Tool for measuring groove pitch of snap spring groove

Abstract

The utility model provides a clamp spring groove pitch measuring tool comprising a positioning pedestal, the positioning pedestal is provided with a positioning hole, the inner wall of the positioning hole is provided with a spline, the diameter of the positioning hole is the same as the diameter of the root part of the involute spline, and the positioning hole is provided with an avoiding gap with an upward opening; the measuring module comprises a measuring meter, the measuring meter is arranged on the positioning base, the measuring meter comprises a dial plate and a measuring pressure head connected with the dial plate, a measuring base plate is rotationally arranged on the measuring pressure head, and the measuring base plate is located above the avoiding notch; based on the compression and extension movement of the measuring pressure head along the axial direction, the dial plate can display different readings. The clamp spring groove pitch measuring tool can realize accurate measurement of the distance from the root of the involute spline to the position of the clamp spring groove, improves the detection accuracy, is simple in structure and convenient to operate, and can also greatly improve the detection efficiency.

Description

Technical Field

[0001] The utility model relates to a measuring tool, in particular to a measuring tool for a circlip groove pitch, which is used for measuring the distance between the root of an involute spline on a constant velocity universal joint transmission shaft and the edge of a circlip groove. Background Art

[0002] In the machining process of constant velocity joint drive shafts, an involute spline connection is the most common assembly method. To ensure satisfactory post-assembly performance, a circlip groove is also machined into the CVJ drive shaft to ensure stability and safety during use. Since the location of the circlip groove directly affects the performance of the CVJ drive shaft after assembly, its placement is crucial.

[0003] At present, when performing dimensional inspection on the position of the retaining ring groove on the constant velocity universal joint drive shaft, the root of the involute spline is usually used as the measurement and positioning reference, and then a vernier caliper is used to measure the distance from the root of the involute spline to one side of the retaining ring groove to see if it meets the dimensional requirements. However, since this traditional measurement method makes it difficult to accurately locate the root of the involute spline, the inspection efficiency is low and the inspection results are inaccurate. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a measuring tool for the groove pitch of a retaining ring groove, which is used to measure the distance between the root of the involute spline on the constant velocity universal joint transmission shaft and the edge of the retaining ring groove, so as to solve the problems of low detection efficiency and inaccurate detection results in the traditional measurement method in the prior art.

[0005] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a measuring tool for the groove pitch of a retaining ring groove, which is used to measure the distance between the root of the involute spline on the constant velocity universal joint transmission shaft and the edge of the retaining ring groove, the measuring tool comprising a positioning base, a positioning hole is provided on the positioning base, a spline is provided on the inner wall of the positioning hole, the diameter of the positioning hole is the same as the diameter of the root of the involute spline, and an avoidance notch with an opening facing upward is provided on the positioning hole; a measuring module, the measuring module comprising a measuring meter, the measuring meter is arranged on the positioning base, the measuring meter comprises a dial and a measuring pressure head connected to the dial, a measuring substrate is rotatably provided on the measuring pressure head, and the measuring substrate is located above the avoidance notch; based on the compression and extension movement of the measuring pressure head along its axial direction, the dial can display different readings.

[0006] Preferably, the measuring module also includes a connecting sleeve, which is fixedly connected to the positioning base, and a connecting hole is provided inside the connecting sleeve that passes through along its axial direction; the measuring pressure head includes an external fixed cylinder connected to the dial, an internal telescopic rod movably arranged in the external fixed cylinder, and a movable connecting rod movably arranged in the connecting hole, the movable connecting rod can rotate relative to the connecting sleeve, and can move relative to the connecting sleeve along the axial direction of the connecting sleeve, wherein the external fixed cylinder is fixedly connected to the connecting hole, the internal telescopic rod is transmission-connected to the pointer on the dial, the first end of the movable connecting rod is in conflict with the internal telescopic rod, and a compression spring is provided on the internal telescopic rod, one end of the compression spring is in contact with the external fixed cylinder, and the other end of the compression spring is in contact with the first end of the movable connecting rod, and the measuring substrate is arranged with the second end of the movable connecting rod.

[0007] Preferably, the measuring substrate is connected to the second end portion of the movable connecting rod via a fastening screw.

[0008] Preferably, a fixing hole and a first locking threaded hole are provided on the positioning base, wherein the axial direction of the first locking threaded hole is perpendicular to the axial direction of the fixing hole, and the first locking threaded hole is communicated with the fixing hole, and a first locking screw is provided in the first locking threaded hole; a fixing portion is provided on the connecting sleeve, and the fixing portion is embedded in the fixing hole, and the first locking screw is used to lock the fixing portion.

[0009] Preferably, a second locking threaded hole is provided on the connecting sleeve, the second locking threaded hole extends along the radial direction of the connecting sleeve, and the second locking threaded hole is connected to the connecting hole, and a second locking screw is provided in the second locking threaded hole, and the second locking screw is used to lock the external fixing tube.

[0010] Preferably, the first end of the movable connecting rod is provided with a limiting flange, the connecting hole includes a first hole segment and a second hole segment, the diameter of the first hole segment is smaller than the diameter of the second hole end, and a positioning surface is formed at the connection between the first hole segment and the second hole segment. The first end of the movable connecting rod is movably inserted into the first hole segment and extends into the second hole segment, and the diameter of the limiting flange is larger than the diameter of the first hole segment.

[0011] Preferably, a limit pin is provided on the positioning base, and the limit pin is used to limit the rotation angle of the measuring substrate.

[0012] As described above, the measuring tool for the groove pitch of the retaining ring of the present invention has the following beneficial effects: through the measuring tool for the groove pitch of the retaining ring of the present invention, the accurate measurement of the distance from the root of the involute spline to the position of the retaining ring groove can be achieved, thereby improving the accuracy of detection. In addition, the structure is simple and the operation is convenient, which can also greatly improve the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Shown is a schematic structural diagram of a measuring tool for the groove pitch of a retaining ring provided by the present invention.

[0014] Figure 2 Shown is a side view of the positioning base provided by the present invention.

[0015] Figure 3 Shown is a front view of the positioning base provided by the utility model.

[0016] Figure 4 Shown is a schematic structural diagram of the connecting sleeve provided by the present utility model.

[0017] Figure 5 Shown is a schematic structural diagram of the movable connecting rod provided by the utility model.

[0018] Figure 6 Shown is a schematic structural diagram of the proofreading block provided by the present invention.

[0019] Description of Reference Numerals

[0020] 10 Positioning base

[0021] 101 positioning hole

[0022] 102 fixing holes

[0023] 103 First locking threaded hole

[0024] 104 First locking screw

[0025] 105 limit pin

[0026] 20 measurement modules

[0027] 21 Measuring table

[0028] 211 dial

[0029] 212 Measuring head

[0030] 2121 External fixing cylinder

[0031] 2122 Internal telescopic rod

[0032] 2123 movable connecting rod

[0033] 2124 Compression Spring

[0034] 2123a Limiting flange

[0035] 22 Connecting sleeve

[0036] 220 connection hole

[0037] 2201 First hole section

[0038] 2202 Second hole section

[0039] 221 Fixed part

[0040] 222 Second locking threaded hole

[0041] 223 Second locking screw

[0042] 23 Measuring substrate

[0043] 231 Fastening screw

[0044] 100 proofreading blocks DETAILED DESCRIPTION

[0045] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention.

[0046] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, direct connections, connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0047] In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. used in the present invention to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0048] See also Figures 1 to 6 It should be noted that the illustrations provided in this embodiment are merely schematic illustrations of the basic concept of the present invention. Therefore, the illustrations only show components relevant to the present invention and are not drawn according to the number, shape, and size of components in actual implementation. In actual implementation, the type, quantity, and proportion of each component may be arbitrarily changed, and the component layout may also be more complex.

[0049] The utility model provides a measuring tool for the groove distance of a circlip groove, which is used to measure the distance between the root of the involute spline on the transmission shaft of the constant velocity universal joint and the edge of the circlip groove. Figures 1 to 3 As shown, the measuring tool includes a positioning base 10 and a measuring module 20, wherein the positioning base 10 is provided with a positioning hole 101, the inner wall of the positioning hole 101 is provided with a spline, the diameter of the positioning hole 101 is the same as the diameter of the root of the involute spline on the constant velocity universal joint transmission shaft, and the positioning hole 101 is provided with an upward-opening avoidance notch (not shown in the figure), the measuring module 20 includes a measuring gauge 21, which is arranged on the positioning base 10, specifically, the measuring gauge 21 includes a dial 211 and a measuring pressure head 212 connected to the dial 211, a measuring substrate 23 is rotatably provided on the measuring pressure head 212, and the measuring substrate 23 is located above the avoidance notch on the positioning base, based on the compression and extension movement of the measuring pressure head 212 along its axial direction (i.e., the axial direction of the measuring pressure head), the dial 211 can display different readings.

[0050] The beneficial effects of the clamping spring slot distance measuring tool of the present invention are as follows: when in use, the measuring tool is first calibrated by a calibration block 100, such as Figure 6 As shown, the structure of the calibration block 100 is the same as the external dimensions of the constant velocity joint transmission shaft. Figure 6The A dimension on the calibration block 100 is the standard dimension from the root of the involute spline to the edge of the retaining ring groove. By inserting the calibration block 100 into the positioning hole 101 on the positioning base 10, since the diameter of the positioning hole 101 is the same as the diameter of the root of the involute spline, when the calibration block 100 (or the constant velocity universal joint transmission shaft) is inserted into the positioning hole 101, the calibration block 100 (or the constant velocity universal joint transmission shaft) can only be inserted to the position of the root of the involute spline, that is, the positioning hole 101 is The edge of the hole will collide with the root of the involute spline to locate the insertion distance of the calibration block 100 (or the constant velocity universal joint transmission shaft). Since the positioning hole 101 is provided with an upward-opening avoidance notch (not shown in the figure), by compressing the measuring pressure head 212 of the measuring gauge 21 and rotating the measuring substrate 23, the measuring substrate 23 is pressed against the groove edge of the retaining spring groove. At this time, the reading displayed on the dial 211 is the required standard size from the root of the involute spline to the groove edge of the retaining spring groove, and then the reading on the dial is adjusted. Set to "zero". When testing the constant velocity joint drive shaft later, the constant velocity joint drive shaft is also inserted into the positioning hole 101. The spline on the inner wall of the positioning hole will match the involute spline of the constant velocity joint drive shaft. The edge of the positioning hole 101 will conflict with the root of the involute spline to locate the insertion distance of the constant velocity joint drive shaft. If the distance between the root of the involute spline of the constant velocity joint drive shaft and the edge of the circlip groove is shorter than the standard size A on the calibration block, the test The measuring head 212 will extend outward a certain distance relative to the calibration block during calibration, and the dial 211 will have a positive (negative) deviation reading. If the distance between the root of the involute spline of the constant velocity universal joint transmission shaft and the edge of the retaining ring groove is longer than the standard dimension A on the calibration block, the measuring head 212 will be compressed inward a certain distance relative to the calibration block during calibration, and the dial will have a negative (positive) deviation reading. If the measured positive and negative deviation readings are within a reasonable range, the constant velocity universal joint transmission shaft is judged to be a qualified product. Therefore, the retaining ring groove distance measuring fixture of the present invention can achieve accurate measurement of the distance from the root of the involute spline to the retaining ring groove position, improving the accuracy of detection. In addition, the simple structure and easy operation can also greatly improve detection efficiency.

[0051] Preferably, Figure 1 and Figure 4As shown, in this embodiment, the measuring module 20 also includes a connecting sleeve 22, which is fixedly connected to the positioning base 10, and a connecting hole 220 is provided in the connecting sleeve 22 that passes through along its axial direction. Specifically, the measuring pressure head 212 includes an external fixed cylinder 2121, an internal telescopic rod 2122 and a movable connecting rod 2123, wherein the external fixed cylinder 2121 is connected to the dial 211, and the external fixed cylinder 2121 is also fixedly connected to the connecting hole 220, the internal telescopic rod 2122 is movably arranged in the external fixed cylinder 2121, and the internal telescopic rod 2122 is also connected to the pointer on the dial 211. Dynamic connection, the movable connecting rod 2123 is movably arranged in the connecting hole 220 of the connecting sleeve 22. The movable connecting rod 2123 can rotate relative to the connecting sleeve 22, and can also move relative to the connecting sleeve 22 along the axial direction of the connecting sleeve 22. The first end of the movable connecting rod 2123 conflicts with the internal telescopic rod 2122, and a compression spring 2124 is sleeved on the internal telescopic rod 2122. One end of the compression spring 2124 contacts the external fixed tube 2121, and the other end of the compression spring 2124 contacts the first end of the movable connecting rod 2123. The measuring substrate 23 is arranged on the second end of the movable connecting rod 2123. With this structural design, during testing, the movable connecting rod 2123 is compressed and rotated, causing the measuring base plate 23 on the movable connecting rod 2123 to abut against the edge of the retaining spring slot. Because the first end of the movable connecting rod 2123 contacts the internal telescopic rod 2122, which is in driving connection with the pointer on the dial 211, the pointer on the dial 211 rotates to different angles depending on the degree of compression of the movable connecting rod 2123, thereby displaying different readings. This simple structure makes it easy to operate.

[0052] Preferably, in order to prevent the movable connecting rod 2123 from jumping out of the connecting hole 220, preferably, as Figure 4 and Figure 5 As shown, in this embodiment, a limiting flange 2123a is provided at the first end of the movable connecting rod 2123. Accordingly, the connecting hole 220 includes a first hole section 2201 and a second hole section 2202. The diameter of the first hole section 2201 is smaller than the diameter of the second hole section 2202. The connection between the first and second hole sections 2202 forms a positioning surface. The first end of the movable connecting rod 2123 is movably inserted into the first hole section 2201 and extends into the second hole section 2202. The diameter of the limiting flange 2123a is larger than the diameter of the first hole section 2201. Through this structural design, since the diameter of the limiting flange 2123a at the first end of the movable connecting rod 2123 is larger than the diameter of the first hole section 2201, the positioning surface formed at the connection between the first and second hole sections 2201, 2202, can limit the limiting flange 2123a and prevent the movable connecting rod from slipping out of the connecting hole 220.

[0053] Specifically, such as Figure 1 As shown, in this embodiment, the measuring substrate 23 is connected to the end of the second end of the movable connecting rod 2123 through a fastening screw 231.

[0054] Specifically, such as Figure 1 、 Figure 3 and Figure 4 As shown, the positioning base 10 is provided with a fixing hole 102 and a first locking threaded hole 103, wherein the axial direction of the first locking threaded hole 103 is perpendicular to the axial direction of the fixing hole 102, and the first locking threaded hole 103 and the fixing hole 102 are connected, and a first locking screw 104 is provided in the first locking threaded hole 103. Correspondingly, the connecting sleeve 22 is provided with a fixing portion 221, which is embedded in the fixing hole 102, and the first locking screw 104 is used to lock the fixing portion 221. That is, through this structural design, by tightening the first locking screw 104, the first locking screw 104 presses against the fixing portion 221, thereby achieving the fixing of the connecting sleeve 22 relative to the positioning base 10. The structure is simple and easy to assemble and disassemble.

[0055] Specifically, such as Figure 1 and Figure 4 As shown, in this embodiment, the connecting sleeve 22 is provided with a second locking threaded hole 222. The second locking threaded hole 222 extends in the radial direction of the connecting sleeve 22 and intersects with the connecting hole 220. A second locking screw 223 is provided in the second locking threaded hole 222. The second locking screw 223 is used to lock the external fixing cylinder 2121 of the measuring meter 21. When the measuring meter 21 is fixed, the second locking screw 223 is tightened so that the second locking screw 223 presses against the external fixing cylinder 2121, thereby achieving a fixed connection between the measuring meter 21 and the connecting sleeve 22.

[0056] Preferably, Figure 1 As shown, a limit pin 105 is also provided on the positioning base 10. This limit pin 105 is used to limit the rotation angle of the measurement base 23. Specifically, when not measuring, the measurement base 23 is in a horizontal position, so that it does not interfere with the insertion of the measurement base 23 into the axial positioning hole 101 of the constant velocity joint transmission axis. When measurement is required, the measurement base 23 is rotated 90° to a vertical position, so that the downward end of the measurement base 23 can be inserted into the retaining spring groove and abut against one edge of the retaining spring groove.

[0057] In summary, the present invention's circlip groove distance measurement tool can accurately measure the distance from the root of an involute spline to the circlip groove, improving detection accuracy. Its simple structure and convenient operation significantly enhance detection efficiency. Therefore, the present invention effectively overcomes the shortcomings of existing technologies and possesses high industrial value.

[0058] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A measuring tool for the groove pitch of a circlip groove, used to measure the distance between the root of the involute spline on the transmission shaft of a constant velocity universal joint and the edge of the circlip groove, characterized in that: The measuring tool comprises: A positioning base, wherein the positioning base is provided with a positioning hole, the inner wall of the positioning hole is provided with a spline, the diameter of the positioning hole is the same as the diameter of the root of the involute spline, and the positioning hole is provided with an upward-opening avoidance notch; The measuring module includes a measuring meter, which is arranged on the positioning base. The measuring meter includes a dial and a measuring pressure head connected to the dial. A measuring substrate is rotatably provided on the measuring pressure head, and the measuring substrate is located above the avoidance gap; based on the compression and extension movement of the measuring pressure head along its axial direction, the dial can display different readings.

2. The measuring tool for the groove pitch of a retaining ring according to claim 1, characterized in that: The measuring module also includes a connecting sleeve, which is fixedly connected to the positioning base, and a connecting hole is provided inside the connecting sleeve that passes through along its axial direction; the measuring pressure head includes an external fixed cylinder connected to the dial, an internal telescopic rod movably arranged in the external fixed cylinder, and a movable connecting rod movably arranged in the connecting hole, the movable connecting rod can rotate relative to the connecting sleeve, and can move relative to the connecting sleeve along the axial direction of the connecting sleeve, wherein the external fixed cylinder is fixedly connected to the connecting hole, the internal telescopic rod is transmission-connected to the pointer on the dial, the first end of the movable connecting rod conflicts with the internal telescopic rod, and a compression spring is sleeved on the internal telescopic rod, one end of the compression spring contacts the external fixed cylinder, and the other end of the compression spring contacts the first end of the movable connecting rod, and the measuring substrate is arranged on the second end of the movable connecting rod.

3. The measuring tool for the groove pitch of a retaining ring according to claim 2, characterized in that: The measuring substrate is connected to the second end portion of the movable connecting rod through a fastening screw.

4. The measuring tool for the groove pitch of a retaining ring according to claim 2, characterized in that: The positioning base is provided with a fixing hole and a first locking threaded hole, wherein the axial direction of the first locking threaded hole is perpendicular to the axial direction of the fixing hole, and the first locking threaded hole is connected to the fixing hole, and a first locking screw is provided in the first locking threaded hole; the connecting sleeve is provided with a fixing portion, the fixing portion is embedded in the fixing hole, and the first locking screw is used to lock the fixing portion.

5. The measuring tool for the groove pitch of a retaining ring according to claim 2, characterized in that: A second locking threaded hole is provided on the connecting sleeve, and the second locking threaded hole extends along the radial direction of the connecting sleeve. The second locking threaded hole is connected to the connecting hole, and a second locking screw is provided in the second locking threaded hole. The second locking screw is used to lock the external fixing tube.

6. The measuring tool for the groove pitch of a retaining ring according to claim 2, characterized in that: The first end of the movable connecting rod is provided with a limiting flange, and the connecting hole includes a first hole segment and a second hole segment. The diameter of the first hole segment is smaller than the diameter of the second hole end, and a positioning surface is formed at the connection between the first hole segment and the second hole segment. The first end of the movable connecting rod is movably inserted into the first hole segment and extends into the second hole segment, and the diameter of the limiting flange is larger than the diameter of the first hole segment.

7. The measuring tool for the groove pitch of a retaining ring according to claim 1, characterized in that: The positioning base is provided with a limit pin, and the limit pin is used to limit the rotation angle of the measuring substrate.

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