An adjustable connection seat assembly and a bulldozer

Abstract

The utility model discloses an adjustable connecting seat assembly and bulldozer, include: connecting seat, its inside is equipped with the cylindrical cavity, and the left and right ends of cylindrical cavity are processed with the internal thread of opposite rotation, and the oil nozzle installation hole and the screw plug installation hole that are communicated with cylindrical cavity are seted up on the lateral wall of connecting seat, and the oil nozzle and screw plug are installed, screw rod subassembly, including left screw rod and right screw rod, and one end of left and right screw rod is assembly end, and the other end is the threaded end, and installs relevant joint bearing in assembly end, and joint bearing is through the baffle ring axial location, and the left end of connecting seat is equipped with the positioning pin hole, and the positioning pin is worn positioning pin hole and is with left screw rod abuts, and the end of positioning pin is installed with the split pin, and two adjusting blocks are symmetrically installed in the upper and lower side outer wall of connecting seat, and the middle part of adjusting block is equipped with the through -hole. The utility model discloses adjustable connecting seat assembly, and multi -angle adaptability is strong, and the operation demand of adapting bulldozer universal shovel is adapted, and length adjustment is convenient and efficient, and can be flexibly adapted into the angle demand of soil.

Description

Technical Field

[0001] This utility model relates to an adjustable connecting seat assembly and a bulldozer, belonging to the field of bulldozer technology. Background Technology

[0002] As the core working component that directly contacts the working medium (soil, gravel, rock, etc.), the bulldozer blade's connection stability with the machine body and its adaptability to the working angle are key factors determining the bulldozer's operating efficiency, work quality, and equipment wear rate. In actual construction scenarios, the physical characteristics of the working medium vary significantly: for example, when working in soft soil, the entry angle needs to be reduced to avoid blade stagnation, while when working in hard rock or dense gravel, the entry angle needs to be increased to improve cutting ability. If the blade's entry angle cannot be flexibly adjusted according to the characteristics of different media, it will not only lead to a decrease in operating efficiency (such as reduced bulldozing volume and extended work cycle time), but may also exacerbate component wear due to uneven force on the blade, increasing equipment maintenance costs and downtime risks.

[0003] The existing connection structure between the bulldozer blade and the body is mostly fixed, which can only meet the operational needs under a single working condition and is difficult to adapt to the construction requirements of multiple media and multiple scenarios. There is an urgent need for a connection structure that can flexibly adjust the soil entry angle to solve the performance adaptation problem under different working media and improve the overall operating performance and scenario adaptability of the bulldozer. Summary of the Invention

[0004] To address the problems existing in the prior art, this utility model provides an adjustable connecting seat assembly and a bulldozer.

[0005] To achieve the above objectives, this utility model employs an adjustable connector assembly, comprising:

[0006] The connecting seat has a cylindrical cavity inside, and the left and right ends of the cylindrical cavity are machined with internal threads in opposite directions. The side wall of the connecting seat has an oil nozzle mounting hole and a screw plug mounting hole that communicate with the cylindrical cavity, and an oil nozzle and a screw plug are respectively installed.

[0007] The screw assembly includes a left screw and a right screw installed at the left and right ends of a cylindrical cavity. One end of each screw is an assembly end, and the other end is a threaded end. A spherical bearing for multi-angle adaptation is installed in the assembly end, and the spherical bearing is axially limited by a retaining ring. The left end of the connecting seat has a positioning pin hole that passes through the connecting seat and communicates with the cylindrical cavity. The positioning pin passes through the positioning pin hole and abuts against the left screw to limit the relative rotation between the left screw and the connecting seat. A cotter pin is installed at the end of the positioning pin.

[0008] Two adjustment blocks are symmetrically installed on the upper and lower outer walls of the connecting seat. Each adjustment block has a through hole in the middle for a tool. By passing the tool through the through hole and applying torque, the connecting seat is driven to rotate around its own axis. The overall length of the connecting seat assembly is adjusted by the threaded transmission between the connecting seat and the left and right screws.

[0009] As an improvement, the threaded end of the left screw is provided with a flattened portion, and the locating pin passes through the locating pin hole and abuts against the flattened portion of the left screw.

[0010] As an improvement, the nozzle mounting hole is provided in two places, located on the side wall of the connector; the screw plug mounting hole is provided in one place, located at the bottom of the connector.

[0011] As an improvement, an annular protective ring is welded and fixed to each oil nozzle mounting position on the connecting seat.

[0012] As an improvement, the protective ring is arranged coaxially with the nozzle, and the height of the protective ring is higher than the exposed end of the nozzle.

[0013] As an improvement, the inner walls of the assembly cavities at the assembly ends of the left and right screws are provided with annular oil grooves. The annular oil grooves surround the outer side of the outer ring of the spherical bearing, and the side walls of the assembly cavities are provided with screw oil passages. One end of the screw oil passages is connected to the annular oil grooves, and the other end extends to the outer side of the screw to form an oil inlet.

[0014] An oil nozzle is threaded onto the oil inlet, and lubricating oil is injected into the annular oil groove through the oil nozzle and the screw oil passage to lubricate the spherical bearing.

[0015] As an improvement, the adjusting block is welded and fixed to the outer wall of the connecting seat.

[0016] As an improvement, the connecting seat is provided with a lubricating oil passage that communicates with both the grease fitting hole and the screw plug hole. When lubricating oil is injected into the connecting seat through the grease fitting, the lubricating oil fills the gap inside the cylindrical cavity along the lubricating oil passage until it overflows from the screw plug, which is used to determine that the lubricating oil is fully filled.

[0017] In a second aspect, this utility model also provides a bulldozer, including a cutter head and a U-shaped frame, wherein the adjustable connecting seat assembly is detachably installed between the cutter head and the U-shaped frame;

[0018] The assembly end of the left screw is rotatably connected to the cutter head via a spherical bearing, and the assembly end of the right screw is rotatably connected to the U-shaped frame via a spherical bearing. By adjusting the overall length of the adjustable connecting seat assembly, the angle of the cutter head relative to the U-shaped frame can be changed, thereby adjusting the bulldozer's entry angle.

[0019] Compared with the prior art, the adjustable connector assembly of this utility model has the following advantages:

[0020] (1) Strong multi-angle adaptability, suitable for the operation requirements of bulldozer universal shovel. The assembly ends of the left and right screws are equipped with spherical bearings, and axial positioning is achieved by retaining rings. This structure allows the connecting seat assembly to adapt to the posture adjustment of the bulldozer universal shovel in different operating scenarios (such as blade tilting and flipping) through the multi-angle rotation characteristics of the spherical bearings when transmitting force between the cutter head and the U-shaped frame. This avoids the dead angle of operation caused by the angle limitation of the traditional fixed connection structure and improves the adaptability of the equipment to complex working conditions.

[0021] (2) The length adjustment is convenient and efficient, and can be flexibly adapted to the soil entry angle requirements. The internal threads of the cylindrical cavity of the connecting seat are turned in opposite directions on the left and right ends, and are equipped with symmetrical adjustment blocks with through holes. During operation, only a tool needs to be inserted through the through hole of the adjustment block to apply torque, which can drive the connecting seat to rotate around its own axis. Through the reverse thread transmission, the left and right screws are driven to move closer or further away synchronously, realizing the rapid adjustment of the overall length. The relative distance between the cutter head and the U-shaped frame can be changed without disassembling the parts, thereby flexibly adjusting the soil entry angle of the bulldozer blade, adapting to different working media such as loose soil and dense gravel, and effectively improving the working efficiency.

[0022] (3) High structural stability, preventing loosening after adjustment. The connecting seat is connected to the left screw by a positioning pin, and the end of the positioning pin is prevented from falling off by a cotter pin. This double limiting structure can effectively limit the relative circumferential rotation of the left screw and the connecting seat after the length adjustment is completed, preventing the threaded fit from loosening due to vibration during bulldozer operation, ensuring the overall length is stable, thereby ensuring a constant blade entry angle and reducing operational errors and equipment wear caused by structural loosening.

[0023] (4) Convenient lubrication and maintenance, extending component service life. The side wall of the connector has an oil nozzle mounting hole and a screw plug mounting hole communicating with the cylindrical cavity, for installing the oil nozzle and screw plug respectively. During routine maintenance, lubricating oil can be directly injected into the cylindrical cavity and threaded joints through the oil nozzle without disassembling the assembly; at the same time, the screw plug provides visual feedback on the lubricating oil filling status (if lubricating oil overflows, it indicates full filling), ensuring sufficient lubrication coverage, reducing thread wear between the left and right screws and the connector, as well as rotational friction loss of the spherical bearing, significantly extending the overall service life of the assembly.

[0024] (5) The overall structure is simple and the assembly and maintenance costs are low. The core components include only basic parts such as connecting seats, screw assemblies, adjusting blocks and positioning pins. The connection methods of each part (threaded engagement, retaining ring snap-fit, cotter pin limit) are all mature and easy-to-operate assembly structures, which are convenient for production and on-site installation. At the same time, the detachable positioning pins, cotter pins and other parts make it easier to replace parts during later maintenance, reduce equipment downtime and reduce operation and maintenance costs. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 This is an exploded view of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the left screw of this utility model;

[0029] Figure 4 This is a schematic diagram of the assembly structure of this utility model;

[0030] In the diagram: 1. Retaining ring, 2. Spherical bearing, 3. Left screw, 3-1. Screw oil passage, 3-2. Flattening part, 4. Oil nozzle, 5. Connecting seat, 6. Screw plug, 7. Right screw, 8. Locating pin, 9. Cotter pin, 10. Adjusting block, 11. Protective ring, 12. Cutting head, 13. U-shaped bracket. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this application will be described in detail below through specific embodiments. It should be understood that the embodiments of this application and the specific features in the embodiments are detailed descriptions of the technical solutions of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0032] In the description of this utility model, it should be understood that the terms "front", "rear", "left", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this utility model and to simplify 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 limiting the scope of protection of this utility model.

[0033] like Figures 1-4 As shown, an adjustable connector assembly includes a connector 5, a screw assembly, and two adjusting blocks 10.

[0034] The connecting seat 5 has a cylindrical cavity axially formed inside. The inner walls of the left and right ends of the cylindrical cavity are respectively machined with internal threads, and the internal threads of the left and right ends rotate in opposite directions to realize the synchronous extension and retraction adjustment of the screw assembly. The side wall of the connecting seat 5 has an oil nozzle mounting hole and a screw plug mounting hole that communicate with the inside of the cylindrical cavity. An oil nozzle 4 is installed in the oil nozzle mounting hole and a screw plug 6 is installed in the screw plug mounting hole, which are used for lubricating oil injection and filling status judgment, respectively.

[0035] The screw assembly includes a left screw 3 and a right screw 7. One end of the left screw 3 is a threaded end, and the other end is an assembly end. The structure of the right screw 7 is the same as that of the left screw 3. The threaded end of the left screw 3 is machined with an external thread on its outer circumference, which is adapted to engage with the internal thread on the left end of the cylindrical cavity. The threaded end of the right screw 7 is machined with an external thread on its outer circumference, which is adapted to engage with the internal thread on the right end of the cylindrical cavity. Both the left and right screws have assembly cavities at their assembly ends, and a spherical bearing 2 is installed in the assembly cavity to achieve multi-angle rotation adaptation (adapting to the multi-angle operation requirements of a bulldozer shovel). Furthermore, the outer side of each spherical bearing 2 is engaged with the inner wall of the assembly cavity by a retaining ring 1 to achieve axial positioning and prevent the spherical bearing 2 from coming out of the assembly cavity; a locating pin hole is provided on the left side wall of the connecting seat 5, which is radially penetrating and communicating with the cylindrical cavity. After the locating pin 8 passes through the locating pin hole with a gap, its middle part abuts against the outer peripheral wall of the left screw 3 to restrict the relative circumferential rotation between the left screw 3 and the connecting seat 5; a pin hole is provided at the end of the locating pin 8, and a cotter pin 9 is installed in the pin hole to prevent the locating pin 8 from falling out of the locating pin hole;

[0036] Two adjustment blocks 10 are symmetrically installed on the upper and lower outer walls of the connecting seat 5 (symmetrical about the axis of the connecting seat 5). Each adjustment block 10 has a through hole in the middle for use with a wrench or a pin-type tool. During operation, by passing a tool through the through hole and applying circumferential torque, the connecting seat 5 can be driven to rotate around its own axis. Through the reverse thread transmission between the connecting seat 5 and the left and right screws, the left and right screws are driven to move synchronously closer or further away along the axial direction of the cylindrical cavity, thereby adjusting the overall length of the connecting seat assembly to adapt to the entry angle requirements of the bulldozer under different working conditions.

[0037] In some embodiments, such as Figure 3 As shown, the outer peripheral wall of the threaded end of the left screw 3 is provided with a planar flattened part 3-2, and the extension direction of the flattened part 3-2 is parallel to the axis of the left screw 3; after the positioning pin 8 passes through the positioning pin hole, its middle part is in close contact with the plane of the flattened part 3-2 to form a surface contact limit, which is more stable than the point contact limit and avoids the left screw 3 from circumferential displacement due to vibration.

[0038] In some embodiments, such as Figure 1 , Figure 2As shown, there are two oil nozzle mounting holes, which are symmetrically distributed on the side wall of the cylindrical cavity on the same side, allowing lubricating oil to be injected simultaneously from two points, thus improving filling efficiency; there is one screw plug mounting hole, which is located at the bottom center of the connecting seat 5 and communicates with the middle area of ​​the cylindrical cavity, making it easy to visually observe the lubricating oil overflow status.

[0039] In some embodiments, such as Figure 1 , Figure 2 As shown, an annular protective ring 11 is welded and fixed to each oil nozzle 4 at the installation position on the connecting seat 5. This protective ring 11 is used to prevent material from directly impacting the oil nozzle 4 and causing damage during bulldozing operations, making it suitable for complex operating environments such as mines and infrastructure projects. Furthermore, the protective ring 11 is coaxially arranged with the oil nozzle 4, and the height of the protective ring 11 is higher than the height of the end of the oil nozzle 4 exposed on the outside of the connecting seat 5, ensuring that the protective ring 11 preferentially contacts the material, forming an effective protective barrier.

[0040] In some embodiments, such as Figures 1-3 As shown, annular oil grooves are provided on the inner walls of the assembly cavities at the assembly ends of the left screw 3 and the right screw 7. The annular oil grooves surround the outer side of the outer ring of the spherical bearing 2 and fit against the outer ring wall, so that the lubricating oil can evenly cover the outer ring of the spherical bearing 2. A screw oil passage 3-1 is provided radially on the side wall of the assembly cavity. One end of the screw oil passage 3-1 is connected to the annular oil groove, and the other end extends to the outer side of the screw to form an oil inlet.

[0041] The oil inlet is fitted with an oil nozzle 4 via a threaded connection. Lubricating oil can be injected into the annular oil groove through the oil nozzle 4 and the screw oil passage 3-1 in sequence to lubricate the spherical bearing 2, reduce friction loss during multi-angle rotation, and extend the service life of the component.

[0042] In some embodiments, such as Figure 1 , Figure 2 As shown, the adjusting block 10 is fully welded to the outer wall of the connecting seat 5 to ensure that the adjusting block 10 does not loosen or deform when the tool applies torque, thus meeting the high-strength torque requirements of the bulldozer during operation.

[0043] In some embodiments, the interior of the connecting seat 5 is provided with a lubricating oil passage that communicates with both the grease fitting hole and the screw plug fitting hole. This lubricating oil passage can guide lubricating oil to fill the gap between the cylindrical cavity and the threaded ends of the left and right screws, thereby achieving lubrication and rust prevention at the threaded joint. When lubricating oil (grease) is injected into the interior of the connecting seat 5 through the grease fitting 4 on the connecting seat 5, the lubricating oil can flow along the lubricating oil passage until it overflows from the joint between the screw plug 6 and the screw plug fitting hole, so as to determine that the lubricating oil is fully filled and avoid over-lubrication or under-lubrication.

[0044] A second aspect of this utility model also provides a bulldozer, such as Figure 4As shown, it includes a cutter head 12 and a U-shaped frame 13. The adjustable connecting seat assembly is detachably installed between the cutter head 12 and the U-shaped frame 13 by bolts. The detachable structure facilitates later maintenance and component replacement.

[0045] The mounting end of the left screw 3 is rotatably adapted to the connecting lug of the cutter head 12 via the spherical bearing 2, and the mounting end of the right screw 7 is rotatably adapted to the connecting lug of the U-shaped frame 13 via the spherical bearing 2. With the help of the multi-angle rotation characteristics of the spherical bearing 2, the flexible posture adjustment of the cutter head 12 relative to the U-shaped frame 13 can be realized, which perfectly adapts to the multi-angle operation requirements of the bulldozer universal blade in scenarios such as site leveling and earthmoving, and avoids the problem of limited operating angle caused by traditional rigid connection.

[0046] When it is necessary to adapt to different working media (such as soft soil, dense sand and gravel, hard rock and ore), the connecting seat 5 can be driven to rotate around its own axis by inserting a tool through the through hole of the adjusting block 10 and applying torque. By using the reverse thread transmission between the connecting seat 5 and the left and right screws, the overall length of the connecting seat assembly can be adjusted, thereby changing the tilt angle of the cutter head 12 relative to the U-shaped frame 13, and finally completing the precise adjustment of the bulldozer's entry angle. For example, when facing soft soil, the entry angle is reduced to avoid the blade getting stuck, and when facing hard rock and ore, the entry angle is increased to improve the cutting ability, which significantly improves the bulldozer's operating efficiency and adaptability under different working conditions.

[0047] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An adjustable connector assembly, characterized in that, include: The connecting seat has a cylindrical cavity inside, and the left and right ends of the cylindrical cavity are machined with internal threads in opposite directions. The side wall of the connecting seat has an oil nozzle mounting hole and a screw plug mounting hole that communicate with the cylindrical cavity, and an oil nozzle and a screw plug are respectively installed. The screw assembly includes a left screw and a right screw installed at the left and right ends of a cylindrical cavity. One end of each screw is an assembly end, and the other end is a threaded end. A spherical bearing for multi-angle adaptation is installed in the assembly end, and the spherical bearing is axially limited by a retaining ring. The left end of the connecting seat has a positioning pin hole that passes through the connecting seat and communicates with the cylindrical cavity. The positioning pin passes through the positioning pin hole and abuts against the left screw to limit the relative rotation between the left screw and the connecting seat. A cotter pin is installed at the end of the positioning pin. Two adjustment blocks are symmetrically installed on the upper and lower outer walls of the connecting seat. Each adjustment block has a through hole in the middle for a tool. By passing the tool through the through hole and applying torque, the connecting seat is driven to rotate around its own axis. The overall length of the connecting seat assembly is adjusted by the threaded transmission between the connecting seat and the left and right screws.

2. The adjustable connector assembly according to claim 1, characterized in that, The threaded end of the left screw is provided with a flattened part, and the positioning pin passes through the positioning pin hole and abuts against the flattened part of the left screw.

3. The adjustable connector assembly according to claim 1, characterized in that, The nozzle mounting hole is provided in two places, located on the side wall of the connector; the screw plug mounting hole is provided in one place, located at the bottom of the connector.

4. The adjustable connector assembly according to claim 3, characterized in that, An annular protective ring is welded and fixed to each oil nozzle installation position on the connecting seat.

5. An adjustable connector assembly according to claim 4, characterized in that, The protective ring is arranged coaxially with the nozzle, and the height of the protective ring is higher than the exposed end of the nozzle.

6. The adjustable connector assembly according to claim 1, characterized in that, The inner walls of the assembly cavities at the assembly ends of the left and right screws are provided with annular oil grooves. The annular oil grooves surround the outer ring of the spherical bearing, and the side walls of the assembly cavities are provided with screw oil passages. One end of the screw oil passages is connected to the annular oil grooves, and the other end extends to the outer side of the screw to form an oil inlet. An oil nozzle is threaded onto the oil inlet, and lubricating oil is injected into the annular oil groove through the oil nozzle and the screw oil passage to lubricate the spherical bearing.

7. An adjustable connector assembly according to claim 1, characterized in that, The adjusting block is welded and fixed to the outer wall of the connecting seat.

8. An adjustable connector assembly according to claim 1, characterized in that, The connector has a lubricating oil passage inside that is connected to both the grease fitting hole and the screw plug hole. When lubricating oil is injected into the connector through the grease fitting, the lubricating oil fills the gap inside the cylindrical cavity along the lubricating oil passage until it overflows from the screw plug, which is used to determine that the lubricating oil is fully filled.

9. A bulldozer, comprising a cutter head and a U-shaped frame, characterized in that, The adjustable connecting seat assembly according to any one of claims 1-8 is detachably installed between the cutter head and the U-shaped frame; The assembly end of the left screw is rotatably connected to the cutter head via a spherical bearing, and the assembly end of the right screw is rotatably connected to the U-shaped frame via a spherical bearing. By adjusting the overall length of the adjustable connecting seat assembly, the angle of the cutter head relative to the U-shaped frame can be changed, thereby adjusting the bulldozer's entry angle.

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