Tensioning mechanism of floating roller transmission chain

Abstract

The utility model relates to a tensioning mechanism of a floating roller transmission chain, two floating rollers are arranged at two ends of a floating front arm, the end parts of the two floating rollers are coaxially and fixedly provided with a chain wheel respectively, a transmission chain is connected between the two chain wheels, and the transmission chain is compressed through the tensioning mechanism; the tensioning mechanism comprises a tensioning wheel support and a tensioning wheel, an arc-shaped long hole and a round hole are formed in the left side and the right side of the upper portion of the tensioning wheel support, and the arc-shaped long hole takes the center of the round hole as a circle. A tensioning wheel mounting hole is formed in the lower part of the tensioning wheel support; the tensioning wheel support is rotationally connected with a supporting shaft which is vertically fixed on the floating front arm through a round hole in the upper part to form a rotation adjusting center of the tensioning wheel support; the tensioning wheel support is fixed to the floating front arm through a connecting piece penetrating through the arc-shaped long hole. And the tensioning wheel is connected with a tensioning wheel mounting hole in the lower part of the tensioning wheel support through a wheel shaft and is pressed below the lower stroke section of the transmission chain. According to the mechanism, the tensioning force can be adjusted, and the relative position of the transmission chain is kept unchanged in the floating process.

Description

Technical Field

[0001] The utility model belongs to the field of self-propelled forage harvesters, relates to a conveying device in the harvester, and specifically relates to a tensioning mechanism of a floating roller transmission chain. Background Art

[0002] When the current self-propelled forage harvester is in operation, the conveying device is basically a four-roller conveyor. Figure 1 , including two upper rollers and two lower rollers, the two lower rollers are fixed rollers, and the two upper rollers are floating rollers. The two upper rollers are marked with numbers 1 and 5 in the attached drawings. The two upper rollers are installed in the following manner: the two upper rollers are installed at both ends of the floating front arm through a rotating shaft, the rear end of the floating front arm 3 is rotatably connected to the front end of the floating rear arm with the rear end rotating shaft as the center, and the connection constitutes the rotation center of the floating front arm, the rear end of the floating rear arm 6 is rotatably connected to the support shaft 7 fixed on the frame, and constitutes the rotation center of the floating rear arm, and a tension spring is connected downwardly at the front end and the middle part of the floating front arm to achieve the two floating rollers approaching the two fixed rollers. A sprocket is installed at each end of the two floating rollers, and a transmission chain 2 is connected between the two sprockets.

[0003] During transportation, the two upper rollers are always in the process of floating up and down. Due to the specificity of the center distance between the two upper rollers, the sprocket transmission speed ratio and the chain length (rounding the number of chain sections), the transmission chain length of the floating roller is longer than the minimum contour length of the two sprocket section circles. The chain is always in a sagging state, which is very likely to cause the risk of the chain scraping or rubbing other components. In addition, the transmission chain is always in the process of floating up and down, and it is inconvenient to tighten the chain. Utility Model Content

[0004] The utility model aims at the deficiencies of the prior art and proposes a tensioning mechanism for a floating roller transmission chain which can adjust the tensioning force and keep the relative position of the transmission chain unchanged during the floating process, thereby reducing excessive wear and chain failure caused by chain jumping.

[0005] The above-mentioned purpose of the utility model is achieved through the following technical solutions:

[0006] The camshaft of the two wheels is connected with the gear train of the two wheels through the interlocking structure and the interlocking structure of the two wheels, and the camshaft is connected with the gear train of the two wheels through the interlocking structure to form a gear train.

[0007] The tension wheel is connected to the tension wheel mounting hole at the bottom of the tension wheel support through a wheel shaft. The tension wheel is arranged below the lower travel section of the transmission chain and forms a tensioning contact with the transmission chain.

[0008] Moreover, the connecting member is a screw rod, which is vertically welded and fixed on the floating forearm. The screw rod passes through the arc-shaped long hole on the upper part of the tensioner support. By locking a nut at the outer end of the screw rod, the tensioner support and the floating forearm can be fixedly connected.

[0009] Moreover, a threaded hole is arranged on the floating forearm at a position corresponding to the arc-shaped long hole on the tensioner support, and a locking screw passes through the arc-shaped long hole on the tensioner support and is screwed and connected with the threaded hole on the floating forearm, so that the tensioner support is fixed on the floating forearm.

[0010] Moreover, an adjusting handle is vertically fixed on the tensioning wheel support at a position close to the upper part and away from the supporting shaft.

[0011] The advantages and positive effects of the utility model are:

[0012] 1. The utility model directly installs the tensioner wheel support for installing the chain tensioner wheel on the floating forearm, and the tensioner wheel is installed at the lower part of the tensioner wheel support and cooperates with the lower travel section of the transmission chain to achieve the upward and downward movement of the tensioner wheel synchronously with the upward and downward movement of the transmission chain, thereby achieving that during the floating process, the relative position of the transmission chain and the tensioner wheel remains unchanged, thereby ensuring the stable tensioning of the transmission chain and avoiding the transmission chain from being in a sagging state, thereby avoiding the risk of the chain scraping or rubbing other components, thereby reducing excessive wear and chain failure caused by chain jumping.

[0013] 2. The tensioning wheel support in the tensioning mechanism of the utility model is relatively rotatably connected to the floating forearm through the support shaft, so that the position of the tensioning wheel support can be adjusted around the support shaft, and the tensioning wheel support and the floating forearm are fixedly connected through a connecting piece installed in the arc-shaped long hole, so that the upper and lower positions of the tensioning wheel can be adjusted, and then the tensioning force of the transmission chain can be adjusted, so as to achieve a better tensioning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0015] The structure of the utility model is further described below with reference to the accompanying drawings and through embodiments. It should be noted that the embodiments are descriptive rather than restrictive.

[0016] A tensioning mechanism for a floating roller transmission chain, see Figure 1 , two floating rollers are installed at the two ends of the floating forearm through a rotating shaft, and a sprocket is coaxially fixedly installed at the ends of the two floating rollers, and a transmission chain is connected between the two sprockets. The transmission chain is compressed by a tensioning mechanism. The tensioning mechanism adopts a roller-floating tensioning mechanism, and the roller-floating tensioning mechanism includes a tensioning wheel support 4 and a tensioning wheel 10. The upper left and right parts of the tensioning wheel support are provided with arc-shaped long holes 4.1 and round holes, and the arc-shaped long holes are circular with the center of the round holes. A tensioning wheel mounting hole is provided at the lower part of the tensioning wheel support. The tensioning wheel support is rotatably connected to the support shaft 8 vertically fixed on the floating forearm through the round hole at the upper part, forming the rotation adjustment center of the tensioning wheel support. The tensioning wheel support is fixedly connected to the floating forearm through a connecting piece 9 passing through the arc-shaped long hole, so as to realize the locking and fixing of the tensioning wheel support after it is adjusted into place.

[0017] The tension wheel is connected to the tension wheel mounting hole at the bottom of the tension wheel support through a wheel shaft. The tension wheel is arranged below the lower travel section of the transmission chain and forms a tensioning contact with the transmission chain.

[0018] The connecting piece between the fixed tension wheel support and the floating forearm can be a screw rod, which is vertically welded and fixed to the floating forearm. The screw rod passes through the upper arc-shaped long hole of the tension wheel support. By locking the nut at the outer end of the screw rod, the tension wheel support and the floating forearm can be fixedly connected. A threaded hole can also be set on the floating forearm at a position corresponding to the arc-shaped long hole of the tension wheel support. The locking screw passes through the arc-shaped long hole on the tension wheel support and is screwed and connected with the threaded hole on the floating forearm, which can also fix the tension wheel support on the floating forearm. When the locking nut or the locking screw is loosened, the tension wheel support can be rotated around the support shaft to realize the lifting or lowering of the tension wheel, and the transmission chain is applied with a suitable tensioning force through the tension wheel.

[0019] In the present invention, in order to facilitate the rotation adjustment of the tensioner support around the support shaft, an adjustment handle 11 can be vertically fixed on the tensioner support near the upper part and away from the support shaft, and the position of the tensioner support can be adjusted by holding the handle.

[0020] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, changes and modifications are possible without departing from the spirit of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A tensioning mechanism for a floating roller transmission chain, characterized in that: Two floating rollers are installed at the two ends of the floating forearm through a rotating shaft, and a sprocket is coaxially fixedly installed at the ends of the two floating rollers. A transmission chain is connected between the two sprockets, and the transmission chain is compressed by a tensioning mechanism; the tensioning mechanism adopts a roller-floating tensioning mechanism, and the roller-floating tensioning mechanism includes a tensioning wheel support and a tensioning wheel, and the upper left and right parts of the tensioning wheel support are provided with arc-shaped long holes and round holes, and the arc-shaped long holes are circular with the center of the round holes; the lower part of the tensioning wheel support is provided with a tensioning wheel mounting hole; the tensioning wheel support is rotatably connected to the support shaft vertically fixed on the floating forearm through the round hole on the upper part, forming a rotation adjustment center of the tensioning wheel support; the tensioning wheel support is fixedly connected to the floating forearm through a connecting piece passing through the arc-shaped long hole; The tension wheel is connected to the tension wheel mounting hole at the bottom of the tension wheel support through a wheel shaft. The tension wheel is arranged below the lower travel section of the transmission chain and forms a tensioning contact with the transmission chain.

2. The tensioning mechanism of the floating roller transmission chain according to claim 1, characterized in that: The connecting piece is a screw rod, which is vertically welded and fixed on the floating forearm. The screw rod passes through the arc-shaped long hole on the upper part of the tensioner support. The tensioner support and the floating forearm can be fixedly connected by locking a nut at the outer end of the screw rod.

3. The tensioning mechanism of the floating roller transmission chain according to claim 1, characterized in that: A threaded hole is arranged on the floating forearm at a position corresponding to the arc-shaped long hole on the tension wheel support. The locking screw passes through the arc-shaped long hole on the tension wheel support and is screwed and connected with the threaded hole on the floating forearm to fix the tension wheel support on the floating forearm.

4. The tensioning mechanism of the floating roller transmission chain according to claim 1, characterized in that: An adjusting handle is vertically fixed on the tensioner support at a position close to the upper part and away from the supporting shaft.

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