A check valve

Abstract

The application discloses a kind of check stopper.Limiting teeth are provided on the locking member and engaged with the teeth of the first and second ratchet discs.At least two driving shafts are provided on the driving disc, and the driving shafts are inserted into the driven disc to drive the driven disc to rotate relative to the first and second ratchet discs and to drive the limiting teeth of at least one locking member to separate from the first or second ratchet disc.A reset member is connected between the locking member and the driven disc to elastically push the locking member against the first or second ratchet disc to block the rotation of the driven disc relative to the first or second ratchet disc.When the power source is removed, the reverse resistance generated by the driven components connected to the driven disc will be in contact with the teeth of the ratchet disc through the sliding contact of one locking member, which will be instantaneously disconnected, effectively preventing the reverse resistance generated by the driven components from being transmitted to the components in the power source through the driven disc, causing damage to the components in the power source or reducing the service life.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of backstop, in particular to a backstop. BACKGROUND

[0002] The backstop is a kind of transmission device that separates the driving shaft and the driven shaft by mechanical means, which can realize the driving shaft unrestricted forward or reverse rotation and drive the driven shaft to rotate synchronously, and vice versa, the driven shaft cannot rotate freely under the influence of the reverse torque of the load, which is a commonly used mechanism in the fields of equipment power transmission and non-standard machinery, and is used for the function of forward transmission and reverse torque blocking.

[0003] However, the current backstop can only block the driving shaft and the driven shaft in one direction, and when the driving shaft loses the power source, the reverse resistance generated by the driven shaft can only rotate in the preset direction, and the backstop will not produce the effect of power blocking after reverse rotation, so the application range of the backstop is narrow and has great limitations.

[0004] Therefore, there is still a need for a backstop to solve the above problems. SUMMARY

[0005] The present application provides a backstop to solve the above problems.

[0006] The purpose of the present application is achieved by the following technical scheme:

[0007] A backstop, comprising a first ratchet disc, a second ratchet disc, a driven disc, at least two locking members, a driving disc and a reset member.

[0008] The second ratchet disc and the first ratchet disc are coaxially stacked, and the teeth in the first ratchet disc and the teeth in the second ratchet disc are opposite. The driven disc is rotatably arranged on the inner side of the first ratchet disc. Two locking members are respectively located at different positions in the axial direction of the driven disc, and the locking members are provided with limiting teeth which are engaged with the teeth of the first ratchet disc and the second ratchet disc, one of the locking members is slidably abutted on the teeth on the inner side of the first ratchet disc, and the other locking member is slidably abutted on the teeth on the inner side of the second ratchet disc. The driving disc is provided with a driving shaft, the driving shaft is inserted into the driven disc, used to drive the driven disc to rotate relative to the first ratchet disc and the second ratchet disc, and to drive the limiting teeth of at least one locking member to separate from the first ratchet disc or the second ratchet disc.

[0009] The reset member is connected between the locking member and the driven disc, used to elastically push the locking member to abut against the first ratchet disc or the second ratchet disc to block, so as to prevent the driven disc from reversing relative to the first ratchet disc or the second ratchet disc.

[0010] In one embodiment, the driven disc is provided with a movable hole, the locking member is provided with a driving groove, the end of the driving shaft is slidably connected in the driving groove through the movable hole, the driving groove comprises a first position and a second position, when the end of the driving shaft is located in the first position, the limiting tooth and the first ratchet disc or the second ratchet disc are separated.

[0011] When the end of the driving shaft is located in the second position, the limiting tooth and the first ratchet disc or the second ratchet disc are slidably abutted.

[0012] In one embodiment, a driving surface is further provided between the first position and the second position, the driving shaft is switched between the first position and the second position through the driving surface, so as to drive the locking member to move along the radial direction of the driven disc.

[0013] In one embodiment, the projection length of the inclined surface in the moving direction of the locking member and the tooth height of the driving tooth are in the ratio of 1-1.5:1.

[0014] In one embodiment, the movable hole is a strip-shaped hole, the stem of the driving shaft is slidably connected in the strip-shaped hole, and the movable distance of the driving shaft in the strip-shaped hole is greater than or equal to the projection length of the inclined surface in the direction perpendicular to the moving direction of the locking member.

[0015] In one embodiment, the driven disc is provided with a sliding groove and a limiting assembly in communication with the strip-shaped hole, the locking member further comprises a sliding part connected with the limiting tooth, the sliding part is slidably connected in the sliding groove, and the limiting assembly is used to limit the locking member in the direction perpendicular to the moving direction of the locking member.

[0016] In one embodiment, the limiting assembly comprises a limiting plate and a bolt, the limiting plate is connected on the driven disc through the bolt and abuts against the locking member.

[0017] The driven disc further comprises a reset member, the reset member is connected in the sliding groove and is in a compressed state, and is used to elastically push the locking member to abut against the first ratchet disc or the second ratchet disc.

[0018] In one embodiment, the inner edge of the first ratchet disc away from the second ratchet disc is further provided with a first connecting groove, the periphery of the driven disc is provided with a second connecting groove, and the first connecting groove and the second connecting groove are slidably connected through a connecting strip.

[0019] Compared with the prior art, the beneficial effects of the present application at least include:

[0020] The teeth inside the two ratchet wheels arranged in stack are opposite to each other, the driving wheel is connected with the power source, the driving wheel drives the driven wheel to rotate clockwise or counterclockwise, at all times, one locking piece and the corresponding ratchet wheel are separated, and the other locking piece is always in sliding abutment with the corresponding ratchet wheel during rotation, when the power source is removed, the reverse resistance generated by the driven component connected with the driven wheel can be in abutment with the teeth of the ratchet wheel through the sliding abutment of one locking piece, and the reverse resistance generated by the driven component can be instantaneously cut off, so that the reverse resistance generated by the driven component is prevented from being transmitted to the components in the power source through the passive wheel, and the components in the power source are prevented from being damaged or the service life is reduced. Moreover, the resistance cut-off in this way is not limited by the rotation direction of the driving wheel, and the application range is wider. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structure diagram of a backstop of an embodiment of the present application;

[0022] Figure 2 is a transparent line frame structure diagram of a locking piece of the backstop of an embodiment of the present application;

[0023] Figure 3 is a radial section view of Figure 2 ;

[0024] Figure 4 is an exploded view of the backstop of an embodiment of the present application from one perspective;

[0025] Figure 5 is an exploded view of the backstop of an embodiment of the present application from another perspective;

[0026] Figure 6 is a structure diagram of the locking piece of an embodiment of the present application.

[0027] In the figure: 1, first ratchet wheel; 2, second ratchet wheel; 3, driven wheel; 31, movable hole; 4, locking piece; 41, limiting tooth; 42, driving groove; 421, first position; 422, second position; 43, driving surface; 5, driving wheel; 51, driving shaft; 6, reset piece; 8, sliding groove; 9, limiting assembly; 91, limiting plate; 92, bolt; 10, first connecting groove; 11, second connecting groove; 12, connecting strip. DETAILED DESCRIPTION

[0028] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments, however, can be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the inventive concept of example embodiments to those skilled in the art. Like reference numerals refer to like elements throughout the figures, and description thereof will be omitted.

[0029] The expression position and direction of words described in the present application are illustrated by taking the drawings as an example, but changes can also be made as needed, and the changes are included in the protection scope of the present application.

[0030] Referring to Figures 1-5 The present application provides a first ratchet disc 1, a second ratchet disc 2, a driven disc 3, at least two locking members 4, a driving disc 5 and a reset member 6. The first ratchet disc 1 and the second ratchet disc 2 are, for example, two annular components of the same model, and the inner sides of the first ratchet disc 1 and the second ratchet disc 2 are provided with teeth, respectively. When assembled, the second ratchet disc 2 and the first ratchet disc 1 are coaxially stacked, and the teeth in the first ratchet disc 1 and the teeth in the second ratchet disc 2 face opposite directions. The teeth on the inner rings of the first ratchet disc 1 and the second ratchet disc 2 are inclined teeth. The first ratchet disc 1 and the second ratchet disc 2 are positionally fixed and cannot rotate.

[0031] The driven disc 3 is rotatably arranged on the inner side of the first ratchet disc 1. In operation, the driven disc 3 rotates, while the positions of the first ratchet disc 1 and the second ratchet disc 2 are fixed. The two locking members 4 are respectively located at different positions in the axial direction of the driven disc 3. The two locking members 4 are respectively connected in the axial direction of the driven disc 3, for example, the distance between the two locking members 4 in the axial direction of the driven disc 3 is 5 cm. The locking members 4 are provided with limiting teeth 41 which are engaged with the teeth of the first ratchet disc 1 and the second ratchet disc 2. The limiting teeth 41 are inclined teeth. One of the locking members 4 is respectively slidably abutted on the inner side of the first ratchet disc 1 through the limiting teeth 41, and the other locking member 4 is slidably abutted on the inner side of the second ratchet disc 2. The driving disc 5 is provided with driving shafts 51, the number of the driving shafts 51 matches the number of the locking members 4, the driving shafts 51 are inserted into the driven disc 3, for driving the driven disc 3 to rotate relative to the first ratchet disc 1 and the second ratchet disc 2, and for driving the limiting teeth 41 of at least one locking member 4 to separate from the first ratchet disc 1 or the second ratchet disc 2. In rotation, the driving disc 5 is driven to rotate by a power source, and the driven disc 3 is driven to rotate in the first ratchet disc 1 or the second ratchet disc 2 by the driving shafts 51 arranged on the driving disc 5.

[0032] The reset member 6 is connected between the locking member 4 and the driven disc 3, and is used to elastically push the locking member 4 to abut against the first ratchet disc 1 or the second ratchet disc 2 to block the reverse rotation of the driven disc 3 relative to the first ratchet disc 1 or the second ratchet disc 2. After the driving disc 5 drives the driven disc 3 to rotate, one of the locking members 4 and one of the ratchet discs are always in the state of separation, and the locking member 4 on the other side is elastically pushed by the reset member 6 to reciprocally abut against the teeth on the inner side of the other ratchet disc. When the power source connected with the driving disc 5 is instantaneously cut off, the resistance generated by the driven structure connected with the driven disc 3 generates a reverse rotation torque, at this time, the limiting teeth 41 on the locking member 4 are elastically pushed by the reset member 6 to abut against the teeth in a certain position, the reverse torque transmitted by the driven disc 3 is blocked and locked, and cannot be transmitted to the driving disc 5 connected with the driven disc 3, so as to avoid the damage of the internal structure of the driving source connected with the driving disc 5. Moreover, the power source connected with the driving disc 5 can lock the position of the driven disc 3 when the power is instantaneously cut off, so as to prevent the reverse movement of the driven structure connected with the other end of the driven disc 3, and cause production accidents.

[0033] In one embodiment, the driven disc 3 is provided with a movable hole 31, the movable hole 31 is a through hole provided on the driven disc 3, the locking member 4 is provided with a driving groove 42, for example, a groove provided on the side wall of the locking member 4, the end of the driving shaft 51 is slidably connected in the driving groove 42 through the movable hole 31, the driving groove 42 includes a first position 421 and a second position 422, when the end of one driving shaft 51 is located in the first position 421 of one locking member 4, the limiting teeth 41 and the first ratchet disc 1 or the second ratchet disc 2 are separated, and the other driving shaft 51 is located in the second position 422 of the corresponding locking member 4.

[0034] When the end of one driving shaft 51 is located in the second position 422 of one locking member 4, the limiting teeth 41 and the first ratchet disc 1 or the second ratchet disc 2 are slidably abutted, and the other driving shaft 51 is located in the first position 421 of the corresponding locking member 4.

[0035] Taking two locking pieces 4 as an example, the two locking pieces 4 are symmetrically distributed, and the limiting teeth 41 on the two locking pieces 4 face opposite directions. When one of the driving shafts 51 is in the first position 421 on the locking piece 4, the limiting teeth 41 on the locking piece 4 and the teeth on the first ratchet disc 1 are separated and no longer abut, and the limiting teeth 41 on the locking piece 4 on the other side and the second ratchet disc 2 always slide and abut, and the driving shaft 51 inside the locking piece 4 on the other side is located at the second position 422 inside the locking piece 4. At this time, the driving disc 5 drives the driven disc 3 to rotate clockwise or counterclockwise through the driving shaft 51. When the power source of the driving disc 5 stops outputting at this time, the reverse torque on the driven disc 3 pushes the driven disc 3 to rotate in the opposite direction, one locking piece 4 at the corresponding position and the first ratchet disc 1 or the second ratchet disc 2 engaged with it are abutted and locked, which can effectively block the reverse torque of the driven disc 3 from being transmitted to the driving disc 5, preventing the power source connected to the driving disc 5 from being damaged.

[0036] In one specific embodiment, the driving surface 43 is, for example, an inclined surface. The driving groove 42 is further provided with a driving surface 43 between the first position 421 and the second position 422. The driving shaft 51 switches between the first position 421 and the second position 422 through the driving surface 43 to drive the locking piece 4 to move along the radial direction of the driven disc 3. The driving surface 43 can make the driving shaft 51 smoothly switch between the first position 421 and the second position 422. The driving surface 43 is a smooth side wall opened in the driving groove 42. When the driving shaft 51 moves from the first position 421 to the second position 422 along the driving surface 43, the side wall of the driving shaft 51 at this time smoothly abuts and presses the driving surface 43, pushing the locking piece 4 to move along the radial direction of the ratchet disc at a uniform speed, preventing the locking piece 4 from being stuck when moving along the radial direction and further causing the locking piece 4 and any ratchet disc to fail to stably cooperate. When the power source of the driving disc 5 is cut off, the locking piece 4 on one side and the ratchet disc at the corresponding position cannot be smoothly engaged and abutted, and the reverse torque is blocked.

[0037] More specifically, the projection length of the driving surface 43 in the moving direction of the locking piece 4 and the tooth height of the limiting tooth 41 are in the ratio of (2-3):1. When the driving shaft 51 moves along the active hole 31 from one end to the other end and at the same time abuts the tooth along the driving surface 43 from the first position 421 to the second position 422, the locking piece 4 is driven to move the limiting tooth 41 on the locking piece 4 away from the tooth inside the ratchet disc, realizing the driving of the driving disc 5 to rotate the driven disc 3 in one direction, completing the unlocking of the locking piece 4 on one side, and the locking piece 4 on the other side always adheres to the inside of the corresponding ratchet disc and reciprocally moves relative to the ratchet disc. Through test verification, the tooth height and the projection length of the driving surface 43 in the moving direction within the above ratio range can more stably and reliably separate the limiting tooth 41 and the tooth inside the corresponding ratchet when the driving shaft 51 switches between the first position 421 and the second position 422.

[0038] In one embodiment, the active hole 31 is a strip-shaped hole, the rod body of the driving shaft 51 is slidingly connected in the strip-shaped hole, and the movable distance of the driving shaft 51 in the strip-shaped hole is greater than or equal to the projection length of the driving surface 43 perpendicular to the moving direction of the locking piece 4. When the driving shaft 51 is driven, the driving shaft 51 will first move relative to the strip-shaped hole from one end to the other end in the strip-shaped hole, and in the moving process, the driving shaft 51 moves from the first position 421 to the second position 422 along the driving surface 43. The projection length of the driving surface 43 in the moving direction of the limiting piece is smaller than the movable distance of the driving shaft 51 in the strip-shaped hole, which will cause the driving shaft 51 to fail to completely switch between the first position 421 and the second position 422, thereby causing the limiting piece to not completely separate from the corresponding ratchet, causing the driving disc 5 to drive the driven disc 3 to rotate in the forward direction to have a larger resistance, and damaging the disc.

[0039] In another embodiment, the driven disc 3 is provided with a sliding groove 8 and a limiting assembly 9 communicating with the strip-shaped hole, and the locking piece 4 further comprises a sliding part connected with the limiting tooth 41, the sliding part is slidingly connected in the sliding groove 8, and the limiting assembly 9 is used to limit the locking piece 4 perpendicular to the moving direction of the locking piece 4. The sliding groove 8 is arranged on the driven disc 3, the cross section of the sliding part and the cross section of the sliding groove 8 are similar in shape, for example, the shape of the sliding part is rectangular, and the limiting assembly 9 always limits the locking piece 4 in the sliding groove 8, so that the locking piece 4 can only make linear motion relative to the sliding groove 8, preventing the locking piece 4 from being unable to smoothly move due to the serious damage of the surface of the sliding connection after long-term use, so that the driving disc 5 cannot be smoothly and timely locked when moving in the forward or reverse direction.

[0040] In one embodiment, the limiting assembly 9 comprises a limiting plate 91 and a bolt 92, the limiting plate 91 is connected to the driven disc 3 by the bolt 92 and abuts against the locking piece 4. The two sides of the limiting plate 91 are screwed to the surface of the driven disc 3 by the bolt 92, and the lower surface of the limiting plate 91 abuts against the upper surface of the locking piece 4, limiting the axial position of the locking piece 4 on the driven disc 3, avoiding the up and down shaking of the locking piece 4 when moving.

[0041] More specifically, the first ratchet disc 1 is further provided with a first connecting groove 10 away from the inner edge of the second ratchet disc 2, and the peripheral side of the driven disc 3 is provided with a second connecting groove 11, and the first connecting groove 10 and the second connecting groove 11 are slidably connected by a connecting strip 12. The inner side of the first ratchet disc 1 is connected by the second ratchet disc 2, and when rotating, the driven disc 3 is always located on the inner side of the first ratchet disc 1 and is slidably connected, so that when rotating, the locking piece 4 is always kept on the inner side of the corresponding ratchet, preventing the locking piece 4 from being on the inner side of the corresponding ratchet when the power source connected by the driving disc 5 is instantaneously cut off, losing the locking effect and damaging the internal mechanism assembly of the power source.

[0042] Although the embodiments of the present application have been shown and described above, it should be understood that the above-mentioned embodiments are exemplary and should not be construed as limiting the present application. Those skilled in the art can make changes, modifications, replacements and variations to the above-mentioned embodiments without departing from the principles and purposes of the present application within the scope of the present application, and all these changes should be within the protection scope of the present application.

Claims

1. A backstop, characterized in that: The utility model relates to a kind of gear shifters, including: First ratchet disc; Second ratchet disc, the second ratchet disc and the first ratchet disc are coaxially stacked, and the teeth in the first ratchet disc and the teeth in the second ratchet disc are opposite;Driven disc, the driven disc is rotatably arranged in the inner side of the first ratchet disc and the second ratchet disc;At least two locking members, two locking members are respectively located at different positions in the axis direction of the driven disc, the locking member is equipped with the limit tooth that is engaged with the tooth type of the first ratchet disc and the second ratchet disc, one locking member is slidably abutted on the tooth in the inner side of the first ratchet disc, and the other locking member is slidably abutted on the tooth in the inner side of the second ratchet disc;Driving disc, the driving disc is equipped with at least two driving shafts, the driving shaft is inserted into the driven disc, for driving the driven disc relative to the first ratchet disc and the second ratchet disc rotation, and the limit tooth of at least one locking member and the first ratchet disc or the second ratchet disc are separated;It further includes reset member, and the reset member is connected between the locking member and the driven disc, for elastically pushing the locking member to abut the first ratchet disc or the second ratchet disc block, to prevent the driven disc relative to the first ratchet disc or the second ratchet disc reverse rotation; The driven disc is equipped with movable hole, both the locking member is equipped with driving slot, and the end of the driving shaft is slidably connected in the driving slot through the movable hole, and the driving slot includes first position and second position, when the end of one driving shaft is located in the first position on one locking member, the limit tooth and the first ratchet disc, or, the second ratchet disc are separated, and the other driving shaft is located in the second position on the corresponding locking member;When the end of one driving shaft is located in the second position on one locking member, the limit tooth and the first ratchet disc, or, the second ratchet disc are slidably abutted, and the other driving shaft is located in the first position on the corresponding locking member; The inner edge of the first ratchet disc away from the second ratchet disc is further equipped with first connecting slot, and the periphery of the driven disc is provided with second connecting slot, and the first connecting slot and the second connecting slot are slidably connected by connecting strip.

2. The check valve of claim 1, wherein The driving surface is further provided between the first position and the second position in the driving slot, and the driving shaft is switched between the first position and the second position through the driving surface, so as to drive the locking member to move along the radial direction of the driven disc.

3. The check valve of claim 2, wherein The projection length of the driving surface in the moving direction of the locking member and the tooth height of the locking member are in the proportion of (2-3) :

1.

4. The check valve of claim 2, wherein The movable hole is a strip-shaped hole, and the rod body of the driving shaft is slidably connected in the strip-shaped hole, and the movable distance of the driving shaft in the strip-shaped hole is greater than or equal to the projection length of the driving surface perpendicular to the moving direction of the locking member.

5. The check valve of claim 4, wherein The driven disc is provided with a sliding groove and a limiting assembly in communication with the strip-shaped hole, and the locking member further includes a sliding part connected with the limit tooth, the sliding part is slidably connected in the sliding groove, and the limiting assembly is used to limit the locking member in the direction perpendicular to the moving direction of the locking member.

6. The check valve of claim 5, wherein The limiting assembly comprises a limiting plate and a bolt, the limiting plate is connected on the driven disc through the bolt and abuts against the locking piece.

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