An angle-limited force value transmission device with a protection function

Abstract

The present invention relates to a limited-angle force transmission device with a protection function, which includes a protection member and a tensioning mechanism for tensioning a belt. The tensioning mechanism can be turned over up and down, and its upper end is slidably connected to the lower end of a pull rod. The protection member is slidably sleeved on the lower end of the pull rod, and its two ends are respectively abutted against the upper end of the tensioning mechanism and the lower end of the pull rod, and is used to twist and break the belt when the belt is tilted so as to restore the belt to the disconnected state. The beneficial effect of the present invention is that it can not only achieve the tension adjustment of the belt to ensure the running state of the belt, but also prevent the belt from tilting, avoid the fly-out of the belt pulley and cause secondary injuries, and is safe and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission mechanisms, and particularly relates to an angle-limiting force value transmission device with a protection function. Background Art

[0002] In the tensioning part of a transmission mechanism, a tensioning rod and a shock-absorbing spring are generally required. In the belt drive of the transmission structure, during actual operation, due to problems such as deformation of the support shaft and falling off of bearing balls, the pitch surface of the transmission belt will be inclined. The existing transmission belt tensioning mechanism can only be adjusted along the tensioning direction, and the adjustment of the tensioning mechanism cannot protect the belt from tilting during operation. If the tensioning surface is inclined, it will directly cause eccentric wear of the tensioning mechanism. Seriously, the inclined belt may drive the inclined pulley to fly out, causing secondary injuries. Moreover, the inclined operation of the belt is often not easily detected, and it requires the operator to smell an abnormal smell and hear an abnormal noise before performing maintenance. At this time, the belt has basically failed and may even cause serious accidents. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an angle-limiting force value transmission device with a protection function, aiming to solve the above technical problems.

[0004] The technical solution of the present invention for solving the above technical problems is as follows:

[0005] An angle-limiting force value transmission device with a protection function includes a protection member and a tensioning mechanism for tensioning a belt. The tensioning mechanism can be turned up and down, and its upper end is slidably connected to the lower end of a rod. The protection member is slidably sleeved on the lower end of the rod, and its two ends are respectively in contact with the upper end of the tensioning mechanism and the lower end of the rod, and is used to twist and break when the belt is inclined to restore the belt to the disconnected state.

[0006] The beneficial effects of the present invention are as follows: During use, the rod is manually pushed and pulled to drive the tensioning mechanism to adjust the tension of the belt. When the tensioning surface of the belt is inclined, it drives the tensioning mechanism to be inclined, and makes the axis of the rod deviate from the axis of the protection member. The rod presses the inner wall of the protection member to cause the protection member to twist and break. At this time, the rod returns to its original position, so that the belt is restored to the disconnected state, protecting the belt. The present invention can not only achieve the tension adjustment of the belt to ensure the operation state of the belt, but also prevent the belt from tilting, avoid secondary injuries caused by the pulley flying out, and is safe and reliable.

[0007] On the basis of the above technical solution, the present invention can be further improved as follows.

[0008] Further, the protection member is a protection cylinder with both ends open, and the protection cylinder is coaxially slidably sleeved on the lower end of the rod.

[0009] The beneficial effects of adopting the above further scheme are as follows: the structure is simple and the design is reasonable. The lower end of the protective cylinder is in sliding fit with the pull rod. When the tension surface of the belt is inclined, the protective cylinder will crack, so that the belt is restored to a state where the tension surface is parallel, protecting the belt.

[0010] Furthermore, at least one pre-crack is provided at at least one end of the protective cylinder.

[0011] The beneficial effects of adopting the above further scheme are as follows: the structure is simple and the design is reasonable, making the protective cylinder easy to crack when it is twisted, thus better protecting the belt.

[0012] Furthermore, the pre-cracks are respectively provided at both ends of the protective cylinder, and the two pre-cracks are arranged oppositely.

[0013] The beneficial effects of adopting the above further scheme are as follows: the protective cylinder is easier to crack, and can better protect the belt.

[0014] Furthermore, the protective member is made of ceramic material.

[0015] The beneficial effects of adopting the above further scheme are as follows: ceramics have the characteristics of high compressive strength, while relatively low tensile, bending and impact strengths, and are easy to crack when twisted, so as to protect the belt, and the cost is relatively low.

[0016] Furthermore, a limit nut is threadedly connected to the lower end of the pull rod, and one end of the protective member abuts against the limit nut.

[0017] The beneficial effects of adopting the above further scheme are as follows: the structure is simple, convenient for disassembling and assembling the protective member, saving time and effort.

[0018] Furthermore, the tensioning mechanism includes a tensioning frame that can be turned up and down. The upper end of the tensioning frame is slidably connected to the lower end of the pull rod. The belt passes through the tensioning frame, and both sides thereof are respectively close to both sides of the tensioning frame. A tensioning wheel is rotatably installed at a position below the belt in the tensioning frame, and the tensioning wheel is in contact with the lower side of the belt. The tensioning frame is turned up and down to drive the tensioning wheel to be in contact with or separated from the belt, so as to tension the belt.

[0019] The beneficial effects of adopting the above further scheme are as follows: during use, manually push and pull the pull rod to drive the tensioning frame to turn up and down, so that the tensioning wheel is in contact with or separated from the belt, so as to tension the belt, thereby adjusting the tension of the belt, and the operation is simple.

[0020] Furthermore, the tensioning frame is a bent frame body, and the tensioning wheel is located at the bent part of the tensioning frame.

[0021] The beneficial effects of adopting the above further scheme are as follows: the structure is simple and the design is reasonable. It can not only tension the belt, but also save space.

[0022] Further, it further includes a limiting rod for limiting the belt, and one end of the limiting rod extends to one side above the belt and is close to the belt.

[0023] The beneficial effect of adopting the above further solution is that when the belt is running, the limiting rod plays a role in preventing the belt from slipping out of the belt groove; when the tensioning mechanism is loosened, through the limitation of the limiting rod, the belt can be separated from the pulley as soon as possible, preventing the occurrence of the linkage phenomenon of the driven pulley.

[0024] Further, the upper end of the pull rod is connected to the control handle through a tension spring.

[0025] The beneficial effect of adopting the above further solution is that the connection between the control handle and the tensioning mechanism can be realized through the tension spring, and at the same time, it can also play an effective shock-absorbing role. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of the present invention;

[0027] Figure 2 is Figure 1 an enlarged view of A in

[0028] Figure 3 is a schematic structural diagram of the first state when the present invention is applied;

[0029] Figure 4 is a schematic structural diagram of the second state when the present invention is applied;

[0030] Figure 5 is a schematic structural diagram of the first embodiment of the protection member in the present invention;

[0031] Figure 6 is a schematic structural diagram of the second embodiment of the protection member in the present invention;

[0032] Figure 7 is a state diagram of the protection member under force in the present invention.

[0033] In the drawings, the list of components represented by each reference numeral is as follows:

[0034] 1. Protection member, 2. Belt, 3. Pull rod, 4. Control handle, 5. Pre-crack, 6. Limit nut, 7. Tensioning frame, 8. Tensioning pulley, 9. Limiting rod, 10. Tension spring, 11. Tensioning seat. DETAILED DESCRIPTION OF THE INVENTION

[0035] The principles and features of the present invention will be described below in conjunction with the accompanying drawings and specific embodiments. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0036] Such as Figures 1 to 7As shown in the figure, the present invention provides a limited-angle force value transmission device with a protection function, which includes a protection member 1 and a tensioning mechanism for tensioning a belt 2. The tensioning mechanism can be turned over up and down, and its upper end is slidably connected to the lower end of a pull rod 3; the protection member 1 is slidably sleeved on the lower end of the pull rod 3, and its two ends are respectively abutted against the upper end of the tensioning mechanism and the lower end of the pull rod 3, and is used to restore the belt 2 to the disconnected state when the belt 2 is twisted and broken when it is inclined. During use, the pull rod 3 is manually pushed and pulled to drive the tensioning mechanism to adjust the tension of the belt 2; when the tensioning surface of the belt 2 is inclined, it drives the tensioning mechanism to be inclined, and makes the axis of the pull rod 3 deviate from the axis of the protection member 1. The pull rod 3 presses the inner wall of the protection member 1 to cause the protection member 1 to be torsionally broken. At this time, the pull rod 3 returns to its original position, so that the belt 2 is restored to the disconnected state, protecting the belt 2. The present invention can not only realize the tension adjustment of the belt 2 to ensure the running state of the belt 2, but also prevent the belt 2 from tilting, avoid the fly-out of the belt pulley and cause secondary injuries, and is safe and reliable.

[0037] The above disconnected state is equivalent to: the upper tensioning mechanism is still in the locked state, but the lower belt 2 has become slack, and the rod tensioning mechanism cannot play a tensioning role.

[0038] Embodiment 1

[0039] On the basis of the above structure, in this embodiment, the protection member 1 is a protection cylinder with both ends open. The protection cylinder is coaxially slidably sleeved on the lower end of the pull rod 3. The structure is simple and the design is reasonable. The protection cylinder is slidably matched with the lower end of the pull rod 3. When the tensioning surface of the belt 1 is inclined, the protection cylinder will be broken to release the tensioning mechanism, so that the belt 1 is restored to the state where the tensioning surface is parallel, protecting the belt 2.

[0040] Embodiment 2

[0041] On the basis of Embodiment 1, in this embodiment, at least one pre-crack 5 is provided on at least one end of the protection cylinder. The structure is simple and the design is reasonable, making the protection cylinder easy to break when it is torsionally twisted, so as to better protect the belt 2.

[0042] Embodiment 3

[0043] On the basis of Embodiment 2, preferably, in this embodiment, pre-cracks 5 are respectively provided on both ends of the protection cylinder, and the two pre-cracks 5 are arranged oppositely, making the protection cylinder easier to break and being able to better protect the belt 2.

[0044] In addition to the above embodiments, one or more pre-cracks 5 may be provided at any one end of the protective cylinder. For example, only one pre-crack 5 is provided at any one end of the protective cylinder, or two or even more pre-cracks 5 may be provided at any one end of the protective cylinder. When the number of pre-cracks 5 is two, it is preferably arranged oppositely to facilitate the rapid rupture of the protective cylinder. At the same time, a plurality of pre-cracks 5 may also be provided at both ends of the protective cylinder. The number of pre-cracks 5 at both ends of the protective cylinder may be the same or different. When they are the same, it is preferably arranged pairwise oppositely, which is more conducive to the rupture of the protective cylinder.

[0045] Example 4

[0046] On the basis of the above structure, in this embodiment, the protective member 1 is made of ceramic material. Ceramics have the characteristics of high compressive strength, while relatively low tensile, bending and impact strength, and are prone to rupture when twisted, so as to protect the belt 2, and the cost is relatively low.

[0047] The above solution utilizes the anisotropic characteristics of ceramics (compressive but not torsional characteristics). Within a certain inclination angle range of the rotating surface of the belt 2, normal tension can be ensured. When a large inclination occurs on the driving surface of the belt 2, the ceramic will rupture and the tensioning mechanism will loosen. Ceramics are compressive but not torsional, and the thickness of the ceramic and the shape of the pre-crack 5 can play a role in limiting the torsional angle.

[0048] The above protective member 1 uses ceramics as raw materials. By utilizing the characteristics of the ceramic material itself, the angle of force value transmission can be limited. The initial angle is within the cone range marked by the middle solid line. By reducing the pre-crack 5, or even canceling the pre-crack 5 at this place, the protection range of the force value can be expanded to the cone range marked by the dotted line (see Figure 7 ).

[0049] Example 5

[0050] On the basis of the above structure, in this embodiment, a threaded section is provided at the lower end of the pull rod 3, and a limit nut 6 is threadedly connected to the threaded section. One end of the protective member 1 abuts against the limit nut 6. The structure is simple, convenient for disassembling and assembling the protective member 1, and time-saving and labor-saving.

[0051] Example 6

[0052] On the basis of the above structure, in this embodiment, the tensioning mechanism includes a tensioning frame 7 that can be turned over up and down. The lower end of the tensioning frame 7 is rotatably connected to a tensioning seat 11 on the vehicle chassis through a rotating shaft, and the tensioning seat 11 is fixedly installed on the vehicle chassis by bolts; the upper end of the tensioning frame 7 is slidably connected to the lower end of the pull rod 3, and the belt 2 passes through the tensioning frame 7, and both sides thereof are respectively close to both sides of the tensioning frame 7; a tensioning wheel 8 is rotatably installed at a position below the belt 2 in the tensioning frame 7, and the tensioning wheel 8 is rotatably connected to the tensioning frame 7 through a rotating shaft, and it is in contact with the lower side of the belt 2; the tensioning frame 7 is turned over up and down to drive the tensioning wheel 8 to be in contact with or separated from the belt 2, so as to tension the belt 2. When in use, manually push and pull the pull rod 3 to drive the tensioning frame 7 to turn over up and down, so that the tensioning wheel 8 is in contact with or separated from the belt 2, so as to tension the belt 2, thereby adjusting the tension of the belt 2, and the operation is simple.

[0053] The upper end of the above-mentioned tensioning frame 7 is provided with a through hole penetrating inside and outside, and the lower end of the pull rod 3 passes through the through hole and extends into the tensioning frame 7, and the protective member 1 is located on the part of the pull rod 3 located inside the tensioning frame 7.

[0054] Embodiment 7

[0055] On the basis of Embodiment Six, in this embodiment, the tensioning frame 7 is a bent frame body, and the tensioning wheel 8 is located at the bent part of the tensioning frame 7. The structure is simple and the design is reasonable. It can not only tension the belt 2, but also save space.

[0056] Embodiment 8

[0057] On the basis of Embodiment Six, this embodiment further includes a limiting rod 9 for limiting the belt 2. One end of the limiting rod 9 extends to one side above the belt 2 and is close to the belt 2. When the belt 2 runs, the limiting rod 9 plays a role in preventing the belt 2 from slipping out of the pulley groove; when the tensioning mechanism is loosened, through the limitation of the limiting rod 9, the belt 2 can be separated from the pulley as soon as possible, preventing the occurrence of the linkage phenomenon of the driven pulley.

[0058] The above-mentioned driven pulley

[0059] Preferably, the above-mentioned limiting rod 9 is parallel to the belt 2 for better limiting the belt 2; in addition, the above-mentioned limiting rod 9 is fixed to the vehicle chassis by bolts.

[0060] Embodiment 9

[0061] On the basis of Embodiment Six, in this embodiment, the pull rod 3 is connected to the control handle 4 through a tension spring 10. Both ends of the tension spring 10 are respectively buckled with the control handle 4 and the upper end of the pull rod 3, and round holes for cooperating with both ends of the tension spring 10 are respectively provided on the upper end of the pull rod 3 and the corresponding part of the control handle 4. When in use, through the tension spring 10, the connection between the control handle 4 and the tensioning mechanism can be realized, and at the same time, an effective shock absorption effect can be achieved.

[0062] The working principle of the present invention is as follows:

[0063] During use, manually operate the control handle 4, and drive the tensioning frame 7 to flip up and down through the tension spring 10 and the pull rod 3, so that the tensioning wheel 8 is in contact with the belt 2 to adjust the tension of the belt 2; when the tension surface of the belt 2 is inclined, it drives the tensioning mechanism to incline, causing the protective member 1 to twist and break, so as to release the tensioning mechanism, and the belt 2 returns to a parallel state to protect the belt 2.

[0064] At present, there is no such type of protection device on the market. The belt 2 is both a transmission tool. Compared with the input and output structures of the belt 2, the belt 2 itself is a protection device; however, for the joint belt, the joint belt is too strong, so a special protection device is required. From the working conditions of the joint belt, it can be inferred that special protection devices are required for all application working conditions of the belt 2.

[0065] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A limited-angle force value transmission device with a protection function, characterized in that: It includes a protective member (1) and a tensioning mechanism for tensioning a belt (2). The tensioning mechanism can be turned over up and down, and its upper end is slidably connected to the lower end of a pull rod (3); the protective member (1) is slidably sleeved on the lower end of the pull rod (3), and its two ends are respectively abutted against the upper end of the tensioning mechanism and the lower end of the pull rod (3), and is used for restoring the belt (2) to a disconnected state when the belt (2) is tilted and torsionally broken. The above-mentioned disconnected state is equivalent to: the upper tensioning mechanism is still in a locked state, but the lower belt (2) has become slack, and the tensioning mechanism cannot play a tensioning role. The protective member (1) is a protective cylinder with both ends open. The protective cylinder is coaxially and slidably sleeved on the lower end of the pull rod (3); at least one pre-crack (5) is provided at at least one end of the protective cylinder.

2. The limited-angle force value transmission device with a protection function according to claim 1, characterized in that: The pre-cracks (5) are respectively provided at both ends of the protective cylinder, and the two pre-cracks (5) are arranged oppositely.

3. The limited-angle force value transmission device with a protection function according to any one of claims 1-2, characterized in that: The protective member (1) is made of ceramic material.

4. The angle-limiting force value transmission device with a protection function according to any one of claims 1-2, characterized in that: A limit nut (6) is threadedly connected to the lower end of the pull rod (3), and one end of the protective member (1) is abutted against the limit nut (6).

5. The limited-angle force value transmission device with a protection function according to any one of claims 1-2, characterized in that: The tensioning mechanism includes a tensioning frame (7) that can be turned over up and down. The upper end of the tensioning frame (7) is slidably connected to the lower end of the pull rod (3). The belt (2) passes through the tensioning frame (7), and its two sides are respectively close to the two sides of the tensioning frame (7); a tensioning wheel (8) is rotatably installed at a position below the belt (2) inside the tensioning frame (7), and the tensioning wheel (8) is in contact with the lower side of the belt (2); turning the tensioning frame (7) up and down to drive the tensioning wheel (8) to be in contact with or separated from the belt (2) to tension the belt (2).

6. The angle-limited force value transmission device with a protection function according to claim 5, wherein: The tensioning frame (7) is a bent frame body, and the tensioning wheel (8) is located at the bend of the tensioning frame (7).

7. The angle-limited force value transmission device with a protection function according to claim 5, characterized in that: It also includes a limit rod (9) for limiting the belt (2). One end of the limit rod (9) extends to one side above the belt (2) and is close to the belt (2).

8. The limited-angle force value transmission device with a protection function according to any one of claims 1-2, characterized in that: The upper end of the pull rod (3) is connected to a control handle (4) through a tension spring (10).

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