Ratchet wheel and pawl locking device

Abstract

The utility model relates to the field of pipe coiling device locking structures, and discloses a ratchet wheel and pawl locking device which comprises a mounting disc, a rotating disc is rotationally mounted on the inner ring of the mounting disc, a ratchet wheel side plate is arranged on the upper surface of the rotating disc, and the ratchet wheel side plate comprises two ratchet wheels II; a plurality of first ratchet wheels connected end to end are arranged at the inward ends of the two second ratchet wheels, the upper surfaces of the first ratchet wheels are obliquely designed to form cambered surfaces, the side faces of the first ratchet wheels protrude to form first locking parts, a mounting shaft is fixed to the mounting disc, the mounting shaft is rotationally sleeved with pawls and torsional springs, the lower ends of the torsional springs are connected with the pawls, and the lower ends of the torsional springs are connected with the first locking parts. An outer sleeve body is installed on the installation shaft, the upper end of the torsion spring is connected with the outer sleeve body, by changing the structure of the ratchet wheel side plate and the structure of the pawl, the contact area of the ratchet wheel side plate and the pawl is small when the ratchet wheel side plate rotates, the ratchet wheel side plate and the pawl do not make contact at all according to needs, and therefore abrasion and noise are reduced.

Description

Technical Field

[0001] The utility model relates to the field of a hose reel locking structure, in particular to a ratchet pawl locking device. Background Art

[0002] When the cable winder is in use, the hose needs to be locked in a fixed position for easy use, so that the hose can be pulled out and will not rebound when it is unwound. The current ratchet pawl method uses a pawl plate and a ratchet plate in combination, and the combination of the two is fixed by a main shaft. The current ratchet pawl uses many components in the structure, and the combination stability is low. In use, the ratchet pawl has a small contact surface and is unstable. In the return stroke, the pawl slides on the back of the ratchet teeth, which is easy to wear and produce a lot of noise. In terms of cost, the current ratchet pawl structure is too expensive. For this reason, we designed a ratchet pawl locking device. Utility Model Content

[0003] In order to solve the technical problems of the existing complex structure, easy wear and high noise, the utility model provides a ratchet pawl locking device.

[0004] The utility model is implemented by the following technical scheme: a ratchet pawl locking device comprises a mounting plate, a rotating plate is rotatably mounted on the inner ring of the mounting plate, a ratchet side plate is arranged on the upper surface of the rotating plate, wherein the ratchet side plate comprises two ratchet wheels 2, a plurality of ratchet wheels 1 connected end to end are arranged on the inner end of the two ratchet wheels 2, the upper surface of the ratchet wheel 1 is inclined to form an arc surface, and a locking portion 1 is formed on the side surface of the ratchet wheel 1;

[0005] A mounting shaft is fixed on the mounting plate, a pawl and a torsion spring are rotatably sleeved on the mounting shaft, and the lower end of the torsion spring is connected to the pawl, an outer sleeve is installed on the mounting shaft, and the upper end of the torsion spring is connected to the outer sleeve.

[0006] As a further improvement of the above scheme, the ratchet wheel 2 is vertically designed at one end away from the ratchet wheel 1 to form a locking part 2. When it rotates counterclockwise, the locking part 2 will contact and abut the locking part, and the pawl is prevented by the elastic pressure strip from rotating clockwise, thereby locking the rotating disk. The connection between the locking part 2 and the outer surface of the ratchet wheel 2 is chamfered to form a moving arc surface. When the rotating disk rotates clockwise, the moving arc surface can move along the contact surface and push the pawl in the counterclockwise direction, reducing wear during contact and facilitating the rotation of the ratchet side plate.

[0007] As a further improvement of the above scheme, the arc-shaped structure of the upper end of the pawl is designed to form a pressing portion, and the pressing portion can be pressed downward to make the pawl disengage from the contact with the ratchet side plate, thereby facilitating the unwinding or rewinding of the rotating disk without causing wear and noise. The lower side surface of the pawl is inclined to form a contact portion, and the contact portion and the bottom end of the pawl are connected with a rounded corner to form an arc surface. The design of the contact portion enables the pawl to be deflected counterclockwise when the rotating disk and the ratchet side plate rotate clockwise, thereby facilitating the rotation of the rotating disk, and there is a certain resistance between the two, so that the hose is not easy to unwind when unwinding, and the design of the arc surface reduces wear and noise. The back of the pawl is directly designed to form a locking portion. When the pawl rotates clockwise, its upper side is blocked and cannot deflect, thereby playing a locking role.

[0008] As a further improvement of the above scheme, an elastic strip is arranged above the mounting plate, and the pressing portion designed on the top of the ratchet contacts the lower surface of the elastic strip, and the elastic strip as a whole has a tendency to rotate clockwise. When the elastic strip is pressed downward, the ratchet disengages from the contact with the ratchet side plate. At this time, the rotating disk can rotate clockwise or counterclockwise, while when it is not pressed, it can only rotate clockwise and cannot rotate counterclockwise, that is, the hose can only be unwound but not reeled.

[0009] As a further improvement of the above scheme, a contact bevel is provided at the connection between the ratchet 2 and the ratchet 1 on the right side, and the connection between the locking part and the bottom end of the pawl is inclined toward the bottom to form a connecting bevel, and the bottom end of the connecting bevel is chamfered. The design of the contact bevel increases the contact area between the locking part 2 and the locking part when the ratchet side plate rotates counterclockwise, thereby improving the locking effect, and the design of the connecting bevel reduces wear and noise.

[0010] As a further improvement of the above scheme, when the elastic strip is in the initial state, the bottom end of the pawl is below the surface of the second outer ring of the ratchet. When the elastic strip is not pressed, the contact portion will contact the surface of the ratchet side plate. The pawl is interfered by the elastic strip above and can only rotate counterclockwise. When it rotates clockwise, there is no space above it to deflect. At this time, the ratchet side plate can rotate clockwise but not counterclockwise.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. The utility model changes the structure of the ratchet side plate and the pawl, so that the contact area between the ratchet side plate and the pawl is small when the ratchet side plate rotates, and the ratchet side plate and the pawl can also be completely out of contact as needed, thereby reducing wear and noise;

[0013] 2. The overall structure of the device is simple, and it has two operating modes when unwinding, which can quickly perform unwinding or rewinding operations. No matter which mode is used, it can reduce wear and noise and increase service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the overall structure of the ratchet pawl locking device provided by the utility model;

[0015] Figure 2 for Figure 1 A schematic diagram of a top view structure;

[0016] Figure 3 for Figure 1 A schematic diagram of the structure of the middle rotating disc and the ratchet side plate;

[0017] Figure 4 for Figure 1 Schematic diagram of the structure of the middle pawl and torsion spring.

[0018] Description of main symbols:

[0019] 1. Mounting plate; 2. Rotating plate; 3. Ratchet side plate; 31. Ratchet one; 311. Locking part one; 32. Ratchet two; 321. Locking part two; 322. Moving arc surface; 4. Ratchet pawl; 41. Pressing part; 42. Contact part; 43. Locking part; 5. Outer casing; 6. Elastic pressure strip; 7. Mounting shaft; 8. Torsion spring. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0021] Example:

[0022] Please combine Figure 1-Figure 4 The ratchet pawl locking device of this embodiment includes a mounting plate 1, a rotating plate 2 is rotatably mounted on the inner ring of the mounting plate 1, a ratchet side plate 3 is arranged on the upper surface of the rotating plate 2, wherein the ratchet side plate 3 includes two ratchet wheels 2 32, and a plurality of ratchet wheels 1 31 connected end to end are arranged at the inner end of the two ratchet wheels 2 32, the upper surface of the ratchet wheel 1 31 is inclined to form an arc surface, and the side of the ratchet wheel 1 31 is protruded to form a locking portion 1 311;

[0023] A mounting shaft 7 is fixed on the mounting plate 1 , a pawl 4 and a torsion spring 8 are rotatably sleeved on the mounting shaft 7 , and the lower end of the torsion spring 8 is connected to the pawl 4 , an outer sleeve 5 is mounted on the mounting shaft 7 , and the upper end of the torsion spring 8 is connected to the outer sleeve 5 .

[0024] The ratchet wheel 2 32 is vertically designed at one end away from the ratchet wheel 1 31 to form a locking portion 2 321. When it rotates counterclockwise, the locking portion 2 321 will contact and abut the locking portion 43, and the pawl 4 is prevented from rotating clockwise by the elastic pressure strip 6, thereby being able to lock the rotating disk 2. The chamfered corner design at the connection between the locking portion 2 321 and the outer surface of the ratchet wheel 2 32 forms a moving arc surface 322. When the rotating disk 2 rotates clockwise, the moving arc surface 322 can move along the contact surface and push the pawl 4 in the counterclockwise direction, reducing wear during contact and facilitating the rotation of the ratchet side plate 3.

[0025] The arc-shaped structure of the upper end of the pawl 4 is designed to form a pressing portion 41. Pressing the pressing portion 41 downward can make the pawl 4 disengage from the contact with the ratchet side plate 3, thereby facilitating the unwinding or rewinding of the rotating disk 2 without causing wear and noise. The lower side surface of the pawl 4 is designed to have an inclined surface to form a contact portion 42, and the contact portion 42 is connected to the bottom end of the pawl 4 at a chamfered corner to form an arc-shaped surface. The design of the contact portion 42 enables the pawl 4 to be deflected counterclockwise when the rotating disk 2 and the ratchet side plate 3 rotate clockwise, thereby facilitating the rotation of the rotating disk 2, and there is a certain resistance between the two, so that the hose is not easy to unwind when unwinding, and the design of the arc-shaped surface reduces wear and noise. The back surface of the pawl 4 is designed to form a locking portion 43. When the pawl 4 rotates clockwise, its upper side is blocked and cannot be deflected, thereby achieving a locking effect.

[0026] An elastic strip 6 is arranged above the mounting disk 1, and the pressing portion 41 designed on the top of the pawl 4 contacts with the lower surface of the elastic strip 6, and the elastic strip 6 as a whole has a tendency to rotate clockwise. The elastic strip 6 is pressed downward, and the pawl 4 is disengaged from the contact with the ratchet side plate 3. At this time, the rotating disk 2 can rotate clockwise or counterclockwise, while it can only rotate clockwise when not pressed, and cannot rotate counterclockwise, that is, the hose can only be unwound but not reeled.

[0027] A contact slope is provided at the connection between the right ratchet wheel 2 32 and the ratchet wheel 1 31. The connection between the locking part 43 and the bottom end of the pawl 4 is inclined toward the bottom to form a connecting slope, and the bottom end of the connecting slope is chamfered. The design of the contact slope increases the contact area between the locking part 2 321 and the locking part 43 when the ratchet side plate 3 rotates counterclockwise, thereby improving the locking effect. The design of the connecting slope reduces wear and noise.

[0028] When the elastic strip 6 is in the initial state, the bottom end of the pawl 4 is below the outer ring surface of the ratchet 2 32. When the elastic strip 6 is not pressed, the contact portion 42 will contact the surface of the ratchet side plate 3. The pawl 4 is interfered by the elastic strip 6 above and can only rotate counterclockwise. When it rotates clockwise, there is no space above it to deflect. At this time, the ratchet side plate 3 can rotate clockwise but not counterclockwise.

[0029] The implementation principle of the ratchet pawl locking device in the embodiment of the present application is as follows: when the device is in use, a main shaft is fixed at the axis of the rotating disk 2, and the hose can be wound on the main shaft (a cover plate is also installed in the front of the device, and a notch is set on the cover plate, and the elastic strip 6 is located below the notch). When the hose is unwound, the hose is directly pulled to make the main shaft, the rotating disk 2 and the ratchet side plate 3 rotate clockwise. Since the elastic strip 6 has a clockwise rotation tendency as a whole, the contact portion 42 of the pawl 4 can contact the outer ring surface of the ratchet side plate 3, and the arc surface, connecting inclined surface and moving arc surface 322 are set, so that the overall wear degree of the pawl 4 is small and the noise is low when the ratchet side plate 3 contacts. The pawl 4 is interfered by the elastic strip 6 above, and can only rotate counterclockwise. When it rotates clockwise, there is no space above it to deflect. At this time, the ratchet side plate 3 can rotate clockwise but cannot rotate counterclockwise, that is, the hose can only be unwound and cannot be rewound and rebound;

[0030] When in use, the elastic pressure strip 6 can also be pressed downward, which can make the pawl 4 disengage from the ratchet side plate 3, thereby facilitating the unwinding or winding of the rotating disk 2 without causing wear and noise.

[0031] By changing the structure of the ratchet side plate 3 and the pawl 4, the contact area between the ratchet side plate 3 and the pawl 4 is reduced when the ratchet side plate 3 rotates, and the ratchet side plate 3 and the pawl 4 can be completely out of contact as required, thereby reducing wear and noise;

[0032] The device has a simple overall structure and has two operating modes when unwinding, which enables fast unwinding or rewinding operations. No matter which mode is used, wear and noise can be reduced, and the service life can be increased.

[0033] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A ratchet pawl locking device, comprising a mounting plate (1), characterized in that: The inner ring of the mounting plate (1) is rotatably mounted with a rotating plate (2), and the upper surface of the rotating plate (2) is provided with a ratchet side plate (3), wherein the ratchet side plate (3) comprises two ratchet wheels (32), and the inner ends of the two ratchet wheels (32) are each provided with a plurality of ratchet wheels (31) connected end to end, and the upper surface of the ratchet wheel (31) is inclined to form an arc surface, and the side surface of the ratchet wheel (31) is protruding to form a locking portion (311); A mounting shaft (7) is fixed on the mounting plate (1), a ratchet (4) and a torsion spring (8) are rotatably sleeved on the mounting shaft (7), and the lower end of the torsion spring (8) is connected to the ratchet (4), an outer sleeve (5) is mounted on the mounting shaft (7), and the upper end of the torsion spring (8) is connected to the outer sleeve (5).

2. The ratchet pawl locking device according to claim 1, characterized in that: The second ratchet (32) is vertically designed to be away from one end of the first ratchet (31) to form a second locking portion (321), and the connection between the second locking portion (321) and the outer surface of the second ratchet (32) is chamfered to form a moving arc surface (322).

3. The ratchet pawl locking device according to claim 1, characterized in that: The arc-shaped structure at the upper end of the pawl (4) is designed to form a pressing portion (41), the inclined surface of the lower side surface of the pawl (4) is designed to form a contact portion (42), the straight surface of the back side of the pawl (4) is designed to form a locking portion (43), and the chamfered corner at the connection between the contact portion (42) and the bottom end of the pawl (4) is designed to form an arc surface.

4. The ratchet pawl locking device according to claim 3, characterized in that: An elastic pressure strip (6) is arranged above the mounting plate (1), a pressing portion (41) designed on the top of the ratchet (4) contacts the lower surface of the elastic pressure strip (6), and the elastic pressure strip (6) as a whole has a clockwise rotation tendency.

5. The ratchet pawl locking device according to claim 4, characterized in that: A contact slope is provided at the connection between the ratchet wheel 2 (32) and the ratchet wheel 1 (31) on the right side, and the connection between the locking portion (43) and the bottom end of the ratchet pawl (4) is designed to be inclined toward the bottom to form a connection slope, and the bottom end of the connection slope is rounded.

6. The ratchet pawl locking device according to claim 4, characterized in that: When the elastic pressure strip (6) is in an initial state, the bottom end of the pawl (4) is located below the outer ring surface of the second ratchet wheel (32).

Images