A torque wrench for railway maintenance

Abstract

The utility model discloses a railway machine service torque wrench belongs to railway machine maintenance tool technical field, including torque wrench and be used for supporting and rotating torque wrench's screwing frame, and torque wrench is by torque lever, ratchet head and holding rod and is composed, and torque lever one end is fixedly connected with ratchet head, and the other end is fixedly connected with holding rod, and screwing frame contains support, power device, drive rod and support base. The utility model discloses through electric power drive replacement manpower, and the operation intensity of large -scale bolt fastening is reduced significantly, and through support rigidity support, guide structure guide and support base constraint, effectively prevent the deviation and the jitter in the process of effort, promote torque accuracy and security, combine automatic alarm shutdown function, simplify the operation process, improve maintenance efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of railway locomotive maintenance tools, specifically a torque wrench for railway locomotive maintenance. Background Technology

[0002] A torque wrench, also known as a torque control wrench, is a tool that applies and precisely controls the output torque. It is widely used in situations requiring the tightening or loosening of bolts / nuts to a specific torque value. Its core function is to ensure that threaded connections achieve the designed preload, thereby guaranteeing the reliability and safety of the connection.

[0003] In the field of railway locomotive maintenance, bolts and nuts used on critical components such as rails, bogies, and engines are typically large and require high preload. Using traditional torque wrenches for tightening operations presents the following significant challenges: the initial starting torque and the final torque required to reach the set torque for large bolts and nuts are extremely high, making operation difficult; during the application of this enormous torque, the operator struggles to maintain stable control of the wrench, leading to slippage and deviation, uneven force application, reduced torque accuracy, and even safety hazards, ultimately reducing the efficiency of railway maintenance operations. Utility Model Content

[0004] The purpose of this utility model is to provide a torque wrench for railway locomotive maintenance, so as to solve the problems of difficult operation, poor operation stability and low efficiency mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides a torque wrench for railway locomotive maintenance, including a torque wrench and a tightening frame for supporting the rotating torque wrench.

[0006] The torque wrench includes a torque lever, a ratchet head, and a handle, wherein one end of the torque lever is fixedly connected to the ratchet head, and the other end is fixedly connected to the handle. The tightening arm includes a support, a power unit, a drive rod, and a bracket, wherein the power unit is fixedly mounted on the support, one end of the drive rod is rotatably connected to the power unit, and the other end is rotatably connected to the bracket, and the bracket and handle are detachably fixedly connected.

[0007] Furthermore, the support includes a base plate and two oppositely arranged side plates. The base plate and the two side plates form a U-shaped structure. The opening width of the U-shaped structure is adapted to the outer diameter of the handle, and the handle is engaged in the U-shaped opening of the support.

[0008] Furthermore, the power unit includes a motor, a screw, a nut, a slide bar, a baffle, and a guide structure. The screw and nut are threaded together, and the nut is fixedly connected to one end of the slide bar. One end of the screw is fixedly connected to the output shaft of the motor, and the other end is rotatably connected to the baffle. The guide structure is fixedly mounted on a support, and the slide bar is slidably connected to the guide structure, allowing the slide bar to move linearly along the guide mechanism. The motor is fixedly mounted at one end of the support, and the baffle is fixedly mounted at the other end of the support.

[0009] Furthermore, the slide bar includes a first elongated structure and a second elongated structure. The first elongated structure and the second elongated structure are parallel to each other and spaced apart, forming a slide bar gap between them. One end of the first elongated structure and the second elongated structure are fixedly connected to a nut, and the other end is rotatably connected to a drive rod via a pin.

[0010] Furthermore, the guiding structure includes a first guide rail, a second guide rail disposed opposite to the first guide rail, and a support plate. One end of the upper part of the support plate is fixedly connected to one end of the first guide rail, and the other end is fixedly connected to one end of the second guide rail. This allows the first guide rail, the second guide rail, and the support plate to collectively define an open space, the opening of which faces away from the support plate. The bottom of the support plate is fixedly connected to a support, the end of the first guide rail away from the support plate is fixedly connected to a baffle, the end of the second guide rail away from the support plate is fixedly connected to the baffle, and the slide rod is slidably engaged with the first guide rail.

[0011] Furthermore, a screw hole is provided on the support plate, and the screw passes through the screw hole.

[0012] Furthermore, the torque wrench also includes an alarm that engages with the ratchet head, the alarm being located inside the torque lever near the end of the ratchet head.

[0013] Furthermore, the railway locomotive torque lever also includes a controller and a start / stop button. The controller is fixedly mounted on the torque lever, and the start / stop button is fixedly mounted on the support. The controller is connected to both the start / stop button and the power unit, and is used to receive start / stop signals from the start / stop button and control the start / stop of the power unit.

[0014] Furthermore, the controller is also connected to the alarm, and is used to receive alarm signals from the alarm and to control the power unit to stop.

[0015] This utility model has the following advantages over the prior art:

[0016] 1. This utility model replaces the manual rotation of a torque wrench with a screw-nut-slide mechanism driven by an electric motor, transforming the enormous starting torque and continuous force application process that the operator needs to overcome into electric drive. This greatly reduces the physical burden on the operator, allowing them to complete the tightening of large bolts / nuts without expending enormous physical strength.

[0017] 2. This utility model provides a stable foundation for the entire force application system through the rigid support structure and guide structure of the support. The sliding rod slides on the guide rail through the sliding rod gap, and the support seat provides a stable constraint on the handle. Together, they effectively prevent the torque wrench from sliding, deviating and shaking during the force application process, which greatly improves the stability and uniformity of the force application. This not only improves the accuracy of torque application and ensures that the bolt preload meets the design requirements, but also reduces the safety risks such as personnel injury and component damage caused by wrench slippage and deviation.

[0018] 3. This utility model, through its electric drive structure, is faster and less labor-intensive than purely manual operation, significantly shortening the tightening time of a single bolt. The combination of the controller and start / stop button makes operation more convenient; the operator only needs to press the button to start or stop the power unit without having to exert effort to maintain a force state. The alarm is integrated with the torque lever and linked to the controller, automatically stopping the motor and sounding an alarm when the preset torque value is reached. This eliminates the need for the operator to constantly monitor the torque gauge or rely on feel, simplifying the operation process, reducing human judgment errors and waiting time, and further improving the overall efficiency of maintenance work. Attached Figure Description

[0019] Figure 1 This is a front perspective view of the present invention;

[0020] Figure 2 This is a left-side perspective view of the present invention;

[0021] Figure 3 This is a rear-view perspective view of the present invention;

[0022] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle;

[0023] Figure 5 This is a schematic diagram of the start-stop process of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1—Torque wrench; 11—Torque lever; 12—Ratchet head;

[0026] 13—Handle; 14—Alarm; 2—Tightening bracket;

[0027] 21—Support; 22—Drive rod; 23—Bracket;

[0028] 24—Base plate; 25—Side plate; 3—Power unit;

[0029] 31—Motor; 32—Screw; 33—Nut;

[0030] 34—Sliding rod; 35—First long strip structure; 36—Second long strip structure;

[0031] 37—Baffle; 4—Guide structure; 41—First guide rail;

[0032] 42—Second guide rail; 43—Support plate; 44—Screw hole;

[0033] 5—Controller; 6—Start / Stop button. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0035] like Figures 1 to 5 As shown, an embodiment of this utility model provides a torque wrench for railway locomotive maintenance, including a torque wrench 1 and a tightening frame.

[0036] The torque wrench 1 includes a torque lever 11, a ratchet head 12, and a handle 13. One end of the torque lever 11 is fixedly connected to the ratchet head 12, and the other end of the torque lever 11 is fixedly connected to the handle 13. The tightening frame 2 is used to support and rotate the torque wrench 1, and includes a support 21, a power unit 3, a drive rod 22, and a bracket 23. The power unit 3 is fixedly mounted on the support 21. One end of the drive rod 22 is rotatably connected to the power unit 3, and the other end of the drive rod 22 is rotatably connected to the handle 13. The bracket 23 is detachably fixedly connected to the handle 13.

[0037] In this embodiment, the torque wrench 1 is an improvement on the existing standard torque wrench model. Measures such as adding a rubber sleeve to the outer periphery of the handle 13 of the torque wrench 1 to enhance frictional resistance ensure sufficient stability when connected to the tightening frame. The support 21 provides a stable foundation for the entire assembly, effectively preventing vibration and deviation of the torque wrench 1 during force application, greatly improving the stability of force application and the accuracy of torque application. Powered by a power unit, it is faster and less strenuous than purely manual operation, shortening the tightening time of individual bolts and improving overall work efficiency.

[0038] like Figure 3As shown, in this embodiment, the support 23 includes a base plate 24 and two oppositely arranged side plates 25. The base plate and the two side plates form a U-shaped structure, and the opening width of the U-shaped structure matches the outer diameter of the handle 13. The handle 13 is engaged within the U-shaped opening of the support 23. The torque wrench 1 is detachably and fixedly connected to the tightening frame 2 via the support 23, so that the torque wrench 1 can not only be rotated by the tightening frame 2 to achieve operation, but can also be detached from the tightening frame 2 for independent use to cope with different usage scenarios, thereby improving the applicability of this embodiment.

[0039] In this embodiment, the power unit 3 includes a motor 31, a screw 32, a nut 33, a slide bar 34, a baffle 37, and a guide structure 4. The screw 32 and nut 33 are threaded together. The nut 33 is fixedly connected to one end of the slide bar 34. One end of the screw 32 is fixedly connected to the output end of the motor 31, and the other end of the screw 32 is rotatably connected to the baffle 37. The guide structure 4 is fixedly mounted on a support, and the slide bar 34 is slidably connected to the guide structure 4, allowing the slide bar 34 to move linearly along the guide structure 4. The motor 31 is fixedly mounted on one end of the support 21, and the baffle 37 is fixedly mounted on the other end of the support 21. The screw 32-nut 33-slide bar 34 mechanism driven by the motor 31 replaces the manual rotation of a torque wrench, converting the enormous starting torque and continuous force application process that the operator needs to overcome into electric drive. This greatly reduces the physical burden on the operator, allowing them to complete the tightening of large bolts / nuts without expending enormous physical strength.

[0040] like Figure 4 As shown, in this embodiment, the slide bar 34 includes a first elongated structure 35 and a second elongated structure 36. The first elongated structure 35 and the second elongated structure 36 are parallel along their length and spaced vertically, forming a slide bar gap between them. One end of the first elongated structure 35 and the second elongated structure 36 is fixedly connected to the nut 33, and the other end of the first elongated structure 35 and the second elongated structure 36 is rotatably connected to the drive rod 22 via a pin. Through the slide bar 34, the kinetic energy output by the motor 31 is converted into linear thrust. The linear motion of the slide bar 34 is converted into the rotational force of the drive rod 22 via the pin, forming a force chain of "motor 31 → screw 32 → nut 33 → slide bar 34 → drive rod 22". This allows the operator to control the motor to start and stop without manually maintaining the applied force, thus transmitting the force to the torque wrench.

[0041] like Figure 3As shown, the guide structure 4 includes a first guide rail 41, a second guide rail 42 opposite to the first guide rail, and a support plate 43. One end of the upper part of the support plate 43 is fixedly connected to one end of the first guide rail 41, and the other end of the upper part of the support plate 43 is fixedly connected to one end of the second guide rail 42, so that the first guide rail 41, the second guide rail 42, and the support plate 43 together define an open space, the opening direction of which is away from the support plate 43. The end of the first guide rail 41 away from the support plate 43 is fixedly connected to a baffle 37, and the end of the second guide rail 42 away from the support plate 43 is fixedly connected to the baffle 37. The slide rod 34 is slidably engaged with the first guide rail 41. Through the sliding engagement of the slide rod gap formed between the double-elongated structure of the first guide rail 41 and the slide rod 34, a rigid guide system is formed, which allows the slide rod 34 to move along a fixed path during the application of force, ensuring that the direction of force application is precise and controllable, and preventing deviation or vibration.

[0042] A screw hole 44 is provided on the support plate 43, and the screw 32 passes through the screw hole 44. The screw hole 44 provides a passage for the screw 32 to pass through, ensuring that the screw 32 and the guide structure 4 are properly matched, and avoiding affecting the normal operation of the screw 32.

[0043] The torque wrench 1 also includes an alarm 14 that mates with the ratchet head 12. The alarm 14 is located inside the torque lever 11 near one end of the ratchet head 12. The alarm 14 is used to sound an alarm when the applied torque reaches a preset value, which can eliminate human judgment error and ensure that the bolt preload meets the design requirements.

[0044] In this implementation example, the railway locomotive torque wrench also includes a controller 5 and a start / stop button 6. The controller 5 is fixedly mounted on the torque rod 11, and the start / stop button 6 is fixedly mounted on the support 21. The controller 5 is connected to both the start / stop button 6 and the power unit 3. The controller 5 receives start / stop signals from the start / stop button 6 and controls the start / stop of the motor 31. The controller 5 can be a DAPTIQ 766 series controller. The start / stop button 6 serves as the physical interface for operation, triggering the motor 31 to start or stop with a single press, simplifying the operation process. Figure 5 As shown, after receiving the start signal from the start / stop button 6, the controller 5 transmits a start signal to the drive end of the motor 31, thereby causing the motor 31 to start working; after receiving the stop signal from the start / stop button 6, the controller 5 transmits a stop signal to the drive end of the motor 31, thereby causing the motor 31 to stop working.

[0045] In this embodiment, the controller is also connected to the alarm 14. The controller is also used to receive the alarm signal issued by the alarm 14 and control the power unit 3 to stop. After receiving the alarm signal from the alarm 14, the controller 5 transmits a stop signal to the drive end of the motor 31, thereby stopping the motor 31 from working.

[0046] In this embodiment, the working process of the torque wrench used by railway locomotive maintenance personnel is as follows:

[0047] Step 1: When tightening the nuts on the railway rails, first use the relevant power tools to tighten the nuts on the corresponding bolts, and then use a railway locomotive torque wrench for final fixing and calibration.

[0048] Step 2: First, place the tightening bracket 2 on one side of the bolt to be tightened, embed the ratchet head 12 of the torque wrench 1 into the nut, and at the same time, firmly embed the handle 13 into the support 23. Generally speaking, it is necessary to keep the torque wrench 1 roughly horizontal. If there is a horizontal deviation in actual use, you can choose to temporarily raise it to a certain extent under the support 21. After the assembly work is completed, carry out the final tightening work.

[0049] Step 3: Start motor 31. Under the rotation of screw 32, nut 33 drives slide bar 34 to cause drive rod 22 to rotate on one side of guide structure 4, so that torque wrench 1 rotates to the same degree around bolt, tightening nut on bolt. During operation, the operator's hands are positioned at ratchet head 12 and grip bar 13 at both ends of torque rod 11 for auxiliary preparation to avoid instability or other accidents during operation. When nut and bolt reach preset torque value, alarm in torque wrench 1 will sound and transmit stop command to motor 31 through controller 5. Motor 31 will stop running immediately. After completing a series of operations, remove torque wrench 1 and pick up tightening frame 2.

[0050] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "upper" and "lower" and "top" and "bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0051] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0052] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent structural transformations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A torque wrench for railway locomotive maintenance, characterized in that, include: A torque wrench (1) includes a torque rod (11), a ratchet head (12), and a handle (13). One end of the torque rod (11) is fixedly connected to the ratchet head (12), and the other end of the torque rod (11) is fixedly connected to the handle (13). The torque wrench (1) is supported and rotated by a torque wrench (2). The torque wrench (2) includes a support (21), a power unit (3), a drive rod (22), and a bracket (23). The power unit (3) is fixedly mounted on the support (21). One end of the drive rod (22) is rotatably connected to the power unit (3), and the other end of the drive rod (22) is rotatably connected to the bracket (23). The bracket (23) is detachably fixedly connected to the handle (13).

2. A torque wrench for railway locomotive maintenance according to claim 1, characterized in that: The support (23) includes a base plate (24) and two oppositely arranged side plates (25). The base plate (24) and the two side plates (25) form a U-shaped structure. The width of the U-shaped opening of the support (23) is adapted to the outer diameter of the handle (13). The handle (13) is engaged in the U-shaped opening of the support (23).

3. A torque wrench for railway locomotive maintenance according to claim 1, characterized in that: The power unit (3) includes a motor (31), a screw (32), a nut (33), a slide rod (34), a baffle (37), and a guide structure (4). The screw (32) and the nut (33) are threaded together. The nut (33) is fixedly connected to one end of the slide rod (34). One end of the screw (32) is fixedly connected to the output shaft of the motor (31). The other end of the screw (32) is rotatably connected to the baffle (37). The guide structure (4) is fixedly mounted on the support (21). The slide rod (34) is slidably connected to the guide structure (4), so that the slide rod (34) can move linearly along the guide structure (4). The motor (31) is fixedly mounted on one end of the support (21), and the baffle (37) is fixedly mounted on the other end of the support (21).

4. A torque wrench for railway locomotive maintenance according to claim 3, characterized in that: The slide bar (34) includes a first elongated structure (35) and a second elongated structure (36). The first elongated structure (35) and the second elongated structure (36) are parallel to each other and spaced apart. A slide bar gap is formed between the first elongated structure (35) and the second elongated structure (36). One end of the first elongated structure (35) and the second elongated structure (36) is fixedly connected to a nut (33). The other end of the first elongated structure (35) and the second elongated structure (36) is rotatably connected to a drive rod (22) through a pin.

5. A torque wrench for railway locomotive maintenance according to claim 3, characterized in that: The guide structure (4) includes a first guide rail (41), a second guide rail (42) opposite to the first guide rail (41), and a support plate (43). One end of the upper part of the support plate (43) is fixedly connected to one end of the first guide rail (41), and the other end of the upper part of the support plate (43) is fixedly connected to one end of the second guide rail (42), so that the first guide rail (41), the second guide rail (42), and the support plate (43) together define an open space. The opening direction of the open space is away from the support plate (43). The bottom of the support plate (43) is fixedly connected to the support (21). The end of the first guide rail (41) away from the support plate (43) is fixedly connected to the baffle (37). The end of the second guide rail (42) away from the support plate (43) is fixedly connected to the baffle (37). The slide rod (34) is slidably engaged with the first guide rail (41).

6. A torque wrench for railway locomotive maintenance according to claim 5, characterized in that: The support plate (43) has a screw hole (44) and the screw (32) passes through the screw hole (44).

7. A torque wrench for railway locomotive maintenance according to claim 1, characterized in that: The torque wrench (1) also includes an alarm (14) that cooperates with the ratchet head (12), the alarm (14) being disposed inside the torque lever (11) near one end of the ratchet head (12).

8. A torque wrench for railway locomotive maintenance according to claim 1, characterized in that: The railway locomotive torque wrench also includes a controller (5) and a start / stop button (6). The controller (5) is fixedly installed on the torque rod (11), and the start / stop button (6) is fixedly installed on the support (21). The controller (5) is connected to the start / stop button (6) and the power unit (3) respectively. The controller (5) is used to receive the start / stop signal from the start / stop button (6) and control the start / stop of the power unit (3).

9. A torque wrench for railway locomotive maintenance according to claim 7 or 8, characterized in that: The controller (5) is also connected to the alarm (14), and the controller (5) is also used to receive the alarm signal from the alarm (14) and control the power unit (3) to stop.

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