JPH0730013U - Transmission shaft cover - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a transmission shaft cover that can be easily attached and detached. [Structure] On a peripheral wall of a cylindrical cover 75 having elasticity,
A notch a along the axial direction is inserted to form a C-shaped cross section, and a detent portion c that engages with an engagement portion b on the bearing side in a disengageable manner is formed at an end portion of the peripheral wall.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a transmission shaft cover used for work vehicles and other devices.

[0002]

[Prior art]

 Conventionally, for example, when a tubular transmission shaft cover is provided on a PTO shaft that extracts power from a traveling machine of a tractor to a work machine for dustproofing, waterproofing, and safety, the cylindrical cover is assembled before coupling is assembled. It was mounted on the shaft by mounting it on the bearing side, or by tying a cover divided into cylindrical pieces to the shaft and mounting it on the shaft.

[0003]

[Problems to be solved by the device]

 However, if a single pipe-shaped cover is to be installed, it is not possible after connecting the shafts and assembling.Therefore, it is necessary to mount the pipes before assembling to assemble the shafts such as coupling couplings. The connection work of the shaft after the exterior is complicated and inefficient. Further, the split type cover requires fixing tools such as a band, a clip, and a tightening bolt for fixing the cover in a tying state, and in addition, it requires a lot of time for the fixing work, which results in a high cost. there were.

[0004]

[Means for Solving the Problems]

 In the cover of the present invention for solving the above-mentioned problems, a transmission shaft 61 whose both ends are rotatably supported by an input side bearing and an output side bearing is provided with a rotation stop c on at least one bearing side of both ends. In the tubular cover 75 to be externally covered, the cover 75 is made of a synthetic resin material having a certain rigidity and elasticity, and a peripheral wall is formed with a cut a that can be opened and closed in the outer peripheral direction to have a diameter larger than the shaft diameter, and at least at one end. It is characterized in that a detent portion c is provided which engages with the locking portion b on the bearing side in a disengageable manner.

[0005]

[Action]

 The cover 75 is elastically pushed leftward and rightward from the notch a in a state of being fitted to the transmission shaft 61 after being assembled and coupled, and is exteriorized along the shaft 61 and is restored to a tubular shape. The cover 75 is fixed to the bearing side so as not to be continuous with the transmission shaft 61 by being engaged with a rib or other locking portion b on the bearing side.

[0006]

【Example】

 The drawings show an embodiment in which the transmission shaft cover of the present invention is applied to a surface sand sampling device of a water purification filter, and the sampling device in FIGS. 1 and 2 is a traveling machine body 2 configured on a machine body frame 1. The crawler traveling part 6 driven by the drive wheels 4 pivotally supported by the transmission 3 is attached to the front of the machine body 2, and the filter tank dirt attached through the lifting link 8 composed of four parallel links. It is sent from the sand scraping device 9 and the transfer device 10 and the transfer device 10 which are screw conveyors for horizontally transferring the sand scraped up from the scraping device 9 to the sand lifting device 11 side described next. The working unit 7 is configured by the sand lifting device 11 that lifts the dirty sand upward, and is provided with the ground leveling device 12 that is attached to the rear of the machine body 2 so as to be vertically swingable. Reference numeral 30 is a helix that constitutes a conveyor.

A driver's seat 13 is fixedly mounted on the right front end of the machine body frame 1, and a driver's seat frame 14 whose upper surface constitutes a step is projectingly provided at the front end of the driver's seat 13. On the front end of the seat frame 14, an operation panel 16 for performing traveling operation and the like is provided, and on the left side, an operation lever guide cover 20 is similarly provided. An engine 18 is mounted on the left side of the rear end of the machine frame 1 behind the driver's seat 13, and a water resistant water collecting scrape sand is placed at or near the center of gravity of the machine on the floor approximately in the center of the machine. A bag-shaped sand pack (container) 19 made of cloth or mesh material is placed, and poles 21 and 22 for supporting the sand pack 19 in an open state are erected at front, rear, left and right positions of the sand pack 19. Has been done. As shown in FIG. 2, the sand pack 19 has a circular shape or a substantially square shape in plan view.

As shown in FIGS. 1 and 2, the working unit 7 includes a left and right side plates 23 attached to the working frame 15, and a scraping bottom plate 26 that rises and slopes in an arc shape from the front to the rear between the left and right side plates 23 and 23. The bucket 28 has a transverse feed casing 27, the lower end of which is curved in an arc shape, and the bucket 28 is formed in a continuous manner. The bucket 28 is integrally fixed with lateral beams 31 as required. . An opening / closing cover 25 is attached to the upper part of the bucket 28 via a hinge 24. A knife-shaped plate 32 for sand scraping is fixed to the bottom surface of the scraping bottom plate 26 of the bucket 28 and the bottom surfaces of the side plates 23, 23. The tip of the plate 32 forms a sharp cutting edge. As the machine body 2 advances, the surface of the filtered sand is scraped off to a thickness of, for example, about 10 to 20 mm (desirably 15 mm + · −5 mm) and scraped off to be received on the bottom plate 26.

The base ends of the links 8 are respectively connected to the tip of the body frame 1, and the elevating frame 15 is connected to the tip of the elevating frame 15 so as to be movable up and down. The frame 17 is mounted so that it can be rolled. Then, between the two links 8 connected to the left and right ends of the lifting frame 15 and the machine body frame 1, as shown in FIGS. 2 and 3, a cylinder 33 for lifting the lifting link 8 and the scraping device 9 up and down. Is stretched. The elevating link 8 comprises an upper link and a lower link to form two upper and lower parallel links.

A rotor 34 is rotatably supported between the side plates 23, 23 by a rotor shaft 36 in the front of the bucket 28. The tip of the rotor 34 is staggered by a predetermined angle around the rotor shaft 36. A large number of scraping claws (not shown) that are twisted and curved to the left or right are attached by bolting.

The scraping claws are arranged such that the curved ends adjacent to each other around the axis overlap with each other, and the surface layer of the sand ground is scraped off so that there is no uniform scraping around the entire circumference when the rotor rotates. Has become. Then, the surface sand is scraped by the rotation of the rotor 34 (clockwise rotation in FIG. 1), and is scraped backward along the bottom plate 26 and thrown into the transfer device 10.

The transfer device 10 is configured to house the spiral 30 in the casing 27 and pivotally support the spiral shaft 43 between the side plates 23, 23. The sand scraped by the scraping device 9 is laterally moved to the left end. It is something to send.

Further, a joint case 44 of the sand lifting device 11 whose right end surface is connected to the casing 27 is fixed to the left end of the bucket 28, and the left end of the spiral shaft 43 is inserted and supported by the shaft. A lower end of a sand lifting cylinder 47 which accommodates the lifting sand spiral 46 is connected above the joint case 44, and a lower end of a shaft 48 of the lifting sand spiral 46 is rotatably supported by the joint case 44. At the upper end of the sand lifting cylinder 47, a discharge cylinder 49 for shooting the lifted sand into the sand pack 19 is pivotally joined.

A transmission mechanism (not shown) for transmitting the rotation of the spiral shaft 43 to the lift sand spiral 46 is attached to the joint case 44. As a result, the sand introduced into the casing 27 is sent to the left end by the helix 30, and is lifted and conveyed to the upper part of the sand lifting cylinder 47 by the lifted sand helix 46, and is thrown into the sand pack 19.

The pole 21 at the outer peripheral position of the sand pack 19 is bent in a V shape so that the tip thereof spreads outward, and smoothly guides the loading and unloading corresponding to the large and small sand packs 19. be able to.

As shown in FIGS. 1 and 2, the upper end of the coil 21 is engaged with the upper end of the coil spring 79 through the protrusion 78, and the lower end of the coil spring 79 is engaged with the upper edge of the sand pack 19. The sand pack 19 is releasably engaged with the stopper, and is placed on the body floor with the upper opening elastically opened, and is held so that the sand from the discharge tube 49 can be easily received. . The pole 22 also serves as a pillar for lifting the body.

When a predetermined amount of sand is stored in the sand pack 19, the lower end of the rope 81 is locked to the locking portion of the sand pack 19 and the rope 81 is lifted by the crane hook 82. , Remove the sand pack 19 from the machine and set a new empty sand pack. Therefore, the sand pack 19 can be loaded and unloaded by a crane truck or the like.

A pair of tank bases 87 on which the fuel tanks 86 are mounted are erected upright in front of the space formed in the right rear end corner of the machine body frame 1, and below the tank bases 87. A U-shaped lift frame 88 is rotatably supported with its front end being an open end, and the ground leveling device 12 is connected to the rear end of the lift frame 88 via a connecting frame 89. At the rear end of the lift frame 88, a lift cylinder 92 is stretched between the lift frame 88 and a column 91 that stands upright on the machine frame 1 side, and the lift frame 88 is moved up and down to move the ground leveling device 12 up and down. It is a mechanism.

Next, the transmission system for driving the machine body traveling and working unit 7 will be described. The rotation of the two output pulleys 51, 52 of the engine 18 is performed by two relay pulleys pivotally supported in front of the machine body 2. The belt is transmitted to 53 and 54. The rotation of the pulley 54 is input to the transmission 3 via the transmission input shaft 50 to perform traveling transmission, and the rotation of the pulley 53 is transmitted to the shaft 56, the relay gear box 57, the variable transmission shaft 58, the relay gear box 59, and the work unit transmission. It is transmitted to the working unit 7 via the shaft 61.

The rotation of the pulley 62 fitted to the tip of the working part transmission shaft 61 is rotated by the spiral shaft 43 and the rotor shaft 36 via the respective input pulleys 63 and 64 and the relay pulley 66. The belt is transmitted as the rotational force of. The transmission in the working unit 7 may be a chain transmission using a sprocket.

The variable transmission shaft 58 and the work portion transmission shaft 61 are provided with a transmission shaft cover as shown in FIG. 4, and these transmission shafts and covers will be described in detail below. The variable transmission shaft 58 is connected between the output shaft 67 and the input shaft 68 of the relay gearboxes 57 and 59 through couplings (universal joints) 69 and 69, and the spline shaft at the proximal end portion is different from the sleeve 58a at the distal end portion. 58b is movably fitted and connected so that it can be expanded and contracted and flexibly deformed as the working unit 7 moves up and down.

Reference numeral 71 is a cylindrical cover made of a synthetic resin pipe such as thin vinyl chloride having a high elasticity, and end covers 72 and 73 for covering the coupling 69 at the base end and the end. Is connected so that it can be bent, and on the base end side, the joint parts 71a, 72b at the two locations where a part of the abutted peripheral wall ends project can be pivotally bent and extended by a connecting tool 74 such as a rivet. Are linked to. On the tip end side, the joint end of the cover 71 and the end cover 73 is fitted so as to be slidable in the axial direction in a bent state, so that expansion and contraction and bending are possible.

The lower peripheral wall of each of the covers 71, 72, 73 is formed with a notch a in the axial direction over the entire length, and each cover has a C-shaped cross section that can be opened and closed in the circumferential direction at the notch a. . With the above structure, the covers 71 to 73 are opened from the notch a to the left and right with the variable transmission shaft 58 connected and set, and the transmission shaft 58 is covered from above, and after that, the elastic restoring force of each cover itself. Then, the end covers 72 and 73 are fitted to the outer circumferences of the bearings (bosses) of the input / output shafts 67 and 68 of the gear boxes 57 and 59.

In addition, at the upper peripheral wall ends of the outer ends of the end covers 72 and 73, slit-shaped parts that engage with the engaging parts b and b that also project as ribs on the outer circumference of the boss on the gear box 57 and 59 side. A detent portion c, which is a notch, is formed on the opposite side to the cut a, and the cover set is completed by engaging the detent portion c with each engaging portion after the exterior covering, thereby completing the transmission shaft. Even if 58 rotates, the covers 71 to 73 do not rotate, and when the shaft expands or contracts, the joint between the end cover 73 and the cover 71 expands and contracts.

Furthermore, a cover 75 made of a thin-walled pipe made of a synthetic resin material, such as a cylindrical vinyl chloride, which is straight to the work part transmission shaft 61 is also installed, and the cover 75 is the same as before and after. A cut a over the entire length and a rotation stop c on the base end side are formed. The cut a is opened to cover the transmission shaft 61, and the front and rear ends are the gear box 59 and the bearing portion (boss portion) of the front end flange 76. ), And the locking portion c at the base end is engaged with the rib (engaging portion) b on the gear box 59 side to be set. As a result, the cover 75 can be held in a fixed state even if the shaft 61 rotates. A coupling 70 connects the shafts 61 and 77.

Below the oil tank 86, the engine 18, the transmission 3 and the like where oil is used on the vehicle body frame 1, square plate-shaped oil pans 80 are attached in a substantially horizontal plane. Is equipped with a drain 85 with a cock 84 for taking out the oil dropped inside. Each of the oil receiving trays 80 is located away from the crawler traveling section 6 and has a structure that prevents oil from falling onto the sand and facilitates oil discharge.

In the present embodiment, the application to a sand collecting device that is particularly required to prevent the adhesion of sand or the like to the transmission shaft is shown, but it is necessary to cover the shaft of other agricultural work machines, civil engineering work machines, and the like. It can be used for the transmission shaft cover of all required machines.

[0028]

[Effect of device]

 According to the transmission shaft cover of the present invention configured as described above, the elasticity of the tubular cover is used to push the notch wider than the shaft diameter against the transmission shaft incorporated between the bearings to expand the cut around the shaft. The shaft can be mounted so as to completely cover the shaft between the bearings by the elastic restoring force, and there is no problem such as water being accumulated at the bottom or lower end of the cross section due to the cut. It is also possible to prevent internal grease and the like from falling to the ground. Also, by engaging the anti-rotation part using the reinforcing ribs and other irregularities on the bearing side, there is an advantage that it can be easily attached and detached without using special attachments or fasteners in both the axial and rotational directions. .

[Brief description of drawings]

FIG. 1 is an overall side view of a sand collecting device.

FIG. 2 is an overall plan view of the sand collecting device.

FIG. 3 is a front view of a main part of the sand scraping device.

FIG. 4 is an enlarged perspective view of a main part showing a configuration of a transmission shaft cover and a transmission shaft of the present invention.

[Explanation of symbols]

 61 transmission shaft 75 cover a notch b locking part c anti-rotation part

Claims (1)

[Scope of utility model registration request] 1. A tubular body having a transmission shaft (61) having both ends rotatably supported by input-side and output-side bearings and provided with detents (c) on at least one of the bearings at both ends for exterior mounting. In the cover (75), the cover (75) is made of a synthetic resin material having a certain rigidity and elasticity, and a peripheral wall is formed with a notch (a) that can be opened and closed in the outer peripheral direction to have a diameter larger than the shaft diameter, and at least at one end. A transmission shaft cover provided with a rotation stopping portion (c) which is engaged with and disengageably engages with a locking portion (b) on the bearing side.