Press fitting device for positioning bearings at two ends of gap bridge driving shaft

Abstract

The utility model relates to a press-fitting device for positioning bearings at two ends of a gap bridge driving shaft, the press-fitting device sequentially comprises a driving press-fitting structure, a positioning structure and a sliding support structure along the length direction, and the positioning structure is provided with a positioning cambered surface and is used for abutting against and attaching to the outer wall of the driving shaft; the driving press-fitting structure and the sliding supporting structure are coaxially arranged and used for stretching into mounting holes in the two ends of a driving shaft and pressing a bearing, the driving press-fitting structure is connected with a driving part, the sliding supporting structure can move in the axial direction, and the driving part drives the driving press-fitting structure to move in the axial direction. By the adoption of the scheme, the outer wall of the driving shaft is positioned through the positioning structure in the middle of the press-fitting device, and then through movement of the driving press-fitting structure and the sliding supporting structure which are located at the two ends of the driving shaft, the driving part can drive the driving press-fitting structure to abut against the sliding supporting structure; and then the bearings at the two ends of the driving shaft can be pressed tightly by continuously applying pressure, so that press fitting of the bearings at the two ends of the driving shaft is completed.

Description

Technical Field

[0001] The utility model relates to the field of bearing press-fitting, in particular to a press-fitting device for positioning bearings at both ends of a bridge driving shaft. Background Art

[0002] When assembling the deep groove ball bearing of the bridge driving shaft of the crawler grain combine harvester, the inner and outer rings of the bearing need to be assembled with the driving shaft and the bridge shaft cylinder at the same time. The transition resistance is large, the hammering operation is difficult, and the labor intensity of the employees is high. In addition, the hammering operation has the hidden danger of the inner seal ring of the bearing falling off, which is not easy to find, affecting the cleanliness and service life of the bearing.

[0003] The deep groove ball bearings on both sides are assembled by hammering. After the bearing on one side is assembled, the active shaft cantilever tilts, causing the installed end bearing to be subjected to the gravity of the active shaft cantilever, causing a certain degree of damage to the bearing and affecting the service life of the bearing. Utility Model Content

[0004] Aiming at the problem in the prior art that bearings are assembled by knocking, resulting in damage to the bearings after assembly, thereby causing the bearings to be shortened, the utility model provides a press-fitting device for effectively protecting the bearings and for positioning the bearings at both ends of a bridge driving shaft.

[0005] The technical solution of the utility model for solving the above-mentioned technical problems is as follows: a press-fitting device for positioning bearings at both ends of a bridge driving shaft, the press-fitting device sequentially comprising an active press-fitting structure, a positioning structure and a sliding support structure along the length direction, the positioning structure is provided with a positioning arc surface and is used to press against and fit the outer wall of the driving shaft, the active press-fitting structure and the sliding support structure are coaxially arranged and are respectively used to extend into the mounting holes at both ends of the driving shaft and press the bearings, the active press-fitting structure is connected to a driving member, the sliding support structure can move axially, and the driving member drives the active press-fitting structure to move axially.

[0006] The beneficial effect of the utility model is that the press-fitting device positions the outer wall of the driving shaft through the positioning structure in the middle, that is, the positioning arc surface is fitted with the outer wall of the driving shaft, and then through the movement of the active press-fitting structure and the sliding support structure located at both ends of the driving shaft, the active press-fitting structure can be driven by the driving member to press the driving shaft against the sliding support structure, and then the bearings at both ends of the driving shaft can be pressed by continuing to apply pressure to complete the press-fitting of the bearings at both ends of the driving shaft.

[0007] Furthermore, the positioning structure is in the shape of a thin plate and is provided with at least two, and the positioning arc surface is in the shape of a semicircular arc.

[0008] The beneficial effect of adopting the above further scheme is that the positioning structure is in the shape of a thin plate, which has the effect of reducing weight while ensuring the positioning effect of the driving shaft; two positioning structures are set and can be set separately, that is, positioning arc surfaces are provided at different axial positions of the driving shaft, which plays a role in improving the positioning effect; the positioning arc surface is a semicircular arc, which is convenient for the driving shaft to move in and fit with the positioning arc surface, and also convenient for the driving shaft to be removed.

[0009] Furthermore, the pressing device also includes a suspension frame, and the two ends of the suspension frame are respectively connected to a main control cabinet and a mounting seat, the suspension frame is connected to the positioning structure, the main control cabinet is connected to the active pressing structure, and the mounting seat is connected to the sliding support structure.

[0010] The beneficial effect of adopting the above further scheme is that a hanging frame is provided to facilitate the movement of the entire pressing device to improve the use scenario of the pressing device; the positioning structure is connected to the bottom of the hanging frame, and when the pressing device is used, the pressing device can be moved downward from the top and the active shaft can be fitted with the positioning structure.

[0011] Furthermore, a slide rail is provided at the bottom of the suspension frame, and a plurality of sliders are movably connected to the slide rail, and a positioning structure is fixed to each slider.

[0012] The beneficial effect of adopting the above further scheme is that the slide rail and the slider are set so that the positioning structure and the driving shaft will not slide relative to each other after being tightly attached, thereby improving the accuracy of positioning the driving shaft; when the active press-fitting structure pushes the driving shaft to move axially, the positioning structure and the driving shaft remain in a tightly attached state and move axially together.

[0013] Furthermore, the sliding support structure includes a fixed sleeve and a movable shaft, wherein the fixed sleeve is sleeved outside the movable shaft and fixed on a mounting seat, and the movable shaft can move axially along the fixed sleeve and is used to abut against the end of the driving shaft.

[0014] The beneficial effect of adopting the above further scheme is that since the movable shaft can move axially, after the driving shaft is abutted and positioned with the positioning structure, the movable shaft is pushed toward the driving shaft, so that the movable shaft abuts against one end of the driving shaft and pushes the driving shaft toward the active pressing structure, so that the outer wall and both ends of the driving shaft are positioned before the driving member is started to improve the accuracy of the bearing press fitting.

[0015] Furthermore, one end of the movable shaft facing the positioning structure is a first clamping portion, and a first boss radially extends from the outer periphery of the first clamping portion. The diameter of the first boss is larger than the inner diameter of the center hole of the fixed sleeve and the outer diameter of the driving shaft.

[0016] The beneficial effect of adopting the above further scheme is that the diameter of the first boss is larger than the outer diameter of the driving shaft, thereby preventing the first clamping portion of the movable shaft from extending too deep into the inner hole of the driving shaft, thereby avoiding excessive axial compression of the bearing at this end; the diameter of the first boss is larger than the inner diameter of the center hole of the fixed sleeve, thereby preventing the movable shaft from escaping from the fixed sleeve when subjected to the axial pressure of the active press-fit structure.

[0017] Furthermore, the outer periphery of the other end of the movable shaft away from the positioning structure is knurled and serves as a handle.

[0018] The beneficial effect of adopting the above further solution is that a handle is provided to facilitate the position adjustment of the movable shaft and avoid slipping.

[0019] Furthermore, both the main control cabinet and the mounting seat are provided with start buttons, and the two start buttons are electrically connected to the driving member to control the driving member to push the active press-fitting structure to move.

[0020] The beneficial effect of adopting the above further solution is that multiple start buttons are provided to improve safety or facilitate operation.

[0021] Furthermore, a plurality of hoisting holes are provided on the top of the suspension frame along the length direction.

[0022] The beneficial effect of adopting the above further solution is that a plurality of hoisting holes are provided to facilitate the hoisting movement of the entire suspension frame and the adjustment of the hoisting position.

[0023] Furthermore, one end of the active press-fit structure facing the positioning structure is a second pressing portion, and a second boss radially extends out from the outer periphery of the second pressing portion, and the diameter of the second boss is larger than the outer diameter of the active shaft.

[0024] The beneficial effect of adopting the above further scheme is that a second clamping part is provided, which extends into the inner hole of the driving shaft to clamp the bearing, and the second boss has an axial limiting effect, thereby preventing the second clamping part from extending into the driving shaft too much, preventing the bearing from being over-compressed, and protecting the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the press-fit device for positioning the bearings at both ends of the driving shaft of the bridge according to the utility model Figure 1 ;

[0026] Figure 2 Schematic diagram of the press-fit device for positioning the bearings at both ends of the driving shaft of the bridge according to the utility model Figure 2 ;

[0027] Figure 3 for Figure 2 Sectional view at AA in the middle;

[0028] Figure 4 for Figure 2 A magnified view of the detail at B in the middle;

[0029] Figure 5 for Figure 2 A magnified view of the details at C in the middle;

[0030] Figure 6 It is a cross-sectional view of the use state of the press-fitting device of the utility model.

[0031] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0032] 10 active press-fitting structure; 11 second pressing portion; 12 second boss;

[0033] 20 positioning structure; 21 positioning arc surface;

[0034] 30 sliding support structure; 31 fixed shaft sleeve; 32 moving shaft; 32-1 first pressing portion; 32-2 first boss; 32-3 handle; 32-4 third boss;

[0035] 40 driving member;

[0036] 50 suspension frame; 51 slide rail; 52 slider; 53 lifting hole;

[0037] 61 main control cabinet; 62 mounting base; 63 start button; 64 stop button;

[0038] 71 driving shaft; 72 bearing; 73 lifting ring; 74 suspension bridge. DETAILED DESCRIPTION

[0039] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0040] Example 1

[0041] like Figure 1 and Figure 2 A press-fitting device for positioning bearings at both ends of a bridge driving shaft, the press-fitting device comprises an active press-fitting structure 10, a positioning structure 20 and a sliding support structure 30 in sequence along the length direction, the positioning structure 20 is provided with a positioning arc surface 21 and is used to press against and fit the outer wall of the driving shaft 71, the active press-fitting structure 10 and the sliding support structure 30 are coaxially arranged and are respectively used to extend into the mounting holes at both ends of the driving shaft 71 and press the bearings 72, the active press-fitting structure 10 is connected to a driving member 40, the sliding support structure 30 can move axially, and the driving member 40 drives the active press-fitting structure 10 to move axially.

[0042] The beneficial effect of this embodiment is that the press-fitting device positions the outer wall of the active shaft 71 through the positioning structure 20 in the middle, that is, the positioning arc surface 21 is fitted with the outer wall of the active shaft 71, and then through the movement of the active press-fitting structure 10 and the sliding support structure 30 located at both ends of the active shaft 71, the active press-fitting structure 10 can be driven by the driving member 40 to press the active shaft 71 against the sliding support structure 30, and then by continuing to apply pressure, the bearings 72 at both ends of the active shaft 71 can be pressed to complete the press-fitting of the bearings 72 at both ends of the active shaft 71.

[0043] On the basis of the above embodiment, when the driving shaft 71 is pushed and moves axially, the positioning structure 20 can move axially together with the driving shaft 71, or the positioning structure 20 can remain stationary and slide relative to the driving shaft 71. The driving member 40 can be a motor screw structure, or a hydraulic cylinder, a pneumatic cylinder, or the like.

[0044] Example 2

[0045] Preferably, on the basis of Embodiment 1, the positioning structure 20 is in the shape of a thin plate and is provided with at least two, and the positioning arc surface 21 is in the shape of a semicircular arc.

[0046] The beneficial effect of adopting the preferred scheme in the above embodiment is that the positioning structure 20 is in the shape of a thin plate, which has the effect of reducing weight while ensuring the positioning effect of the active shaft 71; two positioning structures 20 are provided and can be provided separately, that is, positioning arc surfaces 21 are provided at different axial positions of the active shaft 71, which has the effect of improving the positioning effect; the positioning arc surface 21 is semicircular, which facilitates the moving in of the active shaft 71 and the fitting of the positioning arc surface 21, and also facilitates the removal of the active shaft 71.

[0047] Example 3

[0048] like Figure 1 and Figure 3 Preferably, on the basis of Embodiment 1-2, the pressing device also includes a suspension frame 50, and the two ends of the suspension frame 50 are respectively connected to a main control cabinet 61 and a mounting seat 62, the suspension frame 50 is connected to the positioning structure 20, the main control cabinet 61 is connected to the active pressing structure 10, and the mounting seat 62 is connected to the sliding support structure 30.

[0049] The beneficial effect of adopting the preferred scheme in the above embodiment is that a hanging frame 50 is provided to facilitate the movement of the entire pressing device to improve the use scenario of the pressing device; the positioning structure 20 is connected to the bottom of the hanging frame 50, and when the pressing device is used, the pressing device can be moved downward from the top, and the active shaft 71 is made to fit with the positioning structure 20.

[0050] On the basis of the above embodiment, the positioning structure 20 can be connected to the bottom, side or other places of the suspension frame 50. The suspension frame 50 is arranged in the middle of the press-fitting device.

[0051] Example 4

[0052] Preferably, on the basis of Embodiment 3, a slide rail 51 is provided at the bottom of the suspension frame 50 , and a plurality of sliders 52 are movably connected to the slide rail 51 , and a positioning structure 20 is fixed to each slider 52 .

[0053] The beneficial effect of adopting the preferred scheme in the above embodiment is that the slide rail 51 and the slider 52 are provided so that the positioning structure 20 and the active shaft 71 will not slide relative to each other after being tightly attached, thereby improving the accuracy of positioning the active shaft 71; when the active press-fitting structure 10 pushes the active shaft 71 to move axially, the positioning structure 20 and the active shaft 71 remain in a tightly attached state and move axially together.

[0054] On the basis of the above embodiment, two sliders 52 are connected to the linear slide rail 51 , and a positioning structure 20 is fixed to each slider 52 .

[0055] Example 5

[0056] Preferably, on the basis of Embodiment 3-4, the sliding support structure 30 includes a fixed sleeve 31 and a movable shaft 32, the fixed sleeve 31 is sleeved outside the movable shaft 32, the fixed sleeve 31 is fixed on the mounting seat 62, and the movable shaft 32 can move along the axial direction of the fixed sleeve 31 and is used to abut against the end of the driving shaft 71.

[0057] The beneficial effect of adopting the preferred scheme in the above embodiment is that since the movable shaft 32 can move axially, after the active shaft 71 is abutted and positioned with the positioning structure 20, the movable shaft 32 is pushed toward the active shaft 71, so that the movable shaft 32 abuts against one end of the active shaft 71 and pushes the active shaft 71 to move toward the active press-fitting structure 10, so that the outer wall and both ends of the active shaft 71 are positioned before the driving member 40 is started to improve the accuracy of the press-fitting of the bearing 72.

[0058] Example 6

[0059] like Figure 4 Preferably, on the basis of Example 5, one end of the movable shaft 32 facing the positioning structure 20 is a first clamping portion 32-1, and a first boss 32-2 extends radially from the outer periphery of the first clamping portion 32-1, and the diameter of the first boss 32-2 is larger than the inner diameter of the center hole of the fixed sleeve 31 and the outer diameter of the driving shaft 71.

[0060] The beneficial effect of adopting the preferred scheme in the above embodiment is that the diameter of the first boss 32-2 is larger than the outer diameter of the active shaft 71, thereby preventing the first clamping portion 32-1 of the movable shaft 32 from extending too deep into the inner hole of the active shaft 71, so as to avoid excessive axial compression of the bearing 72 at this end; the diameter of the first boss 32-2 is larger than the inner diameter of the center hole of the fixed sleeve 31, thereby preventing the movable shaft 32 from escaping from the fixed sleeve 31 when subjected to the axial pressure of the active press-fitting structure 10.

[0061] On the basis of the above embodiment, a first avoidance hole is opened in the middle of the first clamping part 32-1, and an installation shaft is installed in the middle of the active shaft 71. The installation shaft passes through the first avoidance hole to improve the effect of axis positioning; a third boss 32-4 is also provided on the movable shaft 32, and the third boss 32-4 is arranged to face away from the first boss 32-2 to prevent the other end of the movable shaft 32 from escaping from the fixed sleeve 31.

[0062] Example 7

[0063] Preferably, on the basis of Embodiment 5-6, the outer periphery of the other end of the movable shaft 32 away from the positioning structure 20 is knurled and serves as a handle 32-3.

[0064] The beneficial effect of adopting the preferred solution in the above embodiment is that the handle 32 - 3 is provided to facilitate the position adjustment of the movable shaft 32 and avoid slipping.

[0065] Example 8

[0066] Preferably, on the basis of embodiments 3-7, start buttons 63 are provided on the main control cabinet 61 and the mounting seat 62, and the two start buttons 63 are electrically connected to the driving member 40 for controlling the driving member 40 to push the active press-fitting structure 10 to move.

[0067] The beneficial effect of adopting the preferred solution in the above embodiment is that multiple start buttons 63 are provided to improve safety or facilitate operation.

[0068] On the basis of the above embodiment, two start buttons 63 are provided, which are divided into two situations: when the two start buttons 63 need to be pressed at the same time to start the system, this setting improves safety; when only pressing any one of the start buttons 63 can start the system, this setting improves the convenience of operation. The main control cabinet 61 is also provided with a stop button 64, which is arranged side by side with the start button 63.

[0069] Example 9

[0070] Preferably, based on embodiments 3-8, a plurality of hanging holes 53 are provided on the top of the hanging frame 50 along the length direction.

[0071] The beneficial effect of adopting the preferred solution in the above embodiment is that a plurality of hoisting holes 53 are provided to facilitate the hoisting movement of the entire suspension frame 50 and the adjustment of the hoisting position.

[0072] On the basis of the above embodiment, the hoisting holes 53 are used to connect the hoisting rings 73 , and any two hoisting holes 53 are connected with a hoisting ring 73 , and the positions of the two hoisting rings 73 are not adjacent.

[0073] Example 10

[0074] like Figure 5 Preferably, on the basis of embodiments 1-9, one end of the active press-fitting structure 10 facing the positioning structure 20 is a second clamping portion 11, and a second boss 12 radially extends from the outer periphery of the second clamping portion 11, and the diameter of the second boss 12 is larger than the outer diameter of the active shaft 71.

[0075] The beneficial effect of adopting the preferred scheme in the above embodiment is that a second clamping portion 11 is provided, and the second clamping portion 11 extends into the inner hole of the driving shaft 71 to clamp the bearing 72, and the second boss 12 has an axial limiting effect, thereby preventing the second clamping portion 11 from extending into the driving shaft 71 too much, preventing the bearing 72 from being over-compressed, and protecting the bearing 72.

[0076] On the basis of the above embodiment, a second air-avoiding hole is opened in the middle of the second pressing portion 11. Since a mounting shaft is installed in the middle of the driving shaft 71, the mounting shaft can pass through the second air-avoiding hole for easy positioning.

[0077] The bearing 72 is pressed in the following manner: the driving shaft 71 is fixed on the suspension bridge 74 (such as Figure 6 ), the press-fitting device is lifted by the lifting ring 73 at the top and moved to be placed above the driving shaft 71, and the press-fitting device is continued to be moved, so that the positioning arc surface 21 of the positioning structure 20 abuts against the outer wall of the driving shaft 71; the movable shaft 32 is pushed toward the driving shaft 71, and the movable shaft 32 abuts against one end of the driving shaft 71, and the first clamping portion 32-1 is inserted into the inner hole of the driving shaft 71, and then the movable shaft 32 is continued to be pushed until the other end of the driving shaft 71 is pushed to abut against the active press-fitting structure 10, and the second clamping portion 11 Insert it into the inner hole of the active shaft 71; then press the two start buttons 63 at the same time to start the driving member 40, so that the active pressure head of the active pressing structure 10 pushes the active shaft 71 to move toward the sliding support structure 30 until the movable shaft 32 is tightly attached to the fixed sleeve 31, and then the driving member 40 continues to apply thrust to press the bearings 72 at both ends of the active shaft 71; after completing the pressing, press the stop button 64, the active pressure head retreats into the active pressing structure 10, exits the remaining structures, and then removes the entire pressing device by hoisting.

[0078] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0079] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0080] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0081] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0082] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0083] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A press-fit device for positioning bearings at both ends of a bridge driving shaft, characterized in that: The press-fitting device comprises an active press-fitting structure (10), a positioning structure (20) and a sliding support structure (30) in sequence along the length direction; the positioning structure (20) is provided with a positioning arc surface (21) and is used to press against and fit the outer wall of the active shaft (71); the active press-fitting structure (10) and the sliding support structure (30) are coaxially arranged and are respectively used to extend into the mounting holes at both ends of the active shaft (71) and press the bearing (72); the active press-fitting structure (10) is connected to a driving member (40) ， The driving member (40) drives the active press-fitting structure (10) to move in the axial direction.

2. The press-fitting device for positioning the bearings at both ends of the bridge driving shaft according to claim 1 is characterized in that: The positioning structure (20) is in the shape of a thin plate and is provided with at least two, and the positioning arc surface (21) is in the shape of a semicircular arc.

3. The press-fitting device for positioning the bearings at both ends of the bridge driving shaft according to claim 1 is characterized in that: The press-fitting device also includes a suspension frame (50), and the two ends of the suspension frame (50) are respectively connected to a main control cabinet (61) and a mounting seat (62), the suspension frame (50) is connected to the positioning structure (20), the main control cabinet (61) is connected to the active press-fitting structure (10), and the mounting seat (62) is connected to the sliding support structure (30).

4. The press-fitting device for positioning the bearings at both ends of the bridge driving shaft according to claim 3 is characterized in that: A slide rail (51) is provided at the bottom of the suspension frame (50), a plurality of sliders (52) are movably connected to the slide rail (51), and the positioning structure (20) is fixed to each slider (52).

5. The press-fitting device for positioning the bearings at both ends of the bridge driving shaft according to claim 3 is characterized in that: The sliding support structure (30) comprises a fixed shaft sleeve (31) and a movable shaft (32), wherein the fixed shaft sleeve (31) is sleeved outside the movable shaft (32), the fixed shaft sleeve (31) is fixed on the mounting seat (62), and the movable shaft (32) can move along the axial direction of the fixed shaft sleeve (31) and is used to abut against the end of the driving shaft (71).

6. The press-fitting device for positioning the bearings at both ends of the bridge driving shaft according to claim 5 is characterized in that: One end of the movable shaft (32) facing the positioning structure (20) is a first clamping portion (32-1), and a first boss (32-2) is radially extended from the outer periphery of the first clamping portion (32-1), and the diameter of the first boss (32-2) is larger than the inner diameter of the center hole of the fixed sleeve (31) and the outer diameter of the driving shaft (71).

7. The press-fitting device for positioning the bearings at both ends of the bridge driving shaft according to claim 5 is characterized in that: The outer periphery of the other end of the movable shaft (32) away from the positioning structure (20) is knurled and serves as a handle (32-3).

8. The press-fitting device for positioning the bearings at both ends of the bridge driving shaft according to claim 3 is characterized in that: The main control cabinet (61) and the mounting seat (62) are both provided with a start button (63), and the two start buttons (63) are electrically connected to the driving member (40) and are used to control the driving member (40) to push the active press-fitting structure (10) to move.

9. The press-fitting device for positioning the bearings at both ends of the bridge driving shaft according to claim 3, characterized in that: The top of the suspension frame (50) is provided with a plurality of hanging holes (53) along the length direction.

10. The press-fitting device for positioning the bearings at both ends of the bridge driving shaft according to any one of claims 1 to 9, characterized in that: One end of the active press-fitting structure (10) facing the positioning structure (20) is a second clamping portion (11), and a second boss (12) radially extends from the outer periphery of the second clamping portion (11), and the diameter of the second boss (12) is greater than the outer diameter of the active shaft (71).

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