Wedge type expander and brake chamber performance detection test equipment
By setting up performance detection and testing equipment of force sensors and displacement sensors at the connection between the wedge dilator and the brake air chamber, the problem of difficulty in performance detection of the wedge dilator in the prior art is solved, and the performance measurement of the wedge dilator and the brake air chamber is achieved, thereby improving the reliability of the product.
Patent Information
- Application Number
- CN202422174104.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-05
- Publication Date
- 2025-06-17
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
It is difficult to effectively detect the performance of existing wedge expanders during use, resulting in the impact of the reliability and performance of the brakes.
A wedge dilator and brake air chamber performance testing equipment is designed. By setting a force sensor and a displacement sensor at the left and right ends of the wedge dilator and at the connection with the brake air chamber, synchronous measurement of the brake air chamber and the wedge dilator is achieved.
Through the use of this equipment, the displacement and output force of the brake air chamber and the wedge dilator can be measured simultaneously, ensuring the stable performance of the wedge dilator during use and improving the reliability of the product.
Smart Images
Figure CN222994002U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automotive braking, in particular to a performance detection test device for a wedge expander and a brake chamber. Background Art
[0002] In the industry, for heavy truck brake products - wedge brakes, compared with traditional cam drum brakes, a lightweight product solution is adopted. The wedge expander is used to replace parts such as the camshaft and self-adjusting arm of the traditional drum brake, achieving the purpose of high efficiency and lightweight. The wedge expander can independently adjust the clearance according to the wear conditions of the leading and trailing shoe friction linings. As the core component of the wedge brake, the wedge expander can transmit the pressure of the brake chamber to the brake shoe, generating a braking torque to achieve the braking purpose. Different expander structures produce different leverage ratios and different thrust magnitudes on the brake shoe. The self-adjusting performance of the expander is also crucial for the service performance of the brake. Summary of the Utility Model
[0003] The purpose of the utility model is to provide a performance detection test device for a wedge expander and a brake chamber in view of the deficiencies of the prior art, so as to ensure the performance of the wedge expander during use and improve the product reliability.
[0004] The utility model is implemented by adopting the following technical solutions:
[0005] A performance detection test device for a wedge expander and a brake chamber includes a wedge expander, a brake chamber and a test bench;
[0006] The wedge expander and the brake chamber are arranged on the test bench, the wedge expander is connected to the brake chamber, and force sensors and displacement sensors are arranged at both left and right ends of the wedge expander and at the connection between the wedge expander and the brake chamber.
[0007] Preferably, it further includes a transition device; transition devices are arranged on both left and right sides of the wedge expander, and the bottom of the transition device slides on the top of the test bench.
[0008] Preferably, it further includes a displacement adjustable device; there are two groups of displacement adjustable devices, and each group of displacement adjustable devices includes an L-shaped support base one and an electric cylinder; the outer side of the L-shaped support base one is connected to the extending end of the electric cylinder, and the bottom of the L-shaped support base one slides on the top of the test bench.
[0009] Preferably, it further includes a cylinder; the extending end of the cylinder penetrates through the L-shaped support base one and is detachably connected to the end of the transition device.
[0010] Preferably, a first force sensor and a first displacement sensor are respectively arranged on the first L-shaped support seat; a first displacement sensor pull plate is arranged at the end of the transition device, and the first displacement sensor is arranged between the first L-shaped support seat and the first displacement sensor pull plate.
[0011] Preferably, it further includes a second L-shaped support seat; the second L-shaped support seat is arranged near the brake air chamber of the wedge expander, and the bottom of the second L-shaped support seat slides on the top of the test bench.
[0012] Preferably, a second force sensor and a second displacement sensor are respectively arranged at the connection between the wedge expander and the brake air chamber; a second displacement sensor pull plate is arranged at the front end of the wedge expander, and the second displacement sensor is arranged between the brake air chamber and the second displacement sensor pull plate.
[0013] Preferably, a plurality of lead screws are arranged between the two first L-shaped support seats, and both ends are fixed by nuts.
[0014] Preferably, it further includes a hydraulic system booster cylinder; the pressure output port of the hydraulic system booster cylinder is connected to the hydraulic cylinder of the brake air chamber.
[0015] Preferably, it further includes an electronic display screen.
[0016] Compared with the prior art, the utility model has the following beneficial technical effects:
[0017] By arranging force sensors and displacement sensors at both the left and right ends of the wedge expander and at the connection between the wedge expander and the brake air chamber, the utility model can synchronously measure the displacement and output force of the brake air chamber and the displacement and output force of the wedge expander under a certain input air pressure of the brake air chamber, so as to ensure the performance of the wedge expander during use and improve the product reliability. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The following further describes the utility model with reference to the drawings:
[0019] Figure 1 It is a top view of the overall structure of the utility model;
[0020] Figure 2 It is a front view of the overall structure of the utility model.
[0021] Description of the reference numerals:
[0022] 1. Wedge expander; 2. Brake chamber; 3. Test bench; 4. L-shaped support base I; 41. Guide rail I; 5. Cylinder; 6. Electric cylinder; 7. Force sensor I; 8. Displacement sensor I; 81. Displacement sensor pull plate I; 9. L-shaped support base II; 91. Guide rail II; 10. Force sensor II; 11. Displacement sensor II; 111. Displacement sensor pull plate II; 12. Lead screw; 13. Transition device. Detailed implementation mode
[0023] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be described in detail below with reference to the drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "installed", "connected" should be understood in a broad sense. For example, it 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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.
[0024] Embodiment:
[0025] As Figure 1-2 shown: A performance detection test equipment for a wedge expander and a brake chamber, including a wedge expander 1, a brake chamber 2 and a test bench 3;
[0026] The test bench 3 is provided with a wedge expander 1 and a brake chamber 2. The wedge expander 1 is connected to the brake chamber 2. Force sensors and displacement sensors are provided at both left and right ends of the wedge expander 1 and at the connection between the wedge expander 1 and the brake chamber 2.
[0027] It also includes a transition device 13; Transition devices 13 are provided on both left and right sides of the wedge expander 1. The bottom of the transition device 13 slides on the top of the test bench 3; The transition device 13 can be replaced according to different specifications of the wedge expander 1; Preferably, the test bench 3 is provided with a chute or a slide rail that is slidably matched with the bottom of the transition device 13, and it is sufficient to meet the linear sliding requirement.
[0028] It also includes a displacement adjustable device; There are two groups of displacement adjustable devices. Each group of displacement adjustable devices includes an L-shaped support base I 4 and an electric cylinder 6; The outside of the L-shaped support base I 4 is connected to the extending end of the electric cylinder 6. The bottom of the L-shaped support base I 4 slides on the top of the test bench 3; Preferably, a guide rail I 41 is provided on the test bench 3, and the L-shaped support base I 4 slides linearly in the guide rail I 41.
[0029] It also includes a cylinder 5; the extending end of the cylinder 5 penetrates through the first L-shaped support seat 4 and is detachably connected to the end of the transition device 13; preferably, the cylinder 5 is a thin cylinder; the cylinder 5 can press the transition device 13 against the wedge expander 1, and can simulate a return spring during braking return, prompting the push rods at both ends of the wedge expander 1 to return. When the wedge expander 1 is reset, it is ejected by the cylinder 5 to reset the top seat of the wedge expander 1 and the wedge expander 1 together. At the same time, the first displacement sensor 8 feeds back the displacement.
[0030] A first force sensor 7 and a first displacement sensor 8 are respectively arranged on the first L-shaped support seat 4; a displacement sensor pull plate 81 is arranged on the end of the transition device 13, and the first displacement sensor 8 is arranged between the first L-shaped support seat 4 and the displacement sensor pull plate 81; when the wedge expander 1 extends under force, it pushes the first displacement sensor 8 to measure the displacement; at the same time, the force is transmitted to the force measuring sensor through the wedge expander 1 to measure the output force.
[0031] It also includes a second L-shaped support seat 9; a second L-shaped support seat 9 is arranged near the brake chamber 2 of the wedge expander 1, and the bottom of the second L-shaped support seat 9 slides on the top of the test bench 3; preferably, a second guide rail 91 is arranged on the test bench 3, and the second L-shaped support seat 9 slides linearly in the second guide rail 91.
[0032] A second force sensor 10 and a second displacement sensor 11 are respectively arranged at the connection between the wedge expander 1 and the brake chamber 2; a displacement sensor pull plate 111 is arranged at the front end of the wedge expander 1, and the second displacement sensor 11 is arranged between the brake chamber 2 and the displacement sensor pull plate 111; the output force and displacement of the brake chamber 2 under a certain air pressure can be detected.
[0033] A plurality of lead screws 12 are arranged between the two first L-shaped support seats 4 and are uniformly fixed by nuts at both ends; preferably, the number of lead screws 12 is four; when the extending displacement of the wedge expander 1 needs to be adjusted, loosen the nuts on the lead screws 12, then loosen the nuts of the first L-shaped support seat 4, and then drive it to move through the electric cylinder 6. When the position is adjusted, lock the nuts of the first L-shaped support seat 4 and then lock the nuts on the lead screws 12 to end the adjustment of the extending displacement of the wedge expander 1; it is applicable to the operation of wedge expanders 1 of different specifications.
[0034] It also includes a hydraulic system booster cylinder; the pressure output port of the hydraulic system booster cylinder is connected to the hydraulic cylinder of the brake chamber 2; it is used to provide a power source for the brake chamber 2.
[0035] It also includes an electronic display screen; preferably, the electronic device can be a computer, which can calculate and draw the curves of the displacement and output force of the brake chamber and the displacement and output force of the wedge expander when the wedge expander 1 of different specifications works, and can intuitively detect the working performance of the wedge expander 1.
[0036] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claimed claim.
[0037] As described above, the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims
1. A wedge-type expander and brake air chamber performance testing equipment, characterized in that: It comprises a wedge-type expander (1), a brake air chamber (2) and a test bench (3); The test bench (3) is provided with a wedge-type expander (1) and a brake air chamber (2), the wedge-type expander (1) and the brake air chamber (2) are connected, and force sensors and displacement sensors are provided at the left and right ends of the wedge-type expander (1) and at the connection between the wedge-type expander (1) and the brake air chamber (2).
2. The wedge-type expander and brake chamber performance testing equipment according to claim 1, characterized in that: It also includes a transition device (13); the left and right sides of the wedge-type expander (1) are both provided with transition devices (13), and the bottom of the transition device (13) slides on the top of the test bench (3).
3. The wedge-type expander and brake chamber performance testing equipment as claimed in claim 2, characterized in that: It also includes a displacement adjustable device; the displacement adjustable device is provided in two groups, each group of the displacement adjustable device includes an L-shaped support seat (4) and an electric cylinder (6); the outer side of the L-shaped support seat (4) is connected to the protruding end of the electric cylinder (6), and the bottom of the L-shaped support seat (4) slides on the top of the test bench (3).
4. The wedge-type expander and brake chamber performance testing equipment as claimed in claim 3, characterized in that: It also includes a cylinder (5); the extended end of the cylinder (5) passes through the L-shaped support seat (4) and is detachably connected to the end of the transition device (13).
5. The wedge-type expander and brake chamber performance testing equipment as claimed in claim 4, characterized in that: A force sensor (7) and a displacement sensor (8) are respectively arranged on the L-shaped support seat (4); a displacement sensor pull plate (81) is arranged on the end of the transition piece (13); and the displacement sensor (8) is arranged between the L-shaped support seat (4) and the displacement sensor pull plate (81).
6. The wedge-type expander and brake chamber performance testing equipment as claimed in claim 5, characterized in that: It also includes an L-shaped support seat 2 (9); the wedge-type expander (1) is provided with an L-shaped support seat 2 (9) near the brake air chamber (2), and the bottom of the L-shaped support seat 2 (9) slides on the top of the test bench (3).
7. The wedge-type expander and brake chamber performance testing equipment according to claim 6, characterized in that: A force sensor 2 (10) and a displacement sensor 2 (11) are respectively arranged at the connection between the wedge-type expander (1) and the brake air chamber (2); a displacement sensor pull plate 2 (111) is arranged at the front end of the wedge-type expander (1), and the displacement sensor 2 (11) is arranged between the brake air chamber (2) and the displacement sensor pull plate 2 (111).
8. The wedge-type expander and brake chamber performance testing equipment as claimed in claim 3, characterized in that: A plurality of lead screws (12) are arranged between the two L-shaped support seats (4), and both ends are fixed by nuts.
9. The wedge-type expander and brake chamber performance testing equipment according to claim 1, characterized in that: It also comprises a hydraulic system booster cylinder; the pressure output port of the hydraulic system booster cylinder is connected to the hydraulic cylinder of the brake air chamber (2).
10. The wedge-type expander and brake chamber performance testing equipment according to claim 1, characterized in that: Also includes an electronic display screen.