Universal gearbox input shaft preassembling device

Abstract

The utility model discloses a universal gearbox input shaft preassembling device, which belongs to the technical field of shaft assembly tools and comprises a base and a turnover frame, two ends of the turnover frame are rotatably mounted on the base, a clamping and positioning mechanism is mounted on the turnover frame and comprises two positioning plates, and the two positioning plates are mounted on the turnover frame. At least one of the positioning plates is slidably mounted on the turnover frame, so that the two positioning plates are close to each other or far away from each other, a positioning hole for holding and positioning the input shaft is defined between the two positioning plates, and the axis of the positioning hole is perpendicular to a rotating shaft of the turnover frame; the base is correspondingly provided with a supporting mechanism capable of being adjusted in a lifting mode, and the supporting mechanism is used for supporting the bottom end of the input shaft. According to the device, the gearbox input shaft can be supported and positioned, the gearbox input shaft can be overturned conveniently, and therefore the preassembling efficiency of the input shaft can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shaft assembly tools, and more specifically to a universal gear box input shaft pre-assembly device. Background Art

[0002] In the field of gearbox input shaft assembly technology, the pre-installation of the gearbox input shaft is an essential part of the assembly process. According to functional requirements, the input shaft is generally pre-installed with a series of parts such as gears, bearings, spacers, seals, glands, etc., and the assembly of the gearbox input shaft generally requires the use of an assembly machine.

[0003] During the assembly process, the input shaft needs to be flipped back and forth according to the assembly process sequence. In the prior art, it is generally flipped manually, but the input shaft is generally made of metal and has a relatively smooth surface. It is easy to slip during the flipping process, resulting in damage to the parts and even injuries to people. At the same time, for large input shaft assembly, since the parts are too heavy, it is difficult to operate directly by manual labor, and it can only be operated by hoisting, which greatly reduces the assembly efficiency.

[0004] After searching, the application case of Chinese patent application No. 201510980573.X discloses a flip mechanism, which includes a vertically arranged support device and a flip frame connected to the support device through a rotating shaft, the axis direction of the rotating shaft is arranged horizontally, and a clamping device is also arranged on the flip frame, so that the clamping device can clamp the workpiece to be processed; the flip frame includes a first bottom bar and a second bottom bar arranged at both ends of the first bottom bar and arranged perpendicular to the first bottom bar, and the clamping device includes two clamping members arranged at one end of the second bottom bar away from the first bottom bar, and a groove is formed inwardly on one surface of the two clamping members close to the axis of the rotating shaft, and a plurality of protrusions are also arranged on the inner wall of the groove. The axis of the workpiece to be welded clamped by the two clamping members in the flip mechanism is parallel to the axis of the rotating shaft, and can only drive the workpiece to be welded to rotate around its own axis. After clamping and positioning, the input shaft cannot be flipped, so it cannot be applied to the pre-installation of the input shaft of the gearbox. Summary of the invention

[0005] In view of the problem that it is inconvenient to flip the input shaft when pre-installing the gearbox input shaft in the prior art and the low assembly efficiency, the utility model provides a universal gearbox input shaft pre-installation device. The pre-installation device of the utility model can support and position the gearbox input shaft and facilitate flipping it, thereby effectively improving the pre-installation efficiency of the input shaft.

[0006] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is:

[0007] The utility model discloses a universal pre-installation device for the input shaft of a gearbox, comprising a base and a flip frame, wherein the two ends of the flip frame are rotatably mounted on the base, and the flip frame and its upper parts are driven to rotate under the action of a driving force. A clamping and positioning mechanism is installed on the flip frame, and the clamping and positioning mechanism comprises two positioning plates, at least one of which can be slidably mounted on the flip frame, so that the two positioning plates are close to each other and define a positioning hole for clamping and positioning the input shaft therebetween, and the axis of the positioning hole is perpendicular to the rotating shaft of the flip frame, that is, the axis of the input shaft clamped by the positioning hole is perpendicular to the rotating shaft of the flip frame. A corresponding support mechanism that can be raised and lowered is installed on the base, and the support mechanism is used to support the bottom end of the input shaft. One end of the input shaft is supported by the support mechanism, and the other end of the input shaft is clamped and clamped and positioned by the clamping and positioning mechanism, so as to facilitate the pre-installation of the input shaft. At the same time, the entire input shaft is driven to rotate together by the flip frame, thereby improving the assembly efficiency.

[0008] Furthermore, a guide sliding groove parallel to the rotating shaft of the flip frame is provided on the flip frame, and at least one of the positioning plates can be slidably installed in the guide sliding groove and locked and positioned by a locking block.

[0009] Furthermore, the positioning plate is a T-shaped structure consisting of a connecting vertical plate and a clamping horizontal plate, wherein the connecting vertical plate is installed on the flip frame, and the clamping horizontal plate is processed with corresponding clamping grooves, and the clamping grooves on the two clamping horizontal plates together form a positioning hole for clamping the input shaft.

[0010] Furthermore, the clamping notch is composed of a first arc segment, a second arc segment, and a straight line segment connected between the first arc segment and the second arc segment, and the radius of the first arc segment is greater than the radius of the second arc segment, so the clamping notch is a variable diameter notch. This structural design facilitates pre-installation of input shafts with a wider size range.

[0011] Furthermore, a long strip-shaped connecting hole is provided on the clamping transverse plate outside the positioning hole, and the connecting hole is parallel to the straight line section of the clamping notch.

[0012] Furthermore, the supporting mechanism includes a first supporting plate and a second supporting plate, wherein the first supporting plate is arranged parallel to the rotating axis of the flip frame and can be slidably installed on the base, and the second supporting plate can be lifted and installed above the first supporting plate, and the second supporting plate is used to support the bottom end of the input shaft.

[0013] Furthermore, the flip frame is a U-shaped plate, and the clamping and positioning mechanism is arranged on the inner side of the flip frame; the base is provided with a pin shaft limiting mechanism for locking and positioning the flip frame, and when the flip frame does not need to rotate, the pin shaft limiting mechanism locks the position of the flip frame in the base.

[0014] Furthermore, the pin shaft limiting mechanism includes a limiting pin, which is installed on the base through a pin shaft bracket. A first pin hole is opened on the base, and a plurality of second pin holes distributed along the circumferential direction are opened on the flip frame. The limiting pin passes through the first pin hole and the corresponding second pin hole. The pin shaft limiting mechanism has a simple structure and is easy to plug and unplug.

[0015] Furthermore, it also includes a power input mechanism, the output end of the power input mechanism is connected to one end of the flip frame, and the power input mechanism is used to drive the flip frame to rotate relative to the base.

[0016] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0017] (1) The utility model provides a pre-installation device for the input shaft of a gearbox, wherein a positioning hole for clamping and positioning the input shaft is defined between two positioning plates of the clamping and positioning mechanism, thereby adapting to clamping and positioning the curved surface of the input shaft; at the same time, since the flip frame is rotatably mounted on the base, and the axis of the positioning hole is perpendicular to the rotating shaft of the flip frame, the input shaft clamped by the positioning hole rotates with the flip frame, thereby realizing the flipping of the input shaft. In addition, the bottom end of the input shaft can be supported by the setting of the support mechanism, which has a good supporting effect in the assembly process where the input shaft needs to be hammered, pressed, etc.

[0018] (2) According to assembly requirements, the power input mechanism of the utility model can drive the flip frame to rotate at any angle, so that the assembly angle of the input shaft can be adjusted to reduce the assembly difficulty. In addition, when the input shaft is in the clamping state, the input shaft can be flipped by rotating the flip frame, thereby reducing the number of clamping times for the input shaft and improving the pre-assembly efficiency.

[0019] (3) The utility model optimizes the shape of the clamping slot so that it consists of a first arc segment, a second arc segment, and a straight line segment connecting the first arc segment and the second arc segment, and the radius of the first arc segment is greater than the radius of the second arc segment, thereby designing the clamping slot as a variable diameter slot to accommodate the clamping of shaft parts with a wider size range. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0021] Figure 1 It is a schematic diagram of the overall structure of the gearbox input shaft pre-installation device according to an embodiment of the utility model.

[0022] Figure 2It is a schematic diagram of the relative positions of two positioning plates in the embodiment of the utility model.

[0023] Figure 3 It is a structural schematic diagram of the locking block in the embodiment of the utility model.

[0024] Figure 4 It is a structural schematic diagram of the support mechanism in the embodiment of the utility model.

[0025] Figure 5 It is an enlarged structural schematic diagram of the pin shaft limiting mechanism in the embodiment of the utility model.

[0026] Figure 6 It is a schematic diagram of the matching structure of the pre-installed device clamping the input shaft in the embodiment of the utility model.

[0027] Description of labels:

[0028] 1. Base; 101. Side plate; 102. Bottom plate; 103. Support sliding groove; 104. First pin hole;

[0029] 2. Flip frame; 201. Guide sliding groove; 202. Second pin hole;

[0030] 3. Positioning plate; 301. Clamping horizontal plate; 302. Connecting hole; 303. Clamping notch; 3031. First arc segment; 3032. Second arc segment; 3033. Straight segment; 304. Connecting vertical plate; 305. Locking block;

[0031] 4. Support mechanism; 401. First support plate; 402. Sliding nut; 403. Second support plate; 404. Adjusting stud; 405. Guide block; 406. Rubber pad;

[0032] 5. Pin limit mechanism; 501. Limit pin; 502. Pin bracket; 503. Stop block; 504. Limit pin hole;

[0033] 6. Power input mechanism;

[0034] 7. Gear assembly department. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0036] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so as to describe the embodiments of the present application described herein.

[0037] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. Moreover, in addition to being used to indicate orientation or positional relationships, some of the above terms may also be used to express other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to the specific circumstances.

[0038] This embodiment provides a universal gearbox input shaft pre-installation device, such as Figure 1 As shown, it includes a base 1 and a flip frame 2, the two ends of the flip frame 2 are rotatably mounted on the base 1, and a clamping and positioning mechanism is installed on the flip frame 2. The clamping and positioning mechanism includes two positioning plates 3, and a positioning hole for clamping and positioning the input shaft is defined between the two positioning plates 3, and at least one of the positioning plates 3 can be slidably installed on the flip frame 2, so that the two positioning plates 3 are close to or away from each other and define a positioning hole for clamping and positioning the input shaft between them, and the axis of the above positioning hole is perpendicular to the rotation axis of the flip frame 2, that is, the axis of the input shaft clamped by the positioning hole is perpendicular to the rotation of the flip frame 2. The base 1 is correspondingly installed with a lifting and lowering adjustable support mechanism 4, which is used to support the bottom end of the input shaft.

[0039] like Figure 1 As shown, a positioning hole for clamping and positioning the input shaft is defined between the two positioning plates 3 in the clamping and positioning mechanism, so that the input shaft curved surface can be clamped for positioning, which is suitable for positioning shaft parts. At the same time, since at least one of the positioning plates 3 can be slidably mounted on the flip frame 2, the spacing between the two positioning plates 3 can be adjusted to achieve clamping and positioning of input shafts of different sizes. In addition, since the flip frame 2 is rotatably mounted on the base 1, and the axis of the positioning hole is perpendicular to the rotating shaft of the flip frame 2, the input shaft clamped by the positioning hole can rotate with the flip frame 2 to achieve flipping of the input shaft, which greatly improves the assembly efficiency of the input shaft and solves the technical problem of inconvenience of manual flipping.

[0040] Specifically, in this embodiment, a guide sliding groove 201 parallel to the rotating shaft of the flip frame 2 is provided on the flip frame 2, and at least one positioning plate 3 is installed in the guide sliding groove 201 and locked and positioned by a locking block 305. As a further preferred solution, both positioning plates 3 are slidably installed on the flip frame 2, and the axis of the input shaft can be adjusted to be located in the same vertical plane, thereby facilitating the determination of the support position of the bottom end of the input shaft. Furthermore, two parallel guide sliding grooves 201 are processed on the flip frame 2, which is conducive to further improving the stability of the sliding of the positioning plate 3.

[0041] Specifically, Figure 1 , Figure 2 As shown, the positioning plate 3 in this embodiment includes a connecting vertical plate 304 and a clamping horizontal plate 301, wherein the clamping horizontal plate 301 and the connecting vertical plate 304 are arranged in a T shape and are reinforced and connected by reinforcing ribs; wherein the connecting vertical plate 304 is mounted on the flip frame 2. The two clamping horizontal plates 305 are respectively provided with clamping notches 303, and the two clamping notches 303 form positioning holes for clamping the input shaft.

[0042] More specifically, the connecting plate 304 may be provided with a threaded hole or a through hole for connection, and a through hole is more preferred. As a preferred embodiment for locking the connecting plate 304, Figure 3 As shown, the locking block 305 is composed of a limit stop end, a threaded end, and a guide boss connected between the limit stop end and the threaded end. The limit stop end, the guide boss and the threaded end are coaxially arranged. The locking block 305 passes through the guide sliding groove 201 and the through hole in the connecting vertical plate 304. The locking nut, the anti-skid washer and the threaded end of the locking block 305 are used in conjunction with the connecting vertical plate 304 to lock the turning frame 2. Furthermore, the cross section of the guide boss in the locking block 305 is larger than the cross section of the threaded end, and the guide boss in the locking block 305 is slightly smaller than the guide sliding groove 201, thereby increasing the contact area between the two, so as to be able to withstand a larger load.

[0043] like Figure 2As shown, as a preferred embodiment of the clamping notch 303, the clamping notch 303 is composed of a first arc segment 3031, a second arc segment 3032, and a straight line segment 3033 connected between the first arc segment 3031 and the second arc segment 3032. The first arc segment 3031 and the second arc segment 3032 have different arc radii, the radius of the first arc segment 3031 is greater than the radius of the second arc segment 3032, and the two ends of the straight line segment 3033 are preferably tangent to the first arc segment 3031 and the second arc segment 3032, respectively. Therefore, the clamping notch 303 is a variable diameter notch, so as to adapt to the clamping of shaft parts with a wider size range. The two positioning plates 3 are adjusted to be close to each other, and the clamping notch 303 contacts the input shaft curved surface, and the input shaft is positioned by clamping.

[0044] Furthermore, the input shaft of the gearbox is a stepped shaft. For the input shaft that needs to be equipped with a large moment of inertia gear, the gear mounting portion 7 is a gear positioning shoulder with a threaded hole in the input shaft. Figure 2 , Figure 6 As shown, a long strip-shaped connecting hole 302 is opened in the clamping horizontal plate 305, and the connecting hole 302 is parallel to the straight section 3033 of the clamping notch 303, so that the installation position of the screw in the connecting hole 302 can be continuously adjusted. The screw passes through the connecting hole 302 and the gear mounting portion 7, and the screw and the gear mounting portion 7 are threadedly matched to lock the input shaft on the clamping horizontal plate 305.

[0045] This embodiment provides a support mechanism 4 for supporting the bottom end of the input shaft, which has a good supporting effect in the assembly process of the input shaft that requires hammering, pressing, etc. Since the support mechanism 4 can be raised and lowered, it is convenient to make room for the input shaft to flip.

[0046] As one of the implementation methods of the support mechanism 4, the support mechanism 4 includes a first support plate 401 and a second support plate 403, wherein the first support plate 401 is arranged parallel to the rotating axis of the flip frame 2 and can be slidably installed in the base 1, and the second support plate 403 can be lifted and installed above the first support plate 401, and the second support plate 403 supports the bottom end of the input shaft.

[0047] Specifically, the adjusting stud 404 is threadedly connected to the first support plate 401 and the second support plate 403 respectively, and the sliding nut 402 is used in conjunction with the adjusting stud 404. The sliding nut 402 is rotated to push the second support plate 403 to move vertically, thereby freeing up the space required for the input shaft to rotate. Furthermore, the second support plate 403 contacts the lower end surface of the input shaft to increase the support area. The positioning hole clamps the input shaft curved surface and the support mechanism 4 supports the lower end surface of the input shaft, which is conducive to improving the coaxiality of the assembly and improving the assembly accuracy.

[0048] More specifically, the guide block 405 is fixed to the lower end surface of the first support plate 401, and a support sliding groove 103 is provided in the base 1. The guide block 405 is slidably arranged in the support sliding groove 103. The guide block 405 slides along the support sliding groove 103, so that the support mechanism 4 has a larger support range. Preferably, the lower end surface of the second support plate 403 is set as a concave groove to reduce friction when it slides. In addition, a rubber pad 406 is also provided on the upper end surface of the second support plate 403 to prevent the input shaft from being damaged by collision.

[0049] As a preferred embodiment of the base 1, Figure 1 As shown, the base 1 includes a bottom plate 102 and two side plates 101, and the two side plates 101 are respectively installed vertically at the two ends of the bottom plate 102, so as to provide more installation space for the flip frame 2 and its upper components. The flip frame 2 is correspondingly provided with a U-shaped plate structure, and is rotatably installed between the two side plates 101 of the base 1. This structural design is conducive to improving the structural stability of the entire device, especially preventing the input shaft from tipping over during rotation.

[0050] Further, such as Figure 5 As shown, the base 1 is also provided with a pin limit mechanism 5 for locking and positioning the flip frame 2 . When the flip frame 2 does not need to rotate, the pin limit mechanism 5 locks the position of the flip frame 2 in the base 1 .

[0051] As a preferred embodiment of the pin limit mechanism 5, the pin limit mechanism 5 includes a limit pin 501, which is installed on the side plate 101 through a pin support 502. The side plate 101 is provided with a first pin hole 104. The angle at which the flip frame 2 drives the input shaft to flip can be arbitrary. The corresponding flip frame 2 is provided with a plurality of second pin holes 202 distributed along the circumferential direction. The flip frame 2 is rotated so that the second pin holes 202 at corresponding positions thereof coincide with the first pin holes 104. The limit pin 501 passes through the first pin hole 104 and the corresponding second pin hole 202, thereby limiting the flip frame 2 from rotating incorrectly relative to the base 1. The optimized design of the pin limit mechanism 5 is adopted, which has a simple structure and is easy to plug and unplug.

[0052] In the actual assembly process, the input shaft is generally flipped 180° relative to the previous position, and two second pin holes 202 are correspondingly opened on the flip frame 2. The two second pin holes 202 overlap with the first pin holes 104 at two positions 180° apart when the input shaft is flipped.

[0053] Specifically, Figure 5As shown, the pin support 502 is installed on the side of the side plate 101 away from the flip frame 2, and the pin support 502 is provided with a limit pin hole 504, and a stopper 503 is provided on the limit pin 501. During assembly, the limit pin 501 is rotated to a specific angle, that is, the stopper 503 and the limit pin hole 504 are parallel to each other, and the limit pin 501 can pass through the limit pin hole 504. The limit pin 501 is L-shaped, and the L-shaped end of the limit pin 501 is not parallel to the straight line where the stopper 503 is located. Under the action of gravity, the L-shaped end of the limit pin 501 will rotate automatically to vertically downward. At this time, the straight line where the stopper 503 is located is not parallel to the limit pin hole 504, and the limit pin 501 cannot be directly pulled out. Therefore, when the limit pin 501 is pulled out and inserted, the stopper 503 plays a role in limiting the direction to prevent the limit pin 5 from being accidentally pulled out. At the same time, the limiting pin hole 504 in the pin support 502 can store the limiting pin 501, and the plugging and unplugging process can improve work efficiency.

[0054] like Figure 1 As shown, as a preferred mode of this embodiment, the device also includes a power input mechanism 6, which is a motor with a brake function, and the output shaft of the motor is connected to one end of the flip frame 2 to drive the flip frame 2 and its upper parts to rotate relative to the base 1, thereby facilitating the rotation of the flip frame 2. The power input mechanism 6 can also be a handwheel adjustment mechanism with a locking mechanism, or other mechanisms with a rotating function. During the pre-installation process, the input shaft of the gearbox is driven by the power input mechanism 6 to rotate around the rotating shaft of the flip frame 2, thereby realizing the flipping of the input shaft.

[0055] According to assembly requirements, the power input mechanism 6 can drive the flip frame 2 to rotate at any angle, so that the assembly angle of the input shaft can be adjusted to reduce the assembly difficulty. At the same time, when the input shaft is in a clamped state, the input shaft can be flipped by rotating the flip frame 2, thereby reducing the number of clamping times for the input shaft and improving the pre-assembly efficiency.

[0056] Specifically, the device of this embodiment is used as follows: rotate the flip frame 2 to adjust the input shaft to the appropriate angle required for assembly, generally the input shaft axis is set vertically, slide the support mechanism 4 to the bottom of the input shaft, and adjust the second support plate 403 to the corresponding height through the sliding nut 402 to support the bottom end of the input shaft. Adjust the installation position of the positioning plate 3 according to the size of the input shaft diameter: at the beginning, the locking block 305 is not completely locked, the locking block 305 slides in the guide sliding groove 201 to ensure that the input shaft can be placed in the clamping notches 303 of the two positioning plates 3, put the input shaft between the two positioning plates 3, adjust the clamping notches 303 in the positioning plates 3 to clamp the input shaft curved surface, and the locking block 305 fixes the positioning plate 3 on the flip frame 2. After the input shaft is clamped and fixed, it can be assembled with gears, spacers and other parts.

[0057] In this application, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0058] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A universal gearbox input shaft pre-installation device, characterized in that: The invention comprises a base (1) and a flip frame (2), wherein the two ends of the flip frame (2) are rotatably mounted on the base (1), and a clamping and positioning mechanism is mounted on the flip frame (2), wherein the clamping and positioning mechanism comprises two positioning plates (3), and at least one of the positioning plates (3) can be slidably mounted on the flip frame (2), so that the two positioning plates (3) are close to each other and define a positioning hole for clamping and positioning the input shaft therebetween, and the axis of the positioning hole is perpendicular to the rotating shaft of the flip frame (2); and a support mechanism (4) that can be raised and lowered and adjusted is correspondingly mounted on the base (1), and the support mechanism (4) is used to support the bottom end of the input shaft.

2. The universal gearbox input shaft pre-assembly device according to claim 1, characterized in that: The flip frame (2) is provided with a guide sliding groove (201) parallel to the rotation axis of the flip frame (2), and at least one positioning plate (3) can be slidably installed in the guide sliding groove (201) and locked and positioned by a locking block (305).

3. The universal gearbox input shaft pre-installation device according to claim 2, characterized in that: The positioning plate (3) is a T-shaped structure consisting of a connecting vertical plate (304) and a clamping horizontal plate (301), wherein the connecting vertical plate (304) is mounted on the flip frame (2), and a clamping notch (303) is correspondingly processed on the clamping horizontal plate (301), and the clamping notches (303) on the two clamping horizontal plates (301) together form a positioning hole for clamping the input shaft.

4. The universal gearbox input shaft pre-assembly device according to claim 3, characterized in that: The clamping notch (303) is composed of a first circular arc segment (3031), a second circular arc segment (3032), and a straight line segment (3033) connected between the first circular arc segment (3031) and the second circular arc segment (3032), and the radius of the first circular arc segment (3031) is greater than the radius of the second circular arc segment (3032).

5. The universal gearbox input shaft pre-assembly device according to claim 3 or 4, characterized in that: A long strip-shaped connecting hole (302) is provided on the clamping transverse plate (301) outside the positioning hole, and the connecting hole (302) is parallel to the straight line section (3033) of the clamping notch (303).

6. The universal gearbox input shaft pre-installation device according to any one of claims 1 to 4, characterized in that: The support mechanism (4) comprises a first support plate (401) and a second support plate (403), wherein the first support plate (401) is arranged parallel to the rotation axis of the flip frame (2) and can be slidably installed on the base (1), and the second support plate (403) can be lifted and installed above the first support plate (401), and the second support plate (403) is used to support the bottom end of the input shaft.

7. The universal gearbox input shaft pre-installation device according to any one of claims 1 to 4, characterized in that: The flip frame (2) is a U-shaped plate, and the clamping and positioning mechanism is arranged on the inner side of the flip frame (2); the base (1) is provided with a pin limit mechanism (5) for locking and positioning the flip frame (2).

8. The universal gearbox input shaft pre-assembly device according to claim 7, characterized in that: The pin shaft limiting mechanism (5) comprises a limiting pin (501), the limiting pin (501) being installed on the base (1) through a pin shaft bracket (502), the base (1) being provided with a first pin hole (104), the flip frame (2) being provided with a plurality of second pin holes (202) distributed along a circumferential direction, the limiting pin (501) passing through the first pin hole (104) and the corresponding second pin hole (202).

9. The universal gearbox input shaft pre-assembly device according to any one of claims 1 to 4, characterized in that: It also comprises a power input mechanism (6), the output end of the power input mechanism (6) is connected to one end of the flip frame (2), and the power input mechanism (6) is used to drive the flip frame (2) to rotate relative to the base (1).

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