Rice transplanter tensioning mechanism and rice transplanter

Abstract

The utility model relates to the technical field of agricultural machinery, in particular to a rice transplanter tensioning mechanism and a rice transplanter The rice transplanter tensioning mechanism comprises a tensioning arm, one end of the tensioning arm is rotatably mounted on a tensioning arm rotating support, the other end of the tensioning arm is provided with a tensioning wheel, a detachable upper supporting rod is arranged in the middle of the tensioning arm, and a lower supporting rod is arranged below the upper supporting rod. The lower supporting rod is rotationally mounted on a lower supporting rod rotating seat, and the lower supporting rod rotating seat is mounted on a fixed seat; the lower supporting rod and the upper supporting rod are coaxially arranged, the lower supporting rod and the upper supporting rod are sleeved with the spring at the same time, and when the tensioning arm swings, the bending degree of the spring can be reduced or the spring can be effectively prevented from being bent and broken.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery, in particular to a tensioning mechanism of a rice transplanter and a rice transplanter. Background Art

[0002] During the current rice transplanting season, the rice transplanter needs to work ten hours a day. Such high-intensity work puts great pressure on the power output device of the rice transplanter and places high demands on the reliability of the tensioning mechanism.

[0003] Most of the existing tensioning mechanisms of rice transplanters are of the compression spring fixed type, and the fixing points at both ends of the compression spring are fixed, that is, both ends of the compression spring cannot move. When the tensioning arm swings, the compression spring will be twisted and bent, resulting in uneven force on the compression spring, and in severe cases, it will cause the compression spring to break.

[0004] Disadvantages of existing technology:

[0005] The existing power output device of the rice transplanter is fixed at both ends. In this structure, the spring will bend when the tensioning arm swings, resulting in uneven force on the spring. The spring may break when working for a long time, causing the vehicle to stop and affecting the operation. Utility Model Content

[0006] The utility model aims to provide a tensioning mechanism for a rice transplanter, which can reduce the bending degree of a spring or effectively avoid bending and breaking of the spring when a tensioning arm swings.

[0007] Another object of the utility model is to provide a rice transplanter, wherein the tensioning mechanism can reduce the bending degree of the spring or effectively avoid the bending and breaking of the spring when the tensioning arm swings.

[0008] The technical solution of the utility model is achieved in this way:

[0009] A tensioning mechanism for a rice transplanter, comprising a tensioning arm, one end of which is rotatably mounted on a tensioning arm rotating support, and a tensioning wheel is arranged at the other end, a detachable upper support rod is arranged in the middle of the tensioning arm, a lower support rod is arranged below the upper support rod, the lower support rod is rotatably mounted on a lower support rod rotating seat, and the lower support rod rotating seat is mounted on a fixed seat;

[0010] The lower support rod and the upper support rod are coaxially arranged, and the spring is simultaneously sleeved on the lower support rod and the upper support rod.

[0011] Furthermore, a mounting plate is provided on one side of the tensioning arm, a mounting hole is provided on the mounting plate, and the upper support rod passes through and is installed in the mounting hole.

[0012] Furthermore, a first axial limiting assembly is provided at the connection between the upper support rod and the mounting plate, and the first axial limiting assembly can limit the axial position of the upper support rod.

[0013] Further, the first axial limiting assembly includes a clamp, a concave washer and a convex washer;

[0014] A circle of clamping grooves matching the clamping hoop is formed on the upper part of the upper support rod, the clamping hoop is clamped in the clamping groove, and the size of the clamping hoop is larger than the size of the mounting hole;

[0015] The concave washer is welded on the lower surface of the mounting plate and corresponds to the mounting hole, and the convex washer is arranged on the upper support rod; or, the convex washer is welded on the lower surface of the mounting plate and corresponds to the mounting hole, and the concave washer is arranged on the upper support rod;

[0016] The convex washer is cooperatively connected with the concave washer.

[0017] Furthermore, the first axial limiting assembly also includes a movable washer, the movable washer is sleeved on the outer side of the upper support rod, and the movable washer is located between the clamp and the mounting plate.

[0018] Furthermore, the lower support rod rotating seat includes a rotating rod and a sleeve, the rotating rod is rotatably installed in the sleeve, and one end of the rotating rod is provided with a through hole for installing the lower support rod, the sleeve is fixedly connected to the fixed seat, and a second axial limit assembly is arranged on the rotating rod.

[0019] Furthermore, annular grooves are respectively provided on the rotating rod and at two ends corresponding to the sleeve;

[0020] The second axial limiting assembly includes two retaining springs, which are respectively installed in the two annular grooves to limit the axial position of the rotating rod.

[0021] Furthermore, a locking assembly is provided on the lower support rod for locking and fixing the lower support rod and the rotating rod.

[0022] Further, the axis of the through hole is perpendicular to the axis of the lower support rod;

[0023] The locking assembly includes two locking parts, which are locking nuts. The lower support rod is provided with an external thread matching the locking nut. The locking nut is connected to the lower support rod through threads, and the two locking nuts are respectively located at the two ends of the perforation.

[0024] A rice transplanter, comprising an engine base, comprising the rice transplanter tensioning mechanism;

[0025] Wherein, the fixing seat and the tensioning arm rotating support are respectively installed on the engine base.

[0026] Compared with the prior art, the beneficial effects of the utility model are:

[0027] In the present application, the spring is simultaneously mounted on the upper support rod and the lower support rod, and since the lower support rod is rotatably installed on the lower support rod rotating seat, that is, the lower support rod can rotate, then both ends of the spring are movable, and the spring and the lower support rod can rotate together with the swing of the tensioning arm, which can reduce the bending degree of the spring or effectively avoid the bending and twisting of the spring, thereby increasing the service life of the spring without affecting the normal operation of the machine body, and the overall structure of the tensioning mechanism is simple, low in cost, high in reliability, and at the same time low in overall quality, which is conducive to reducing the weight of the entire machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is an exploded view of the tensioning mechanism of the rice transplanter of the utility model;

[0030] Figure 2 It is a rear view of the tensioning mechanism of the rice transplanter of the utility model;

[0031] Figure 3 This is an exploded view of the rotating seat of the lower support rod of the utility model;

[0032] Figure 4 This is a structural schematic diagram of the lower support rod rotating seat of the utility model;

[0033] Figure 5 This is a structural schematic diagram of the utility model in which the tensioning mechanism of the rice transplanter is installed on the engine base;

[0034] Figure 6 For this utility model Figure 5 Front view of .

[0035] In the figure:

[0036] 1-tensioning arm; 101-mounting plate; 1011-mounting hole; 2-tensioning wheel; 3-spring;

[0037] 4-lower support rod; 5-clamp; 6-movable washer; 7-concave washer; 8-upper support rod; 9-convex washer; 10-lower support rod rotating seat; 1001-rotating rod; 10011-plane; 1002-sleeve; 10021-positioning shoulder; 11-tensioning arm rotating support; 12-fixed seat; 121-plate body; 122-sleeve mounting hole; 13-locking piece; 14-engine base;

[0038] 15-circlip; 16-blocking member; 17-lubricating oil nozzle. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] 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 present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model 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 a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0043] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0044] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0046] Example 1

[0047] Reference Figure 1-Figure 6 The present embodiment provides a tensioning mechanism for a rice transplanter, including a tensioning arm 1, one end of which is rotatably mounted on a tensioning arm rotating support 11, and a tensioning wheel 2 is arranged at the other end. A detachable upper support rod 8 is arranged in the middle of the tensioning arm 1, and a lower support rod 4 is arranged below the upper support rod 8. The lower support rod 4 is rotatably mounted on a lower support rod rotating seat 10, and the lower support rod rotating seat 10 is mounted on a fixed seat 12. The lower support rod rotating seat 10 and the fixed seat 12 can be mounted on an engine base 14.

[0048] The lower support rod 4 is coaxially arranged with the upper support rod 8, and the axial direction of the lower support rod 4 and the upper support rod 8 is a first direction. The spring 3 is simultaneously mounted on the lower support rod 4 and the upper support rod 8, wherein the spring 3 is preferably a compression spring.

[0049] A mounting plate 101 is disposed on one side of the tensioning arm 1 . A mounting hole 1011 is formed on the mounting plate 101 . The upper support rod 8 passes through and is mounted in the mounting hole 1011 .

[0050] Wherein, a first axial limiting assembly is provided at the connection between the upper support rod 8 and the mounting plate 101 , and the first axial limiting assembly can limit the axial position of the upper support rod 8 .

[0051] Specifically, the first axial limiting assembly includes a clamp 5 , a concave washer 7 and a convex washer 9 .

[0052] The upper portion of the upper support rod 8 is provided with a circle of slots matching the clamp 5 , the clamp 5 is clamped in the slot, and the size of the clamp 5 is larger than the size of the mounting hole 1011 .

[0053] The concave washer 7 is welded on the lower surface of the mounting plate 101 and corresponds to the mounting hole 1011, and the convex washer 9 is arranged on the upper support rod 8; or, the convex washer 9 is welded on the lower surface of the mounting plate 101 and corresponds to the mounting hole 1011, and the concave washer 7 is arranged on the upper support rod 8.

[0054] The convex washer 9 is cooperatively connected with the concave washer 7 .

[0055] A preferred implementation manner of this embodiment adopts: the concave washer 7 is welded on the lower surface of the mounting plate 101 corresponding to the mounting hole 1011 , and the convex washer 9 is provided on the upper support rod 8 .

[0056] The first axial limiting assembly further includes a movable washer 6 , which is sleeved on the outer side of the upper support rod 8 , and the movable washer 6 is located between the clamp 5 and the mounting plate 101 .

[0057] Specifically, the mounting hole 1011 is a circular hole, the concave washer 7 is welded to the lower surface of the mounting plate 101 on the tension arm 1, and the concave washer 7 is concentric with the mounting hole 1011; the convex washer 9 is welded to the upper support rod 8, the upper support rod 8 passes through the mounting hole 1011, and the top of the upper support rod 8 passes through the movable washer 6 and the clamp 5, the clamp 5 is clamped in the clamping groove of the upper support rod 8, and the upper support rod 8 is fixed to the tension arm 1 by the clamp 5. At this time, the concave washer 7 and the convex washer 9 cooperate with each other and are combined together, and the movable washer 6 can move between the clamp 5 and the mounting plate 101 of the tension arm 1. The diameter of the mounting hole 1011 should be larger than the diameter of the upper support rod 8 and smaller than the outer diameter of the movable washer 6 to ensure that the upper support rod 8 can rotate freely after installation. It should be noted that the first axial limit assembly only limits the axial position of the upper support rod 8, and does not affect the free rotation of the upper support rod 8. When the tensioning arm 1 swings, the upper support rod 8, the lower support rod 4 and the spring 3 always rotate with the tensioning arm 1 and are coaxial, which can reduce the bending degree of the spring 3 or effectively avoid the bending and breaking of the spring 3 without causing the spring 3 to twist, thereby increasing the service life of the spring 3 and not affecting the normal operation of the machine body.

[0058] The lower support rod rotating seat 10 includes a rotating rod 1001 and a second axial limiting assembly, and the fixed seat 12 includes a plate body 121, and the plate body 121 is provided with a through hole, and the rotating rod 1001 is inserted into the through hole and the rotating seat is axially limited by the second axial limiting assembly; the other end of the rotating rod 1001 is provided with a through hole, and the lower support rod 4 is inserted into the through hole and is detachably connected to the rotating rod 1001. The axial direction of the rotating rod 1001 is the second direction, and the second direction is perpendicular to the first direction.

[0059] Specifically, the lower support rod rotating seat 10 includes a rotating rod 1001 and a sleeve 1002, and the plate body 121 is provided with a sleeve mounting hole 122 along the second direction; the rotating rod 1001 is rotatably mounted in the sleeve 1002, and one end of the rotating rod 1001 is provided with a through hole for mounting the lower support rod 4, and the sleeve 1002 is installed in the sleeve mounting hole 122 and fixedly connected to the fixed seat 12. Figure 4 A positioning shoulder 10021 is provided at one end of the sleeve 1002, and the positioning shoulder 10021 is attached to and welded to the side of the plate body 121. Annular grooves are respectively provided on the rotating rod 1001 and at both ends of the sleeve 1002. The second axial limiting assembly includes two retaining springs 15, and the retaining springs 15 are respectively installed in the two annular grooves to limit the axial position of the rotating rod 1001.

[0060] Note: The circlip 15 can be replaced by a shaft elastic circlip.

[0061] In an optional implementation manner of this embodiment, a lubricating oil nozzle is provided on the rotating rod 1001 , and the lubricating oil nozzle can provide lubricating oil for the rotation of the rotating rod 1001 in the sleeve 1002 to ensure lubrication between the rotating rod 1001 and the sleeve 1002 .

[0062] The lower support rod 4 is provided with a locking assembly for locking and fixing the lower support rod 4 and the rotating rod 1001 .

[0063] The axis of the through hole is perpendicular to the axis of the lower support rod 4 .

[0064] A blocking member 16 is disposed on the lower support rod 4 . The blocking member 16 is a blocking ring or a T-shaped blocking sleeve. The blocking member 16 is fixedly or movably disposed on the lower support rod 4 . The blocking member 16 can provide support and axial limitation for the installation of the spring 3 .

[0065] The locking assembly includes two locking parts 13, which are locking nuts. The lower support rod 4 is provided with an external thread matching the locking nut. The locking nut is connected to the lower support rod 4 through a thread, and the two locking nuts are respectively located at the two ends of the perforation of the rotating rod 1001. The rotating rod 1001 is clamped by tightening the two locking nuts so that the rotating rod 1001 and the lower support rod 4 remain relatively fixed and can rotate together.

[0066] Preferably, the positions on the rotating rod 1001 that are in contact with the two nuts are cut off to form planes 10011, and the two planes 10011 are parallel to each other, and the axial direction of the lower support rod 4 is perpendicular to the two planes 10011. Then, when the two locking nuts are tightened, the locking nuts are in full contact with the planes 10011, thereby expanding the contact area between the locking nuts and the rotating rod 1001 and improving the locking effect.

[0067] Example 2

[0068] The present embodiment provides a tensioning mechanism for a rice transplanter. The difference between the present embodiment and the first embodiment is that the present embodiment uses a universal ball head assembly to replace the upper support rod 8 and the first axial limit assembly in the first embodiment.

[0069] Specifically, a mounting plate 101 is provided in the middle of the tensioning arm 1, and a detachable universal ball head assembly is provided on the mounting plate 101. The universal ball head assembly includes a ball seat and a ball rod. The ball seat is detachably mounted on the mounting plate 101 by means of a plurality of sets of bolt assemblies. The ball seat has a spherical groove, one end of the ball rod has a ball head, and the ball head of the ball rod is mounted in the spherical groove of the ball seat, and the ball head can rotate freely in the spherical groove.

[0070] A lower support rod 4 is provided below the golf club. The lower support rod 4 is rotatably mounted on a lower support rod rotating seat 10 , and the lower support rod rotating seat 10 is mounted on a fixed seat 12 .

[0071] The lower support rod 4 is coaxially arranged with the ball rod, and the spring 3 is simultaneously mounted on the lower support rod 4 and the upper support rod 8. When the tension arm 1 is swinging, the ball rod, the spring 3 and the lower support rod 4 rotate along with the swing of the tension arm 1, and the ball rod, the spring 3 and the lower support are always coaxial without causing the spring 3 to be twisted.

[0072] It should be noted that other structures of this embodiment are consistent with those in Embodiment 1 and will not be described in detail.

[0073] Example 3

[0074] The present embodiment provides a tensioning mechanism for a rice transplanter. The difference between the present embodiment and the embodiment 1 is that the present embodiment uses a universal ball head assembly to replace the upper support rod 8 and the first axial limit assembly in the embodiment 1, and uses the lower support rod rotating seat 10 structure in the embodiment 2 to replace the lower support rod rotating seat 10 structure in the embodiment 1.

[0075] Example 4

[0076] This embodiment provides a rice transplanter, including an engine base 14, and also includes the rice transplanter tensioning mechanism described in any one of Embodiments 1-4.

[0077] The fixing seat 12 and the tensioning arm rotating support 11 are respectively installed on the engine base 14 .

[0078] The tensioning arm rotating support 11 is installed on the engine base 14 through multiple sets of bolt assemblies, and the fixing base 12 is installed on the engine base 14 through multiple sets of bolt assemblies, or the fixing base 12 is welded and installed on the engine base 14.

[0079] The beneficial effects of the technical solution of the utility model are:

[0080] In the technical solution of the present application, the two ends of the spring 3 can rotate, and when the tensioning arm 1 swings, the problem of spring 3 being twisted or even broken can be effectively avoided, thereby increasing the service life of the spring 3. The normal operation of the rice transplanter will not be affected by the breakage of the spring 3, and the overall structure is simple, light in weight, and highly reliable.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

[0082] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A tensioning mechanism for a rice transplanter, comprising a tensioning arm (1) with one end rotatably mounted on a tensioning arm rotating support (11) and a tensioning wheel (2) disposed at the other end, characterized in that: A detachable upper support rod (8) is arranged in the middle of the tensioning arm (1), a lower support rod (4) is arranged below the upper support rod (8), the lower support rod (4) is rotatably mounted on a lower support rod rotating seat (10), and the lower support rod rotating seat (10) is mounted on a fixed seat (12); The lower support rod (4) and the upper support rod (8) are coaxially arranged, and the spring (3) is simultaneously sleeved on the lower support rod (4) and the upper support rod (8).

2. The tensioning mechanism of the rice transplanter according to claim 1, characterized in that: A mounting plate (101) is provided on one side of the tensioning arm (1), a mounting hole (1011) is provided on the mounting plate (101), and the upper support rod (8) passes through and is mounted in the mounting hole (1011).

3. The tensioning mechanism of the rice transplanter according to claim 2, characterized in that: A first axial limiting assembly is provided at the connection between the upper support rod (8) and the mounting plate (101), and the first axial limiting assembly is capable of axially limiting the upper support rod (8).

4. The tensioning mechanism of the rice transplanter according to claim 3, characterized in that: The first axial limiting assembly comprises a clamp (5), a concave washer (7) and a convex washer (9); The upper portion of the upper support rod (8) is provided with a circle of slots matching the clamp (5), the clamp (5) is clamped in the slot, and the size of the clamp (5) is larger than the size of the mounting hole (1011); The concave washer (7) is welded on the lower surface of the mounting plate (101) and corresponds to the mounting hole (1011), and the convex washer (9) is arranged on the upper support rod (8); or, the convex washer (9) is welded on the lower surface of the mounting plate (101) and corresponds to the mounting hole (1011), and the concave washer (7) is arranged on the upper support rod (8); The convex washer (9) is cooperatively connected with the concave washer (7).

5. The tensioning mechanism of the rice transplanter according to claim 4, characterized in that: The first axial limiting assembly further comprises a movable washer (6), the movable washer (6) being sleeved on the outer side of the upper support rod (8), and the movable washer (6) being located between the clamp (5) and the mounting plate (101).

6. The tensioning mechanism of the rice transplanter according to claim 1, characterized in that: The lower support rod rotating seat (10) comprises a rotating rod (1001) and a sleeve (1002), wherein the rotating rod (1001) is rotatably mounted in the sleeve (1002), and a through hole for mounting the lower support rod (4) is provided at one end of the rotating rod (1001), the sleeve (1002) is fixedly connected to the fixed seat (12), and a second axial limit assembly is provided on the rotating rod (1001).

7. The tensioning mechanism of the rice transplanter according to claim 6, characterized in that: Annular grooves are respectively provided on the rotating rod (1001) and at two ends corresponding to the sleeve (1002); The second axial limiting assembly comprises two retaining springs (15), and the retaining springs (15) are respectively installed in the two annular grooves to limit the axial position of the rotating rod (1001).

8. The tensioning mechanism of the rice transplanter according to claim 6, characterized in that: The lower support rod (4) is provided with a locking assembly for locking and fixing the lower support rod (4) and the rotating rod (1001).

9. The tensioning mechanism of the rice transplanter according to claim 8, characterized in that: The axis of the through hole is perpendicular to the axis of the lower support rod (4); The locking assembly comprises two locking members (13), wherein the locking members (13) are locking nuts, and the lower support rod (4) is provided with an external thread matching the locking nut. The locking nut is connected to the lower support rod (4) by threads, and the two locking nuts are respectively located at two ends of the through hole.

10. A rice transplanter, comprising an engine base (14), characterized in that: It comprises the tensioning mechanism of the rice transplanter according to any one of claims 1 to 9; Wherein, the fixing seat (12) and the tensioning arm rotating support (11) are respectively installed on the engine base (14).

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