Clutch load control module and tightening tool torque calibration system

Abstract

The utility model discloses a clutch load control module and tightening tool torque calibration system, which comprises a hydraulic control assembly and a hydraulic clutch, the hydraulic control assembly comprises a circulating oil tank, a low-pressure oil cylinder, a servo motor and a control unit, the piston divides the low-pressure oil cylinder into an oil outlet cavity and an oil return cavity, the oil outlet cavity is communicated with an oil inlet of the hydraulic clutch through an oil outlet pipeline, the oil return cavity is connected with an oil return pipeline A, a pressure sensor is arranged on the oil outlet pipeline, and the servo motor and the pressure sensor are both in communication connection with the control unit. The servo motor is used for driving the piston to linearly move in the low-pressure oil cylinder. On the one hand, accurate control over the working load of the hydraulic clutch can be achieved, more low-pressure control use occasions can be met, on the other hand, fine calibration of the tightening working torque can be achieved by means of the tightening tool torque calibration system and method, and high calibration precision and efficiency are achieved.

Description

Technical Field

[0001] This utility model relates to the field of ballast control technology, specifically to a clutch load control module and a tightening tool torque calibration system. Background Technology

[0002] Torque calibration of tightening tools is of paramount importance, primarily in ensuring operational safety, guaranteeing assembly quality, improving equipment reliability, and meeting metrological traceability requirements. Traditional torque calibration methods generally employ direct hard-contact measurement, such as patent number 2015205118809, entitled "Torque Wrench Calibration Device Including Digital Display Device." This patent connects a gear shift reducer to an operating handle or motor via a gear shift lever, enabling both manual and automatic calibration of the torque wrench. By cross-checking manual and automatic calibration, the accuracy of the torque wrench calibration is effectively improved.

[0003] The applicant found in the research that the accuracy of the calibration results of this type of calibration method is not good. In actual process, the torque is often a gradual process. In particular, when the tightened workpiece is used with shims, springs and other materials, the actual torque generated will also change. Therefore, it is urgent to make further improvements to the current related equipment and methods. Utility Model Content

[0004] In view of this, the present invention provides a clutch load control module and a tightening tool torque calibration system to solve the problem of poor torque calibration accuracy of tightening tools in the prior art.

[0005] The technical solution is as follows:

[0006] A clutch load control module, the key features of which are: a hydraulic control component and a hydraulic clutch, wherein the hydraulic control component includes a circulating oil tank, a low-pressure oil cylinder, a servo motor and a control unit, wherein the low-pressure oil cylinder has a piston, the piston divides the low-pressure oil cylinder into an oil outlet chamber and an oil return chamber, the oil outlet chamber is connected to the oil inlet of the hydraulic clutch through an oil outlet line, the oil return chamber is connected to a oil return line A, a pressure sensor is installed on the oil outlet line, the servo motor and the pressure sensor are both communicatively connected to the control unit, and the servo motor is used to drive the piston to move linearly in the low-pressure oil cylinder.

[0007] By adopting the above solution, the working friction of the hydraulic clutch can be precisely controlled through the servo motor during use, thus providing a more precise torque control strategy for the drive plate. This is especially suitable for low oil pressure control and meets more testing requirements.

[0008] Preferably, a solenoid valve is installed on the oil outlet line, and the solenoid valve is communicatively connected to the control unit. This design facilitates automated control and improves response speed.

[0009] Preferably, a replenishing oil line is connected between the oil outlet chamber and the circulating oil tank, and a return oil line B is connected between the oil outlet of the hydraulic clutch and the circulating oil tank. This design allows for the repeated recycling of hydraulic oil, improving utilization efficiency and facilitating subsequent clutch evacuation operations.

[0010] Preferably, the circulating oil tank, low-pressure cylinder, and servo motor are all mounted on a mounting plate. This design facilitates modular installation and improves assembly / disassembly efficiency.

[0011] A torque calibration system for tightening tools, the key features of which are: a worktable and the aforementioned clutch load control module, wherein the clutch load control module is mounted on the worktable, an adapter is detachably mounted on the drive disc of the hydraulic clutch, the adapter has a socket adapted to the tightening tool to be calibrated, and a torque sensor for measuring its real-time torque is provided on the hydraulic clutch, the torque sensor being communicatively connected to the control unit.

[0012] By adopting the above scheme, the process of gradually increasing torque during tightening is simulated by using the hydraulic clutch pressurization process. Combined with the precise control of hydraulic pressure by the servo motor, the tightening condition is realistically and accurately simulated, which helps to improve the accuracy of calibration results and avoids damage to tightening tools.

[0013] Preferably, the workbench has a bottom platform, a middle platform, and an operating platform arranged sequentially from bottom to top. The hydraulic control component is mounted on the bottom platform, the hydraulic clutch is mounted on the middle platform, and the operating platform has multiple through holes for exposing the insertion holes. This design results in a more rational overall layout, with the center of gravity lowered, making it more stable and reliable, and capable of meeting the calibration and testing requirements of various tightening tools.

[0014] Preferably, the operating table surface has stop components that correspond one-to-one with the through holes. These stop components prevent accidental injury caused by handle swinging, thus reducing the risk of damage during use.

[0015] Preferably, the operating table has positioning elements that correspond one-to-one with the through holes, the adapter is fitted with a bearing, the positioning elements are fixed to the operating table and are fixedly connected to the outer ring of the corresponding bearing, and the adapter is higher than the upper surface of the positioning elements. By adopting the above solution, the end of the hydraulic clutch drive disc is relatively fixed without hindering the normal rotation of the adapter, reducing sway or shaking, which is beneficial to further improving the accuracy of torque measurement.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] The clutch load control module and tightening tool torque calibration system provided by this utility model can achieve precise control of the working load of the hydraulic clutch, meeting more low-pressure control applications. On the other hand, the tightening tool torque calibration system and method can achieve fine calibration of the tightening working torque, with high calibration accuracy and efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the torque calibration system for the tightening tool of this utility model;

[0019] Figure 2 for Figure 1 Front view;

[0020] Figure 3 A sectional view of the hydraulic clutch mounted on the worktable;

[0021] Figure 4 A schematic diagram of the installation structure of the hydraulic control components;

[0022] Figure 5 This is a schematic diagram of a hydraulic clutch structure;

[0023] Figure 6 This is a schematic diagram of the hydraulic oil circuit control.

[0024] Figure 7 This is a schematic diagram of the control unit block.

[0025] Figure 8 Schematic diagram of test results

[0026] Figure 9 This is a schematic diagram of the pressure curve change during the calibration process using the tightening tool torque calibration system in this valve;

[0027] Figure 10 This is a schematic diagram of the tightening tool. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings.

[0029] refer to Figures 1 to 9The diagram illustrates a clutch load control module and a tightening tool torque calibration system. The clutch load control module mainly includes a hydraulic control component 100 and a hydraulic clutch 200. The hydraulic control component 100 includes a circulating oil tank 110, a low-pressure cylinder 120, a servo motor 130, and a control unit 140. As shown in the diagram, the low-pressure cylinder 120 contains a piston 121, which divides the low-pressure cylinder 120 into two relatively independent chambers: an oil outlet chamber 122 and an oil return chamber 123. The oil outlet chamber 122 is connected to the oil inlet of the hydraulic clutch 200 via an oil outlet line 124. The oil return chamber 123 is connected to an oil return line A125, which is also connected to the circulating oil tank 110 during implementation. A pressure sensor 170 is installed on the oil outlet line 124. Both the servo motor 130 and the pressure sensor 170 are communicatively connected to the control unit 140. The servo motor 130 drives the piston 121 to move linearly within the low-pressure cylinder 120.

[0030] During operation, the servo motor 130 is preferably a servo push rod motor. Its push rod extends into the low-pressure cylinder 120 and is fixedly connected to the piston 121. It has a sliding sealing structure between itself and the low-pressure cylinder 120. When the piston 121 moves toward the position close to the oil outlet line 124, it can press the hydraulic oil in the oil outlet chamber 122 into the cylinder of the hydraulic clutch 200, thereby moving the piston disc and gradually increasing the contact load of the friction plate, thereby changing the torque load that its drive disc can withstand. Because the hydraulic system is controlled by the servo motor 130, and the servo motor 130 can better automate the control, this structure can better meet the fine control of the clutch load, and the overall response is faster and more stable.

[0031] A replenishing oil line 126 is connected between the oil outlet chamber 122 and the circulating oil tank 110, mainly used to replenish hydraulic oil to the oil outlet chamber 122. A return oil line B127 is connected between the oil outlet of the hydraulic clutch 200 and the circulating oil tank 110, mainly used to discharge the hydraulic oil in the hydraulic clutch 200. In addition, in this embodiment, a solenoid valve 150 is provided on the oil outlet line 124. The solenoid valve 150 is communicatively connected to the control unit 140. The solenoid valve 150 can better control the pipeline opening and closing. Similarly, corresponding electrically controlled valves can also be provided on the return oil line A125, the replenishing oil line 126 and the return oil line B127 for rapid control.

[0032] Furthermore, to improve disassembly and assembly efficiency, the clutch load control module also includes a mounting plate 160, on which the circulating oil tank 110, low-pressure oil cylinder 120 and servo motor 130 are all mounted.

[0033] This application proposes a torque calibration system for tightening tools based on the aforementioned clutch load control module, as shown in the figure. It mainly includes a worktable 300 and the aforementioned clutch load control module. The clutch load control module is mounted on the worktable 300. An adapter 210 is detachably mounted on the drive disc of the hydraulic clutch 200. The adapter 210 has a socket 211 adapted to the tightening tool to be calibrated. Typically, the output end of the tightening tool to be calibrated has a square head structure, so the socket 211 is a matching square hole. Simultaneously, the hydraulic clutch 200 is equipped with a torque sensor for measuring its real-time torque. The torque sensor is communicatively connected to the control unit 140. In actual implementation, it can be combined with an encoder for measurement, mainly used to accurately acquire the torque generated by the reaction of the drive disc of the hydraulic clutch 200.

[0034] Key reference Figures 1 to 3 The workbench 300 has a box structure, and its interior has a bottom table 310, a middle table 320 and an operating table 330 arranged from bottom to top. In specific installation, the hydraulic control component 100 is mainly installed on the bottom table 310, while the hydraulic clutch 200 is installed on the middle table 320. The operating table 330 has multiple through holes 331 for the insertion hole 211 to be exposed.

[0035] In this embodiment, the operating table 330 has a stop component 340 (only one is shown in the figure) that corresponds one-to-one with the through hole 331. The stop component 340 is a vertically arranged rod-shaped body that is detachably fixed on the operating table 330 and located on the circumferential outer side of the through hole 331. It is mainly used to stop the handle of the tightening tool during testing to prevent it from rotating and to ensure that the output head can transmit the rotational torque to the adapter 210.

[0036] In addition, the operating table 330 has positioning elements 350 that correspond one-to-one with the through holes 331, as shown in the figure. The positioning element 350 is a cylindrical structure with a roughly T-shaped cross section. The adapter 210 is fitted with a bearing 220. The upper end of the positioning element 350 is fixed on the operating table 330 and is fixedly connected to the outer ring of the corresponding bearing 220, that is, it is interference-fitted with the outer ring of the bearing 220. The adapter 210 is slightly higher than the upper surface of the positioning element 350. In this way, the positioning element 350 actually forms a stable support for the upper end of the hydraulic clutch 200, which can effectively reduce or avoid polarization, thereby further improving the detection and calibration accuracy.

[0037] On the other hand, in order to facilitate quick assembly and disassembly of the hydraulic clutch 200, the hydraulic clutch 200 has a base 230, and a handle 240 is provided on the base 230. The handle 240 is vertically arranged, and the hydraulic clutch 200 can be directly picked up and placed horizontally through the handle 240.

[0038] Based on the aforementioned tightening tool torque calibration system, this application provides a corresponding tightening tool torque calibration method, which mainly includes the following steps:

[0039] The first step is to set the working torque of the tightening tool. It should be noted that the tightening tool mentioned in this application is a sensor-type tightening tool. Within the designed torque range, the required output torque can be set as needed.

[0040] The second step is to mate the output square head of the tightening tool with the socket 211 of the adapter 210, that is, insert the output square head into the socket 211, and ensure that the handle of the tightening tool is supported by a stop part 340 to prevent it from being thrown out at the moment of starting.

[0041] The third step is to start the tightening tool, and the output square head rotates through the adapter 210 to drive the drive disc of the hydraulic clutch 200 to rotate.

[0042] Fourth, the servo motor 130 operates at a set speed, sending hydraulic oil from the outlet chamber 122 of the low-pressure cylinder 120 into the cylinder of the hydraulic clutch 200 until the pressure set value and / or displacement set position are reached. A position switch, also connected to the control unit 140, then keeps the servo motor 130 operating, ensuring the piston position in the low-pressure cylinder 120 remains unchanged, thus maintaining stable cylinder pressure within the hydraulic clutch 200.

[0043] Fifth step: Record the real-time torque measured by the torque sensor.

[0044] The sixth step is to process the recorded real-time torque and the set working torque. This step mainly involves calculating the mean and the mean range to obtain the error value of the corresponding tightening tool, so as to eliminate errors or perform calibration.

[0045] In practice, before proceeding to the third step, the hydraulic clutch 200 and the oil outlet line 124 are purged. Specifically, the servo motor 130 operates, and low-pressure oil enters the cylinder of the hydraulic clutch 200 through the oil outlet line 124. At the same time, the valve on the return oil line B127, which is connected to the oil outlet of the hydraulic clutch 200, is opened. This process is repeated multiple times to purge the air from the oil outlet line 124 and the cylinder of the hydraulic clutch 200, thereby avoiding pressure errors caused by air.

[0046] refer to Figures 1 to 10The clutch load control module and tightening tool torque calibration system shown herein, in specific implementation, the control unit 140 mainly includes a host industrial control computer system and an MCU. The MCU is mainly used to collect pressure data and torque values, and issue corresponding commands to servo motors and solenoid valves. In conjunction with the calibration process, it can also collect the rotation signal of the hydraulic clutch and transmit it to the MCU for further rapid response. The host industrial control system mainly includes a display and read / write module and a data processing module. The display and read / write module is mainly used to write relevant information based on the calibration tightening and to display the read and written relevant information. It usually includes components such as a monitor, keyboard, and mouse. The data processing module mainly processes the measured torque value and the set working torque (i.e., nominal torque), including the calculation of the mean and range mean, and curve plotting.

[0047] like Figure 8 As shown in the figure, this utility model was used to test and calibrate a tightening tool of model C9611682. The nominal torque value was set to 22 N·m. After measuring 30 sets of data, the average value was 21.874, and the average range was 0.750. Based on these values, the tightening tool can be directly adjusted to ensure the accuracy of the actual torque during subsequent use. The load change diagram during the measurement process can be found in the figure. Figure 9 .

[0048] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model. Those skilled in the art, under the guidance of the present utility model, can make various similar representations without departing from the spirit and claims of the present utility model, and such modifications all fall within the protection scope of the present utility model.

Claims

1. A clutch load control module, characterized in that: The system includes a hydraulic control assembly (100) and a hydraulic clutch (200). The hydraulic control assembly (100) includes a circulating oil tank (110), a low-pressure cylinder (120), a servo motor (130), and a control unit (140). The low-pressure cylinder (120) has a piston (121) that divides the low-pressure cylinder (120) into an oil outlet chamber (122) and an oil return chamber (123). The oil outlet chamber (122) is connected to the oil inlet of the hydraulic clutch (200) through an oil outlet line (124). The oil return chamber (123) is connected to an oil return line A (125). A pressure sensor (170) is provided on the oil outlet line (124). The servo motor (130) and the pressure sensor (170) are both connected to the control unit (140). The servo motor (130) is used to drive the piston (121) to move linearly in the low-pressure cylinder (120).

2. The clutch load control module according to claim 1, characterized in that: The oil outlet line (124) is equipped with a solenoid valve (150), which is communicatively connected to the control unit (140).

3. The clutch load control module according to claim 2, characterized in that: The oil outlet chamber (122) is connected to the circulating oil tank (110) by a replenishing oil line (126), and the oil outlet of the hydraulic clutch (200) is connected to the circulating oil tank (110) by a return oil line B (127).

4. A clutch load control module according to any one of claims 1 to 3, characterized in that: The device includes a mounting plate (160), on which the circulating oil tank (110), low-pressure oil cylinder (120) and servo motor (130) are all mounted.

5. A torque calibration system for tightening tools, characterized in that: The device includes a worktable (300) and a clutch load control module as described in any one of claims 1 to 4, wherein the clutch load control module is mounted on the worktable (300), and an adapter (210) is detachably mounted on the drive disc of the hydraulic clutch (200), the adapter (210) having a socket (211) adapted to a tightening tool to be calibrated, and a torque sensor for measuring its real-time torque is provided on the hydraulic clutch (200), the torque sensor being communicatively connected to the control unit (140).

6. The tightening tool torque calibration system according to claim 5, characterized in that: The workbench (300) has a bottom table (310), a middle table (320) and an operating table (330) arranged sequentially from bottom to top. The hydraulic control component (100) is mounted on the bottom table (310), the hydraulic clutch (200) is mounted on the middle table (320), and the operating table (330) has a plurality of through holes (331) for the insertion hole (211) to be exposed.

7. The tightening tool torque calibration system according to claim 6, characterized in that: The operating table (330) has a stop component (340) that corresponds one-to-one with the through hole (331).

8. The tightening tool torque calibration system according to claim 6 or 7, characterized in that: The operating table (330) has positioning elements (350) that correspond one-to-one with the through holes (331). The adapter (210) is fitted with a bearing (220). The positioning elements (350) are fixed on the operating table (330) and are fixedly connected to the outer ring of the corresponding bearing (220). The adapter (210) is higher than the upper surface of the positioning elements (350).

Images