A gauge for detecting the runout amplitude of the inner cavity of a universal joint relative to the rod.

Abstract

This application relates to the field of universal joint testing, specifically to a gauge for detecting the runout amplitude of the universal joint's inner cavity relative to the rod. The gauge includes a base, a clamping assembly for clamping the workpiece to be tested, a testing assembly, and an operating mechanism. The clamping assembly includes at least two support seats and at least one clamping seat. The two support seats respectively support both ends of the workpiece to be tested. The clamping seat is located above the support seats and cooperates with them to limit the vertical degree of freedom of the workpiece to be tested. The testing assembly includes a dial indicator. The operating mechanism includes a first lifting assembly for moving the dial indicator vertically and a horizontal driving assembly for moving the dial indicator along the rod direction of the workpiece to be tested. The testing assembly extends into the inner cavity of the workpiece to be tested, directly testing the runout amplitude of the inner cavity relative to the rod when the workpiece rotates. There is no error caused by reference conversion, and the runout amplitude of the inner cavity relative to the rod can be accurately obtained.

Description

Technical Field

[0001] This application relates to the field of universal joint testing, and in particular to a gauge for detecting the runout amplitude of the universal joint cavity relative to the rod. Background Technology

[0002] The drive shaft assembly consists of a drive shaft and constant velocity joints on both sides of it. The inner constant velocity joint is connected to the transmission side. The inner constant velocity joint mainly uses a three-ball-pin type constant velocity joint that can perform axial displacement.

[0003] A three-ball pin constant velocity universal joint includes an inner connector with three journals, roller assemblies assembled on the journals, and an outer connector that houses the roller assemblies. The outer connector is also called a three-column groove housing. Figure 1 As shown. During the vehicle assembly process, the three-post housing is positioned by its rod, while the inner cavity of the three-post housing is subjected to force. Therefore, after processing, it is necessary to test the amplitude of the runout of the inner cavity of the three-post housing relative to its rod when the rod rotates, to ensure product quality and prevent the drive shaft assembly from jamming due to large runout of the inner cavity of the three-post housing relative to its rod.

[0004] Therefore, inventing a gauge for detecting the runout amplitude of the universal joint cavity relative to the rod is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In order to accurately obtain the runout amplitude of the inner cavity of the three-column groove relative to the rod, this application provides a gauge for detecting the runout amplitude of the inner cavity of the universal joint relative to the rod.

[0006] This application provides a gauge for detecting the runout amplitude of the inner cavity of a universal joint relative to the rod, which adopts the following technical solution:

[0007] A gauge for detecting the runout amplitude of a universal joint's inner cavity relative to its rod portion includes a base, a clamping assembly for clamping a workpiece to be tested, a detection assembly for detecting the runout of the workpiece's inner cavity, and an operating mechanism for extending the detection point of the detection assembly into the workpiece's inner cavity. The clamping assembly includes at least two support seats and at least one clamping seat. The two support seats are respectively used to support both ends of the workpiece to be tested. The clamping seat is located above the support seats and cooperates with the support seats to limit the vertical degree of freedom of the workpiece to be tested. The detection assembly includes a dial indicator. The operating mechanism includes a first lifting assembly for driving the dial indicator to move vertically and a horizontal driving assembly for driving the dial indicator to move along the rod direction of the workpiece to be tested.

[0008] By adopting the above technical solution, two support seats are used to support the workpiece under test. The cooperation between the support seats and the clamping seat restricts the degree of freedom of the workpiece under test in the horizontal plane, thus preventing vertical displacement during rotation testing. This results in a smaller error in the measured runout amplitude of the workpiece's inner cavity relative to the rod. Simultaneously, both the support seats and the clamping seat apply external force to the workpiece under test, keeping the inner cavity open. In this state, the detection component can be inserted into the inner cavity of the workpiece to directly test the runout amplitude of the inner cavity relative to the rod during rotation. There is no error caused by reference conversion, allowing for accurate measurement of the runout amplitude of the inner cavity relative to the rod.

[0009] Optionally, one of the abutments corresponds to one support, and the abutment is located directly above its corresponding support. At least one abutment corresponds to the support closest to the end of the workpiece to be tested away from its inner cavity.

[0010] By adopting the above technical solution, if the rod of the workpiece to be tested is short, it may be "top-heavy" and tilt. By limiting and clamping the end of the workpiece to be tested away from its inner cavity by the clamping seat and support seat, it is ensured that the workpiece to be tested can be fixed more stably by the clamping assembly, thereby improving the accuracy of the test.

[0011] Optionally, the support base includes a support part and two support wheels rotatably connected to the support part, with a placement gap formed between the two support wheels for placing the workpiece to be tested. The lower end of the clamping base is provided with a clamping wheel, and the clamping wheel and the support wheel cooperate to limit the vertical degree of freedom of the workpiece to be tested.

[0012] By adopting the above technical solution, while ensuring the limiting of the workpiece under test, the design of the support wheel and the clamping wheel makes the workpiece under test roll with the support wheel and the clamping wheel during rotation, so that the workpiece under test can rotate more easily to meet the testing requirements.

[0013] Optionally, the abutment is connected to the base via a second lifting assembly, which is used to drive the abutment to move in the vertical direction.

[0014] By adopting the above technical solution, after the workpiece to be tested is completed, the clamping seat can be moved upward directly through the second lifting component, so that the clamping wheel leaves the workpiece to be tested, which facilitates the loading and unloading of the workpiece to be tested.

[0015] Optionally, the second lifting assembly includes a main frame for connection to the base, a sub-frame slidably connected to the main frame in the vertical direction via an adjustment assembly, and a linear drive for connection to the abutment seat. The linear drive is mounted on the sub-frame and is used to drive the abutment seat to move closer to or away from the workpiece to be measured.

[0016] By adopting the above technical solution, multiple adjustments can be made through the adjustment components and linear drive components, making the adjustment range of the clamping seat in the vertical direction wider.

[0017] Optionally, the support seat corresponding to the anti-locking seat is installed on the sub-frame.

[0018] By adopting the above technical solution, the position of the sub-frame relative to the main frame can be adjusted by adjusting the components, thereby adjusting the height of the support corresponding to the clamping seat, so that the workpiece under test is as horizontal as possible, thereby reducing test errors.

[0019] Optionally, at least one support includes a fixing part, an adjusting part slidably connected to the fixing part in a vertical direction, and a locking member for fixing the adjusting part to the fixing part. The fixing part is used to connect with the base, and the adjusting part is used to connect with the support wheel.

[0020] By adopting the above technical solution, the height of the support wheel can be adjusted by sliding the relative fixed part, so that the workpiece under test is as horizontal as possible, thereby reducing test errors.

[0021] Optionally, the base includes a fixed seat and an adjustable seat slidably connected to the fixed seat. The horizontal drive assembly is used to drive the adjustable seat to move horizontally relative to the fixed seat, and the support seat is mounted on the adjustable seat.

[0022] By adopting the above technical solution, the distance between the support base and the detection component is adjusted by sliding the adjustment base relative to the fixed base, so that workpieces of various sizes can be detected by the detection component, thus expanding the application range of the inspection tool.

[0023] Optionally, the support base closest to the dial indicator is fixedly installed on the adjustment base, and the support base furthest from the dial indicator is slidably connected to the adjustment base along the direction of the workpiece rod to be measured.

[0024] By adopting the above technical solution, the distance between the support seats can be adjusted by sliding the relative adjustment seat and the support seat, so that the support seats can better support the workpieces to be measured of various lengths, thus expanding the application range of the inspection tool.

[0025] Optionally, the first lifting assembly includes a connecting frame, a coarse adjustment lifting component mounted on the connecting frame, a fine adjustment lifting component mounted on the output end of the coarse adjustment lifting component, and a clamp mounted on the output end of the fine adjustment lifting component, wherein the clamp is used to connect a dial indicator.

[0026] By adopting the above technical solution, the height of the dial indicator can be better adjusted through coarse adjustment and fine adjustment lifting components, ensuring that the dial indicator probe can contact the inner cavity of the workpiece to be tested, so that the test can be carried out smoothly.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. When the workpiece is rotated, the runout amplitude of the inner cavity of the workpiece relative to the rod is directly tested. There is no error caused by reference conversion, and the runout amplitude of the inner cavity of the workpiece relative to the rod can be accurately obtained.

[0029] 2. This ensures that the workpiece to be measured is confined in the vertical plane, can rotate smoothly in the circumferential direction, and remains as horizontal as possible in the axial direction, so as to make the measurement process smooth and reduce test errors;

[0030] 3. It allows for convenient loading and unloading of the workpiece to be tested;

[0031] 4. It can be applied to workpieces of various sizes and lengths, and has a wide range of applications. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the workpiece to be tested in the prior art.

[0033] Figure 2 This is a schematic diagram of the structure of Example 1.

[0034] Figure 3 This is a schematic diagram of the base and the second lifting assembly in Embodiment 1.

[0035] Figure 4 This is a schematic diagram of the structure of the first lifting component in Embodiment 1.

[0036] Figure 5 This is a schematic diagram of the support base in Example 1.

[0037] Figure 6 This is a schematic diagram of the structure of Example 2.

[0038] Explanation of reference numerals in the attached drawings: 1. Workpiece to be measured; 11. Inner cavity; 12. Rod; 2. Base; 21. Fixed seat; 22. Adjusting seat; 221. Adjusting slide groove; 223. Locking bolt; 3. Clamping assembly; 31. Support seat; 311. Support part; 3111. Fixed part; 31111. Sliding groove; 3112. Adjusting part; 3113. Locking element; 312. Support wheel; 32. Clamping seat; 321. Clamping wheel; 33. Support frame; 4. Dial indicator; 51. First lifting assembly; 511. Connecting frame; 512. Coarse adjustment lifting component; 5121. Side slide rail; 5122. Side slide seat; 512 3. Coarse adjustment screw; 513. Fine adjustment lifting component; 5131. Intermediate seat; 5132. First limit screw; 5133. Connecting spring; 5134. Rotating seat; 5135. Pull rod; 5136. Second limit screw; 4. Clamp; 5141. Clamping head; 51411. Clamping bolt; 5142. Mounting hole; 52. Horizontal drive assembly; 521. Bottom slide rail; 522. Bottom slide seat; 523. Horizontal screw; 6. Second lifting assembly; 61. Main frame; 62. Sub-frame; 63. Linear drive component; 64. Adjustment assembly; 641. Main seat; 642. Main adjustment screw; 7. Force application component. Detailed Implementation

[0039] The current method for detecting the runout amplitude of the universal joint's internal cavity relative to the rod is as follows:

[0040] Please refer to Figure 1 A bowl-shaped fixture is placed against the inner cavity 11 of the workpiece 1 under test, with the ejector pin pressing against the center hole of the rod 12 of the workpiece 1 under test, which is considered as positioning the workpiece 1 under test. Then, the runout of the outer wall of the rod 12 of the workpiece 1 under test is detected, and the runout of the inner cavity 11 of the workpiece 1 under test is evaluated by a reference transformation. Due to the reference transformation, the impact on the product cannot be accurately assessed, which may cause large runouts that are not detected in actual testing, resulting in jamming and posing a safety hazard.

[0041] In summary, if the test error of the runout amplitude of the inner cavity 11 of the workpiece 1 relative to the rod 12 is too large, it will cause reliability problems for the product. How to accurately obtain the runout amplitude of the inner cavity 11 of the workpiece 1 relative to the rod 12 is an urgent problem to be solved.

[0042] Therefore, this utility model provides a gauge for detecting the runout amplitude of the inner cavity of a universal joint relative to the rod.

[0043] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0044] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0046] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0047] Example 1: This application discloses a gauge for detecting the runout amplitude of the inner cavity of a universal joint relative to the rod.

[0048] Please refer to Figure 1 and Figure 2 In one embodiment of this application, a gauge for detecting the runout amplitude of a universal joint cavity relative to its rod portion includes a base 2, a clamping assembly 3, a detection assembly, and an operating mechanism. The base 2 includes a fixed seat 21 and an adjusting seat 22 slidably connected to the fixed seat 21 along the axial direction of the rod portion 12 of the workpiece 1. The clamping assembly 3 is mounted on the adjusting seat 22 and includes a support seat 31 and a clamping seat 32. The clamping seat 32 is located above the support seat 31 and is connected to the adjusting seat 22 via a second lifting assembly 6. The detection assembly includes a dial indicator 4. The operating mechanism includes a first lifting assembly 51 and a horizontal drive assembly 52. ​​The first lifting assembly 51 drives the dial indicator 4 to move vertically relative to the fixed seat 21, and the horizontal drive assembly 52 drives the adjusting seat 22 to move horizontally relative to the fixed seat 21.

[0049] During operation, the second lifting assembly 6 moves the clamping seat 32 away from the support seat 31, placing the workpiece 1 to be tested on the support seat 31. Then, the second lifting assembly 6 moves the clamping seat 32 toward the support seat 31. Through the cooperation of the support seat 31 and the clamping seat 32, the workpiece 1 to be tested is stably clamped on the base 2. Then, the first lifting assembly 51 moves the dial indicator 4 to the same height as the workpiece 1 to be tested. The horizontal drive assembly 52 moves the adjusting seat 22, causing the workpiece 1 to move toward the dial indicator 4 until the probe of the dial indicator 4 inserts into the inner cavity 11 of the workpiece 1 and contacts the side wall of the inner cavity 11. At this time, the workpiece 1 to be tested is rotated by external force, and the dial indicator 4 can directly measure the runout amplitude of the inner cavity 11 of the workpiece 1 relative to the rod 12 without the need for reference conversion, resulting in high detection accuracy.

[0050] Please refer to Figure 3 Specifically, the horizontal drive assembly 52 includes a bottom slide rail 521 mounted on the fixed base 21, a bottom slide block 522 slidably connected to the bottom slide rail 521 and fixedly connected to the lower end of the adjusting base 22, a horizontal screw 523 passing through the bottom slide rail 521 along the length of the slide rail and rotatably connected to the slide rail via a bearing, and a force-applying component 7 for applying force to the screw. The horizontal screw 523 passes through the slide block and is threadedly connected to the bottom slide block 522. The force-applying component 7 is a manual force-applying disc or a motor; in this embodiment, the force-applying component 7 is a force-applying disc.

[0051] When it is necessary to slide the adjustment seat 22 relative to the fixed seat 21, the horizontal screw 523 can be rotated by the force-applying component 7, so that the bottom slide seat 522 can slide on the bottom slide rail 521, thereby realizing the sliding of the adjustment seat 22 relative to the fixed seat 21 along the axis of the workpiece 1 to be measured.

[0052] For details, please refer to Figure 4 The first lifting assembly 51 includes a connecting frame 511, a coarse adjustment lifting component 512 mounted on the connecting frame 511, a fine adjustment lifting component 513 mounted on the output end of the coarse adjustment lifting component 512, and a clamp 514 mounted on the output end of the fine adjustment lifting component 513. The connecting frame 511 is fixedly mounted on one end of the fixed base 21. The height of the dial indicator 4 is adjusted by the cooperation of the coarse adjustment lifting component 512 and the fine adjustment lifting component 513, so as to better adjust the height of the dial indicator 4 and ensure that the probe of the dial indicator 4 can contact the inner cavity 11 of the workpiece 1 to be tested, so that the test can be carried out smoothly.

[0053] For details, please refer to Figure 4The coarse adjustment lifting component 512 includes a side slide rail 5121 vertically arranged and fixedly connected to the connecting frame 511, a side slide seat 5122 slidably connected to the side slide rail 5121, and a coarse adjustment screw 5123 vertically arranged and rotatably connected to the connecting frame 511 via a bearing. The coarse adjustment screw 5123 passes through the side slide seat 5122 and is threadedly connected to the side slide seat 5122. One end of the coarse adjustment screw 5123 is also provided with a force-applying component 7. By applying force to the coarse adjustment screw 5123 through the force-applying component 7, the coarse adjustment screw 5123 can be driven to rotate, causing the side slide seat 5122 to slide vertically, thereby adjusting the height of the dial indicator 4.

[0054] For details, please refer to Figure 4 The fine-tuning lifting component 513 includes an intermediate seat 5131 fixedly connected to the side slide seat 5122, a rotating seat 5134 rotatably connected to the intermediate seat 5131, a first limiting screw 5132 threaded vertically to the side slide seat 5122, and a connecting spring 5133 connecting the rotating seat 5134 and the side slide seat 5122. The lower end of the first limiting screw 5132 abuts against the rotating seat 5134. The connecting spring 5133 is used to control the rotating seat 5134 to remain horizontal when not driven by external force. One end of the first limiting screw 5132 is also provided with a force-applying component 7. By applying force to the first limiting screw 5132 through the force-applying component 7, the first limiting screw 5132 can be driven to rotate, so that the lower end of the first limiting screw 5132 moves vertically. Under the action of the connecting spring 5133, the rotating seat 5134 is always in the state of abutting against the lower end of the first limiting screw 5132.

[0055] The rotating base 5134 is equipped with a pull rod 5135 for easy application of force. In use, the height of the clamp 514 is first adjusted using the coarse adjustment lifting component 512 until the pull rod 5135 is pulled, causing the rotating base 5134 to rotate, at which point the probe of the dial indicator 4 can contact the inner cavity 11 of the workpiece 1 to be measured. At this point, the pull rod 5135 is released, and the rotating base 5134 returns to a horizontal position under the action of the connecting spring 5133. The probe of the dial indicator 4 no longer contacts the inner cavity 11 of the workpiece 1, thus allowing the workpiece 1 to be rotated easily to change the detection point. After the workpiece 1 is rotated to the desired position, the pull rod 5135 is pulled again to rotate the rotating base 5134, so that the probe of the dial indicator 4 contacts the inner cavity 11 of the workpiece 1.

[0056] The first limiting screw 5132 prevents the rotating seat 5134 from over-resetting under the action of the connecting spring 5133. In order to prevent the rotating seat 5134 from over-rotating due to excessive pulling of the pull rod 5135, a second limiting screw 5136 is threaded on the rotating seat 5134 along the axis parallel to the workpiece 1 to be measured. When the pull rod 5135 is pulled until the second limiting screw 5136 abuts against the side slide seat 5122, the rotating seat 5134 rotates to its limit.

[0057] For details, please refer to Figure 4 The clamp 514 is fixedly mounted on the rotating base 5134. The clamp 514 includes a clamping head 5141, which includes two symmetrically arranged clamping parts and a clamping bolt 51411. Each clamping part has a semi-circular hole, forming a mounting hole 5142 for accommodating the dial indicator 4 mounting shaft. The clamping bolt passes through one clamping part and is threaded to the other. By tightening the clamping bolt 51411, the two clamping parts are brought closer together until the mounting hole 5142 clamps the dial indicator 4 mounting shaft, thus completing the fixation of the dial indicator 4.

[0058] For details, please refer to Figure 3 The second lifting assembly 6 includes a main frame 61 connected to the base 2, a secondary frame 62 connected to the main frame 61, and a linear drive 63 for connecting to a clamping seat 32. The clamping seat 32 is mounted on the output end of the linear drive 63. The linear drive 63 is mounted on the secondary frame 62 and is used to drive the clamping seat 32 closer to or further away from the workpiece 1 to be measured. The linear drive 63 can be a manual lead screw structure, an electric cylinder, a pneumatic cylinder, or a hydraulic cylinder, etc. In this embodiment, a manual lead screw structure is used as an example.

[0059] For further details, please refer to... Figure 3 The sub-frame 62 is slidably mounted on the main frame 61 in the vertical direction via the adjustment assembly 64. The height of the clamping seat 32 is adjusted by the cooperation of the adjustment assembly 64 and the linear drive component 63 to better limit the workpiece 1 under test, so that the test can be carried out smoothly.

[0060] For details, please refer to Figure 3 The adjusting assembly 64 includes a main seat 641 fixedly mounted on the main frame 61 and a main adjusting screw 642 arranged vertically. Two main seats 641 are spaced apart vertically. The main adjusting screw 642 passes through the two main seats 641 and is rotatably connected to the main seats 641 via bearings. The main adjusting screw 642 passes through the sub-frame 62 and is threadedly connected to the sub-frame 62. One end of the main adjusting screw 642 is also provided with a force-applying element 7. By applying force to the main adjusting screw 642 through the force-applying element 7, the main adjusting screw 642 can be rotated, causing the sub-frame 62 to slide vertically relative to the main frame 61, thereby adjusting the height of the abutment 32.

[0061] For further details, please refer to Figure 2 At least two support seats 31 are provided and distributed along the axial direction of the workpiece 1 to be tested, thereby providing multi-point support for the workpiece 1 to be tested, making the workpiece 1 to be tested more stable during testing. In this embodiment, two support seats 31 are used as an example for specific explanation. Let the support seat 31 closer to the detection component be the first support seat, and the support seat 31 farther away from the detection component be the second support seat.

[0062] For further details, please refer to Figure 5 The support base 31 includes a support portion 311 and two support wheels 312 rotatably connected to the support portion 311. A placement gap is formed between the two support wheels 312 for placing the workpiece 1 to be tested. This allows the workpiece 1 to rotate more easily by rolling friction with the support wheels 312, thus meeting the testing requirements.

[0063] For further details, please refer to Figure 5 The support portion 311 of the first support base is telescopic. By adjusting the length of the support portion 311, the height of the support wheel 312 can be adjusted, thereby making the heights of the first support base and the second support base better match each other, so that the workpiece 1 to be measured can be placed more horizontally on the clamping assembly 3.

[0064] For details, please refer to Figure 5 The support portion 311 of the first support base includes a fixing portion 3111, an adjusting portion 3112 slidably connected to the fixing portion 3111 in the vertical direction, and a locking member 3113 for fixing the adjusting portion 3112 to the fixing portion 3111. The fixing portion 3111 is fixedly installed on the adjusting base 22, and the support wheel 312 is rotatably installed on the adjusting portion 3112. The locking member 3113 is a bolt. The fixing portion 3111 has a sliding groove 31111 in the vertical direction, and at least two sliding grooves 31111 are arranged in parallel. One locking member 3113 corresponds to one sliding groove 31111, and the locking member 3113 passes through its corresponding sliding groove 31111 and is threadedly connected to the adjusting portion 3112. When the locking member 3113 is loosened, the adjusting portion 3112 can slide relative to the fixing portion 3111; when the locking member 3113 is tightened, the adjusting portion 3112 is fixed relative to the fixing portion 3111. This allows the support portion 311 to extend and retract.

[0065] For further details, please refer to Figure 3 At least one clamping seat 32 is provided. In this embodiment, one clamping seat 32 is used as an example for specific explanation. The clamping seat 32 is located above the second support seat. A clamping wheel 321 is provided at the lower end of the clamping seat 32. The clamping wheel 321 and the support wheel 312 cooperate to limit the vertical degree of freedom of the workpiece 1 to be measured.

[0066] For further details, please refer to Figure 3 The second support is fixedly installed on the sub-frame 62. When the workpiece 1 to be tested is limited by the clamping wheel 321 and the support wheel 312, if the sub-frame 62 slides relative to the main frame 61 at this time, the matching limitation of the second support and the clamping seat on the workpiece 1 to be tested still exists. Therefore, the height of the rod 12 end of the workpiece 1 to be tested can be adjusted by adjusting the position of the sub-frame 62 relative to the main frame 61, so that the workpiece 1 to be tested is kept as horizontal as possible. Moreover, during the adjustment process, the workpiece 1 to be tested is in a limited state and is not easy to fall off the support 31.

[0067] For further details, please refer to Figure 2 and Figure 3 The first support is fixedly installed on the adjusting seat 22. The main frame 61 is slidably connected to the adjusting seat 22. By sliding the main frame 61 relative to the adjusting seat 22, the distance between the second support and the first support can be adjusted, so that the support 31 can better support the workpiece 1 of various lengths to be measured, thus expanding the application range of the inspection tool.

[0068] For details, please refer to Figure 3 An adjusting groove 221 is provided on the adjusting seat 22 along the length of the workpiece 1 to be measured. An adjusting block is slidably connected to the adjusting groove 221, and the adjusting block is fixedly connected to the main frame 61. A locking bolt 223 is threadedly connected to the main frame 61, passing through the main frame 61 and the adjusting block and being threaded to the adjusting block. When it is necessary to slide the main frame 61 relative to the adjusting seat 22, the locking bolt 223 is loosened. After the main frame 61 is adjusted to a suitable position, the locking bolt 223 is tightened so that the locking bolt 223 abuts against the bottom wall of the adjusting groove 221, thereby fixing the main frame 61 relative to the adjusting seat 22.

[0069] The detection principle of this embodiment is as follows:

[0070] 1. Before testing, adjust the height of the first support to make the heights of the two support seats 31 as similar as possible;

[0071] 2. The main frame 61 slides relative to the adjustment seat 22 so that the distance between the two support seats 31 matches the length of the workpiece 1 to be measured, and the workpiece 1 to be measured can be supported by the two support seats 31 at the same time.

[0072] 3. The height of the clamping seat 32 is adjusted by the linear drive component 63, so that the clamping seat 32 moves away from the support seat 31, thereby allowing the workpiece 1 to be tested to be easily placed on the second support seat.

[0073] 4. The height of the clamping seat 32 is then adjusted by the linear drive component 63, so that the clamping seat 32 moves toward the side closer to the support seat 31 until the support wheel 312 and the clamping wheel 321 together limit the workpiece 1 to be measured.

[0074] 5. By adjusting component 64, the sub-frame 62 moves relative to the main frame 61, thereby adjusting the height of the second support relative to the first support, so as to further ensure that the workpiece 1 to be tested is stably supported by the two support seats 31.

[0075] 6. Adjust the height of dial indicator 4 to be close to the height of the inner cavity 11 of the workpiece 1 to be measured by using the coarse adjustment lifting component 512 in the first lifting assembly 51;

[0076] 7. The horizontal drive assembly 52 causes the adjusting seat 22 to slide on the fixed seat 21, so that the probe of the dial indicator 4 enters the inner cavity 11 of the workpiece 1 to be measured.

[0077] 8. Finally, pull the lever 5135 to rotate the rotating seat 5134, so that the probe of the dial indicator 4 contacts the inner cavity of the workpiece 1 to measure the value of a point in the workpiece 1; release the lever 5135 to remove the probe of the dial indicator 4 from the workpiece 1, and then slowly rotate the workpiece 1 to make the probe of the dial indicator 4 contact the inner cavity of the workpiece 1 to measure the value of a point in the workpiece 1.

[0078] 9. Repeat step 8 to record readings at multiple points inside the workpiece 1 to complete the measurement.

[0079] Example 2: The difference between Example 2 and Example 1 is that the clamping assembly 3 further includes a support frame 33. Both the support frame 33 and the first support seat are detachably connected to the adjusting seat 22 by bolts. If the workpiece 1 to be tested has already been fitted with a bearing seat, the first support seat is removed from the adjusting seat 22. The support frame 33 supports the bearing seat of the workpiece 1 to be tested, so that the test can be carried out smoothly.

[0080] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A gauge for detecting the amplitude of the runout of the inner cavity of a universal joint relative to the shaft, characterized in that: The device includes a base (2), a clamping assembly (3) for clamping the workpiece (1) to be tested, a detection assembly for detecting the runout of the inner cavity (11) of the workpiece (1) to be tested, and an operating mechanism for extending the detection point of the detection assembly into the inner cavity (11) of the workpiece. The clamping assembly (3) includes at least two support seats (31) and at least one clamping seat (32). The two support seats (31) are respectively used to support the two ends of the workpiece (1) to be tested. The clamping seat (32) is located above the support seats (31) and is used to cooperate with the support seats (31) to limit the vertical degree of freedom of the workpiece (1) to be tested. The detection assembly includes a dial indicator (4). The operating mechanism includes a first lifting assembly (51) for driving the dial indicator (4) to move in the vertical direction and a horizontal driving assembly (52) for driving the dial indicator (4) to move in the direction of the rod of the workpiece (1) to be tested.

2. The gauge for detecting the jump amplitude of the inner cavity of the gimbal relative to the rod part according to claim 1, characterized in that: One of the abutments (32) corresponds to one support (31), and the abutment (32) is located directly above its corresponding support (31). At least one abutment (32) corresponds to the support (31) closest to the end of the workpiece (1) away from its inner cavity (11).

3. The gauge for detecting the jump amplitude of the inner cavity of the gimbal relative to the rod part according to claim 1, characterized in that: The support base (31) includes a support part (311) and two support wheels (312) rotatably connected to the support part (311). A placement gap is formed between the two support wheels (312) for placing the workpiece (1) to be tested. The lower end of the clamping seat (32) is provided with a clamping wheel (321). The clamping wheel (321) and the support wheel (312) cooperate to limit the vertical degree of freedom of the workpiece (1) to be tested.

4. The gauge for detecting the jump amplitude of the inner cavity of the gimbal relative to the rod part according to claim 1, characterized in that: The abutment (32) is connected to the base (2) via the second lifting assembly (6), which is used to drive the abutment (32) to move in the vertical direction.

5. A gauge for detecting the runout of the inner cavity of a gimbal relative to the shaft portion of the gimbal as claimed in claim 4, wherein: The second lifting assembly (6) includes a main frame (61) for connection with the base (2), a sub-frame (62) slidably connected to the main frame (61) in the vertical direction via an adjustment assembly (64), and a linear drive (63) for connection with the abutment (32). The linear drive (63) is mounted on the sub-frame (62) and is used to drive the abutment (32) to move closer to or away from the workpiece (1) to be measured.

6. A gauge for detecting the magnitude of the runout of the inner cavity of a gimbal relative to the shaft portion of the gimbal as claimed in claim 5, wherein: The support seat (31) corresponding to the abutment seat (32) is installed on the subframe (62).

7. The tool for detecting the jump of the inner cavity of the universal joint relative to the rod part according to claim 1 or 2, characterized in that: At least one support base (31) includes a fixing part (3111), an adjusting part (3112) slidably connected to the fixing part (3111) in a vertical direction, and a locking member (3113) for fixing the adjusting part (3112) to the fixing part (3111). The fixing part (3111) is used to connect with the base (2), and the adjusting part (3112) is used to connect with the support wheel (312).

8. The gauge of claim 1, wherein: The base (2) includes a fixed seat (21) and an adjusting seat (22) slidably connected to the fixed seat (21). The horizontal drive assembly (52) is used to drive the adjusting seat (22) to move horizontally relative to the fixed seat (21). The support seat (31) is mounted on the adjusting seat (22).

9. A gauge for detecting the runout amplitude of the universal joint cavity relative to the rod portion according to claim 8, characterized in that: The support base (31) closest to the dial indicator (4) is fixedly installed on the adjustment base (22), and the support base (31) furthest from the dial indicator (4) is slidably connected to the adjustment base (22) along the direction of the rod of the workpiece (1) to be measured.

10. The gauge of claim 1, wherein: The first lifting assembly (51) includes a connecting frame (511), a coarse adjustment lifting component (512) mounted on the connecting frame (511), a fine adjustment lifting component (513) mounted on the output end of the coarse adjustment lifting component (512), and a clamp (514) mounted on the output end of the fine adjustment lifting component (513). The clamp (514) is used to connect a dial indicator (4).

Images