A tensioning mechanism and agricultural machinery having the same

Abstract

The present invention relates to a tensioning mechanism and an agricultural machinery having the tensioning mechanism, the tensioning mechanism comprising a shaft tube, both ends of which are mounted on a bearing seat; a pulley, which is sealed and sleeved outside the shaft tube; and a water tank, which is connected to one end of the shaft tube through a pipe fitting; a water outlet is arranged on the shaft tube between the shaft tube and the pulley, and a nozzle is arranged on the pulley between the shaft tube and the pulley. The tensioning mechanism provided by the present invention integrates a watering system, which can lubricate the shaft tube and the pulley, and between the pulley and the belt, thereby reducing friction. The agricultural machinery provided by the present invention comprises the above-mentioned tensioning mechanism, which reduces the loss of parts of the whole machine, prolongs the service life of the whole machine, and improves the reliability and working efficiency of the whole machine.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural machinery, and in particular to a tensioning mechanism and an agricultural machinery having the tensioning mechanism. Background Art

[0002] At present, the level of agricultural mechanization in my country is getting higher and higher, and the application of agricultural machinery and equipment is becoming more and more extensive. Agricultural machinery such as rice seedling throwers often use tensioning mechanisms. Most of the existing tensioning mechanisms are split structures, which are composed of multiple pulleys and are formed in the form of matching with shafts. There are the following defects: ① The tensioning force of the tensioning mechanism cannot be adjusted when it is installed, and the tensioning force in the working state and the shutdown state does not change; ② The number of parts that make up the tensioning mechanism is large and the structure is complex; ③ The reliability is poor, the tensioning parts are more worn, the service life is short, and failures occur frequently, causing the machine to often fail to work normally, resulting in reduced production efficiency. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a tensioning mechanism in view of the above-mentioned shortcomings.

[0004] The present invention is achieved through the following technical solutions:

[0005] A tensioning mechanism, comprising:

[0006] Axle tube, with both ends mounted on the bearing seats;

[0007] A pulley, which is sealed and sleeved outside the shaft tube; and

[0008] A water tank connected to one end of the shaft tube through a pipe fitting;

[0009] A water outlet is arranged on the shaft tube between the shaft tube and the belt pulley, and a nozzle is arranged on the belt pulley between the shaft tube and the belt pulley.

[0010] Furthermore, the tensioning mechanism further comprises:

[0011] a first bracket, the bearing seat being fixed to the first bracket; and

[0012] A spring has one end connected to the first bracket and the other end adjustably connected to the second bracket.

[0013] Furthermore, in the tensioning mechanism, the pipe fitting is sleeved into one end of the shaft tube through a first sealing plug; the first sealing plug is fixedly connected to the shaft tube, and at least one sealing ring is provided between the first sealing plug and the pipe fitting.

[0014] Furthermore, in the tensioning mechanism, a water groove is provided between the pulley and the shaft tube on the pulley.

[0015] Furthermore, in the tensioning mechanism, the nozzle includes a main body portion, a sealing portion extending vertically outward along one end of the main body portion, and a supporting portion extending along the periphery of the sealing portion in a direction opposite to the main body portion.

[0016] Furthermore, in the tensioning mechanism, the main body extends out of the opening on the pulley, the supporting portion is supported on the outside of the shaft tube, and the sealing portion stops at the inner side of the water channel around the opening.

[0017] Furthermore, in the tensioning mechanism, the diameter of the main body portion is smaller than the diameter of the opening, and the diameter of the sealing portion is larger than the diameter of the opening.

[0018] Furthermore, in the tensioning mechanism, the other end of the shaft tube is sealed by a second sealing plug.

[0019] Furthermore, in the tensioning mechanism, a first sealing ring is provided between the inner diameter of the pulley and the outer diameters of both ends of the shaft tube (1).

[0020] Furthermore, in the tensioning mechanism, the sealing rings arranged between the first sealing plug and the pipe fitting are a first O-ring, a Y-ring and a second O-ring in sequence.

[0021] An agricultural machine comprises the tensioning mechanism described in any one of the above items.

[0022] The advantages and effects of the present invention are:

[0023] 1. The tensioning mechanism provided by the present invention realizes the function that the tensioning force becomes larger during operation and becomes smaller in the shutdown state, solves the influence of plastic deformation caused by long-term tensioning of the belt, reduces the wear of tensioning parts such as pulleys and belts, prolongs the life of the belt, and improves the reliability of the operation process.

[0024] 2. The tensioning mechanism provided by the present invention adopts an integral pulley, which has a simple structure, is easy to install and maintain, and is suitable for mass production.

[0025] 3. The tensioning mechanism provided by the present invention includes a water tank, which integrates a watering system, and can lubricate the shaft tube and the pulley, and between the pulley and the belt, thereby reducing friction and wear. Specifically, when the tensioning mechanism is applied to agricultural machinery, it can lubricate the belt, thus solving the problem of belt jumping caused by dry belt.

[0026] 4. The agricultural machinery provided by the present invention includes the above-mentioned tensioning mechanism, and the wear of each component in the tensioning mechanism is relatively low, which reduces the loss of parts of the whole machine, prolongs the service life of the whole machine, and at the same time improves the reliability and working efficiency of the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic structural diagram of a tensioning mechanism provided by an embodiment of the present invention is shown;

[0028] Figure 2 Show Figure 1 Middle A-direction view;

[0029] Figure 3 Show Figure 1 Middle I is a partial enlarged cross-sectional view;

[0030] Figure 4 A schematic diagram showing the connection between the shaft tube and the pulley in an embodiment of the present invention is shown;

[0031] Figure 5 A schematic diagram showing the operation of the nozzle in an embodiment of the present invention is shown;

[0032] Figure 6 A schematic diagram showing the change in tensioning force of the tensioning mechanism in a working state provided by an embodiment of the present invention is shown.

[0033] Explanation of the accompanying drawings: 1-shaft tube, 101-water outlet, 2-pulley, 21-water trough, 3-first sealing ring, 4-nozzle, 41-main part, 42-sealing part, 43-support part, 5-bearing seat, 6-water tank, 7-first bracket, 8-second bracket, 9-third bracket, 10-spring, 11-first sealing plug, 12-first O-ring, 13-Y-ring, 14-second O-ring, 15-pipe fitting, 16-second sealing plug, 17-jointed bolt, 18-belt. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the implementation of the present invention clearer, the technical scheme in the embodiment of the present invention is described in more detail below in conjunction with the drawings in the embodiment of the present invention. The described embodiment is a part of the embodiment of the present invention, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present invention, and should not be understood as limitations on the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention. The embodiments of the present invention are described in detail below in conjunction with the drawings:

[0035] In the description of the present invention, it should be understood that, unless otherwise specified, "multiple" means two or more than two; the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0036] Figures 1 to 3 The structure diagram of the tensioning mechanism provided by the embodiment of the present invention is shown. The tensioning mechanism is used in agricultural machinery and equipment such as rice seedling throwing machines with round belts to play a role in lubrication and tensioning. The tensioning mechanism includes a shaft tube 1, a pulley 2, a water tank 6 and a spring 10. The pulley 2 is sealed and sleeved outside the shaft tube 1. That is, a first sealing ring 3 is respectively provided between the inner diameter of the pulley 2 and the outer diameters of both ends of the shaft tube 1. Specifically, as shown in FIG. Figure 4 As shown, the pulley 2 is an integrated pulley group having multiple pulley grooves and pulley edges, and is an integral structure including multiple single pulleys. The pulley 2 adopts an integral structure, which can reduce the number of parts and the installation workload, and at the same time avoid the hidden danger of water leakage when multiple pulleys are used. The two ends of the shaft tube 1 are respectively installed on two bearing seats 5, and the two bearing seats 5 are respectively fixed on two first brackets 7. One end of the spring 10 is connected to the first bracket 7, and the other end is adjustably connected to the second bracket 8 to adjust the size of the tensioning force. Preferably, the spring 10 is connected to the second bracket 8 by a movable bolt 17, and the size of the tensioning force during installation is achieved by adjusting the movable bolt 17. Specifically, as Figure 1, when the mounting nut position of the eyebolt 17 is closer to the circular hole on the eyebolt 17 connected to the spring 10, the pulling force of the spring 10 increases, and the tensioning force increases; otherwise, it decreases. When the belt is too soft, it can be tightened by adjusting the eyebolt 17, and when the tensioning force is too large, it can be loosened by adjusting the eyebolt 17. The water tank 6 is connected to the shaft tube 1. Specifically, the water tank 6 is connected to one end of the shaft tube 1 through the pipe 15, and the other end of the shaft tube 1 is sealed by the second sealing plug 16, and the water in the water tank 6 flows into the shaft tube 1 through the pipe 15. The second sealing plug 16 is preferably made of rubber material, or it can be a material that can play a sealing role, such as plastic, metal, etc. The water tank 6 is installed on the first bracket 7 at one end of the shaft tube 1 through the third bracket 9, that is, the water tank 6 and a bearing seat 5 are installed on the same first bracket 7. During the working process, the water tank 6 and the bearing seat 5 do not move relative to each other, simplifying the mechanism and achieving sealing during the movement. The first bracket 7 and the second bracket 8 are fixed to the frame structure and can be fixed by welding. A water outlet 101 is provided on the shaft tube 1 in the area between the shaft tube 1 and the pulley 2. Specifically, the water outlet 101 is provided between the two first sealing rings 3, so that water flows through the shaft tube 1 to between the shaft tube 1 and the pulley 2. A nozzle 4 is provided on the pulley 2 in the area between the shaft tube 1 and the pulley 2, so that water flows through the wall of the pulley 2 to the belt to play a lubricating role. Specifically, the position of the nozzle 4 corresponds to the belt passing through, so that the belt is pressed onto the nozzle 4 to discharge water, solving the problem of the belt drying and easy to jump.

[0037] like Figure 3 As shown, the pipe fitting 15 is sleeved in one end of the shaft tube 1 through the first sealing plug 11. Specifically, the cross-section of the first sealing plug 11 is annular, and its outer wall abuts against the inner wall of the shaft tube 1, and its inner wall abuts against the outer wall of the pipe fitting 15. The first sealing plug 11 is fixedly connected to the shaft tube 1, and specifically, the first sealing plug 11 and the shaft tube 1 are connected by threads, and are coated with sealant without relative movement. At least one sealing ring is arranged between the first sealing plug 11 and the pipe fitting 15 to realize dynamic sealing. When the tensioning mechanism is working, the belt 18 drives the pulley 2 to rotate, and the pulley 2 drives the shaft tube 1 and the first sealing plug 11 to rotate, and the pipe fitting 15 does not rotate, and the first sealing plug 11 rotates relative to the pipe fitting 15 and seals. Specifically, there is at least one sealing ring, and in this embodiment, there are three sealing rings, namely, the first O-ring 12, the Y-ring 13, and the second O-ring 14. The multi-layer sealing effect is better. In addition, the Y-ring 13 and the O-ring 12 complement each other, and the sealing is more reliable. Open grooves are set on the first sealing plug 11 at positions corresponding to each sealing ring. The first O-ring 12, the Y-ring 13, and the second O-ring 14 cooperate with the open grooves. When the first sealing plug 11 rotates with the pulley 2, the pipe 15 is stationary, and the two realize dynamic sealing through the first O-ring 12, the Y-ring 13, and the second O-ring 14. Figure 6As shown, when the belt 18 moves to the right, a counterclockwise friction force f is generated on the pulley 4, and the first O-ring 12, the Y-ring 13 and the second O-ring 14 generate friction forces in the opposite direction. The greater the friction forces in the opposite direction, the greater the friction force F of the belt relative to the pulley, causing the tensioning mechanism to generate a clockwise torque relative to the rotation center O, thereby increasing the tensioning force, that is, in the working state, the tensioning force increases with the increase of the speed of the pulley.

[0038] Figure 4 A schematic diagram of the connection between the shaft tube and the pulley in the embodiment of the present invention is shown. A water channel 21 is arranged between the inner side of the pulley 2 and the shaft tube 1, and the water outlet 101, the nozzle 4, and the water channel 21 are connected, that is, the water in the water tank 6 flows into the water channel 21 through the shaft tube 1 through the water outlet 101 (the direction of the arrow shows the direction of the water flow), and then sprayed out through the nozzle 4.

[0039] Figure 5 The schematic diagram of the nozzle in the embodiment of the present invention is shown. The nozzle 4 includes a main body 41, a sealing portion 42 extending vertically outward from one end of the main body 41, and a support portion 43 extending in the opposite direction of the main body 41 along the periphery of the sealing portion 42. The main body 41 extends out of the opening on the pulley 2, and the position of the opening corresponds to the belt passing through. In cooperation with the nozzle, the support portion 43 is supported on the outside of the shaft tube 1, and the sealing portion 42 is stopped on the inside of the water groove 21 around the opening. Specifically, the position of the opening nozzle corresponds to the belt passing through, so that the belt can be pressed onto the nozzle to discharge water. The length of the main body 41 extending out of the opening is to ensure that the water can be pressed out without exceeding the height of the support portion 43, so as to ensure that the contact between the belt and the pulley 2 is not interfered, so as to achieve the tensioning effect of the pulley 2 on the belt. The diameter of the main body 41 is smaller than the diameter of the opening, and the diameter of the sealing portion 42 is larger than the diameter of the opening. After the water fills the water groove 21 through the water outlet 101, it reaches the vicinity of the nozzle 4. A plurality of nozzles are arranged on the pulley 2, and are evenly distributed. The nozzle 4 is usually in a closed state; during operation, the belt 18 drives the pulley 2 to rotate, the belt 18 squeezes the top of the main part 41 of the nozzle 4, the support part 43 is elastically deformed, the main part 41 pushes the sealing part 42 away from the inner side of the water groove 21 of the pulley 2, the seal is released, and water is spilled from the matching hole of the nozzle 4 (the opening on the pulley 2) to lubricate the belt 18, thereby reducing the belt from jumping out. Specifically, the main part 41, the sealing part 42 and the support part 43 of the nozzle 4 can be integrally formed, and the nozzle 4 is made of a material that is elastic and can rebound and reset, and can be sealed after resetting, such as rubber, special engineering plastics, etc.

[0040] The water tank in the tensioning mechanism is connected to the shaft tube, and water is sprayed directly from the pulley, integrating an integrated watering function. The watering system and the tensioning mechanism are integrated in structure and function, avoiding the use of separate watering systems and tensioning mechanisms, and there is no need to set up multiple waterways, use multiple spray mechanisms, multiple pipes, multiple fixing components, etc. The structure is relatively simple and easy to maintain.

[0041] In another embodiment provided by the present invention, the agricultural machine includes the above-mentioned tensioning mechanism, which is fixed to the frame structure of the whole machine through the first bracket 7 and the second bracket 8, and can be fixed by welding. The wear of each component in the tensioning mechanism is low, which reduces the loss of parts of the whole machine, prolongs the service life of the whole machine, and improves the reliability and working efficiency of the whole machine.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not used to limit the scope of implementation of the present invention. Any equivalent changes and modifications made within the protection scope of the present invention should be considered to fall within the protection scope of the present invention.

Claims

1. A tensioning mechanism, characterized in that: The tensioning mechanism comprises: The shaft tube (1) has two ends mounted on the bearing seat (5); A pulley (2) is sealingly sleeved outside the shaft tube (1); and A water tank (6) is connected to one end of the shaft tube (1) via a pipe fitting (15), and the pipe fitting (15) is sleeved into one end of the shaft tube (1) via a first sealing plug (11); A water trough (21) is arranged between the pulley (2) and the shaft tube (1); a water outlet (101) is arranged on the shaft tube (1) between the shaft tube (1) and the pulley (2); the water outlet (101) is communicated with the shaft tube (1) and the water trough (21) respectively; a nozzle (4) is arranged on the pulley (2) between the shaft tube (1) and the pulley (2); the arrangement position of the nozzle (4) corresponds to the belt (18); and the nozzle (4) is configured to spray water in the water trough (21) onto the belt (18).

2. The tensioning mechanism according to claim 1, characterized in that: The tensioning mechanism also includes: a first bracket (7), the bearing seat (5) being fixed to the first bracket (7); and A spring (10) has one end connected to the first bracket (7) and the other end adjustably connected to the second bracket (8).

3. A tensioning mechanism according to claim 1 or 2, characterized in that: The first sealing plug (11) is fixedly connected to the shaft tube (1), and at least one sealing ring is arranged between the first sealing plug (11) and the pipe member (15).

4. A tensioning mechanism according to claim 1 or 2, characterized in that: The nozzle (4) comprises a main body portion (41), a sealing portion (42) extending vertically outward from one end of the main body portion (41), and a supporting portion (43) extending along the periphery of the sealing portion (42) in a direction opposite to the main body portion (41).

5. A tensioning mechanism according to claim 4, characterized in that: The main body (41) extends out of the opening on the pulley (2), the support portion (43) is supported on the outside of the shaft tube (1), and the sealing portion (42) is stopped on the inside of the water channel (21) around the opening.

6. A tensioning mechanism according to claim 5, characterized in that: The diameter of the main body portion (41) is smaller than the diameter of the opening, and the diameter of the sealing portion (42) is larger than the diameter of the opening.

7. A tensioning mechanism according to claim 1 or 2, characterized in that: The other end of the shaft tube (1) is sealed by a second sealing plug (16).

8. A tensioning mechanism according to claim 1 or 2, characterized in that: A first sealing ring (3) is provided between the inner diameter of the pulley (2) and the outer diameters of the two ends of the shaft tube (1).

9. A tensioning mechanism according to claim 3, characterized in that: The sealing rings arranged between the first sealing plug (11) and the pipe fitting (15) are a first O-type sealing ring (12), a Y-type sealing ring (13) and a second O-type sealing ring (14) in sequence.

10. An agricultural machine, characterized in that: The agricultural machine comprises the tensioning mechanism according to any one of claims 1 to 9.

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