An adjustable hub torque testing fixture

Abstract

This utility model discloses an adjustable hub torque testing fixture, including a base plate. A fixture body is fixed to the front top of the base plate by several bolts, and a pressure assembly is fixed to the rear top of the base plate by several bolts. This adjustable hub torque testing fixture, through the adjustment assembly, allows for adjustment of the distance between the two limit plates by rotating the crank handle, which in turn rotates the lead screw and displaces the limit plates. This adapts to hubs of different lengths, improving adaptability and practicality. The pressure assembly uses a pressure cylinder to press down the drive arm with a pressure block, generating axial force on the drive arm. A pressure sensor monitors and provides real-time feedback of the applied pressure value, determining the magnitude of the applied pressure and the stability of the applied pressure during testing. Compared to traditional manual application of force, this fixture can accurately apply a uniform and stable predetermined force value, eliminating human error.

Description

Technical Field

[0001] This utility model relates to the field of hub torque testing, and more particularly to an adjustable hub torque testing fixture. Background Technology

[0002] The hub is a core component of a bicycle wheelset, referring to a metal or composite material sleeve located at the center of the wheel and connected to the frame via an axle. Internally, it contains bearings, ratchet, and pawl mechanisms, while externally, spokes are connected to both ends. Its core function is to support the smooth rotation of the wheel around the axle and transmit power through the chain via the freehub, achieving efficient power transmission and gliding. It is a key component affecting the wheel's rotational speed, rigidity, and transmission efficiency. Therefore, after production, it needs to undergo torque testing to verify its strength, leading to the development of a hub torque testing fixture.

[0003] A hub torque testing fixture is a device that assesses the running resistance of a hub by simulating riding loads. Its working principle involves fixing the hub between the drive and non-drive side clamps, applying rotational force to the drive-side torque shaft, and relying on a mechanical torque meter or sensor to read the resistance torque values ​​generated by the bearings, seals, and ratchet mechanism inside the hub. This determines whether the hub meets the usage standards. While traditional hub torque testing fixtures offer high efficiency and accuracy, they still have some shortcomings. For example, they rely on fixed fixtures, making it difficult to adapt to hubs of different lengths, requiring constant fixture changes and affecting testing efficiency. Traditional testing often uses manual pressure to simulate the running resistance experienced by the hub during rotation; however, manual force application has poor stability, and the downward pressure and rotational speed cannot be precisely controlled, resulting in poor repeatability and high subjectivity in the test results. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this invention is to provide an adjustable hub torque testing fixture.

[0005] The following technical solution is adopted: an adjustable hub torque testing fixture includes a base plate, a fixture body is fixedly mounted on the front top of the base plate by a number of bolts, a pressure assembly is fixedly mounted on the rear top of the base plate by a number of bolts, and an adjustment assembly is fixedly mounted on the top of the base plate.

[0006] Optionally, the adjustment assembly includes a guide block, a groove is provided on one side of the top of the base plate, the guide block is slidably connected to the inner wall of the groove, a lead screw is threaded through and connected to the inside of the guide block, the lead screw is rotatably connected to both sides of the inner wall of the groove, a crank is rotatably connected to one side of the base plate, the crank is fixedly connected to the end of the lead screw away from the guide block, and a scale is fixed on one side of the top of the base plate by screws.

[0007] Optionally, the pressurizing component includes a support base, and a pressurizing cylinder is fixedly provided at the top of the support base. The telescopic end of the pressurizing cylinder passes through the top of the support base and is fixedly connected to a bracket.

[0008] Optionally, a pressure sensor is fixedly installed inside the bracket. The pressure sensor passes through the bottom end of the bracket and is slidably connected to a pressing block. The pressing block is connected to the inside of the pressure sensor.

[0009] Optionally, the fixture body includes two limiting plates. A torsion shaft is rotatably connected through the top of each limiting plate. A limiting rod is slidably connected through the inside of the torsion shaft. The torsion shaft is fixedly engaged with the top of the limiting plate via the limiting rod. A hub body is meshed with one end of the torsion shaft. A support cylinder is movably sleeved inside the end of the hub body away from the torsion shaft. The support cylinder is rotatably connected to the through portion at the top of the limiting rod. The limiting rod passes through the inside of the support cylinder, and the support cylinder is fixedly engaged with the through portion at the top of the limiting plate via the limiting rod.

[0010] Optionally, a drive arm is engaged with the outer wall of the end of the hub body away from the torque shaft, and the drive arm is located directly below the pressure block.

[0011] Optionally, a pointer is fixedly provided on one side of the bottom end of the limiting plate.

[0012] Optionally, the base plate has two limiting grooves that extend through it, and the two limiting grooves are fixedly connected to the two sides of the limiting plate by bolts.

[0013] The technical effects that can be achieved by the technical means of this utility model are as follows:

[0014] (1) In this utility model, by setting an adjustment component, by turning the handle, the lead screw is driven to rotate, which in turn drives the limit plate to move, so as to adjust the distance between the two limit plates to adapt to different lengths of the hub body and improve adaptability and practicality.

[0015] (2) In this utility model, by setting up a pressurizing component, the pressurizing cylinder is used to press down the driving arm by the lowering block, thereby generating axial force in the driving arm. The pressure sensor can monitor and feedback the downward pressure value applied by the lowering block in real time, so as to determine the magnitude of the applied downward pressure value and the stability of the applied pressure during the test. Compared with the traditional manual application of force, it can accurately apply a uniform and stable predetermined force value and eliminate the error of human operation. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a three-dimensional structural diagram of the fixture body of this utility model;

[0018] Figure 3 This is a three-dimensional structural diagram of the adjustment component of this utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of the pressurization component of this utility model.

[0020] In the diagram: 1. Base plate; 2. Fixture body; 201. Limiting plate; 202. Torque shaft; 203. Hub body; 204. Drive arm; 205. Support cylinder; 206. Limiting lever; 3. Pressurization assembly; 301. Pressurization cylinder; 302. Support seat; 303. Lowering block; 304. Bracket; 305. Pressure sensor; 4. Adjustment assembly; 401. Pointer; 402. Scale; 403. Guide block; 404. Lead screw; 405. Crank handle; 406. Limiting groove; 407. Slide groove. Detailed Implementation

[0021] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0022] In the description of this utility model, it should be noted that the orientations or positional relationships indicated by terms such as "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within 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.

[0024] A preferred embodiment of the adjustable drum torque testing fixture provided by this utility model is as follows: Figures 1 to 4 As shown: An adjustable hub torque testing fixture includes a base plate 1, a fixture body 2 fixed to the front top of the base plate 1 by several bolts, a pressure assembly 3 fixed to the rear top of the base plate 1 by several bolts, and an adjustment assembly 4 fixed to the top of the base plate 1.

[0025] In this embodiment, the adjustment component 4 includes a guide block 403. A groove 407 is provided on one side of the top of the base plate 1. The guide block 403 is slidably connected to the inner wall of the groove 407. A lead screw 404 is threaded through and connected to the inside of the guide block 403. The lead screw 404 is rotatably connected to both sides of the inner wall of the groove 407. A crank handle 405 is rotatably connected to one side of the base plate 1. The crank handle 405 is fixedly connected to the end of the lead screw 404 away from the guide block 403. A scale 402 is fixedly provided on one side of the top of the base plate 1 by screws.

[0026] Through the above scheme, by turning the crank handle 405, the lead screw 404 is driven to rotate. Since the lead screw 404 is threadedly connected to the guide block 403 through part, the rotation of the lead screw 404 drives the guide block 403 to slide along the inner wall of the slide groove 407, thereby causing the limiting plate 201 to move and achieve the purpose of adjusting the distance between the two limiting plates 201 to adapt to different lengths of the hub body 203, thereby improving adaptability and practicality.

[0027] In this embodiment, the pressurizing component 3 includes a support base 302. A pressurizing cylinder 301 is fixedly provided at the top of the support base 302. The telescopic end of the pressurizing cylinder 301 passes through the top of the support base 302 and is fixedly connected to a bracket 304. A pressure sensor 305 is fixedly provided inside the bracket 304. The pressure sensor 305 passes through the bottom of the bracket 304 and is slidably connected to a lower pressure block 303. The lower pressure block 303 is connected to the inside of the pressure sensor 305.

[0028] The above scheme utilizes the pressurizing cylinder 301 to drive the bracket 304 to move downward, thereby causing the lower pressure block 303 to press down the drive arm 204, generating axial force in the drive arm 204. This simulates the real working condition of the running resistance encountered when the hub rotates. The pressure sensor 305 can monitor and provide feedback on the downward pressure value applied by the lower pressure block 303 in real time, which is used to determine the magnitude of the applied downward pressure value and the stability of the applied pressure during the test. Compared with the traditional manual application of force, it can accurately apply a uniform and stable predetermined force value, eliminating the error of human operation.

[0029] In this embodiment, the fixture body 2 includes two limiting plates 201. A torsion shaft 202 is rotatably connected through the top of the limiting plate 201. A limiting rod 206 is slidably connected through the inside of the torsion shaft 202. The torsion shaft 202 is fixedly engaged with the top of the limiting plate 201 through the limiting rod 206. A hub body 203 is meshed with one end of the torsion shaft 202. A support cylinder 205 is movably sleeved inside the end of the hub body 203 away from the torsion shaft 202. The support cylinder 205 is rotatably connected to the through part of the top of the limiting rod 206. The limiting rod 206 passes through the inside of the support cylinder 205, and the support cylinder 205 is fixedly engaged with the through part of the top of the limiting plate 201 through the limiting rod 206.

[0030] In the above scheme, the end of the torque shaft 202 away from the hub body 203 is connected to an external torque sensor. When the torque shaft 202 is subjected to force, a reaction torque will be generated at the meshing point between the hub body 203 and the torque shaft 202, so as to test the torque value.

[0031] In this embodiment, a drive arm 204 is engaged with the outer wall of the end of the hub body 203 away from the torque shaft 202, and the drive arm 204 is located directly below the lower pressure block 303.

[0032] With the above solution, the drive arm 204 engages with the outer wall of the hub body 203 away from the torsion shaft 202, so that the downward pressure of the drive arm 204 by the pressure block 303 can be accurately transmitted to the hub body 203.

[0033] In this embodiment, a pointer 401 is fixedly provided on one side of the bottom end of the limiting plate 201.

[0034] With the above scheme, the pointer 401, together with the scale 402, can intuitively display the distance that the two limit plates 201 have been pulled apart compared with the initial minimum distance, which is convenient for adjustment according to the length of the hub body 203.

[0035] In this embodiment, two limiting grooves 406 are formed through the interior of the base plate 1, and the two limiting grooves 406 are fixedly connected to the two sides of the limiting plate 201 by bolts.

[0036] With the above solution, when the hub body 203 is fixed between the two limiting plates 201, the two sides of the limiting plates 201 are fixed to the inner walls of the two limiting grooves 406 by bolts to prevent the hub body 203 from shifting during the test, which would cause measurement deviation.

[0037] Working principle: When operating and using this utility model, as follows... Figures 1 to 4 As shown, when using it, first install the hub body 203 between the two limiting plates 201, turn the crank handle 405 to drive the lead screw 404 to rotate. Since the lead screw 404 is threadedly connected to the guide block 403 through part, the rotation of the lead screw 404 drives the guide block 403 to slide along the inner wall of the slide groove 407, causing the limiting plate 201 to move. Observe the reading of the pointer 401 pointing to the scale 402, and adjust it according to the length of the hub body 203.

[0038] One end of the hub body 203 is engaged with the torque shaft 202. The outer wall of the end of the hub body 203 away from the torque shaft 202 is engaged with the drive arm 204. Then, the handle 405 is cranked so that the other end of the hub body 203 is fitted onto the support cylinder 205. After the hub body 203 is stabilized between the two limiting plates 201, the two sides of the limiting plates 201 are fixed to the inner walls of the two limiting grooves 406 with bolts to prevent the hub body 203 from shifting during the test, which would cause measurement deviation.

[0039] During testing, the pressurizing cylinder 301 drives the bracket 304 to move downward, thereby causing the lower pressure block 303 to press down the drive arm 204, generating axial force in the drive arm 204 to simulate the real working condition of the running resistance encountered when the hub rotates. The pressure sensor 305 can monitor and provide feedback on the downward pressure value applied by the lower pressure block 303 in real time, in order to determine the magnitude of the applied downward pressure value and the stability of the applied pressure during the test.

[0040] Set the downward pressure of the pressure block 303 to a set standard force value, observe and record the reading of the external torque sensor connected to the torque shaft 202, and determine whether the hub body 203 meets the usage standard.

[0041] The above are merely illustrative embodiments of this utility model and are not intended to limit the scope of this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model. Furthermore, it should be noted that the components of this utility model are not limited to the overall application described above. Each technical feature described in the specification of this utility model can be used individually or in combination as needed. Therefore, this utility model naturally covers other combinations and specific applications related to the points of this utility model.

Claims

1. An adjustable flower drum torsion test fixture comprising a base plate (1), characterized in that: The jig body (2) is fixed to the front top of the base plate (1) by several bolts, the pressure assembly (3) is fixed to the rear top of the base plate (1) by several bolts, and the adjustment assembly (4) is fixed to the top of the base plate (1). The adjustment assembly (4) includes a guide block (403). A groove (407) is provided on one side of the top of the base plate (1). The guide block (403) is slidably connected to the inner wall of the groove (407). A lead screw (404) is threaded through and connected to the inside of the guide block (403). The lead screw (404) is rotatably connected to both sides of the inner wall of the groove (407). A crank handle (405) is rotatably connected to one side of the base plate (1). The crank handle (405) is fixedly connected to the end of the lead screw (404) away from the guide block (403). A scale (402) is fixedly provided on one side of the top of the base plate (1) by screws.

2. The adjustable hub torsion test fixture of claim 1, wherein: The pressurizing component (3) includes a support base (302), and a pressurizing cylinder (301) is fixedly provided at the top of the support base (302). The extension end of the pressurizing cylinder (301) passes through the top of the support base (302) and is fixedly connected to a bracket (304).

3. The adjustable hub torsion test fixture of claim 2, wherein: A pressure sensor (305) is fixedly installed inside the bracket (304). The pressure sensor (305) passes through the bottom end of the bracket (304) and is slidably connected to a pressing block (303). The pressing block (303) is connected to the inside of the pressure sensor (305).

4. The adjustable hub torque testing fixture according to claim 1, characterized in that: The fixture body (2) includes two limiting plates (201). A torsion shaft (202) is rotatably connected through the top of the limiting plate (201). A limiting rod (206) is slidably connected through the inside of the torsion shaft (202). The torsion shaft (202) is fixedly engaged with the top of the limiting plate (201) through the limiting rod (206). A hub body (203) is meshed with one end of the torsion shaft (202). A support cylinder (205) is movably sleeved inside the end of the hub body (203) away from the torsion shaft (202). The support cylinder (205) is rotatably connected to the through part of the top of the limiting rod (206). The limiting rod (206) passes through the inside of the support cylinder (205), and the support cylinder (205) is fixedly engaged with the through part of the top of the limiting plate (201) through the limiting rod (206).

5. An adjustable hub torque testing fixture according to claim 4, characterized in that: The hub body (203) is connected to a drive arm (204) on the outer wall of one end away from the torsion shaft (202), and the drive arm (204) is located directly below the pressure block (303).

6. The adjustable hub torque testing fixture according to claim 4, characterized in that: A pointer (401) is fixedly provided on one side of the bottom end of the limiting plate (201).

7. The adjustable hub torque testing fixture according to claim 1, characterized in that: The base plate (1) has two limiting grooves (406) that run through it. The two limiting grooves (406) are fixedly connected to the two sides of the limiting plate (201) by bolts.

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