Off-line detection tool for sun gear

Abstract

The utility model relates to the technical field of gear detection, in particular to a sun gear off-line detection tool which comprises a tool body and a leveling device, the tool body comprises a bottom plate, a cross-shaped protruding block fixedly connected with the bottom plate and a supporting rod detachably connected with the cross-shaped protruding block, the cross-shaped protruding block divides the bottom plate into four equal areas, and the leveling device is arranged on the bottom plate. Four sets of leveling devices are arranged and are respectively distributed in one of the areas; the leveling device comprises a base, an adjusting nut and an ejector rod which are sequentially arranged from bottom to top, during use, the sun gear is firstly placed on the end face of the cross-shaped protruding block, then the ejector rod can move up and down by rotating the adjusting nut, and the sun gear is directly aligned; according to the scheme, the technical problem that in the preparation period of off-line detection of the sun gear, the process of double-top clamping of the sun gear cannot depend on single-person operation can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of gear detection, in particular to an off-line detection tool for a sun gear. Background Art

[0002] When grinding gears, the first thing that needs to be tested is offline. That is, the gear is removed from the gear grinding machine and placed on a special gear inspection instrument for inspection. The gear grinding program of the gear grinding machine is adjusted according to the generated offline inspection accuracy report until the offline inspection report shows that it is qualified. This process is of great significance to ensure that gears of qualified quality are processed.

[0003] In a planetary gear system, the outer gear that serves as the central gear is called the sun gear. The structure of the sun gear is as follows: Figure 1 As shown in the figure, the sun gear body 11 and the center hole 12 set in the center of the sun gear body are generally used in the prior art to clamp a long workpiece such as the sun gear 1. Figure 1 The double-top clamping method shown in the figure takes the use of a gear tester to perform off-line inspection on the sun gear 1 as an example. The purpose of the double-top clamping is to use two centers to directly align the sun gear 1 to ensure the quality of the off-line inspection. The specific process of the double-top clamping is to first fix a set of tooling bodies for fixing the bottom of the sun gear on the workbench of the gear tester, and a lower center 2a is fixed on the top of the tooling body. An upper center 2b opposite to the lower center 2a is installed on the top of the gear tester. The upper center 2b is used to fix the top of the sun gear 1, and the position of the lower center 2a is fixed, but the upper center 2b needs to be manually shaken to control the lifting and lowering of the upper center 2b. The upper center 2b and the lower center 2a are respectively inserted and fixed at the top and bottom positions of the center hole 12 to complete the double-top clamping of the sun gear 1.

[0004] However, the problem with the prior art is that, during the process of double-top clamping the sun gear 1, the operator is required to hold the sun gear 1 on the lower center 2a steady while shaking the hand wheel to lower the upper center 2b, and at the same time keep a close eye on whether the center hole 12 is aligned with the upper center 2b or the lower center 2a. If a single person operates it, it is easy to be overwhelmed and the operation safety is poor. If additional personnel are assigned to operate it, the labor cost will increase. Utility Model Content

[0005] The utility model provides a sun gear offline detection tool, which can solve the technical problem that during the preparation period for offline detection of the sun gear, the process of double-top clamping the sun gear cannot be operated by a single person.

[0006] This application provides the following technical solutions:

[0007] A sun gear offline detection tool, comprising a tool body and a leveling device, the tool body comprising a bottom plate, a cross-shaped protrusion fixedly connected to the bottom plate, and a support rod detachably connected to the cross-shaped protrusion, the cross-shaped protrusion divides the bottom plate into four equally divided areas, and a total of four sets of the leveling device are arranged and each is distributed in one of the areas; the leveling device comprises a base, an adjusting nut, and a push rod arranged in sequence from bottom to top, the base is slidably connected to the bottom plate, a step hole is arranged at the center of the base, the push rod comprises a threaded section and a smooth rod section, the threaded section is threadedly connected to the adjusting nut, and the smooth rod section is slidably connected to the step hole, the leveling device also comprises a transversely arranged pin for limiting the rotation of the push rod, the pin is fixedly connected to the smooth rod section, a key slot connected to the step hole is arranged next to the step hole, and the pin is slidably connected to the key slot.

[0008] Beneficial effects:

[0009] 1. The double-top clamping method used in the prior art mainly utilizes the characteristics of high positioning accuracy and no need for alignment of the double-top clamping method. However, the clamping process is not convenient enough and is difficult to operate by one person. This solution provides an alternative method of directly aligning the sun wheel by using a leveling device to lift the sun wheel and using an auxiliary tool, a dial indicator. Because only the first piece needs to be tested offline, the double-top clamping method is not as efficient as directly aligning the sun wheel, and can be operated by one person.

[0010] 2. The leveling device is distributed in four equally divided areas divided by the cross-shaped protrusions, so that the operator can level the sun gear from various directions at the bottom. The specific process of leveling is to rotate the adjusting nut. Since the bottom of the adjusting nut is blocked by the base and cannot move in the vertical direction, it can only rotate in the original position close to the top surface of the base. The adjusting nut will drive the push rod to move upward when it rotates, and the push rod will lift the bottom of the sun gear when it moves upward. Since the pin of the light rod section is stuck in the keyway, the push rod can only move up and down but not rotate. In the process of lifting the sun gear, it can effectively prevent the end face of the sun gear from being damaged due to friction, and avoid affecting the surface quality of the sun gear.

[0011] Furthermore, as an improvement, it also includes a lifting ring for lifting the tooling body, a threaded hole is set at the center of the cross-shaped protrusion, and the support rod and the lifting ring can be threadedly connected to the threaded hole.

[0012] Beneficial effect: The addition of the lifting ring is conducive to the mobile installation of the tooling body, saving manpower. The lifting ring is set to be able to replace the support rod and the threaded hole for threaded connection, rather than setting a separate installation hole for installing the lifting ring, making the overall structure of the tooling body more concise.

[0013] Further, as an improvement, a limiting groove extending to the side wall of the bottom plate is provided on the bottom plate, and the base comprises an outer circular section and a square section which are fixedly connected, and the square section and the limiting groove are slidably connected.

[0014] Beneficial effects: The limiting groove extends to the side wall of the bottom plate to facilitate the installation of the square section on the base, and the detachable sliding connection relationship formed makes the overall structure simple and easy to install and maintain.

[0015] Further, as an improvement, the step hole includes a sliding hole and a countersink which are sequentially arranged from bottom to top and are slidably connected to the polished rod segment, and the diameter of the sliding hole is smaller than the diameter of the countersink.

[0016] Beneficial effect: Due to the diameter difference between the sliding hole and the countersunk hole, a stepped hole is formed. The sliding hole is slidably connected with the polished rod section to cooperate with the upward and downward translation of the push rod. In addition to making way for the downward movement of the threaded section, the countersunk hole can also limit the downward movement position of the push rod.

[0017] Further, as an improvement, a rotation hole for rotating the adjusting nut is transversely arranged on the adjusting nut.

[0018] Beneficial effect: The function of the rotating rod is to cooperate with the auxiliary tool long rod to manually rotate the adjusting nut, so as to complete the up and down movement of the ejector rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of a double top clamping sun gear in the prior art;

[0020] Figure 2 This is an axonometric view of a first embodiment of a sun gear offline detection tooling of the utility model;

[0021] Figure 3 for Figure 2 A cross-sectional view of the middle leveling device;

[0022] Figure 4 for Figure 2 Exploded view of the middle leveling device;

[0023] Figure 5 For the corresponding Figure 1 Isometric view of the sun gear when placed. DETAILED DESCRIPTION

[0024] The following is further described in detail through specific implementation methods:

[0025] The marks in the drawings in the specification include: sun gear 1, sun gear body 11, center hole 12, lower center pin 2a, upper center pin 2b, bottom plate 3, limiting groove 31, cross-shaped protrusion 4, threaded hole 41, leveling device 5, base 51, outer circular section 511, square section 512, sliding hole 513, countersunk hole 514, keyway 515, adjusting nut 52, rotating hole 521, top rod 53, threaded section 531, bare rod section 532, pin 54, support rod 6.

[0026] Embodiment 1

[0027] Combination Figure 2-Figure 5 As shown, a sun gear offline detection tool includes a tool body and a leveling device 5. The tool body includes a base plate 3, a cross-shaped protrusion 4 integrally formed with the base plate 3, and a support rod 6 threadedly connected to the cross-shaped protrusion 4. Except for the part threadedly connected to the cross-shaped protrusion 4, the support rod 6 is a bare rod. The cross-shaped protrusion 4 divides the base plate 3 into four equally divided areas. A total of four sets of leveling devices 5 are arranged and each is distributed in one of the areas.

[0028] The bottom plate 3 is a disc-shaped structure, with four limiting grooves 31 equally divided around the bottom plate 3, and one end of the limiting groove 31 away from the center of the bottom plate 3 extends all the way to the side wall of the bottom plate 3; the center of the cross-shaped protrusion 4 is cylindrical and a threaded hole 41 is arranged on its surface, and the four long sides on the cross-shaped protrusion 4 are staggered with the four limiting grooves 31 and extend outward to the side wall of the bottom plate 3, that is, the position of the outer circle.

[0029] The leveling device 5 includes a base 51, an adjusting nut 52, and a push rod 53 which are arranged in sequence from bottom to top. The base 51 includes an outer circular section 511 and a square section 512 which are integrally formed. The square section 512 is a rectangular parallelepiped structure and is slidably connected to the limiting groove 31. The outer circular section 511 is a cylindrical structure and can be snapped onto the top surface of the bottom plate 3. A step hole which passes through the outer circular section 511 and the square section 512 is arranged at the center of the base 51. The step hole includes a sliding hole 513 and a countersunk hole 514 which are arranged in sequence from bottom to top and are slidably connected to the light rod section 532. The sliding hole 513 is a through hole and its diameter is smaller than that of the countersunk hole 514. The push rod 53 includes a threaded section 531 and a light rod section 532. The threaded section 53 1 is threadedly connected with the adjusting nut 52, the polished rod section 532 is slidably connected with the sliding hole 513, the diameter of the countersunk hole 514 is larger than the diameter of the threaded section 531, the leveling device 5 also includes a transversely arranged pin 54 for limiting the rotation of the top rod 53, a through hole is transversely arranged in the polished rod section 532, the pin 54 can be inserted into the polished rod section 532 to achieve a fixed connection, a keyway 515 connected with the step hole is arranged next to the step hole, the keyway 515 also penetrates the outer circle section 511 and the square section 512, one end of the pin 54 protruding from the polished rod section 532 is slidably connected with the keyway 515, and four rotation holes 521 for assisting the rotation of the adjusting nut 52 are transversely arranged on the outer circle of the adjusting nut 52.

[0030] It also includes a lifting ring for lifting the tool body, and the lifting ring can be threadedly connected with the threaded hole 41 after the support rod 6 is removed.

[0031] The actual application to the offline detection process of the sun gear 1 mainly includes the following steps:

[0032] Step 1: Install a lifting ring in the threaded hole 41, use a crane or other lifting equipment to lift the tool body to the workbench of the tooth inspection instrument, and fix it with an auxiliary tool press;

[0033] Step 2: Replace the lifting ring with the support rod 6, and lift the sun gear 1 to be tested offline to the top surface of the cross-shaped protrusion 4 for placement;

[0034] Step 3: Use a dial indicator to align a reference outer circle during gear grinding, and check the runout of the other outer circle. If it meets the requirements, use a tooth inspection instrument to perform offline accuracy testing. If it does not meet the requirements, perform leveling according to the meter reading until it passes. The specific leveling process is as follows:

[0035] S1: Insert a long rod of an auxiliary tool into the rotating hole 521 to rotate the adjusting nut 52 in the forward direction. Since the bottom of the adjusting nut 52 is blocked by the base 51, it cannot move in the vertical direction and can only rotate in the original position close to the top surface of the base 51. When the adjusting nut 52 rotates, it will drive the push rod 53 to move upward. When the push rod 53 moves upward, it will lift up the sun gear 1 placed on the top surface of the cross-shaped protrusion 4. The pin 54 on the light rod section 532 is stuck in the keyway 515, so that the push rod 53 can only move upward and cannot rotate. In the process of lifting the sun gear 1, it can effectively prevent the end face of the sun gear 1 from being damaged due to friction, thereby affecting the surface quality of the sun gear 1.

[0036] S2: Use the auxiliary tool long rod to rotate the adjusting nut 52 in the opposite direction, and the adjusting nut 52 moves upward along the threaded section 531 of the top rod 53. Once a gap appears between the adjusting nut 52 and the base 51, the adjusting nut 52 will fall on the top surface of the base 51 under the action of gravity, that is, the adjusting nut is reset, driving the top rod 53 to move downward.

[0037] 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 sun gear offline detection tool, comprising a tool body and a leveling device, characterized in that: The tool body comprises a bottom plate, a cross-shaped protrusion fixedly connected to the bottom plate, and a support rod detachably connected to the cross-shaped protrusion, wherein the cross-shaped protrusion divides the bottom plate into four equally divided areas, and a total of four sets of the leveling devices are provided and each is distributed in one of the areas; The leveling device includes a base, an adjusting nut, and a push rod which are arranged in sequence from bottom to top. The base is slidably connected to the bottom plate, and a step hole is arranged at the center of the base. The push rod includes a threaded section and a smooth rod section. The threaded section is threadedly connected to the adjusting nut, and the smooth rod section is slidably connected to the step hole. The leveling device also includes a transversely arranged pin for limiting the rotation of the push rod, and the pin is fixedly connected to the smooth rod section. A key slot connected to the step hole is arranged next to the step hole, and the pin is slidably connected to the key slot.

2. The sun gear offline detection tool according to claim 1, characterized in that: It also includes a lifting ring for lifting the tooling body, a threaded hole is arranged at the center of the cross-shaped protrusion, and the support rod and the lifting ring can be threadedly connected to the threaded hole.

3. The sun gear offline detection tooling according to claim 2, characterized in that: A limiting groove extending to the side wall of the bottom plate is arranged on the bottom plate, and the base comprises an outer circular section and a square section which are fixedly connected, and the square section and the limiting groove are slidably connected.

4. The sun gear offline detection tooling according to claim 3 is characterized by: The step hole comprises a sliding hole and a countersink which are sequentially arranged from bottom to top and are slidably connected to the polished rod segment, and the diameter of the sliding hole is smaller than the diameter of the countersink.

5. The sun gear offline detection tooling according to claim 4, characterized in that: A rotating hole for rotating the adjusting nut is arranged transversely on the adjusting nut.

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