Testing tool for damping force of shock absorber of roller washing machine

Abstract

The utility model discloses a testing tool for damping force of a drum washing machine shock absorber, which comprises a base and a testing frame arranged on the base, the testing frame comprises a guide post, a sliding platform connected with the guide post in a sliding manner and a driving piece for driving the sliding platform to slide, the sliding platform is provided with a connecting frame, and the base is provided with a tension sensor. A mounting rack is arranged on the tension sensor, the top end of the damper and the bottom end of the connecting rack are inserted and fixed through a first bolt pin, and the bottom end of the damper and the upper end of the mounting rack are inserted and fixed through a second bolt pin. The utility model provides a tool for testing damping force of a shock absorber of a roller washing machine, and solves the problem that the shock absorber and a tension sensor are complex in installation and are not firm in installation.

Description

Technical Field

[0001] This utility model relates to shock absorbers, and in particular to a testing fixture for the damping force of shock absorbers in drum washing machines. Background Technology

[0002] During operation, washing machines generate vibrations and noise due to the impact of water and the machine's own vibrations. These vibrations not only affect the internal components and structure of the washing machine but also shorten its lifespan. To improve the durability of the washing machine and the user experience, multiple shock absorbers are usually installed around the outside of the washing compartment.

[0003] However, shock absorbers can experience reduced damping force and eventual failure due to internal structural aging during use. To assess the performance changes of newly designed shock absorbers over their service life and predict their lifespan, a shock absorber testing module capable of detecting various length specifications is needed.

[0004] For example, the prior art disclosure number CN221630977U, "A Damping Force Detection Module for a Shock Absorber in a Drum Washing Machine During Each Use Cycle," includes a transmission box. A shock absorption coefficient detection module is positioned on the central axis of the top side of the transmission box. A downward pressure test module is positioned around the shock absorption coefficient detection module on the top of the transmission box. A cyclic drive module is connected to the downward pressure test module. The bottom of the shock absorber to be tested is inserted into the positioning hole, one side of the bottom of the shock absorber is bolted into the positioning slot, and the top of the shock absorber is inserted into the shock absorber fixing slot. The downward pressure test module controls the moving pressure plate to move up and down, continuously extending and retracting the shock absorber. Tension and pressure sensors record the pressure transmitted from the shock absorber to the shock absorber mounting base. By detecting multiple cycles, the life parameters of this type of shock absorber and the changes in the damping force of the shock absorber in each cycle can be obtained.

[0005] However, the method of installing the shock absorber bottom into the shock absorber base described above is quite cumbersome, and when using bolts or other fasteners for fixation, bolts are prone to loosening or falling off. More importantly, this installation method may also cause the bottom of the shock absorber to wobble within the positioning slot, leading to instability. Therefore, this installation method has significant shortcomings in terms of reliability and stability. Utility Model Content

[0006] The purpose of this invention is to provide a testing fixture for the damping force of a shock absorber in a drum washing machine, solving the problems of complex and unstable installation of the shock absorber and the tension sensor.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a testing fixture for the damping force of a shock absorber in a drum washing machine, comprising a base and a testing frame disposed on the base, the testing frame comprising a guide column, a sliding platform slidably connected to the guide column, and a driving component for driving the sliding platform to slide, the sliding platform being provided with a connecting frame, a tension sensor being provided on the base, and a mounting frame being provided on the tension sensor, the top end of the shock absorber being fixed to the bottom end of the connecting frame by a first pin, and the bottom end of the shock absorber being fixed to the top end of the mounting frame by a second pin.

[0008] After adopting the above technical solution, this utility model has the following advantages: The guide column is placed on the base, and the sliding platform moves up and down along the guide column. A tension sensor is also provided on the base, and a connecting frame for installing the shock absorber is provided on the sliding platform. The tension sensor is provided with a mounting frame for fixing the shock absorber. Before the test begins, the top end of the shock absorber is fixed to the bottom end of the connecting frame with a first pin, and the bottom end of the shock absorber is fixed to the top end of the mounting frame with a second pin. When the test begins, the drive component drives the sliding platform to move the shock absorber in a telescopic motion. During this process, the shock absorber generates a damping force, which is transmitted to the tension sensor through the mounting frame. The shock absorber is fixed to the test frame by the first and second pins. This pin-plug installation method does not require complicated installation steps, thus greatly improving installation efficiency. It also ensures that the shock absorber is firmly connected to the connecting frame and the mounting frame, ensuring that the shock absorber will not loosen or fall off due to excessive force during the test, resulting in inaccurate test data, thereby ensuring the accuracy of the damping force test.

[0009] Furthermore, the axes of both the first and second pins are perpendicular to the axis of the shock absorber.

[0010] By adopting the aforementioned technical solution, when in the connected state, the axes of the first pin and the second pin are perpendicular to the axis of the shock absorber. From the perspective of force analysis, in the vertical direction, this force distribution method enables the first pin and the second pin to withstand greater pressure, improves the stability of the shock absorber when connected to the test frame, and avoids displacement and twisting during testing.

[0011] Furthermore, the shock absorber includes a cylinder body and a piston rod inserted into the cylinder body. The cylinder body is fixed to the bottom end of the connecting frame by a first pin, and the piston rod is fixed to the upper end of the mounting frame by a second pin. The sliding platform drives the connecting frame to make the shock absorber perform telescopic movements.

[0012] Using the aforementioned technical solution, the piston rod is fixed to the mounting bracket by a second pin, ensuring both connection strength and shock absorber stability. During testing, the sliding platform drives the connecting bracket to move up and down along the guide column. The cylinder body is fixed to the bottom of the connecting bracket by a first pin, so the cylinder body also moves accordingly. The fixing method using the first and second pins ensures a secure connection between the cylinder body and piston rod to the connecting bracket and mounting bracket, improving the connection stability between the shock absorber and the test frame.

[0013] Furthermore, the connecting frame includes a connecting rod, the bottom end of which is provided with a first groove, and the top end of the cylinder body is provided with a first mounting through hole. The top end of the cylinder body is inserted into the first groove, and a first pin passes through the first groove and the first mounting through hole to fix the connecting rod to the cylinder body.

[0014] Using the aforementioned technical solution, the top of the cylinder is inserted into the first groove, and the first pin passes through the first groove and the first mounting through hole. The connecting rod is fixed to the cylinder by the first pin. This connection method is simple in structure, firm and reliable, reduces the difficulty of installation, and ensures the stability of the connection.

[0015] Furthermore, the sidewall of the first groove is provided with a notch to facilitate observation of the first pin passing through the first mounting through hole.

[0016] Using the aforementioned technical solution, the notch is located on the side wall of the first groove. Its main function is to facilitate observation of whether the first pin has passed through the first mounting through hole, thereby securing the connecting rod to the cylinder body. The notch facilitates the operator's confirmation of the fixing status of the connecting rod to the cylinder body during installation, improving installation efficiency and accuracy.

[0017] Furthermore, the connecting frame includes a fixing plate, which is mounted on the upper surface of the sliding platform, and the connecting rod passes through the sliding platform and connects to the fixing plate.

[0018] Using the aforementioned technical solution, the connecting frame includes a fixed plate placed on the sliding platform and fixedly connected to the connecting rod. The connecting rod, supported by the fixed plate, enhances the connection strength between the connecting frame and the sliding platform. This connection method makes the connection between the connecting frame and the cylinder more stable, thereby improving the overall reliability.

[0019] Furthermore, a second pin is located at the upper end of the mounting bracket, and a second mounting through hole is provided at the bottom end of the piston rod. The second mounting through hole is fitted onto the second pin to fix the piston rod to the mounting bracket.

[0020] By using the aforementioned technical solution, the second mounting through hole of the piston rod is fitted onto the second pin of the mounting bracket. This connection method makes the connection between the two more stable and less prone to falling off. Moreover, the connection method is simple and does not require complicated installation steps. When removing the shock absorber from the mounting bracket, it is only necessary to pull the piston rod directly out of the second pin, which is convenient and quick.

[0021] Furthermore, the bottom of the mounting bracket is directly contacted and fixedly connected to the top of the tension sensor via fasteners.

[0022] Furthermore, the testing fixture also includes a control terminal, which is located on one side of the testing frame. The driving component is a motor, which is located inside the base. The control terminal is electrically connected to the motor to control the motor to drive the sliding platform to move up and down along the guide column.

[0023] By adopting the aforementioned technical solution, precise control of the motor can be achieved through the electrical connection between the control terminal and the motor. This allows the sliding platform to move according to a predetermined trajectory and speed, thereby improving the accuracy and efficiency of the test.

[0024] Furthermore, the tension sensor is electrically connected to the control terminal, which includes a display to show the data fed back by the tension sensor and the operating parameters of the motor.

[0025] By adopting the aforementioned technical solution, since the tension sensor and the control terminal are electrically connected, the control terminal can receive and display the data fed back by the tension sensor in real time. This allows the operator to understand the current damping force data of the shock absorber at any time. The operator can use this data to determine whether the current damping force has reached the expected level and adjust the motor operating parameters as needed. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings:

[0027] Figure 1 This is a schematic diagram of the structure of a testing fixture for the damping force of a shock absorber in a drum washing machine according to the present invention.

[0028] Figure 2 This utility model Figure 1 Enlarged view of point A in the image;

[0029] Figure 3 This is a schematic diagram of the structure of the shock absorber of this utility model. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0031] The terms "first," "second," etc. (if present) in the specification and claims of this utility model are used to distinguish similar objects, not to describe a specific order or sequence. Even if "second" is used before a technical feature for distinction, it does not necessarily imply the presence of "first." It should be understood that in this utility model, "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. It should be understood that in this utility model, "multiple" refers to two or more. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, X and / or Y can represent: X alone, X and Y simultaneously, and Y alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "Containing X, Y, and Z," "Containing X, Y, and Z" means that all three X, Y, and Z are included; "Containing X, Y, or Z" means that one of X, Y, and Z is included; "Containing X, Y, and / or Z" means that any one, two, or three of X, Y, and Z are included.

[0032] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be selected to be combined or substituted with each other according to the actual situation, and the same or similar concepts or processes may not be described again in some embodiments.

[0033] like Figures 1 to 3 As shown, this utility model provides a testing fixture for the damping force of a shock absorber 3 in a drum washing machine. It includes a base 2 and a test frame 1 mounted on the base 2. The test frame 1 includes a guide column 11, a sliding platform 12 slidably connected to the guide column 11, and a driving component for driving the sliding platform 12 to slide. The sliding platform 12 is provided with a connecting frame 13. A tension sensor 21 is provided on the base 2. A mounting frame 22 is provided on the tension sensor 21. The top end of the shock absorber 3 is fixed to the bottom end of the connecting frame 13 by a first pin 131. The bottom end of the shock absorber 3 is fixed to the top end of the mounting frame 22 by a second pin 23.

[0034] Understandably, the guide column 11 is placed on the base 2, and the sliding platform 12 moves up and down along the guide column 11. The base 2 is also equipped with a tension sensor 21, and the sliding platform 12 is equipped with a connecting bracket 13 for mounting the shock absorber 3. The tension sensor 21 is equipped with a mounting bracket 22 for fixing the shock absorber 3. Before the test begins, the top end of the shock absorber 3 is fixed to the bottom end of the connecting bracket 13 by the first pin 131, and the bottom end of the shock absorber 3 is fixed to the top end of the mounting bracket 22 by the second pin 23. When the test begins, the drive unit drives the sliding platform 12 to move the shock absorber 3 in a telescopic motion. During this process, the shock absorber 3 will generate a damping force, which will be transmitted to the tension sensor 21 through the mounting bracket 22. The shock absorber 3 is fixed to the test frame 1 by means of the first pin 131 and the second pin 23. This installation method of pin insertion does not require complicated installation steps, so it greatly improves the installation efficiency. It also makes the connection between the shock absorber 3 and the connecting frame 13 and the mounting frame 22 sufficiently firm, ensuring that the shock absorber 3 will not loosen or fall off due to excessive force during the test, which would lead to inaccurate test data, thus ensuring the accuracy of the damping force test.

[0035] It should be noted that the bottom surface of the base 2 also includes four support feet 24, which are located at the four corners of the base 2 respectively. In order to prevent the base 2 from tilting due to uneven bottom surface, the support feet 24 are designed to be height adjustable. Specifically, the support feet 24 and the base 2 can be connected by threads.

[0036] The guide posts 11 placed on the upper surface of the base 2 are located on both sides of the base 2 along its length. In this embodiment, they are symmetrically arranged. A top plate 111 is also provided at the top of the guide post 11. The guide post 11 is located inside the top plate 111, which helps to support the guide post 11 and make it more stable during operation.

[0037] The testing fixture also includes a control terminal 4, which is located on one side of the test frame 1. In this embodiment, the driving component is a motor, while in other embodiments, a cylinder can also be used. The sliding platform 12 is connected between the two guide columns 11. The control terminal 4 is electrically connected to the motor to control the motor to drive the sliding platform 12 to move up and down along the guide columns 11.

[0038] By connecting the control terminal 4 to the motor via electrical connection, precise control of the motor can be achieved, enabling the sliding platform 12 to move along a predetermined trajectory and speed, thereby improving the accuracy and efficiency of the test.

[0039] Furthermore, regarding the movement of the sliding platform 12 on the guide column 11, in this embodiment, in order to ensure the best accuracy, a lead screw drive connection is adopted in the guide column 11.

[0040] The specific connection method is the same as the lead screw connection method of the pressure test module mentioned in the prior art disclosure number CN221630977U, and will not be elaborated here.

[0041] To improve testing accuracy, the tension sensor 21 is positioned between the two guide posts 11. From a mechanical perspective, this allows for a more balanced force distribution on the shock absorber 3. In this embodiment, since the guide posts 11 are located at the edges of both sides of the base 2, the tension sensor 21 is positioned at the center of the base 2.

[0042] The control terminal 4 also includes a display 41. The tension sensor 21 is electrically connected to the control terminal 4, and the data fed back by the tension sensor 21 and the operating parameters of the motor are displayed on the display 41.

[0043] Since the tension sensor 21 is electrically connected to the control terminal 4, the control terminal 4 can receive and display the data fed back by the tension sensor 21 on the display 41 in real time. This allows the operator to understand the current damping force data of the shock absorber 3 at any time. The operator can use this data to judge whether the current damping force has reached the expected level and adjust the motor operating parameters as needed.

[0044] The display 41 is placed on one side of the test rack 1, which makes it easier for the operator to control the test rack 1.

[0045] Regarding the fixing method between the shock absorber 3 and the test frame 1, the axes of the first pin 131 and the second pin 23 are both set to be perpendicular to the axis of the shock absorber 3.

[0046] This means that when the device is in the connected state, since the axes of the first pin 131 and the second pin 23 are perpendicular to the axis of the shock absorber 3, from the perspective of force analysis, this force distribution method in the vertical direction enables the first pin 131 and the second pin 23 to withstand greater pressure, improving the stability of the shock absorber 3 when connected to the test frame 1 and preventing displacement and twisting during testing.

[0047] Furthermore, the first pin 131 and the second pin 23 are perpendicular to the insertion direction of the shock absorber 3.

[0048] The shock absorber 3 includes a cylinder 31 and a piston rod 32 inserted into the cylinder 31. The cylinder 31 is fixed to the bottom of the connecting frame 13 by a first pin 131, and the piston rod 32 is fixed to the upper end of the mounting frame 22 by a second pin 23. The sliding platform 12 drives the connecting frame 13 to make the shock absorber 3 perform telescopic movements.

[0049] In this embodiment, the piston rod 32 is inserted into the cylinder 31, and the sliding platform 12 drives the cylinder 31 to move. Therefore, relative to the cylinder 31, the piston rod 32 is in a stationary state. Thus, the piston rod 32 is fixed to the mounting bracket 22 by the second pin 23, ensuring both connection strength and the overall stability of the shock absorber 3 mounted on the test frame 1. During testing, the sliding platform 12 drives the connecting bracket 13 to move up and down along the guide column 11. The cylinder 31 and the bottom end of the connecting bracket 13 are fixed by the first pin 131, so the cylinder 31 also moves accordingly. The fixing method using the first pin 131 and the second pin 23 ensures the fixed connection between the cylinder 31 and the piston rod 32 and the connecting bracket 13 and the mounting bracket 22, improving the connection stability between the shock absorber 3 and the test frame 1.

[0050] The connecting frame 13 includes a connecting rod 132. The bottom end of the connecting rod 132 is provided with a first groove 132b. The top end of the cylinder body 31 is provided with a first mounting through hole 311. The top end of the cylinder body 31 is inserted into the first groove 132b. The first pin 131 passes through the first groove 132b and the first mounting through hole 311 to fix the connecting rod 132 to the cylinder body 31.

[0051] The connecting rod 132 is fixed to the cylinder body 31 by the first pin 131. This connection method is simple in structure, firm and reliable, reduces the difficulty of installation and ensures the stability of the connection.

[0052] Specifically, the side wall of the first groove 132b is provided with a notch 132a to facilitate observation of the first pin 131 passing through the first mounting through hole 311. Its main function is to facilitate observation of whether the first pin 131 has passed through the first mounting through hole 311, thereby securing the connecting rod 132 to the cylinder body 31. The notch 132a facilitates the operator's confirmation of the fixing status of the connecting rod 132 to the cylinder body 31 during installation, improving installation efficiency and accuracy.

[0053] The connecting frame 13 also includes a fixing plate 133, which is mounted on the upper surface of the sliding platform 12 and fixed with bolts. The connecting rod 132 passes through the sliding platform 12 and connects to the fixing plate 133. The fixing plate 133 and the connecting rod 132 are integrally formed. With the support of the fixing plate 133, the connection strength between the connecting frame 13 and the sliding platform 12 is enhanced. This connection method makes the connection between the connecting frame 13 and the cylinder 31 more stable, thereby improving the overall reliability.

[0054] The second pin 23 is located at the upper end of the mounting bracket 22 and is integrally formed with the mounting bracket 22. The bottom end of the piston rod 32 has a second mounting through hole 321, which is fitted onto the second pin 23 to fix the piston rod 32 to the mounting bracket 22. By fitting the second mounting through hole 321 of the piston rod 32 onto the second pin 23 of the mounting bracket 22, the connection between the two is more stable and less prone to falling off. The connection method is also simple and does not require complicated installation steps. When removing the shock absorber 3 from the mounting bracket 22, it is only necessary to pull the piston rod 32 directly out of the second pin 23, which is convenient and quick.

[0055] To ensure the accuracy of the test, the bottom of the mounting bracket 22 is in direct contact with and fixedly connected to the top of the tension sensor 2.

[0056] Ideally, the bottom of the mounting bracket 22 can be welded to the top of the tension sensor 21, or fixedly connected by bolts or the like.

[0057] It should be noted that the sliding platform 12, connecting frame 13, and mounting frame 22 mentioned above are all made of metal. Besides the preferred embodiments described above, this utility model has other embodiments. 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 claimed by this utility model.

Claims

1. A testing fixture for the damping force of a shock absorber in a drum washing machine, comprising a base and a testing frame disposed on the base, the testing frame comprising a guide column, a sliding platform slidably connected to the guide column, and a driving component for driving the sliding platform to slide, characterized in that, The sliding platform is equipped with a connecting frame, a tension sensor is installed on the base, and a mounting bracket is installed on the tension sensor. The top of the shock absorber is fixed to the bottom of the connecting frame by a first pin, and the bottom of the shock absorber is fixed to the top of the mounting bracket by a second pin.

2. The test tool for testing the damping force of a shock absorber for a drum-type washing machine according to claim 1, wherein The axes of both the first and second pins are perpendicular to the axis of the shock absorber.

3. The tool for testing the damping force of a shock absorber for a drum-type washing machine according to claim 1, wherein The shock absorber includes a cylinder and a piston rod inserted into the cylinder. The cylinder is fixed to the bottom of the connecting frame by a first pin, and the piston rod is fixed to the top of the mounting frame by a second pin. The sliding platform drives the connecting frame to make the shock absorber perform telescopic movements.

4. The testing fixture for the damping force of a shock absorber in a drum washing machine according to claim 3, characterized in that, The connecting frame includes a connecting rod with a first groove at the bottom and a first mounting through hole at the top of the cylinder. The top of the cylinder is inserted into the first groove, and a first pin passes through the first groove and the first mounting through hole to fix the connecting rod to the cylinder.

5. A test tool for testing the damping force of a shock absorber for a drum washing machine according to claim 4, wherein The first groove sidewall has a notch to facilitate observation of the first pin passing through the first mounting through hole.

6. The tool for testing the damping force of a shock absorber for a drum-type washing machine according to claim 4, wherein The connecting frame includes a fixed plate, which is mounted on the upper surface of the sliding platform, and the connecting rod passes through the sliding platform and is connected to the fixed plate.

7. The tool for testing the damping force of a shock absorber for a drum-type washing machine according to claim 3, wherein The second pin is located at the upper end of the mounting bracket, and the bottom end of the piston rod is provided with a second mounting through hole. The second mounting through hole is fitted onto the second pin to fix the piston rod to the mounting bracket.

8. A testing fixture for the damping force of a shock absorber in a drum washing machine according to claim 3, characterized in that, The bottom of the mounting bracket is in direct contact with and fixedly connected to the top of the tension sensor.

9. The tool for testing the damping force of a shock absorber for a drum-type washing machine according to claim 1, wherein It also includes a control terminal, which is located on one side of the test frame. The driving component is a motor, which is located inside the base. The control terminal is electrically connected to the motor to control the motor to drive the sliding platform to move up and down along the guide column.

10. The tool for testing the damping force of a shock absorber for a drum-type washing machine according to claim 9, wherein The tension sensor is electrically connected to the control terminal, which includes a display to show the data fed back by the tension sensor and the operating parameters of the motor.

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