Tightening device

Abstract

The invention relates to the technical field of train brake disc assembly, in particular to a tightening device. The invention provides a tightening device which comprises a base, a control arm and a working assembly, the working assembly comprises a first support and a torque gun, the first support is connected with one end of the control arm, the first support is of a stepped structure, a through hole is formed in a step, close to one end of the control arm, of the first support, and the torque gun is installed at the through hole; the torque gun not only can be used for assembling the fastener, but also can be used for semi-automatically disassembling the fastener. The positioning assembly and the torque gun are oppositely arranged, the positioning assembly accurately positions the brake disc before operation, the accuracy of tightening operation of the torque gun is guaranteed, the positioning assembly and the torque gun work cooperatively, it is guaranteed that each bolt can be installed with accurate torque and rotation angle, and brake disc operation faults caused by installation errors are effectively avoided.

Description

Technical Field

[0001] The present application relates to the technical field of train brake disc assembly, and in particular to a tightening device. Background Art

[0002] Foundation braking for rail trains is a core technology for ensuring safe vehicle stopping, primarily encompassing disc braking and tread braking. Disc braking, further subdivided into wheel-mounted disc brakes and axle-mounted disc brakes, is widely used on high-speed trains because it prevents frictional heat from being transferred to the wheels during braking, effectively preventing problems such as wheel tread separation.

[0003] There are currently a variety of technical solutions for tightening rail train brake discs. Most existing solutions use torque wrenches for manual tightening, which is relatively simple to operate. Additionally, existing technologies include dual-axis automatic tightening machines, which can achieve automated operation.

[0004] However, existing technologies all have limitations. Manual tightening with a torque wrench is difficult to achieve precise operation when working with fasteners requiring angle control, and is time-consuming and labor-intensive. While dual-axis automatic tightening machines offer automation, they are expensive, require a large footprint, and are highly specialized, making them difficult to adapt to diverse working conditions and lacking versatility. Summary of the Invention

[0005] In order to solve the technical problems involved in the above-mentioned background technology, the present application provides a tightening device, including a base, a control arm and a working assembly, the working assembly including a first bracket and a torque gun, the first bracket being connected to one end of the control arm, the first bracket having a stepped structure, a through hole being opened on the step near one end of the control arm, and a torque gun being installed at the through hole,

[0006] The working assembly also includes a positioning assembly. A base plate extends from one end of the first bracket away from the control arm toward the base. The base plate is parallel to the control arm. The positioning assembly is installed on the base plate. The positioning assembly is arranged opposite to the torque gun.

[0007] According to an implementation provided in an embodiment of the present application, the first bracket also has a second step and a handle. The second step is located at the end of the step with a through hole. A groove is provided on the second step, and a handle is installed in the groove. The direction of the handle portion of the handle is parallel to the length direction of the control arm.

[0008] According to an implementation method provided in an embodiment of the present application, an electronic control component is provided at the tail of the torque gun, and a first control unit is provided on one side of the connection part between the first bracket and the control arm. The first control unit controls the electronic control component to turn on and off the torque gun.

[0009] According to an implementation provided in an embodiment of the present application, the working component is connected to a control arm via a first rotating shaft. The first rotating shaft includes a rotating disk and at least two rotating parts. The rotating parts are symmetrically arranged on both sides of the rotating disk to control the rotation angle of the rotating disk.

[0010] According to an implementation provided in an embodiment of the present application, the control arm includes at least two horizontal bars and two vertical bars, and at least one vertical bar is connected to each end of the horizontal bar. One of the vertical bars is connected to the working component through a first rotating shaft, and pushing the vertical bar can drive the horizontal bar to rotate up and down around the other vertical bar.

[0011] According to an implementation provided in an embodiment of the present application, when the control arm is in the first position, the cross bar is tilted in the second direction away from the base side; when the control arm is in the second position, the cross bar is tilted in the second direction close to the base side.

[0012] According to an implementation provided in an embodiment of the present application, the control arm further includes a hydraulic assembly, which is installed on one of the cross bars, and one end of the hydraulic assembly is connected to the other cross bar.

[0013] According to an embodiment of the present application, the base includes a first rotating arm and a fixed frame. A second rotating shaft is provided at one end of the first rotating arm, and the first rotating arm is connected to the fixed frame via the second rotating shaft.

[0014] A third rotating shaft is provided at one end of the first rotating arm away from the fixing frame, and the first rotating arm is connected to the control arm via the third rotating shaft.

[0015] According to an implementation provided in an embodiment of the present application, a rotating member is provided at one end of the first rotating arm close to the fixed frame, and the rotating member is connected to the third rotating shaft.

[0016] According to an implementation provided in an embodiment of the present application, an alarm device and a second control unit are provided at one end of the fixing frame away from the first rotating arm.

[0017] Compared to existing technologies, this application offers significant technical advancements: the torque gun can both assemble and semi-automatically disassemble fasteners. The relative positioning of the positioning assembly and the torque gun ensures the accuracy of the torque gun's tightening operation by precisely positioning the brake disc before operation. The two work together to ensure that each bolt is installed with precise torque and angle, effectively avoiding brake disc malfunctions caused by installation errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 A schematic structural diagram of a tightening device provided in an embodiment of the present application;

[0020] Figure 2 for Figure 1 A structural schematic diagram of the device shown in FIG. 1 moving toward the first position;

[0021] Figure 3 for Figure 1 Schematic diagram of the structure of the device moving to the second position.

[0022] Description of reference numerals:

[0023] 100-base; 110-first rotating arm; 120-fixed frame; 200-control arm; 210-cross bar; 300-working assembly; 310-first bracket; 320-torque gun; 330-positioning assembly; 340-handle; 410-first rotating shaft; 420-second rotating shaft; 430-third rotating shaft.

[0024] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of this application and are not intended to limit the scope of protection of this application. Those skilled in the art may adjust them as needed to suit specific applications.

[0027] Secondly, it should be noted that in the description of this application, terms such as "front", "back", "left", "right", "up", "down", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on this application.

[0028] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0029] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0030] Foundation braking for rail trains is a core technology for ensuring safe vehicle stopping, primarily encompassing disc braking and tread braking. Disc braking, further subdivided into wheel-mounted disc brakes and axle-mounted disc brakes, is widely used on high-speed trains because it prevents frictional heat from being transferred to the wheels during braking, effectively preventing problems such as wheel tread separation.

[0031] There are currently a variety of technical solutions for tightening rail train brake discs. Most existing solutions use torque wrenches for manual tightening, which is relatively simple to operate. Additionally, existing technologies include dual-axis automatic tightening machines, which can achieve automated operation.

[0032] However, existing technologies all have limitations. Manual tightening with a torque wrench is difficult to achieve precise operation when working with fasteners requiring angle control, and is time-consuming and labor-intensive. While dual-axis automatic tightening machines offer automation, they are expensive, require a large footprint, and are highly specialized, making them difficult to adapt to diverse working conditions and lacking versatility.

[0033] Figure 1 A schematic structural diagram of a tightening device provided in an embodiment of the present application; Figure 2for Figure 1 A structural schematic diagram of the device shown in FIG. 1 moving toward the first position; Figure 3 for Figure 1 Schematic diagram of the structure of the device moving to the second position.

[0034] In order to solve the above technical problems, Figure 1-3 As shown, the present application provides a tightening device, including a base 100, a control arm 200 and a working assembly 300. The working assembly 300 includes a first bracket 310 and a torque gun 320. The first bracket 310 is connected to one end of the control arm 200. The first bracket 310 has a stepped structure. A through hole is opened on the step near one end of the control arm 200 of the first bracket 310, and a torque gun 320 is installed at the through hole.

[0035] The working assembly 300 also includes a positioning assembly 330. A base plate extends from one end of the first bracket 310 away from the control arm 200 toward the base 100. The base plate is parallel to the control arm 200. The positioning assembly 330 is installed on the base plate. The positioning assembly 330 is arranged opposite to the torque gun 320.

[0036] It should be noted that the base 100 has a vertical rod body, and the four sides of the rod body are fixedly connected with ribs. The other end of the ribs is fixedly connected to a bottom plate, serving as the support base of the entire device, providing a stable working platform for the control arm 200 and the working component 300, ensuring the overall stability of the device during the tightening process, and avoiding the influence of shaking on the tightening accuracy.

[0037] The control arm 200 can adjust the position and angle of the working component 300 according to actual operational requirements, allowing the torque gun 320 to accurately align with the bolts on the brake disc. Compared with manual operation, this greatly reduces tightening errors caused by operating angle deviation, significantly improving work efficiency and operational convenience.

[0038] The torque gun 320 is mounted in the stepped through-hole of the first bracket 310. The end of the torque gun 320 is equipped with a clamping structure that engages with the brake disc bolts. The torque gun 320 can both assemble and semi-automatically disassemble fasteners. The positioning assembly 330 is positioned opposite the torque gun 320. The positioning assembly 330 precisely positions the brake disc before operation, ensuring the accuracy of the torque gun 320's tightening operation. The two work together to ensure that each bolt is installed with precise torque and angle, effectively preventing brake disc malfunctions caused by installation errors.

[0039] According to an embodiment provided in an embodiment of the present application, the first bracket 310 also has a second step and a handle 340. The second step is located at the end of the step with a through hole. A groove is provided on the second step, and the handle 340 is installed in the groove. The direction of the handle part of the handle 340 is parallel to the length direction of the control arm 200.

[0040] It should be noted that the second step and handle 340 added to the first bracket 310 enable multi-directional and multi-angle tracking of the torque gun 320, facilitating the tightening of fasteners in different locations. The second step is located at the end of the step where the torque gun 320 is mounted. The handle 340 installed in the groove provides a stable and ergonomic grip for the operator. The handle portion of the handle 340 is designed to be parallel to the length of the control arm 200. When the operator operates the device, the direction of force exerted by the hand is consistent with the direction of movement of the control arm, allowing for more precise control of the movement and positioning of the working component 300, effectively reducing shaking and deviation during operation, and further improving the precision and stability of the tightening operation.

[0041] Furthermore, when fine-tuning the tightening device's position or performing manual assisted operations, the presence of handle 340 eliminates the need for the operator to directly contact other components of the device, avoiding accidents caused by accidental contact and improving operational safety. Furthermore, applying external force through handle 340 makes it easier to move the control arm 200 and working assembly 300, particularly in confined spaces or unusual operating environments. This significantly enhances the device's operability and reduces the operator's workload.

[0042] It's worth noting that when dealing with special models or awkwardly positioned brake discs, the operator can use the grip 340 to manipulate the device with more flexible postures and angles, overcoming the limitations of automated operation in complex working conditions and expanding the application scenarios of the tightening device. This allows the tightening device to meet the needs of automated high-precision tightening while also taking into account the convenience of manual assisted operation.

[0043] According to an implementation method provided in an embodiment of the present application, an electronic control component is provided at the tail of the torque gun 320, and a first control unit is provided on one side of the connection part between the first bracket 310 and the control arm 200. The first control unit controls the electronic control component to turn on and off the torque gun.

[0044] It should be noted that, among the electronic control components at the rear of the torque gun 320 and the first control unit installed on the side, the first control unit is arranged on one side of the connection part between the first bracket 310 and the control arm 200. When operating the control arm, the operator can touch the first control unit at any time to realize one-button opening or closing of the torque gun 320, which greatly improves the smoothness of operation. Compared with the traditional manual frequent starting and stopping of torque tools, it greatly shortens the operation preparation time and significantly improves the overall work efficiency.

[0045] On the one hand, the first control unit's precise control of the torque gun 320's electronic control components effectively eliminates the risk of accidental activation due to misoperation. During non-tightening operations, such as moving the device, commissioning, or maintenance, the operator can promptly shut down the torque gun 320, preventing damage to personnel and equipment caused by accidental tool operation. Furthermore, upon completion of the tightening operation, the first control unit disconnects the torque gun 320's power supply, preventing overtightening and idling wear, thereby extending the service life of the device.

[0046] Furthermore, the coordination between the electronic control assembly and the first control unit ensures precise control of the torque gun 320's operating state. The first control unit precisely controls the torque gun 320's startup, operating speed, and shutdown time, eliminating torque fluctuations caused by improper force and timing during traditional manual startup and shutdown operations. This ensures highly consistent torque output during each tightening operation, further improving the precision and reliability of brake disc bolt installation, effectively reducing potential brake system failures caused by installation errors, and enhancing rail train safety.

[0047] According to an embodiment provided in an embodiment of the present application, the working component 300 is connected to the control arm 200 through a first rotating shaft 410. The first rotating shaft 410 includes a rotating disk and at least two rotating parts. The rotating parts are symmetrically arranged on both sides of the rotating disk to control the rotation angle of the rotating disk.

[0048] It should be noted that the connection between the working assembly 300 and the control arm 200 via the first rotating shaft 410 provides the tightening device with greater flexibility and precision. The rotating disk of the first rotating shaft 410 cooperates with the symmetrically arranged rotating parts, enabling flexible, multi-angle and multi-directional rotation of the working assembly 300. When faced with train brake discs of varying models and installation positions, the operator can precisely adjust the angle of the rotating disk by controlling the rotating parts, allowing the torque gun 320 to quickly align with the bolt without the need for frequent movement of the entire device. This effectively reduces adjustment time and significantly improves work efficiency.

[0049] Symmetrical rotating parts ensure stability and balance during the rotation of the working assembly 300. As the rotating disk rotates, the rotating parts on both sides work together to prevent wobbling or deviation caused by uneven force, ensuring the positional accuracy of the torque gun 320 during tightening operations. The structure of the first rotating shaft 410 enables more stable transmission of control force, reducing tightening deviation caused by rotational errors, further improving the accuracy of brake disc bolt installation and reducing the risk of installation errors.

[0050] Furthermore, the precise control of the rotation angle of the first rotating shaft 410 enables the tightening device to adapt to complex and changing operating environments. In the confined space of railway train maintenance or in specialized installation conditions, operators can flexibly adjust the posture of the working assembly 300 according to actual needs, fully leveraging the device's performance advantages. This flexible and precise angle adjustment capability not only expands the tightening device's applicability but also enhances its versatility in various operating scenarios, providing more reliable and efficient technical support for the installation and maintenance of railway train brake discs.

[0051] According to an implementation method provided in an embodiment of the present application, the control arm 200 includes at least two horizontal bars 210 and two vertical bars, and at least one vertical bar is connected to each end of the horizontal bar 210. One of the vertical bars is connected to the working component 300 through a first rotating shaft 410. Pushing the vertical bar can drive the horizontal bar 210 to rotate up and down around the other vertical bar.

[0052] It should be noted that the control arm 200 is composed of a horizontal rod 210 and a vertical rod. By pushing the vertical rod to drive the horizontal rod 210 to rotate up and down around another vertical rod, the operator can quickly adjust the height and angle of the working component 300.

[0053] During adjustment, this structure not only supports the weight of the working assembly 300 and torque gun 320, ensuring overall stability, but also allows for rotation to accommodate railcar brake discs of varying heights and mounting angles. For different brake disc models, or consoles with different sizes for clamping brake discs, operators can quickly adjust the torque gun 320 to the appropriate operating position by pushing the vertical lever, reducing the time required for repeated adjustments due to mismatched positions and improving operational efficiency.

[0054] According to an implementation provided in an embodiment of the present application, when the control arm 200 is in the first position, the cross bar 210 is tilted in the second direction away from the base 100 side; when the control arm 200 is in the second position, the cross bar 210 is tilted in the second direction close to the base 100 side.

[0055] It should be noted that the switching of the control arm 200 between the first position and the second position is achieved by swinging the control arm 200 upward or downward using the handle 340. When the control arm 200 is in the first position and the crossbar 210 is tilted in the second direction away from the base 100, in order to use the handle 340 to drive the torque gun 320 upward, the two crossbars 210 on the control arm 200 are swung upward, and the vertical bar near one end of the torque gun 320 moves upward, while the other vertical bar remains unchanged.

[0056] When the control arm 200 switches to the second position and the crossbar 210 tilts toward the second direction near the base 100, the two crossbars 210 on the control arm 200 swing downward to drive the torque gun 320 downward using the handle 340. The vertical rod near one end of the torque gun 320 moves downward, while the other vertical rod remains unchanged.

[0057] Since the hydraulic component is installed on one of the cross bars 210 and one end of the hydraulic component is connected to the other cross bar 210, the thrust of the hydraulic component supports the gravity of the upper and lower cross bars 210 and the working component 300, preventing the cross bar 210 from slipping, so that the control arm 200 can stop at the first position, the second position and any angle between the two positions at any time, thereby improving the working range that the device can cover.

[0058] According to an embodiment of the present application, the base 100 includes a first rotating arm 110 and a fixing frame 120. A second rotating shaft 420 is provided at one end of the first rotating arm 110. The first rotating arm 110 is connected to the fixing frame 120 via the second rotating shaft 420.

[0059] A third rotating shaft 430 is provided at one end of the first rotating arm 110 away from the fixing frame 120 , and the first rotating arm 110 is connected to the control arm 200 via the third rotating shaft 430 .

[0060] It should be noted that the first rotating arm 110 is connected to the fixed frame 120 via the second rotating shaft 420, allowing the entire device to be rotated and adjusted at multiple angles, with the fixed frame 120 as the support point. In the complex environment of railway train maintenance, operators can flexibly rotate the first rotating arm 110 according to the specific position of the brake disc, quickly adjusting the working assembly 300 to the appropriate position without frequently moving the entire device, thereby improving work efficiency.

[0061] The first pivot arm 110 and the control arm 200 are connected via the third pivot shaft 430, further enhancing the device's operational flexibility. This connection allows for more precise angle adjustments and posture changes of the control arm 200, based on the first pivot arm 110. When faced with a difficult train brake disc installation location or limited space, the operator can first adjust the approximate position of the first pivot arm 110 using the second pivot shaft 420, then precisely adjust the angle of the control arm 200 using the third pivot shaft 430, allowing the torque gun 320 to accurately align the bolts.

[0062] According to an implementation provided in an embodiment of the present application, a rotating member is provided at one end of the first rotating arm 110 close to the fixing frame 120 , and the rotating member is connected to the third rotating shaft 430 .

[0063] It should be noted that the rotating member provided at one end of the first rotating arm 110 near the fixed frame 120 is connected to the third rotating shaft 430, which brings a more refined improvement to the operational performance of the tightening device. The existence of this rotating member makes the rotation of the control arm 200 on the first rotating arm 110 smoother and more precise. When tightening the brake disc bolts, the operator can achieve precise adjustment of the control arm 200 within a very small angle range by finely manipulating the rotating member. Compared with the previous reliance on the rotation of the third rotating shaft 430, the accuracy of the torque gun 320 in aligning the bolts is significantly improved, avoiding multiple alignment attempts due to angle deviation, greatly shortening the operation time, and improving the efficiency of the tightening operation.

[0064] In addition, the damping and limiting structure of the rotating part can effectively prevent the control arm 200 from shaking or losing control during the rotation process, ensuring that the torque gun 320 always remains stable during the tightening operation.

[0065] According to an implementation provided in an embodiment of the present application, an alarm device and a second control unit are provided at one end of the fixing bracket 120 away from the first rotating arm 110 .

[0066] It should be noted that the alarm device and second control unit, located at one end of the fixing bracket 120 away from the first rotating arm 110, significantly enhance the safety and service life of the tightening device. The alarm device monitors whether the device's torque exceeds the specified range. If it detects abnormal torque output from the torque gun 320, an angle of rotation outside the safe range of the control arm 200, or abnormal vibration or overload, it immediately issues an audible and visual alarm signal. This not only immediately alerts the operator to stop operations and troubleshoot, preventing improper installation of the brake disc bolts due to abnormal operation, but also effectively prevents further damage to the device caused by continued operation due to a fault, thereby reducing operational risks and equipment maintenance costs.

[0067] The second control unit works in conjunction with the torque gun 320's electronic control components and the first control unit. It pre-sets operating data, such as torque values ​​and rotation angle parameters, based on the tightening requirements of different brake disc models and monitors the tightening process in real time. If a deviation between the actual tightening parameters and the preset values ​​is detected, the second control unit quickly responds and automatically adjusts the torque gun 320's operating state to ensure that each bolt is installed with the correct torque and rotation angle, effectively improving the precision and consistency of the tightening operation.

[0068] In addition, the combination of the alarm device and the second control unit enables the second control unit to perform a self-inspection of the device before operation, and feedback the operating status of the equipment through the alarm device to discover potential fault hazards in advance.

[0069] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of the present application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0070] It should be understood that the present application is not limited to the exact structure described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A tightening device, characterized in that: It includes a base (100), a control arm (200) and a working assembly (300), The working assembly (300) includes a first bracket (310) and a torque gun (320). The first bracket (310) is connected to one end of the control arm (200). The first bracket (310) has a stepped structure. A through hole is formed on the first step of the first bracket (310) near one end of the control arm (200). The torque gun (320) is installed at the through hole. The working assembly (300) further includes a positioning assembly (330); a base plate is extended from one end of the first bracket (310) away from the control arm (200) toward the base (100); the base plate is parallel to the control arm (200); the positioning assembly (330) is mounted on the base plate, and the positioning assembly (330) is arranged opposite to the torque gun (320).

2. A tightening device according to claim 1, characterized in that: The first bracket (310) further comprises a second step and a handle (340), wherein the second step is located at the end of the step having the through hole, a groove is provided on the second step, and the handle (340) is installed in the groove, and the direction of the handle portion of the handle (340) is parallel to the length direction of the control arm (200).

3. A tightening device according to claim 1, characterized in that: The rear portion of the torque gun (320) is provided with an electric control component, and a first control unit is provided on one side of the connection portion between the first bracket (310) and the control arm (200). The first control unit controls the electric control component to turn the torque gun on and off.

4. A tightening device according to claim 1, characterized in that: The working assembly (300) is connected to the control arm (200) via a first rotating shaft (410). The first rotating shaft (410) includes a rotating disk and at least two rotating members. The rotating members are symmetrically arranged on both sides of the rotating disk to control the rotation angle of the rotating disk.

5. A tightening device according to claim 4, characterized in that: The control arm (200) includes at least two horizontal bars (210) and two vertical bars, and the two ends of the horizontal bar (210) are respectively connected to at least one vertical bar, wherein one of the vertical bars is connected to the working assembly (300) via the first rotating shaft (410), and pushing the vertical bar can drive the horizontal bar (210) to rotate up and down around the other vertical bar.

6. A tightening device according to claim 5, characterized in that: When the control arm (200) is located at the first position, the crossbar (210) is tilted in the second direction away from the side of the base (100); When the control arm (200) is located at the second position, the crossbar (210) is inclined in the second direction toward one side of the base (100).

7. A tightening device according to claims 4-6, characterized in that: The control arm (200) further includes a hydraulic assembly, wherein the hydraulic assembly is mounted on one of the cross bars (210), and one end of the hydraulic assembly is connected to the other cross bar (210).

8. A tightening device according to claim 1, characterized in that: The base (100) includes a first rotating arm (110) and a fixed frame (120), wherein a second rotating shaft (420) is provided at one end of the first rotating arm (110), and the first rotating arm (110) is connected to the fixed frame (120) via the second rotating shaft (420). A third rotating shaft (430) is provided at one end of the first rotating arm (110) away from the fixing frame (120), and the first rotating arm (110) is connected to the control arm (200) via the third rotating shaft (430).

9. A tightening device according to claim 8, characterized in that: A rotating member is provided at one end of the first rotating arm (110) close to the fixing frame (120), and the rotating member is connected to the third rotating shaft (430).

10. A tightening device according to claim 8-9, characterized in that: An alarm device and a second control unit are provided at one end of the fixing frame (120) away from the first rotating arm (110).

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