Torsion bar assembly device and method

Abstract

The application provides a torsion bar assembling device and method, which comprises a fixed shaft, a torsion arm of the torsion bar has a mounting hole, the torsion arm is adapted to be sleeved on the fixed shaft through the mounting hole; a positioning sleeve is internally provided with an assembly hole extending along the axial direction thereof, the positioning sleeve is sleeved on the fixed shaft through the assembly hole, and the outer peripheral wall of the positioning sleeve is embedded in the mounting hole, the positioning sleeve and the torsion arm are nested to limit the rotation of the torsion arm; and a locking handle is fixedly connected with the end of the fixed shaft towards the positioning sleeve, which is used for axially compressing the positioning sleeve, so that the positioning sleeve compresses the torsion arm. The application is used to solve the defects of the related art, such as the easy rotation of the suspended torsion arm during the torque marking operation, the poor assembly precision, and the like, to realize the reliable rotation stopping and fixing of the torsion arm during the torque marking process, and to improve the assembly precision and the operation safety of the torsion bar.

Description

Technical Field

[0001] This invention relates to the field of anti-roll torsion bar assembly, and provides a torsion bar assembly device and method. Background Technology

[0002] In the assembly of anti-roll torsion bars for rail vehicles, a torque marking process is required on the fastening bolts of the torsion arm, which involves using a torque wrench to tighten the bolts to the specified torque and making anti-loosening marks.

[0003] Under the current operating method, the torsion arm is suspended in the air and lacks effective positioning and fixing constraints. During the process of torque-engaging and tightening the bolts, the circumferential reaction force generated by the bolt tightening can easily cause the torsion arm to rotate and deflect. This not only causes the torsion arm assembly angle to deviate and affects the assembly accuracy of the torsion bar, but also poses a safety hazard of bumping into workers and causing personal injury when the torsion arm rotates. Summary of the Invention

[0004] This invention provides a torsion bar assembly device and method to solve the defects in related technologies, such as the torsion arm being prone to rotation when suspended during torque engraving operations, poor assembly accuracy, and personal safety hazards. It achieves reliable anti-rotation and fixation of the torsion arm during torque engraving, thereby improving the assembly accuracy and operational safety of the torsion bar.

[0005] This invention provides a torsion bar assembly device, comprising: A fixed shaft is provided, and the torsion arm of the torsion bar has a mounting hole, the torsion arm being adapted to be sleeved on the fixed shaft through the mounting hole; A positioning sleeve is provided inside which an assembly hole extends along its axial direction. The positioning sleeve is sleeved on the fixed shaft through the assembly hole, and the outer peripheral wall of the positioning sleeve is embedded in the mounting hole. The positioning sleeve is nested with the torsion arm to restrict the rotation of the torsion arm. A locking handle is fixedly connected to one end of the fixed shaft facing the positioning sleeve, and is used to axially press the positioning sleeve so that the positioning sleeve presses against the torsion arm.

[0006] According to one embodiment of the present invention, the mounting hole is a tapered hole, and the outer peripheral wall of the positioning sleeve is provided with a tapered surface that matches the taper of the mounting hole.

[0007] According to one embodiment of the present invention, the assembly hole is a tapered hole, and the fixed shaft is provided with a tapered surface that matches the taper of the assembly hole.

[0008] According to one embodiment of the present invention, a first baffle is provided on the fixed shaft, and one side of the torsion arm abuts against the first baffle; The positioning sleeve is provided with a second baffle at one end facing the locking handle, and the other side of the torsion arm abuts against the second baffle. And / or, the fixed shaft is provided with an internal thread, the locking handle is provided with an external thread, and the locking handle is threadedly connected to the fixed shaft.

[0009] According to one embodiment of the present invention, it further includes: a support plate and a support assembly, the support plate being mounted above the support assembly, the support plate being used to place and support the fixed shaft, and the support assembly being adapted to be placed on an operating table.

[0010] According to one embodiment of the present invention, the upper surface of the support plate is provided with a limiting groove for accommodating the fixed shaft; And / or, a height adjustment component is provided between the support plate and the support assembly for adjusting the height of the support plate; And / or, the support assembly includes a frame and rollers, the frame having a top plate and two opposing side plates, the top plate and the two side plates enclosing a receiving cavity, the support plate being fixed to the top plate, the rollers being disposed within the receiving cavity, a support shaft passing through the center of the rollers, and the two ends of the support shaft being fixed to the two side plates respectively.

[0011] According to one embodiment of the present invention, it further includes: a detection component, the detection component including a laser shaft and a detection sleeve, the laser shaft being adapted to be installed at one end of the fixed shaft away from the positioning sleeve, the laser shaft having a built-in laser lamp, the detection sleeve being adapted to be fitted into the mounting hole of another torsion arm on the opposite side of the torsion bar, and the laser emitted by the laser lamp being projected onto the detection sleeve.

[0012] According to one embodiment of the present invention, the detection sleeve includes a mounting part and a receiving part coaxially arranged. The mounting part is used to be fitted into the mounting hole, and the receiving part is connected to one end of the mounting part. The receiving part has multiple concentric circle marks arranged sequentially from the center outward on one side surface facing the laser axis.

[0013] This invention also provides a torsion bar assembly method, which, using the above-mentioned torsion bar assembly device, includes the following steps: The torsion arm on one side of the torsion bar is fitted onto the fixed shaft; A positioning sleeve is fitted onto the fixed shaft, and the outer peripheral wall of the positioning sleeve is fitted into the mounting hole of the torsion arm; The locking handle is fixedly connected to the fixed shaft, so that the locking handle axially presses against the positioning sleeve.

[0014] According to one embodiment of the present invention, the method further includes: mounting a laser shaft to the end of the fixed shaft away from the positioning sleeve, and mounting a detection sleeve into the mounting hole of another torsion arm on the opposite side of the torsion bar; Turn on the laser lamp inside the laser shaft to project a laser beam onto the detection sleeve, observe the projection position of the laser beam on the detection sleeve, and determine whether there is misalignment of the torsion arms at both ends.

[0015] The torsion bar assembly device and method provided by this invention achieves the positioning and installation of the torsion arm through a fixed shaft. The positioning sleeve is embedded in the mounting hole of the torsion arm and nests with the torsion arm, which can form a circumferential constraint on the torsion arm and restrict the rotation of the torsion arm. The locking handle is connected to the end of the fixed shaft and provides axial clamping force to press the positioning sleeve and thus press and lock the torsion arm. When performing torque engraving operations, this structure can counteract the circumferential reaction force generated by tightening the bolts, effectively preventing the torsion arm from deflecting and ensuring the assembly angle accuracy of the torsion arm. At the same time, the locking handle enables quick clamping and loosening, which facilitates the assembly and disassembly of the torsion bar workpiece and improves the assembly efficiency of the anti-roll torsion bar. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the torsion bar assembly device provided by the present invention.

[0018] Figure 2 These are two schematic diagrams of the torsion bar assembly device provided by the present invention.

[0019] Figure 3 This is a schematic flowchart of the torsion bar assembly method provided by the present invention.

[0020] Figure label: 100. Fixed shaft; 101. First stop plate; 110. Positioning sleeve; 111. Second stop plate; 120. Locking handle; 130. Support plate; 140. Support assembly; 141. Frame; 142. Roller; 143. Support shaft; 150. Screw; 151. Locking nut; 160. Detection sleeve; 161. Mounting part; 162. Receiving part; 170. Power switch. Detailed Implementation

[0021] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and 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. Therefore, they should not be construed as limitations on this invention.

[0023] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. 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 one or more embodiments or examples.

[0025] like Figure 1 and Figure 2 As shown, this embodiment of the invention provides a torsion bar assembly device to solve the problem of inaccurate torque marking in the assembly of traditional anti-roll torsion bars (hereinafter referred to as torsion bars), and is suitable for the assembly of railway vehicle bogies. This torsion bar assembly device can at least achieve stable positioning during torsion arm tightening, ensuring assembly quality, work efficiency, and personnel safety.

[0026] The torsion bar includes a torsion bar shaft and two torsion arms mounted at both ends of the torsion bar shaft. This torsion bar assembly device acts on the torsion arms to fix and prevent rotation, thereby ensuring accurate and stable torque engraving operations. One end of the torsion arm is provided with a connecting part, which is used to engage with the spline of the torsion bar shaft; the other end of the torsion arm has a mounting hole, which provides the assembly positioning basis for this tooling.

[0027] like Figure 1 As shown, the torsion bar assembly device includes: a fixed shaft 100, a positioning sleeve 110, and a locking handle 120. The fixed shaft 100 provides a mounting base, and the torsion arm can be sleeved onto the fixed shaft 100 through its mounting hole. The positioning sleeve 110 has an axially extending mounting hole inside, and the positioning sleeve 110 is sleeved onto the fixed shaft 100 through the mounting hole. The outer peripheral wall of the positioning sleeve 110 is embedded in the mounting hole, and the positioning sleeve 110 and the torsion arm are nested together to restrict the rotation of the torsion arm. The locking handle 120 is fixedly connected to one end of the fixed shaft 100 facing the positioning sleeve 110, and is used to axially press the positioning sleeve 110, so that the positioning sleeve 110 presses the torsion arm, thereby realizing the axial locking and anti-rotation limit of the torsion arm.

[0028] The locking handle 120 and the fixed shaft 100 can be assembled by threaded connection. For example, the fixed shaft 100 is provided with an internal thread at its end, and the locking handle 120 is provided with a matching external thread. By rotating the locking handle 120, the locking handle 120 is fed axially along the fixed shaft 100 by relying on the thread pair to complete the pressing or loosening action, making the disassembly and assembly operation convenient.

[0029] According to one embodiment of the present invention, the mounting hole is a tapered hole, and the outer peripheral wall of the positioning sleeve 110 is provided with a tapered surface that matches the taper of the mounting hole.

[0030] Specifically, along the axial direction of the fixed shaft 100 (or the thickness direction of the torsion arm), the inner diameter of the mounting hole is gradually changed along the axial direction, gradually expanding or shrinking from one side of the hole to the other; the outer peripheral wall of the positioning sleeve 110 is provided with an outer conical surface that matches the taper of the mounting hole. After assembly, the conical surfaces fit together, and the centering and radial clamping are achieved by relying on the conical surfaces, thereby improving the coaxiality of the positioning sleeve 110 and the mounting hole of the torsion arm.

[0031] Furthermore, a disc spring washer can be provided between the locking handle 120 and the positioning sleeve 110. When the locking handle 120 is pressed, the disc spring washer provides elastic preload. When the conical surface wears down after long-term use, the disc spring can compensate for the wear, maintain the axial clamping force, ensure that the conical surface is always effectively clamped, and reduce the frequency of regular maintenance of the tooling.

[0032] According to one embodiment of the present invention, the assembly hole is a tapered hole, and the fixed shaft 100 is provided with a tapered surface that matches the taper of the assembly hole. Through the fit of the tapered surface, it can be ensured that the axes of the fixed shaft 100 and the positioning sleeve 110 coincide, thereby forming a reliable clamping and fixing of the torsion arm.

[0033] In a preferred embodiment, the positioning sleeve 110 adopts a double-conical structure. The mounting hole of the positioning sleeve 110 is an inner conical hole, and the outer peripheral wall of the positioning sleeve 110 is an outer conical surface. During assembly, the inner conical hole of the positioning sleeve 110 engages with the outer conical surface of the fixed shaft 100, while the outer conical surface of the positioning sleeve 110 engages with the conical hole of the torsion arm mounting hole, thus forming a double-conical clamping fit structure. This double-conical fit structure improves the coaxiality among the fixed shaft 100, the positioning sleeve 110, and the torsion arm. Testing shows that the coaxiality can be stably controlled at 0.01mm, effectively suppressing circumferential rotation of the torsion arm during torque engraving operations and ensuring the accuracy and stability of torque engraving. The double-conical locking method of fixed shaft 100-positioning sleeve 110 and positioning sleeve 110-torsion arm provides high centering accuracy and reliable clamping effect, which is beneficial for improving the stability and efficiency of torque engraving operations.

[0034] It is understandable that the positioning sleeve 110 can be configured with different taper sizes according to different models and specifications of torsion arms, so as to achieve compatibility of workpieces of multiple specifications.

[0035] In addition to the frictional anti-rotation method of conical clamping, the positioning sleeve 110 and the torsion arm can also be equipped with a mechanical anti-rotation structure. For example, the positioning sleeve 110 has a flat portion on its outer periphery, and the inner wall of the mounting hole of the torsion arm has a matching flat groove. When the positioning sleeve 110 is inserted into the mounting hole, the flat portion engages with the flat groove, forming a lock to achieve mechanical anti-rotation. Even under high-torque engraving conditions, slippage and rotation of the torsion arm can be prevented. It is understood that this mechanical anti-rotation structure can be used in combination with the aforementioned double-cone clamping structure, or it can be used alone.

[0036] According to one embodiment of the present invention, a first baffle 101 is provided on the fixed shaft 100, and one side of the torsion arm abuts against the first baffle 101; a second baffle 111 is provided at one end of the positioning sleeve 110 facing the locking handle 120, and the other side of the torsion arm abuts against the second baffle 111.

[0037] like Figure 1 As shown, after the torsion arm is assembled, the two end faces of the torsion arm are axially abutted by the first stop plate 101 and the second stop plate 111 respectively, thereby realizing the bidirectional axial stop and limit of the torsion arm and preventing the torsion arm from axially moving during the tooling locking process.

[0038] For example, both the first baffle 101 and the second baffle 111 can adopt an annular disc structure; the first baffle 101 can be integrally formed with the fixed shaft 100 or it can be an independent machined part, which is fixed to the fixed shaft 100 by interference fit, welding or fasteners; similarly, the second baffle 111 can be integrally formed with the positioning sleeve 110 or it can be fixedly installed at the end of the positioning sleeve 110 as an independent part.

[0039] Optionally, a nylon buffer pad is provided on the end face of the first baffle 101 and the second baffle 111 facing the torsion arm. When locking and pressing, the buffer pad plays a buffering and protective role, avoiding metal-to-metal contact that could damage the end face of the torsion arm, while increasing the friction coefficient of the contact surface and helping to suppress the rotation of the torsion arm.

[0040] According to one embodiment of the present invention, the torsion bar assembly device further includes a support plate 130 and a support assembly 140, the support plate 130 being mounted above the support assembly 140, the support plate 130 being used to place and support the fixed shaft 100, and the support assembly 140 being adapted to be placed on an operating table.

[0041] like Figure 1 As shown, the fixed shaft 100 has a certain length. One end is equipped with a torsion arm, a positioning sleeve 110, and a locking handle 120, while the other end is placed and supported on a support plate 130 to prevent the fixed shaft 100 from being suspended in the air, further ensuring the stability of the torsion arm's positioning. The support assembly 140 is placed on the operating table, allowing the support plate 130 to be adapted to the height of the mounting holes. By providing auxiliary support to the fixed shaft 100, the impact load generated by the torque tightening operation can be buffered, further stabilizing the torque-engraving operation.

[0042] Furthermore, the upper surface of the support plate 130 is provided with a limiting groove to accommodate the fixed shaft 100. The limiting groove can restrict the fixed shaft 100 from radial slippage and positional displacement. For example, the limiting groove is an arc-shaped limiting groove, and the arc-shaped contour is adapted to the outer circle of the fixed shaft 100. Optionally, an anti-slip structure, such as a rubber anti-slip pad or anti-slip knurling, can be added between the fixed shaft 100 and the limiting groove to further improve the placement stability.

[0043] Furthermore, a height adjustment component is provided between the support plate 130 and the support assembly 140 to adjust the height of the support plate 130, thereby adapting to the working height requirements of different specifications of torsion arms.

[0044] like Figure 2As shown, exemplarily, the height adjustment assembly includes a screw 150 and locking nuts 151. A support plate 130 passes through the upper end of the screw 150, and the lower end of the screw 150 is connected to the support assembly 140. Locking nuts 151, sleeved on the screw 150, are disposed on both the upper and lower sides of the support plate 130. By loosening and tightening the locking nuts 151 on both sides, the installation position of the support plate 130 on the screw 150 can be adjusted, thereby adjusting the height of the support plate 130. After the height adjustment is completed, locking the locking nuts 151 on both sides locks the position, adapting to the assembly conditions of different workpieces.

[0045] Furthermore, the support assembly 140 includes a frame 141 and a roller 142. The frame 141 has a top plate and two opposing side plates. The top plate and the two side plates enclose a receiving cavity. The support plate 130 is fixed to the top plate. The roller 142 is disposed in the receiving cavity. A support shaft 143 passes through the center of the roller 142. The two ends of the support shaft 143 can be fixed to the two side plates respectively by bolts.

[0046] like Figure 2 As shown, exemplarily, the frame 141 adopts a U-shaped structure with its U-shaped opening facing downwards, facilitating the insertion of the roller 142 into the receiving cavity from the opening side. With the roller 142 installed, the support assembly 140, together with the support plate 130, can slide as a whole, allowing for flexible adjustment of the tooling's working position on the frame surface as needed during operation. The roller 142 can be made of nylon, which, while providing sliding support, prevents the roller 142 from directly contacting and scratching the frame's paint and metal surfaces.

[0047] Optionally, the roller 142 is equipped with a brake pad. When the tooling slides to the target working position, the brake pad locks the roller 142 to prevent the tooling from shifting due to torque impact. When it needs to be moved, the brake pad can be released to allow it to slide again, avoiding detection errors and positioning failures caused by tooling slippage during the operation.

[0048] According to one embodiment of the present invention, the torsion bar assembly device further includes a detection component, which includes a laser shaft and a detection sleeve 160. The laser shaft is adapted to be installed at the end of the fixed shaft 100 away from the positioning sleeve 110. The laser shaft has a built-in laser lamp. The detection sleeve 160 is adapted to be fitted into the mounting hole of another torsion arm on the opposite side of the torsion bar. The laser emitted by the laser lamp can be projected onto the detection sleeve 160. Exemplarily, the laser shaft is connected to the end of the fixed shaft 100 via an M6 internal thread, and has a built-in 3V low-voltage laser lamp, the start and stop of which are controlled by a matching switch.

[0049] Since each torsion bar shaft is equipped with two torsion arms, in the traditional assembly method, after the two torsion arms are fitted onto the spline of the torsion bar shaft, the operator cannot visually determine whether the two torsion arms are angularly aligned, which easily leads to misalignment of the torsion arms during assembly. The alignment of the center lines of the two torsion arms is judged by visual observation, which is difficult to detect and prone to errors. Once the torque is applied and locked, the misalignment is discovered, and the meshing position between the spline of the torsion bar shaft and the torsion arm is already locked. Disassembly and rework are the only options, which can easily damage the spline and render it unusable.

[0050] This embodiment adds a detection component, which can replace manual visual inspection and realize intuitive detection of torsion arm misalignment with high detection accuracy. By completing the misalignment verification before torque marking and locking, the rework and repair problems caused by discovering the misalignment after assembly are avoided.

[0051] The specific operating procedure is as follows: Before using the fixture, first install the two torsion arms onto the splined positions at both ends of the torsion bar shaft (at this time, the torsion arms are not yet torque-locked); assemble the fixed shaft 100, positioning sleeve 110, and locking handle 120 of this fixture onto one side of the torsion arm to complete the anti-rotation fixation; and use the support plate 130 and support assembly 140 to provide auxiliary support for the fixed shaft 100; install the laser shaft onto the end of the fixed shaft 100 away from the positioning sleeve 110, and then assemble the detection sleeve 160 into the mounting hole of the other torsion arm on the opposite side; after assembly, turn on the laser lamp, and the laser beam emitted by the laser shaft is projected onto the surface of the detection sleeve 160. Since the fixture, the torsion arm mounting hole, and the detection sleeve 160 are coaxial, when the laser spot falls on the center position of the detection sleeve 160, it indicates that there is no angular misalignment in the assembly of the two torsion arms; if the spot deviates from the center, it indicates that there is angular misalignment in the two torsion arms. Only after confirming that there is no misalignment can the torque engraving operation be carried out. Once the torque engraving is complete, turn off the laser light, loosen the locking handle 120, and disassemble the positioning sleeve 110 and the fixed shaft 100 in sequence to complete the single-sided assembly.

[0052] Furthermore, the detection component also includes a power switch 170, which is electrically connected to the laser light. The power switch 170 can be arranged, for example, on the support plate 130, so that the operator can operate it nearby and realize one-button start and stop of the laser light.

[0053] Furthermore, the detection sleeve 160 includes a mounting part 161 and a receiving part 162 arranged coaxially. The mounting part 161 is used to fit into the mounting hole, and the receiving part 162 is connected to one end of the mounting part 161. The side surface of the receiving part 162 facing the laser axis is provided with multiple concentric circle marks arranged sequentially from the center outward.

[0054] like Figure 2As shown, the outer diameter of the mounting part 161 is adapted to the mounting hole of the torsion arm, ensuring that the detection sleeve 160 remains coaxial with the mounting hole of the torsion arm after assembly. The receiving part 162 is a circular plate structure with multiple concentric circles on the plate surface. Each concentric circle corresponds to a preset misalignment angle value. The scale is pre-calibrated to correspond to the misalignment of the torsion bar shaft spline and the internal gear of the torsion arm.

[0055] When the laser spot is projected onto the center of the detection sleeve 160, it indicates that there is no misalignment between the two torsion arms. When the spot falls on a certain concentric circle on the outer ring, the operator can read the corresponding angular misalignment based on the scale of the concentric circle where the spot is located. The operator can then fine-tune the relative meshing position of the torsion arm and the spline of the torsion bar shaft according to the misalignment until the laser spot falls to the center scale. After confirming that the two torsion arms are aligned and there is no misalignment, the torque engraving and locking are then performed.

[0056] In an alternative embodiment, a laser crosshair light source can also be used, with the crosshair laser projected onto the detection sleeve 160. In addition to angular misalignment, radial offset can also be identified simultaneously, further enhancing the detection capability. The detection sleeve 160 is not limited to having a concentric circle scale plate; it can also use an angle scale dial to directly read the specific misalignment angle value.

[0057] In one embodiment, the mounting portion 161 of the detection sleeve 160 is provided with a foolproof boss, and the torsion arm mounting hole is provided with a corresponding foolproof notch; the detection sleeve 160 can only be installed into the mounting hole when the foolproof boss is aligned with the notch, so as to avoid the detection sleeve 160 being assembled in reverse and causing misjudgment in laser detection.

[0058] The torsion bar assembly device of this invention can simultaneously solve three major technical problems: torsion arm fastening and anti-rotation, precise torque marking control, and torsion arm assembly misalignment detection. It can adapt to the narrow assembly space of anti-roll torsion bars in urban rail transit and EMU trains, and is compatible with torsion arms of various structural specifications. The overall fixture structure is stable, easy to operate, and has high detection accuracy, which can reduce on-site operation risks. The fixture can rigidly fix the workpiece, eliminating the need for operators to hold the heavy torsion bar workpiece during operation, reducing labor intensity, and avoiding personal injury risks caused by workpiece falling or accidental rotation of the torsion arm. At the same time, the auxiliary support structure buffers the impact of torque fastening, further improving assembly stability and effectively improving the overall assembly operation efficiency.

[0059] The torsion bar assembly device of the present invention is not limited to the assembly of anti-roll torsion bars for rail vehicles, but can also be applied to the assembly of other heavy-duty shaft-type workpieces with spline connection, torque fastening, and angle alignment requirements.

[0060] like Figure 3 As shown, this embodiment of the invention also provides a torsion bar assembly method. Using the aforementioned torsion bar assembly device, the torsion bar assembly method includes the following steps: S1. Sleeve the torsion arm on one side of the torsion bar onto the fixed shaft 100; Specifically, the torsion arm, which has been pre-fitted onto the spline of the torsion bar shaft, is inserted into the mounting hole of the torsion arm by the fixed shaft 100, thus completing the initial placement of the torsion arm on the fixed shaft 100. This allows the torsion arm to abut against the first retaining plate 101 of the fixed shaft 100, completing the initial positioning of the torsion arm.

[0061] S2. Fit the positioning sleeve 110 onto the fixed shaft 100, and fit the outer peripheral wall of the positioning sleeve 110 into the mounting hole of the torsion arm. Specifically, the positioning sleeve 110 is fitted onto the fixed shaft 100 along the axial direction of the fixed shaft 100, and the positioning sleeve 110 is pushed towards the torsion arm, so that the outer peripheral wall of the positioning sleeve 110 is embedded in the mounting hole of the torsion arm, thus forming a nested fit between the positioning sleeve 110 and the torsion arm. Preferably, a tapered positioning sleeve 110 is used, so that the outer tapered surface of the positioning sleeve 110 fits snugly against the tapered surface of the mounting hole of the torsion arm.

[0062] S3. Fix the locking handle 120 to the fixed shaft 100 so that the locking handle 120 axially presses the positioning sleeve 110.

[0063] Specifically, the locking handle 120 is aligned with the end of the fixed shaft 100 and assembled using threads. The locking handle 120 is rotated, and the locking handle 120 is fed axially along the fixed shaft 100 using the threaded pair, applying axial pressure to the positioning sleeve 110. The positioning sleeve 110 is pressed against the torsion arm by the axial pressure, and the torsion arm is axially limited in both directions by the stop plate. At the same time, the circumferential rotation of the torsion arm is constrained by the nested fit, completing the anti-rotation locking of the torsion arm and preparing for the subsequent torque engraving operation.

[0064] Furthermore, while performing steps S1 to S3, the height of the support plate 130 can be adjusted by adjusting the height adjustment component, so that the support plate 130 can stably support the fixed shaft 100, the support component 140 is placed on the frame surface, and the roller 142 fits against the frame, thus completing the overall support and positioning of the tooling.

[0065] According to one embodiment of the present invention, the torsion bar assembly method further includes the following detection step: S4. Install the laser shaft to the end of the fixed shaft 100 away from the positioning sleeve 110, and install the detection sleeve 160 into the mounting hole of the other torsion arm on the opposite side of the torsion bar. S5. Turn on the laser lamp inside the laser shaft to project a laser beam onto the detection sleeve 160. Observe the projection position of the laser beam on the detection sleeve 160 to determine whether there is misalignment of the torsion arms at both ends.

[0066] Specifically, turn on the power switch 170 to make the laser lamp emit a laser beam, observe the projection position of the laser beam on the detection sleeve 160. If the laser spot falls on the center position of the detection sleeve 160, it is determined that the assembly of the two torsion arms is not misaligned; if the spot deviates from the center, read the concentric circle scale corresponding to the spot to obtain the misalignment amount, adjust the relative position of the torsion arm and the spline of the torsion bar shaft, and re-verify until the spot falls on the center position of the detection sleeve 160.

[0067] After the misalignment check is passed, torque marking is performed on the torsion arm fixed in the current fixture. After the torque marking is completed, the laser switch is turned off, the locking handle 120 is released, and the positioning sleeve 110 and the fixed shaft 100 are removed in sequence to complete the assembly of the single-sided torsion arm.

[0068] When assembling the other side of the torsion arm, repeat the above tooling assembly process; fix the tooling to the torsion arm to be assembled, assemble the test sleeve 160 to the torsion arm on the side that has been torque locked, perform laser misalignment verification again, and perform torque engraving operation on the torsion arm on that side after the verification is qualified.

[0069] The torsion bar assembly device and method provided by this invention achieves the positioning and installation of the torsion arm through a fixed shaft 100. A positioning sleeve 110 is embedded in the mounting hole of the torsion arm and nested with it, forming a circumferential constraint on the torsion arm and restricting its rotation. A locking handle 120 is connected to the end of the fixed shaft 100 and provides axial clamping force, pressing the positioning sleeve 110 to lock the torsion arm. During torque engraving operations, this structure can counteract the circumferential reaction force generated by tightening the bolts, effectively preventing the torsion arm from rotating and ensuring the accuracy of the torsion arm assembly angle. Simultaneously, the locking handle 120 enables rapid clamping and loosening, facilitating the assembly and disassembly of the torsion bar workpiece and improving the assembly efficiency of the anti-roll torsion bar.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A torsion bar assembly device, characterized in that, include: A fixed shaft is provided, and the torsion arm of the torsion bar has a mounting hole, the torsion arm being adapted to be sleeved onto the fixed shaft through the mounting hole; A positioning sleeve is provided inside which an assembly hole extends along its axial direction. The positioning sleeve is sleeved on the fixed shaft through the assembly hole, and the outer peripheral wall of the positioning sleeve is embedded in the mounting hole. The positioning sleeve is nested with the torsion arm to restrict the rotation of the torsion arm. A locking handle is fixedly connected to one end of the fixed shaft facing the positioning sleeve, and is used to axially press the positioning sleeve so that the positioning sleeve presses against the torsion arm.

2. The torsion bar assembly device according to claim 1, characterized in that, The mounting hole is a tapered hole, and the outer peripheral wall of the positioning sleeve is provided with a tapered surface that matches the taper of the mounting hole.

3. The torsion bar assembly device according to claim 1 or 2, characterized in that, The assembly hole is a tapered hole, and the fixed shaft is provided with a tapered surface that matches the taper of the assembly hole.

4. The torsion bar assembly device according to claim 1, characterized in that, A first baffle is provided on the fixed shaft, and one side of the torsion arm abuts against the first baffle. The positioning sleeve is provided with a second baffle at one end facing the locking handle, and the other side of the torsion arm abuts against the second baffle. And / or, the fixed shaft is provided with an internal thread, the locking handle is provided with an external thread, and the locking handle is threadedly connected to the fixed shaft.

5. The torsion bar assembly device according to claim 1, characterized in that, Also includes: A support plate and a support assembly, wherein the support plate is mounted on top of the support assembly, the support plate is used to place and support the fixed shaft, and the support assembly is adapted to be placed on an operating table.

6. The torsion bar assembly device according to claim 5, characterized in that, The upper surface of the support plate is provided with a limiting groove to accommodate the fixed shaft; And / or, a height adjustment component is provided between the support plate and the support assembly for adjusting the height of the support plate; And / or, the support assembly includes a frame and rollers, the frame having a top plate and two opposing side plates, the top plate and the two side plates enclosing a receiving cavity, the support plate being fixed to the top plate, the rollers being disposed within the receiving cavity, a support shaft passing through the center of the rollers, and the two ends of the support shaft being fixed to the two side plates respectively.

7. The torsion bar assembly device according to any one of claims 1, 2, 4-6, characterized in that, Also includes: The detection assembly includes a laser shaft and a detection sleeve. The laser shaft is adapted to be installed at the end of the fixed shaft away from the positioning sleeve. The laser shaft has a built-in laser lamp. The detection sleeve is adapted to be fitted into the mounting hole of another torsion arm on the opposite side of the torsion bar. The laser emitted by the laser lamp can be projected onto the detection sleeve.

8. The torsion bar assembly device according to claim 7, characterized in that, The detection sleeve includes a mounting part and a receiving part arranged coaxially. The mounting part is used to fit into the mounting hole, and the receiving part is connected to one end of the mounting part. The surface of the receiving part facing the laser axis is provided with multiple concentric circle marks arranged sequentially from the center outward.

9. A method for assembling a torsion bar, characterized in that, The torsion bar assembly device according to any one of claims 1-8 comprises the following steps: The torsion arm on one side of the torsion bar is fitted onto the fixed shaft; A positioning sleeve is fitted onto the fixed shaft, and the outer peripheral wall of the positioning sleeve is fitted into the mounting hole of the torsion arm; The locking handle is fixedly connected to the fixed shaft, so that the locking handle axially presses against the positioning sleeve.

10. The torsion bar assembly method according to claim 9, characterized in that, Also includes: Install the laser shaft to the end of the fixed shaft away from the positioning sleeve, and install the detection sleeve into the mounting hole of the other torsion arm on the opposite side of the torsion bar; Turn on the laser lamp inside the laser shaft to project a laser beam onto the detection sleeve, observe the projection position of the laser beam on the detection sleeve, and determine whether there is misalignment of the torsion arms at both ends.

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