CN113504808B - A lockable hand-crank mechanism - Google Patents
A lockable hand-crank mechanism Download PDFInfo
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- CN113504808B CN113504808B CN202110952314.1A CN202110952314A CN113504808B CN 113504808 B CN113504808 B CN 113504808B CN 202110952314 A CN202110952314 A CN 202110952314A CN 113504808 B CN113504808 B CN 113504808B
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- groove
- crank mechanism
- movable block
- hand crank
- clamping column
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
- G05G1/00—Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
- G05G1/08—Controlling members for hand actuation by rotary movement, e.g. hand wheels
- G05G1/10—Details, e.g. of discs, knobs, wheels or handles
- G05G1/12—Means for securing the members on rotatable spindles or the like
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Transmission Devices (AREA)
Abstract
一种可锁止的手摇机构，安装在传动板总承上，传动板总承上设置有链轮以及与链轮同轴固定的轴套，轴套内部设置有转轴，轴套远离链轮的端部设置有齿槽；还包括离合驱动组件，轴套通过齿槽与离合驱动组件卡接或脱离，控制着向链轮传递动力的通断。本发明摈弃了传统的动力输出和制动的分离设置的方式，将动力输出和制动集成于一体的结构，使得整体结构集成度高，空间占用小，在使用效果上仅需要控制手摇柄即可实现动力输出和状态的转换，特别适合密集架的升降操作。
A lockable hand-crank mechanism is installed on a transmission plate assembly. A sprocket and a sleeve coaxially fixed with the sprocket are provided on the transmission plate assembly. A rotating shaft is provided inside the sleeve. A tooth groove is provided at the end of the sleeve away from the sprocket. A clutch drive assembly is also included. The sleeve is engaged or disengaged with the clutch drive assembly through the tooth groove to control the on and off of power transmission to the sprocket. The present invention abandons the traditional separate setting of power output and braking, and integrates power output and braking into an integrated structure, so that the overall structure has high integration and small space occupation. In terms of use effect, only the hand crank handle needs to be controlled to realize power output and state conversion, which is particularly suitable for the lifting and lowering operation of compact shelving.
Description
Technical Field
The invention relates to the field of hand-operated mechanisms, in particular to a lockable hand-operated mechanism.
Background
The existing compact shelf bookshelf adopts a traditional chain transmission structure, the traditional chain transmission device is low in relative transmission efficiency and weak in power transmission due to the transmission structure characteristics, the problems of chain disengagement, high transmission noise and chain breakage are easy to occur in operation, normal use of the compact shelf is affected, most importantly, the existing hand-operated mechanism can only realize synchronous movement, input and output are strict, output is generated when input is available, and the state without output cannot be maintained under the condition of accidental power input.
Disclosure of Invention
According to the problems set forth in the background art, the invention provides a multifunctional compact shelf hand-operated mechanism to solve the problems, and the invention is further described below.
The hand-operated locking mechanism is mounted on a transmission plate assembly, a sprocket and a shaft sleeve coaxially fixed with the sprocket are arranged on the transmission plate assembly, a rotating shaft is arranged in the shaft sleeve, a tooth groove is formed in the end portion, far away from the sprocket, of the shaft sleeve, the hand-operated locking mechanism is characterized by further comprising a clutch driving assembly, the clutch driving assembly comprises a fixed plate, a fixing plate and a rocker arm, the fixing plate is fixedly connected to the end portion of the rotating shaft, limiting grooves are formed in the fixing plate, the rocker arm comprises a barrel portion and an arm portion which are connected into a whole, a barrel shaft sleeved on the rotating shaft is arranged in the barrel portion, the barrel portion and the arm portion are arranged on different surfaces and are communicated with each other, a movable block comprises a circular-like portion and a rectangular portion which are connected into a whole, a hole digging groove is formed in the middle of the circular-like portion, a limiting edge is connected to the top of the hole digging groove, the circular-like portion is arranged in the barrel portion, a movable groove is formed in the rectangular portion, movable tongue and lock pieces are movably arranged on two sides of the rectangular portion, the lock pieces are connected with the rotary tongue and synchronously rotate, the movable tongue is contacted with the side walls of the movable groove, and the movable hook is fixedly arranged on the circular-like portions and the circular-like portions are respectively arranged on two sides of the circular hook.
Preferably, the rectangular part of the movable block is attached to the inner wall of the arm part of the rocker arm, the side wall of the arm part guides the movement of the movable block, the movable block is maintained to move in the axial direction of the rocker arm, the movable block is prevented from moving sideways, and further the situation that the limit edge and the limit groove are mechanically impacted is avoided.
Preferably, a gap exists between the rectangular part of the movable block and the inner wall of the arm part of the rocker arm, a guide clamping column is arranged on the quasi-circular part, a sliding groove is arranged on the cylinder part, the guide clamping column is positioned in the sliding groove, the sliding groove guides the guide clamping column, and the matching accuracy of the limit edge and the limit groove is ensured.
Preferably, when the limit edge is matched with the limit groove, the guide clamping column is also matched in the tooth groove of the shaft sleeve, the guide clamping column is contacted with the side surface of the tooth groove, the stress intensity is guaranteed due to the action of the guide clamping column and the tooth groove under the condition of external false touch, and meanwhile, the guide clamping column has the function of correcting the position of the tooth groove, so that the position accuracy of the movable hook and the tooth groove is guaranteed.
Preferably, when the movable block moves, one part of the movable hook and the guide clamping column always contacts with the tooth slot, and one part of the movable hook and the guide clamping column always limits the rotation freedom degree of the shaft sleeve.
Preferably, the guide clamping column is made of brittle materials, and is broken when the guide clamping column is still matched with the tooth grooves to output power, and at the moment, the driving rotating shaft is rotated by external force based on the fact that the limiting edges are matched with the limiting grooves, so that power output cannot be achieved.
Preferably, the lockset is a component with a coded lock structure, and the operation authority of the rocker arm is set to ensure the safety.
The swing arm is characterized by further comprising a tension spring, wherein one end of the tension spring is connected to the movable block, the other end of the tension spring is connected to the inner wall of the swing arm, tension force is always applied to the movable block by the tension spring, and the situation that the locking state is mistakenly changed into the power state is avoided by the tension force of the tension spring.
Preferably, the rocker arm is also pivoted with a handle.
Preferably, the open face of the barrel of the rocker arm is sealed by a closure cap attached thereto.
Compared with the hand-operated structure in the prior art, the invention discards the traditional mode of separating power output and braking, integrates the power output and the braking into a whole structure, has high integration level of the whole structure and small space occupation, can realize the conversion of the power output and the state only by controlling the hand crank on the use effect, and is particularly suitable for the lifting operation of the compact shelf.
Drawings
FIG. 1 is an exploded view of the present invention and assembly;
FIG. 2 is a schematic view of the structure of the rocker arm and the movable block;
FIG. 3 is a schematic diagram of the clutch drive assembly;
FIG. 4 is an isometric view of a power state;
FIG. 4a is another schematic isometric view of a power state;
FIG. 5 is a schematic axial view of the self-locking state;
FIG. 5a is another schematic axial view of the self-locking state;
In the figure, a sealing cover 1, a handle 2, a lock 3, an outer hexagonal screw 4, a fixed plate 5, a limit groove 51, a rocker arm 6, a cylinder part 61, an arm part 62, a cylinder shaft 63, a chute 64, a movable block 7, a round-like part 71, a rectangular part 72, a hole digging groove 73, a movable groove 74, a limit edge 75, a guide clamping column 76, a tension spring 8, a half-round head screw 9, a rotating tongue 10, a bearing 11, a movable hook 12, a countersunk head bolt 13, a rotating shaft 14, a shaft sleeve 15, a tooth socket 151, a chain wheel 16 and a transmission plate assembly 17.
Detailed Description
A specific embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
A lockable hand crank mechanism is arranged on a transmission plate assembly 17, a chain wheel 16 and a shaft sleeve 15 coaxially fixed with the chain wheel are arranged on the transmission plate assembly 17, a rotating shaft 14 is arranged in the shaft sleeve 15, a bearing is sleeved at the end part of the rotating shaft 14 far away from the chain wheel, a tooth slot 151 is arranged at the end part of the shaft sleeve 15 far away from the chain wheel 16 and sleeved on the bearing, and the shaft sleeve 15 is clamped with or separated from a clutch driving assembly through the tooth slot 151 to control the on-off of power transmission to the chain wheel 16.
The clutch driving assembly comprises a lock 3, an outer hexagonal screw 4, a fixing plate 5, a rocker arm 6, a movable block 7, a rotating tongue 10, a bearing 11, a movable hook 12 and a countersunk bolt 13, wherein the rocker arm 6 comprises a cylinder part 61 and an arm part 62 which are connected into a whole, a raised cylinder shaft 63 is arranged in the cylinder part 61, the cylinder shaft 63 is sleeved on a rotating shaft 14, the end part of the rotating shaft 14 is used for fastening the fixing plate 5 and the rotating shaft 14 in a surface contact manner through the cooperation with the outer hexagonal screw 4, the cylinder part 61 and the arm part 62 of the rocker arm 6 are arranged to be open on different surfaces and are communicated with each other in the inside so as to be convenient for installing the movable block 7, the movable block 7 comprises a circular part 71 and a rectangular part 72 which are connected into a whole, the circular part 71 is arranged in the middle, the circular part is positioned in the groove 73, the circular part 71 is positioned in the cylinder part 61, the rectangular part 72 is positioned in the arm part 62, the rectangular part 72 is provided with a movable groove 74, the lock 3 and the rotating tongue 10 is connected and movably arranged on two sides of the rectangular part 72 through the cooperation with the outer hexagonal screw 4, the side wall of the circular part 7 is synchronously connected with the circular part 71, and the circular part 71 is fixedly connected with the circular part 71 through the circular part 71, and the circular part 71 is respectively, and the circular part is fixedly connected with the circular part 71 through the circular part 71 and the groove 75, and the circular part 13 side-shaped groove 13 side-limiting groove and the circular part is simultaneously, and the circular part is fixedly connected with the circular part and the position-shaped part and the position-limiting part and the 13.
The clutch driving assembly controls the on-off of power transmitted to the sprocket 16 through the clamping connection or disconnection of the movable hook 12 and the tooth groove 151, namely, the hand crank mechanism has two mutually convertible states, namely, one is a power state, referring to fig. 4 and 4a, the limit edge 75 is disconnected from the limit groove 51, the movable hook 12 is matched with the tooth groove 151, the rocker arm 6 and the sprocket 16 form a power transmission path based on the matched state of the movable hook 12 and the tooth groove 151 at the moment, the rocker arm 6 transmits torque to the sprocket 16, and the other is a locking state, referring to fig. 5 and 5a, the limit edge 75 is matched with the limit groove 51, the movable hook 12 is disconnected from the tooth groove 151, the rocker arm 6 and the sprocket 16 cannot form a power transmission path at the moment, and the rocker arm 6 cannot transmit torque to the sprocket 16.
The two states of the invention can be switched by rotating the lock 3, namely, the lock 3 is rotated clockwise from a locking state to a power state, the lock 3 drives the cam-shaped turning tongue 10 to synchronously rotate, the turning tongue 10 pushes the movable block 7 to move upwards when rotating, at the moment, the limit edge 75 of the movable block 7 is separated from the limit groove 51 of the fixed plate 5, and when the lock 3 rotates in place, the movable hook 12 moves upwards and is clamped into the tooth groove 151 to be matched with the tooth groove 151, namely, the lock enters the power state, and the lock 3 is switched from the power state to the locking state to reversely rotate.
In one embodiment, the rectangular portion 72 of the movable block 7 is attached to the inner wall of the arm portion 62 of the rocker arm 6, and the side wall of the arm portion 62 has a guiding effect on the movement of the movable block 7, so that the movable block 7 is maintained to move in the axial direction of the rocker arm 6, the movable block 7 is prevented from laterally moving, and further, the situation that the limit edge 75 and the limit groove 51 mechanically collide is avoided. However, in this embodiment, the rectangular portion 72 is attached to the inner wall of the arm portion 62, which is strictly required to the external environment, and is prone to cause a blocking phenomenon, and based on this, in this embodiment, as a preferred embodiment, there is a gap between the rectangular portion 72 of the movable block 7 and the inner wall of the arm portion 62 of the rocker arm 6, the round-like portion 71 of the movable block 7 is further provided with a guiding clip column 76, the cylindrical portion 61 of the rocker arm 6 is provided with a sliding slot 64, the guiding clip column 76 is located in the sliding slot 64, the sliding slot 64 has a guiding effect on the guiding clip column 76, and the matching accuracy of the limiting edge 75 and the limiting slot 51 is ensured.
Further, in the locked state, the limit edge 75 is matched with the limit groove 51, and the limit edge 75 and the fixing plate 5 are limited based on space layout and cost, when the rocker arm 6 receives an external misoperation, the strength of the rocker arm is insufficient to maintain that the rocker arm is not deformed, so that in the embodiment, when the limit edge 75 is matched with the limit groove 51, the guide clamping column 76 is also matched in the tooth groove 151 of the shaft sleeve 15, the guide clamping column 76 is contacted with the side surface of the tooth groove 151, and under the condition of external misoperation, the guide clamping column 76 and the tooth groove 151 act to ensure the stress strength.
It should be further specifically noted that, the sleeve 15 has a rotational degree of freedom, when the locked state is converted into the power state, the movable hook 12 moves upward to have a risk of being unable to be clamped into the tooth groove 151, whereas, in view of the fact that the guide clamping post 76 is fitted into the tooth groove 151 of the sleeve 15 before, that is, the guide clamping post 76 has a position correcting effect on the tooth groove 151, it is ensured that the positions of the movable hook 12 and the tooth groove 151 are opposite, and optimally, the size settings of the movable hook 12 and the guide clamping post 76 in this embodiment satisfy that when the movable block 7 moves, one of the components of the movable hook 12 and the guide clamping post 76 always contacts with the tooth groove 151, that is, when the state is converted, the movable hook 12 and the guide clamping post 76 always have a limitation of one component to the rotational degree of freedom of the sleeve 15.
The problem that needs to be solved is, in the locking state, in order to guarantee that the limit edge 75 does not receive external interference when joining in marriage with spacing groove 51, set up the side contact of direction card post 76 and tooth groove 151, if at this moment rotate the rocking arm under the condition of not converting into power state, the direction card post 76 will also rotate through the cooperation pivot cover 15 with tooth groove 151, and then realize power take off, in order to avoid this condition to take place, this embodiment adopts the brittle material preparation with direction card post 76, when the mistake realizes power take off in the locking state, because power take off load is big, collapse the direction card post 76 of brittle material preparation, be in the cooperation state based on limit edge 75 and spacing groove 51 this moment, external force will drive the pivot and rotate, can't realize power take off.
In this embodiment, in order to ensure the safety of the device, the operation authority of the rocker arm 6 is set, the lock 3 is a component with a coded lock structure, and the lock with the coded lock function is a conventional prior art, which is not further described in this embodiment.
In the rotation process of the rocker arm 6, randomness exists in the stopping position of the rocker arm 6, namely, the movable block 7 is displaced under the dead weight under the action of no external force, so that the mechanism is erroneously brought into a power state from a locking state, in order to avoid the situation, the embodiment is further provided with the tension spring 8, one end of the tension spring 8 is connected to the semicircular head screw 9 positioned on the movable block 7, the other end of the tension spring 8 is connected to the inner wall of the rocker arm 6, tension force is always generated on the movable block 7 by the tension spring 8, namely, unless the movable block 7 is manually connected with the rotary lock 3, the tension force of the tension spring 8 avoids the situation that the locking state is erroneously brought into the power state.
In order to raise the operational feeling, the present embodiment further includes a handle 2 pivotally connected to the swing arm 6.
The open face of the cylindrical portion 61 of the rocker arm 6 of the present embodiment is sealed by the attachment of the cover 1.
To maintain the stability of the contact of the rotary tongue 10 with the side wall of the movable groove 74, a contact lever is provided on the rotary tongue 10, and the contact lever is raised to ensure that the rotary tongue is always in contact with the side wall of the movable groove 74.
The invention has high integration level, can realize the conversion of power and locking state only by controlling the hand crank, and is particularly suitable for the lifting operation of the compact shelf.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The lockable hand crank mechanism is arranged on a transmission plate assembly (17), a chain wheel (16) and a shaft sleeve (15) coaxially fixed with the chain wheel are arranged on the transmission plate assembly (17), a rotating shaft (14) is arranged in the shaft sleeve (15), a tooth groove (151) is formed in the end part, far away from the chain wheel (16), of the shaft sleeve (15), and the locking hand crank mechanism is characterized by further comprising a clutch driving assembly, wherein the clutch driving assembly comprises:
The fixed plate (5) is fixedly connected to the end part of the rotating shaft (14), and a limit groove (51) is formed in the fixed plate;
the rocker arm (6) comprises a cylinder part (61) and an arm part (62) which are connected into a whole, a cylinder shaft (63) sleeved on the rotating shaft (14) is arranged inside the cylinder part (61), the cylinder part (61) and the arm part (62) are arranged as open surfaces on different surfaces and are communicated with each other inside,
The movable block (7) comprises a similar round part (71) and a rectangular part (72) which are connected integrally, wherein a hole digging groove (73) is formed in the middle of the similar round part (71), a limiting edge (75) is connected to the top of the hole digging groove (73), the limiting edge (75) can be matched with the limiting groove (51), the cylinder shaft (63) is positioned in the hole digging groove (73), the similar round part (71) is positioned in the cylinder part (61), the rectangular part (72) is positioned in the arm part (62), and a movable groove (74) is formed in the rectangular part (72);
The lock (3) and the rotating tongue (10) are movably arranged at two sides of the rectangular part (72), the lock (3) is connected with the rotating tongue (10) and synchronously rotates, and the rotating tongue (10) is contacted with the side wall of the movable groove (74);
The movable hook (12) is fixed on the quasi-circular part (71), and meanwhile, the movable hook (12) and the quasi-circular part (71) are respectively positioned at two sides of the quasi-circular part (71).
2. The hand crank mechanism of claim 1, wherein:
The rectangular part (72) of the movable block (7) is attached to the inner wall of the arm part (62) of the rocker arm (6), the side wall of the arm part (62) guides the movement of the movable block (7), the movable block (7) is maintained to move in the axial direction of the rocker arm (6), the movable block (7) is prevented from laterally moving, and further the situation that the limit edge (75) and the limit groove (51) are mechanically impacted is avoided.
3. The hand crank mechanism of claim 1, wherein:
A gap exists between the rectangular part (72) of the movable block (7) and the inner wall of the arm part (62) of the rocker arm (6);
The round-like part (71) is provided with a guide clamping column (76), the cylinder part (61) is provided with a sliding groove (64), the guide clamping column (76) is positioned in the sliding groove (64), and the sliding groove (64) guides the guide clamping column (76).
4. A hand crank mechanism according to claim 3, wherein:
When the limit edge (75) is matched with the limit groove (51), the guide clamping column (76) is also matched in the tooth groove (151) of the shaft sleeve (15), and the guide clamping column (76) is contacted with the side surface of the tooth groove (151).
5. The hand crank mechanism of claim 4, wherein:
when the movable block (7) moves, one of the movable hook (12) and the guide clamping column (76) is always in contact with the tooth groove (151).
6. The hand crank mechanism of claim 5, wherein:
The guide clamping column (76) is made of brittle materials;
when the guide clamping column (76) is still matched with the tooth groove (151) to output power, the guide clamping column (76) is broken.
7. The hand crank mechanism of claim 1, wherein:
The lockset (3) is a part with a coded lock structure.
8. The hand crank mechanism of any one of claims 1-7, wherein:
The device also comprises a tension spring (8), one end of the tension spring (8) is connected to the movable block (7), the other end of the tension spring is connected to the inner wall of the rocker arm (6), and the tension spring (8) always pulls the movable block (7).
9. The hand crank mechanism of claim 8, wherein:
The rocker arm (6) is also pivoted with a handle (2).
10. The hand crank mechanism of claim 9, wherein:
The open surface of the barrel (61) of the rocker arm (6) is sealed by a cover (1) connected thereto.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110952314.1A CN113504808B (en) | 2021-08-19 | 2021-08-19 | A lockable hand-crank mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110952314.1A CN113504808B (en) | 2021-08-19 | 2021-08-19 | A lockable hand-crank mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113504808A CN113504808A (en) | 2021-10-15 |
| CN113504808B true CN113504808B (en) | 2025-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110952314.1A Active CN113504808B (en) | 2021-08-19 | 2021-08-19 | A lockable hand-crank mechanism |
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| CN (1) | CN113504808B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN215813889U (en) * | 2021-08-19 | 2022-02-11 | 江西金虎保险设备集团有限公司 | Hand-operated mechanism capable of locking |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6371891B1 (en) * | 1998-12-09 | 2002-04-16 | Danny E. Speas | Adjustable pedal drive mechanism |
| AU2005258202A1 (en) * | 2004-06-22 | 2006-01-05 | Wabtec Holding Corporation | Mechanical release of release holding mechanism for hand brake |
| JP4815836B2 (en) * | 2005-03-30 | 2011-11-16 | マツダ株式会社 | Car movable floor equipment |
| CN212257322U (en) * | 2020-07-26 | 2020-12-29 | 德力西电气有限公司 | Switching-on/off handle mechanism and plug-in circuit breaker |
-
2021
- 2021-08-19 CN CN202110952314.1A patent/CN113504808B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN215813889U (en) * | 2021-08-19 | 2022-02-11 | 江西金虎保险设备集团有限公司 | Hand-operated mechanism capable of locking |
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| CN113504808A (en) | 2021-10-15 |
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