Tensioning device and harvester

Abstract

The utility model belongs to the technical field of agricultural equipment, and discloses a tensioning device and a harvester. The tensioning device comprises a sliding installation base, a fixed installation base fixedly arranged and an elastic adjusting assembly, one end of the sliding installation base is inserted into the fixed installation base in a sliding mode, and a protection cavity is formed between the sliding installation base and the fixed installation base; a tensioning wheel is arranged at the other end of the sliding mounting seat; the elastic adjusting assembly comprises an elastic piece and an adjusting assembly, and the elastic piece is distributed in the protection cavity; in the first direction, the adjusting assembly is arranged on the fixed mounting base in a position-adjustable mode, one end of the adjusting assembly extends into the protection cavity and abuts against one end of the elastic piece, and the other end of the elastic piece abuts against the sliding mounting base; the elastic piece is in a compressed state and can deform in the first direction. The working performance of the elastic adjusting assembly can be effectively prevented from being affected by dust and / or scraps, the working performance of the tensioning device is improved, and the service life of the tensioning device is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery and equipment, in particular to a tensioning device and a harvester. Background Art

[0002] Corn harvester is an agricultural machine that completes multiple operations such as picking corn ears, piling corn, and returning corn stalks to the field at one time when corn is ripe. After the corn ears are picked, the pulling chain transports the corn ears, so the tension of the pulling chain directly affects the working performance of the pulling chain and the reliability of the corn harvester.

[0003] At present, there is a tensioning device in the prior art, which is mainly composed of a tensioning wheel, an elastic member adjusting screw and a fixing seat. The elastic member and the tensioning wheel can be driven to move by screwing the adjusting screw, so that the elastic member is compressed and elastically deformed, and the tensioning wheel simultaneously tensions the straw chain. Although the straw chain can be adjusted and tensioned, when this tensioning device is applied to the straw chain of a corn harvester, since the elastic member, the adjusting screw and other structures of the tensioning device are exposed to the outside world, dust and / or debris are easily attached during the ear picking process, and after long-term work, the adjustment performance and service life of the adjusting screw will be affected. Utility Model Content

[0004] The utility model aims to provide a tensioning device and a harvester, so as to solve the above-mentioned problems existing when a tensioning device in the prior art is applied to a corn harvester's pulling chain.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] Tensioning device, comprising:

[0007] A sliding mounting seat and a fixed mounting seat, wherein one end of the sliding mounting seat is slidably inserted into the fixed mounting seat and a protective cavity is formed between the sliding mounting seat and the fixed mounting seat; a tensioning wheel is arranged at the other end of the sliding mounting seat;

[0008] An elastic adjustment component, the elastic adjustment component includes an elastic member and an adjustment component, the elastic member is distributed in the protective cavity; along a first direction, the adjustment component is adjustably arranged on the fixed mounting seat, one end of the adjustment component extends into the protective cavity and abuts against one end of the elastic member, and the other end of the elastic member abuts against the sliding mounting seat; the elastic member is in a compressed state and can be deformed along the first direction.

[0009] As a preferred solution of the above-mentioned tensioning device, the adjustment assembly includes a screw rod, the screw rod is threadedly connected to the fixed mounting seat, and the screw rod portion extends into the protective cavity and abuts against one end of the elastic member.

[0010] As a preferred solution of the above-mentioned tensioning device, the adjustment assembly also includes a locking nut, which is threadedly connected to the screw and distributed outside the protective cavity, and the locking nut can abut against the fixed mounting seat along the axial direction of the screw.

[0011] As a preferred solution of the above-mentioned tensioning device, one end of the screw rod extending into the protective cavity and / or the sliding mounting seat is fixedly provided with a limit seat, and the limit seat is used to limit the setting position of the elastic member.

[0012] As a preferred solution of the above-mentioned tensioning device, the tensioning device further includes a limit assembly, and the limit assembly is used to limit the sliding range of the sliding mounting seat.

[0013] As a preferred solution of the above-mentioned tensioning device, the limiting assembly includes a limiting long strip hole and a limiting column, the limiting long strip hole is arranged at one of the sliding mounting seat and the fixed mounting seat, and the limiting column is arranged at the other of the sliding mounting seat and the fixed mounting seat;

[0014] The limiting column is inserted into the limiting long strip hole and can move along the first direction in the limiting long strip hole.

[0015] As a preferred solution of the above-mentioned tensioning device, the fixed mounting seat includes a first mounting portion and a second mounting portion connected to each other, the first mounting portion is located at one end of the second mounting portion along the length direction, and the first mounting portion and the second mounting portion are spaced apart along a second direction, and the first direction is perpendicular to the second direction and both are perpendicular to the axial direction of the tensioning wheel;

[0016] One end of the sliding mounting seat is slidably inserted into the first mounting portion, and the protective cavity is formed between the first mounting portion; the adjustment component is adjustably arranged on the first mounting portion, and one end of the adjustment component extends into the protective cavity and abuts against one end of the elastic member; the second mounting portion is used to be fixedly connected to an external mounting substrate.

[0017] As a preferred solution of the above-mentioned tensioning device, the fixed mounting seat is provided with a first protective groove, and the first protective groove is distributed along the second direction on the outside of the first mounting part and / or the outside of the second mounting part; the chain can be partially accommodated in the first protective groove.

[0018] As a preferred solution of the above-mentioned tensioning device, one of the outer peripheral wall of the sliding mounting seat and the inner peripheral wall of the first mounting portion is provided with a sliding groove extending along the first direction, and the other is provided with a sliding block, and the sliding block is slidably matched with the sliding groove.

[0019] The harvester includes an ear picking device, a tensioning wheel, a pulling chain, a driving wheel, and the above-mentioned tensioning device, wherein the fixed mounting seat is fixedly connected to the frame of the ear picking device, the driving wheel is rotatably connected to the frame, and the pulling chain is meshed with the driving wheel and the tensioning wheel.

[0020] Beneficial effects of the utility model:

[0021] The utility model provides a tensioning device and a harvester. The tensioning device comprises a sliding mounting seat, a fixed mounting seat, and an elastic adjustment component; one end of the sliding mounting seat is slidably inserted in the fixed mounting seat, and a protective cavity is formed between the sliding mounting seat and the fixed mounting seat; the other end of the sliding mounting seat is provided with a tensioning wheel; the elastic adjustment component comprises an elastic member and an adjustment component, and the elastic member is distributed in the protective cavity; along a first direction, the adjustment component is adjustably arranged on the fixed mounting seat, one end of the adjustment component extends into the protective cavity and abuts against one end of the elastic member, and the other end of the elastic member abuts against the sliding mounting seat; the elastic member is in a compressed state and can be deformed along the first direction.

[0022] The tensioning device is provided with one end of a sliding mounting seat being slidably inserted in the fixed mounting seat, and the two ends of the elastic member are respectively in contact with one end of the adjusting assembly extending into the protective cavity and the sliding mounting seat. It can be understood that the elastic member and the sliding mounting seat can both move relative to the fixed mounting seat along the first direction. Specifically, when adjusting the tension of the chain, the elastic member is driven by the adjusting assembly to approach the chain along the first direction, and the sliding mounting seat is synchronously approached to the chain along the first direction under the action of the elastic member, so that the tensioning wheel arranged on the sliding mounting seat is synchronously approached to the chain along the first direction until the tensioning wheel tensions the chain, and in this process, the elastic member undergoes elastic deformation, and the elastic restoring force of the elastic member enables the tensioning wheel to maintain the state of tensioning the chain, thereby effectively improving the working performance of the chain. Among them, by providing a protective cavity between the sliding mounting seat and the fixed mounting seat, the elastic member is distributed in the protective cavity, and the end of the adjusting assembly abutting against the elastic member is also distributed in the protective cavity, so that compared with the prior art, dust and / or debris can be effectively avoided from affecting the working performance of the elastic adjustment assembly, and the service life of the elastic adjustment assembly is effectively improved. Thereby, the working performance and service life of the tensioning device are effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a tensioning device provided by a specific embodiment of the utility model;

[0024] Figure 2 is a cross-sectional view of a tensioning device provided by a specific embodiment of the utility model;

[0025] Figure 3 It is a cross-sectional view of a mounting plate of a tensioning device provided by a specific embodiment of the utility model being assembled on a sliding mounting seat;

[0026] Figure 4 It is a cross-sectional view of a limit column of a tensioning device provided by a specific embodiment of the utility model being assembled on a fixed mounting seat;

[0027] Figure 5 It is a cross-sectional view of a limit seat of a tensioning device provided in a specific embodiment of the utility model;

[0028] Figure 6 yes Figure 2 Partial view at A.

[0029] In the figure:

[0030] 1. Sliding mounting seat; 11. Wheel axle; 12. Second protection groove;

[0031] 2. Fixed mounting seat; 21. First mounting portion; 211. First sub-protection hole; 212. Second sub-protection hole; 22. Second mounting portion;

[0032] 3. Protective cavity;

[0033] 4. Tensioner;

[0034] 5. elastic adjustment component; 51. elastic member; 52. adjustment component; 521. screw rod; 5211. handle; 522. locking nut; 523. limit seat; 5231. first step portion; 5232. second step portion;

[0035] 6. Limiting assembly; 61. Mounting plate; 611. Limiting long hole; 62. Limiting column; 63. Limiting nut;

[0036] 7. Bearings. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0038] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0041] Figure 1-4 The ab direction in is the first direction. Figure 1 The cd direction in is the second direction.

[0042] The utility model provides a tensioning device, such as Figure 1-4 As shown, the tensioning device includes a sliding mounting seat 1, a fixedly arranged fixed mounting seat 2, and an elastic adjustment component 5. Among them, one end of the sliding mounting seat 1 is slidably inserted in the fixed mounting seat 2, and a protective cavity 3 is formed between the sliding mounting seat 1 and the fixed mounting seat 2; the other end of the sliding mounting seat 1 is provided with a tensioning wheel 4; the elastic adjustment component 5 includes an elastic member 51 and an adjustment component 52, and the elastic member 51 is distributed in the protective cavity 3; along the first direction, the adjustment component 52 is adjustably arranged on the fixed mounting seat 2, one end of the adjustment component 52 extends into the protective cavity 3 and abuts against one end of the elastic member 51, and the other end of the elastic member 51 abuts against the sliding mounting seat 1; the elastic member 51 is in a compressed state and can be deformed along the first direction.

[0043] like Figure 1-4As shown, the tensioning device is provided with one end of the sliding mounting seat 1 being slidably inserted in the fixed mounting seat 2, and the two ends of the elastic member 51 are respectively in contact with the end of the adjusting component 52 extending into the protective cavity and the sliding mounting seat 1. It can be understood that the elastic member 51 and the sliding mounting seat 1 can both move along the first direction relative to the fixed mounting seat 2. Specifically, when adjusting the tension of the chain, the elastic member 51 is driven to approach the chain along the first direction by the adjusting component 52, and the sliding mounting seat 1 is synchronously approached to the chain along the first direction under the action of the elastic member 51, so that the tensioning wheel 4 arranged on the sliding mounting seat 1 is synchronously approached to the chain along the first direction until the tensioning wheel 4 tensions the chain. In this process, the elastic member 51 undergoes elastic deformation, and the elastic restoring force of the elastic member 51 enables the tensioning wheel 4 to maintain the state of tensioning the chain, thereby effectively improving the working performance of the chain. Among them, by setting the protection cavity 3 between the sliding mounting seat 1 and the fixed mounting seat 2, the elastic member 51 is distributed in the protection cavity 3, and the end of the adjustment component 52 that abuts against the elastic member 51 is also distributed in the protection cavity 3, so that compared with the prior art, dust and / or debris can be effectively prevented from affecting the working performance of the elastic adjustment component 5, and the service life of the elastic adjustment component 5 is effectively improved. Thereby, the working performance and service life of the tensioning device are effectively improved.

[0044] Among them, Figure 1-3 As shown, the adjustment component 52 includes a screw 521, which is threadedly connected to the fixed mounting seat 2, and the screw 521 partially extends into the protective cavity 3 and abuts against one end of the elastic member 51. Specifically, when adjusting the tension of the chain, the elastic member 51 can be driven to approach the chain along the first direction by screwing the screw 521, and the sliding mounting seat 1 is synchronously approached to the chain along the first direction under the action of the elastic member 51, so that the tensioning wheel 4 arranged on the sliding mounting seat 1 is synchronously approached to the chain along the first direction to achieve the tensioning of the chain. Among them, the screw 521 is threadedly connected to the fixed mounting seat 2 and partially extends into the protective cavity 3. It can be understood that the threaded hole on the fixed mounting seat 2 that is threadedly connected to the screw 521 is part of the protective cavity 3, so that the connection between the adjustment component 52 and the fixed mounting seat 2 is distributed in the protective cavity 3, so that dust and / or debris can be effectively prevented from affecting the working performance of the elastic adjustment component 5, and the service life of the elastic adjustment component 5 is effectively improved.

[0045] Specifically, Figure 1-2 and Figure 4As shown, the adjustment assembly 52 also includes a locking nut 522, which is threadedly connected to the screw rod 521 and distributed outside the protective cavity 3, and the locking nut 522 can abut against the fixed mounting seat 2 along the axial direction of the screw rod 521. It can be understood that the axial direction of the screw rod 521 is parallel to the first direction. By arranging the locking nut 522 to be distributed outside the protective cavity 3 and to abut against the fixed mounting seat 2 along the axial direction of the screw rod 521, when the locking nut 522 is screwed to abut against the fixed mounting seat 2 along the axial direction of the screw rod 521, the relative position of the screw rod 521 and the fixed mounting seat 2 can be effectively locked, the elastic deformation degree of the elastic member 51 is maintained, and the distribution position of the tension wheel 4 remains unchanged, thereby ensuring that the chain is in a tensioned state.

[0046] Preferably, if Figure 2 As shown, the elastic member 51 is a spring.

[0047] Alternatively, if Figure 2 and Figure 5 As shown, one end of the screw rod 521 extending into the protective cavity 3 and / or the sliding mounting seat 1 is fixedly provided with a limit seat 523, and the limit seat 523 is used to limit the setting position of the elastic member 51. The limit seat 523 is provided to limit the setting position of the elastic member 51, so that the elastic member 51 is elastically deformed only along the first direction, thereby further improving the working performance and service life of the elastic member 51.

[0048] Specifically, Figure 2 and Figure 5 As shown, the limiting seat 523 is stepped, and the limiting seat 523 includes a first step portion 5231 and a second step portion 5232 connected to each other, and the outer diameter of the first step portion 5231 is smaller than the outer diameter of the second step portion 5232; the end of the elastic member 51 is inserted into the first step portion 5231 along the first direction and abuts against the second step portion 5232; the second step portion 5232 is used to be fixedly connected with the end of the screw 521 extending into the protective cavity 3 and the sliding mounting seat 1. In order to achieve the ability to limit the setting position of the elastic member 51, it is ensured that the elastic member 51 is elastically deformed only along the first direction. Preferably, from the second step portion 5232 to the direction of the first step portion 5231, the outer diameter of the first step portion 5231 gradually decreases. It is convenient to insert the elastic member 51 into the first mounting portion 21. Among them, the connection method of the second step portion 5232 and the end of the screw 521 extending into the protective cavity 3 can be selected from welding or threaded connection. The second step portion 5232 can be fixedly connected to the sliding mounting seat 1 by welding or threaded connection.

[0049] It is understandable that other types of limit seats 523 may also be used to limit the setting position of the elastic member 51 and ensure that the elastic member 51 is elastically deformed only along the first direction.

[0050] Specifically, in this embodiment, Figure 2 and Figure 5 As shown, an end of the screw rod 521 extending into the protective cavity 3 is provided with a limit seat 523, one end of the elastic member 51 is inserted into the first step portion 5231 of the limit seat 523 along the first direction and abuts against the second step portion 5232, and the second step portion 5232 is also fixedly connected to the end of the screw rod 521 extending into the protective cavity 3.

[0051] Alternatively, if Figure 1 and Figure 2 As shown, one end of the screw rod 521 extending out of the protection cavity 3 is provided with a handle 5211 to facilitate screwing the screw rod 521 .

[0052] Among them, Figure 1 and Figure 6 As shown, the tensioning device further includes a limit assembly 6, which is used to limit the sliding range of the sliding mounting seat 1. This arrangement can prevent the sliding mounting seat 1 from being separated from the fixed mounting seat 2 along the first direction under the elastic restoring force of the elastic member 51 when the chain breaks, thereby improving the safety of the tensioning device.

[0053] Specifically, Figure 1 , Figure 3 , Figure 4 and Figure 6 As shown, the limiting assembly 6 includes a limiting long hole 611 and a limiting column 62, wherein the limiting long hole 611 is provided in one of the sliding mounting seat 1 and the fixed mounting seat 2, and the limiting column 62 is provided in the other of the sliding mounting seat 1 and the fixed mounting seat 2; the limiting column 62 is inserted into the limiting long hole 611 and can move in the limiting long hole 611 along the first direction, so as to limit the sliding range of the sliding mounting seat 1 and prevent the sliding mounting seat 1 from being separated from the fixed mounting seat 2 along the first direction under the elastic restoring force of the elastic member 51.

[0054] Specifically, in this embodiment, Figure 1 , Figure 3 , Figure 4 and Figure 6 As shown, the limiting strip hole 611 is provided on the sliding mounting seat 1, and the limiting column 62 is provided on the fixed mounting seat 2; the limiting column 62 is inserted into the limiting strip hole 611, and can move in the limiting strip hole 611 along the first direction. Further, the sliding mounting seat 1 is provided with a mounting plate 61 distributed outside the fixed mounting seat 2, and the limiting strip hole 611 is provided on the mounting plate 61. Further, the limiting nut 63 is threadedly connected to the free end of the limiting column 62, and the outer diameter of the limiting nut 63 is greater than the width of the limiting strip hole 611. This prevents the limiting column 62 from being separated from the limiting strip hole 611, thereby further preventing the sliding mounting seat 1 from being separated from the fixed mounting seat 2 along the first direction under the elastic restoring force of the elastic member 51.

[0055] As an alternative, the limiting elongated hole 611 may be provided on the fixed mounting seat 2 , and the limiting column 62 may be provided on the sliding mounting seat 1 ; the limiting column 62 is inserted into the limiting elongated hole 611 and can move in the limiting elongated hole 611 along the first direction.

[0056] Among them, Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, the fixed mounting seat 2 includes a first mounting portion 21 and a second mounting portion 22 connected to each other, the first mounting portion 21 is located at one end of the second mounting portion 22 along the length direction, and the first mounting portion 21 and the second mounting portion 22 are spaced apart along the second direction, the first direction is perpendicular to the second direction and both are perpendicular to the axial direction of the tensioning wheel 4; one end of the sliding mounting seat 1 is slidably inserted in the first mounting portion 21, and a protective cavity 3 is formed between the first mounting portion 21 and the first mounting portion 21; the adjustment component 52 is adjustably arranged on the first mounting portion 21, one end of the adjustment component 52 extends into the protective cavity 3 and abuts against one end of the elastic member 51; the second mounting portion 22 is used to be fixedly connected to the external mounting substrate. It can be understood that the screw 521 is threadedly connected to the first mounting portion 21, and the locking nut 522 can abut against the first mounting portion 21 along the axial direction of the screw 521.

[0057] The first mounting portion 21 is arranged at one end of the second mounting portion 22 along the length direction, so that an escape space is formed between the first mounting portion 21 and the second mounting portion 22, which facilitates the installation of the fixed mounting seat 2 on the external mounting substrate and reduces the weight of the fixed mounting seat 2. The first mounting portion 21 and the second mounting portion 22 are arranged to be spaced apart along the second direction, which can increase the total length of the fixed mounting seat 2 along the second direction, facilitate the arrangement of tensioning wheels 4 of different sizes on the sliding mounting seat 1, and reduce the space occupied by the tensioning device along the axial direction of the tensioning wheel 4.

[0058] Specifically, in this embodiment, Figure 2-4 As shown, the first mounting portion 21 is provided with a first sub-protection hole 211 and a second sub-protection hole 212 connected along the first direction, and the first sub-protection hole 211 and the second sub-protection hole 212 pass through the first mounting portion 21 along the first square; the sliding mounting seat 1 is provided with a second protection groove 12 extending along the first direction, and a protection cavity 3 is formed between the first sub-protection hole 211, the second sub-protection hole 212 and the second protection groove 12. The first sub-protection hole 211 is a threaded hole, and the screw 521 is threadedly connected to the threaded hole and partially extends into the protection cavity 3.

[0059] Specifically, in this embodiment, Figure 1 and Figure 6As shown, the limiting column 62 is disposed on the first mounting portion 21. And the limiting column 62 is distributed along the first direction at one end of the first mounting portion 21 close to the tension wheel 4. The sliding range of the sliding mounting seat 1 along the first direction can be increased.

[0060] Preferably, the fixed mounting seat 2 is provided with a first protection groove, which is distributed along the second direction on the outside of the first mounting portion 21 and / or the outside of the second mounting portion 22; the chain can be partially accommodated in the first protection groove. This arrangement enables the chain to be protected by the first protection groove; secondly, the first protection groove is arranged along the second direction on the outside of the first mounting portion 21 and / or the outside of the second mounting portion 22, which can also increase the total length of the fixed mounting seat 2 along the second direction, and further facilitate the arrangement of tensioning wheels 4 of different sizes on the sliding mounting seat 1.

[0061] Specifically, in this embodiment, along the second direction, first protective grooves are exemplarily provided on the outer sides of the first mounting portion 21 and the second mounting portion 22 .

[0062] Preferably, the first mounting portion 21 and the second mounting portion 22 of the fixed mounting seat 2 are integrally formed, which can reduce the number of parts, facilitate assembly, and improve the structural strength of the fixed mounting seat 2.

[0063] Among them, one of the outer peripheral wall of the sliding mounting seat 1 and the inner peripheral wall of the first mounting portion 21 is provided with a slide groove extending in the first direction, and the other is provided with a slider, and the slider is slidably matched with the slide groove. Such an arrangement can prevent the sliding mounting seat 1 and the first mounting portion 21 from rotating relative to each other, thereby preventing the tensioning wheel 4 from rotating relative to the first mounting portion, and ensuring reliable engagement between the tensioning wheel 4 and the chain. Thereby further improving the reliability of the tensioning device.

[0064] Among them, in this embodiment, if Figure 2 As shown, the tensioning wheel 4 is rotatably connected to the sliding mounting seat 1 through the bearing 7. Specifically, the sliding mounting seat 1 is provided with a wheel shaft 11, the inner ring of the bearing 7 is fixedly sleeved on the wheel shaft 11, and the tensioning wheel 4 is fixedly sleeved on the outer ring of the bearing 7. In this way, the tensioning wheel 4 is rotatably connected to the sliding mounting seat 1.

[0065] The utility model also provides a harvester, including an ear picking device, a tensioning wheel 4, a pulling chain, a driving wheel, and a tensioning device as described above, wherein a fixed mounting seat 2 is fixedly connected to the frame of the ear picking device, and the driving wheel is rotatably connected to the frame. The chain is a pulling chain and is meshed with the driving wheel and the tensioning wheel. The external mounting base plate is a part of the frame of the ear picking device. The specific structure of the ear picking device belongs to the prior art and will not be repeated here.

[0066] By adopting the above-mentioned tensioning device, it is possible to effectively prevent dust and / or debris from affecting the working performance of the elastic adjustment component 5, thereby effectively improving the working performance and service life of the tensioning device.

[0067] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A tensioning device, characterized in that: include: A sliding mounting seat (1) and a fixed mounting seat (2), wherein one end of the sliding mounting seat (1) is slidably inserted into the fixed mounting seat (2) and a protective cavity (3) is formed between the sliding mounting seat (1) and the fixed mounting seat (2); a tensioning wheel (4) is provided at the other end of the sliding mounting seat (1); An elastic adjustment component (5), the elastic adjustment component (5) comprising an elastic member (51) and an adjustment component (52), the elastic member (51) being distributed in the protective cavity (3); along a first direction, the adjustment component (52) is adjustably arranged on the fixed mounting seat (2), one end of the adjustment component (52) extends into the protective cavity (3) and abuts against one end of the elastic member (51), and the other end of the elastic member (51) abuts against the sliding mounting seat (1); the elastic member (51) is in a compressed state and can be deformed along the first direction.

2. The tensioning device according to claim 1, characterized in that: The adjustment assembly (52) comprises a screw rod (521), the screw rod (521) being threadedly connected to the fixed mounting seat (2), and a portion of the screw rod (521) extending into the protective cavity (3) and abutting against one end of the elastic member (51).

3. The tensioning device according to claim 2, characterized in that: The adjustment assembly (52) further comprises a locking nut (522), wherein the locking nut (522) is threadedly connected to the screw rod (521) and is distributed outside the protective cavity (3), and the locking nut (522) can abut against the fixed mounting seat (2) along the axial direction of the screw rod (521).

4. The tensioning device according to any one of claims 2 to 3, characterized in that: One end of the screw rod (521) extending into the protective cavity (3) and / or the sliding mounting seat (1) is fixedly provided with a limit seat (523), and the limit seat (523) is used to limit the setting position of the elastic member (51).

5. The tensioning device according to any one of claims 1 to 3, characterized in that: The tensioning device further comprises a position limiting assembly (6), wherein the position limiting assembly (6) is used to limit the sliding range of the sliding mounting seat (1).

6. The tensioning device according to claim 5, characterized in that: The limiting assembly (6) comprises a limiting elongated hole (611) and a limiting column (62), wherein the limiting elongated hole (611) is arranged at one of the sliding mounting seat (1) and the fixed mounting seat (2), and the limiting column (62) is arranged at the other of the sliding mounting seat (1) and the fixed mounting seat (2); The limiting column (62) is inserted into the limiting long strip hole (611) and can move along the first direction in the limiting long strip hole (611).

7. The tensioning device according to any one of claims 1 to 3, characterized in that: The fixed mounting seat (2) comprises a first mounting portion (21) and a second mounting portion (22) connected to each other, the first mounting portion (21) being located at one end of the second mounting portion (22) along the length direction, and the first mounting portion (21) and the second mounting portion (22) being spaced apart along a second direction, the first direction being perpendicular to the second direction and both being perpendicular to the axial direction of the tensioning wheel (4); One end of the sliding mounting seat (1) is slidably inserted into the first mounting portion (21), and the protective cavity (3) is formed between the first mounting portion (21); the adjustment component (52) is adjustably arranged on the first mounting portion (21), and one end of the adjustment component (52) extends into the protective cavity (3) and abuts against one end of the elastic member (51); the second mounting portion (22) is used for fixed connection with an external mounting substrate.

8. The tensioning device according to claim 7, characterized in that: The fixed mounting seat (2) is provided with a first protective groove, which is distributed along the second direction on the outside of the first mounting portion (21) and / or the outside of the second mounting portion (22); the chain can be partially accommodated in the first protective groove.

9. The tensioning device according to claim 7, characterized in that: One of the outer peripheral wall of the sliding mounting seat (1) and the inner peripheral wall of the first mounting portion (21) is provided with a sliding groove extending in a first direction, and the other is provided with a sliding block, and the sliding block is slidably matched with the sliding groove.

10. A harvester, comprising an ear picking device, characterized in that: It also includes a tensioning wheel (4), a pulling chain, a driving wheel, and a tensioning device as described in any one of claims 1 to 9, wherein the fixed mounting seat (2) is fixedly connected to the frame of the ear picking device, the driving wheel is rotatably connected to the frame, and the pulling chain is meshed with the driving wheel and the tensioning wheel (4).

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