Bridge swing structure and engineering machine

Abstract

The utility model discloses a bridge swing structure and engineering machinery, including drive axle, the middle part front end of drive axle is equipped with bearing seat, the inside of bearing seat is equipped with rotatable power input shaft, the bearing of bearing seat inside is passed through by power input shaft, the middle part rear end of drive axle is equipped with support axle, bearing seat, power input shaft, support axle three coaxial heart arrangement, the outer circumferential surface of bearing seat with the inner hole between front swing frame is set up second non -metal bushing, front swing frame can rotate around bearing seat, front swing frame can move along the axial movement of bearing seat, the outer circumferential surface of support axle with the inner hole between rear swing frame is set up first non -metal bushing, rear swing frame can rotate around support axle, the both sides of rear swing frame are provided with thrust washer, and the thrust washer of both sides restricts the axial movement of rear swing frame along support axle. Without axial gap adjustment, convenient to install.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to a bridge swing structure and engineering machinery. Background Technology

[0002] For existing bridge sway structures, see Figure 5 This includes the existing drive axle (17), the existing power input shaft (18), the existing pin (19), and the existing axle swing bracket (20). That is, a rigid bracket is installed on the drive axle as the axle swing bracket. The rigid bracket is connected to the vehicle frame through the pin, and the pin serves as the rotation center when the axle swings.

[0003] The shortcomings of existing technologies are: the installation of existing bridge swing structures is not convenient, and the axial clearance between the bridge swing frame and the pin installation point depends on manual adjustment. Utility Model Content

[0004] The purpose of this utility model is to provide a bridge swing structure and engineering machinery to solve the technical problems of poor installation convenience of existing bridge swing structures and the axial clearance at the bridge swing frame and pin installation point relying on manual adjustment.

[0005] To achieve the above objectives, the present invention provides a bridge swing structure, including a drive axle. A bearing housing is located at the front end of the drive axle's middle section. A rotatable power input shaft is located inside the bearing housing, passing through a bearing inside the bearing housing. A support shaft is located at the rear end of the drive axle's middle section. The bearing housing, the power input shaft, and the support shaft are coaxially arranged. A second non-metallic bushing is provided between the outer circumferential surface of the bearing housing and the inner hole of the front swing frame, allowing the front swing frame to rotate around the bearing housing and move axially along the bearing housing. A first non-metallic bushing is provided between the outer circumferential surface of the support shaft and the inner hole of the rear swing frame, allowing the rear swing frame to rotate around the support shaft. Thrust washers are provided on both sides of the rear swing frame, restricting the axial movement of the rear swing frame along the support shaft.

[0006] Furthermore, the front swing frame and the rear swing frame are provided with lubricating oil channels, which are used to lubricate the moving parts by adding grease.

[0007] Furthermore, a second sealing device is provided on both sides of the second non-metallic bushing, and a first sealing device is provided on both sides of the first non-metallic bushing. The second sealing device and the first sealing device prevent grease leakage or debris from entering the moving parts.

[0008] Furthermore, the second sealing device on both sides is a third O-ring, and the first sealing device on the front and rear sides is a first O-ring and a second O-ring, respectively.

[0009] Furthermore, a pressure plate is provided at the front edge of the inner hole of the front swing frame, and the pressure plate is connected to the front swing frame by a second bolt, and the pressure plate is in close fit with the third O-ring.

[0010] Furthermore, the rear end edge of the inner hole of the front swing frame is provided with an assembly step, the step opening of the assembly step faces forward, the third O-ring on the rear side is installed inside the assembly step, the front end edge of the inner hole of the front swing frame is provided with an annular flange, the third O-ring on the front side is installed inside the annular flange, the pressure plate is located in front of the annular flange, and the pressure plate and the annular flange are connected by a second bolt.

[0011] Furthermore, a limiting ring is provided at the rear end edge of the outer circumferential surface of the bearing housing. The limiting ring can form a limiting fit with the outer side of the assembly step, and the front end edge of the outer circumferential surface of the bearing housing can be used for the front swing frame to disengage outward.

[0012] Furthermore, the front end edge of the support shaft is fixed to the drive axle by a first bolt, and the front end edge of the support shaft is positioned on the drive axle by a locating pin. A pressure plate is provided behind the inner hole of the rear swing frame. The pressure plate is fixed to the rear end edge of the support shaft by a first bolt. The pressure plate presses against the first non-metallic bushing, the thrust washer, and the second O-ring.

[0013] Furthermore, the front end of the support shaft is provided with a radially expanding annular bending plate, and the rear end of the support shaft is provided with a radially narrowing mounting shaft. The annular bending plate is fixed to the drive axle by a first bolt. The inner hole of the rear swing frame is rotatably engaged with the outer circumferential surface of the mounting shaft through the first non-metallic bushing. The first non-metallic bushing, the thrust washer, the first O-ring, and the second O-ring are tightly engaged between the pressure plate, the rear swing frame, the mounting shaft of the support shaft, and the middle step.

[0014] This utility model also provides an engineering machinery, including a main body of the engineering machinery and a bridge swing structure as described in any of the above technical solutions, wherein the bridge swing structure is disposed on the main body of the engineering machinery.

[0015] In summary, the technical solution of this utility model has the following beneficial effects: The structure of this utility model is reasonable. (1) By setting a drive bridge, a bearing seat is provided at the front end of the middle of the drive bridge, and a rotatable power input shaft is provided inside the bearing seat. The power input shaft passes through the bearing inside the bearing seat, and a support shaft is provided at the rear end of the middle of the drive bridge. The bearing seat, the power input shaft, and the support shaft are coaxially arranged. Thus, the axis of the front swing frame and the rear swing frame coincides with the axis of the power input shaft. When the drive bridge swings, the power input shaft will not swing significantly with the drive bridge, which is beneficial to improving the reliability and life of the power input shaft. (2) By setting a second non-metallic bushing between the outer circumferential surface of the bearing seat and the inner hole of the front swing frame, the front swing frame can rotate around the bearing seat and can move along the axial direction of the bearing seat. Thus, the front swing frame has two degrees of freedom. It can rotate around the bearing seat of the power input shaft of the drive bridge and can also move a small range along the axial direction of the bearing seat. Thus, no clearance adjustment is required during installation, which is convenient for installation. The setting of the second non-metallic bushing can prevent wear between metals. (3) By setting a first non-metallic bushing between the outer circumferential surface of the support shaft and the inner hole of the rear swing frame, the rear swing frame can rotate around the support shaft. Thrust washers are set on both sides of the rear swing frame, and the thrust washers on both sides restrict the axial movement of the rear swing frame along the support shaft. Thus, by using the thrust washers on both sides to restrict the axial movement of the rear swing frame, the rear swing frame has only one degree of freedom, allowing only the rear swing frame to rotate around the support shaft. The setting of the first non-metallic bushing can prevent wear between metals. As can be seen from the above analysis, the front swing frame of this utility model can move a small range along the axial direction of the bearing seat, while the thrust washers on both sides restrict the axial movement of the rear swing frame. Therefore, the bridge swing structure of this utility model is superior to the existing bridge swing structure in terms of installation and operation, requiring no axial clearance adjustment and being convenient to install. Attached Figure Description

[0016] Figure 1 This is an exploded structural diagram of the present invention; Figure 2 This is a three-dimensional structural schematic diagram of the present invention; Figure 3 This is a cross-sectional structural diagram of the front swing frame area of ​​this utility model; Figure 4 This is a cross-sectional structural diagram of the rear swing frame area of ​​this utility model; Figure 5 This is a three-dimensional structural diagram of existing technology; Explanation of reference numerals in the attached drawings: Drive axle (1), rear swing bracket (2), first bolt (3), first O-ring (4), second O-ring (5), thrust washer (6), first non-metallic bushing (7), support shaft (8), pressure plate (9), locating pin (10), brake pipe (11), third O-ring (12), pressure plate (13), second bolt (14), second non-metallic bushing (15), front swing bracket (16); bearing housing (101), power input shaft (102), limit retaining ring (103); annular bent plate (801), mounting shaft (802), middle step (803); assembly step (1601), annular flange (1602). Existing drive axle (17), existing power input shaft (18), existing pin (19), existing axle swing bracket (20). Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model, but this does not constitute a limitation on the scope of protection of the present utility model.

[0018] In this utility model, for clearer description, the following explanation is provided: The observer faces the attached... Figure 1 In this observation, the observer's left rear side is designated as front, the observer's right front side as rear, the observer's left front side as right, the observer's right rear side as left, the observer's top as up, and the observer's bottom as down. It should be noted that the terms "front end," "rear end," "left side," "right side," "middle," "above," and "below" used in this document indicate the orientation or positional relationship based on the accompanying drawings. These are merely for the purpose of clearly describing this utility model and do not indicate or imply that the structure or component referred to must have a specific orientation or be constructed in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," "third," and "fourth" are used only for the purpose of clarity or simplification of description and should not be construed as indicating or implying relative importance or quantity.

[0019] See Figures 1 to 4This embodiment provides a bridge swing structure, including a drive bridge 1. A bearing housing 101 is provided at the front end of the middle of the drive bridge 1. A rotatable power input shaft 102 is provided inside the bearing housing 101. The power input shaft 102 passes through a bearing inside the bearing housing 101. A support shaft 8 is provided at the rear end of the middle of the drive bridge 1. The bearing housing 101, the power input shaft 102, and the support shaft 8 are coaxially arranged. A second non-metallic bushing 15 is provided between the outer circumferential surface of the bearing housing 101 and the inner hole of the front swing frame 16. The front swing frame 16 can rotate around the bearing housing 101 and can move along the axial direction of the bearing housing 101. A first non-metallic bushing 7 is provided between the outer circumferential surface of the support shaft 8 and the inner hole of the rear swing frame 2. The rear swing frame 2 can rotate around the support shaft 8. Thrust washers 6 are provided on both sides of the rear swing frame 2. The thrust washers 6 on both sides restrict the axial movement of the rear swing frame 2 along the support shaft 8. Functions: (1) By setting a drive axle, a bearing housing is provided at the front end of the middle of the drive axle, and a rotatable power input shaft is provided inside the bearing housing. The power input shaft passes through the bearing inside the bearing housing, and a support shaft is provided at the rear end of the middle of the drive axle. The bearing housing, power input shaft, and support shaft are coaxially arranged. Thus, the axis of the front swing frame and the rear swing frame coincides with the axis of the power input shaft. In this way, when the drive axle swings, the power input shaft will not swing significantly with the drive axle, which is beneficial to improving the reliability and life of the power input shaft. (2) By setting a second non-metallic bushing between the outer circumferential surface of the bearing housing and the inner hole of the front swing frame, the front swing frame can rotate around the bearing housing and can move along the axial direction of the bearing housing. Thus, the front swing frame has two degrees of freedom. It can rotate around the bearing housing of the power input shaft of the drive axle and can also move a small range along the axial direction of the bearing housing. In this way, no clearance adjustment is required during installation, which is convenient for installation. The setting of the second non-metallic bushing can prevent wear between metals. (3) By setting a first non-metallic bushing between the outer circumferential surface of the support shaft and the inner hole of the rear swing frame, the rear swing frame can rotate around the support shaft. Thrust washers are set on both sides of the rear swing frame, and the thrust washers on both sides restrict the axial movement of the rear swing frame along the support shaft. Thus, by using the thrust washers on both sides to restrict the axial movement of the rear swing frame, the rear swing frame has only one degree of freedom, allowing only the rear swing frame to rotate around the support shaft. The setting of the first non-metallic bushing can prevent wear between metals. As can be seen from the above analysis, the front swing frame of this utility model can move a small range along the axial direction of the bearing seat, while the thrust washers on both sides restrict the axial movement of the rear swing frame. Therefore, the bridge swing structure of this utility model is superior to the existing bridge swing structure in terms of installation and operation, requiring no axial clearance adjustment and being convenient to install.

[0020] Specifically, the front swing frame 16 and the rear swing frame 2 are provided with lubricating oil channels for adding grease to lubricate the moving parts. Function: The lubricating oil channels on the front swing frame 16 and the rear swing frame 2 are provided for adding grease to lubricate the moving parts.

[0021] Specifically, a second sealing device is provided on both sides of the second non-metallic bushing 15, and a first sealing device is provided on both sides of the first non-metallic bushing 7. The second and first sealing devices prevent grease leakage or debris from entering the moving parts. Function: The sealing devices on both sides of the bushing prevent grease leakage or debris from entering the moving parts.

[0022] Specifically, the second sealing device on both sides is the third O-ring 12, and the first sealing devices on the front and rear sides are the first O-ring 4 and the second O-ring 5, respectively. Function: The sealing solution uses O-rings, which offers a cost advantage.

[0023] Specifically, a pressure plate 13 is provided at the front edge of the inner hole of the front swing frame 16. The pressure plate 13 is connected to the front swing frame 16 by a second bolt 14, and the pressure plate 13 is tightly fitted with a third O-ring 12. Function: The installation of the pressure plate 13 prevents components such as the third O-ring 12 from detaching from the inner hole of the front swing frame 16. This new front swing frame 16 of the patent is superior to the original swing frame in terms of installation operation. During bolt installation, it can automatically align with the mounting hole using bolt guidance, eliminating the need for manual adjustment of axial clearance, resulting in better assembly processability.

[0024] Specifically, the rear end edge of the inner hole of the front swing frame 16 is provided with an assembly step 1601, the step opening of the assembly step 1601 faces forward, and the rear third O-ring 12 is installed inside the assembly step 1601. The front end edge of the inner hole of the front swing frame 16 is provided with an annular flange 1602, and the front third O-ring 12 is installed inside the annular flange 1602. The pressure plate 13 is located in front of the annular flange 1602, and the pressure plate 13 is connected to the annular flange 1602 by a second bolt 14. Function: The assembly step 1601 can prevent the third O-ring 12 and other components from detaching from the inner hole of the front swing frame 16, while the annular flange 1602 facilitates connection with the pressure plate 13 by the second bolt 14.

[0025] Specifically, a limiting ring 103 is provided at the rear end edge of the outer circumferential surface of the bearing housing 101. The limiting ring 103 can form a limiting fit with the outer side of the mounting step 1601, and the front end edge of the outer circumferential surface of the bearing housing 101 can allow the front swing frame 16 to disengage outward. Function: This arrangement facilitates the small-range movement of the front swing frame 16 along the axial direction of the bearing housing, and also facilitates the installation and disassembly of the front swing frame 16.

[0026] Specifically, the front edge of the support shaft 8 is fixed to the drive axle 1 by the first bolt 3, and the front edge of the support shaft 8 is positioned on the drive axle 1 by the locating pin 10. A pressure plate 9 is provided behind the inner hole of the rear swing frame 2. The pressure plate 9 is fixed to the rear end edge of the support shaft 8 by the first bolt 3. The pressure plate 9 presses the first non-metallic bushing 7, the thrust washer 6, and the second O-ring 5. Function: The setting of the pressure plate 9 allows the thrust washer 6, the second O-ring 5, the first O-ring 4, and the first non-metallic bushing 7 on both sides of the rear swing frame 2 to be directly or indirectly pressed, preventing the rear swing frame 2 from loosening or having insufficient internal sealing during operation.

[0027] Specifically, the front end of the support shaft 8 is provided with a radially expanding annular bent plate 801, and the rear end of the support shaft 8 is provided with a radially narrowing mounting shaft 802. The annular bent plate 801 is fixed to the drive axle 1 by the first bolt 3. The inner hole of the rear swing frame 2 is rotatably engaged with the outer circumferential surface of the mounting shaft 802 through the first non-metallic bushing 7. The first non-metallic bushing 7, the thrust washer 6, the first O-ring 4, and the second O-ring 5 are tightly engaged between the pressure plate 9, the rear swing frame 2, the mounting shaft 802 of the support shaft 8, and the middle step 803. Function: This structural arrangement of the support shaft 8 ensures that the front edge of the thrust washer 6, the first O-ring 4, and the first non-metallic bushing 7 is limited by the middle step 803, while the rear edge of the thrust washer 6, the second O-ring 5, and the rear edge of the first non-metallic bushing 7 is limited by the pressure plate 9.

[0028] It is worth noting that the structure of the drive axle 1 itself is existing technology, so it will not be described in detail here. The power input shaft 102 can transmit power from outside the drive axle 1 to its interior. In actual operation, the left and right ends of the drive axle 1 can also be used in conjunction with the brake pipe 11, which is also conventional technology and will not be described in detail here.

[0029] This utility model also provides an engineering machinery, including a main body of the engineering machinery and a bridge swing structure according to any of the above-mentioned technical solutions, wherein the bridge swing structure is disposed on the main body of the engineering machinery. Function: The bridge swing structure of this utility model can be applied to working conditions where the drive axle needs to swing at a certain angle, especially in engineering machinery, such as loaders. Drive axle swing is used to improve the vehicle's passability and adaptability on uneven road surfaces, ensure tire contact with the ground on complex road surfaces, avoid one-sided wheel suspension, and improve tire adhesion and vehicle stability. Compared with the original swing frame, the total cost of the front and rear swing frames of this utility model is basically the same, but the swing frame structure is optimized.

[0030] In summary: 1. This utility model achieves the installation and swinging of the drive axle through a front swing frame and a rear swing frame. The swing frame is coaxial with the power input shaft. When the drive axle swings, the power input shaft will not swing significantly with the drive axle, which is beneficial to improving the reliability and lifespan of the power input shaft. 2. The front swing frame of this utility model can move within a small range along the axial direction of the bearing seat, while the thrust washers on both sides restrict the axial movement of the rear swing frame. Therefore, the bridge swinging structure of this utility model does not require clearance adjustment and is easy to install. 3. The bridge swing frame structure of this utility model is more compact, saving installation space. Furthermore, the saved space on the upper part of the axle facilitates the installation of other components.

[0031] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A bridge swing structure, comprising a drive axle (1), characterized in that: The drive axle (1) has a bearing housing (101) at its front middle section. A rotatable power input shaft (102) is provided inside the bearing housing (101). The power input shaft (102) passes through the bearing inside the bearing housing (101). A support shaft (8) is provided at the rear middle section of the drive axle (1). The bearing housing (101), the power input shaft (102), and the support shaft (8) are coaxially arranged. A second non-metallic material is provided between the outer circumferential surface of the bearing housing (101) and the inner hole of the front swing frame (16). Bushing (15), the front swing frame (16) can rotate around the bearing seat (101), the front swing frame (16) can move along the axial direction of the bearing seat (101); a first non-metallic bushing (7) is provided between the outer circumferential surface of the support shaft (8) and the inner hole of the rear swing frame (2), the rear swing frame (2) can rotate around the support shaft (8), thrust washers (6) are provided on both sides of the rear swing frame (2), the thrust washers (6) on both sides restrict the rear swing frame (2) from moving along the axial direction of the support shaft (8).

2. The bridge swing structure according to claim 1, characterized in that: The front swing frame (16) and the rear swing frame (2) are provided with lubricating oil channels, which are used to lubricate the moving parts by adding grease.

3. The bridge swing structure according to claim 2, characterized in that: The second non-metallic bushing (15) is provided with a second sealing device on both sides, and the first non-metallic bushing (7) is provided with a first sealing device on both sides. The second sealing device and the first sealing device prevent grease leakage or debris from entering the moving parts.

4. The bridge swing structure according to claim 3, characterized in that: The second sealing device on both sides is the third O-ring (12), and the first sealing devices on the front and rear sides are the first O-ring (4) and the second O-ring (5), respectively.

5. The bridge swing structure according to claim 4, characterized in that: The front edge of the inner hole of the front swing frame (16) is provided with a pressure plate (13). The pressure plate (13) is connected to the front swing frame (16) by a second bolt (14). The pressure plate (13) is in close contact with the third O-ring (12).

6. The bridge swing structure according to claim 5, characterized in that: The rear end edge of the inner hole of the front swing frame (16) is provided with an assembly step (1601), the step opening of the assembly step (1601) faces forward, the third O-ring (12) on the rear side is installed inside the assembly step (1601), the front end edge of the inner hole of the front swing frame (16) is provided with an annular flange (1602), the third O-ring (12) on the front side is installed inside the annular flange (1602), the pressure plate (13) is located in front of the annular flange (1602), and the pressure plate (13) and the annular flange (1602) are connected by a second bolt (14).

7. The bridge swing structure according to claim 6, characterized in that: The bearing housing (101) has a limiting ring (103) at the rear end edge of its outer circumferential surface. The limiting ring (103) can form a limiting fit with the outer side of the assembly step (1601). The front end edge of the outer circumferential surface of the bearing housing (101) can be used for the front swing frame (16) to detach outward.

8. A bridge swing structure according to any one of claims 4 to 7, characterized in that: The front edge of the support shaft (8) is fixed to the drive axle (1) by the first bolt (3). The front edge of the support shaft (8) is positioned on the drive axle (1) by the positioning pin (10). A pressure plate (9) is provided behind the inner hole of the rear swing frame (2). The pressure plate (9) is fixed to the rear end edge of the support shaft (8) by the first bolt (3). The pressure plate (9) presses the first non-metallic bushing (7), the thrust washer (6), and the second O-ring (5).

9. The bridge swing structure according to claim 8, characterized in that: The front end of the support shaft (8) is provided with an annular bending plate (801) that expands radially, and the rear end of the support shaft (8) is provided with an installation shaft (802) that shrinks radially. The annular bending plate (801) is fixed on the drive axle (1) by the first bolt (3). The inner hole of the rear swing frame (2) is rotatably engaged with the outer circumferential surface of the installation shaft (802) through the first non-metallic bushing (7). The first non-metallic bushing (7), the thrust washer (6), the first O-ring (4), and the second O-ring (5) are tightly engaged between the pressure plate (9), the rear swing frame (2), the installation shaft (802) of the support shaft (8), and the middle step (803).

10. An engineering machinery, comprising an engineering machinery body, characterized in that: It also includes the bridge swing structure according to any one of claims 1 to 9, wherein the bridge swing structure is disposed on the main body of the engineering machinery.

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