A traction machine brake spring elastic force detection device

Abstract

The application provides a traction machine brake spring pressing elastic force detection device, which comprises a rack, a pressing mechanism, a detection mechanism, an adjusting mechanism and a positioning mechanism, the pressing mechanism is arranged on the upper part of the rack, a workbench is arranged on the lower part of the rack, the detection mechanism is arranged on the workbench and corresponds to the lower part of the pressing mechanism, and the positioning mechanism and the adjusting mechanism are arranged above the detection mechanism. The application uses a cylinder to compress a spring, has high speed and high efficiency; according to the working characteristics of the traction machine brake spring, the elastic force of the maximum height H1 and the minimum height H2 can be directly measured without calculation, the detection result is more intuitive, the influence of human calculation and other factors on the detection result is eliminated, and the detection precision is improved; the influence of the free height of the spring on the measurement is completely eliminated, manual detection of the free height of the spring before detection is not needed, the detection precision and efficiency are improved, and batch detection of the spring can be realized.

Description

Technical Field

[0001] This invention relates to the field of traction machine brakes, and in particular to a device for detecting the spring force of a traction machine brake. Background Technology

[0002] The traction brake is an important safety component in the elevator system. The brake has multiple compression springs inside. When the power is off, the brake pads are squeezed onto the brake wheel by the spring force to generate braking force. When the power is on and the brake is released, the brake generates an electromagnetic attraction force opposite to the spring force, the brake pads separate from the brake wheel, and the braking force disappears.

[0003] To ensure stable brake performance, the compression spring must possess appropriate elasticity to generate braking force. If the elasticity is too small, the braking force will be insufficient; if the elasticity is too large, the electromagnetic force will not be able to completely overcome the elasticity to separate the brake pads, and the brake will fail to open. Therefore, the height, elastic coefficient, and elasticity of the compression spring are crucial parameters. Elevators are special passenger-carrying devices, and the elevator traction mechanism brake is a vital functional and safety component of the elevator system. During production, it is essential to strengthen the inspection of the compression springs to ensure that all parameters meet design standards. Given the large quantity of compression springs used, an efficient and high-precision testing method is necessary to meet production demands.

[0004] The existing testing method uses a hydraulic tensile testing machine to compress the spring from its initial position to its final position. The tensile testing machine collects data in real time, and software plots the curves of displacement and pressure changes. Then, based on the free height of the compression spring, the spring force at the working height is calculated.

[0005] However, this method requires measuring the free height of the spring in advance to calculate the displacement distance and elastic force during testing. Furthermore, the tensile testing machine requires software to generate curve data, and the press head moves slowly. Since compression springs must be tested before leaving the factory, meaning springs tested after production must be tested again before leaving the factory, using a tensile testing machine severely impacts testing efficiency and cannot meet production needs. Summary of the Invention

[0006] To address the problems existing in the background art, the present invention proposes a device for detecting the spring force of a traction machine brake.

[0007] A traction machine brake spring force detection device includes a frame, a pressing mechanism, a detection mechanism, an adjustment mechanism, and a positioning mechanism. The pressing mechanism is located on the upper part of the frame, and a worktable is located on the lower part of the frame. The detection mechanism is located on the worktable and is correspondingly located below the pressing mechanism. The positioning mechanism and the adjustment mechanism are located above the detection mechanism.

[0008] Based on the above, the adjustment mechanism includes an arc-shaped bracket, a first adjusting block, a second adjusting block, and an adjusting screw. The arc-shaped bracket is mounted on the workbench and located above the detection mechanism. A first through hole is provided on the top of the arc-shaped bracket corresponding to the detection mechanism. The first adjusting block is slidably mounted on the top of the arc-shaped bracket. A strip-shaped second through hole is provided on the first adjusting block corresponding to the first through hole. A third through hole is provided on the second adjusting block corresponding to the first through hole. The upper part of the first adjusting block and the lower part of the second adjusting block are respectively provided with matching inclined surfaces. The second adjusting block is movably mounted on the first adjusting block. A threaded hole is provided on the top of the arc-shaped bracket. The adjusting screw movably passes through the threaded hole and is rotatably mounted on one end of the first adjusting block.

[0009] Based on the above, limit baffles are respectively provided on both ends of the bow-shaped bracket corresponding to the first adjusting block.

[0010] Based on the above, the positioning mechanism is a positioning cylinder, which is disposed at the bottom of the second adjusting block. The inner diameter of the positioning cylinder is equal to the diameter of the third through hole and is coaxially disposed with the third through hole. The positioning cylinder is movably inserted into the second through hole and the first through hole. The second adjusting block is movably placed on the first adjusting block.

[0011] Based on the above, the detection mechanism is a pressure sensor.

[0012] Based on the above, the top-pressing mechanism consists of a cylinder and a pneumatic rod.

[0013] Based on the above, the system includes an auxiliary cylinder, an auxiliary pneumatic rod, and a sliding plate. The sliding plate is slidably mounted on the top of the worktable, and the auxiliary cylinder is mounted on the frame. The auxiliary cylinder is driven and connected to the sliding plate through the auxiliary pneumatic rod. The detection mechanism, adjustment mechanism, and positioning mechanism are located on the top of the sliding plate.

[0014] This invention has outstanding substantive features and significant progress compared to existing technologies. Specifically, this invention uses a cylinder to compress the spring, which is fast and efficient. Targeting the working characteristics of the traction machine brake spring, it directly measures the spring force at the maximum height H1 and minimum height H2 without calculation, making the test results more intuitive and eliminating the influence of human calculation on the test results, thus improving test accuracy. It completely eliminates the influence of the spring's free height on the measurement, eliminating the need for manual measurement of the spring's free height before testing, improving test accuracy and efficiency, and enabling batch testing of springs. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a schematic diagram of the front structure of the present invention.

[0017] Figure 3This is a schematic diagram of the structure of the first adjusting block, the second adjusting block, and the bow-shaped bracket of the present invention.

[0018] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Pneumatic rod; 3. Compression spring; 4. Second adjusting block; 5. First adjusting block; 6. Bow-shaped bracket; 7. Pressure sensor; 8. Sliding plate; 9. Adjusting screw; 10. Auxiliary pneumatic rod; 11. Worktable; 12. Limiting baffle; 13. Sensor pressure head; 14. Third through hole; 15. Positioning cylinder; 16. Second through hole; 17. First through hole. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1-3 As shown, a traction machine brake spring force detection device includes a frame 1, a pressing mechanism, a detection mechanism, an adjustment mechanism, and a positioning mechanism. The pressing mechanism is located on the upper part of the frame 1, and a worktable 11 is located on the lower part of the frame 1. The detection mechanism is located on the worktable 11 and is correspondingly located below the pressing mechanism. The positioning mechanism and the adjustment mechanism are located above the detection mechanism.

[0021] In reality, the free height of the compression spring 3 is its height in its natural state, such as 48±0.5mm. When the brake is applied, the height H1 of the compression spring 3 is less than its free height, such as H1 being 45mm. When the brake is released (i.e., not braking), the height H2 of the compression spring 3 is less than H1, such as H2 being 44mm. During testing, only the pressure values ​​of the compression spring 3 at heights H1 and H2 need to be measured. Therefore, in use, the compression spring 3 is placed in the positioning mechanism, adjusted to the first position by the adjustment mechanism, and then the pressing mechanism moves downward and presses the compression spring 3 to measure the spring force value of the compression spring 3 at height H1. After releasing the pressing mechanism, the compression spring 3 is adjusted to the second position by the adjustment mechanism, and then the pressing mechanism moves downward and presses the compression spring 3 to measure the spring force value of the compression spring 3 at height H2. After releasing the pressing mechanism, the compression spring 3 is removed, completing the test. In this embodiment, the pressing mechanism is actually a cylinder and a pneumatic rod 2. Activating the cylinder controls the extension or retraction of the pneumatic rod 2, thereby pressing and releasing the compression spring 3. The detection mechanism is a pressure sensor 7. The sensor head 13 of the pressure sensor 7 is positioned at the bottom of the positioning mechanism. The bottom of the compression spring 3 contacts the pressure head of the pressure sensor 7. The pressure sensor 7 is electrically connected to the host computer. When the pressing mechanism presses down on the compression spring 3, the detection data from the pressure sensor 7 can be recorded and read on the host computer.

[0022] Specifically, the adjustment mechanism includes an arc-shaped bracket 6, a first adjusting block 5, a second adjusting block 4, and an adjusting screw 9. The arc-shaped bracket 6 is mounted on the workbench 11 with its arched portion positioned above the detection mechanism. The top of the arc-shaped bracket 6 has a first through hole 17 corresponding to the detection mechanism. The first adjusting block 5 is slidably mounted on the top of the arc-shaped bracket 6. The first adjusting block 5 has a strip-shaped second through hole 16 corresponding to the first through hole 17. The second adjusting block 4 has a third through hole 14 corresponding to the first through hole 17. The upper part of the first adjusting block 5 and the lower part of the second adjusting block 4 are respectively provided with matching inclined surfaces. The second adjusting block 4 is movably mounted on the first adjusting block 5. The top of the arc-shaped bracket 6 has a threaded hole, and the adjusting screw 9 is movably inserted into the threaded hole and rotatably mounted at one end of the first adjusting block 5. In practice, the positioning mechanism is a positioning cylinder 15, which is located at the bottom of the second adjusting block 4. The inner diameter of the positioning cylinder 15 is equal to the diameter of the third through hole 14 and is coaxially arranged with the third through hole 14. The positioning cylinder 15 is movably inserted into the second through hole 16 and the first through hole 17. The second adjusting block 4 is movably placed on the first adjusting block 5. Since the positioning cylinder 15 is located at the bottom of the second adjusting block 4 and is movably inserted into the first through hole 17, and the second through hole 16 on the first adjusting block 5 is elongated, when the first adjusting block 5 slides horizontally, it will not cause the second adjusting block 4 and the positioning cylinder 15 to move horizontally. That is, the compression spring 3 placed in the positioning cylinder 15 always remains in a vertical state. Since the top and bottom of the first adjusting block 5 are respectively set as matching inclined structures, the slope of the inclined surface in this embodiment is 1:10. After manually rotating the adjusting screw 9, due to the thread action, the adjusting screw 9 moves horizontally relative to the bow-shaped bracket 6, thereby driving the first adjusting block 5 to move horizontally on the bow-shaped bracket 6. The second adjusting block 4 does not move horizontally relative to the bow-shaped bracket 6 because the positioning cylinder 15 passes through the first through hole 17. Due to the effect of the inclined surface, when the first adjusting block 5 moves horizontally, the total height of the first adjusting block 5 and the second adjusting block 4 changes, thereby changing the height of the compression spring 3 placed in the positioning cylinder 15 above the second adjusting block 4. This causes the compression amount of the compression spring 3 to change when the pressing mechanism presses the compression spring 3 until it is flush with the upper surface of the second adjusting block 4.

[0023] In practice, the bow-shaped bracket 6 is provided with limit baffles 12 at both ends corresponding to the first adjusting block 5. The limit baffles 12 are used to limit the movement position of the first adjusting block 5. The positions of the two limit baffles 12 are set according to the two test heights of the test spring 3. That is, when the first adjusting block 5 contacts the first limit baffle 12, such as the left limit baffle 12, the test height of the compression spring 3 of the top pressing mechanism is the height H1. When the first adjusting block 5 contacts the second limit baffle 12, such as the right limit baffle 12, the test height of the compression spring 3 of the top pressing mechanism is the height H2.

[0024] Preferably, the traction machine brake spring 3 force detection device further includes an auxiliary cylinder, an auxiliary pneumatic rod 10, and a sliding plate 8. The sliding plate 8 is slidably mounted on the top of the worktable 11, and the auxiliary cylinder is mounted on the frame 1. The auxiliary cylinder is driven and connected to the sliding plate 8 through the auxiliary pneumatic rod 10. The detection mechanism, adjustment mechanism, and positioning mechanism are located on the top of the sliding plate 8. In reality, because the compression amount of the spring 3 is relatively small, such as 1mm, the detection mechanism and other components need frequent calibration and maintenance to ensure the accuracy of the detection equipment. Furthermore, the pressure head of the top pressure mechanism is close to the top of the second adjustment block 4, making maintenance inconvenient. Also, because the detection mechanism and other components are located below the pneumatic rod 2, a serious accident could occur if the pneumatic rod 2 malfunctions during maintenance. Therefore, the sliding plate 8 is automatically adjusted by the auxiliary cylinder and the auxiliary pneumatic rod 10, so that the detection mechanism and other components are shifted out of the top pressure mechanism during maintenance, which facilitates maintenance and ensures safety. After maintenance, the sliding plate 8 is moved back to the bottom of the top pressure mechanism.

[0025] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A device for detecting the spring force of a traction machine brake, characterized in that: The device includes a frame, a pressing mechanism, a detection mechanism, an adjusting mechanism, and a positioning mechanism. The pressing mechanism is located on the upper part of the frame, and a worktable is located on the lower part of the frame. The detection mechanism is located on the worktable and correspondingly below the pressing mechanism. The positioning mechanism and the adjusting mechanism are located above the detection mechanism. The adjusting mechanism includes an arc-shaped bracket, a first adjusting block, a second adjusting block, and an adjusting screw. The arc-shaped bracket is located on the worktable and above the detection mechanism. A first through hole is provided on the top of the arc-shaped bracket corresponding to the detection mechanism. The first adjusting block is slidably disposed on the top of the arc-shaped bracket. A first adjusting block has a strip-shaped second through hole corresponding to the first through hole, and a second adjusting block has a third through hole corresponding to the first through hole. The upper part of the first adjusting block and the lower part of the second adjusting block are respectively provided with matching inclined surfaces. The second adjusting block is movably mounted on the first adjusting block. The top of the bow-shaped bracket is provided with a threaded hole, and the adjusting screw is movably inserted into the threaded hole and rotatably mounted at one end of the first adjusting block. Limiting baffles are respectively provided at both ends of the bow-shaped bracket corresponding to the first adjusting block. The limiting baffles are used to limit the movement position of the first adjusting block, and the positions of the two limiting baffles are respectively set according to the two test heights of the test compression spring. The positioning mechanism is a positioning cylinder, which is located at the bottom of the second adjusting block. The inner diameter of the positioning cylinder is equal to the diameter of the third through hole and is coaxially arranged with the third through hole. The positioning cylinder is movably inserted into the second through hole and the first through hole. The second adjusting block is movably placed on the first adjusting block.

2. The traction machine brake spring force detection device according to claim 1, characterized in that: The detection mechanism is a pressure sensor.

3. The traction machine brake spring force detection device according to claim 1, characterized in that: The pressing mechanism consists of a cylinder and a pneumatic rod.

4. The traction machine brake spring force detection device according to claim 1, characterized in that: It includes an auxiliary cylinder, an auxiliary pneumatic rod, and a sliding plate. The sliding plate is slidably mounted on the top of the worktable. The auxiliary cylinder is mounted on the frame and is driven and connected to the sliding plate through the auxiliary pneumatic rod. The detection mechanism, adjustment mechanism, and positioning mechanism are located on the top of the sliding plate.

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