Direction rotating mechanism

Abstract

The invention belongs to the technical field of steering mechanical parts, and discloses a directional rotating mechanism which comprises a driving arm, a driven arm, a transmission mechanism, a first shaft body and a second shaft body, one end of the driving arm is rotationally connected to the first shaft body, and the other end is movably connected with the upper end of the transmission mechanism; the lower end of the transmission mechanism is fixedly connected to the second shaft body, and one end of the driven arm is also fixedly connected to the second shaft body; the driving arm rotates on the horizontal plane to drive the transmission mechanism and the driven arm to rotate on the vertical plane. The transmission device is simple in structure, small in transmission gap, stable in transmission and high in flexibility and practicability.

Description

Technical Field

[0001] The invention relates to the technical field of steering mechanical parts, in particular to a direction rotating mechanism. Background Art

[0002] At present, in order to solve the problem of spatial motion conversion and transmission of mechanical devices, many mechanical devices need to be equipped with a direction conversion mechanism to achieve the change of the motion direction of the upper moving part. Common direction conversion mechanisms mainly include gear transmission mechanisms, cam mechanisms, worm gear transmission mechanisms, ball head transmission mechanisms and rotating arm transmission mechanisms.

[0003] Among common direction conversion mechanisms, the ball head transmission mechanism is usually more complex and has a large structural space size, which will increase the space of the device; other mechanical transmission mechanisms mainly use a large gap method to compensate for the motion interference in the transmission process, but the large gap method will cause the transmission mechanism to have large clearance swing during operation, unstable transmission, and easy damage. Summary of the invention

[0004] The object of the present invention is to provide a directional rotation mechanism with simple structure, small transmission gap, stable transmission, strong flexibility and practicality.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A directional rotation mechanism comprises an active arm, a driven arm, a transmission mechanism, a first shaft and a second shaft; one end of the active arm is rotatably connected to the first shaft, and the other end is movably connected to the upper end of the transmission mechanism; the lower end of the transmission mechanism is fixedly connected to the second shaft, and one end of the driven arm is also fixedly connected to the second shaft; the active arm rotates on a horizontal plane, driving the transmission mechanism and the driven arm to rotate on a vertical plane.

[0007] Furthermore, the transmission mechanism includes a fixed part and a movable part, the fixed part is fixed on the second shaft body; the upper end of the movable part is slidably connected to the active arm, and the lower end is movably connected to the fixed part.

[0008] Furthermore, the lower end of the movable part is rotatably arranged on the fixed part; a first sliding mechanism is arranged on the top of the movable part, a second sliding mechanism is arranged on the active arm, and the first sliding mechanism and the second sliding mechanism are slidably connected.

[0009] Furthermore, the top of the movable part is triangular in shape as a whole, and the edges are rounded.

[0010] Furthermore, the first shaft body and the second shaft body are arranged perpendicular to each other.

[0011] Furthermore, the second shaft body is a hollow structure, a fixed shaft is provided inside, and the fixed shaft and the second shaft body are clearance-matched.

[0012] Furthermore, a connecting through hole for cooperating with an external pull wire is provided on the other end of the driven arm.

[0013] The beneficial effects of the present invention are:

[0014] 1. The present invention has a simple structure and is easy to install and disassemble. The active arm, the transmission mechanism and the driven arm cooperate to realize flexible control of the steering. The transmission is stable and not easy to be damaged. The flexibility and practicality are strong.

[0015] 2. The top of the movable part in the transmission mechanism of the present invention is triangular as a whole, and the edges are rounded, which can reduce the weight of the movable part and ensure that the active arm can flexibly drive the transmission mechanism to rotate; at the same time, the strip hole opened on the movable block in the movable part can not only be used as a slideway, but also as a weight-reducing hole to further play a role in weight reduction.

[0016] 3. The movable shaft of the present invention is arranged in the movable sleeve in a telescopic rotation manner, which can improve the fit between the transmission mechanism and the active arm, so that the active arm can flexibly drive the transmission mechanism to rotate when rotating, with high flexibility and good adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work:

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the positional relationship between the active arm, the driven arm and the transmission mechanism of the present invention.

[0020] Figure 3 It is a schematic diagram of the positional relationship of some components of the present invention after being decomposed.

[0021] Figure 4 It is a schematic diagram of a top view structure of the present invention.

[0022] Figure 5 It is a side view structural schematic diagram of the present invention.

[0023] Figure 6 It is a schematic diagram of a result of the cooperation between the fixed sleeve and the movable shaft in Example 1.

[0024] Figure 7 It is a schematic diagram of the result of the cooperation between the fixed sleeve and the movable shaft in Example 2.

[0025] In the figure: 1. Active arm; 2. Driven arm; 3. Transmission mechanism; 4. First shaft; 5. Second shaft; 6. Fixed shaft; 7. Connecting through hole; 8. First sliding mechanism; 9. Second sliding mechanism; 10. Protrusion; 11. Groove;

[0026] 301. Fixed parts; 302. Movable parts;

[0027] 311. Fixed plate; 312. Fixed sleeve;

[0028] 321. Movable block; 322. Movable axis. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be described clearly and completely in combination with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are partial embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0030] Example 1

[0031] like Figures 1 to 6 As shown, a directional rotation mechanism includes an active arm 1, a driven arm 2, a transmission mechanism 3, a first shaft 4 and a second shaft 5; one end of the active arm 1 is rotatably connected to the first shaft 4, and the other end is movably connected to the upper end of the transmission mechanism 3; the lower end of the transmission mechanism 3 is fixedly connected to the second shaft 5, and one end of the driven arm 2 is also fixedly connected to the second shaft 5; the active arm 1 rotates on the horizontal plane, driving the transmission mechanism 3 and the driven arm 2 to rotate on the vertical plane. In the invention, the second shaft 5 is a hollow structure, with a fixed shaft 6 inside, and the fixed shaft 6 and the second shaft 5 are in clearance fit.

[0032] The direction rotation mechanism of the present invention is mainly suitable for machines with steering functions, especially for agricultural machinery, such as rotary tillers and hilling machines. The present invention takes a rotary tiller as an example to briefly explain the assembly method. During assembly, the active arm 1 of the present invention is connected to the steering wheel, and the active arm 1 is controlled to rotate around the first shaft 4 by turning the steering wheel. Driven by the active arm 1, the top of the transmission mechanism 3 swings synchronously with the active arm 1. Since the second shaft 5 is fixed to the rotary tiller by the fixed shaft 6, the transmission mechanism 3 drives the driven arm 2 and the second shaft 5 to rotate around the fixed shaft 6 while the transmission mechanism 3 swings. Figure 4 and 7In the figure, the dotted part of the active arm 1 and the transmission mechanism 3 indicates the position passed during the rotation process. The first shaft body 4 and the second shaft body 5 are arranged vertically, so as to ensure that the direction conversion in the above process can be smoothly realized. The present invention has a simple structure, small clearance swing of the structure during the transmission process, stable transmission, not easy to damage, and strong flexibility and practicality.

[0033] One end of the driven arm 2 is fixedly sleeved on the second shaft 5, and the other end is provided with a connecting through hole 7 for cooperating with an external pull wire. The driven arm 2 is connected to the hydraulic control valve of the hydrostatic transmission (HST) of the rotary tiller through the connecting through hole 7. During assembly, the hydraulic control valve can be directly connected to the driven arm 2 by a pull wire. One end of the pull wire is fixedly connected to the hydraulic control valve, and the other end is fixedly connected to the driven arm 2 after passing through the connecting through hole 7. The pull wire is made of hard metal material, and the connection method between the pull wire and the connecting through hole 7 on the driven arm 2 is the same as the fixing method of the rope. Since the connecting through hole 7 is set at the end of the driven arm 2, the connecting through hole 7 can be used as a fixing ring. After the end of the pull wire passes through the connecting through hole 7, it is wound back to the pull wire body for several turns. Since the pull wire is made of hard metal material, the end of the pull wire can be fixed after being wound around the pull wire body for several turns. In actual use, the operator drives the active arm 1 to rotate by turning the steering wheel, the active arm 1 drives the transmission mechanism 3 to rotate, the transmission mechanism 3 drives the driven arm 2 and the second shaft 5 to rotate around the fixed axis 6, the driven arm 2 drives the pull wire to move, the pull wire adjusts the output flow and flow direction of the variable pump by controlling the state of the hydraulic control valve, so that the hydraulic energy can drive the motor in a predetermined direction, thereby realizing the steering of the vehicle.

[0034] like Figures 1 to 5 As shown, the transmission mechanism 3 includes a fixed part 301 and a movable part 302. The fixed part 301 is fixed on the second shaft body 5. The upper end of the movable part 302 is slidably connected to the active arm 1, and the lower end is movably connected to the fixed part 301. The fixed part 301 mainly connects the movable part 302 to the second shaft body 5. The top of the movable part 302 is triangular in shape as a whole, and the edges are rounded. The use of this structure can reduce the weight of the movable part 302 and ensure that the active arm 1 can flexibly drive the transmission mechanism 3 to rotate.

[0035] The upper end of the movable member 302 is slidably connected to the active arm 1 to ensure that the movable member 302 can adapt to the rotation of the active arm 1. Specifically, when the active arm 1 rotates, the distance between the active arm 1 and the lower end of the transmission mechanism 3 becomes farther. If the active arm 1 is fixedly connected to the transmission mechanism 3, the rotation cannot be achieved; if the upper end of the movable member 302 is slidably connected to the active arm 1, the end of the active arm 1 can slide along the upper end of the movable member 302 when the active arm 1 rotates, so as to adapt to the distance between the active arm 1 and the lower end of the transmission mechanism 3, and further achieve rotation.

[0036] like Figures 1 to 6As shown, in this embodiment, in order to ensure the stable transmission of the device, the lower end of the movable member 302 is rotatably arranged on the fixed member 301; the top of the movable member 302 is provided with a first sliding mechanism 8, the active arm 1 is provided with a second sliding mechanism 9, and the first sliding mechanism 8 and the second sliding mechanism 9 are slidably connected. Specifically, the fixed member 301 includes a fixed plate 311 and a fixed sleeve 312, the bottom of the fixed plate 311 is fixedly connected to the second shaft 5, and the fixed sleeve 312 is fixed on the plate surface of the fixed plate 311 away from the side of the driven arm 2. The movable member 302 includes a movable block 321 and a movable shaft 322 fixed at the bottom of the movable block 321, the top of the movable block 321 is provided with a first sliding mechanism 8, the active arm 1 is provided with a second sliding mechanism 9, and the first sliding mechanism 8 and the second sliding mechanism 9 are slidably connected. Among them, the first sliding mechanism 8 is a strip hole vertically opened on the movable block 321, and the second sliding mechanism 9 is a column, one end of the column is fixedly connected to the active arm 1, and the other end is vertically embedded in the strip hole, and the column and the strip hole are in clearance. The strip hole can not only be used as a slideway, but also as a weight-reducing hole to reduce weight. The movable shaft 322 is rotatably connected in the fixed sleeve 312. When the active arm 1 rotates to drive the movable part 302 to rotate, the movable part 302 can rotate in the fixed sleeve 312, ensuring that the transmission of the device is more flexible. During actual installation, a circle of protrusions 10 can be set at the lower end of the movable shaft 322, and a circle of grooves 11 can be opened on the inner wall of the movable sleeve. The height and depth of the groove 11 match the protrusion 10 to ensure that the movable shaft 322 does not fall off and can rotate after the protrusion 10 is embedded in the groove 11.

[0037] In other embodiments of the present invention, the first sliding mechanism 8 and the second sliding mechanism 9 can also adopt the form of a slide rail and a slider, for example, the first sliding mechanism 8 is a slide rail and the second sliding mechanism is a slider, but this method will increase the overall weight of the device and the manufacturing process is more complicated. Therefore, the present invention preferably has a bar-shaped hole for the first sliding mechanism 8 and a column for the second sliding mechanism 9.

[0038] Example 2

[0039] The structure of this embodiment is basically the same as that of embodiment 1, and the only difference is that the connection method of the transmission mechanism 3 is different.

[0040] like Figures 1 to 6 , Figure 7As shown, in this embodiment, in order to reduce the vertical height of the entire device while ensuring the normal rotation of the active arm 1, the movable shaft 322 is arranged in the movable sleeve in a telescopic rotation manner. In actual design, this embodiment can increase the height of the groove 11 in Example 1, so that the movable shaft 322 can be moved up and down to achieve telescopic movement while rotating in the fixed sleeve 312. Specifically, a circle of protrusions 10 is provided at the lower end of the movable shaft 322, and a circle of grooves 11 is opened on the inner wall of the movable sleeve. The depth of the grooves 11 matches the protrusions 10, and the height of the grooves 11 is greater than the height of the protrusions 10 and less than the depth of the movable sleeve, so as to ensure that the movable shaft 322 does not fall off after the protrusions 10 are embedded in the grooves 11 and can be rotated and telescoped in the movable sleeve.

[0041] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the scope of the present invention should be included in the protection scope of the present invention.

Claims

1. A direction rotation mechanism, characterized in that: The invention comprises an active arm (1), a driven arm (2), a transmission mechanism (3), a first shaft (4) and a second shaft (5); one end of the active arm (1) is rotatably connected to the first shaft (4), and the other end is movably connected to the upper end of the transmission mechanism (3); the lower end of the transmission mechanism (3) is fixedly connected to the second shaft (5), and one end of the driven arm (2) is also fixedly connected to the second shaft (5); the active arm (1) rotates on a horizontal plane, driving the transmission mechanism (3) and the driven arm (2) to rotate on a vertical plane.

2. The direction rotation mechanism according to claim 1, characterized in that: The transmission mechanism (3) comprises a fixed part (301) and a movable part (302); the fixed part (301) is fixed on the second shaft (5); the upper end of the movable part (302) is slidably connected to the active arm (1), and the lower end is movably connected to the fixed part (301).

3. The direction rotation mechanism according to claim 2, characterized in that: The lower end of the movable member (302) is rotatably arranged on the fixed member (301); a first sliding mechanism (8) is arranged on the top of the movable member (302); a second sliding mechanism (9) is arranged on the active arm (1); and the first sliding mechanism (8) and the second sliding mechanism (9) are slidably connected.

4. The direction rotation mechanism according to claim 2 or 3, characterized in that: The top of the movable part (302) is triangular in shape as a whole, and the edges are rounded.

5. The direction rotation mechanism according to claim 1, 2 or 3, characterized in that: The first shaft body (4) and the second shaft body (5) are arranged perpendicular to each other.

6. The direction rotation mechanism according to claim 4, characterized in that: The first shaft body (4) and the second shaft body (5) are arranged perpendicular to each other.

7. The direction rotation mechanism according to claim 1, 2, 3 or 6, characterized in that: The second shaft body (5) is a hollow structure, a fixed shaft (6) is arranged inside, and the fixed shaft (6) and the second shaft body (5) are clearance-matched.

8. The direction rotation mechanism according to claim 1, 2, 3 or 6, characterized in that: A connecting through hole (7) for cooperating with an external pull wire is provided on the other end of the driven arm (2).

Images