Bulldozer with chassis pivot connection

Abstract

The utility model discloses a bulldozer with chassis pivot connection structure, including including pivot, one end of pivot is connected with first fixed establishment, pivot includes pivot main part, the both sides symmetrical of pivot main part are provided with pivot side end, be provided with first fixed hole on the pivot side end, first fixed establishment includes installation assembly, be provided with wear shaft subassembly in installation assembly, pivot is inserted in wear shaft subassembly, install the pressing plate subassembly on the lateral wall of installation assembly, be provided with fixed assembly on the pressing plate subassembly, through setting up pivot insertion in wear shaft subassembly, installation assembly fixed wear shaft subassembly's position, after fixed assembly passes through the pressing plate subassembly, will pivot with installation assembly fixed, form stable axial connection structure, first increment component sets up in the position of pivot and installation assembly adhesion, reach convenient assembly and disassembly pivot and convenient effect through first increment component adjustment to pivot axial pre -tightening force.

Description

Technical Field

[0001] This utility model relates to the field of bulldozer technology, and more specifically, to a bulldozer with a chassis pivot connection structure. Background Technology

[0002] A bulldozer is a heavy-duty construction machine mainly used for short-distance transport of soil, gravel, or clearing of obstacles. It is commonly used in road construction, mining, and land leveling projects. Its core components are the front-mounted bulldozer blade and the powerful tracked chassis, which provide excellent traction and maneuverability.

[0003] Currently, the chassis pivot of bulldozers on the market is a key component connecting the traveling mechanism and the main frame. It bears the pivot function of transmitting the weight of the whole machine and steering torque. Under long-term high load and strong vibration conditions, it is prone to wear, fatigue cracks and loose connections. The connection structure commonly used for bulldozer pivots is half-shaft press-fit type and half-shaft flange mounting type.

[0004] However, the half-shaft press-fit structure requires freezing or heating and needs to be pressed in with tooling, which is inconvenient for assembly and disassembly; the half-shaft flange mounting structure relies on bolts for fixing, which is difficult to tighten after the bolts loosen due to structural limitations, and it is also inconvenient to adjust the center of the trolley frame.

[0005] Therefore, this utility model proposes a bulldozer with a chassis pivot connection structure. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a bulldozer with a chassis pivot connection structure.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A bulldozer with a chassis pivot connection structure includes a pivot, one end of which is connected to a first fixing mechanism. The pivot includes a pivot body, with pivot side ends symmetrically arranged on both sides of the pivot body. A first fixing hole is provided on each pivot side end. The first fixing mechanism includes an installation assembly, with a through-shaft assembly disposed within the installation assembly. The pivot is inserted into the through-shaft assembly. A pressure plate assembly is installed on the side wall of the installation assembly, and a fixing assembly is adapted to the pressure plate assembly. The fixing assembly is adapted to the first fixing hole. A first incremental assembly is provided at the end of the pivot body near the pressure plate assembly.

[0008] The present invention is further configured such that: the mounting component includes a mounting body, a connecting hole and a fixing hole are respectively provided on both sides of the mounting body, a protective hole is also provided on the same side of the fixing hole of the mounting body, the mounting component passes through the connecting hole and abuts against the fixing hole, and a positioning hole is provided on the top of the mounting body.

[0009] The present invention is further configured such that: the through-shaft assembly includes a through-shaft body, the through-shaft body is provided with a through-shaft groove, the through-shaft body is provided with an oil injection hole on its upper part, and the pivot body is inserted into the through-shaft groove.

[0010] The present invention is further configured such that: the first incremental component includes a gasket body, and the gasket body is symmetrically provided with a first gasket groove and a second gasket groove.

[0011] The present invention is further configured such that: the pressure plate assembly includes a pressure plate body, the pressure plate body is fixed on the mounting assembly, and the pressure plate body is provided with a first limiting hole and a second limiting hole.

[0012] The present invention is further configured such that the fixing component includes a first positioning bolt and a second positioning bolt, the first positioning bolt and the second positioning bolt being adapted to the second limiting hole and the second positioning bolt, respectively.

[0013] The present invention is further configured such that: the first fixing mechanism further includes a sealing plug, which is adapted to the oil injection hole after passing through the mounting assembly.

[0014] The present invention is further configured such that: a protective component is provided on one side of the fixing hole, the protective component includes a protective block and a protective bolt, the protective block is provided with a protective mounting groove, and the protective bolt passes through the protective block and is adapted to the protective hole.

[0015] The present invention is further configured such that: a second fixing mechanism is installed at the other end of the pivot, and the structure of the second fixing mechanism is the same as that of the first fixing mechanism.

[0016] The present invention is further configured such that: the bulldozer also includes a frame assembly, a left trolley frame and a right trolley frame are respectively provided on both sides of the frame assembly, and a first pressure shaft assembly and a second pressure shaft assembly are fixed on both sides of the frame assembly.

[0017] In summary, this application includes at least the following beneficial technical effects: By setting the pivot to be inserted into the through-shaft assembly, the mounting assembly fixes the position of the through-shaft assembly, and the fixing assembly passes through the pressure plate assembly to fix the pivot to the mounting assembly, forming a stable axial connection structure. The first incremental assembly is set at the position where the pivot and the mounting assembly fit together, so as to facilitate the assembly and disassembly of the pivot and the adjustment of the axial preload of the pivot through the first incremental assembly. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a bulldozer according to the present invention; Figure 2 for Figure 1 A partial diagram of the exploded structure; Figure 3 for Figure 2 A schematic diagram of the overall structure of the mid-rack assembly; Figure 4 for Figure 1 A schematic diagram of the cooperation structure between the first and second fixing mechanisms and the pivot. Figure 5 for Figure 4 A schematic diagram of the exploded structure; Figure 6 for Figure 5 A schematic diagram of the overall structure of the central axis; Figure 7 for Figure 5 Schematic diagram of the exploded structure of the first fixed mechanism; Figure 8 for Figure 3 Side view; Figure 9 for Figure 8 A cross-sectional view along the direction of the first positioning bolt.

[0019] Figure 10 for Figure 9 A magnified structural diagram at point C.

[0020] Figure 11 for Figure 8 A cross-sectional view along the direction of the second positioning bolt.

[0021] Figure 12 for Figure 11 A magnified structural diagram at point D.

[0022] Explanation of reference numerals in the attached diagram: 1. Left chassis; 2. First pressure shaft assembly; 21. Upper pressure shaft plate; 22. Lower pressure shaft plate; 23. Pressure shaft bolt; 3. Rack assembly; 31. Rack body; 32. Mounting slot; 33. Protective slot; 4. Second pressure shaft assembly; 5. Pivot; 51. Pivot body; 52. Pivot side end; 53. First fixing hole; 54. Second fixing hole; 6. Right side frame; 7. First fixing mechanism; 71. Mounting assembly; 711. Mounting body; 712. Positioning hole; 713. Connecting hole; 714. Fixing hole; 715. Protective hole; 72. Sealing plug; 73. Through-shaft assembly; 731. Through-shaft body; 732. Through-shaft groove; 733. Oil injection hole; 74. First incremental assembly; 741. Gasket body; 742. First gasket groove; 743. Second gasket groove; 75. Second gasket body; 76. Pressure plate assembly; 761. Pressure plate body; 762. First limiting hole; 763. Second limiting hole; 77. Fixing assembly; 771. First positioning bolt; 772. Second positioning bolt; 78. Protective assembly; 781. Protective block; 782. Protective mounting groove; 783. Protective bolt; 8. Second fixed mechanism. Detailed Implementation

[0023] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] It should be noted that when a component is referred to as "connected to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Throughout this specification, reference to "an embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of this application. Therefore, the phrases "in one embodiment," "in some embodiments," or "in some of these embodiments" appear in various places throughout the specification, and not all refer to the same embodiment. Furthermore, in one or more embodiments, a particular feature, structure, or characteristic may be combined in any suitable manner.

[0028] Please see Figure 1-12 The present invention provides the following technical solution: Example 1, See Figure 1 and Figure 2 The bulldozer includes a frame assembly 3, with a left trolley frame 1 and a right trolley frame 6 respectively on both sides of the frame assembly 3. A first pressure shaft assembly 2 and a second pressure shaft assembly 4 are fixed on both sides of the frame assembly 3. A pivot 5 is inserted through the frame assembly 3. One end of the pivot 5 is connected to a first fixing mechanism 7, and the other end of the pivot 5 is equipped with a second fixing mechanism 8. The structure of the second fixing mechanism 8 is the same as that of the first fixing mechanism 7.

[0029] The frame assembly 3 provides installation positions for the first pressure shaft assembly 2, the frame assembly 3, and the second pressure shaft assembly 4. The pivot 5 passes through the frame assembly 3. The first fixing mechanism 7 is fixed to the left trolley frame 1, and the second fixing mechanism 8 is fixed to the right trolley frame 6. The two ends of the pivot 5 are fixed to the first fixing mechanism 7 and the second fixing mechanism 8, respectively, thereby restricting the position of the left trolley frame 1 and the right trolley frame 6, keeping the positions of the left trolley frame 1 and the right trolley frame 6 properly aligned, avoiding uneven loading, and ensuring the stability of the bulldozer. The first pressure shaft assembly 2 and the second pressure shaft assembly 4 play a role in strengthening support and protection on the outside of the frame assembly 3, restricting the position of the pivot 5, preventing the pivot 5 from moving axially, and ensuring smooth and reliable power transmission. After the pivot 5 passes through the frame assembly 3, the first fixing mechanism 7 and the second fixing mechanism 8, respectively set in the left trolley frame 1 and the right trolley frame 6, fix the position of the pivot 5.

[0030] See Figure 3 The frame assembly 3 includes a frame body 31, on which mounting slots 32 are symmetrically arranged. A protective slot 33 is provided in the middle of the frame body 31. The protective slot 33 connects the two mounting slots 32 and provides guiding support for the pivot 5. The mounting slots 32 limit the pivot 5 to prevent it from running radially. The protective slot 33 is clearance-fitted with the pivot 5 to ensure that the pivot 5 slides smoothly along the axial direction, which facilitates the adjustment of the position of the pivot 5 on the frame body 31 to adapt to the purpose of centering the pivot 5 under different working conditions.

[0031] See Figure 1The first pressure shaft assembly 2 includes an upper pressure shaft plate 21, a lower pressure shaft plate 22, and a pressure shaft bolt 23. The upper pressure shaft plate 21 and the lower pressure shaft plate 22 are adaptively arranged. The upper pressure shaft plate 21 is fixed to the outside of the frame body 31, and the lower pressure shaft plate 22 is fixed to the upper pressure shaft plate 21 by the pressure shaft bolt 23. The upper pressure shaft plate 21 and the lower pressure shaft plate 22 cooperate to form a circular through hole and a mounting groove 32 to cover the pivot 5, thereby achieving radial constraint on the pivot 5, suppressing the radial vibration of the pivot 5 during operation, and effectively limiting the axial displacement of the pivot 5 by fixing it with the pressure shaft bolt 23, avoiding loosening caused by vibration or load changes, and improving structural stability. The preload of the pressure shaft bolt 23 is adjustable, thereby controlling the clamping force between the upper pressure shaft plate 21 and the lower pressure shaft plate 22, adapting to pivots 5 of different sizes, improving assembly accuracy and maintenance convenience.

[0032] The structure of the second pressure shaft assembly 4 is exactly the same as that of the first pressure shaft assembly 2. The second pressure shaft assembly 4 and the first pressure shaft assembly 2 are symmetrically arranged on both sides of the frame assembly 3, together covering the pivot 5 and providing equal radial constraint force to ensure the coaxiality of the pivot 5 during operation. The second pressure shaft assembly 4 and the first pressure shaft assembly 2 correspond to the mounting grooves 32 on both sides of the frame body 31, so that the pivot 5 is subjected to balanced force during axial adjustment and avoids unilateral force.

[0033] See Figure 3 , Figure 4 , Figure 5 and Figure 6 The pivot 5 includes a pivot body 51, with pivot side ends 52 symmetrically arranged on both sides of the pivot body 51. The pivot side ends 52 are provided with a first fixing hole 53 and a second fixing hole 54. The pivot body 51 fits into the mounting groove 32, so that the pivot 5 is accurately positioned in the frame body 31. The pivot 5 is inserted into the frame body 31 through the mounting groove 32, and the pivot 5 is axially guided while being protected by the protective groove 33. The first fixing hole 53 and the second fixing hole 54 cooperate to restrict the position of the pivot body 51.

[0034] See Figure 7 , Figure 8 and Figure 9The first fixing mechanism 7 includes an installation component 71, within which a through-shaft component 73 is provided. The pivot 5 is inserted into the through-shaft component 73. A pressure plate component 76 is installed on the side wall of the installation component 71. A fixing component 77 is adapted to the pressure plate component 76. The fixing component 77 is adapted to the first fixing hole 53. The installation component 71 and the through-shaft component 73 form a sealed fit, facilitating the insertion and removal of the pivot 5 and preventing external impurities from entering the mating area. The fixing component 77 is inserted into the pressure plate component 76 and fixed to one end of the pivot 5. The fixing component 77 fixes the first fixing hole 53 and the second fixing hole 54, so that one end of the pivot body 51 is tightly fixed to the pressure plate component 76. A sealing ring is provided on the pressure plate component 76 to prevent lubricating oil leakage. The fixing component 77 cooperates with the first fixing hole 53 and the second fixing hole 54 to achieve axial locking and prevent the pivot 5 from axially moving during operation.

[0035] The mounting assembly 71 includes a mounting body 711. A connecting hole 713 and a fixing hole 714 are respectively provided on both sides of the mounting body 711. A protective hole 715 is also provided on the same side as the fixing hole 714. The mounting assembly 71 passes through the connecting hole 713 and abuts against the fixing hole 714. A positioning hole 712 is provided on the top of the mounting body 711. The mounting body 711 is fixed to the left trolley frame 1, providing an installation position. The size of the connecting hole 713 is adapted to the through-shaft assembly 73 for easy positioning. The first fixing mechanism 7 also includes a sealing plug 72, which passes through the mounting assembly 71 and is adapted to the oil injection hole 733.

[0036] See Figures 8 to 12 The through-shaft assembly 73 includes a through-shaft body 731, a through-shaft groove 732 is provided inside the through-shaft body 731, and an oil injection hole 733 is provided on the top of the through-shaft body 731. The pivot body 51 is inserted into the through-shaft groove 732. The through-shaft groove 732 fits tightly with the outer wall of the pivot body 51 to achieve radial positioning. The oil injection hole 733 cooperates with the sealing plug 72 to deliver lubricating oil to the through-shaft body 731.

[0037] A first incremental component 74 is provided at one end of the pivot body 51 near the pressure plate assembly 76. The first incremental component 74 includes a gasket body 741, on which a first gasket groove 742 and a second gasket groove 743 are symmetrically arranged. The first incremental component 74 is used to adjust the position of the pivot 5. The first fixing mechanism 7 also includes a second gasket body 75. Both the first incremental component 74 and the second gasket body 75 are used to fine-tune the axial preload of the pivot 5. The first gasket groove 742 and the second gasket groove 743 are adapted to the fixing component 77, so that the fixing component 77 can pass through and be fixed to the pivot 5.

[0038] The pressure plate assembly 76 includes a pressure plate body 761, which is fixed to the mounting assembly 71. The pressure plate body 761 is provided with a first limiting hole 762 and a second limiting hole 763. The pressure plate assembly 76 is fixed to the outside of the fixing hole 714, and the pressure plate body 761 is threaded to the outer wall of the fixing hole 714. The first limiting hole 762 and the second limiting hole 763 are respectively provided with the second gasket groove 743 and the first gasket groove 742. The first limiting hole 762 cooperates with the second gasket groove 743, and the second limiting hole 763 cooperates with the first gasket groove 742. Both are used to fix the assembly 77 and the pivot 5 to achieve precise positioning.

[0039] The fixing assembly 77 includes a first positioning bolt 771 and a second positioning bolt 772, which are respectively adapted to the second limiting hole 763 and the second positioning bolt 772. The fixing assembly 77 fixes the position of the pivot 5. The first positioning bolt 771 passes through the second limiting hole 763 and the first gasket groove 742 and engages with the connecting hole at the end of the pivot 5, thus fixing the first positioning bolt 771 in the first fixing hole 53. The second positioning bolt 772 passes through the first limiting hole 762 and connects to the second gasket groove 743, thus fixing the second positioning bolt 772 in the second fixing hole 54. The symmetrical arrangement of the first positioning bolt 771 and the second positioning bolt 772 achieves force balance, ensuring the axial stability of the pivot 5. A protective component 78 is provided on one side of the fixing hole 714. The protective component 78 includes a protective block 781 and a protective bolt 783. The protective block 781 is provided with a protective mounting groove 782. The protective bolt 783 passes through the protective block 781 and is adapted to the protective hole 715. The protective component 78 protects the connection between the pressure plate assembly 76 and the fixing assembly 77, preventing external impurities from entering the connection area and affecting the fitting accuracy. The protective mounting groove 782 and the protective hole 715 cooperate to form an axial groove. The protective bolt 783 passes through the protective mounting groove 782 and is fixed to the protective hole 715, fixing the protective component 78 to the outer wall of the fixing hole 714, effectively improving the sealing performance of the overall structure.

[0040] The first fixing mechanism 7 fixes one end of the pivot 5. The second fixing mechanism 8 has the same structure as the first fixing mechanism 7. The second fixing mechanism 8 symmetrically fixes the other end of the pivot 5 in the right platform frame 6.

[0041] By setting the pivot 5 to be inserted into the through-shaft assembly 73, the mounting assembly 71 fixes the position of the through-shaft assembly 73, and the fixing assembly 77 passes through the pressure plate assembly 76 to fix the pivot 5 and the mounting assembly 71, forming a stable axial connection structure. The first incremental assembly 74 is set at the position where the pivot 5 and the mounting assembly 71 fit together, so as to facilitate the assembly and disassembly of the pivot 5 and to facilitate the adjustment of the axial preload of the pivot 5 through the first incremental assembly 74.

[0042] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A bulldozer with a chassis pivot connection structure, characterized in that: The device includes a pivot (5), one end of which is connected to a first fixing mechanism (7). The pivot (5) includes a pivot body (51), and pivot side ends (52) are symmetrically arranged on both sides of the pivot body (51). A first fixing hole (53) is provided on the pivot side end (52). The first fixing mechanism (7) includes an installation component (71), and a through-shaft component (73) is provided inside the installation component (71). The pivot (5) is inserted into the through-shaft component (73). A pressure plate component (76) is installed on the side wall of the installation component (71). A fixing component (77) is adapted to be provided on the pressure plate component (76). The fixing component (77) is adapted to be provided with the first fixing hole (53). A first incremental component (74) is provided at the end of the pivot body (51) near the pressure plate component (76).

2. A bulldozer with a chassis pivot connection structure according to claim 1, characterized in that: The mounting assembly (71) includes a mounting body (711), on which a connecting hole (713) and a fixing hole (714) are respectively provided on both sides. The mounting body (711) also has a protective hole (715) on the same side as the fixing hole (714). The mounting assembly (71) passes through the connecting hole (713) and abuts against the fixing hole (714). A positioning hole (712) is provided on the top of the mounting body (711).

3. A bulldozer with a chassis pivot connection structure according to claim 2, characterized in that: The through-shaft assembly (73) includes a through-shaft body (731), a through-shaft groove (732) is provided inside the through-shaft body (731), an oil injection hole (733) is provided above the through-shaft body (731), and the pivot body (51) is inserted into the through-shaft groove (732).

4. A bulldozer with a chassis pivot connection structure according to claim 1, characterized in that: The first incremental component (74) includes a gasket body (741), on which a first gasket groove (742) and a second gasket groove (743) are symmetrically arranged.

5. A bulldozer with a chassis pivot connection structure according to claim 1, characterized in that: The pressure plate assembly (76) includes a pressure plate body (761), which is fixed on the mounting assembly (71). The pressure plate body (761) is provided with a first limiting hole (762) and a second limiting hole (763).

6. A bulldozer with a chassis pivot connection structure according to claim 5, characterized in that: The fixing component (77) includes a first positioning bolt (771) and a second positioning bolt (772), which are adapted to the second limiting hole (763) and the second positioning bolt (772), respectively.

7. A bulldozer with a chassis pivot connection structure according to claim 3, characterized in that: The first fixing mechanism (7) also includes a sealing plug (72), which passes through the mounting assembly (71) and is adapted to the oil injection hole (733).

8. A bulldozer with a chassis pivot connection structure according to claim 2, characterized in that: A protective component (78) is provided on one side of the fixing hole (714). The protective component (78) includes a protective block (781) and a protective bolt (783). A protective mounting groove (782) is provided on the protective block (781). The protective bolt (783) passes through the protective block (781) and is adapted to the protective hole (715).

9. A bulldozer with a chassis pivot connection structure according to claim 1, characterized in that: The other end of the pivot (5) is equipped with a second fixing mechanism (8), the structure of which is the same as that of the first fixing mechanism (7).

10. A bulldozer with a chassis pivot connection structure according to claim 1, characterized in that: The bulldozer also includes a frame assembly (3), on which a left trolley frame (1) and a right trolley frame (6) are respectively provided on both sides. A first pressure shaft assembly (2) and a second pressure shaft assembly (4) are fixed on both sides of the frame assembly (3).

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