A fixed vehicle traction control adjustment device

Abstract

This invention provides a fixed vehicle tension control and adjustment device, including a tension warning component and a tension adjustment component. The tension warning component consists of a force-limiting sleeve and a force-limiting lever. When the tension reaches a preset value, the force-limiting lever collides with the force-limiting sleeve under the push of the reaction force, thereby generating a warning sound. The tension adjustment component adjusts the magnitude of the preset tension value by adjusting the length of the lever arm. The tension warning component and the tension adjustment component are fixedly connected. The beneficial effects of this invention are: by using the tension adjustment component and the tension warning component, the tension when fixing the vehicle can be adjusted according to different vehicles, and a warning sound can be emitted through the mechanical structure when a specified tension is reached, indicating to the operator that the predetermined tension has been reached, thereby ensuring the accuracy and reproducibility of the test.

Description

Technical Field

[0001] This invention belongs to the field of vibration and noise testing, and in particular relates to a fixed vehicle tension control and adjustment device. Background Technology

[0002] When consumers experience the quality of a vehicle, NVH (noise, vibration, and harshness) performance has a significant impact on their perception. Therefore, before a vehicle is launched on the market, it needs to undergo a complex NVH testing process, among which testing in a semi-anechoic chamber is a crucial component. By testing in this chamber, most of the operating conditions encountered by a vehicle during driving can be simulated, allowing for the early identification of problems that customers complain about and improving the overall NVH level of the vehicle.

[0003] In the semi-anechoic chamber test of a vehicle rotating wheel, the vehicle travels on the rotating wheel. As the wheels rotate, the rotating wheel rotates synchronously, simulating the vehicle's driving state on a real road surface. Therefore, during the experiment, the vehicle needs to be fixed to the rotating wheel to prevent it from leaving the rotating wheel range when simulating various working conditions in actual driving. The vehicle is typically secured with straps, with both ends connected to the vehicle's tow hook and ground-mounted iron stakes in the vehicle rotating wheel test chamber. The straps are then tightened using a tensioning device.

[0004] The tensioning device currently used in the tests can only ensure that the vehicle is tensioned; it lacks a device for adjusting or measuring the tension force, making it impossible to measure or adjust the tension force. Each time the vehicle is secured, the test engineer's experience is relied upon to fix the vehicle and adjust the vehicle's fixing tension, making it difficult to ensure consistency each time, thus causing fluctuations in the test results. Summary of the Invention

[0005] In view of this, the present invention aims to provide a vehicle-fixing tension control and adjustment device to solve the problem in the prior art that the tension cannot be adjusted or measured, resulting in inconsistent tension each time the vehicle is fixed, thus causing fluctuations in test results.

[0006] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0007] A vehicle-fixing tension control and adjustment device uses straps to fix a test vehicle to a rotating hub. The straps are equipped with ratchet fasteners, and a tension warning component is fixed on the ratchet linkage of the ratchet fasteners. When the operator applies tension to the tension warning component, the ratchet rotates and tightens the straps.

[0008] The tension warning component consists of a force limiting sleeve and a force limiting lever. The force limiting lever is located inside the force limiting sleeve and is hinged to the force limiting sleeve. The diameter of the force limiting lever is smaller than the inner diameter of the force limiting sleeve.

[0009] The force-limiting sleeve is equipped with a pressing slider, and the pressing slider presses against the force-limiting slider.

[0010] Furthermore, the pressing slider is slidably connected to the inner side of the force limiting sleeve rod, and the force limiting slider is rotatably connected to the inner side of the force limiting sleeve rod;

[0011] A compression spring is fixed inside the force-limiting sleeve rod, and a sliding cavity is formed between the compression slider and the force-limiting sleeve rod. The compression spring is located inside the sliding cavity and presses against the compression slider.

[0012] Furthermore, a spring groove is provided at one end of the force-limiting lever near the force-limiting slider, a pushing block is provided in the spring groove, and a slider spring is provided between the pushing block and the spring groove, with the pushing block pressing against the force-limiting slider.

[0013] Furthermore, the force-limiting sleeve is provided with a lever limiting pin, and the force-limiting lever has a through hole that matches the lever limiting pin, with the lever limiting pin located inside the through hole.

[0014] Furthermore, the force-limiting sleeve is provided with a slider limiting pin, and the force-limiting slider has a through hole that matches the slider limiting pin, with the slider limiting pin located inside the through hole.

[0015] Furthermore, a pressure protrusion is fixed at one end of the pressing slider near the force limiting slider, and the apex of the pressure protrusion is located on the side of the slider limiting pin opposite to the direction of the pulling force.

[0016] Furthermore, the ratchet linkage includes a moving lever and a fixed lever;

[0017] The movable rod of the force adjusting rod is slidably connected to the fixed rod of the force adjusting rod, and the movable rod of the force adjusting rod and the fixed rod of the force adjusting rod are in contact with each other. A portion of the force adjusting thread 1 is opened on the movable rod of the force adjusting rod, and another portion of the force adjusting thread 2 corresponding to the force adjusting thread 1 is opened on the fixed rod of the force adjusting rod. The force adjusting thread 1 and the force adjusting thread 2 form a complete force adjusting thread.

[0018] An adjusting screw is rotatably connected to the moving rod of the adjusting rod, and the adjusting screw is threadedly connected to a complete adjusting thread.

[0019] Furthermore, the movable rod of the force adjusting rod is fixedly provided with a movable locking pawl that matches the fixed rod of the force adjusting rod, and the fixed rod of the force adjusting rod is fixedly provided with a fixed locking pawl that matches the movable rod of the force adjusting rod.

[0020] Furthermore, the outer side of the fixed rod of the force adjustment lever is engraved with force adjustment scale, which covers the portion between the moving rod of the force adjustment lever and the fixed locking pawl.

[0021] Compared with the prior art, the fixed vehicle tension control and adjustment device of the present invention has the following advantages:

[0022] The present invention discloses a fixed vehicle tension control and adjustment device, which, through a tension adjustment component and a tension warning component, can adjust the tension when fixing a vehicle according to different vehicles, and can also issue a warning sound through a mechanical structure when a specified tension is reached, so as to remind the operator that the predetermined tension has been reached, thereby ensuring the accuracy and reproducibility of the test. Attached Figure Description

[0023] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0024] Figure 1 This is a schematic diagram of the overall structure of the device described in an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the internal structure of the device described in an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the device structure when the specified tensile force is not reached, as described in an embodiment of the present invention.

[0027] Figure 4 This is a schematic diagram of the device structure for achieving a specified tensile force according to an embodiment of the present invention;

[0028] Figure 5 This is a cross-sectional structural diagram of the pressure protrusion, pressing surface, and return surface described in an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Ratchet fastener; 2. Force limiting lever; 201. Pressing slider; 20101. Pressure protrusion; 202. Pressing spring; 3. Force limiting lever; 301. Force limiting slider; 30101. Pressing surface; 30102. Return surface; 302. Slider spring; 4. Adjusting lever moving rod; 401. Moving locking pawl; 5. Adjusting lever stationary rod; 501. Stationary locking pawl; 6. Adjusting screw. Detailed Implementation

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0032] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] like Figure 1 , Figure 2As shown: A fixed vehicle tension control and adjustment device includes a tension warning component and a tension adjustment component; the tension warning component consists of a force limiting sleeve 2 and a force limiting lever 3. When the tension reaches a preset value, the force limiting lever 3 collides with the force limiting sleeve 2 under the push of the reaction force, thereby generating a warning sound; the tension adjustment component adjusts the magnitude of the preset tension value by adjusting the length of the adjustment device lever arm; the tension warning component and the tension adjustment component are fixedly connected.

[0034] By using the tension adjustment component and the tension warning component, the tension can be adjusted for different vehicles when the vehicle is stationary. When the specified tension is reached, a warning sound will be emitted through the mechanical structure to remind the operator that the predetermined tension has been reached, thus ensuring the accuracy and reproducibility of the test.

[0035] A pressing slider 201 is slidably connected inside the force limiting sleeve 2. A force limiting slider 301 is rotatably connected inside the force limiting sleeve 2. The pressing slider 201 presses against the force limiting slider 301. The force limiting slider 301 is in contact with one end of the force limiting lever 3. The force limiting lever 3 is rotatably connected to the inside of the force limiting sleeve 2. The force limiting lever 3 is fixedly connected to the tension adjustment component.

[0036] A compression spring 202 is fixed inside the force limiting sleeve 2. A sliding cavity is formed between the compression slider 201 and the force limiting sleeve 2. The compression spring 202 is located in the sliding cavity and presses against the compression slider 201.

[0037] The force-limiting lever 3 has a spring groove at one end near the force-limiting slider 301, and a push block is slidably connected in the spring groove; the push block is fixedly connected to the bottom end of the spring groove by a slider spring 302, and the push block presses against the force-limiting slider 301; the contact surface between the force-limiting slider 301 and the push block is an inclined surface.

[0038] The force limiting sleeve 2 is provided with a slider limiting pin, and the force limiting slider 301 has a through hole that matches the slider limiting pin. The slider limiting pin is located inside the through hole. The force limiting sleeve 2 is provided with a lever limiting pin, and the force limiting lever 3 has a through hole that matches the lever limiting pin.

[0039] A pressure protrusion 20101 is fixed at one end of the pressure slider 201 near the force limiting slider 301, and a force limiting protrusion matching the pressure protrusion 20101 is provided on the force limiting slider 301.

[0040] The tension adjustment assembly includes a movable adjustment rod 4 and a fixed adjustment rod 5; the movable adjustment rod 4 and the fixed adjustment rod 5 are slidably connected, the movable adjustment rod 4 and the fixed adjustment rod 5 are in contact with each other, and the contact part is provided with an adjustment thread; an adjustment screw 6 is rotatably connected to the movable adjustment rod 4, and the adjustment screw 6 is threadedly connected to the adjustment thread.

[0041] The movable lever 4 is fixedly provided with a movable locking pawl 401 that matches the fixed lever 5, and the fixed lever 5 is fixedly provided with a fixed locking pawl 501 that matches the movable lever 4.

[0042] The outer side of the fixed lever 5 of the force adjustment lever is engraved with force adjustment scale, which covers the part between the moving lever 4 of the force adjustment lever and the fixed locking pawl 501.

[0043] The end of the force-limiting lever 3 away from the force-limiting sleeve 2 is fixedly connected to the crossbar of the force-adjusting lever 4.

[0044] The compression spring 202 presses the compression slider 201 into the force limiting sleeve 2. One side of the conical protrusion is the compression surface 30101, and the other side is the return surface 30102. The angle between the normal phase of the compression surface 30101 and the sliding direction of the compression slider 201 is α, and the angle between the normal phase of the return surface 30102 and the sliding direction of the compression slider 201 is β, and α is less than β. The preload of the compression slider 201 is related to the spring compression amount, the spring stiffness, and α.

[0045] When the device is in operation, the force-limiting slider 301 and the clamping slider 201 have two contact states, which are divided into clamping state and return state depending on the contact surface:

[0046] like Figure 3 As shown: In the clamping state: the pressure protrusion 20101 of the clamping slider 201 presses against the clamping surface 30101 of the force-limiting slider 301. When the operating mechanism fixes the vehicle, the pulling force exerted by the operator on the force-limiting sleeve 2 is balanced with the torque of the reaction force on the clamping surface 30101 of the force-limiting slider 301. When the pulling force increases, the reaction force also increases with the pulling force. When the axial component of the reaction force is greater than the pressure of the clamping spring 202, the clamping spring 202 is compressed, and the clamping slider 201 slides away from the force-limiting slider 301. The force-limiting sleeve 2 rotates around the lever limit pin. When the top of the pressure protrusion 20101 passes the top protrusion of the force-limiting slider 301, the force-limiting sleeve 2 collides with the force-limiting lever 3 and emits a warning sound due to the collision, reminding the operator that the pulling force exerted on the force-limiting sleeve 2 has reached the preset torque.

[0047] like Figure 4As shown: Return state: When the operator hears the impact warning sound, the pressing slider 201 contacts the return surface 30102 of the force limiting slider 301, and the pressing spring 202 is in a contracted state. The operator releases the force limiting sleeve 2, and the pressing slider 201 slides under the action of the pressing spring 202, pushing the force limiting slider 301 to rotate around the slider limit pin. At the same time, the force limiting slider 301 pushes the force limiting sleeve 2 to rotate around the lever limit pin through wall contact. Since the two have different rotation radii, they will gradually disengage during the rotation. As the rotation angle increases, the top of the pressure protrusion 20101 passes over the top protrusion of the force limiting slider 301. Under the action of the slider spring 302, the force limiting slider 301 returns to the initial position angle. At this time, the pressing surface 30101 presses against the force limiting slider 301, and the force limiting lever 3 returns to the initial position.

[0048] The adjusting screw 6 is fixed to the transverse connecting rod of the adjusting rod moving rod 4 via a fixed bearing. The adjusting screw 6 can only rotate along the bearing axis. The scale position is calibrated by the locking claw 501 of the adjusting rod moving rod 4 and the adjusting rod fixed rod 5. When the adjusting screw 6 is rotated, the adjusting screw 6 generates an upward force along the adjusting thread. The adjusting rod moving rod 4 and the adjusting rod fixed rod 5 move relative to each other, thereby adjusting the length of the lever arm of the mechanism and achieving the function of adjusting the tension.

[0049] Those skilled in the art will recognize that the units and method steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0050] In the several embodiments provided in this application, it should be understood that the disclosed methods and systems can be implemented in other ways. For example, the division of units described above is merely a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. The aforementioned units may or may not be physically separated. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of the embodiments of the present invention according to actual needs.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fixed vehicle tension control and adjustment device, characterized in that: The test vehicle is secured to the hub using straps. The straps are equipped with ratchet fasteners (1). A tension warning component is fixed on the ratchet linkage of the ratchet fasteners (1). The staff applies tension to the tension warning component, which drives the ratchet to rotate and tighten the straps. The tension warning component consists of a force limiting sleeve (2) and a force limiting lever (3). The force limiting lever (3) is located inside the force limiting sleeve (2) and is hinged to the force limiting sleeve (2). The diameter of the force limiting lever (3) is smaller than the inner diameter of the force limiting sleeve (2). The force limiting sleeve (2) is provided with a pressing slider (201) and a force limiting slider (301). The pressing slider (201) presses against the force limiting slider (301), and the force limiting slider (301) is in contact with one end of the force limiting lever. The pressing slider (201) is slidably connected to the inside of the force limiting sleeve (2), and the force limiting slider (301) is rotatably connected to the inside of the force limiting sleeve (2); A compression spring (202) is fixed inside the force limiting sleeve (2), and a sliding cavity is formed between the compression slider (201) and the force limiting sleeve (2). The compression spring (202) is located inside the sliding cavity and presses against the compression slider (201). The force-limiting lever (3) has a spring groove at one end near the force-limiting slider (301). A push block is provided in the spring groove. A slider spring (302) is provided between the push block and the spring groove. The push block presses against the force-limiting slider (301). The contact surface between the force-limiting slider (301) and the push block is an inclined surface. The force limiting sleeve (2) is provided with a lever limiting pin, and the force limiting lever (3) has a through hole that matches the lever limiting pin. The lever limiting pin is located inside the through hole. The force limiting sleeve (2) is provided with a slider limiting pin, and the force limiting slider (301) has a through hole that matches the slider limiting pin. The slider limiting pin is located inside the through hole. The pressing slider (201) is fixed with a pressure protrusion (20101) at one end near the force limiting slider (301), and the apex of the pressure protrusion (20101) is located on the side of the slider limiting pin opposite to the direction of the pulling force. The force limiting slider is equipped with a force limiting protrusion that matches the pressure protrusion.

2. The fixed vehicle tension control and adjustment device according to claim 1, characterized in that: The ratchet linkage includes a moving lever (4) and a fixed lever (5); The movable rod (4) of the force adjusting rod is slidably connected to the fixed rod (5) of the force adjusting rod. The movable rod (4) of the force adjusting rod and the fixed rod (5) of the force adjusting rod are in contact with each other. A portion of the force adjusting thread 1 is opened on the movable rod (4), and another portion of the force adjusting thread 2 corresponding to the force adjusting thread 1 is opened on the fixed rod (5). The force adjusting thread 1 and the force adjusting thread 2 form a complete force adjusting thread. The adjusting rod (4) is rotatably connected to the adjusting screw (6), and the adjusting screw (6) is threadedly connected to the complete adjusting thread.

3. The fixed vehicle tension control and adjustment device according to claim 2, characterized in that: The movable rod (4) of the force adjusting rod is fixedly provided with a movable locking pawl (401) that matches the fixed rod (5) of the force adjusting rod, and the fixed rod (5) of the force adjusting rod is fixedly provided with a fixed locking pawl (501) that matches the movable rod (4) of the force adjusting rod.

4. A fixed vehicle tension control and adjustment device according to claim 2, characterized in that: The outer side of the fixed rod (5) of the force adjustment rod is engraved with force adjustment scale, which covers the part between the moving rod (4) of the force adjustment rod and the fixed locking pawl (501).

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