A belt pulley structure for a belt-driven tractor

Abstract

A belt-driven tractor pulley structure includes a tractor shaft, a tractor pulley, a clutch assembly, and a clutch release bearing. The tractor pulley is rotatably mounted on the tractor shaft using the bearing and is connected to the tractor engine via a belt. An inner groove for accommodating the clutch assembly is provided on the tractor pulley. The clutch assembly is detachably mounted in the groove using a connecting piece. The clutch release bearing is installed between the clutch assembly and the tractor gearbox, enabling synchronous or relative movement between the tractor pulley and the tractor shaft. For subsequent maintenance, only the connecting bolts need to be removed to replace or repair the clutch assembly. Maintenance is convenient, and worn pulleys or clutch components can be replaced individually. Furthermore, users do not need specialized equipment to complete the installation and adjustment.

Description

Technical Field

[0001] This utility model relates to the technical field of belt-driven tractor clutch structure, specifically a belt pulley structure for a belt-driven tractor. Background Technology

[0002] In agricultural production, belt-driven tractors are widely used in tillage, sowing, and harvesting operations due to their advantages such as low transmission costs and convenient maintenance. As the core component of tractor power transmission, the design of the pulley structure directly affects the tractor's power output efficiency, operational stability, and service life.

[0003] As attached Figure 1 As shown, in the structure of a traditional single-cylinder belt-driven wheel tractor, the pulley and clutch housing are a single unit, which, together with the internal pressure plate, driving plate, driven plate, clutch spring, clutch inner spring, release lever, bearing, pulley cover, adjusting screw, etc., constitutes the clutch assembly of the single-cylinder belt-driven wheel tractor. The structure is complex, and long-term use of the tractor can easily lead to wear on the belt groove of the housing. Replacing the entire housing is costly, and assembling and adjusting the clutch is very difficult without specialized equipment. Therefore, this utility model provides a pulley structure for a belt-driven tractor to solve the above-mentioned problems. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a pulley structure for a belt-driven tractor, solving the problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a belt pulley structure for a belt-driven tractor, comprising a tractor shaft, a tractor pulley, a clutch assembly, and a clutch release bearing. The tractor pulley is rotatably mounted on one shaft of the tractor using a bearing and is connected to the tractor engine via a belt. The inner side of the tractor pulley is provided with a mounting groove for accommodating the clutch assembly, and the clutch assembly is detachably mounted in the mounting groove using a connector. The clutch release bearing is installed between the clutch assembly and the tractor gearbox. By acting on the clutch assembly, it enables the smooth engagement and disengagement of the clutch, thereby achieving synchronous or relative movement between the tractor pulley and the tractor shaft.

[0006] Preferably, two bearings are provided between the tractor pulley and the tractor shaft, with the two bearings side by side and sleeved on the tractor shaft.

[0007] Preferably, a spacer is provided between the two bearings.

[0008] Preferably, the outer ring of the tractor pulley is fitted with a retaining ring, which abuts against the bottom of the inner bearing to fix the outer ring of the bearing on the tractor pulley, and the tractor shaft passes through the retaining ring.

[0009] Preferably, the clutch assembly includes a clutch housing, a clutch pressure plate, and a clutch friction plate. The clutch housing is fixedly installed in a mounting groove on one side of the tractor pulley using bolts. The clutch pressure plate and the clutch friction plate are installed inside the clutch housing, and the clutch pressure plate is fixedly connected to the clutch housing. The clutch friction plate is connected to the tractor shaft via a spline sleeve.

[0010] In addition, the clutch pressure plate is equipped with a release lever and a grinding plate spring. Under the action of the grinding plate spring, the release lever causes the clutch pressure plate to press against the clutch friction plate, so that the clutch is in the engaged state.

[0011] When the clutch is engaged, one side of the clutch friction plate is in contact with the side of the tractor pulley, and the other side is in contact with the clutch pressure plate, thereby achieving synchronous rotation, and the power on the tractor pulley is transmitted to the tractor shaft. When the clutch is depressed, the clutch release bearing presses against the clutch release lever, causing the clutch pressure plate to disengage from the clutch friction plate. This means that the surfaces of the clutch friction plate, the tractor pulley, and the clutch pressure plate are no longer in contact. At this point, the tractor pulley and the clutch pressure plate rotate synchronously (powered by the tractor engine transmitted to the tractor pulley via the belt), while the clutch friction plate, after disengaging from both, moves independently and synchronously with the tractor shaft.

[0012] Preferably, the end of one shaft of the tractor is provided with an external pulley for driving an air compressor, oil pump or other external equipment.

[0013] Preferably, the external pulley is fixedly installed at the end of one shaft of the tractor using a cotter nut, a cotter pin, and a flat washer.

[0014] Beneficial effects This utility model provides a pulley structure for a belt-driven tractor. Compared with the prior art, it has the following advantages: 1. The pulley structure of this belt-driven tractor adopts a new design that utilizes mature clutch assemblies from medium-duty tractors, harvesters, and automobiles. The clutch assembly and pulley are separated into two independent structures. The clutch assembly is directly embedded into the inner side of the tractor pulley using a connector, enabling rapid assembly. For subsequent maintenance, only the connecting bolts need to be removed to detach the clutch assembly from the pulley, making maintenance convenient. Worn pulleys or clutch components can be replaced individually, and users do not need specialized equipment to complete installation and adjustment, significantly reducing operating costs and greatly improving socio-economic benefits.

[0015] The belt pulley structure of this belt-driven tractor, by changing the clutch friction plate from an internal structure to an external structure, makes it easier to dissipate the heat generated by friction during clutch disengagement and engagement more quickly, thus improving the product's service life. Attached Figure Description

[0016] Figure 1 This is the clutch assembly for a traditional single-cylinder belt-driven wheeled tractor; Figure 2 This is a cross-sectional view of the overall structure of the present utility model; Figure 3 This is a schematic diagram of the clutch assembly. Figure 4 This is a schematic diagram of the side structure of the clutch pressure plate; Figure 5 This is a schematic diagram of the front structure of the clutch friction plate; Figure 6 This is a schematic diagram of the side structure of the clutch friction plate.

[0017] In the diagram: 1-Tractor shaft 1, 2-Tractor pulley, 3-Clutch assembly, 4-Bearing, 5-Spacer, 6-Retaining ring, 7-Connecting bolt, 8-Spring washer, 9-Clutch friction plate, 10-Clutch release bearing, 11-Clutch housing, 12-Clutch pressure plate, 13-Damper, 14-Spline, 15-Release lever, 16-External pulley, 17-Open nut. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-6This utility model provides a technical solution: a pulley structure for a belt-driven tractor, used in a single-cylinder belt-driven wheel tractor, which includes a tractor shaft 1, a tractor pulley 2, a clutch assembly 3, and a clutch release bearing 10. The tractor pulley is rotatably mounted on the tractor shaft 1 using a bearing 4, and is connected to the tractor engine via a belt. In other words, in a single-cylinder belt-driven wheel tractor, the tractor pulley receives power from the tractor engine and then transmits the power to other components.

[0020] The inner side of the tractor pulley 2 has a mounting groove for accommodating the clutch assembly 3. The clutch assembly 3 is detachably mounted in the mounting groove using a connecting piece. The clutch release bearing 10 is installed between the clutch assembly and the tractor gearbox. By acting on the clutch assembly, it achieves smooth engagement and disengagement of the clutch, thereby realizing synchronous or relative movement between the tractor pulley and the tractor shaft.

[0021] In this embodiment, to ensure the stability of the tractor pulley, two bearings 4 are provided between the tractor pulley and the tractor shaft, with the two bearings 4 arranged side by side and sleeved on the tractor shaft. It should be noted that the tractor in this application is a single-cylinder belt-driven pulley tractor; the inner diameter of the bearings is adapted to the outer diameter of the tractor shaft. Furthermore, a spacer 5 is provided between the two bearings 4. The spacer 5 can be sleeved on the outer surface of the tractor shaft 1, or it can be in contact with the surface of the shaft.

[0022] Meanwhile, a retaining ring 6 is embedded in the outer ring of the tractor pulley. The retaining ring abuts against the bottom of the inner bearing, which is used to fix the outer ring of the bearing onto the tractor pulley, and one shaft of the tractor passes through the retaining ring. The retaining ring 6 is a standard part, and a through hole is opened in the middle of the retaining ring 6. During the installation process, the two bearings 4 and the spacer 5 are installed on the bearing hole of the pulley and fixed with the retaining ring 6.

[0023] In this embodiment, the clutch assembly 3 adopts a disc-type structure, including a clutch housing 11, a clutch pressure plate 12, and a clutch friction plate 9. The clutch housing is fixedly installed in a mounting groove on one side of the tractor pulley using connecting bolts 7. The clutch pressure plate and the clutch friction plate are installed inside the clutch housing, and the clutch pressure plate is fixedly connected to the clutch housing. The clutch friction plate is connected to the tractor shaft via a spline sleeve and spline 14. Furthermore, a buffer 13 is provided between the clutch friction plate and the spline sleeve to increase stability. The connecting component also includes a spring washer 8 for increasing the pressure between the bolt and the surface of the clutch housing, and the spring washer is in contact with the surface of the clutch housing.

[0024] Additionally, an external pulley 16 for driving an air compressor, oil pump, or other external equipment is provided at the end of the tractor's first shaft. The external pulley is fixedly installed at the end of the tractor's first shaft using a cotter nut 17, a cotter pin, and a flat washer (not shown in the figure).

[0025] Generally, the clutch pressure plate 12 is provided with a release lever 15 and a grinding plate spring (not shown in the figure). Under the action of the grinding plate spring, the release lever causes the clutch pressure plate to abut against the clutch friction plate, so that the clutch is in the engaged state.

[0026] The work process is as follows: When the clutch is engaged, one side of the clutch friction plate is in contact with the side of the tractor pulley, and the other side is in contact with the tractor pulley, thereby achieving synchronous rotation. The power on the tractor pulley is transmitted to the tractor shaft, and the external pulley 16 rotates synchronously with the tractor shaft. When the clutch is depressed, the clutch release bearing presses against the clutch release lever, causing the clutch pressure plate to disengage from the clutch friction plate. This means that the surfaces of the clutch friction plate, the tractor pulley, and the clutch pressure plate are no longer in contact. At this point, the tractor pulley and the clutch pressure plate rotate synchronously (powered by the tractor engine transmitted to the tractor pulley via the belt), while the clutch friction plate, after disengaging from both, stops or moves inertial motion synchronously with the tractor shaft.

[0027] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A belt pulley structure for a belt-driven tractor, comprising a tractor shaft, a tractor pulley, a clutch assembly, and a clutch release bearing, characterized in that: The tractor pulley is rotatably mounted on one shaft of the tractor using a bearing and is connected to the tractor engine via a belt. The inner side of the tractor pulley is provided with a mounting groove for accommodating the clutch assembly, and the clutch assembly is detachably mounted in the mounting groove using a connector. The clutch release bearing is installed between the clutch assembly and the tractor gearbox. By acting on the clutch assembly, it enables the smooth engagement and disengagement of the clutch, thereby achieving synchronous or relative movement between the tractor pulley and the tractor shaft.

2. The pulley structure of a belt-driven tractor as described in claim 1, characterized in that: Two bearings are provided between the tractor pulley and the tractor shaft, with the two bearings side by side and sleeved on the tractor shaft.

3. The pulley structure of a belt-driven tractor as described in claim 2, characterized in that: A spacer is provided between the two bearings.

4. The pulley structure of a belt-driven tractor as described in claim 3, characterized in that: The outer ring of the tractor pulley is fitted with a retaining ring, which abuts against the bottom of the inner bearing to fix the outer ring of the bearing onto the tractor pulley.

5. The pulley structure of a belt-driven tractor as described in claim 1, characterized in that: The clutch assembly includes a clutch housing, a clutch pressure plate, and a clutch friction plate. The clutch housing is fixedly installed in a mounting groove on one side of the tractor pulley using bolts. The clutch pressure plate and the clutch friction plate are installed inside the clutch housing, and the clutch pressure plate is fixedly connected to the clutch housing. The clutch friction plate is connected to the tractor shaft via a spline sleeve.

6. The pulley structure of a belt-driven tractor as described in claim 1, characterized in that: The tractor's axle is equipped with an external pulley for driving an air compressor, oil pump, or other external equipment.

7. The pulley structure of a belt-driven tractor as described in claim 6, characterized in that: The external pulley is fixedly installed at the end of one shaft of the tractor using a cotter nut, a cotter pin, and a flat washer.

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