CN213064514U

CN213064514U - Tensioning device for chain transmission system of seeder

Info

Publication number: CN213064514U
Application number: CN202021295828.1U
Authority: CN
Inventors: 杨东山; 何金伟; 曹现超; 牛吉朋; 蔡登辉; 魏磊; 师宏亮; 张曙彩
Original assignee: Luoyang Tractor Research Institute Co ltd
Current assignee: Luoyang Tractor Research Institute Co ltd
Priority date: 2020-07-06
Filing date: 2020-07-06
Publication date: 2021-04-27
Anticipated expiration: 2030-07-06

Abstract

The utility model relates to a tensioning device for a chain transmission system of a seeder, which comprises a tensioning part and a direction-changing part, wherein the tensioning part comprises a tensioning chain wheel, a bracket welding part and a tensioning spring, the direction-changing part is a direction-changing idler wheel, the tensioning chain wheel and the direction-changing idler wheel are both arranged on the bracket welding part, and the direction-changing idler wheel and the bracket welding part share a mounting bolt, so that the mounting space can be saved, the distance between the tensioning chain wheel and the direction-changing idler wheel is shortened, and the length of a transmission chain is reduced; the direction-changing part directly adopts the direction-changing idle wheel, so that parts such as a bearing, a bearing retainer ring and the like in the chain wheel are saved, the processing difficulty of the direction-changing idle wheel is reduced, the overall dimension of the direction-changing wheel is reduced, the cost of the tensioning device is effectively saved, the transmission fault point and the maintenance workload are reduced, and the use value is good.

Description

Tensioning device for chain transmission system of seeder

Technical Field

The utility model relates to a chain drive technical field, concretely relates to a overspeed device tensioner for seeder chain drive system.

Background

The seeder conventionality adopts the land wheel drive, and the equipment seed metering ware is unset with fertile box of fertile case apart from drive wheel relative distance, and the transmission route is far away, and operational environment is abominable, and the drive ratio needs to be adjusted according to different seeds, consequently, the seeder conventionality adopts chain drive at present. Because the transmission ratio of the seeder needs to be adjusted, the tensioning device needs to have an adjustment stroke with enough distance, in order to control the space occupation, the arrangement of the direction changing device is a better choice, and the structure of the direction changing device directly influences the performance of the chain transmission system of the seeder.

At present, a common chain transmission tensioning mechanism of a seeder is a spring automatic tensioning chain wheel matched with a direction-changing chain wheel to jointly form a seeder chain tensioning mechanism, a tensioning chain wheel component and a direction-changing chain wheel component are separately arranged, and the direction-changing chain wheel component and the tensioning chain wheel component have interchangeability, as shown in fig. 6, the tensioning chain wheel 1 is mounted on the frame through a bracket, and the redirection chain wheel 12 is independently mounted on the frame through bolts and nuts, limited by the size of the chain wheel, and the arrangement mode results in large occupied space of the whole tensioning mechanism, long chain length, and the parts of the direction-changing chain wheel component are more, the number of fault points is more, the maintenance workload is large, the cost is relatively higher, due to the particularity of the seeding agriculture to the time requirement, the seeding machine is required to have the characteristics of few fault points, small maintenance workload or no maintenance, and therefore the prior art needs to be improved to meet the requirement of the seeding machine.

SUMMERY OF THE UTILITY MODEL

To the defect of prior art, the utility model aims to provide a overspeed device tensioner for seeder chain drive system, the device adopt the automatic tensioning of spring, and the part that changes is adopted and is changed to the idler, and tensioning part and change to the part and establish on same support seam spare for the whole spare part of mechanism is few, simple structure, and the transmission fault point is few, and it is little to overhaul work load, can effectively save the overspeed device tensioner cost.

In order to achieve the above purpose, the utility model adopts the technical scheme that: the utility model provides a overspeed device tensioner for seeder chain drive system, overspeed device tensioner includes tensioning member and changes to the part, tensioning member includes tensioning sprocket, support seam piece and tensioning spring, it is the change to the part and is the change to the idler, tensioning sprocket and change to the idler all establish on the support seam piece, the support seam piece includes two parallel arrangement's extension board and is located the connecting plate that is used for two extension boards of fixed connection in the middle of the extension board, the upper portion of support seam piece is equipped with the tensioning sprocket mounting hole, and the bearing is installed and the cover is on being located the sprocket limit sleeve pipe in the middle of two extension boards to tensioning sprocket's hole, and sprocket mounting bolt passes tensioning sprocket mounting hole and sprocket limit sleeve pipe and installs tensioning sprocket on the support seam piece with the nut cooperation, the lower part of support seam piece is equipped with the support mounting hole, and support mounting bolt passes, Support spacing sleeve pipe and support mounting hole and nut cooperation are fixed the support seam piece in the frame, the spacing sleeve pipe of support is two and establish respectively on the support mounting bolt that is located between support seam piece outside and the frame, and two tensioning springs are fixed respectively on the support spacing sleeve pipe of support seam piece both sides, and the both ends support arm of every tensioning spring is fixed respectively on frame and support seam piece, change to the idler and support seam piece sharing support mounting bolt, change to the idler and install on the support mounting bolt in the middle of two extension boards that are located the support seam piece.

Specifically, the inside diameter of the direction-changing idler is larger than the outside diameter of the bracket mounting bolt.

Specifically, chain drive system still includes drive sprocket, driven sprocket and chain, overspeed device tensioner sets up between drive sprocket and driven sprocket, the chain gets back to drive sprocket and forms a closed loop after passing through drive sprocket, driven sprocket, tensioning sprocket respectively from the inside modified idler of bypassing of support seam piece.

Specifically, the middle part of support seam piece is equipped with the fixed orifices that corresponds with the tensioning spring, the one end support arm of tensioning spring passes through the fixed orifices and fixes on the support seam piece.

Advantageous effects

1. The utility model discloses, owing to adopt overspeed device tensioner and change to the fixed bolt of idler sharing, nut, save installation space, shorten the distance of tensioning sprocket and change to the idler, reduced drive chain's length, can save partial cost.

2. The utility model discloses a change to the part and directly adopt and change to the idler, compare prior art, saved spare parts such as the inside bearing of sprocket, retaining ring, reduced the processing degree of difficulty of changing to the idler, reduced the overall dimension of change to wheel, effectively saved and changed to the device cost to transmission fault point and maintenance work volume have been reduced.

Drawings

FIG. 1 is a perspective view of the tensioning device of the present application;

FIG. 2 is a front view of the tensioner of the present application;

FIG. 3 is a side view of the tensioner of the present application;

FIG. 4 is a top view of the tensioner of the present application;

FIG. 5 is a schematic diagram of the operation of the transmission system of the present application;

fig. 6 is a schematic view of a prior art tensioning mechanism.

Reference numerals: 1. tensioning sprocket, 2, redirection idler, 3, support seam piece, 4, tensioning spring, 5, sprocket mounting bolt, 6, support mounting bolt, 7, sprocket limit sleeve, 8, bearing, 9, support limit sleeve, 10, drive sprocket, 11, driven sprocket, 12, redirection sprocket.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-4, a tensioning device for a chain drive system of a seeding machine comprises two parts: the tensioning device comprises a tensioning part and a direction-changing part, wherein the tensioning part comprises a tensioning chain wheel 1, a support welding part 3, a tensioning spring 4, a chain wheel mounting bolt 5, a support mounting bolt 6, a chain wheel limiting sleeve 7, a bearing 8 and a support limiting sleeve 9, and the direction-changing part is a direction-changing idle wheel 2, and the direction-changing idle wheel 2 and the tensioning part share the mounting bolt.

The support welding part 3 specifically comprises two support plates arranged in parallel and a connecting plate positioned between the support plates and used for connecting the two support plates, a tensioning chain wheel mounting hole is formed in the upper portion of the support welding part 3, a support mounting hole is formed in the lower portion of the support welding part 3, a bearing 8 is mounted in an inner hole of the tensioning chain wheel 1 and used for keeping the tensioning chain wheel to normally rotate during working, a maintenance-free bearing is preferably adopted for the bearing 8, and the bearing retainer rings are standard retainer rings for holes and are mounted in the tensioning chain wheel 1 and on the outer side of the bearing 8 and used for fixing the axial position of the bearing 8 in the tensioning chain wheel 1; the tensioning chain wheel 1 is sleeved on a chain wheel limiting sleeve 7 positioned between the two support plates, a chain wheel mounting bolt 5 penetrates through a chain wheel mounting hole in the support welding piece 3 and the chain wheel limiting sleeve 7 and is matched with a nut to mount the tensioning chain wheel 1 on the support welding piece 3, and the chain wheel limiting sleeve 7 has the main function of limiting the axial movement of the tensioning chain wheel 1 and keeping the stable work of the chain wheel and the chain; the bracket welding piece 3 is installed on a rack through a bracket mounting bolt 6, specifically, the bracket mounting bolt 6 penetrates through the rack, bracket limiting sleeves 9 and bracket mounting holes to be matched with nuts to fix the bracket welding piece 3 on the rack (the rack is not shown in fig. 1-4, but the vacant positions at two ends of the bracket mounting bolt 6 in the figures are the positions of the rack), the two bracket limiting sleeves 9 are respectively arranged on the bracket mounting bolt 6 between the outer side of the bracket welding piece 3 and the rack, the two tensioning springs 4 are respectively fixed on the bracket limiting sleeves 9 at two sides of the bracket welding piece 3, the bracket limiting sleeves 9 are used for limiting the axial movement of the bracket welding piece 3 on one hand, and providing internal support for the tensioning springs 4 during working on the other hand; the both ends support arm of every tensioning spring 4 is fixed respectively on frame and support seam piece 3, specifically, the middle part of support seam piece 3 is equipped with the fixed orifices that corresponds with tensioning spring 4, the one end support arm of tensioning spring 4 passes through the fixed orifices to be fixed on support seam piece 3, change to idler 2 and support seam piece 3 sharing support construction bolt 6, change to idler 2 and install on being located support construction bolt 6 in the middle of two spinal branch boards of support seam piece 3, change to the internal diameter of idler 2 and be greater than the external diameter of support construction bolt 6.

As shown in fig. 5, the seeder chain drive system of the present application includes a driving sprocket 10, a driven sprocket 11, a chain and a tensioning device, the tensioning device is disposed between the driving sprocket 10 and the driven sprocket 11, the chain respectively passes through the driving sprocket 10, the driven sprocket 11, the tensioning sprocket 1, and then returns to the driving sprocket 10 after bypassing the modified idler 2 from the inside of the bracket seam piece 3 to form a closed loop, the bracket seam piece 3 is used for supporting the tensioning sprocket 1 to operate normally, and simultaneously maintaining the reasonable distance between the tensioning sprocket 1 and the direction-changing idler 2, and maintaining the working tension of the tensioning spring 4, the direction-changing idler 2 and the bracket seam piece 3 share a mounting bolt, the bracket mounting bolt 6 supports the bracket seam piece 3 and the direction-changing idler 2 in the whole tensioning device, and also supports the tensioning spring 4 to maintain automatic tensioning, after the tensioning spring 4 adjusts the pre-tightening force once, the chain tension vibrates along with the chain, and the tension floats in the range of the pre-tightening force; the main function of the tension chain wheel 1 is to keep the chain running stably under tension; the bend idler wheel 2 is used for changing the motion track of the chain, reasonably arranging a transmission line, reducing the arrangement space of the tensioning mechanism and reducing the motion resistance of the chain; during operation, the tensioning device rotates clockwise around the support mounting bolt 6 under the effect of tensioning spring 4, and tensioning device tensioning the chain in the clockwise rotation process, and redirection idler 2 changes the transmission path of chain, realizes the rational arrangement of chain, realizes the tensioning function under the tensioning device rotating state to redirection idler 2 of this application rotates along with the chain, changes sliding friction into rolling friction, reduces the wearing and tearing of chain and redirection idler.

The utility model discloses a overspeed device tensioner and the integrated technical scheme design together of driven pulley have reduced overspeed device tensioner's spare part quantity, have shortened chain length, have effectively solved current seeder chain drive system overspeed device tensioner's shortcoming, the device simple structure, easily make the installation, the fault point is little with the maintenance work load, can effectively reduce overspeed device tensioner's cost through practice proof, has fine use value.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description in any form, and although the present invention has been disclosed with reference to the preferred embodiment, it is not limited to the present invention, and any skilled person in the art can make modifications or changes equivalent to the equivalent embodiment of the above embodiments without departing from the scope of the present invention.

Claims

1. The utility model provides a overspeed device tensioner for seeder chain drive system, overspeed device tensioner includes tensioning member and changes to the part, tensioning member includes tensioning sprocket (1), support seam (3) and tensioning spring (4), its characterized in that, it is change to direction part for changing to idler (2), tensioning sprocket (1) and change to idler (2) all establish on support seam (3), support seam (3) include two parallel arrangement's extension board and be located the connecting plate that is used for two extension boards of fixed connection in the middle of the extension board, the upper portion of support seam (3) is equipped with the tensioning sprocket mounting hole, and bearing (8) and cover are installed on being located the middle sprocket position limiting sleeve (7) of two extension boards to the hole of tensioning sprocket (1), and sprocket construction bolt (5) pass tensioning sprocket mounting hole and sprocket position limiting sleeve (7) and install tensioning sprocket (1) on support seam (3) with the nut cooperation, the lower part of support seam spare (3) is equipped with the support mounting hole, and support seam spare (3) are fixed in the frame with the nut cooperation in support mounting bolt (6) pass frame, support spacing sleeve pipe (9) and support mounting hole, support spacing sleeve pipe (9) are two and establish respectively on being located support seam spare outside and support mounting bolt (6) between the frame, and two tensioning springs (4) are fixed respectively on support spacing sleeve pipe (9) of support seam spare (3) both sides, and the both ends support arm of every tensioning spring (4) is fixed respectively on frame and support seam spare (3), change to idler (2) and support seam spare (3) sharing support mounting bolt (6), change to idler (2) and install on support mounting bolt (6) in the middle of two spinal branch boards that are located support seam spare (3).

2. A tensioning device for a seeder chain drive as claimed in claim 1, characterized in that the inside diameter of the redirecting idler (2) is greater than the outside diameter of the bracket-mounting bolt (6).

3. The tensioning device for the chain transmission system of the seeding machine according to claim 1, characterized in that the chain transmission system further comprises a driving sprocket (10), a driven sprocket (11) and a chain, the tensioning device is arranged between the driving sprocket (10) and the driven sprocket (11), and the chain passes through the driving sprocket (10), the driven sprocket (11) and the tensioning sprocket (1) respectively, bypasses the redirection idler (2) from the inside of the bracket seam part (3) and returns to the driving sprocket (10) to form a closed loop.

4. The tensioning device for the chain transmission system of a seeding machine according to claim 1, characterized in that the bracket seam (3) is provided at its middle with a fixing hole corresponding to the tensioning spring (4), and the one end arm of the tensioning spring (4) is fixed to the bracket seam through the fixing hole.