CN210978414U

CN210978414U - Belt tensioning device and rice transplanter comprising same

Info

Publication number: CN210978414U
Application number: CN201922053166.0U
Authority: CN
Inventors: 孙宽良; 李玉彪; 刘文忠; 张琨; 刘然
Original assignee: Lovol Heavy Industry Co Ltd
Current assignee: Weichai Lovol Intelligent Agricultural Technology Co Ltd
Priority date: 2019-11-25
Filing date: 2019-11-25
Publication date: 2020-07-10
Anticipated expiration: 2029-11-25

Abstract

The utility model discloses a belt overspeed device tensioner and contain its transplanter belongs to mechanical belt drive technical field. The belt tensioning device comprises a tensioning wheel, a tensioning adjusting mechanism for adjusting the position of the tensioning wheel, a swinging arm and a swinging arm supporting seat; the tensioning wheel is rotationally connected to the fixed shaft, the swing arm supporting seat is fixedly arranged, one end of the swing arm is rotationally connected to the swing arm supporting seat, and the other end of the swing arm is fixedly connected with the fixed shaft of the tensioning wheel; one end of the tensioning adjusting mechanism is connected with the fixed shaft of the tensioning wheel; the tensioning wheel is used for tensioning the belt, the belt is wound on at least two driving wheels, the tensioning wheel is located between two adjacent driving wheels, the tensioning adjusting mechanism and the swinging arm limit the position of the tensioning wheel together, and the tensioning wheel is tightly attached to one side of the loose edge of the belt and tensions the belt. Through the utility model discloses a belt tightener comes to carry out the tensioning to the belt, has avoided causing the damage to the machine because tensioning adjustment mechanism damages suddenly, safe and reliable.

Description

Belt tensioning device and rice transplanter comprising same

Technical Field

The utility model relates to a mechanical belt drive technical field especially relates to a belt overspeed device tensioner and contain its transplanter.

Background

Belt drives are a common type of mechanical drive and require re-tensioning of the belt by a tensioner in order to provide adequate tensioning of the belt. At present, a tension mode of re-tensioning a belt generally adopts a pressure spring structure mode, namely, a pressure spring is arranged below a tension wheel, the upper end of the pressure spring is propped against a tension arm, and the lower end of the pressure spring is fixed on an engine base; or a tension spring structure mode is adopted, namely, the tension spring is arranged above the tension wheel, the upper end of the tension spring is fixed on the engine back plate, and the lower end of the tension spring is connected on the tension wheel shaft. However, the structure of the pressure spring is limited by the engine base, and if the engine base is changed, the mode is difficult to realize; in addition, the tension spring structure is influenced by the type and the material of the spring, the service life is shorter, the normal work of the equipment is influenced once the tension spring structure is damaged and cannot be replaced in time, and the tension adjusting mechanism can be damaged suddenly, so that the tensioning degree of a belt is greatly fluctuated, and the machine is damaged due to the fact that the machine generates larger vibration. Thus, a need exists for a safe and reliable belt tensioner.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome at least one of the defects of the prior art and provide a safe and reliable belt tensioning device; in addition, a rice transplanter is also provided.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a belt tensioning device comprises a tensioning wheel, a tensioning adjusting mechanism for adjusting the position of the tensioning wheel, a swinging arm and a swinging arm supporting seat; the tensioning wheel is rotationally connected to the fixed shaft, the swing arm supporting seat is fixedly arranged, one end of the swing arm is rotationally connected to the swing arm supporting seat, and the other end of the swing arm is fixedly connected with the fixed shaft of the tensioning wheel;

one end of the tensioning adjusting mechanism is fixed, and the other end of the tensioning adjusting mechanism is connected with the fixed shaft of the tensioning wheel; the tensioning wheel is used for tensioning the belt, the belt is wound on at least two driving wheels, the tensioning wheel is located between two adjacent driving wheels, the tensioning adjusting mechanism and the swinging arm limit the position of the tensioning wheel together, and the tensioning wheel is tightly attached to one side of the loose edge of the belt and tensions the belt.

The utility model has the advantages that: the swing arm supporting seat is fixedly arranged, one end of the swing arm is rotatably connected to the swing arm supporting seat, and the other end of the swing arm is fixedly connected with the fixed shaft of the tension wheel, so that the tension wheel can swing relative to the swing arm supporting seat; in addition, one end of the tensioning adjusting mechanism is connected with the fixed shaft of the tensioning wheel, and the position of the tensioning wheel is adjusted by adjusting the tensioning adjusting mechanism, so that the tensioning degree of the tensioning wheel on the belt is changed, the normal work of the belt is facilitated, the transmission reliability of the belt is improved, and the service life of the belt is prolonged. Furthermore, the tensioning adjusting mechanism and the swing arm limit the position of the tensioning wheel together, when the tensioning adjusting mechanism is partially damaged and weakened or loses adjusting effect and cannot be replaced in time, the tensioning wheel is still supported and limited by the swing arm, so that the movement range of the tensioning wheel is limited, the tensioning wheel can still continue to tension the belt, and damage to the machine due to larger fluctuation of the tensioning degree of the belt caused by sudden damage of the tensioning adjusting mechanism is avoided. Therefore, the utility model discloses a belt tightener has better reliability, can improve the life of belt, and has avoided because tensioning adjustment mechanism damages suddenly and makes the tensioning degree of belt have great fluctuation and arouse that the machine produces great vibration and cause the damage to the machine, safe and reliable.

In addition, on the basis of the technical scheme, the utility model discloses can also make following improvement, can also have following additional technical feature.

According to an embodiment of the present invention, the tensioning adjustment mechanism includes an adjustment rod, an elastic component, a support seat, a limit baffle and an adjustment component, the support seat is fixedly disposed, a through hole for the adjustment rod to pass through is disposed on the support seat, the size of the through hole is larger than the cross-sectional size of the adjustment rod, one end of the adjustment rod passes through the through hole on the support seat and is connected to one end of a fixed shaft of the tensioning wheel, the other end of the adjustment rod is a free end, the adjustment rod can move up and down in the through hole and swings along with the swing arm in the through hole, the limit baffle is sleeved on the free end of the adjustment rod, and the adjustment component is connected to the free end of the adjustment rod and is used for adjusting and limiting the position of the limit baffle;

the elastic component is sleeved on the adjusting rod and located between the supporting seat and the limiting baffle, when the belt moves on the driving wheel and the tensioning wheel, the tensioning wheel is tensioned by the belt to drive the adjusting rod to move, so that the elastic component generates elastic deformation and enables the swinging arm to rotate, the adjusting rod and the swinging arm limit the position of the tensioning wheel together, and the tensioning wheel is tightly attached to one side of the loose edge of the belt and tensions the belt.

One end of an adjusting rod penetrates through the supporting seat and is connected with one end of a fixing shaft of the tensioning wheel, the other end of the adjusting rod is a free end, and an elastic component is sleeved on the adjusting rod and is located between the supporting seat and the adjusting component. When the belt moves on the driving wheel and the tensioning wheel, the adjusting rod and the swinging arm dynamically limit the position of the tensioning wheel together, so that the tensioning wheel is tightly attached to one side of the loose edge of the belt at any time and tensions the belt, the normal work of the belt is facilitated, the transmission reliability of the belt is improved, and the service life of the belt is prolonged. In addition, the adjusting rod and the swing arm limit the position of the tensioning wheel together, when the elastic component is damaged and cannot be replaced in time, the tensioning wheel is still supported and limited by the swing arm, so that the movement range of the tensioning wheel is limited, the tensioning wheel can still continue to tension the belt, the reliability of the belt tensioning device for tensioning the belt is improved, and the phenomenon that the use of a machine is influenced due to the fact that the tensioning degree of the belt is greatly fluctuated due to sudden damage of the elastic component is avoided. Furthermore, the adjusting part is connected to the free end of the adjusting rod, the position of the limiting baffle is adjusted and limited through the adjusting part, the position of the limiting baffle can be changed through the adjusting part, and the tensioning force of the tensioning wheel to the belt can be changed by adjusting the positions of the adjusting rod and the tensioning wheel.

According to an embodiment of the present invention, the adjusting rod is vertically disposed, and the adjusting rod passes through the supporting seat and has a lower end rotatably connected to one end of the fixing shaft of the tensioning wheel; the swing arm supporting seat is fixedly arranged below the adjusting rod, and the tensioning wheel is tightly attached to the lower side of the loose edge of the belt. Through with the fixed setting of swing arm supporting seat the below of adjusting the pole is favorable to rotating on swing arm supporting seat and sets up the swing arm to connect the take-up pulley in the position between swing arm supporting seat and the regulation pole, be favorable to carrying out the tensioning to the belt that sets up between swing arm supporting seat and regulation pole.

According to the utility model discloses an embodiment, be equipped with the external screw thread on the free end of regulation pole, adjusting part is adjusting nut and is located limit baffle's top, adjusting nut with external screw thread adaptation threaded connection. The adjusting nut is in threaded connection with the external thread in a matched mode, the nut is rotated towards the end portion close to or far away from the free end, and under the effect of the elastic component, the adjusting rod drives the tensioning wheel to move close to or far away from the supporting seat.

According to an embodiment of the invention, the resilient member is a spring. The spring is adopted as the elastic component, the spring sleeve is conveniently sleeved on the adjusting rod, and the spring has good elasticity, so that the adjusting rod and the tensioning can be adjusted conveniently. Furthermore, the spring sets up between supporting seat and limit baffle, adjusts the position of take-up pulley through the compression deformation of spring, belongs to the pressure spring structure, and the allowable limit stress of pressure spring is higher than the extension spring, and does not have the dangerous cross-section of shackle department, and life is longer than the extension spring, is favorable to improving adjustment mechanism's life.

According to an embodiment of the utility model, the belt tightener still includes the mounting panel, swing arm supporting seat with supporting seat fixed connection is in on the mounting panel. Through with swing arm supporting seat with supporting seat fixed connection is in on the mounting panel, be convenient for fixed swing arm supporting seat and supporting seat are favorable to rotating the swing arm and connect on swing arm supporting seat, also are favorable to carrying out the spacing of week side direction to the regulating stem.

According to an embodiment of the present invention, the mounting plate is an engine back plate, on which an engine is mounted; the belt is wound on the two driving wheels, the two driving wheels are respectively a driving wheel and a driven wheel, the driving wheel is in transmission connection with an output shaft of the engine, and the driven wheel is arranged in parallel with the driving wheel. The engine back plate is used as the mounting plate, so that the swing arm supporting seat and the supporting seat can be fixedly connected to the engine back plate when the engine is mounted by the engine back plate.

According to the utility model discloses an embodiment, the swing arm pass through the rotator with swing arm supporting seat rotates to be connected, rotator fixed connection is in on the swing arm supporting seat, the swing arm rotates to be connected on the rotator. The swing arm is rotatably connected with the swing arm supporting seat through the rotating body, so that the reliability of the swing arm relative to the swing arm supporting seat is ensured.

According to an embodiment of the present invention, the rotating body includes a body, a bushing, a rotating sleeve, a retainer ring, a seal ring, a pressing bolt and a lubricating nozzle, the body is a stepped cylindrical structure, one end of the body is fixedly connected to the swing arm supporting seat, the bushing is sleeved on the body, the rotating sleeve is rotatably sleeved on the outside of the bushing, the retainer ring is fixedly connected to the other end of the body through the pressing bolt and limits the rotating sleeve on the body, and the swing arm is fixedly connected to the outside of the rotating sleeve; the lubricating device is characterized in that two ends of the rotary sleeve extend out of the bushing, the sealing rings are arranged between the inner side walls at two ends of the rotary sleeve and the body respectively, a lubricating cavity is formed between the two sealing rings in a limited mode, the lubricating oil nozzle is arranged on the compression bolt, through holes communicated with the lubricating cavity are formed in the compression bolt and the body, and the lubricating oil nozzle is communicated with the lubricating cavity through the through holes. Through with swing arm fixed connection in the outside of swivel sleeve, the inside wall at swivel sleeve both ends with be equipped with respectively between the body the sealing washer, two inject between the sealing washer and form lubricated cavity, and be equipped with on clamp bolt lubricating nipple is favorable to lubricating oil to lubricating cavity internal input, ensures the relative swing arm supporting seat wobbling reliability of swing arm.

In addition, the rice transplanter provided by the embodiment comprises a rice seedling feeding mechanism, a rice seedling separating and transplanting mechanism, a frame, a rice seedling box, a traveling device, a bearing floating body and the belt tensioning device. The belt tensioning device is arranged on the rice transplanter, the belt is tensioned through the belt tensioning device, the tensioning adjusting mechanism and the swing arm limit the position of the tensioning wheel together, when the tensioning adjusting mechanism is partially damaged and weakened or loses adjusting effect and cannot be replaced in time, the tensioning wheel is still supported and limited by the swing arm, so that the movement range of the tensioning wheel is limited, the tensioning wheel can still continue to tension the belt, and damage to the rice transplanter due to the fact that the rice transplanter generates large vibration and the rice transplanter is damaged due to the fact that the tensioning degree of the belt fluctuates greatly due to sudden damage of the tensioning adjusting mechanism is avoided.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic view of an overall structure of a belt tensioner according to an embodiment of the present invention;

FIG. 2 is a left side view of FIG. 1;

fig. 3 is a schematic structural view of a rotating body according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a tension pulley according to an embodiment of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. tensioning adjustment mechanism, 2, swing arm supporting seat, 3, swing arm, 4, tensioning wheel, 5, belt, 6, engine backplate, 7, fixing base, 8, supporting seat, 9, rotator, 10, adjusting rod, 11, adjusting nut, 12, limit baffle, 13, spring, 40, fixed axle, 41, wheel body, 42, bearing, 43, first sealing element, 44, second sealing element, 45, stop ring, 46, first lubricating oil nozzle, 90, body, 91, bush, 92, rotary sleeve, 93, retaining ring, 94, gasket, 95, wave-shaped elastic pad, 96, first sealing element, 97, second sealing element, 98, compression bolt, 99 and second lubricating oil nozzle.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

The disclosed embodiment provides a belt tensioning device, as shown in fig. 1 to 4, comprising a tensioning wheel 4, a tensioning adjusting mechanism 1 for adjusting the position of the tensioning wheel 4, a swing arm 3 and a swing arm supporting seat 2; the tensioning wheel 4 is rotatably connected to the fixed shaft 40, the swing arm supporting seat 2 is fixedly arranged, one end of the swing arm 3 is rotatably connected to the swing arm supporting seat 2, and the other end of the swing arm is fixedly connected with the fixed shaft 40 of the tensioning wheel 4; one end of the tensioning adjusting mechanism 1 is connected with a fixed shaft 40 of the tensioning wheel 4; the tensioning wheel 4 is used for tensioning the belt 5, the belt 5 is wound on at least two driving wheels, the tensioning wheel 4 is located between two adjacent driving wheels, the tensioning adjusting mechanism 1 and the swing arm 3 limit the position of the tensioning wheel 4 together, and the tensioning wheel 4 is enabled to be attached to one side of the loose edge of the belt and tension the belt 5.

In the embodiment of the present disclosure, as shown in fig. 1 and fig. 2, the swing arm support base 2 is fixedly disposed, one end of the swing arm 3 is rotatably connected to the swing arm support base 2, and one end of the swing arm 3 is fixedly connected to the fixed shaft 40 of the tension pulley 4, so that the tension pulley 4 can swing relative to the swing arm support base 2; in addition, one end of the tensioning adjusting mechanism 1 is connected with the fixed shaft 40 of the tensioning wheel 4, and the position of the tensioning wheel 4 is adjusted by adjusting the tensioning adjusting mechanism 1, so that the tensioning degree of the tensioning wheel 4 on the belt 5 is changed. Further, because the tensioning adjusting mechanism 1 and the swing arm 3 limit the position of the tensioning wheel 4 together, when the tensioning adjusting mechanism 1 is partially damaged and weakened or loses the adjusting function and cannot be replaced in time, the tensioning wheel 4 is still supported and limited by the swing arm 3, so that the movement range of the tensioning wheel 4 is limited, the tensioning wheel 4 can still continue to tension the belt 5, and damage to the machine due to larger vibration of the machine caused by larger fluctuation of the tensioning degree of the belt 5 due to sudden damage of the tensioning adjusting mechanism 1 is avoided.

An embodiment of the utility model, as shown in fig. 1, fig. 2, tensioning adjustment mechanism 1 includes adjusting pole 10, an elastic component, supporting seat 8, limit baffle 12 and adjusting part, supporting seat 8 is fixed to be set up, be equipped with the through-hole that is used for supplying adjusting pole 10 to pass on supporting seat 8, the size of through-hole is greater than the cross-sectional dimension of adjusting pole 10, the one end of adjusting pole 10 passes the through-hole on supporting seat 8 and is connected with the one end of the fixed axle 40 of take-up pulley 4, the other end of adjusting pole 10 is the free end, adjust pole 10 can move up and down in the through-hole and swing along with swing arm 3 in the through-hole, limit baffle 12 cover is established on the free end of adjusting pole 10, adjusting part connects on the free end of adjusting pole 10, be; elastic component cover is established on adjusting pole 10 and is located between supporting seat 8 and limit baffle 12, and when belt 5 moved on drive wheel and take-up pulley 4, take-up pulley 4 received the tensile force of belt 5 and driven and adjust pole 10 motion, made elastic component produce elastic deformation and make swing arm 3 rotate, adjusted pole 10 and swing arm 3 restrict the position of take-up pulley 4 jointly for take-up pulley 4 pastes tightly in the one side of belt pine limit and carries out the tensioning to belt 5.

In the embodiment of the present disclosure, one end of the adjusting rod 10 passes through the supporting seat 8 and is connected to one end of the fixing shaft 40 of the tension wheel 4, the other end of the adjusting rod 10 is a free end, and the elastic member is sleeved on the adjusting rod 10 and is located between the supporting seat 8 and the adjusting member. When the belt 5 moves on the driving wheel and the tensioning wheel 4, the position of the tensioning wheel 4 is dynamically limited by the adjusting rod 10 and the swinging arm 3 together, so that the tensioning wheel 4 is tightly attached to one side of the loose edge of the belt at any time and tensions the belt 5, the normal work of the belt 5 is facilitated, the driving reliability of the belt 5 is improved, and the service life of the belt 5 is prolonged. In addition, because the adjusting rod 10 and the swing arm 3 limit the position of the tension pulley 4 together, when the elastic component is damaged and cannot be replaced in time, the tension pulley 4 is still supported and limited by the swing arm 3, so that the movement range of the tension pulley 4 is limited, the tension pulley 4 can still continue to tension the belt 5, the reliability of the belt tensioning device for tensioning the belt 5 is improved, and the problem that the use of the machine is influenced due to the fact that the tension degree of the belt 5 fluctuates greatly because of sudden damage of the elastic component to cause larger vibration of the machine is avoided. Furthermore, the adjusting part is connected to the free end of the adjusting rod 10, the position of the limit baffle 12 is adjusted and limited by the adjusting part, the position of the limit baffle 12 can be changed by the adjusting part, and the tensioning force of the tensioning wheel 4 on the belt 5 can be changed by adjusting the positions of the adjusting rod 10 and the tensioning wheel 4. Specifically, the "dynamic state" refers to that the position of the tension pulley 4 is adjusted by adjusting the lever 10 and the swing arm 3 to adapt to the slack of the belt 5 at all times, the slack of the belt 5 changes, and the position of the tension pulley 4 also changes; for example, when the tension pulley 4 is pressed downward, the tension pulley 4 is acted by the swing arm 3, the swing arm 3 swings clockwise in an arc relative to the swing arm support base 2, and the adjustment rod 10 swings in the through hole along with the swing arm 3 while moving downward.

In the embodiment of the present disclosure, as shown in fig. 2, the swing arm 3 of the present embodiment has an arc-shaped plate structure, one end of the swing arm 3 is pivotally connected to the swing arm supporting base 2, and the other end of the swing arm 3 is fixedly connected to one end of the fixed shaft 40 of the tension pulley 4. further, the supporting base 8 of the present embodiment has an L-shaped structure, and specifically includes a vertical portion and a horizontal portion that are vertically connected to each other, a through hole for passing the adjusting rod 10 is formed in the horizontal portion of the supporting base 8, and the lower end of the adjusting rod 10 passes through the through hole and is fixedly connected to the other end of the fixed shaft 40 of the tension pulley 4. further, the adjusting rod 10 of the present embodiment has a cylindrical structure, and in.

In the embodiment of the present disclosure, the tensioning adjusting mechanism 1 is used to adjust the position of the tensioning wheel 4, the tensioning adjusting mechanism 1 may be set to other structures besides the above structure of the embodiment, and the tensioning adjusting mechanism 1 can drive the tensioning wheel 4 and make the tensioning wheel 4 cling to one side of the slack side of the belt at all times and tension the belt 5. The belt 5 of the present embodiment is a V-belt, but may be a belt having another structure.

In this embodiment, as shown in fig. 4, the fixed shaft 40 is a stepped cylindrical structure, the tension pulley 4 includes a pulley body 41, a bearing 42 and sealing elements, the bearing 42 is sleeved on the small-diameter end of the fixed shaft 40, the pulley body 41 is sleeved on the bearing 42, the two sides of the pulley body 41 are respectively provided with a sealing element, and the sealing elements are respectively a first sealing element 43 and a second sealing element 44. Further, in the present embodiment, a mounting hole is formed in the wheel body 41, the mounting hole has a stepped hole structure, one end of the wheel body 41 is a large hole end, the other end of the wheel body 41 is a small hole end, the bearing 42 is mounted in the wheel body 41 from the large hole end of the wheel body 41, the first sealing element 43 is mounted in the large hole end of the bearing 42 from the wheel body 41, and the second sealing element 44 is mounted in the small hole end of the bearing 42 from the wheel body 41. Further, in this embodiment, the tension pulley 4 further includes a blocking ring 45, the blocking ring 45 is installed at the large hole end of the pulley body 41, and the blocking ring 45 is located between the bearing 42 and the first sealing element 43 and is attached to the end surface of the bearing 42; an oil seal cavity is formed between the second sealing element 44 arranged at the small hole end of the wheel body 41 and the first sealing element 43 and the blocking ring 45 arranged at the large hole end of the wheel body 41, and the bearing 42 is sealed through oil seal. Further, a first lubricating oil nozzle 46 is provided on the end surface of the end of the fixed shaft 40 connected to the swing arm 3 in the present embodiment, the first lubricating oil nozzle 46 is screwed to the end of the fixed shaft 40, and the fixed shaft 40 is provided with a through hole communicating with the oil seal cavity at the position where the first lubricating oil nozzle 46 is provided, and the first lubricating oil nozzle communicates with the oil seal cavity through the through hole.

In an embodiment of the present invention, as shown in fig. 1 and 2, the adjusting rod 10 is vertically disposed, the adjusting rod 10 passes through the supporting seat 8, and the lower end of the adjusting rod is rotatably connected to one end of the fixing shaft 40 of the tensioning wheel 4; the swing arm supporting seat 2 is fixedly arranged below the adjusting rod 10, and the tensioning wheel 4 is tightly attached to the lower side of the loose edge of the belt. This disclosed embodiment is favorable to rotating on swing arm supporting seat 2 and setting up swing arm 3 through the fixed below that sets up at regulation pole 10 with swing arm supporting seat 2 to connect the position between swing arm supporting seat 2 and regulation pole 10 with take-up pulley 4, be favorable to tensioning the belt 5 that sets up between swing arm supporting seat 2 and regulation pole 10. The adjusting rod 10 in this embodiment can rotate around the fixed shaft 40, and the adjusting rod 10 cannot move up and down around the fixed shaft 40. Further, the "belt loose edge" in this embodiment is an edge of the belt 5 exiting from the driving wheel, the driving wheel shown in fig. 1 of this embodiment is installed on the left side of the adjusting rod 10, the belt 5 is driven counterclockwise, and the lower side edge of the belt 5 is the belt loose edge.

The utility model discloses an embodiment, as shown in fig. 1, fig. 2, be equipped with the external screw thread on adjusting the free end of pole 10, adjusting part is adjusting nut 11 and is located limit baffle 12's top, adjusting nut 11 and external screw thread adaptation threaded connection. According to the embodiment of the disclosure, the adjusting nut 11 is in adaptive threaded connection with the external thread, the adjusting nut 11 is rotated towards the end part close to or far away from the free end, and the adjusting rod 10 drives the tensioning wheel 4 to move close to or far away from the supporting seat 8 under the action of the elastic component. Further, the adjusting nuts 11 in this embodiment are provided in two.

In an embodiment of the present invention, as shown in fig. 1 and 2, the elastic member is a spring 13. This disclosed embodiment adopts spring 13 as elastomeric element, is convenient for establish spring 13 cover on adjusting lever 10, and spring 13 has good elasticity, is favorable to adjusting lever 10 and tensioning. Further, this disclosed embodiment sets up spring 13 between supporting seat 8 and limit baffle 12, adjusts the position of take-up pulley 4 through the compression deformation of spring 13, belongs to the pressure spring structure, and the allowable limit stress of pressure spring is higher than the extension spring, and does not have the dangerous cross-section of shackle department, and life is longer than the extension spring, is favorable to improving adjustment mechanism's life.

The utility model discloses an embodiment, as shown in fig. 1, fig. 2, belt tensioner still includes the mounting panel, and swing arm supporting seat 2 and supporting seat 8 fixed connection are on the mounting panel. This disclosed embodiment is through with swing arm supporting seat 2 and supporting seat 8 fixed connection on the mounting panel, is convenient for fixed swing arm supporting seat 2 and supporting seat 8, is favorable to rotating swing arm 3 and connects on swing arm supporting seat 2, also is favorable to carrying out the spacing of week side direction to adjusting lever 10. Further, one side fixedly connected with fixing base 7 of the mounting panel of this disclosed embodiment, the vertical portion fixed connection of supporting seat 8 is on fixing base 7, and when adjusting pole 10 in this embodiment was vertical, the vertical fixed connection of supporting seat 8 was on fixing base 7.

In an embodiment of the present invention, as shown in fig. 1 and 2, the mounting plate is an engine back plate 6, and an engine is mounted on the engine back plate 6; the belt 5 is wound on two driving wheels, the two driving wheels are respectively a driving wheel and a driven wheel, the driving wheel is in transmission connection with an output shaft of the engine, and the driven wheel is arranged in parallel with the driving wheel. The engine backboard 6 is adopted as the mounting plate in the embodiment of the disclosure, so that the swing arm support seat 2 and the support seat 8 can be fixedly connected to the engine backboard 6 when the engine is mounted on the engine backboard 6. The engine, the driving wheels, and the driven wheels in this embodiment are not shown. In this embodiment, the driving wheel is installed on the left side of the adjusting rod 10, the driven wheel is installed on the right side of the adjusting rod 10, the belt 5 in this embodiment is driven counterclockwise, and the side of the lower side of the belt 5 is a loose side. In addition, in the specific arrangement of the belt tensioner in the present embodiment, the installation positions of the adjusting rod 10, the swing arm support base 2 and the support base 8 can be adjusted according to actual needs, so that the tension pulley 4 tensions the loose edge of the belt 5.

In an embodiment of the present invention, as shown in fig. 2 and 3, the swing arm 3 is rotatably connected to the swing arm support base 2 through the rotating body 9, the rotating body 9 is fixedly connected to the swing arm support base 2, and the swing arm 3 is rotatably connected to the rotating body 9. The swing arm 3 in the embodiment of the present disclosure is rotatably connected to the swing arm support base 2 through the rotating body 9, which is beneficial to ensure the reliability of the swing arm 3 relative to the swing arm support base 2. Further, the swing arm 3 in this embodiment may be pivotally connected to the swing arm support base 2 in other manners.

In an embodiment of the present invention, as shown in fig. 3, the rotating body 9 includes a body 90, a bushing 91, a rotating sleeve 92, a retainer ring 93, a seal ring, a pressing bolt 98 and a lubricating nozzle, the body 90 is a stepped cylindrical structure, one end of the body 90 is fixedly connected to the swing arm support seat 2, the bushing 91 is sleeved on the body 90, the rotating sleeve 92 is rotatably sleeved on the outside of the bushing 91, the retainer ring 93 is fixedly connected to the other end of the body 90 through the pressing bolt 98 and limits the rotating sleeve 92 on the body 90, and the swing arm 3 is fixedly connected to the outside of the rotating sleeve 92; outside bushing 91 extends from the both ends of swivel sleeve 92, and be equipped with the sealing washer between the inside wall at swivel sleeve 92 both ends and the body 90 respectively, inject between two sealing washers and form lubricated cavity, be equipped with lubricating nipple on the clamp bolt 98, the inside of clamp bolt 98 and body 90 all is equipped with the through-hole with lubricated cavity intercommunication, lubricating nipple passes through-hole and lubricated cavity intercommunication. This disclosed embodiment is through with swing arm 3 fixed connection in the outside of swivel sleeve 92, is equipped with the sealing washer between the inside wall at swivel sleeve 92 both ends and the body 90 respectively, inject between two sealing washers and form lubricated cavity, and be equipped with the lubricating nipple on clamp bolt 98, be favorable to lubricating oil to lubricating the cavity interior input, ensure the swing reliability of swing arm 3 relative swing arm supporting seat 2.

In the present embodiment, as shown in fig. 3, the body 90 has a stepped cylindrical structure, one end of the body 90 is a small-diameter end, the other end is a large-diameter end, the small-diameter end of the body 90 has two steps, and the large-diameter end has one step; the large-diameter end of the body 90 is fixedly connected with the swing arm support base 2 in a rotating manner. The small-diameter end of the body 90 has two steps, which are a first step and a second step in sequence from the small-diameter end to the large-diameter end, and the diameter of the second step is larger than that of the first step; the bushing 91 is fitted over the first step of the body 90. Further, in the present embodiment, two ends of the rotary sleeve 92 are open, and a convex ring protruding from the inner wall of the rotary sleeve 92 is disposed on the inner wall of the rotary sleeve 92, and when the rotary sleeve 92 is installed outside the rotary sleeve 92, the convex ring of the rotary sleeve 92 is connected to the bushing 91.

In this embodiment, as shown in fig. 3, the rotating body 9 further includes a washer and a wave-shaped spring washer 95, the washer is disposed on the end surface of the rotating sleeve 92 close to the first step of the body 90, the wave-shaped spring washer 95 is disposed on the outer side of the washer, and the retainer ring 93 is fixedly connected to the end surface of the first step of the body 90 by a pressing bolt 98. Further, the seal rings in this embodiment include a first seal ring 96 and a second seal ring 97. When the rotating sleeve 92 is connected to the bushing 91, an opening of the rotating sleeve 92 close to the large-diameter end of the body 90 abuts against a second step of the body 90, an installation cavity for installing a first sealing ring 96 is formed between the rotating sleeve 92 and the first step of the body 90 on one side of the end face of the first step close to the body 90, and the first sealing ring 96 is installed in the installation cavity in an adaptive mode; the second sealing ring 97 in this embodiment is of an O-shaped structure, a mounting groove for mounting the second sealing ring 97 is formed in the side surface of the second step of the body 90, and the second sealing ring 97 is mounted in the mounting groove. In addition, a lubricating cavity is defined between the first sealing ring 96 and the second sealing ring 97. Further, a second lubricating oil nozzle 99 is further arranged on the pressing bolt 98, in addition, the second lubricating oil nozzle 99 is specifically adopted as the lubricating oil nozzle in the embodiment, and the second lubricating oil nozzle 99 is in threaded connection with the pressing bolt 98.

In addition, the rice transplanter provided by the embodiment comprises a rice seedling feeding mechanism, a rice seedling separating and transplanting mechanism, a frame, a rice seedling box, a traveling device, a bearing floating body and the belt tensioning device. According to the embodiment of the disclosure, the belt tensioning device is arranged on the rice transplanter, the belt 5 is tensioned through the belt tensioning device, the tensioning adjusting mechanism 1 and the swing arm 3 limit the position of the tensioning wheel 4 together, when the tensioning adjusting mechanism 1 is partially damaged and weakened or loses the adjusting effect and cannot be replaced in time, the tensioning wheel 4 is still supported and limited by the swing arm 3, so that the movement range of the tensioning wheel 4 is limited, the tensioning wheel 4 can still continue to tension the belt 5, and the phenomenon that the rice transplanter is damaged due to the fact that the rice transplanter generates large vibration and the rice transplanter generates large vibration due to the fact that the tensioning degree of the belt 5 fluctuates due to sudden damage of the tensioning adjusting mechanism 1 is avoided, and the rice transplanter is safe and reliable.

Specifically, in the present embodiment, the swing arm support base 2 is fixedly disposed, one end of the swing arm 3 is pivotally connected to the swing arm support base 2, and one end of the swing arm 3 is fixedly connected to the fixed shaft 40 of the tension pulley 4, so that the tension pulley 4 can swing relative to the swing arm support base 2; in addition, one end of the tensioning adjusting mechanism 1 is fixed, the other end of the tensioning adjusting mechanism 1 is connected with the fixing shaft 40 of the tensioning wheel 4, and the position of the tensioning wheel 4 is adjusted by adjusting the tensioning adjusting mechanism 1, so that the tensioning degree of the tensioning wheel 4 on the belt 5 is changed, the normal work of the belt 5 is facilitated, the transmission reliability of the belt 5 is improved, and the service life of the belt 5 is prolonged. Further, because the tensioning adjusting mechanism 1 and the swing arm 3 limit the position of the tensioning wheel 4 together, when the tensioning adjusting mechanism 1 is partially damaged and weakened or loses the adjusting function and cannot be replaced in time, the tensioning wheel 4 is still supported and limited by the swing arm 3, so that the movement range of the tensioning wheel 4 is limited, the tensioning wheel 4 can still continue to tension the belt 5, and damage to the machine due to larger vibration of the machine caused by larger fluctuation of the tensioning degree of the belt 5 due to sudden damage of the tensioning adjusting mechanism 1 is avoided. Therefore, the belt tensioning device of the embodiment has better reliability, can prolong the service life of the belt 5, and avoids the damage to the machine caused by the larger fluctuation of the tensioning degree of the belt 5 due to the sudden damage of the tensioning adjusting mechanism 1.

In addition, except the technical scheme that this disclosed embodiment discloses, to engine, transplanter, action wheel, follow driving wheel and lubricating-oil nozzle etc. in the utility model can refer to this technical field's conventional technical scheme, and these conventional technical scheme also are not the utility model discloses the key point, the utility model discloses do not state in detail here.

In the present application, the term "plurality" means two or more unless expressly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A belt tensioner is characterized by comprising a tension wheel (4), a tension adjusting mechanism (1) for adjusting the position of the tension wheel (4), a swing arm (3) and a swing arm supporting seat (2); the tensioning wheel (4) is rotatably connected to a fixed shaft (40), the swing arm supporting seat (2) is fixedly arranged, one end of the swing arm (3) is rotatably connected to the swing arm supporting seat (2), and the other end of the swing arm is fixedly connected with the fixed shaft (40) of the tensioning wheel (4);

one end of the tensioning adjusting mechanism (1) is connected with a fixed shaft (40) of the tensioning wheel (4); the tensioning wheel (4) is used for tensioning the belt (5), the belt (5) is wound on at least two transmission wheels, the tensioning wheel (4) is located between two adjacent transmission wheels, the tensioning adjusting mechanism (1) and the swing arm (3) limit the position of the tensioning wheel (4) together, and the tensioning wheel (4) is tightly attached to one side of the loose edge of the belt (5) and tensions the belt (5).

2. A belt tensioner according to claim 1, wherein said tension adjusting mechanism (1) comprises an adjusting rod (10), an elastic member, a supporting seat (8), a limit stop (12) and an adjusting member, said supporting seat (8) is fixedly disposed, said supporting seat (8) is provided with a through hole for said adjusting rod (10) to pass through, said through hole has a size larger than the cross-sectional size of said adjusting rod (10), one end of said adjusting rod (10) passes through said through hole of said supporting seat (8) and is connected with one end of a fixed shaft (40) of said tension wheel (4), the other end of said adjusting rod (10) is a free end, said adjusting rod (10) can move up and down in said through hole and swing with said swing arm (3) in said through hole, said limit stop (12) is sleeved on the free end of said adjusting rod (10), the adjusting component is connected to the free end of the adjusting rod (10) and is used for adjusting and limiting the position of the limiting baffle (12);

the elastic component is sleeved on the adjusting rod (10) and located between the supporting seat (8) and the limiting baffle (12), when the belt (5) moves on the driving wheel and the tensioning wheel (4), the tensioning wheel (4) is driven by the tensioning force of the belt (5) to drive the adjusting rod (10) to move, so that the elastic component generates elastic deformation and enables the swinging arm (3) to rotate, the adjusting rod (10) and the swinging arm (3) limit the position of the tensioning wheel (4) together, and the tensioning wheel (4) is tightly attached to one side of the loose edge of the belt (5) and tensions the belt (5).

3. A belt tensioner according to claim 2, characterized in that said adjusting rod (10) is vertically arranged, said adjusting rod (10) passes through said supporting seat (8) and its lower end is rotatably connected with one end of the fixed shaft (40) of said tensioner (4); the swing arm supporting seat (2) is fixedly arranged below the adjusting rod (10), and the tensioning wheel (4) is tightly attached to the lower side of the loose edge of the belt (5).

4. A belt tensioner according to claim 2, characterised in that the free end of the adjusting rod (10) is provided with an external thread, the adjusting member is an adjusting nut (11) and is located above the limit stop (12), and the adjusting nut (11) is in threaded connection with the external thread.

5. A belt tensioner according to claim 2, characterized in that said elastic member is a spring (13).

6. A belt tensioner according to any one of claims 1 to 5, further comprising a mounting plate to which said swing arm bearing (2) and said bearing (8) are fixedly attached.

7. A belt tensioner according to claim 6, characterised in that said mounting plate is an engine back plate (6), said engine back plate (6) having an engine mounted thereon; the belt (5) is wound on two driving wheels, the two driving wheels are respectively a driving wheel and a driven wheel, the driving wheel is in transmission connection with an output shaft of the engine, and the driven wheel is arranged in parallel with the driving wheel.

8. A belt tensioner according to any one of claims 1 to 5, characterized in that said oscillating arm (3) is pivotally connected to said oscillating arm support (2) by means of a rotating body (9), said rotating body (9) being fixedly connected to said oscillating arm support (2), said oscillating arm (3) being pivotally connected to said rotating body (9).

9. A belt tensioner according to claim 8, wherein said rotating body (9) comprises a body (90), a bushing (91), a rotating sleeve (92), a retainer ring (93), a sealing ring, a pressing bolt (98) and a lubricating oil nozzle, said body (90) is of a stepped cylindrical structure, one end of said body (90) is fixedly connected with said swing arm supporting seat (2), said bushing (91) is sleeved on said body (90), said rotating sleeve (92) is rotatably sleeved outside said bushing (91), said retainer ring (93) is fixedly connected with the other end of said body (90) through said pressing bolt (98) and limits said rotating sleeve (92) on said body (90), and said swing arm (3) is fixedly connected outside said rotating sleeve (92); the lubricating device is characterized in that two ends of the rotary sleeve (92) extend out of the bushing (91), the inner side walls of two ends of the rotary sleeve (92) are respectively arranged between the sealing rings and the body (90), a lubricating cavity is defined between the sealing rings, the lubricating oil nozzle is arranged on the compression bolt (98), through holes communicated with the lubricating cavity are formed in the compression bolt (98) and the body (90), and the lubricating oil nozzle is communicated with the lubricating cavity through the through holes.

10. A rice transplanter which is characterized by comprising a seedling feeding mechanism, a seedling separating and transplanting mechanism, a frame, a seedling box, a walking device and a bearing floating body, and further comprising a belt tensioning device as claimed in any one of claims 1 to 9.