A multifunctional hand-cranked mechanism for compact racks

Abstract

A multifunctional hand-cranked mechanism for a compact shelving system includes a hand crank as a power source; a power assembly having a power channel inside, a guide groove provided at the front section of the channel, connected to a sprocket on the assembly, and transmitting power to the sprocket; a rear axle sleeve fixed on the assembly, having a guide groove provided at the front section, a rotating cavity in the rear section, and a limit end face; a clutch assembly, one end of which is connected to the hand crank, and the other end is a mating end mating with the guide groove of the power assembly or the rear axle sleeve, and the mating end slides in the power channel of the power assembly under the push of the hand crank; there are two mutually convertible states of power and self-locking. The present invention has a high degree of integration, and only needs to control the hand crank to realize power output and state conversion, which is particularly suitable for the lifting operation of compact shelving.

Description

Technical Field

[0001] The invention relates to the field of hand-cranked mechanisms, and in particular to a multifunctional hand-cranked mechanism for a compact rack. Background Art

[0002] The hand-cranked mechanism of the existing compact shelving bookshelves has always adopted the traditional chain transmission structure. The transmission structure characteristics of this traditional chain transmission device determine its relatively low transmission efficiency and weak power transmission. In addition, it is easy for the chain to come off during operation, the transmission noise is loud, and the chain is prone to jumping and breaking, which affects the normal use of the compact shelving. Most importantly, the current hand-cranked mechanism can only achieve synchronous movement, and the input and output are strictly corresponding. When there is input, there is output. It is impossible to maintain a no-output state in the event of unexpected power input. Summary of the invention

[0003] According to the problems raised in the background technology, the present invention provides a multifunctional hand-cranked mechanism for compact shelving to solve the problems. The present invention will be further described below.

[0004] A multifunctional hand-cranked mechanism for a compact rack includes a hand crank as a power source; a power assembly having a power channel inside, a guide groove provided at the front section of the channel, connected to a sprocket on an assembly, and transmitting power to the sprocket; a rear shaft sleeve fixed on the assembly, having a guide groove provided at the front section, a rotating cavity in the rear section, and a limit end face; a clutch assembly, one end of which is connected to the hand crank, and the other end is a mating end mating with the guide groove of the power assembly or the rear shaft sleeve, and the mating end slides in the power channel of the power assembly under the push of the hand crank;

[0005] There are two mutually convertible states: power and self-locking; when the power is converted to the self-locking state, the hand crank is pushed, the mating end of the clutch assembly disengages from the guide groove of the power assembly, slides toward the rear sleeve in the power channel, and stops in the rotating cavity of the rear sleeve; when the self-locking state is converted to the power state, the hand crank is pushed in again, the clutch assembly disengages from the stop state and enters the guide groove of the rear sleeve, and the clutch assembly is pulled to slide until the mating end engages in the guide groove of the power assembly.

[0006] Preferably, the rear bushing is pressed onto the assembly by a connecting plate.

[0007] Preferably, the power assembly comprises an outer sleeve, wherein the rear section of the outer sleeve is provided with a first bearing (3-1) and the front section is provided with a second bearing (3-2); the front sections of the rear sleeve and the front sleeve are sequentially connected and set in the axial holes of the first bearing (3-1) and the second bearing (3-2), and the front and rear sleeves are both provided with guide grooves distributed in a circumferential manner; the front sleeve and the outer sleeve are fixedly connected to form a power swivel, and the sprocket is fixed to the rear section of the outer side of the outer sleeve.

[0008] Preferably, the clutch assembly includes a drive shaft, a rear end outer circumference is distributed with V-shaped wedge strips, the rear end face is a V-shaped movable block, which is connected to the rear end of the drive shaft and has rotational freedom, an outer circumference is distributed with inclined wedge strips, and the front end face of the wedge strip is an inclined surface; the drive shaft is located in the guide groove of the rear bushing and the front bushing, the movable block and the end of the drive shaft connected thereto form a mating end, and the mating end can move in the power channel.

[0009] Preferably, the movable block is connected to the driving shaft via a semicircular head screw, and the movable block is sleeved on the semicircular head screw; a built-in spring is provided on the semicircular head screw to facilitate the resetting of the movable block.

[0010] Preferably, the middle section of the drive shaft is provided with an external spring and a hook fixing member, the external spring is fixedly connected between the second bearing (3-2) and the hook fixing member, and the hand crank is fixedly connected to the front section of the drive shaft.

[0011] Preferably, a limiting circular boss is arranged outside the middle section of the outer sleeve; the first bearing (3-1) is fixed on the outer sleeve via a retaining spring, while the second bearing (3-2) is fixed on the outer sleeve via the limiting circular boss.

[0012] Preferably, the outer sleeve is fixedly connected to the front sleeve by means of a stop screw provided on the boss.

[0013] Preferably, it also includes a guide assembly, which is coaxially arranged with the power assembly and located at the rear side of the hand crank, including: a rear guide plate, which is fixed to the front section of the outer side of the outer sleeve, and a guide sleeve is arranged on the upper circumference of the rear guide plate; a front guide plate, which is fixed to the rear section of the hook fixing member; a guide shaft, which is arranged corresponding to the guide sleeve, and the front end face is fixed to the front guide plate.

[0014] Preferably, a baffle is connected to the rear end surface of the guide shaft, and the baffle prevents the guide shaft from being dislocated when the guide shaft moves in the guide sleeve.

[0015] Beneficial effects: Compared with the prior art, the present invention has a high degree of integration, and only requires controlling the hand crank to achieve power output and state conversion, which is particularly suitable for the lifting operation of compact shelving. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 : Exploded schematic diagram of the present invention and assembly;

[0017] Figure 2 : Schematic diagram of the structural explosion of the present invention;

[0018] Figure 3 : Schematic diagram of power state;

[0019] Figure 4 : Schematic diagram of self-locking state;

[0020] Figure 5: Schematic diagram of the connection between the power assembly and the rear shaft sleeve;

[0021] In the figure: connecting plate 1, rear bushing 2, first bearing 3-1, second bearing 3-2, sprocket 4, stop screw 5, outer bushing 6, semicircular head screw 7, internal spring 8, movable block 9, drive shaft 10, front bushing 11, external spring 12, hook fixing part 13, external hexagonal screw 14, rear guide plate 15, front guide plate 16, guide shaft 17, baffle 18, hand crank 19, assembly 20. DETAILED DESCRIPTION

[0022] Next, combine with Figure 1-5 A specific embodiment of the present invention is described in detail.

[0023] A multifunctional hand-cranked mechanism for a compact shelving system includes a connecting plate 1, a rear bushing 2, a bearing 3, a sprocket 4, a stop screw 5, an outer bushing 6, a semicircular head screw 7, an internal spring 8, a movable block 9, a drive shaft 10, a front bushing 11, an external spring 12, a hook fixing part 13, an external hexagonal screw 14, a rear guide plate 15, a front guide plate 16, a guide shaft 17, a baffle 18, a hand crank 19, and an assembly 20.

[0024] The connecting plate 1 has screw holes distributed in a circle, and a screw through hole is set at the corresponding position on the front upper section of the assembly 20, which is fixed to the rear side of the assembly 20 by an external hexagonal screw 14, and the rear section of the rear shaft sleeve 2 is fixed in the shaft hole set in the connecting plate 1.

[0025] A first bearing (3-1) and a second bearing (3-2) are arranged in the outer sleeve 6. The first bearing (3-1) is fixed by a limiting inner retaining spring and is located at the rear section of the outer sleeve 6. The second bearing (3-2) is fixed by a front limiting cone of the outer sleeve 6 and is located at the front section of the outer sleeve 6. The front section of the rear sleeve 2 and the front section of the front sleeve 11 are connected and set in the shaft holes of the first bearing (3-1) and the second bearing (3-2) in sequence. Guide grooves distributed in a circumference are arranged in the front and rear sleeves.

[0026] A limiting circular boss is arranged outside the middle section of the outer sleeve 6, and the outer sleeve 6 is fixedly connected to the front sleeve 11 by means of a stop screw 5 arranged on the boss. The sprocket 4 is fixed to the outer rear section of the outer sleeve 6, the rear guide plate 15 is fixed to the outer front section of the outer sleeve 6, and the front guide plate 16 is fixed to the rear section of the hook fixing member 13.

[0027] The rear guide plate 15 is circumferentially provided with a guide sleeve, and the front guide plate 16 and the guide sleeve of the rear guide plate 15 are circumferentially distributed with guide shafts 17 at corresponding positions. The front end face of the guide shaft 17 is fixed on the front guide plate 16, and the rear end face of the guide shaft 17 is connected to the baffle 18 through the semicircular head screw 7. When the guide shaft 17 moves in the guide sleeve, the baffle 18 prevents the guide shaft 17 from being dislocated.

[0028] The rear end of the drive shaft 10 and the movable block 9 are connected by a common semicircular head screw 7. The semicircular head screw 7 is provided with a built-in spring 8, which is located in the groove of the movable block 9 to facilitate the resetting of the movable block 9. At this time, the movable block 9 is sleeved on the semicircular head screw 7 and is radially limited by the semicircular head screw 7, but the movable block 9 still has rotational freedom relative to the drive shaft 10. The outer side of the rear end of the drive shaft 10 is a circumferentially distributed V-shaped wedge strip, and the rear end face is V-shaped. The outer side of the movable block 9 is a circumferentially distributed inclined wedge strip, and the front end face of the wedge strip is an inclined surface.

[0029] The drive shaft 10 is located in the guide grooves of the rear shaft sleeve 2 and the front shaft sleeve 11. The drive shaft 10 can move in the guide grooves through the wedge-shaped bar. An external spring 12 and a hook fixing member 13 are provided in the middle section of the drive shaft 10. The external spring 12 is fixedly connected between the bearing (3-2) and the hook fixing member 13. The hand crank 19 is fixed to the front section of the drive shaft 10.

[0030] When the hand crank 19 is pushed backward, the drive shaft 10 is driven to move in the guide grooves provided by the front sleeve 11 and the rear sleeve 2. When it reaches the rear section of the rear sleeve 2, the drive shaft 10 squeezes the movable block 9. When the movable block 9 is pushed above the guide groove of the rear sleeve 2, that is, the movable block 9 is separated from the guide groove of the rear sleeve 2, the drive shaft 10 continues to squeeze the movable block 9. Since the rear end face of the drive shaft 10 is a V-shaped surface, the front end face of the inclined wedge strip is an inclined surface, and the V-shaped wedge strip is pressed against the movable block 9. When the inclined wedge strip is squeezed upward, the movable block 9 is pushed to rotate, so that the inclined wedge strip slides until it contacts the limit end surface 21 of the rear shaft sleeve 2, that is, at this time, the movable block 9 is located above the guide groove, and the V-shaped wedge strip at the rear end of the drive shaft 10 moves into the rear shaft sleeve 2, and the guide shaft 17 provided on the front guide plate 16 moves backward in the guide sleeve of the rear guide plate 15; at this time, the external spring 12 is compressed, the drive shaft 10 is disengaged from the front guide groove in the front shaft sleeve 11, and the hand crank 19 returns to the attached Figure 4 The hand-crank mechanism is in the self-locking state shown in the figure, and the power output of the assembly 20 is stopped.

[0031] When the hand crank 19 is pushed backward again, the V-shaped wedge strip at the rear end of the drive shaft 10 squeezes the inclined wedge strip of the movable block 9 at the limit end face 21, pushing the inclined wedge strip of the movable block 9 to rotate again, so that the inclined wedge strip of the movable block 9 enters the guide groove of the rear shaft sleeve 2; at this time, the movable block 9 will return to the guide groove of the rear shaft sleeve 2 under the reset push of the built-in spring 8, and under the action of the external spring 12, the V-shaped wedge strip at the rear end of the drive shaft 10 moves to the front section of the guide groove in the front shaft sleeve 11, that is, the drive shaft 10 disengages from the guide groove in the rear shaft sleeve 2 and cooperates with the guide groove in the front section of the guide groove in the front shaft sleeve 11 for power transmission, and the guide shaft 17 moves forward in the guide sleeve of the rear guide plate 15, and the hand crank 19 is reset to the attached Figure 4 The power state shown is that the hand-crank mechanism is released from the self-locking state.

[0032] The hand crank 19 is fixedly connected to the hook fixing member 13 and the drive shaft 10. The V-shaped wedge strip of the drive shaft 10 is in the front section of the guide groove in the front sleeve 11. The front section of the front sleeve 11 is connected to the second bearing in the outer sleeve 6. The rear section of the front sleeve 11 is fixedly connected to the outer sleeve 6. The rear guide plate 15 is fixed to the front section of the outer sleeve 6. One end of the guide shaft 17 is fixed to the front guide plate 16, and the other end is connected to the guide sleeve of the rear guide plate 15. The sprocket 4 is fixed to the rear section of the outer sleeve 6. When the hand crank 19 is turned, the sprocket 4 is driven to rotate synchronously, driving the hand crank mechanism to operate, and achieving the purpose of power output of the assembly 20.

[0033] The present invention has a high degree of integration and can realize power output and state conversion by only controlling a hand crank, and is particularly suitable for the lifting operation of a compact shelving.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multifunctional hand-cranked mechanism for compact racks, characterized in that include: A hand crank (19) as a power source; A power assembly is provided with a power channel inside, and a guide groove is provided at the front section of the channel, which is connected to the sprocket (4) on the assembly to transmit power to the sprocket (4); The rear shaft sleeve (2) is fixed on the assembly, the front section of which is provided with a guide groove, the rear section of which is a rotating cavity, and the end surface of which is a limit end surface; A clutch assembly, one end of which is connected to a hand crank (19), and the other end of which is a mating end mating with a guide groove of a power assembly or a rear shaft sleeve (2), and the mating end slides in a power channel of the power assembly under the push of the hand crank (19); There are two mutually convertible states: power and self-locking; The power is converted to the self-locking state, and the hand crank (19) is pushed, so that the mating end of the clutch assembly is disengaged from the guide groove of the power assembly, and slides toward the rear shaft sleeve (2) in the power channel, and stops in the rotation cavity of the rear shaft sleeve (2); The self-locking state is switched to the power state, and the hand crank (19) is pushed in again, so that the clutch assembly leaves the stop state and enters the guide groove of the rear shaft sleeve (2), and the clutch assembly is pulled to slide until the mating end is mated in the guide groove of the power assembly.

2. The hand-crank mechanism according to claim 1, characterized in that: The rear shaft sleeve (2) is pressed onto the assembly (20) by the connecting plate (1).

3. The hand-crank mechanism according to claim 1, characterized in that: The power assembly comprises an outer shaft sleeve (6), wherein the rear section of the outer shaft sleeve (6) is provided with a first bearing (3-1) and the front section is provided with a second bearing (3-2); The front sections of the rear shaft sleeve (2) and the front shaft sleeve (11) are sequentially connected and set in the shaft holes of the first bearing (3-1) and the second bearing (3-2), and the front and rear shaft sleeves are both provided with guide grooves distributed in a circumferential manner; The front shaft sleeve (11) and the outer shaft sleeve (6) are fixedly connected to form a power rotating body, and the sprocket wheel (4) is fixed to the outer rear section of the outer shaft sleeve (6).

4. The hand-crank mechanism according to claim 3, characterized in that: The clutch assembly comprises: The drive shaft (10) has V-shaped wedge strips distributed around the outer circumference of the rear end, and the rear end surface is V-shaped. The movable block (9) is connected to the rear end of the driving shaft (10) and has a rotational freedom, and has inclined wedge-shaped strips distributed on the outer circumference, and the front end surface of the wedge-shaped strip is an inclined surface; The drive shaft (10) is located in the guide grooves of the rear shaft sleeve (2) and the front shaft sleeve (11), and the movable block (9) and the end of the drive shaft (10) connected thereto form a matching end, which can move in the power channel.

5. The hand-crank mechanism according to claim 4, characterized in that: The movable block (9) is connected to the driving shaft (10) via a semicircular head screw (7), and the movable block (9) is sleeved on the semicircular head screw (7); A built-in spring (8) is arranged on the semicircular head screw (7).

6. The hand-crank mechanism according to claim 5, characterized in that: An external spring (12) and a hook fixing member (13) are provided in the middle section of the driving shaft (10); The spring (12) is fixedly connected between the second bearing (3-2) and the hook fixing member (13), and the hand crank (19) is fixedly connected to the front section of the driving shaft (10).

7. The hand-crank mechanism according to claim 6, characterized in that: A limiting circular boss is arranged outside the middle section of the outer shaft sleeve (6); The first bearing (3-1) is fixed on the outer shaft sleeve (6) through a retaining spring, while the second bearing (3-2) is fixed on the outer shaft sleeve (6) through a limiting circular boss. A stop screw (5) is arranged on the boss to fix the outer shaft sleeve (6) and the front shaft sleeve (11) in connection.

8. The hand-crank mechanism according to claim 7, characterized in that: The device also includes a guide assembly, which is coaxially arranged with the power assembly and is located at the rear side of the hand crank (19), and includes: A rear guide plate (15) is fixed to the front section of the outer side of the outer sleeve (6), and a guide sleeve is provided on its upper circumference; A front guide plate (16) fixed to the rear section of the hook fixing member (13); The guide shaft (17) is arranged corresponding to the guide sleeve, and the front end surface is fixed on the front guide plate (16).

9. The hand-crank mechanism according to claim 8, characterized in that: The rear end surface of the guide shaft (17) is connected with a blocking piece (18).

10. The hand-crank mechanism according to claim 9, characterized in that: The power is converted to a self-locking state, and the hand crank (19) is pushed backward, driving the drive shaft (10) to move in the guide grooves provided in the front shaft sleeve (11) and the rear shaft sleeve (2). When the drive shaft (10) reaches the rear section of the rear shaft sleeve (2), the movable block (9) is pressed. When the movable block (9) is pushed to the upper part of the guide groove of the rear shaft sleeve (2), the movable block (9) is separated from the guide groove of the rear shaft sleeve (2); at this time, the drive shaft (10) continues to press the movable block (9). Since the rear end surface of the drive shaft (10) is a V-shaped surface, the front end surface of the inclined wedge strip is an inclined surface. When the V-shaped wedge strip presses the inclined wedge strip upward, the movable block (9) is pushed to rotate, so that the inclined wedge strip slides until it contacts the limit end surface of the rear shaft sleeve (2). At this time, the movable block (9) is located above the guide groove, and the V-shaped wedge strip at the rear end of the drive shaft (10) moves into the rear shaft sleeve (2). The guide shaft (17) provided by the front guide plate (16) moves backward in the guide sleeve of the rear guide plate (15). At this time, the external spring (12) is compressed, and the drive shaft (10) is disengaged from the front guide groove in the front shaft sleeve (11). At this time, the hand-cranked mechanism is in a self-locking state; When the self-locking state is switched to the power state, the hand crank (19) is pushed backward again, and the V-shaped wedge strip at the rear end of the drive shaft (10) squeezes the inclined wedge strip of the movable block (9) at the limit end surface, pushing the inclined wedge strip of the movable block (9) to rotate again, so that the inclined wedge strip of the movable block (9) enters the guide groove of the rear shaft sleeve (2); at this time, the movable block (9) returns to the guide groove of the rear shaft sleeve (2) under the reset pushing action of the built-in spring (8), and under the action of the external spring (12), the V-shaped wedge strip at the rear end of the drive shaft (10) moves to the front section of the guide groove in the front shaft sleeve (11), that is, the drive shaft (10) is separated from the guide groove in the rear shaft sleeve (2) and cooperates with the guide groove in the front section of the guide groove in the front shaft sleeve (11) to transmit power, and the guide shaft (17) moves forward in the guide sleeve of the rear guide plate (15), and the hand crank mechanism is released from the self-locking state.

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