Alternating torque loading device and method

Abstract

This invention discloses an alternating torque loading device and method, relating to the field of force loading. The alternating torque loading device includes a frame, a support base, a pulley block unit, a wire rope, a weight unit, a flywheel block unit, a product mounting unit, a product tooling unit, a product unit, a force loading electric cylinder unit, a force sensing unit, and an encoder unit; at least one support base is mounted on the frame at a predetermined position. By mounting the product unit on the product mounting unit, in conjunction with the flywheel block unit, force sensing unit, and force loading electric cylinder unit, the loading torque value can be effectively controlled, solving the problem of alternating torque loading. By installing a universal joint bearing between the force loading electric cylinder unit and the force sensing unit, the coaxiality problem during assembly is solved. By connecting the weight unit to the flywheel block unit of the product tooling unit via the pulley block unit and the wire rope, the problem of circumferential torque loading is solved.

Description

Technical Field

[0001] This invention relates to the field of force loading, and more specifically to an alternating torque loading device and loading method. Background Technology

[0002] Currently, most types of force loading are achieved through servo motors and electric cylinders. Although this method is relatively common, it still has some problems. For example, when the torque is small, there are problems such as the inability to overcome friction and the inability to accurately load the torque, which can easily affect the test results. When the torque is large, there are problems such as the inability to control the torque value and the easy damage to the force sensor. At the same time, the effect of force loading by existing servo motors and electric cylinders is also limited by the friction of the electric cylinder lead screw, which has many shortcomings. Summary of the Invention

[0003] Purpose of the invention: This invention addresses the above-mentioned shortcomings by providing an alternating torque loading device and loading method to solve the problems existing in the prior art.

[0004] Technical solution: Alternating torque loading device, including a frame, support base, pulley block unit, wire rope, weight unit, flywheel block unit, product installation unit, product tooling unit, product unit, force loading electric cylinder unit, force sensing unit and encoder unit;

[0005] At least one support base is installed at a predetermined position on the platform. A pulley unit is rotatably mounted on the support base. A steel wire rope is fitted onto the pulley unit. The two ends of the steel wire rope are respectively connected to a weight unit and a flywheel unit located on both sides of the platform. A product tooling unit is provided on the flywheel unit at a predetermined position near the platform. A product mounting unit is installed at a predetermined position on the side of the platform near the product tooling unit. A product unit is provided between the product mounting unit and the product tooling unit. An encoder unit is installed at the end of the product mounting unit. A force-loading electric cylinder unit is installed at a predetermined position on the side of the platform near the flywheel unit. A force-sensing unit is provided between the force-loading electric cylinder unit and the flywheel unit.

[0006] In a further embodiment, the weight unit includes a connecting seat, a screw, a second nut, a base, a first nut, and a weight body;

[0007] The connecting seat is connected to the end of the wire rope, and a screw is connected to the end of the connecting seat away from the wire rope. A second nut is fitted between the connecting seat and the screw. The base is set at a predetermined position on the screw, and a first nut is fitted between the base and the screw. The weight body abuts against the base and is clamped to the screw for loading circumferential torque.

[0008] In a further embodiment, the flywheel assembly unit includes a flywheel body, at least one set of clamping seats and clamping blocks, and a pair of fixing plates;

[0009] The flywheel body is located at the end of the wire rope away from the weight unit. At least one set of clamping seats and clamping blocks that cooperate with each other to clamp the flywheel body and the wire rope are installed on the flywheel body. A pair of fixing plates are symmetrically installed at predetermined positions on the flywheel body to connect the flywheel assembly unit and the product tooling unit.

[0010] In a further embodiment, the product mounting unit includes a pair of mounting brackets and a mounting shaft;

[0011] A pair of fixed brackets are symmetrically installed at predetermined positions on the platform; a fixed shaft is rotatably mounted on the pair of fixed brackets and passes through the pair of fixed brackets, and the fixed shaft is connected to both the encoder unit and the product unit.

[0012] In a further embodiment, the product unit includes a product hook and a product tray;

[0013] The product hook is installed at a predetermined position on the fixed shaft; the product disc is installed at the end of the product hook and engaged with the product tooling unit.

[0014] In a further embodiment, the product tooling unit includes a product mounting fixture and a product pressure plate;

[0015] The product mounting fixture is connected to a pair of flywheel bodies; the product pressure plate is installed on the side of the product mounting fixture away from the flywheel assembly unit, and is used to install the product unit with the product mounting fixture.

[0016] In a further embodiment, the encoder unit includes an encoder body, a coupling, an encoder drive shaft, an encoder support, an encoder bracket, a second bearing, and a second snap ring.

[0017] The encoder body is located on one side of the fixed shaft end, and a coupling and an encoder drive shaft are connected in sequence between the encoder body and the fixed shaft; the encoder support is installed at a predetermined position on the frame, and an encoder bracket is connected between the encoder support and the encoder body; a second bearing and a second snap ring are connected between the encoder support and the encoder drive shaft.

[0018] In a further embodiment, the force-loading electric cylinder unit includes an electric cylinder body, a pair of electric cylinder clamps, a pair of electric cylinder supports, and external threaded lugs;

[0019] The electric cylinder body is positioned at a predetermined location on the platform. A pair of electric cylinder clamps are symmetrically arranged on the outer side of the electric cylinder body. Each pair of electric cylinder clamps is connected to an electric cylinder bracket for fixing to the platform. An external threaded lug is connected to the end of the electric cylinder body for connecting to a force sensing unit.

[0020] In a further embodiment, the force sensing unit includes a tension sensor, a first earring, and a second earring;

[0021] The tension sensor is positioned between the external threaded ear and the flywheel assembly unit; the first ear is installed between the tension sensor and the external threaded ear; the second ear is installed at a predetermined position on the flywheel assembly unit at the end of the tension sensor away from the first ear, for use in conjunction with the force-loading electric cylinder unit to control the loading torque value and the loading of alternating torque.

[0022] In a further embodiment, the loading method of the alternating torque loading device includes the following steps:

[0023] S1. Install the product unit between the product mounting unit and the product tooling unit, then loosen the connection between the force sensing unit and the force loading electric cylinder unit, and hang weights with different torques on the screw. The torque of the weights will change direction through the wire rope and the pulley unit on the support base, and be loaded onto the rotating shaft of the product unit through the flywheel body to simulate the resistance of the product unit at different speeds and test the working ability of the product unit under different loads.

[0024] S2. Install the product unit between the product mounting unit and the product tooling unit, then connect the force sensing unit to the force loading electric cylinder unit, remove the weight body, start the force loading electric cylinder unit, and apply an alternating sinusoidal torque to the rotating shaft of the product unit through the flywheel assembly unit to simulate the resistance of the product unit under rapid acceleration and deceleration, and test the working ability of the product unit under alternating load.

[0025] Beneficial effects: This invention discloses an alternating torque loading device and loading method. By mounting the product unit on the product mounting unit, and cooperating with the flywheel assembly unit, force sensing unit, and force loading electric cylinder unit, the loading torque value can be effectively controlled, solving the problem of alternating torque loading. By installing a universal joint bearing between the force loading electric cylinder unit and the force sensing unit, the coaxiality problem during assembly is solved. By cooperating with the pulley assembly unit and the wire rope connecting weight unit on the flywheel assembly unit of the product tooling unit, the problem of circumferential torque loading is solved. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention.

[0027] Figure 2This is a schematic diagram of the main structure of a part of the present invention.

[0028] Figure 3 This is a three-dimensional structural diagram of the pulley system of the present invention.

[0029] Figure 4 This is a side view of the product installation unit, product tooling unit, encoder unit, and product unit of the present invention.

[0030] Figure 5 This is a three-dimensional structural diagram of the product mounting unit, encoder unit, and product unit of the present invention.

[0031] Figure 6 This is a three-dimensional structural diagram of the force-loading electric cylinder unit and the force-sensing unit of the present invention.

[0032] Figure 7 This is a three-dimensional structural diagram of the encoder unit of the present invention.

[0033] Figure 8 This is a three-dimensional structural schematic diagram of the entire invention from another perspective.

[0034] The figures are labeled as follows: 1. Stand, 2. Support base, 3. Pulley block unit, 301. Roller body, 302. Support wheel axle, 303. First snap ring, 304. First bearing, 4. Steel wire rope, 5. Weight unit, 501. Weight body, 502. Chassis, 503. Screw, 504. First nut, 505. Second nut, 506. Connecting seat, 6. Flywheel block unit, 601. Flywheel body, 602. Clamping seat, 603. Clamping block, 604. Fixing plate, 7. Product mounting unit, 701. Fixing frame, 702. Fixing shaft, 8. Product tooling unit, 801. Product mounting clamp. 802. Product pressure plate, 9. Product unit, 901. Product hook, 902. Product disc, 10. Force loading electric cylinder unit, 1001. Electric cylinder body, 1002. External threaded clevis, 1003. Electric cylinder clamp, 1004. Electric cylinder bracket, 11. Force sensing unit, 1101. Tension sensor, 1102. First clevis, 1103. Second clevis, 12. Encoder unit, 1201. Encoder body, 1202. Encoder bracket, 1203. Encoder support, 1204. Coupling, 1205. Encoder drive shaft, 1206. Second bearing, 1207. Second snap ring. Detailed Implementation

[0035] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid obscuring the invention.

[0036] The applicant argues that most existing force loading methods are achieved through servo motors and electric cylinders. While this method is common, it still presents several problems. For example, when the torque is small, there are issues such as the inability to overcome friction and the inability to accurately load the torque, which can easily affect the test results. When the torque is large, there are issues such as the inability to control the torque value and the potential damage to the force sensor. Furthermore, the effectiveness of existing servo motor and electric cylinder force loading is limited by the friction of the electric cylinder lead screw, resulting in numerous shortcomings.

[0037] Therefore, the applicant proposes an alternating torque loading device and a loading method, wherein the alternating torque loading device, such as... Figures 1-8 As shown, it includes a stand 1, a support base 2, a pulley block unit 3, a wire rope 4, a weight unit 5, a flywheel block unit 6, a product installation unit 7, a product tooling unit 8, a product unit 9, a force loading electric cylinder unit 10, a force sensing unit 11, and an encoder unit 12.

[0038] At least one support base 2 is installed at a predetermined position on the platform 1. A pulley block unit 3 is rotatably mounted on the support base 2. A steel wire rope 4 is mounted on the pulley block unit 3. The two ends of the steel wire rope 4 are respectively connected to a weight unit 5 and a flywheel block unit 6 located on both sides of the platform 1. A product tooling unit 8 is mounted on the flywheel block unit 6 at a predetermined position near the platform 1. A product mounting unit 7 is mounted at a predetermined position on the side of the platform 1 near the product tooling unit 8. A product unit 9 is arranged between the product mounting unit 7 and the product tooling unit 8. An encoder unit 12 is mounted at the end of the product mounting unit 7. A force loading electric cylinder unit 10 is mounted at a predetermined position on the side of the platform 1 near the flywheel block unit 6. A force sensing unit 11 is arranged between the force loading electric cylinder unit 10 and the flywheel block unit 6.

[0039] In this application, the pulley unit 3 includes a support wheel shaft 302 disposed at the end of the support base 2, a roller body 301 rotatably disposed on the support wheel shaft 302, and a first snap ring 303 and a first bearing 304 disposed between the roller body 301 and the support wheel shaft 302. The specific structure and principle can be referred to the prior art. The pulley unit 3 is used to change the direction of the wire rope 4, thereby changing the torque loading direction of the weight unit 5.

[0040] In addition, pulley block unit 3, wire rope 4, weight unit 5, flywheel block unit 6, product installation unit 7, product tooling unit 8, product unit 9, force loading electric cylinder unit 10, force sensing unit 11, and encoder unit 12 are correspondingly set with support base 2. In actual use, at least one support base 2 is set on the frame 1, and at least one pulley block unit 3, wire rope 4, weight unit 5, flywheel block unit 6, product installation unit 7, product tooling unit 8, product unit 9, force loading electric cylinder unit 10, force sensing unit 11, and encoder unit 12 are also set.

[0041] Specifically, such as Figures 1-2 As shown, the weight unit 5 includes a connecting seat 506, a screw 503, a second nut 505, a base 502, a first nut 504, and a weight body 501. The flywheel assembly unit 6 includes a flywheel body 601, at least one set of clamping seats 602 and clamping blocks 603, and a pair of fixing plates 604.

[0042] The connecting seat 506 is connected to the end of the wire rope 4. A screw 503 is connected to the end of the connecting seat 506 away from the wire rope 4. A second nut 505 is connected between the connecting seat 506 and the screw 503. The base 502 is set at a predetermined position on the screw 503. A first nut 504 is set between the base 502 and the screw 503. The weight body 501 abuts against the base 502 and is clamped to the screw 503 for loading circumferential torque. The flywheel body 601 is set at the end of the wire rope 4 away from the weight unit 5. At least one set of clamping seats 602 and clamping blocks 603 are clamped on the flywheel body 601 for clamping the flywheel body 601 and the wire rope 4. A pair of fixing plates 604 are symmetrically installed at predetermined positions on the flywheel body 601 for connecting the flywheel assembly unit 6 and the product tooling unit 8.

[0043] In addition, such as Figures 4-7 As shown, the product mounting unit 7 includes a pair of fixing brackets 701 and a fixing shaft 702; the product unit 9 includes a product hook 901 and a product disc 902; the product tooling unit 8 includes a product mounting fixture 801 and a product pressure plate 802; and the encoder unit 12 includes an encoder body 1201, a coupling 1204, an encoder drive shaft 1205, an encoder support 1203, an encoder bracket 1202, a second bearing 1206, and a second snap ring 1207.

[0044] A pair of fixed brackets 701 are symmetrically installed at predetermined positions on the platform 1. A fixed shaft 702 is rotatably mounted on the pair of fixed brackets 701 and passes through the pair of fixed brackets 701. The fixed shaft 702 is connected to both the encoder unit 12 and the product unit 9. A product hook 901 is installed at a predetermined position on the fixed shaft 702. A product disc 902 is installed at the end of the product hook 901 and engages with the product tooling unit 8. A product mounting fixture 801 is connected to a pair of flywheel bodies 601. A product pressure plate 802 is fitted onto the product mounting fixture 801 away from the flywheel assembly unit. One side of 6 is used to install product unit 9 with product mounting fixture 801. The encoder body 1201 is set on one side of the end of fixed shaft 702. The encoder body 1201 and fixed shaft 702 are connected in sequence by coupling 1204 and encoder drive shaft 1205. The encoder support 1203 is installed at a predetermined position on the stand 1. The encoder support 1202 is connected between encoder support 1203 and encoder body 1201. The second bearing 1206 and second snap ring 1207 are connected between encoder support 1203 and encoder drive shaft 1205.

[0045] like Figure 6 As shown, the force loading electric cylinder unit 10 includes an electric cylinder body 1001, a pair of electric cylinder clamps 1003, a pair of electric cylinder supports 1004 and an external threaded earring 1002, and the force sensing unit 11 includes a tension sensor 1101, a first earring 1102 and a second earring 1103.

[0046] The electric cylinder body 1001 is positioned at a predetermined location on the test stand 1. A pair of electric cylinder clamps 1003 are symmetrically arranged on the outer side of the electric cylinder body 1001. Each pair of electric cylinder clamps 1003 is connected to an electric cylinder bracket 1004 for fixing to the test stand 1. An external threaded clevis 1002 is connected to the end of the electric cylinder body 1001 for connecting to the force sensing unit 11. A tension sensor 1101 is positioned between the external threaded clevis 1002 and the flywheel assembly unit 6. A first clevis 1102 is installed between the tension sensor 1101 and the external threaded clevis 1002. A universal joint bearing is provided between the first clevis 1102 and the external threaded clevis 1002. A second clevis 1103 is installed at a predetermined location on the flywheel assembly unit 6 at the end of the tension sensor 1101 away from the first clevis 1102, for cooperating with the force loading electric cylinder unit 10 to control the loading torque value and the loading of alternating torque.

[0047] In this application, the product unit 9 is installed on the product mounting unit 7, and together with the flywheel assembly unit 6, the force sensing unit 11, and the force loading electric cylinder unit 10, the loading torque value can be effectively controlled, and problems such as alternating torque loading can be solved. By installing a universal joint bearing between the force loading electric cylinder unit 10 and the force sensing unit 11, problems such as coaxiality during assembly can be solved. By coordinating the pulley assembly unit 3 and the steel wire rope 4 to connect the weight unit 5 on the flywheel assembly unit 6 of the product tooling unit 8, problems such as circumferential torque loading can be solved.

[0048] Based on the above technical solution, the specific working process of the present invention is as follows: the product unit 9 is installed between the product installation unit 7 and the product tooling unit 8, then the connection between the force sensing unit 11 and the force loading electric cylinder unit 10 is loosened, and weight bodies 501 with different torques are hung on the screw 503. The torque of the weight body 501 will change direction through the wire rope 4 and the pulley group unit 3 on the support seat 2, and be loaded onto the rotation shaft of the product unit 9 through the flywheel body 601 to simulate the resistance of the product unit 9 at different speeds and test the working ability of the product unit 9 under different loads.

[0049] The product unit 9 is installed between the product mounting unit 7 and the product tooling unit 8. Then, the force sensing unit 11 is connected to the force loading electric cylinder unit 10, and the weight body 501 is removed. The force loading electric cylinder unit 10 is started, and an alternating sinusoidal torque is applied to the rotating shaft of the product unit 9 through the flywheel assembly unit 6 to simulate the resistance of the product unit 9 under rapid acceleration and deceleration, and to test the working ability of the product unit 9 under alternating load.

[0050] As described above, although the invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. An alternating torque loading device, characterized in that, include: stand; At least one support base is installed at a predetermined position on the platform. A pulley unit is rotatably mounted on the support base. A steel wire rope is fitted on the pulley unit. The two ends of the steel wire rope are respectively connected to a weight unit and a flywheel unit located on both sides of the platform. A product tooling unit is provided on the flywheel unit at a predetermined position near the platform. The product mounting unit is installed at a predetermined position on the side of the stand near the product tooling unit. A product unit is provided between the product mounting unit and the product tooling unit. An encoder unit is installed at the end of the product mounting unit. A force-loading electric cylinder unit is installed at a predetermined position on the side of the test stand near the flywheel assembly unit, and a force-sensing unit is provided between the force-loading electric cylinder unit and the flywheel assembly unit. The flywheel assembly unit includes: The flywheel body is located at the end of the wire rope away from the weight unit. At least one set of clamping seats and clamping blocks that cooperate with each other to clamp the flywheel body and the wire rope. A pair of fixing plates are symmetrically installed at predetermined positions on the flywheel body to connect the flywheel assembly unit and the product tooling unit.

2. The alternating torque loading device according to claim 1, characterized in that: The weight unit includes: A connecting seat is connected to the end of the wire rope. A screw is connected to the end of the connecting seat away from the wire rope. A second nut is fitted between the connecting seat and the screw. A chassis is disposed at a predetermined position on the screw, and a first nut is provided between the chassis and the screw. The main body of the weight is abutted against the chassis and clamped to the screw, and is used for loading circumferential torque.

3. The alternating torque loading device according to claim 1, characterized in that: The product installation unit includes: A pair of fixed brackets are symmetrically installed at predetermined positions on the platform; A fixed shaft is rotatably mounted on and passes through a pair of fixed frames. The fixed shaft is connected to both the encoder unit and the product unit.

4. The alternating torque loading device according to claim 3, characterized in that: The product unit includes: The product hook is installed at a predetermined position on the fixed shaft; The product tray is installed at the end of the product hook and engaged with the product tooling unit.

5. The alternating torque loading device according to claim 1, characterized in that: The product tooling unit includes: The product mounting fixture is connected to a pair of flywheel bodies; The product pressure plate is installed on the side of the product mounting fixture away from the flywheel assembly unit, and is used to install the product unit with the product mounting fixture.

6. The alternating torque loading device according to claim 3, characterized in that: The encoder unit includes: An encoder body is disposed on one side of the end of the fixed shaft, and a coupling and an encoder drive shaft are sequentially connected between the encoder body and the fixed shaft; An encoder support is installed at a predetermined position on the frame. An encoder bracket is connected between the encoder support and the encoder body. A second bearing and a second snap ring are connected between the encoder support and the encoder drive shaft.

7. The alternating torque loading device according to claim 1, characterized in that: The force-loading electric cylinder unit includes: The electric cylinder body is set at a predetermined position on the platform. A pair of electric cylinder clamps are symmetrically arranged on the outer side of the electric cylinder body. Each pair of electric cylinder clamps is connected to an electric cylinder bracket for fixing to the platform. An external threaded lug is attached to the end of the electric cylinder body and is used to connect the force sensing unit.

8. The alternating torque loading device according to claim 7, characterized in that: The force sensing unit includes: A tension sensor is disposed between the external threaded lug and the flywheel assembly unit; The first earring is installed between the tension sensor and the external threaded earring; The second earring is installed at a predetermined position on the flywheel unit at the end of the tension sensor away from the first earring, and is used to cooperate with the force loading electric cylinder unit to control the loading torque value and the loading of alternating torque.

9. The loading method of the alternating torque loading device according to any one of claims 1 to 8, characterized in that, Includes the following steps: S1. Install the product unit between the product mounting unit and the product tooling unit. Then, loosen the connection between the force sensing unit and the force loading electric cylinder unit, and hang weights with different torques on the screw. The torque of the weights will change direction through the wire rope and the pulley unit on the support base, and be loaded onto the rotating shaft of the product unit through the flywheel unit to simulate the resistance of the product unit at different speeds and test the working ability of the product unit under different loads. S2. Install the product unit between the product mounting unit and the product tooling unit, then connect the force sensing unit to the force loading electric cylinder unit, remove the weights, start the force loading electric cylinder unit, and apply an alternating sinusoidal torque to the rotating shaft of the product unit through the flywheel unit to simulate the resistance of the product unit under rapid acceleration and deceleration and test the working ability of the product unit under alternating loads.

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