CN215813889U

CN215813889U - Hand-operated mechanism capable of locking

Info

Publication number: CN215813889U
Application number: CN202121947284.7U
Authority: CN
Inventors: 张文渟
Original assignee: Jiangxi Jinhu Insurance Equipment Group Co Ltd
Current assignee: Jiangxi Jinhu Insurance Equipment Group Co Ltd
Priority date: 2021-08-19
Filing date: 2021-08-19
Publication date: 2022-02-11
Anticipated expiration: 2031-08-19

Abstract

A lockable hand-operated mechanism is arranged on a transmission plate assembly, the transmission plate assembly is provided with a chain wheel and a shaft sleeve coaxially fixed with the chain wheel, a rotating shaft is arranged in the shaft sleeve, and the end part of the shaft sleeve, far away from the chain wheel, is provided with a tooth groove; the shaft sleeve is clamped or separated from the clutch driving assembly through a tooth groove, and the on-off of power transmitted to the chain wheel is controlled. The utility model abandons 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 in the use effect, and is particularly suitable for the lifting operation of the compact shelf.

Description

Hand-operated mechanism capable of locking

Technical Field

The utility model relates to the field of hand-operated mechanisms, in particular to a lockable hand-operated mechanism.

Background

The lower hand-cranking mechanism of the existing compact shelf bookshelf always adopts the traditional chain transmission structure, and the traditional chain transmission device has low relative transmission efficiency and weak power transmission due to the transmission structure characteristic; in addition, chain dropping is easy to occur during operation, the transmission noise is high, the problems of chain jumping and chain breakage are easy to occur, and the normal use of the compact shelf is influenced; most importantly, the conventional hand-operated mechanism can only realize synchronous movement, the input and the output are strictly opposite, the output is generated when the input exists, and the non-output state cannot be maintained under the condition of suffering from unexpected power input.

Disclosure of Invention

The utility model provides a hand-operated mechanism of a multifunctional compact shelf to solve the problems in the prior art, and the utility model is further explained in the following.

A lockable hand-operated mechanism is arranged on a transmission plate assembly, the transmission plate assembly is provided with a chain wheel and a shaft sleeve coaxially fixed with the chain wheel, a rotating shaft is arranged in the shaft sleeve, and the end part of the shaft sleeve, far away from the chain wheel, is provided with a tooth groove; it is characterized by also comprising a clutch driving component, wherein the clutch driving component comprises: the fixing plate is fixedly connected to the end part of the rotating shaft, and a limiting groove is formed in the fixing plate; the rocker arm comprises a cylinder part and an arm part which are connected into a whole, a cylinder shaft sleeved on the rotating shaft is arranged in the cylinder part, the cylinder part and the arm part are arranged into open surfaces on different surfaces and are communicated with each other, the movable block comprises a round-like part and a rectangular part which are connected into a whole, a hole digging groove is arranged in the middle of the round-like part, the top of the hole digging groove is connected with a limiting edge, and the limiting edge can be matched with the limiting groove; the cylinder shaft is positioned in the hole digging groove, the round-like part is positioned in the cylinder part, the rectangular part is positioned in the arm part, and the rectangular part is provided with a movable groove; the lock and the rotating tongue are movably arranged on two sides of the rectangular part, the lock is connected with the rotating tongue and synchronously rotates, and the rotating tongue is contacted with the side wall of the movable groove; the movable hook is fixed on the similar-circle part, and the movable hook and the similar-circle part are respectively positioned on two sides of the similar-circle part.

Preferably, the rectangular part of the movable block is attached to the inner wall of the arm part of the rocker arm, and the side wall of the arm part guides the movement of the movable block; the movable block is maintained to move in the axis direction of the rocker arm, so that the movable block is prevented from moving laterally, and the situation that the limiting edge is mechanically impacted with the limiting groove 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; the quasi-circle part is provided with a guide clamping column, the cylinder part is provided with a sliding groove, the guide clamping column is positioned in the sliding groove, and the sliding groove guides the guide clamping column; the matching accuracy of the limiting edge and the limiting groove is ensured.

Preferably, when the limiting edge is matched with the limiting groove, the guide clamping column is also matched in the tooth groove of the shaft sleeve, and the guide clamping column is contacted with the side surface of the tooth groove; under the condition of external false touch, the stress intensity is ensured by the action of the guide clamping column and the tooth socket; meanwhile, the guide clamping column has a position correcting effect on the tooth socket, and the position accuracy of the movable hook and the tooth socket is guaranteed.

Preferably, when the movable block moves, one of the movable hook and the guide clamping column is always in contact with the tooth socket; the movable hook and the guide clamping column always have a part to limit the rotation freedom degree of the shaft sleeve.

Preferably, the guide clamping column is made of a brittle material, and is broken when power output is performed under the condition that the guide clamping column is matched with the tooth socket; at the moment, the limiting edge and the limiting groove are in a matched state, the rotating shaft is driven to rotate by external force, and power output cannot be realized.

Preferably, the lock is a component with a coded lock structure, and the operation authority of the rocker arm is set to ensure safety.

Preferably, the device also comprises a tension spring, 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 rocker arm, and the tension spring always has tension on the movable block; the tension of the tension spring avoids the situation that the locking state is mistakenly switched into the power state.

Preferably, the rocker arm is also pivoted with a handle.

Preferably, the open surface of the barrel portion of the rocker arm is sealed by attaching a cap.

Has the advantages that: compared with the hand-operated structure in the prior art, the hand-operated structure abandons the traditional mode of separating the power output and the braking, integrates the power output and the braking into a whole, has high integration level of the whole structure and small occupied space, can realize the conversion of the power output and the state only by controlling the hand crank in the use effect, and is particularly suitable for the lifting operation of the compact shelf.

Drawings

FIG. 1: an exploded view of the present invention and assembly;

FIG. 2: the schematic structural diagram of the rocker arm and the movable block;

FIG. 3: the structure schematic diagram of the clutch driving assembly;

FIG. 4: an axial schematic of a power state;

FIG. 4 a: another schematic isometric view of a power state;

FIG. 5: an axial schematic view of a self-locking state;

FIG. 5 a: another schematic axial view of a self-locking state;

in the figure: the lock comprises a sealing cover 1, a handle 2, a lock 3, an outer hexagonal screw rod 4, a fixing plate 5, a limiting groove 51, a rocker arm 6, a cylinder part 61, an arm part 62, a cylinder shaft 63, a sliding groove 64, a movable block 7, a round-like part 71, a rectangular part 72, a hole digging groove 73, a movable groove 74, a limiting edge 75, a guide clamping column 76, a tension spring 8, a half-round screw rod 9, a rotary tongue 10, a bearing 11, a movable hook 12, a countersunk head bolt 13, a rotating shaft 14, a shaft sleeve 15, a tooth groove 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 with reference to the accompanying drawings.

A lockable hand-operated mechanism is arranged on a transmission plate assembly 17, the transmission plate assembly 17 is provided with a chain wheel 16 and a shaft sleeve 15 coaxially fixed with the chain wheel, a rotating shaft 10 is arranged inside the shaft sleeve 15, the end part of the rotating shaft 10 far away from the chain wheel is sleeved with a bearing, and the end part of the shaft sleeve 15 far away from the chain wheel 16 is provided with a tooth socket 151 and is sleeved on the bearing; the shaft sleeve 15 is clamped or separated with the clutch driving assembly through the tooth grooves 151, and the on-off of the power transmitted to the chain wheel 16 is controlled.

The clutch driving assembly comprises a lockset 3, an outer hexagonal screw rod 4, a fixed 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; 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 the rotating shaft 10, the end part of the rotating shaft 10 is matched with the outer hexagonal screw rod 4 to tightly contact the fixed plate 5 with the cylinder shaft 10, the cylinder part 61 and the arm part 62 of the rocker arm 6 are arranged into open surfaces on different surfaces and communicated with each other, and the movable block 7 is convenient to mount; the movable block 7 comprises a round-like part 71 and a rectangular part 72 which are connected into a whole, a hole digging groove 73 is formed in the middle of the round-like part 71, the cylinder shaft 63 is located in the hole digging groove 73 when the cylinder shaft is installed, the round-like part 71 is located in the cylinder part 61, the rectangular part 72 is located in the arm part 62, a movable groove 74 is formed in the rectangular part 72, the lock 3 and the rotating tongue 10 are connected and movably arranged on two sides of the rectangular part 72, the lock 3 and the rotating tongue 10 synchronously rotate, and the rotating tongue 10 is in contact with the side wall of the movable groove 74; the top of the hole digging groove 73 is connected with a limiting edge 75, the fixing plate 5 is provided with a limiting groove 51, and the limiting edge 75 can be matched with the limiting groove 51; the circle-like part 71 and the cylinder part 61 are provided with mounting grooves, the mounting grooves are fixedly connected with the movable hooks 12 on the circle-like part 71 through countersunk bolts 13, and the movable hooks 12 and the circle-like part 71 are respectively positioned at two sides of the circle-like part 71.

The clutch driving component controls the on-off of the power transmitted to the chain wheel 16 through the clamping connection or the separation of the movable hook 12 and the tooth groove 151, namely, the hand-operated mechanism of the utility model has two mutually convertible states: one is a power state, referring to fig. 4 and 4a, the limit edge 75 is disengaged from the limit groove 51, the movable hook 12 is engaged with the tooth groove 151, at this time, based on the engagement state of the movable hook 12 and the tooth groove 151, the rocker arm 6 and the sprocket 16 form a power transmission path, and the rocker arm 6 transmits torque to the sprocket 16; in the other locking state, referring to fig. 5 and 5a, the limiting edge 75 is engaged with the limiting groove 51, the movable hook 12 is disengaged from the tooth groove 151, and at this time, the swing arm 6 and the sprocket 16 cannot form a power transmission path, and the swing arm 6 cannot transmit torque to the sprocket 16.

The two states of the utility model can be switched by rotating the lock 3: the locking state is switched to a power state, the lockset 3 is rotated clockwise, the lockset 3 drives the cam-shaped rotating tongue 10 to rotate synchronously, the rotating tongue 10 pushes the movable block 7 to move upwards when rotating, the limiting edge 75 of the movable block 7 is separated from the limiting groove 51 of the fixed plate 5 at the moment, and when the lockset 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, so that the power state is achieved; the lock 3 is reversely rotated after the power state is converted into the locking state.

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 moving laterally, and the limit edge 75 is prevented from mechanically colliding with the limit groove 51. However, in this embodiment, the rectangular portion 72 is attached to the inner wall of the arm portion 62, which is a strict requirement for the external environment, and is likely to cause a jamming phenomenon, based on this situation, this embodiment is a preferred embodiment, a gap exists 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 circular-like portion 71 of the movable block 7 is further provided with the guide clamping column 76, the cylinder portion 61 of the rocker arm 6 is provided with the sliding groove 64, the guide clamping column 76 is located in the sliding groove 64, and the sliding groove 64 has a guiding function on the guide clamping column 76, so as to ensure the matching accuracy of the limiting edge 75 and the limiting groove 51.

Further, in the locked state, the limiting edge 75 is engaged with the limiting groove 51, and the limiting edge 75 and the fixing plate 5 are not strong enough to maintain the rocker arm 6 not to deform due to the spatial layout and cost limitation when the rocker arm 6 is subjected to an external misoperation, therefore, in the present embodiment, when the limiting edge 75 is engaged with the limiting groove 51, the guiding catch 76 is also engaged in the tooth groove 151 of the shaft sleeve 15, the guiding catch 76 is in contact with the side surface of the tooth groove 151, and in the case of an external accidental touch, the guiding catch 76 and the tooth groove 151 act to ensure the stress intensity.

It should be noted that, the shaft sleeve 15 has a rotational degree of freedom, when the locked state is converted into the power state, the movable hook 12 moves upward, and there is a risk that the movable hook 12 cannot be locked into the tooth groove 151, whereas in view of the fact that the guiding catch 76 is fitted into the tooth groove 151 of the shaft sleeve 15 before, that is, the guiding catch 76 has a position correcting function on the tooth groove 151, it is ensured that the movable hook 12 and the tooth groove 151 are opposite in position, and optimally, the movable hook 12 and the guiding catch 76 of the present embodiment are dimensioned such that when the movable block 7 moves, one of the movable hook 12 and the guiding catch 76 always contacts with the tooth groove 151, that is, when the state is converted, one of the movable hook 12 and the guiding catch 76 always has a limitation on the rotational degree of freedom of the shaft sleeve 15.

The problem that needs to solve is, under the locking state, in order to guarantee that external interference is not received when spacing limit 75 and spacing groove 51 cooperate, with the side contact setting of direction calorie post 76 and tooth's socket 151, if at this moment rotate the rocking arm under the circumstances that does not convert power state into, direction calorie post 76 also will rotate through the cooperation pivot cover 15 with tooth's socket 151, and then realize power take off, in order to avoid this condition to take place, this embodiment adopts fragile material preparation with direction calorie post 76, when the mistake realizes power take off under the locking state, because power take off load is big, break away direction calorie post 76 that the fragile material was prepared, be in the fit state based on spacing limit 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 security of the device, the operation authority of the rocker arm 6 is set, the lock 3 is a component with a combination lock structure, and the lock with the combination lock function is a conventional prior art, which is not further described in this embodiment.

At the rotation in-process of rocking arm 6, there is the randomness in its position that stops, also be the movable block 7 under the effect of no external force, it will take place the displacement under the dead weight, make the mechanism will get into the power state by the locking state mistake, take place for avoiding this condition, this embodiment still is provided with extension spring 8, the one end of extension spring 8 is connected on being located the half-round head screw rod 9 on the movable block 7, the other end is connected on the inner wall of rocking arm 6, extension spring 8 has the pulling force to movable block 7 all the time, also be unless the artificial access of rotatory tool to lock 3, the condition that the locking state mistake was gone into the power state has been avoided to the pulling force of extension spring 8 takes place.

In order to improve the operation feeling, the handle 2 is pivoted to the swing arm 6.

The open surface of the cylindrical portion 61 of the rocker arm 6 of the present embodiment is sealed by the cap 1 being attached.

In order to maintain the stability of the contact between the rotating tongue 10 and the side wall of the movable groove 74, a contact rod is arranged on the rotating tongue 10, and the contact state with the side wall of the movable groove 74 is ensured by the raised contact rod.

The utility model has high integration level, can realize the conversion between power and locking states only by controlling the hand crank, and is particularly suitable for the lifting operation of the compact shelf.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A lockable hand-operated mechanism is arranged on a transmission plate assembly (17), the transmission plate assembly (17) is provided with a chain wheel (16) and a shaft sleeve (15) coaxially fixed with the chain wheel, a rotating shaft (14) is arranged inside the shaft sleeve (15), and the end part of the shaft sleeve (15) far away from the chain wheel (16) is provided with a tooth groove (151); it is characterized by also comprising a clutch driving component, wherein the clutch driving component comprises:

the fixing plate (5) is fixedly connected to the end part of the rotating shaft (14), and a limiting groove (51) is arranged on the fixing plate;

a rocker arm (6) including a cylinder (61) and an arm (62) connected integrally, wherein a cylinder shaft (63) fitted around the rotating shaft (14) is provided in the cylinder (61), the cylinder (61) and the arm (62) are provided with open surfaces on different surfaces and are communicated with each other,

the movable block (7) comprises a round-like part (71) and a rectangular part (72) which are connected into a whole, a hole digging groove (73) is formed in the middle of the round-like part (71), the top of the hole digging groove (73) is connected with a limiting edge (75), and 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 round-like part (71) is positioned in the cylinder part (61), the rectangular part (72) is positioned in the arm part (62), and the rectangular part (72) is provided with a movable groove (74);

the lock (3) and the rotating tongue (10) are movably arranged on 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 circle-like part (71), and the movable hook (12) and the circle-like part (71) are respectively positioned at two sides of the circle-like part (71).

2. A hand-operated mechanism according to 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), and 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), so that the movable block (7) is prevented from moving laterally, and the situation that the limiting edge (75) is mechanically impacted with the limiting groove (51) is avoided.

3. A hand-operated mechanism according to claim 1, wherein:

a gap is formed 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 quasi-circle 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-operated mechanism according to claim 3, wherein:

when the limiting edge (75) is matched with the limiting 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. A hand-operated mechanism according to 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. A hand-operated mechanism according to claim 5, wherein:

the guide clamping column (76) is made of a brittle material;

when the power output is performed while the guide pin (76) is still engaged with the tooth groove (151), the guide pin (76) is broken.

7. A hand-operated mechanism according to claim 1, wherein:

the lock (3) is a component with a coded lock structure.

8. A hand-operated mechanism according to any one of claims 1 to 7, wherein:

still include extension spring (8), the one end of extension spring (8) is connected and is located movable block (7), and the other end is connected on the inner wall of rocking arm (6), and extension spring (8) have pulling force to movable block (7) all the time.

9. A hand-operated mechanism according to claim 8, wherein:

the rocker arm (6) is also pivoted with a handle (2).

10. A hand-operated mechanism according to claim 9, wherein:

the open surface of the cylinder part (61) of the rocker arm (6) is sealed by connecting a sealing cover (1).