A tensioner mechanism and harvester

Abstract

The utility model provides a kind of tensioning wheel adjusting mechanism and harvester.A kind of tensioning wheel adjusting mechanism, comprising: baffle, nut, adjusting rod, mounting beam, tensioning wheel fixed seat and tensioning wheel assembly, the baffle and the tensioning wheel fixed seat are all installed on the mounting beam, the tensioning wheel assembly is slidably installed on the tensioning wheel fixed seat, the nut is adjacent the baffle, the nut is sleeved on adjusting rod, the adjusting rod is connected with the tensioning wheel assembly, when the adjusting rod moves axially, the tensioning wheel assembly is synchronously moved on the tensioning wheel fixed seat.Structure is simple and low in cost, can simplify the installation process of tensioning wheel, in addition, the tensioning force size can be adjusted within a certain range according to actual working condition.The installation difficulty in the installation process of wheat machine tensioning wheel and the problem that tensioning force size is difficult to adjust are solved.

Description

Technical Field

[0001] This utility model relates to the technical field of tension wheel adjustment equipment, and in particular to a tension wheel adjustment mechanism and a harvester. Background Technology

[0002] The rapid development and application of wheat harvesters have greatly promoted agricultural development. However, the widespread use of wheat harvesters has also intensified industry competition, with harvesters boasting higher overall performance, lower costs, and easier parts assembly and disassembly often capturing the majority of the market. Currently, the main transmission method for harvesters is belt drive, requiring a tensioning device to tighten the belt, thereby improving transmission smoothness and power transmission efficiency, and ultimately enhancing the harvester's performance. Therefore, optimizing the design of the belt tensioning device is of great significance.

[0003] Currently, the tensioning device for harvesting machinery belts is typically a tensioning pulley. There are two types of tensioning pulley structures based on whether or not they have a tie rod. One type is a direct-installation type without a tie rod. This type of tensioning pulley consists of a tensioning pulley assembly, a tensioning pulley bolt shaft, a nut, a toothed washer, and a tensioning pulley base. During assembly, the tensioning pulley assembly, bolt shaft, nut, and toothed washer are first assembled, and then fixed to the tensioning pulley base. The tensioning pulley is secured by the friction between the tensioning pulley mounting base and the toothed washer. The advantages of this structure are its simplicity and low cost. The disadvantages are that installation is difficult and the tension is hard to adjust.

[0004] Another type uses a tie rod to fix the tension wheel. This structure consists of a tension wheel assembly, a tension wheel bolt shaft, a tie rod, nuts, washers, a baffle, and a tension wheel base. The tie rod and the tension wheel bolt shaft are connected as one unit by welding. During assembly, first, the tie rod, tension wheel bolt shaft, and tension wheel assembly are installed onto the tension wheel mounting base. Then, the baffle is installed and secured with two nuts and washers. Finally, the nuts used to fix the tie rod are tightened. The tie rod is clamped and fixed to the baffle by two or more nuts, and the tension wheel can be tensioned by rotating the bolts on the corresponding sides. The advantage of this structure is that the tension force can be adjusted. The disadvantages are that the structure is relatively complex, the installation process is more complicated, and the cost is higher. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a tension wheel adjustment mechanism and a harvester, which addresses the shortcomings of the existing technology.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A tension wheel adjustment mechanism includes: a baffle, a nut, an adjusting rod, a mounting beam, a tension wheel fixing seat, and a tension wheel assembly. The baffle and the tension wheel fixing seat are both mounted on the mounting beam. The tension wheel assembly is slidably mounted on the tension wheel fixing seat. The nut is adjacent to the baffle and is sleeved on the adjusting rod. The adjusting rod is connected to the tension wheel assembly. When the adjusting rod moves axially, the tension wheel assembly moves synchronously on the tension wheel fixing seat.

[0007] The beneficial effects of adopting this utility model's technical solution are: simple structure and low cost, which simplifies the installation process of the tensioning wheel; furthermore, the tension force can be adjusted within a certain range according to actual working conditions. It solves the problems of installation difficulties and difficulty in adjusting the tension force during the installation of the tensioning wheel in wheat harvesters.

[0008] Furthermore, one end of the adjusting rod is provided with an abutment portion, and the tensioning wheel assembly is provided with a recessed portion that mates with the abutment portion, with the abutment portion and the recessed portion abutting against each other.

[0009] The beneficial effect of adopting the above-mentioned further technical solution is that the tensioner assembly is provided with a recessed portion for engaging with the abutment portion on the adjusting rod. The abutment portion of the adjusting rod abuts against the recessed portion of the tensioner assembly, thereby pushing the tensioner assembly through the adjusting rod.

[0010] Furthermore, the abutting part is a semi-circular head, the recessed part is a conical hole, and the semi-circular head abuts in the conical hole.

[0011] The beneficial effects of adopting the above-mentioned further technical solution are as follows: The tensioning wheel assembly is provided with a tapered hole for engaging the semi-circular head on the adjusting rod. The semi-circular head of the adjusting rod abuts against the tapered hole of the tensioning wheel assembly, thereby pushing the tensioning wheel assembly. The semi-circular head structure of the adjusting rod head prevents damage to the threads on the adjusting rod when pushing the tensioning wheel bolt shaft. When engaging with the tapered hole, assembly is easier, the spherical surface and tapered surface contact is better, and the fit is more flexible. The adjusting rod has only one nut, resulting in a simpler structure and easier installation.

[0012] Furthermore, the nut is located on the left side of the baffle, or the nut is located on the right side of the baffle.

[0013] The advantages of adopting the above-mentioned further technical solution are: there is only one nut on the adjusting rod, the structure is simpler, and the installation is more convenient. Changing the nut from the outside of the baffle to the inside of the baffle saves space.

[0014] Furthermore, the adjusting rod located between the baffle and the tensioning wheel assembly is a smooth rod.

[0015] The beneficial effect of adopting the above-mentioned further technical solution is that the thread at a certain range at the front end of the adjusting rod can be changed to a smooth rod, which can shorten the time required to rotate the adjusting rod during installation.

[0016] Furthermore, the tensioning wheel assembly is provided with a threaded through hole, and there are two nuts, which are located on both sides of the baffle. The two nuts abut against the baffle through washers. The threaded through hole, the two nuts, and the washers are all fitted onto the adjusting rod.

[0017] The beneficial effects of adopting the above-mentioned further technical solution are: the tapered hole on the tension wheel bolt shaft is changed to a threaded through hole, the nut is changed to a nut with a washer on each side of the baffle, and by lengthening the adjusting rod, push and pull can be integrated.

[0018] Furthermore, the tensioning wheel mounting base is provided with a circular hole for mounting the tensioning wheel assembly and a limiting stroke hole for sliding the tensioning wheel assembly. The circular hole communicates with the limiting stroke hole, and the tensioning wheel assembly is slidably mounted on the limiting stroke hole.

[0019] The beneficial effects of adopting the above-mentioned further technical solution are: the round hole is used to install the tensioner assembly; the limit stroke hole is used to cooperate with the movement of the tensioner assembly; and the installation and maintenance of the tensioner assembly are facilitated.

[0020] Furthermore, the tensioner assembly includes: a tensioner bolt shaft, a hexagonal flange nut, a flat washer, a pair of deep groove ball bearings, a spacer tube, a square washer, a bushing, and a tensioner for contacting the belt. One end of the tensioner bolt shaft is slidably mounted on the tensioner mounting base. The hexagonal flange nut, the flat washer, the square washer, and the bushing are all sleeved on the tensioner bolt shaft. The square washer is located at one end of the bushing, and the hexagonal flange nut and the flat washer are both located at the other end of the bushing. The flat washer is located between the hexagonal flange nut and the bushing. The pair of deep groove ball bearings and the spacer tube are both sleeved on the outside of the bushing. The spacer tube is located between the pair of deep groove ball bearings, and the tensioner is sleeved on the outside of the pair of deep groove ball bearings.

[0021] The beneficial effects of adopting the above-mentioned further technical solution are: simplified tensioner structure and reduced cost. A hexagonal flange nut is used for fixing and disassembling the tensioner assembly. A square washer is used to engage with the tensioner bolt shaft to clamp the tensioner fixing seat, thus securing the tensioner assembly. A pair of deep groove ball bearings are used to support the stable rotation of the tensioner, preventing it from wobbling and reducing friction. A spacer tube separates the pair of deep groove ball bearings. The outer side of the belt engages with the tensioner in the tensioner assembly; an interaction force exists between them, and the belt is tensioned by the thrust of the tensioner.

[0022] Furthermore, one end of the tension wheel bolt shaft is provided with a shaft head, and an elongated boss is provided near the shaft head of the tension wheel bolt shaft. The elongated boss is slidably mounted on the tension wheel fixing seat, and the tension wheel fixing seat is located between the shaft head and the square pad. A tapered hole is provided on the shaft head, and the adjusting rod is connected to the tapered hole, or one end of the tension wheel bolt shaft is provided with a threaded through hole.

[0023] The beneficial effects of adopting the above-mentioned further technical solution are: the elongated boss is used to cooperate with the tension wheel fixing seat. The semi-circular head of the adjusting rod abuts against the tapered hole at the shaft head of the tension wheel bolt shaft, and the tension wheel bolt shaft is pushed by rotating the adjusting rod, thereby pushing the tension wheel assembly.

[0024] In addition, this utility model also provides a harvester, including the tension wheel adjustment mechanism described above.

[0025] The beneficial effects of adopting this utility model's technical solution are: simple structure and low cost, which simplifies the installation process of the tensioning wheel; furthermore, the tension force can be adjusted within a certain range according to actual working conditions. It solves the problems of installation difficulties and difficulty in adjusting the tension force during the installation of the tensioning wheel in wheat harvesters.

[0026] The advantages of this invention in its additional aspects will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is one of the structural schematic diagrams of the tension wheel push rod mechanism provided in the embodiment of this utility model.

[0029] Figure 2 The second schematic diagram of the tension wheel push rod mechanism provided in this embodiment of the utility model.

[0030] Figure 3 The third schematic diagram of the tension wheel push rod mechanism provided in the embodiment of this utility model.

[0031] Figure 4 This is a schematic diagram of the tensioning wheel assembly provided in an embodiment of the present utility model.

[0032] Figure 5 The fourth schematic diagram of the tension wheel push rod mechanism provided in the embodiment of this utility model.

[0033] Figure 6 The fifth schematic diagram of the tension wheel push rod mechanism provided in the embodiment of this utility model.

[0034] Figure 7 The sixth schematic diagram of the tension wheel push rod mechanism provided in the embodiment of this utility model.

[0035] Explanation of reference numerals: 1. Baffle; 2. Nut; 3. Adjusting rod; 31. Semi-circular head; 32. Smooth rod; 4. Mounting beam; 5. Tensioner wheel fixing seat; 51. Round hole; 52. Limiting stroke hole; 6. Tensioner wheel assembly; 61. Tensioner wheel bolt shaft; 611. Tapered hole; 612. Threaded through hole; 613. Long strip boss; 62. Hexagonal flange nut; 63. Flat washer; 64. Deep groove ball bearing; 65. Interval tube; 66. Square washer; 67. Bushing; 68. Tensioner wheel; 7. Belt; 8. Gasket. Detailed Implementation

[0036] The principles and features of this utility model are described below with reference to the accompanying drawings. The embodiments described are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, 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, and therefore should not be construed as a limitation of this utility model.

[0041] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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; and they can refer to the internal connection of 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.

[0042] like Figures 1 to 7 As shown, this utility model embodiment provides a tension wheel adjustment mechanism, including: a baffle 1, a nut 2, an adjusting rod 3, a mounting beam 4, a tension wheel fixing seat 5, and a tension wheel assembly 6. The baffle 1 and the tension wheel fixing seat 5 are both mounted on the mounting beam 4. The tension wheel assembly 6 is slidably mounted on the tension wheel fixing seat 5. The nut 2 is adjacent to the baffle 1 and is sleeved on the adjusting rod 3. The adjusting rod 3 is connected to the tension wheel assembly 6. When the adjusting rod 3 moves axially, the tension wheel assembly 6 moves synchronously on the tension wheel fixing seat 5.

[0043] The beneficial effects of adopting this utility model's technical solution are: simple structure and low cost, which simplifies the installation process of the tensioning wheel; furthermore, the tension force can be adjusted within a certain range according to actual working conditions. It solves the problems of installation difficulties and difficulty in adjusting the tension force during the installation of the tensioning wheel in wheat harvesters.

[0044] The adjusting rod 3 can be a push rod, a pull rod, or a push-pull rod. The mounting beam 4 and the tension wheel fixing seat 5 can both be U-shaped structures.

[0045] The main purpose of this invention is to solve the problems of installation difficulties and tension force adjustment issues encountered during the installation of tensioning wheels in wheat harvesters. Furthermore, it simplifies the current tensioning wheel structure and reduces costs. The tensioning wheel push rod mechanism designed in this invention can be applied to, but is not limited to, the intermediate shaft tensioning wheel and the sieve box drive shaft tensioning wheel of a certain type of wheat harvester. Its structure is relatively simple and low-cost, greatly simplifying the installation process of the tensioning wheel. In addition, the tension force can be adjusted within a certain range according to actual working conditions.

[0046] 1. During installation, the tension force on the belt and the thrust of the push rod (adjusting rod) are balanced. The tension force can be adjusted by rotating the push rod (adjusting rod).

[0047] 2. The push rod (adjusting rod) head adopts a semi-circular head structure (semi-circular head), which can prevent the threads on the push rod (adjusting rod) from being damaged when pushing the tension wheel bolt shaft.

[0048] 3. The push rod (adjusting rod) has only one nut, which is a fixed welded nut, making the structure simpler and the installation easier.

[0049] like Figures 1 to 3 As shown, further, one end of the adjusting rod 3 is provided with an abutment portion, and the tensioning wheel assembly 6 is provided with a recessed portion that cooperates with the abutment portion, and the abutment portion and the recessed portion abut against each other.

[0050] The beneficial effect of adopting the above-mentioned further technical solution is that the tensioner assembly is provided with a recessed portion for engaging with the abutment portion on the adjusting rod. The abutment portion of the adjusting rod abuts against the recessed portion of the tensioner assembly, thereby pushing the tensioner assembly through the adjusting rod.

[0051] like Figures 1 to 3 As shown, the abutting part is a semi-circular head 31, the recessed part is a conical hole 611, and the semi-circular head 31 abuts in the conical hole 611.

[0052] The beneficial effects of adopting the above-mentioned further technical solution are as follows: The tensioning wheel assembly is provided with a tapered hole for engaging the semi-circular head on the adjusting rod. The semi-circular head of the adjusting rod abuts against the tapered hole of the tensioning wheel assembly, thereby pushing the tensioning wheel assembly. The semi-circular head structure of the adjusting rod head prevents damage to the threads on the adjusting rod when pushing the tensioning wheel bolt shaft. When engaging with the tapered hole, assembly is easier, the spherical surface and tapered surface contact is better, and the fit is more flexible. The adjusting rod has only one nut, resulting in a simpler structure and easier installation.

[0053] The semi-circular head 31 can be a hemispherical structure. For example... Figure 1As shown, the semi-circular head 31 is located at the right end of the adjusting rod 3. The semi-circular head 31 facilitates assembly; protects the initial thread of the adjusting rod 3 from damage; and allows for more flexible mating between the circular surface and the conical surface of the hole (conical hole). The number of nuts 2 can be one, and the nut 2 can be fixedly installed on the baffle 1.

[0054] The abutment part can be a semi-circular head or a conical frustum, the recessed part can be a cone or a semi-circular shape, and the abutment part can also be a steel ball.

[0055] It should be noted that after installation, the semi-circular head 31 of the push rod (adjusting rod 3) is positioned in the hole (tapered hole 611) of the tension wheel bolt shaft 61, pressing against the inner wall of the hole (tapered hole 611). Throughout the entire operation, one end of the push rod (adjusting rod 3) is under pressure, while the other end is screwed onto the welding nut (nut 2), preventing the semi-circular head 31 from separating from the tapered hole 611.

[0056] like Figures 1 to 3 and Figure 6 As shown, the nut 2 is further located on the left side of the baffle 1, or the nut 2 is located on the right side of the baffle 1.

[0057] The advantages of adopting the above-mentioned further technical solution are: there is only one nut on the adjusting rod, the structure is simpler, and the installation is more convenient. Changing the nut from the outside of the baffle to the inside of the baffle saves space.

[0058] like Figure 7 As shown, the adjusting rod 31 located between the baffle 1 and the tensioning wheel assembly 6 is a smooth rod 32.

[0059] The beneficial effect of adopting the above-mentioned further technical solution is that the thread at a certain range at the front end of the adjusting rod can be changed to a smooth rod, which can shorten the time required to rotate the adjusting rod during installation.

[0060] The side of the adjusting rod 31 furthest from the smooth rod 32 is still a threaded section.

[0061] like Figure 5 As shown, the tensioning wheel assembly 6 is further provided with a threaded through hole 612, and there are two nuts 2. The two nuts 2 are located on both sides of the baffle 1, and the two nuts 2 abut against the baffle 1 through washers 8. The threaded through hole 612, the two nuts 2 and the washers 8 are all sleeved on the adjusting rod 3.

[0062] The beneficial effects of adopting the above-mentioned further technical solution are: the tapered hole on the tension wheel bolt shaft is changed to a threaded through hole, the nut is changed to a nut with a washer on each side of the baffle, and by lengthening the adjusting rod, push and pull can be integrated.

[0063] like Figures 1 to 7 As shown, the nut 2 is a hexagonal nut, and the adjusting rod 3 is a hexagonal head bolt.

[0064] The advantages of adopting the above-mentioned further technical solution are: the adjusting rod is screwed onto the nut and can only move along the thread axis. The structure is simple and the cost is low.

[0065] like Figures 1 to 7 As shown, the tensioning wheel fixing seat 5 is further provided with a circular hole 51 for mounting the tensioning wheel assembly 6 and a limiting stroke hole 52 for sliding the tensioning wheel assembly 6. The circular hole 51 communicates with the limiting stroke hole 52, and the tensioning wheel assembly 6 is slidably mounted on the limiting stroke hole 52.

[0066] The beneficial effects of adopting the above-mentioned further technical solution are: the round hole is used to install the tensioner assembly; the limit stroke hole is used to cooperate with the movement of the tensioner assembly; and the installation and maintenance of the tensioner assembly are facilitated.

[0067] like Figure 4 As shown, the tensioner assembly 6 further includes: a tensioner bolt shaft 61, a hexagonal flange nut 62, a flat washer 63, a pair of deep groove ball bearings 64, a tube 65, a square washer 66, a bushing 67, and a tensioner 68 for abutting against the belt 7. One end of the tensioner bolt shaft 61 is slidably mounted on the tensioner fixing seat 5. The hexagonal flange nut 62, the flat washer 63, the square washer 66, and the bushing 67 are all sleeved on the tensioner bolt shaft 61. The square washer 66 is located at one end of the bushing 67, the hexagonal flange nut 62 and the flat washer 63 are both located at the other end of the bushing 67, the flat washer 63 is located between the hexagonal flange nut 62 and the bushing 67, a pair of deep groove ball bearings 64 and the intermediate tube 65 are both sleeved on the outside of the bushing 67, the intermediate tube 65 is located between the pair of deep groove ball bearings 64, and the tensioning wheel 68 is sleeved on the outside of the pair of deep groove ball bearings 64.

[0068] The beneficial effects of adopting the above-mentioned further technical solution are: simplified tensioner structure and reduced cost. A hexagonal flange nut is used for fixing and disassembling the tensioner assembly. A square washer is used to engage with the tensioner bolt shaft to clamp the tensioner fixing seat, thus securing the tensioner assembly. A pair of deep groove ball bearings are used to support the stable rotation of the tensioner, preventing it from wobbling and reducing friction. A spacer tube separates the pair of deep groove ball bearings. The outer side of the belt engages with the tensioner in the tensioner assembly; an interaction force exists between them, and the belt is tensioned by the thrust of the tensioner.

[0069] The tensioner 68 may be equipped with an oil injection nozzle, which is connected to the inner ring of the tensioner 68 through a flow channel.

[0070] like Figures 1 to 7 As shown, further, one end of the tension wheel bolt shaft 61 is provided with a shaft head, and an elongated boss 613 is provided near the shaft head of the tension wheel bolt shaft 61. The elongated boss 613 is slidably mounted on the tension wheel fixing seat 5, and the tension wheel fixing seat 5 is located between the shaft head and the square pad 66. A tapered hole 611 is provided on the shaft head, and the adjusting rod 3 is connected to the tapered hole 611, or a threaded through hole 612 is provided at one end of the tension wheel bolt shaft 61.

[0071] The beneficial effects of adopting the above-mentioned further technical solution are: the elongated boss is used to cooperate with the tension wheel fixing seat. The semi-circular head of the adjusting rod abuts against the tapered hole at the shaft head of the tension wheel bolt shaft, and the tension wheel bolt shaft is pushed by rotating the adjusting rod, thereby pushing the tension wheel assembly.

[0072] The length of the square pad 66 and the diameter of the shaft head can both be greater than the diameter of the limit stroke hole 52 on the tension wheel fixing seat 5.

[0073] like Figures 1 to 4 As shown, the tension wheel push rod mechanism provided in this embodiment of the present invention includes: a baffle 1, a welded hexagonal nut (nut 2), a push rod (adjusting rod 3), a mounting beam 4, a tension wheel fixing seat 5, a tension wheel assembly 6, and a belt 7.

[0074] The tensioner assembly consists of six parts: tensioner bolt shaft 61, hexagonal flange nut 62, flat washer 63, deep groove ball bearing 64, tube 65, square washer 66, bushing 67, and tensioner 68.

[0075] The tension wheel bolt shaft 61 has a simple hole (tapered hole 611) in the middle of its shaft head to mate with the push rod (adjusting rod 3). A long, narrow boss 613 is located below the shaft head to mate with the tension wheel fixing seat 5. The push rod (adjusting rod 3) is similar to a fully threaded hexagonal head bolt, with a semi-circular head 31 at the threaded end (one end of the adjusting rod 3 has a threaded head). The baffle 1 is fixed to the mounting beam 4 by welding, and a welded hexagonal nut (nut 2) is fixed to the baffle 1. The tension wheel fixing seat 5 is fixed to the mounting beam 4 by welding. The tension wheel fixing seat 5 has a large circular hole (circular hole 51) for mounting the tension wheel bolt shaft 61 and a limit stroke hole 52 for accommodating the movement of the tension wheel bolt shaft 61. The tensioner assembly 6 is assembled separately. During assembly, the tensioner bolt shaft 61 is the core, and the following components are installed in sequence: square washer 66, bushing 67, first deep groove ball bearing 64, intermediate tube 65, tensioner 68, second deep groove ball bearing 64, flat washer 63, and hexagonal flange nut 62. The tensioner assembly 6 is fixed on the tensioner mounting base 5. During installation, the flange nut (hexagonal flange nut 62) is first loosened. Then, the tensioner bolt shaft 61 is passed through the large round hole (round hole 51) on the tensioner mounting base 5 and moved into the limit stroke hole 52. At this time, the tensioner assembly 6 can only move back and forth along the limit stroke hole 52. After the tensioner assembly 6 moves to the corresponding position, the hexagonal flange nut 62 at the shaft head of the tensioner bolt shaft 61 is tightened to fix the tensioner assembly 6. The push rod (adjusting rod 3) is screwed onto a welded hexagonal nut (nut 2) and can only move along the threaded axis. The semi-circular head 31 of the threaded end of the push rod (adjusting rod 3) abuts against the simple hole (tapered hole 611) at the shaft head of the tension wheel bolt shaft 61. By rotating the hexagonal head (the hexagonal head of the adjusting rod 3), the tension wheel bolt shaft 61 is pushed, thereby pushing the tension wheel assembly 6. The outer side of the belt 7 mates with the tension wheel 68 in the tension wheel assembly 6, and there is an interaction force between the two. The belt 7 is tensioned by the thrust of the tension wheel 68.

[0076] 1. The tension of the belt and the thrust of the push rod (adjusting rod) are in balance. Rotating the push rod (adjusting rod) increases the thrust, and the tension increases accordingly. Therefore, the tension of the belt can be adjusted directly by adjusting the magnitude of the thrust.

[0077] 2. The semi-circular head push rod (adjusting rod) provides better contact between the spherical and conical surfaces when it mates with the hole (tapered hole), and also prevents damage to the thread on the head of the push rod (adjusting rod).

[0078] 3. The push rod (adjusting rod) has only one nut, which is a welded nut located on the baffle, making the structure simpler and the installation easier.

[0079] As an alternative to the above technical solution: like Figure 5As shown, Option 1: Where space permits, the simple hole (tapered hole) on the tension wheel bolt shaft is replaced with a threaded through hole 612, and the welded nut (nut 2) is replaced with a hexagonal nut (nut 2) on each side of the baffle 1, equipped with a large washer. By lengthening the push rod (adjusting rod 3), a push-pull mechanism can be achieved. When used as a push rod, the belt 7 is on the right side of the tension wheel 68. At this time, the hexagonal nut (nut 2) on the left side of the baffle 1 is loosened, and the hexagonal nut (nut 2) on the right side of the baffle 1 rotates synchronously with the push rod (adjusting rod 3). Rotating the push rod (adjusting rod 3) clockwise in place causes the tension wheel bolt shaft 61 to move along the limit stroke hole 52 due to the limitation of the upper limit stroke hole 52 of the tension wheel fixing seat 5. When the belt 7 is tensioned to the appropriate degree, the tension wheel 68 will be tensioned. After tensioning, tighten the hexagonal nut (nut 2) on the left side of the baffle 1 to fix the push rod (adjusting rod 3). When used as a pull rod, the belt 7 is to the left of the tensioning pulley 68. Loosen the right-side hexagonal nut (nut 2), the left-side hexagonal nut (nut 2) of the baffle 1, and the pull rod (adjusting rod 3) rotate synchronously. Rotate the pull rod (adjusting rod 3) counterclockwise in place. The tensioning pulley bolt shaft 61 will move along the limit stroke hole 52 due to the limitation of the upper limit stroke hole 52 of the tensioning pulley fixing seat 5. When the belt 7 is tensioned to the appropriate degree, the tensioning pulley 68 will be tensioned. After tensioning, tighten the right-side hexagonal nut (nut 2) of the baffle 1 to fix the pull rod (adjusting rod 3).

[0080] like Figure 6 As shown, Option 2: The welded hexagonal nut (nut 2) is changed from the outer side (left side) of baffle 1 to the inner side (right side) of baffle 1, which can save space.

[0081] like Figure 7 As shown, in Option 3, the thread at a certain range on the front end of the push rod (adjusting rod 3) can be replaced with a smooth rod 32, which can shorten the time required to rotate the push rod (adjusting rod 3) during installation. Here, the push rod (adjusting rod 3) is essentially a bolt with an extended thread, and the front end of the thread refers to the first section of the threaded segment.

[0082] In addition, this utility model also provides a harvester, including the tension wheel adjustment mechanism described above.

[0083] The beneficial effects of adopting this utility model's technical solution are: simple structure and low cost, which simplifies the installation process of the tensioning wheel; furthermore, the tension force can be adjusted within a certain range according to actual working conditions. It solves the problems of installation difficulties and difficulty in adjusting the tension force during the installation of the tensioning wheel in wheat harvesters.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A tensioner pulley adjustment mechanism characterized by, include: The system includes a baffle, a nut, an adjusting rod, a mounting beam, a tension wheel fixing seat, and a tension wheel assembly. The baffle and the tension wheel fixing seat are both mounted on the mounting beam. The tension wheel assembly is slidably mounted on the tension wheel fixing seat. The nut is adjacent to the baffle and is sleeved on the adjusting rod. The adjusting rod is connected to the tension wheel assembly. When the adjusting rod moves axially, it causes the tension wheel assembly to move synchronously on the tension wheel fixing seat.

2. The tension wheel adjustment mechanism according to claim 1, characterized in that, One end of the adjusting rod is provided with an abutment portion, and the tensioning wheel assembly is provided with a recessed portion that mates with the abutment portion, and the abutment portion and the recessed portion abut against each other.

3. The tension wheel adjustment mechanism according to claim 2, characterized in that, The abutting part is a semi-circular head, and the recessed part is a conical hole, with the semi-circular head abutting in the conical hole.

4. The tension wheel adjusting mechanism according to claim 2, characterized in that, The nut is located on the left side of the baffle, or the nut is located on the right side of the baffle.

5. A tension wheel adjusting mechanism according to claim 3, characterized in that, The adjusting rod located between the baffle and the tensioning wheel assembly is a smooth rod.

6. The tension wheel adjusting mechanism according to claim 1, characterized in that, The tensioning wheel assembly is provided with a threaded through hole, and there are two nuts. The two nuts are located on both sides of the baffle, and the two nuts abut against the baffle through washers. The threaded through hole, the two nuts and the washers are all sleeved on the adjusting rod.

7. The tension wheel adjusting mechanism according to claim 1, characterized in that, The tensioning wheel mounting base is provided with a circular hole for mounting the tensioning wheel assembly and a limiting stroke hole for sliding the tensioning wheel assembly. The circular hole communicates with the limiting stroke hole, and the tensioning wheel assembly is slidably mounted on the limiting stroke hole.

8. A tension wheel adjusting mechanism according to claim 1, characterized in that, The tensioner assembly includes: a tensioner bolt shaft, a hexagonal flange nut, a flat washer, a pair of deep groove ball bearings, a spacer tube, a square washer, a bushing, and a tensioner for contacting the belt. One end of the tensioner bolt shaft is slidably mounted on the tensioner mounting base. The hexagonal flange nut, the flat washer, the square washer, and the bushing are all fitted onto the tensioner bolt shaft. The square washer is located at one end of the bushing, and the hexagonal flange nut and the flat washer are both located at the other end of the bushing. The flat washer is located between the hexagonal flange nut and the bushing. The pair of deep groove ball bearings and the spacer tube are both fitted onto the outside of the bushing. The spacer tube is located between the pair of deep groove ball bearings, and the tensioner is fitted onto the outside of the pair of deep groove ball bearings.

9. A tension wheel adjusting mechanism according to claim 8, characterized in that, One end of the tension wheel bolt shaft is provided with a shaft head, and an elongated boss is provided near the shaft head of the tension wheel bolt shaft. The elongated boss is slidably mounted on the tension wheel fixing seat, which is located between the shaft head and the square pad. A tapered hole is provided on the shaft head, and the adjusting rod is connected to the tapered hole, or a threaded through hole is provided at one end of the tension wheel bolt shaft.

10. A harvester, characterized in that, The tension wheel adjustment mechanism includes any one of claims 1 to 9.

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