Dynamic test equipment for drum brake

Abstract

The invention discloses a dynamic test device for a drum brake, and relates to the technical field of brake testing, and the dynamic test device comprises a cabinet body, the right side of the inner cavity of the cabinet body is fixedly provided with a driving assembly, the left side of the lower surface of the inner cavity of the cabinet body is fixedly provided with a dynamic test assembly, and the front side of the cabinet body is movably connected with two cabinet doors. A drum brake assembly is arranged on the left side of the driving assembly, a base is fixedly installed on the lower surface of the cabinet body, and the drum brake assembly comprises a fixing part and a brake drum. According to the invention, the force sensor and the first sleeve are installed through screws, so that the force sensor is convenient to maintain or replace, the displacement sensor and the cabinet body are installed through screws, so that the displacement sensor is convenient to maintain or replace, and the connecting rod and the second sleeve are installed through screws, so that the second sleeve is more flexible and convenient to disassemble and assemble; drum brakes of different types, specifications and sizes can be tested conveniently, and the application range is wide.

Description

Technical Field

[0001] The invention relates to the technical field of brake testing, and in particular to a dynamic testing device for a drum brake. Background Art

[0002] Drum brakes use brake transmission mechanisms to make brake shoes press brake friction plates against the inside of brake drums, thereby generating braking force. They can be used as zero-position locking of mechanical systems to prevent erroneous system movement, deflection, or fault locking in emergency situations, and prevent abnormal system operation. Brakes are very important safety components in elevators, and their operational reliability directly affects the safety of elevator passengers. In order to ensure the performance of the brakes, dynamic testing equipment is required to accurately test the dynamic performance of the brakes.

[0003] The existing technology has the following problems: The common dynamic testing equipment in the market today is not convenient for disassembling test devices such as displacement sensors and force sensors during use, which makes it inconvenient to repair or replace them. It is also not convenient for testing drum brakes of certain specifications, and its scope of application is limited. In addition, the stability of the test equipment during use is poor, which is not conducive to brake testing. Summary of the invention

[0004] The present invention provides a dynamic performance testing device for a drum brake to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: A dynamic test device for a drum brake comprises a cabinet, a drive assembly is fixedly mounted on the right side of the cabinet inner cavity, a dynamic test assembly is fixedly mounted on the left side of the lower surface of the cabinet inner cavity, two cabinet doors are movably connected to the front side of the cabinet, a drum brake assembly is arranged on the left side of the drive assembly, a base is fixedly mounted on the lower surface of the cabinet, and the drum brake assembly comprises a fixed part and a brake drum.

[0006] The dynamic test component includes a brake spring cylinder, the lower surface of which is fixedly installed on the left side of the lower surface of the cabinet body cavity, a U-shaped connecting fork is fixedly installed on the output end of the brake spring cylinder, a connecting rod is fixedly installed between the through holes of the connecting fork, a displacement sensor is fixedly installed on the upper left side of the cabinet body cavity, the brake spring cylinder includes a cylinder body and a push rod, the displacement sensor includes a main body and a steel cable, a force sensor is sleeved on the outer surface of the top of the push rod, one end of the steel cable is connected to the main body, and the other end is fixedly installed on the top of the connecting rod, and a sleeve 2 is fixedly installed on the left end of the fixed part by a screw.

[0007] The driving assembly comprises a mounting plate, which is fixedly mounted on the right side of the brake drum by means of screws, and a motor is fixedly mounted on the right end of the mounting plate by means of screws.

[0008] Preferably, the base is in a T-shaped structure, and threaded holes are provided on both the left and right sides of the upper surface of the bottom of the base.

[0009] Preferably, a non-slip pad is bonded to the lower surface of the base, and the material of the non-slip pad is rubber.

[0010] Preferably, the main body is fixed to the upper left side of the cabinet inner cavity by screws, the cylinder body is screwed to the left side of the lower surface of the cabinet inner cavity, and the upper end of the push rod is fixed to the lower surface of the connecting fork by bolts.

[0011] Preferably, a sleeve 1 is fixedly installed on the outer surface of the top of the push rod, and the cross-section of the sleeve 1 is a T-shaped structure.

[0012] Preferably, the force sensor is sleeved on the outer surface of the top of the sleeve one, and the bottom of the sleeve one and the force sensor are fixedly mounted by screws.

[0013] Preferably, the cross-section of the second sleeve is a T-shaped structure, and a circular groove is provided at the right end of the second sleeve, and the right end of the connecting rod and the left end of the second sleeve are fixedly installed by screws.

[0014] Preferably, an electric push rod is fixedly installed on the lower right side of the inner cavity of the cabinet by screws, a bracket is fixedly installed on the output end of the electric push rod, the bracket is in a "X" shape, and the motor is fixedly installed on the left side of the top of the bracket by screws.

[0015] Preferably, sliders are fixedly installed on the front and rear sides of the lower surface of the bracket, and sliding grooves are opened at the front and rear positions of the right side of the lower surface of the inner cavity of the cabinet. The inner surface of the sliding groove is slidably connected to the outer surface of the sliding slide, and the sliding groove and the sliding slide are both T-shaped structures.

[0016] Due to the adoption of the above technical solution, the present invention has the following technical advances compared with the prior art: The invention provides a dynamic performance testing device for a drum brake. The device monitors the movement of a push rod in real time through a force sensor and a displacement sensor, including the displacement and thrust change of the push rod, so as to realize the dynamic performance test of the brake and help optimize the design and use of the brake. The force sensor is installed with a first sleeve through screws, so as to facilitate the repair or replacement of the force sensor. The displacement sensor is installed with a cabinet through screws, so as to facilitate the repair or replacement of the displacement sensor. The connecting rod is installed with a second sleeve through screws, so as to make the disassembly and assembly of the second sleeve more flexible and convenient, so as to facilitate the testing of drum brakes of different types, specifications and sizes. The device has a wide range of applications. The push rod and the force sensor are protected by arranging a first sleeve made of rubber material to prevent external interference or damage during the test, and the stability of the push rod during the braking process can be ensured, so as to improve the accuracy and reliability of the test.

[0017] The present invention provides a dynamic testing device for a drum brake, which drives the brake drum to rotate through a motor mounting plate, and can change the dynamic characteristics of the brake by controlling and collecting parameters such as the frequency and current of the motor, thereby obtaining the dynamic braking torque of the brake at this speed. The measurement is accurate and high in precision. The bracket is driven to move by an electric push rod, and the brake drum and the mounting plate are fixed by screws, so that drum brakes of different thicknesses can be tested, and the stability of the bracket movement is ensured by a slider and a slide groove.

[0018] The present invention provides a dynamic test device for a drum brake. The installation of the test device is more flexible and the use is more convenient through a T-shaped base. An anti-skid pad is provided to achieve an anti-skid effect, thereby ensuring the stability of the device when placed, which is beneficial to the normal conduct of the brake test. When the device is not in use, the cooperation of a cabinet, a base and a cabinet door can achieve a dust-proof protection effect for a dynamic test component and a drive component, thereby preventing dust and the like from adhering to the test device and affecting the test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is another perspective structural schematic diagram of the present invention; Figure 3 It is a partial cross-sectional structural schematic diagram of the present invention; Figure 4 It is a schematic diagram of the structure of the dynamic test component of the present invention; Figure 5 It is a schematic diagram of the second cross-sectional structure of the casing of the present invention; Figure 6 It is a schematic diagram of the connecting fork structure of the present invention; Figure 7 It is a schematic cross-sectional structural diagram of a sleeve of the present invention; Figure 8It is a schematic diagram of the structure of the driving component of the present invention.

[0020] In the figure: 1. cabinet; 2. base; 3. anti-skid pad; 4. drive assembly; 41. electric push rod; 42. bracket; 43. motor; 44. mounting plate; 45. slider; 5. drum brake assembly; 51. fixed part; 52. brake drum; 6. dynamic test assembly; 61. brake spring cylinder; 601. cylinder body; 602. push rod; 62. displacement sensor; 621. main body; 622. steel cable; 63. sleeve one; 64. force sensor; 65. connecting fork; 66. connecting rod; 67. sleeve two; 7. cabinet door; 8. slide groove. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0022] like Figure 1-Figure 8 As shown, a dynamic test device for a drum brake comprises a cabinet 1, a driving component 4 is fixedly installed on the right side of the inner cavity of the cabinet 1, a dynamic test component 6 is fixedly installed on the left side of the lower surface of the inner cavity of the cabinet 1, two cabinet doors 7 are movably connected to the front side of the cabinet 1, a drum brake assembly 5 is arranged on the left side of the driving component 4, a base 2 is fixedly installed on the lower surface of the cabinet 1, the drum brake assembly 5 comprises a fixed part 51 and a brake drum 52, the dynamic test component 6 comprises a brake spring cylinder 61, the lower surface of the brake spring cylinder 61 is fixedly installed with the left side of the lower surface of the inner cavity of the cabinet 1, and a U-shaped connecting fork 65 is fixedly installed at the output end of the brake spring cylinder 61, and the connecting fork 65 is connected to the output end of the brake spring cylinder 61. A connecting rod 66 is fixedly installed between the through holes of the fork 65, a displacement sensor 62 is fixedly installed on the upper left side of the inner cavity of the cabinet 1, the brake spring cylinder 61 includes a cylinder body 601 and a push rod 602, the displacement sensor 62 includes a main body 621 and a steel cable 622, and a force sensor 64 is sleeved on the outer surface of the top of the push rod 602, one end of the steel cable 622 is connected to the main body 621, and the other end is fixedly installed on the top of the connecting rod 66, the left end of the fixed part 51 is fixedly installed with a sleeve 2 67 by screws, the drive assembly 4 includes a mounting plate 44, the mounting plate 44 is fixedly installed on the right side of the brake drum 52 by screws, and the right end of the mounting plate 44 is fixedly installed with a motor 43 by screws.

[0023] When in use, the drum brake assembly 5 is sleeved on the second sleeve 67, and the second sleeve 67 and the fixed part 51 are fixed by screws, the cabinet door 7 is closed, and the input of the motor 43 is adjusted so that the rotating shaft of the motor 43 rotates smoothly at a certain speed, thereby driving the brake drum 52 to rotate through the motor 43 and the mounting plate 44, and then reading the voltage, current and other parameters fed back by the motor 43 driving the drum brake assembly 5, and then according to the known motor parameters, the dynamic braking torque of the brake at this speed can be calculated, and the measurement is accurate and high in precision. When braking occurs, the push rod 602 is subjected to thrust, and the force sensor 64 converts this thrust into an electrical signal for transmission, thereby realizing accurate measurement of the thrust. 2 moves, the steel cable 622 expands and contracts accordingly, and the displacement sensor 62 measures the displacement of the push rod 602 by detecting the elongation or shortening of the steel cable 622, thereby simulating the braking process of the whole vehicle and realizing the dynamic performance test of the brake, which is helpful to optimize the design and use of the brake. The dynamic characteristics of the brake can be changed by controlling and collecting the frequency, current and other parameters of the motor 43. The displacement sensor 62 is installed between the cabinet 1 by screws, which is convenient for repairing or replacing the displacement sensor 62. When the device is not used, the cabinet 1, the base 2, and the cabinet door 7 cooperate to provide dust protection for the dynamic test component 6 and the drive component 4, so as to prevent dust from adhering to the test equipment and affecting the test accuracy.

[0024] like Figure 1-Figure 8 As shown, the base 2 is in a T-shaped structure, and threaded holes are provided on the left and right sides of the upper surface of the bottom of the base 2.

[0025] The threaded holes on the T-shaped base 2 make the installation of the test equipment more flexible and the use more convenient. When the equipment is not in use, the cabinet 1, the base 2, and the cabinet door 7 cooperate to provide dust-proof protection for the dynamic test component 6 and the drive component 4, thereby preventing dust from adhering to the test equipment and affecting the test accuracy.

[0026] like Figure 1-Figure 8 As shown, a non-slip pad 3 is bonded to the lower surface of the base 2, and the material of the non-slip pad 3 is rubber.

[0027] The anti-skid pad 3 is provided to prevent skidding, thereby ensuring the stability of the device when placed, and facilitating the normal conduct of the brake test.

[0028] like Figure 1-Figure 8 As shown, the main body 621 is fixed to the upper left side of the inner cavity of the cabinet 1 by screws, the cylinder body 601 is fixed to the left side of the lower surface of the inner cavity of the cabinet 1 by screws, and the upper end of the push rod 602 is fixed to the lower surface of the connecting fork 65 by bolts.

[0029] The main body 621 is installed with the cabinet 1 by screws, which is convenient for repairing or replacing the displacement sensor 62; the cylinder body 601 is installed with the cabinet 1 by screws, which is convenient for repairing or replacing the brake spring cylinder 61; the push rod 602 and the connecting fork 65 are installed with screws, making the disassembly of the connecting fork 65 more flexible.

[0030] like Figure 1-Figure 8 As shown, a sleeve 63 is fixedly installed on the top outer surface of the push rod 602, and the cross-section of the sleeve 63 is a T-shaped structure. The force sensor 64 is sleeved on the outer surface of the top of the sleeve 63, and the bottom of the sleeve 63 is fixed to the force sensor 64 by screws.

[0031] A rubber sleeve 63 is provided to protect the push rod 602 and the force sensor 64 to prevent external interference or damage during the test, and to ensure the stability of the push rod 602 during the braking process, thereby improving the accuracy and reliability of the test. The sleeve 63 and the force sensor 64 are installed with screws to facilitate the maintenance or replacement of the force sensor 64.

[0032] like Figure 1-Figure 8 As shown, the cross-section of the second sleeve 67 is a T-shaped structure, and a circular groove is provided at the right end of the second sleeve 67. The right end of the connecting rod 66 and the left end of the second sleeve 67 are fixedly installed by screws.

[0033] The connecting rod 66 and the second sleeve 67 are installed by screws, so that the disassembly and assembly of the second sleeve 67 is more flexible and convenient, and it is convenient to test drum brakes of different types, specifications and sizes, and has a wide range of applications.

[0034] like Figure 1-Figure 8 As shown, an electric push rod 41 is fixedly installed on the lower right side of the inner cavity of the cabinet 1 by screws, and a bracket 42 is fixedly installed on the output end of the electric push rod 41. The bracket 42 is a "X"-shaped structure, and the motor 43 is fixedly installed on the left side of the top of the bracket 42 by screws.

[0035] The electric push rod 41 is installed with the cabinet 1 by screws, so that the disassembly and assembly of the electric push rod 41 is more flexible and convenient. A bracket 42 is provided to support the motor 43.

[0036] like Figure 1-Figure 3 , Figure 8 As shown, sliders 45 are fixedly installed on the front and rear sides of the lower surface of the bracket 42, and slide grooves 8 are opened at the front and rear positions of the right side of the lower surface of the inner cavity of the cabinet 1. The inner surface of the slide groove 8 is slidably connected to the outer surface of the slider 45, and the slide groove 8 and the slider 45 are both T-shaped structures.

[0037] The stability of the movement of the bracket 42 is ensured by the slider 45 and the slide groove 8 .

[0038] The working principle of the present invention is as follows: when in use, the screw is rotated into the threaded hole on the base 2 to fix it, and then the drum brake assembly 5 is sleeved on the second sleeve 67, and the second sleeve 67 and the fixed part 51 are fixed by screws, and the bracket 42 is driven to move by the electric push rod 41, and then the brake drum 52 and the mounting plate 44 are fixed by screws, and the cabinet door 7 is closed, and the input of the motor 43 is adjusted so that the shaft of the motor 43 rotates smoothly at a certain speed, thereby driving the brake drum 52 to rotate through the motor 43 and the mounting plate 44, and then reading the voltage and electric feedback of the motor 43 driving the drum brake assembly 5 The dynamic braking torque of the brake at this speed can be calculated based on the known motor parameters. The measurement is accurate and precise. When braking occurs, the push rod 602 is acted upon by thrust, and the force sensor 64 converts the thrust into an electrical signal for transmission, thereby achieving accurate measurement of the thrust. When the push rod 602 moves, the steel cable 622 expands and contracts accordingly. The displacement sensor 62 measures the displacement of the push rod 602 by detecting the elongation or shortening of the steel cable 622, thereby simulating the braking process of the entire vehicle and achieving dynamic performance testing of the brake, which is helpful for optimizing the design and use of the brake and can be used. The frequency, current and other parameters of the motor 43 are controlled and collected to change the dynamic characteristics of the brake. The force sensor 64 is installed with the sleeve 1 63 by screws, which is convenient for repairing or replacing the force sensor 64. The displacement sensor 62 is installed with the cabinet 1 by screws, which is convenient for repairing or replacing the displacement sensor 62. The connecting rod 66 is installed with the sleeve 2 67 by screws, which makes the disassembly and assembly of the sleeve 2 67 more flexible and convenient, and is convenient for testing drum brakes of different types, specifications and sizes. The application range is wide, and the push rod 602 and the force sensor 64 are protected by setting the sleeve 1 63 made of rubber. The sensor 64 can prevent external interference or damage during the test, and can also ensure the stability of the push rod 602 during the braking process, so as to improve the accuracy and reliability of the test. The slider 45 and the slide groove 8 can ensure the stability of the movement of the bracket 42. The anti-skid pad 3 is provided to play an anti-skid effect, thereby ensuring the stability of the device when placed, which is conducive to the normal progress of the brake test. When the device is not in use, the cabinet 1, the base 2, and the cabinet door 7 cooperate to provide dust protection for the dynamic test component 6 and the drive component 4, thereby preventing dust from adhering to the test equipment and affecting the test accuracy.

[0039] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A dynamic performance test device for a drum brake, comprising a cabinet (1), characterized in that: A drive assembly (4) is fixedly mounted on the right side of the inner cavity of the cabinet (1), a dynamic test assembly (6) is fixedly mounted on the left side of the lower surface of the inner cavity of the cabinet (1), two cabinet doors (7) are movably connected to the front side of the cabinet (1), a drum brake assembly (5) is arranged on the left side of the drive assembly (4), a base (2) is fixedly mounted on the lower surface of the cabinet (1), and the drum brake assembly (5) includes a fixed portion (51) and a brake drum (52); The dynamic test assembly (6) comprises a brake spring cylinder (61), the lower surface of the brake spring cylinder (61) is fixedly mounted to the left side of the lower surface of the inner cavity of the cabinet (1), a U-shaped connecting fork (65) is fixedly mounted on the output end of the brake spring cylinder (61), a connecting rod (66) is fixedly mounted between the through holes of the connecting fork (65), a displacement sensor (62) is fixedly mounted on the upper left side of the inner cavity of the cabinet (1), the brake spring cylinder (61) comprises a cylinder body (601) and a push rod (602), the displacement sensor (62) comprises a main body (621) and a steel cable (622), a force sensor (64) is sleeved on the outer surface of the top of the push rod (602), one end of the steel cable (622) is connected to the main body (621), and the other end is fixedly mounted to the top of the connecting rod (66), and a sleeve 2 (67) is fixedly mounted on the left end of the fixed part (51) by means of a screw; The drive assembly (4) comprises a mounting plate (44), the mounting plate (44) being fixedly mounted on the right side of the brake drum (52) by means of screws, and a motor (43) being fixedly mounted on the right end of the mounting plate (44) by means of screws.

2. The dynamic performance testing device for drum brakes according to claim 1, characterized in that: The base (2) is in a T-shaped structure, and threaded holes are provided on both the left and right sides of the upper surface of the bottom of the base (2).

3. The dynamic performance testing device for drum brakes according to claim 1, characterized in that: An anti-skid pad (3) is bonded to the lower surface of the base (2), and the material of the anti-skid pad (3) is rubber.

4. The dynamic performance testing device for drum brakes according to claim 1, characterized in that: The main body (621) is fixed to the upper left side of the inner cavity of the cabinet (1) by means of screws, the cylinder body (601) is fixed to the left side of the lower surface of the inner cavity of the cabinet (1) by means of screws, and the upper end of the push rod (602) is fixed to the lower surface of the connecting fork (65) by means of bolts.

5. The dynamic performance testing device for drum brakes according to claim 1, characterized in that: A sleeve 1 (63) is fixedly mounted on the outer surface of the top of the push rod (602), and the cross section of the sleeve 1 (63) is a T-shaped structure.

6. The dynamic performance testing device for drum brakes according to claim 5, characterized in that: The force sensor (64) is sleeved on the outer surface of the top of the sleeve one (63), and the bottom of the sleeve one (63) and the force sensor (64) are fixedly mounted by means of screws.

7. The dynamic performance testing equipment for drum brakes according to claim 1, characterized in that: The cross-section of the second sleeve (67) is a T-shaped structure, and a circular groove is provided at the right end of the second sleeve (67). The right end of the connecting rod (66) and the left end of the second sleeve (67) are fixedly mounted by screws.

8. The dynamic performance testing device for drum brakes according to claim 1, characterized in that: An electric push rod (41) is fixedly mounted on the lower right side of the inner cavity of the cabinet (1) by means of screws, a bracket (42) is fixedly mounted on the output end of the electric push rod (41), the bracket (42) is in a "X"-shaped structure, and the motor (43) is fixedly mounted on the left side of the top of the bracket (42) by means of screws.

9. The dynamic performance testing device for drum brakes according to claim 8, characterized in that: Slide blocks (45) are fixedly mounted on the front and rear sides of the lower surface of the bracket (42), and slide grooves (8) are provided at the front and rear positions of the right side of the lower surface of the inner cavity of the cabinet (1), the inner surface of the slide groove (8) is slidably connected to the outer surface of the slide block (45), and the slide groove (8) and the slide block (45) are both T-shaped structures.

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