A transmission shaft mounting positioning tool

Abstract

The embodiment of the utility model provides a kind of transmission shaft installation positioning tool, it is related to transmission shaft installation technical field.Transmission shaft installation positioning tool includes positioning axle body.The both ends of positioning axle body are provided with first installation flange and second installation flange respectively.First installation flange is used to be connected with first equipment, and second installation flange is used to be connected with second equipment.Positioning axle body is provided with length adjusting mechanism, for adjusting the length of positioning axle body.First equipment and second equipment are the cross universal joint of transmission shaft both ends.The utility model can quickly calibrate the coaxial degree of cross universal joint both ends, and it is convenient for subsequent installation transmission shaft.

Description

Technical Field

[0001] This utility model relates to the field of drive shaft installation technology, and more specifically, to a drive shaft installation and positioning fixture. Background Technology

[0002] Current automotive chassis driveshafts generally adopt a double cross-shaft universal joint structure, consisting of input and output flanges, universal joints, splined shafts, and bushings. Although this structure can achieve power transmission and allow for a certain degree of angular offset and axial expansion, it presents significant technical challenges during installation: to ensure smooth transmission, the cross axes of the input and output flanges must be strictly in the same plane, and their coaxiality deviation must be controlled within a very small range (-1.5° to +1.5°).

[0003] However, in a chassis environment with limited space, it is extremely difficult to rely entirely on manual experience for installation and adjustment. This is not only time-consuming and labor-intensive, but also makes it difficult to guarantee accuracy. Utility Model Content

[0004] The purpose of this utility model is to provide a drive shaft mounting and positioning fixture that can quickly calibrate the coaxiality of the universal joints at both ends, facilitating subsequent installation of the drive shaft.

[0005] The embodiments of this utility model can be implemented as follows: This utility model provides a drive shaft mounting and positioning fixture, including: The positioning shaft has a first mounting flange and a second mounting flange at its two ends. The first mounting flange is used to connect to a first device, and the second mounting flange is used to connect to a second device. The positioning shaft is provided with a length adjustment mechanism for adjusting the length of the positioning shaft.

[0006] In an optional embodiment, the positioning shaft includes a first shaft portion and a second shaft portion. One end of the first shaft portion is connected to the first mounting flange, and one end of the second shaft portion is connected to the second mounting flange. The other end of the second shaft portion is provided with a cavity. The end of the first shaft portion away from the first mounting flange extends into the cavity and is able to extend and retract relative to the second shaft portion. A first positioning element is provided at the end of the first shaft portion near the second shaft portion, and a second positioning element is provided at the end of the second shaft portion near the first shaft portion, so as to fix the axial position of the first shaft portion and the second shaft portion.

[0007] In an optional embodiment, the first positioning element is an external threaded section, and the second positioning element is an internal threaded sleeve. The external threaded section and the internal threaded sleeve cooperate with each other, and the first shaft portion and the second shaft portion are connected by the screwing of the external threaded section and the internal threaded sleeve to adjust the length of the positioning shaft body.

[0008] In an optional embodiment, the length of the external threaded segment along the axial direction of the first shaft portion is greater than the length of the internal threaded sleeve along the axial direction of the second shaft portion.

[0009] In an optional embodiment, the cavities of the first shaft portion and the second shaft portion are clearance-fitted.

[0010] In an optional embodiment, the first positioning member is provided with a first positioning hole spaced apart along the axial direction of the first shaft portion, and the second positioning member is provided with a second positioning hole spaced apart along the axial direction of the second shaft portion. The pin passes through the first positioning hole and the second positioning hole in sequence to fix the axial position of the first shaft portion and the second shaft portion.

[0011] In an optional embodiment, the first mounting flange is provided with a first positioning stop, and the second mounting flange is provided with a second positioning stop.

[0012] In an optional embodiment, the first positioning stop is a circular groove, and the second positioning stop is a circular boss.

[0013] In an optional embodiment, the positioning shaft, the first mounting flange, and the second mounting flange are all made of rigid metal material.

[0014] In an optional embodiment, a first reinforcing member is provided between the positioning shaft and the first mounting flange, and a second reinforcing member is provided between the positioning shaft and the mounting flange.

[0015] The beneficial effects of the drive shaft mounting and positioning fixture provided in this embodiment of the present invention include: The drive shaft installation and positioning fixture provided by this utility model includes a positioning shaft body. A first mounting flange and a second mounting flange are respectively provided at both ends of the positioning shaft body. The first mounting flange is used to connect to a first device, and the second mounting flange is used to connect to a second device. A length adjustment mechanism is provided on the positioning shaft body for adjusting the length of the positioning shaft body. The first device and the second device are universal joints at both ends of the drive shaft. Before installing the drive shaft, the universal joints at both ends are calibrated and positioned by connecting the first and second positioning flanges respectively, ensuring the coaxiality of the universal joints at both ends and ensuring that their cross axes are in the same plane. This fixture, as an auxiliary tool, greatly simplifies the subsequent installation process of the actual drive shaft, achieving fast and reliable installation. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the drive shaft mounting and positioning fixture provided in this embodiment; Figure 2 This is a schematic diagram of the structure of the first shaft and the first mounting flange provided in this embodiment; Figure 3 This is a schematic diagram of the structure of the second shaft and the second mounting flange provided in this embodiment.

[0018] Icons: 100 - Drive shaft mounting and positioning fixture; 10 - Positioning shaft body; 11 - First shaft part; 111 - External thread section; 12 - Second shaft part; 121 - Cavity; 122 - Internal thread sleeve; 20 - First mounting flange; 21 - First positioning stop; 22 - First reinforcing member; 30 - Second mounting flange; 31 - Second positioning stop; 32 - Second reinforcing member. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments 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.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model.

[0023] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0024] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0025] The following describes in detail the overall structure, working principle, and technical effects of the drive shaft installation and positioning fixture provided by this utility model through embodiments and in conjunction with the accompanying drawings.

[0026] Please refer to Figures 1-3 The drive shaft installation and positioning fixture 100 provided by this utility model is used to calibrate and position the universal joints at both ends of the drive shaft before installation.

[0027] This drive shaft mounting and positioning fixture 100 includes a positioning shaft body 10. A first mounting flange 20 and a second mounting flange 30 are respectively provided at both ends of the positioning shaft body 10. The first mounting flange 20 is used for connection to a first device. The second mounting flange 30 is used for connection to a second device. A length adjustment structure is provided on the positioning shaft body 10. The length adjustment mechanism is used to adjust the length of the positioning shaft body 10.

[0028] Specifically, in this embodiment, the first device and the second device are universal joints installed at both ends of the actual drive shaft. Before installing the drive shaft, the universal joints need to be calibrated and positioned to ensure the coaxiality of the universal joints at both ends, so that the drive shaft can be directly placed between the universal joints to connect the drive shaft and the universal joints. The drive shaft installation and positioning fixture 100 provided in this embodiment can quickly calibrate and position the universal joints at both ends, so that the drive shaft can be directly installed after the drive shaft installation and positioning fixture 100 is removed.

[0029] This drive shaft mounting and positioning fixture 100, through its rigid positioning shaft 10 and mounting flanges at both ends, can quickly connect with the mounting interface of the universal joint drive shaft; by setting a precisely adjustable length adjustment mechanism, the overall length of the fixture can be conveniently adjusted within the installation space, so that it can connect the two ends of the equipment in a stress-free state.

[0030] Specifically, the positioning shaft 10 includes a first shaft portion 11 and a second shaft portion 12. One end of the first shaft portion 11 is connected to a first mounting flange 20. One end of the second shaft portion 12 is connected to a second mounting flange 30, and the other end of the second shaft portion 12 is provided with a cavity 121. The end of the first shaft portion 11 away from the first mounting flange 20 extends into the cavity 121 and is telescopic relative to the second shaft portion 12. A first positioning element is provided at the end of the first shaft portion 11 near the second shaft portion 12, and a second positioning element is provided at the end of the second shaft portion 12 near the first shaft portion 11, to fix the axial position of the first shaft portion 11 and the second shaft portion 12.

[0031] Understandably, in this embodiment, the end of the second shaft portion 12 furthest from the second mounting flange 30 is configured as a sleeve structure. The second shaft portion 12 is sleeved on the first shaft portion 11, allowing the first shaft portion 11 to slide within the cavity 121, thereby adjusting the length of the entire positioning shaft 10. By setting the interlocking first shaft portion 11 and second shaft portion 12, along with the matching positioning components, stepless or stepped precision adjustment of the length of the positioning shaft 10 can be achieved, thus accurately adapting to different installation spacings and ensuring a stress-free, highly coaxial rigid connection between the tooling and the equipment at both ends, providing a stable foundation for phase calibration.

[0032] Specifically, in this embodiment, the length adjustment mechanism is a stepless adjustment mechanism. The first positioning element is an external thread section 111. The second positioning element is an internal thread sleeve 122. The external thread section 111 and the internal thread sleeve 122 cooperate with each other, and the first shaft portion 11 and the second elbow portion are connected by the screwing of the external thread section 111 and the internal thread sleeve 122 to adjust the length of the positioning shaft 10. By setting the mutually cooperating external thread section 111 and internal thread sleeve 122 to form a stepless adjustment mechanism, continuous and precise fine-tuning of the length of the positioning shaft 10 can be achieved, thereby flexibly adapting to different installation space dimensions and ensuring that the flanges at both ends and the equipment interface achieve precise zero-gap docking, providing a high-precision length reference for forced calibration of the universal joint phase.

[0033] Furthermore, the length of the external thread section 111 along the axial direction of the first shaft portion 11 is greater than the length of the internal thread sleeve 122 along the axial direction of the second shaft portion 12. By setting the external thread section 111, which is longer than the internal thread sleeve 122, the effective engagement stroke of the thread can be significantly increased, thereby enabling a wider range of length adjustment and enhancing the adaptability of the tooling to installation distances between different vehicle models or equipment.

[0034] In this embodiment, the cavities 121 of the first shaft portion 11 and the second shaft portion 12 are clearance-fitted. By setting the clearance-fitted cavity 121 structure, the first shaft portion 11 can move smoothly axially within the second shaft portion 12, thereby ensuring a smooth and unobstructed thread adjustment process, while effectively suppressing radial wobble and maintaining the stability of the coaxiality of the first shaft portion 11 and the second shaft portion 12 during the adjustment process.

[0035] In another embodiment of this utility model, the length adjustment mechanism is a graded adjustment mechanism. Specifically, the first positioning member has first positioning holes spaced apart along the axial direction of the first shaft portion 11. The second positioning member has second positioning holes spaced apart along the axial direction of the second shaft portion 12. A pin passes through the first positioning hole and the second positioning hole in sequence to fix the axial position of the first shaft portion 11 and the second shaft portion 12. By providing a graded adjustment mechanism composed of spaced positioning holes and pins, the length of the positioning shaft 10 can be quickly and reliably fixed, thereby providing multiple definite length selections for different specifications of installation spacing while ensuring rigidity and coaxiality, simplifying the adjustment operation.

[0036] Furthermore, the positioning shaft 10, the first mounting flange 20, and the second mounting flange 30 are all made of rigid metal materials. Specifically, in this embodiment, the positioning shaft 10, the second mounting flange 30, and the second mounting flange 30 are made of high-strength alloy structural steel, possessing extremely high rigidity modulus and bending strength. By setting the rigid positioning shaft 10 made of high-strength alloy structural steel, it can effectively resist the bending stress and torque deformation generated during installation, thereby providing a stable and reliable rigid reference for the universal joints at both ends, ensuring that the phase calibration accuracy is not affected by the deformation of the tooling itself.

[0037] Alternatively, in other embodiments, the positioning shaft 10, the first mounting flange 20, and the second mounting flange 30 may also be made of other rigid metal materials, such as high-strength aluminum alloy, titanium alloy, and stainless steel, etc., and this utility model does not limit this.

[0038] Furthermore, a first locating stop 21 is provided on the first mounting flange 20. The first locating stop 21 is used to position with the first device, i.e., the universal joint at one end, to prevent relative displacement when the first mounting flange 20 is fixed to the universal joint. A second locating stop 31 is provided on the second mounting flange. The second locating stop 31 is used to position with the second device, i.e., the universal joint at the other end, to prevent relative displacement when the second mounting flange 30 is fixed to the universal joint. It can be understood that by providing the first locating stop 21 and the second locating stop 31, precise radial positioning and circumferential limiting can be achieved with the flanges of the universal joints at both ends, thereby completely eliminating the assembly gap between the tooling and the universal joint, preventing circumferential slippage or radial offset during bolt tightening, and ensuring that the phase calibration results do not deviate during the final tightening process.

[0039] Specifically, the first positioning stop 21 is a circular groove, and the second positioning stop 31 is a circular boss. It can be understood that, in this embodiment, by providing the circular groove, automatic alignment and precise engagement between the first positioning stop 21 and the flange of the universal joint can be achieved; by providing the circular boss, automatic alignment and precise engagement between the second positioning stop 31 and the flange of the universal joint can be achieved. The nested concave-convex structure is used to withstand the radial shear force generated during calibration, ensuring positioning reliability.

[0040] Of course, in other embodiments, the first positioning stop 21 can be configured as a boss structure, and the second positioning stop 31 can be configured as a groove structure; or both the first positioning stop 21 and the second positioning stop 31 can be configured as groove structures or boss structures. Specifically, they can be matched and configured according to the shape of the flange end stops of the universal joints at both ends, and this utility model does not limit this.

[0041] Optionally, in other embodiments, the first positioning stop 21 and the second positioning stop 31 can be set to other shapes, such as square or other shapes. Specifically, they can be matched and set according to the shape of the flange end stop of the universal joint. This utility model does not limit this.

[0042] Furthermore, in this embodiment, a first reinforcing member 22 is provided between the positioning shaft 10 and the first mounting flange 20. A second reinforcing member 32 is provided between the positioning shaft 10 and the mounting flange. By providing the first reinforcing member 22 and the second reinforcing member 32, the bending stiffness and fatigue strength of the connection area between the flange root and the shaft can be significantly improved, thereby effectively suppressing the stress concentration phenomenon caused by eccentric load during the calibration process and preventing plastic deformation or cracking of the connection part after long-term use.

[0043] The working principle and process of the drive shaft mounting and positioning fixture 100 provided in this embodiment of the utility model are as follows: Set the actual drive shaft aside.

[0044] Based on the approximate distance between the two universal joints on the vehicle chassis, rotate the first shaft 11 and the second shaft 12 to initially adjust the total length of the drive shaft mounting and positioning fixture 100 so that it is slightly smaller than the installation distance, making it easier to insert.

[0045] Lift the drive shaft mounting and positioning fixture 100 so that the positioning stop of its first mounting flange 20 is aligned with the corresponding structure on the universal joint flange at the power take-off end and inserted. Similarly, align and connect the second mounting flange 30 with the universal joint flange at the other end.

[0046] Slowly rotate the first shaft 11 and the second shaft 12, and precisely finely adjust their length using the threaded mechanism. As the length increases, until the first mounting flange 20 and the second mounting flange 30 are fully fitted onto the universal joint flange, and the connecting bolts can be easily inserted.

[0047] Ensure the tooling is tightly connected to the universal joint flanges at both ends. At this point, the two universal joint forks have been forcibly aligned to a completely in-phase state by the tooling.

[0048] Loosen and remove all bolts connecting the drive shaft mounting fixture 100 to the universal joint flange. Carefully remove the drive shaft mounting fixture 100 from between the two ends. Pick up the actual drive shaft and easily align its flanges with the already positioned universal joint flange. Insert and tighten all bolts. The drive shaft installation is now complete.

[0049] The beneficial effects of the drive shaft mounting and positioning fixture 100 provided in this embodiment of the present invention include: The drive shaft mounting and positioning fixture 100 provided by this utility model includes a positioning shaft body 10. A first mounting flange 20 and a second mounting flange 30 are respectively provided at both ends of the positioning shaft body 10. The first mounting flange 20 is used to connect to a first device, and the second mounting flange 30 is used to connect to a second device. A length adjustment mechanism is provided on the positioning shaft body 10 for adjusting the length of the positioning shaft body 10. The first device and the second device are universal joints at both ends of the drive shaft. Before installing the drive shaft, the universal joints at both ends are calibrated and positioned by connecting the first and second positioning flanges respectively, ensuring the coaxiality of the universal joints at both ends and ensuring that their cross axes are in the same plane. This fixture, as an auxiliary tool, greatly simplifies the subsequent installation process of the actual drive shaft, achieving fast and reliable installation.

[0050] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A drive shaft mounting and positioning fixture, characterized in that, include: The positioning shaft has a first mounting flange and a second mounting flange at its two ends. The first mounting flange is used to connect to a first device, and the second mounting flange is used to connect to a second device. The positioning shaft is provided with a length adjustment mechanism for adjusting the length of the positioning shaft.

2. The drive shaft mounting and positioning fixture according to claim 1, characterized in that, The positioning shaft includes a first shaft portion and a second shaft portion. One end of the first shaft portion is connected to the first mounting flange, and one end of the second shaft portion is connected to the second mounting flange. The other end of the second shaft portion is provided with a cavity. The end of the first shaft portion away from the first mounting flange extends into the cavity and can extend and retract relative to the second shaft portion. A first positioning element is provided at the end of the first shaft portion near the second shaft portion, and a second positioning element is provided at the end of the second shaft portion near the first shaft portion, so as to fix the axial position of the first shaft portion and the second shaft portion.

3. The drive shaft mounting and positioning fixture according to claim 2, characterized in that, The first positioning element is an external threaded section, and the second positioning element is an internal threaded sleeve. The external threaded section and the internal threaded sleeve cooperate with each other. The first shaft and the second shaft are connected by the engagement of the external threaded section and the internal threaded sleeve to adjust the length of the positioning shaft.

4. The drive shaft mounting and positioning fixture according to claim 3, characterized in that, The length of the external thread segment along the axial direction of the first shaft is greater than the length of the internal thread sleeve along the axial direction of the second shaft.

5. The drive shaft mounting and positioning fixture according to claim 2, characterized in that, The cavities of the first shaft portion and the second shaft portion are clearance-fitted.

6. The drive shaft mounting and positioning fixture according to claim 2, characterized in that, The first positioning member has a first positioning hole spaced apart along the axial direction of the first shaft portion, and the second positioning member has a second positioning hole spaced apart along the axial direction of the second shaft portion. The pin passes through the first positioning hole and the second positioning hole in sequence to fix the axial position of the first shaft portion and the second shaft portion.

7. The drive shaft mounting and positioning fixture according to claim 1, characterized in that, The first mounting flange is provided with a first positioning stop, and the second mounting flange is provided with a second positioning stop.

8. The drive shaft mounting and positioning fixture according to claim 7, characterized in that, The first positioning stop is a circular groove, and the second positioning stop is a circular boss.

9. The drive shaft mounting and positioning fixture according to claim 1, characterized in that, The positioning shaft, the first mounting flange, and the second mounting flange are all made of rigid metal material.

10. The drive shaft mounting and positioning fixture according to claim 1, characterized in that, A first reinforcing member is provided between the positioning shaft and the first mounting flange, and a second reinforcing member is provided between the positioning shaft and the mounting flange.

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