely or tighten relative to the vertebral body 1; when the locking portion 42 extends out of the conical section 12, the trigger portion 41 extends out of the conical section 12, and the locking portion 42 retracts into the conical section 12. The triggering portion 41 is squeezed by the expansion sleeve 2 and retracted into the conical section 12. At this time, the locking portion 42 is inserted into the positioning hole 21 of the expansion sleeve 2, which not only limits the movement of the expansion sleeve 2 relative to the cone along its axial direction, but also limits the rotation of the expansion sleeve 2 in the circumferential direction to prevent the expansion sleeve 2 from slipping and affecting the gear grinding process. The exhaust portion is used to ventilate the triggering portion 41 and the locking portion 42 when disassembling the expansion sleeve 2 and the gear, so that the triggering portion 41 and the locking portion 42 can be reset, thereby no longer locking the expansion sleeve 2.

[0026] In this embodiment, the trigger part 41 includes a first active cavity 411 opened on the conical section 12, an extrusion block 412 sealed and slidably arranged in the first active cavity 411 along the radial direction of the conical section 12, and a first spring 413 arranged in the first active cavity 411 along the sliding direction of the extrusion block 412. The extrusion block 412 can not only slide in the first active cavity 411 along the sliding direction, but also be sealed in the first active cavity 411 to form a sealed cavity with the first active cavity 411, so that the gas in the first active cavity 411 can be squeezed when the extrusion block 412 moves, so that the gas in the first active cavity 411 can enable the locking part 42 to lock the expansion sleeve 2 and the vertebral body 1 when needed, and at the same time press against or penetrate into the gear to further lock the gear. The first spring 413 is in a contracted state when the extrusion block 412 is pressed by the expansion sleeve 2. When the locking part 42 no longer locks the expansion sleeve 2, the first spring 413 rebounds and stretches to push the extrusion block 412 to reset, so as to be used to fix the next gear. In the content defined in this embodiment, the first active cavity 411 is a cylindrical cavity structure, and the axial direction of the first active cavity 411 is opened and formed along the radial direction of the location of the tapered section 12. The first active cavity 411 has one end facing the axis of the tapered section 12 and one end away from the axis. The end of the first active cavity 411 away from the axis has a first opening 414 that penetrates the tapered section 12 along the radial direction of the tapered section 12 toward the side away from the axis, so that one end of the extrusion block 412 can pass through the first opening 414. When one end of the extrusion block 412 passes through the first opening 414, the first spring 413 is in a normal state or a compressed state. It should be noted that even if the first spring 413 is in a compressed state at this time, it is only slightly compressed rather than extremely compressed, so as to ensure the subsequent use of the first spring 413. When the extrusion block 412 is squeezed by the expansion sleeve 2, it is squeezed into the first active cavity 411. At this time, the first spring 413 is in a compressed state and presses against the first active cavity 411 and the extrusion block 412. The gas in the first active cavity 411 is squeezed and moves toward the locking portion 42, thereby driving the locking portion 42 to lock the expansion sleeve 2. In the content defined in this embodiment, the first opening 414 is circular and extends inwardly in the radial direction so that the diameter of the first opening 414 is smaller than the diameter of the first active cavity 411 and is in a closed shape. The extrusion block 412 includes a limiting section 4121 connected to the first spring 413 and a protruding section 4122 protruding from the limiting section 4121 on the side facing away from the first spring 413 and toward the side of the first opening 414. The limiting section 4121 is sealed and slidably arranged in the first active cavity 411 along the axial direction of the first active cavity 411. The sealed sliding can be achieved by referring to the cooperation between the piston and the syringe of the syringe, that is, the limiting section 4121 is made of rubber or other materials, and the inner wall of the first active cavity 411 is kept smooth.The protruding section 4122 is fixedly connected to the limiting section 4121 and has a hemispherical structure. The diameter of the protruding section 4122 is less than or equal to the diameter of the first opening 414 so that it can move through the first opening 414. The protruding section 4122 has a smooth spherical surface and passes through the first opening 414 when the first spring 413 is in a normal state. The limiting section 4121 abuts against the edge of the closed first opening 414 to prevent the entire extrusion block 412 from completely escaping from the first active cavity 411 and being difficult to retract. The spherical surface can make the expansion sleeve 2 press the protruding section 4122 toward the first active cavity 411 so that the extrusion block 412 shrinks in the first active cavity 411. In the content defined in this embodiment, the first spring 413 is a compression spring and its two ends are respectively connected to the extrusion block 412 and the side of the first active cavity 411 away from the first opening 414 so that it can be used to push or pull the extrusion block 412. It should be noted that the sliding direction of the extrusion block 412 is the axial direction of the first active cavity 411.

[0027] In the content defined in this embodiment, the locking portion 42 includes a second active cavity 421 which is opened on the conical section 12 and is aligned with the positioning hole 21 when the expansion sleeve 2 is sleeved on the conical section 12, a pin rod 422 which is sealingly and slidably arranged in the second active cavity 421 along the radial direction of the conical section 12, and a second spring 423 which is arranged in the second active cavity 421 along the sliding direction of the pin rod 422. The second active cavity 421 is used to accommodate the pin rod 422. When the extrusion block 412 is squeezed to push the gas in the first active cavity 411, the squeezed gas is pushed out of the second active cavity 421, so that the pin rod 422 is inserted into the positioning hole 21 after the expansion sleeve 2 is in place, limiting the freedom between the expansion sleeve 2, the vertebral body 1 and the gear or between the expansion sleeve 2 and the vertebral body 1 in the axial direction or the circumferential direction, thereby preventing the expansion sleeve 2 from slipping and affecting the fixing effect of the gear. When in use, the second spring 423 is in a normal state when the extrusion block 412 is not squeezed. At this time, the pin 422 is located in the second active chamber 421. When the extrusion block 412 is squeezed by the expansion sleeve 2 and pushes the gas in the first active chamber 411, the pushed gas is connected to the second active chamber 421 and pushes the pin 422 to move until the positioning hole 21 is aligned with the second active chamber 421 and the pin 422 penetrates into the positioning hole 21. At this time, the second spring 423 is in a stretched state; when the gear grinding is completed and the gear needs to be removed, the first active chamber 411 and the second active chamber 421 are connected to the outside through the exhaust part, and the pin 422 is no longer squeezed, the second spring 423 rebounds and contracts, and the first spring 413 rebounds and extends. The pin 422 is pulled back by the second spring 423 as the second spring 423 rebounds and contracts until it exits the positioning hole 21. At this time, the gear and the expansion sleeve 2 can be disassembled normally. The second active cavity 421 is cylindrical in structure, and the axial direction of the second active cavity 421 is consistent with the radial direction of the position of the conical section 12 where the second active cavity 421 is located. After the expansion sleeve 2 is installed in place, the positioning hole 21 is directly opposite to and coaxially corresponds to the second active cavity 421. The second active cavity 421 has one end close to the axis of the conical section 12 and the other end away from the axis of the conical section 12. The end of the second active cavity 421 away from the axis of the conical section 12 has a second opening that penetrates the conical section 12 along the radial direction of the conical section 12 toward the side away from the axis. The end of the second active cavity 421 close to the axis of the conical section 12 is connected to the end of the first active cavity 411 close to the axis of the conical section 12 through a channel 122, so that the extrusion block 412 squeezes the gas in the first active cavity 411 while squeezing the second active cavity 421. The pin rod 422 has a cylindrical structure and is arranged coaxially with the second active cavity 421. The length of the pin rod 422 is greater than the length of the positioning hole 21. If a slot corresponding to the pin rod 422 and the positioning hole 21 is provided on the gear, the length of the pin rod 422 is greater than the sum of the lengths of the positioning hole 21 and the slot, so that one end of the pin rod 422 can always be located in the second active cavity 421.The end of the pin 422 away from the axis of the conical section 12 can pass through the second opening and extend into the positioning hole 21 and the slot when the extrusion block 412 is squeezed and slides into the first active cavity 411, thereby locking the expansion sleeve 2, the vertebral body 1 and the gear. The end of the pin 422 close to the conical section 12 can be set with a limiting portion consistent with the limiting section 4121, and the corresponding second opening also needs to be set to a closed shape. The limiting portion is made of rubber or other materials to enable the limiting portion to slide in a sealed manner with the second active cavity 421; the limiting portion may not be set, and the end of the limiting portion close to the axis is set to a cone shape and the diameter is adapted to the second active cavity 421 to achieve sealed sliding. It should be noted that the pin 422 and the extrusion block 412 are both made of hard materials. The second spring 423 is a tension spring and the axial direction is distributed along the axial direction of the second active cavity 421. The two ends of the second spring 423 are respectively connected to the end of the pin 422 close to the axis and the end of the second active cavity 421 close to the axis. The second spring 423 is in an initial state and a normal state when the extrusion block 412 is not squeezed. When the extrusion block 412 is squeezed and pushes the gas in the first active chamber 411 and the second active chamber 421, the gas pushes one end of the pin rod 422 out of the second opening, and the second spring 423 is changed from a normal state to a stretched state. In the process of making the second spring 423 rebound from the stretched state to the normal state through the exhaust part, the second spring 423 pulls the pin rod 422 to slide toward the second active chamber 421 until the pin rod 422 exits the positioning hole 21.

[0028] The exhaust portion is connected to one end of the second active cavity 421 close to the axis, so that the second active cavity 421 can be connected to the outside to exhaust and inhale air when it needs to be reset, so that the first spring 413 and the second spring 423 can be reset. Specifically, the exhaust portion includes an exhaust cavity (not shown in the figure) formed on the vertebral body 1 and a blocking portion detachably blocked on the exhaust cavity. One end of the exhaust cavity is connected to the second active cavity 421, and the other end of the exhaust cavity is connected to the outside of the vertebral body 1. The blocking portion blocks the end of the exhaust cavity away from the second active cavity 421. The blocking portion can be a sealing plug made of rubber or a cylindrical sealing plug made of other hard materials. The outer wall of the sealing plug is provided with an external thread, and the inner wall of the end of the exhaust cavity away from the second active cavity 421 is provided with an internal thread matching the sealing plug thread, so as to block the exhaust cavity by threaded connection.

[0029] The working method of one embodiment of the forming gear grinding and tightening tool of the utility model is as follows: the trigger part 41 and the locking part 42 are both in the initial state, the gear sleeve that needs to be ground is set on the tapered section 12, and the inner hole of the gear is arranged at an interval between the tapered section 12, and then the expansion sleeve 2 is inserted and squeezed into the inner hole of the gear until the expansion sleeve 2 is pressed against the tapered section 12 and the gear. The expansion sleeve 2 presses the extrusion block 412 into the first active cavity 411 to squeeze the gas in the first active cavity 411 and the second active cavity 421 so that one end of the pin rod 422 is pushed out of the second active cavity 421 to penetrate into the corresponding positioning hole 21 and into the slot of the gear, thereby realizing the mutual positioning between the gear, the expansion sleeve 2 and the vertebral body 1 to prevent the expansion sleeve 2 from slipping, and finally the nut 3 is screwed on the threaded section 13, and the vertebral body 1 is driven to rotate using an external clamp to grind the gear.

Claims

1. A forming gear grinding tensioning tool, comprising a vertebral body, an expansion sleeve sleeved on the vertebral body for tensioning a gear, and a nut threaded on the vertebral body for tightening the expansion sleeve, characterized in that: The vertebral body is provided with an elastic compression part, and the elastic compression part is used to be triggered when the expansion sleeve is tightly sleeved on the vertebral body to lock the expansion sleeve and the vertebral body.

2. The forming gear grinding tensioning tool as claimed in claim 1, characterized in that: The vertebral body includes a seat body, a truncated cone-shaped conical section whose wide end is integrally connected to the seat body, and a threaded section integrally connected to the narrow end of the conical section. The seat body, the conical section and the threaded section are all coaxially distributed, the elastic compression portion is arranged on the conical section and the expansion sleeve is tightly sleeved on the conical section, and the nut is threadedly arranged on the threaded section.

3. The forming gear grinding tensioning tool as claimed in claim 2, characterized in that: The seat body and the threaded section are both provided with a top groove on their opposite ends.

4. The forming gear grinding tensioning tool as claimed in claim 2, characterized in that: The seat body extends around the circumference of the tapered section and in a radial direction toward a side away from the tapered section to form a step surface for abutting against the gear.

5. The forming gear grinding tensioning tool as claimed in claim 2, characterized in that: The elastic compression portion includes a trigger portion and a locking portion respectively formed on the tapered section, and one of the trigger portion and the locking portion extends out of the tapered section.

6. The forming gear grinding tensioning tool as claimed in claim 5, characterized in that: The trigger part includes a first active cavity opened on the conical section, an extrusion block sealed and slidably arranged in the first active cavity along the radial direction of the conical section, and a first spring arranged in the first active cavity along the sliding direction of the extrusion block. The first active cavity has a first opening that passes through the conical section along the radial direction of the conical section. One end of the extrusion block passes through the first opening and the first spring is in a normal state. The first spring is respectively connected to the extrusion block and the first active cavity on one side away from the first opening.

7. The forming gear grinding tensioning tool as claimed in claim 6, characterized in that: The extrusion block includes a limiting section connected to the first spring and a protruding section protruding from the limiting section on the side facing away from the first spring toward the first opening. The protruding section has a smooth spherical surface and passes through the first opening when the first spring is in a normal state.

8. The forming gear grinding tensioning tool as claimed in claim 7, characterized in that: A positioning hole is provided on the expansion sleeve along the radial direction of the tapered section; the locking portion includes a second active cavity provided on the tapered section and aligned with the positioning hole when the expansion sleeve is arranged on the tapered section, a pin rod sealingly and slidingly arranged in the second active cavity along the radial direction of the tapered section, and a second spring arranged in the second active cavity along the sliding direction of the pin rod. One end of the second active cavity has a second opening that passes through the tapered section along the radial direction of the tapered section, and the other end is connected to the first active cavity through a channel. One end of the pin rod can pass through the second opening when the extrusion block is squeezed and slides into the first active cavity. The second spring changes from a normal state to a stretched state after the pin rod passes through the second opening. The second spring is respectively connected to the pin rod and the side of the second active cavity away from the second opening.

9. The forming gear grinding tensioning tool as claimed in claim 8, characterized in that: A sliding groove is provided on the outer wall of the conical section along its axial direction, and a convex rib is provided on the inner wall of the expansion sleeve at a position corresponding to the sliding groove, and the convex rib is slidably arranged in the sliding groove.

10. The forming gear grinding tensioning tool as claimed in claim 9, characterized in that: The elastic compression part also includes a sealed exhaust part connected to the second active cavity, and the exhaust part is used to ventilate the second active cavity.

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