Gear ring finish turning pitch circle alignment tool

Abstract

The utility model relates to the technical field of gear centering devices, in particular to a gear ring finish turning pitch circle alignment tool which comprises a bottom plate and a self-centering mechanism fixed to the bottom plate. The self-centering mechanism comprises a moving seat movably connected to the bottom plate and a plurality of jacking assemblies fixedly connected to the bottom plate, and the jacking assemblies are evenly distributed on the outer ring of the moving seat. The jacking assembly comprises a driving assembly and a supporting assembly which are fixed to the bottom plate, and a jacking rod connected to the supporting assembly in a sliding mode. The driving assembly comprises a second support connected to the bottom plate through a screw and a driving rod pivoted to the second support, the driving rod comprises a connecting rod and a cam fixed to the end of the connecting rod, the cam is pivoted to the second support, and the end, away from the cam, of the connecting rod is pivoted to the moving seat. The end, away from the supporting assembly, of the ejector rod abuts against the outer circle face of the cam. The tool can improve the positioning stability and accuracy of the gear ring, so that the turning precision of the gear ring is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gear centering devices, in particular to a gear ring fine turning pitch circle alignment tool. Background Art

[0002] The inner gear ring refers to the gear with the gear set on the inner ring. For large inner gear rings, in the process of turning the external dimensions, it is necessary to find the pitch circle during positioning and clamping, so that the pitch circle center of the inner gear ring is as consistent as possible with the rotation center of the lathe spindle, so that the tooth surface machining allowance is more uniform during the subsequent gear grinding process, which is beneficial to improve the gear grinding efficiency and processing quality.

[0003] For the positioning and alignment tooling of the internal gear ring, a centering mechanism is usually set on the positioning plate of the tooling to achieve the centering and alignment of the gear ring. For example, in the prior art "A centering and fastening method and fixture for internal spline gear grinding" (CN112170985A), the centering mechanism adopts the form of rotating cam to drive roller to press against the tooth groove surface to achieve the centering and fixing of the gear. However, the prior art still has the following technical problems:

[0004] When the clamp in the prior art is in use, the cam needs to be rotated, and the roller is gradually pressed into the tooth groove by relying on the eccentric arc surface set on the outer periphery of the cam, so as to achieve the function of positioning the gear ring; and since a gap must be left between the tooth groove and the cam to facilitate the movement of the roller, when the cam rotates, the roller is prone to tilt or misalignment due to the squeezing pressure of the eccentric arc surface or the action of external force, and the ball cannot be accurately inserted into the tooth groove, or a single ball is inserted into the misplaced tooth groove, resulting in that all the balls cannot be evenly distributed in the tooth groove in the circumferential direction, resulting in inaccurate positioning and alignment of the pitch circle of the gear ring, resulting in unqualified quality of the gear ring after processing. Utility Model Content

[0005] The utility model provides a gear ring fine turning pitch circle alignment tool, which can solve the problem that the clamp in the prior art easily leads to inaccurate positioning and alignment of the gear ring, resulting in unqualified quality of the gear ring after processing.

[0006] The present application provides the following technical solutions: a gear ring fine turning pitch circle alignment tool, comprising a base plate and a self-centering mechanism fixed to the base plate;

[0007] The self-centering mechanism comprises a moving seat movably connected to the bottom plate and a pressing assembly fixedly connected to the bottom plate, wherein a plurality of pressing assemblies are provided and evenly distributed on the outer ring of the moving seat;

[0008] The pressing assembly includes a driving assembly and a supporting assembly respectively fixed on the base plate, and a push rod slidably connected to the supporting assembly; the driving assembly includes a second support threadedly connected to the base plate and a driving rod pivotally connected to the second support, the driving rod includes a connecting rod and a cam fixed to the end of the connecting rod, the cam is pivotally connected to the second support, the end of the connecting rod away from the cam is pivotally connected to the moving seat, the moving seat can move up and down in the vertical direction on the base plate, the end of the push rod close to the supporting assembly is the contact end with the inner tooth surface of the gear ring, and the end of the push rod away from the supporting assembly is tightly pressed against the outer cylindrical surface of the cam.

[0009] Beneficial effects:

[0010] The movable seat can move up and down relative to the base plate, so that the cam on the driving rod rotates around the pivot point on the second support, and the outer cylindrical surface of the cam at one end of the push rod is pressed tightly. When the cam rotates, its outer cylindrical surface can push the push rod, causing the push rod to slide relative to the support assembly. When multiple push rods are simultaneously pressed toward the outer periphery in the radial direction, the end of the push rod away from the cam can gradually press against the tooth groove surface of the gear ring, thereby achieving the purpose of positioning and aligning the pitch circle of the gear ring. Since the push rods are slidably connected to the support assembly and are evenly distributed along the outer circumference of the movable seat, when the multiple push rods are subjected to the extrusion force of the cam, they will only press against the tooth groove surface along the radial direction of the gear ring, thereby avoiding the situation where a single push rod is misplaced and pushed into the tooth groove. All push rods are in a uniform distribution state when they are pushed into the tooth groove, so that the force on the gear ring is more even, which improves the stability and accuracy of positioning, thereby effectively improving the accuracy of gear ring machining.

[0011] Furthermore, the pivot point between the cam and the second support is eccentrically arranged.

[0012] Beneficial effect: By eccentrically setting the pivot point, when the cam rotates, the outer cylindrical surface of the cam can gradually increase the pushing pressure on the push rod, so as to achieve the purpose of driving the push rod to slide in the radial direction.

[0013] Furthermore, the support assembly includes a T-shaped block fixed on the bottom plate and a positioning seat screwed to the T-shaped block, and the push rod is slidably connected to the positioning seat.

[0014] Beneficial effect: The support assembly is used to support the push rod, so as to facilitate the push rod to slide along the radial direction of the gear ring.

[0015] Further: the rod portion of the push rod is provided with a step, and the rod portion of the push rod between the step and the positioning seat is sleeved with a compression spring.

[0016] Beneficial effect: The rod of the push rod is sleeved with a compression spring, so that when the movable seat is reset, the push rod is automatically reset by relying on the elastic force of the compression spring.

[0017] Furthermore, the movable seat includes an adjusting screw threadedly connected to the base plate, a pressure plate and a support plate fixedly connected to the adjusting screw from top to bottom, and a first support fixed to the support plate. The first support is provided in plurality and evenly distributed on the support plate, and the end of the connecting rod away from the cam is pivotally connected to the first support.

[0018] Beneficial effect: By turning the adjusting screw, the support plate and the first support can be driven to move up and down relative to the base plate, so that the connecting rod can rotate radially around the pivot point on the first support, so as to drive the cam at the other end of the connecting rod to rotate.

[0019] Furthermore, a protrusion is provided at the lower end of the rod portion of the adjusting screw, and the support plate is clamped between the pressure plate and the protrusion.

[0020] Beneficial effect: The protrusions provided on the adjusting screw facilitate the support plate to be supported and fixed, so that when the adjusting screw is turned, the support plate can move up and down accordingly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an axonometric view of the utility model.

[0022] Figure 2 for Figure 1 Axonometric view of the moving seat.

[0023] Figure 3 It is a top view of the utility model.

[0024] Figure 4 for Figure 3 Sectional view of AA. DETAILED DESCRIPTION

[0025] The following is further described in detail through specific implementation methods:

[0026] The marks in the drawings of the specification include: base plate 1, adjusting screw 2, second support 3, positioning seat 4, T-block 5, inner gear ring 6, push rod 7, compression spring 8, cam 9, connecting rod 10, first support 11, pressure plate 12, and support plate 13.

[0027] Embodiment 1

[0028] like Figures 1 to 4 As shown, a gear ring fine turning pitch circle alignment tool includes a base plate 1 and a self-centering mechanism fixed on the base plate 1. The self-centering mechanism includes a movable seat movably connected to the base plate 1 and a top pressing assembly fixedly connected to the base plate 1. There are multiple top pressing assemblies evenly distributed on the outer ring of the movable seat.

[0029] Mobile base includes Figure 4The adjusting screw 2 is connected to the bottom plate 1 with a middle thread, the pressing plate 12 and the supporting plate 13 are fixedly connected to the adjusting screw 2 from top to bottom, and the first support 11 is fixed to the supporting plate 13 with a screw, the upper end of the adjusting screw 2 is in the shape of a hexagonal head; the lower end of the adjusting screw 2 is provided with an external thread, which can be threadedly connected to the center of the bottom plate 1, the lower end of the rod of the adjusting screw 2 is provided with a protrusion, and the bottom plate 1 is provided with a groove, which has a guiding effect on the protrusion, and the protrusion can slide up and down in the groove, and the supporting plate 13 is clamped between the pressing plate 12 and the protrusion, and radial through holes are opened on the pressing plate 12 and the adjusting screw 2, and the two can be fixed together by inserting a pin into the through hole; Figure 2 As shown, a plurality of first supports 11 are provided and are evenly distributed on the support plate 13 of the outer circle of the pressure plate 12 .

[0030] The pressing assembly comprises a driving assembly and a supporting assembly respectively fixed on the bottom plate 1 by screws, and a push rod 7 slidably connected to the supporting assembly.

[0031] like Figure 1 and Figure 4 As shown, the driving assembly includes a second support 3 connected to the base plate 1 by screws and a driving rod pivoted on the second support 3, the driving rod includes an integrally formed connecting rod 10 and a cam 9, the cam 9 is fixed to one end of the connecting rod 10, and the end of the connecting rod 10 away from the cam 9 is pivoted to the first support 11, the cam 9 is pivoted to the second support 3 and the pivot point is close to the direction of the adjusting screw 2 and slightly below.

[0032] The support assembly includes a T-block 5 fixed on the bottom plate 1 and a positioning seat 4 connected to the T-block 5 by screws. A T-slot is radially opened on the bottom plate 1, and the T-block 5 is located in the T-slot. Figure 4 As shown, the T-block 5 is provided with a vertical threaded hole, and the positioning seat 4 is provided with a countersunk hole. Screws are inserted into the countersunk hole and the threaded hole of the T-block 5 from top to bottom in sequence to fix the positioning seat 4. The positioning seat 4 is L-shaped, and a sliding hole is provided at the upper end of the positioning seat 4. The push rod 7 is slidably connected in the sliding hole of the positioning seat 4. The rod portion of the push rod 7 is provided with a step. The rod portion of the push rod 7 between the step and the positioning seat 4 is sleeved with a compression spring 8. The end of the push rod 7 away from the positioning seat 4 is against the outer cylindrical surface of the cam 9.

[0033] The usage of this tool is as follows:

[0034] like Figure 4As shown, the inner gear ring 6 is placed on the positioning seat 4 so that all the push rods 7 are located on the inner hole side of the inner gear ring 6, and the hexagonal head at the upper end of the adjusting screw 2 is turned with a wrench to raise the adjusting screw 2, thereby driving the support plate 13 and the first support 11 to move upward, and the end of the connecting rod 10 pivotally connected to the first support 11 is lifted upward, and the cam 9 is rotated around the pivot point between it and the second support 3, and the outer cylindrical surface of the cam 9 gradually pushes the push rod 7 so that all the push rods 7 are synchronously pushed into the tooth groove at one end away from the cam 9, completing the centering and alignment of the pitch circle of the inner gear ring 6, and subsequent processing can be carried out. If the inner gear ring 6 needs to be removed, the adjusting screw 2 is turned in the opposite direction to move the adjusting screw 2 downward, and the cam 9 rotates in the opposite direction driven by the connecting rod 10, and the push rod 7 is reset by the resilience of the compression spring 8, and the end of the push rod 7 away from the cam 9 is detached from the tooth groove, and the inner gear ring 6 can be removed.

[0035] 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 gear ring fine turning pitch circle alignment tool, comprising a base plate and a self-centering mechanism fixed on the base plate, characterized in that: The self-centering mechanism comprises a moving seat movably connected to the bottom plate and a pressing assembly fixedly connected to the bottom plate, wherein a plurality of pressing assemblies are provided and evenly distributed on the outer ring of the moving seat; The pressing assembly includes a driving assembly and a supporting assembly respectively fixed on the base plate, and a push rod slidably connected to the supporting assembly; the driving assembly includes a second support threadedly connected to the base plate and a driving rod pivotally connected to the second support, the driving rod includes a connecting rod and a cam fixed to the end of the connecting rod, the cam is pivotally connected to the second support, the end of the connecting rod away from the cam is pivotally connected to the moving seat, the moving seat can move up and down in the vertical direction on the base plate, the end of the push rod close to the supporting assembly is the contact end with the inner tooth surface of the gear ring, and the end of the push rod away from the supporting assembly is tightly pressed against the outer circular surface of the cam.

2. A gear ring fine turning pitch circle alignment tool according to claim 1, characterized in that: The pivot point between the cam and the second support is eccentrically arranged.

3. The gear ring fine turning pitch circle alignment tool according to claim 2, characterized in that: The support assembly comprises a T-shaped block fixed on the bottom plate and a positioning seat connected to the T-shaped block by screws, and the push rod is slidably connected to the positioning seat.

4. The gear ring fine turning pitch circle alignment tool according to claim 3, characterized in that: The rod portion of the push rod is provided with a step, and the rod portion of the push rod between the step and the positioning seat is sleeved with a compression spring.

5. The gear ring fine turning pitch circle alignment tool according to claim 4, characterized in that: The movable seat includes an adjusting screw threadedly connected to the base plate, a pressure plate and a support plate fixedly connected to the adjusting screw from top to bottom, and a first support fixed to the support plate. The first support is provided in plurality and evenly distributed on the support plate. The end of the connecting rod away from the cam is pivotally connected to the first support.

6. A gear ring fine turning pitch circle alignment tool according to claim 5, characterized in that: The lower end of the rod portion of the adjusting screw is provided with a protrusion, and the supporting plate is clamped between the pressing plate and the protrusion.

Images