CN213017543U

CN213017543U - Lifting transmission device

Info

Publication number: CN213017543U
Application number: CN202021893841.7U
Authority: CN
Inventors: 汪颂力; 项乐宏; 袁朋朋
Original assignee: Loctek Inc
Current assignee: Loctek Ergonomic Technology Co Ltd; Loctek Inc
Priority date: 2020-09-02
Filing date: 2020-09-02
Publication date: 2021-04-20
Anticipated expiration: 2030-09-02

Abstract

The utility model belongs to the field of lifting devices and discloses a lifting transmission device, which comprises a fixed shell, a transmission mechanism, a brake mechanism and a driving mechanism, wherein the transmission mechanism comprises a gear assembly and two moving assemblies which are respectively meshed with the two sides of the gear assembly, the gear assembly comprises a driving wheel with a groove arranged on the side surface, and the two moving assemblies are respectively connected with the two sides of the fixed shell in a sliding way; the braking mechanism comprises a first rotating block and a second rotating block which are rotatably connected to the fixed shell, a push rod is arranged on the end face, facing the second rotating block, of the first rotating block, one end of the second rotating block is matched with the ratchet of the groove, when the braking mechanism is used, when one end of the second rotating block abuts against the ratchet of the groove, the driving wheel is limited to rotate in a single direction, and when one end of the second rotating block is separated from the ratchet of the groove, the driving wheel recovers to rotate; the driving mechanism is connected with the driving wheel. The utility model discloses adjust keyboard layer board and lift mesa's relative position convenient and fast.

Description

Lifting transmission device

Technical Field

The utility model belongs to the elevating gear field especially relates to a lifting transmission device.

Background

The elevating platform has been widely used in people's life, and is provided with the keyboard layer board on the elevating platform usually, and at present, the keyboard layer board is connected on the elevating platform through the joint mode usually, and this needs frequent change joint position when leading to adjusting the distance of keyboard layer board and elevating platform mesa, and it is comparatively troublesome to use.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a lifting transmission device to overcome the comparatively troublesome problem of adjustment keyboard layer board and the relative position of lift mesa that exists among the prior art.

In order to achieve the above purpose, the basic scheme of the utility model is as follows: a lifting transmission device comprises a fixed shell, a transmission mechanism, a brake mechanism and a driving mechanism, wherein the transmission mechanism comprises a gear assembly and two moving assemblies which are respectively meshed with two sides of the gear assembly and move in opposite directions in the using process;

the gear assembly is arranged on the fixed shell and comprises a driving wheel, the side surface of the driving wheel is provided with a groove with a ratchet, and the two moving assemblies are respectively connected to the two sides of the fixed shell in a sliding manner;

the braking mechanism comprises a first rotating block and a second rotating block which are rotatably connected to the fixed shell, a push rod which penetrates through the fixed shell and is used for pushing the second rotating block to rotate is arranged on the end face, facing the second rotating block, of the first rotating block, the second rotating block is located in the groove of the driving wheel, one end of the second rotating block is matched with the ratchet of the groove, when one end of the second rotating block is abutted against the ratchet of the groove in the using process, the driving wheel is limited to rotate in a single direction, and when one end of the second rotating block is separated from the ratchet of the groove, the driving wheel restores to rotate;

the driving mechanism is connected with the driving wheel.

The working principle of the scheme is as follows: the lifting transmission device is arranged between the lifting platform plate and the keyboard supporting plate, and in the initial position, the two moving assemblies are located at the same height. Before using, install two removal subassemblies respectively on elevating platform platen and keyboard layer board, at first start actuating mechanism, actuating mechanism drive action wheel rotates, and the action wheel drives the gear subassembly and rotates, and the gear subassembly drives two removal subassemblies rather than meshing and moves towards opposite direction, then the distance between elevating platform platen and the keyboard layer board increases, and when the distance between elevating platform platen and the keyboard layer board increased to suitable position, the stall action wheel. And when the second rotating block rotates to one end to be abutted against the ratchet on the groove in the driving wheel, the driving wheel is limited to rotate in a single direction, the distance between the bedplate of the lifting table and the keyboard supporting plate cannot be reduced, and the user can use the lifting table at the moment. After the use, the first rotatory piece of reverse rotation, the push rod drives the rotatory piece reverse rotation of second, and the rotatory piece of second breaks away from the contact back to its tip and ratchet, and the rotatory piece of second no longer carries on spacingly to the action wheel this moment, and the action wheel can the free rotation, and the reverse rotation action wheel, gear assembly drive removal subassembly reset, and then the distance between elevating platform platen and the keyboard layer board is got back to initial size.

The beneficial effect of this scheme: this device is when changing the distance between elevating platform platen and the keyboard layer board, only need to pass through the rotatory action wheel of actuating mechanism, just adjustable two removal subassembly relative movement, because remove the subassembly and install on elevating platform platen and keyboard layer board, consequently, just can adjust the distance between elevating platform platen and the keyboard layer board through the rotation, after adjusting the distance between elevating platform platen and the keyboard layer board, only need rotatory piece of rotatory second just to realize the location of keyboard layer board, realize that the keyboard layer board can only rise and can not descend promptly, and convenient for operation, compare prior art and need frequently adjust the change joint position, this device convenient to use and save time.

Further, the gear assembly includes a drive wheel.

Furthermore, the gear assembly comprises a driving wheel and two driven wheels respectively meshed with two sides of the driving wheel. The driven wheels are arranged on two sides of the driving wheel and are suitable for changing the distance between the two moving assemblies, and the size of the device can be adjusted.

Further, the moving assembly comprises moving shells and racks which are fixedly connected with each other, the two moving shells are respectively connected to two sides of the fixed shell in a sliding mode, and the two racks are respectively meshed to two sides of the driving wheel.

Furthermore, the moving assembly comprises a moving shell and racks which are fixedly connected, the two moving shells are respectively connected to two sides of the fixed shell in a sliding mode, and the two racks are respectively meshed with different driven wheels.

Further, the rotatory piece of second is the pawl, and the middle part and the fixed casing of pawl rotate to be connected, the shape of recess is the ratchet shape, and the one end of pawl and the ratchet cooperation of ratchet shape recess, the breach that holds the push rod bottom is seted up to the other end, and the one end that the breach is close to the pawl middle part is its first end, and the one end that the pawl middle part was kept away from to the breach is its second end, and at the rotatory in-process of push rod, the push rod rotates to the first end of breach and when offsetting with the breach, and the pawl offsets with the ratchet and makes the action wheel restricted unidirectional rotation, and the push rod rotates to breach second end and when offsetting with the breach, and the pawl breaks away from the ratchet.

Furthermore, a limit groove for the push rod to penetrate is formed in the fixed shell, in the rotating process of the push rod, the pawl is abutted to the ratchet teeth to enable the driving wheel to be limited and rotated, the push rod is clamped at one end of the limit groove, the pawl is separated from the ratchet teeth to enable the driving wheel to recover to rotate, and the push rod is located at the other end of the limit groove.

Further, the first rotating block is located outside the shell, the cross section of the first rotating block is circular, and a protrusion facilitating rotation is arranged on the side face of the first rotating block. The protrusion facilitates the second rotation of the rotation.

Further, the driving mechanism is an electric motor or a manual knob, and a rotating rod which penetrates through the second rotating block and drives the driving wheel to rotate is arranged on the bottom surface of the manual knob. The manual knob drives the driving wheel to rotate through the rotating rod, and the installation is convenient.

Furthermore, the end of the rotating rod is a clamping block with a polygonal cross section, and a clamping groove matched with the clamping block is formed in the end face of the driving wheel. The driving wheel is driven by the manual knob through the polygonal shape, the structure is simple, and material saving is facilitated.

Drawings

Fig. 1 is an exploded view of a lifting transmission device of the present invention;

fig. 2 is a schematic structural view of the lifting transmission device in a use state of the present invention;

fig. 3 is a cross-sectional view of the push rod at the first end of the lifting transmission device in use;

fig. 4 is a cross-sectional view of the push rod at the second end of the lifting transmission device of the present invention in use;

fig. 5 is a schematic structural view of the pawl and the driving wheel of the lifting transmission device of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a fixed shell 1, a driving wheel 2, a groove 21, a ratchet 211, a clamping groove 22, a driven wheel 3, a rack 4, a movable shell 5, a sliding groove 6, a convex strip 7, a first rotating block 8, a push rod 81, a second rotating block 9, a notch 91, a first end 911, a second end 912, a manual knob 10, a rotating rod 11, a clamping block 111 and a limiting groove 12.

The embodiment is substantially as shown in fig. 1 to 3: a lifting transmission device comprises a fixed shell 1, a transmission mechanism, a brake mechanism and a driving mechanism, wherein the transmission mechanism comprises a gear assembly and two moving assemblies which are respectively meshed with two sides of the gear assembly and move in opposite directions in the using process.

The gear assembly is arranged in the fixed shell 1 and comprises a driving wheel 2 or a plurality of driven wheels 3, in the implementation, the gear assembly comprises the driving wheel 2 and the two driven wheels 3 respectively meshed with the two sides of the driving wheel 2, and the two sides of the fixed shell 1 are provided with openings for the outer parts of the driven wheels 3 to pass through; the movable assembly comprises two racks 4 and two movable shells 5 which are respectively connected onto the racks 4 through screws, the movable shells 5 are located outside the fixed shells 1, convex strips 7 are machined on the inner surfaces, close to the fixed shells 1, of the movable shells 5, the two racks 4 and the two movable shells 3 penetrate through the open parts of the fixed shells 1, sliding grooves 6 matched with the convex strips 7 are machined on the outer surfaces of the two sides of the fixed shells 1, and the sliding connection of the fixed shells 1 and the movable shells 5 is achieved through the matching of the sliding grooves 6 and the convex strips 7. The driving wheel 2 is rotatably connected with the fixed shell 1, and a ratchet-shaped groove 21 is formed in one side surface of the driving wheel 2.

The braking mechanism comprises a first rotating block 8 and a second rotating block 9, the first rotating block 8 is positioned on the outer side of the fixed shell 1, the second rotating block 9 is positioned on the inner side of the fixed shell 1, two push rods 81 penetrating through the fixed shell 1 are arranged on the end face, facing the second rotating block 9, of the first rotating block 8, and two limiting grooves 12 for the two push rods 81 to penetrate through are formed in the fixed shell 1; the second rotary block 9 is a pawl, the pawl is located the recess 21 of the driving wheel 2 and the ratchet 211 cooperation of its one end and recess 21, breach 91 has been seted up to the other end of pawl, breach 91 is used for holding the bottom of one of them push rod 81, the middle part of pawl has the arch of running through fixed casing 1, the rotation that has realized pawl and fixed casing 1 through the arch is connected, the one end that breach 91 is close to the pawl middle part is its first end 911, the one end that the middle part of the pawl was kept away from to breach 91 is its second end 912, at the rotatory in-process of push rod 81, push rod 81 is rotatory to the first end 911 of breach 91 and when offseting with breach 91, the pawl offsets with ratchet 211 and makes driving wheel 2 restricted unidirectional rotation, push rod 81 is rotatory to breach 91 second end and 912 and when offseting with breach 91, break away from pawl 211 and make driving. In the rotating process of the push rod 81, when the pawl abuts against the ratchet 211 to limit the rotation of the driving wheel 2, the push rod 81 is clamped at one end of the limiting groove 12, and when the pawl is separated from the ratchet 211 to enable the driving wheel 2 to recover to rotate, the push rod 81 is located at the other end of the limiting groove 12. The cross section of the first rotating block 8 is circular, and the side surface of the first rotating block 8 is provided with a protrusion for facilitating rotation.

Actuating mechanism can be for the motor or for manual knob 10, actuating mechanism selects to be manual knob 10 in this embodiment, the outside of first rotatory piece 8 is located to manual knob 10, and have the rotary rod 11 that runs through first rotatory piece 8 and fixed casing 1, the bottom block of rotary rod 11 is on action wheel 2, the bottom of rotary rod 11 is the polygonal block 111 of block for the cross section, have the draw-in groove 22 of cooperation block 111 on the terminal surface of action wheel 2, manual knob 10, first rotatory piece 8 and the coaxial rotation of action wheel 2.

The specific implementation process is as follows: before use, the lifting transmission device needs to be installed between a lifting table and a keyboard supporting plate, two movable shells 5 are respectively and fixedly installed on a lifting table platform plate and the keyboard supporting plate, namely, one movable shell 5 moving upwards from an initial position is fixedly installed on the bottom surface of the lifting table platform plate, and the other movable shell 5 moving downwards from the initial position is fixedly installed on the keyboard supporting plate. In the initial position, the two movable housings 5 are at the same height, the pawls and the ratchet-shaped grooves 21 on the driving wheel 2 are in a non-fit state, i.e., the driving wheel 2 can rotate freely, and one of the push rods 81 of the first rotating block 8 is located at one end of the limiting groove 12.

During use, by rotating the manual knob 10, the two moving housings 5 will move in opposite directions simultaneously. When using, at first rotatory manual knob 10, because the block 111 of the block of the rotary rod 11 bottom and the draw-in groove 22 block of action wheel 2, make the rotation of manual knob 10 drive action wheel 2 synchronous revolution, action wheel 2 rotates and drives rather than the driven round of 3 rotations of meshing, because rack 4 and mobile housing 5 can only slide relatively fixed casing 1, consequently follow the spout 6 that rack 4 and mobile housing 5 were driven to drive along fixed casing 1 from driving wheel 3 and reciprocate, wherein, two mobile housing 5 remove along opposite direction simultaneously, make the distance increase between elevating platform platen and the keyboard layer board.

When the distance between the lifting platform plate and the keyboard supporting plate is increased to a proper position, the first rotating block 8 is rotated, the push rod 81 on the first rotating block 8 rotates in the limiting groove 12 on the fixed shell 1, the push rod 81 is made to rotate to the other end from one end of the limiting groove 12, meanwhile, the bottom end of the push rod 81 moves in the notch 91 of the pawl, the push rod 81 pushes the pawl to rotate, when the bottom end of the push rod 81 rotates to abut against the first end 911 of the notch 91, the pawl synchronously rotates to the position where one end of the pawl abuts against the ratchet 211 of the ratchet groove 21, at the moment, the driving wheel 2 is limited to rotate in a single direction, and the distance between the lifting platform plate and the keyboard supporting plate can only ascend and can not descend.

After the use, the first rotating block 8 is rotated reversely, the push rod 81 on the first rotating block 8 moves reversely in the notch 91 of the pawl until the bottom end of the push rod 81 abuts against the second end 912 of the notch 91, the push rod 81 drives the pawl to rotate synchronously and reversely, the pawl rotates synchronously until the end of the pawl is separated from the ratchet 211, and the driving wheel 2 is not limited to rotate at this time. And finally, the driving wheel 2 is rotated reversely, the driving wheel 2 drives the racks 4 meshed with the driving wheel to move oppositely, the two movable shells 5 synchronously move oppositely, and the distance between the bedplate of the lifting platform and the keyboard supporting plate is recovered to the initial size.

The above description is only an example of the present invention, and general knowledge such as specific technical solutions known in the art is not described herein too much. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. The utility model provides a lifting transmission device, includes fixed casing, drive mechanism, arrestment mechanism and actuating mechanism, drive mechanism includes gear assembly and two respectively with the gear assembly both sides meshing and carry out the removal subassembly that opposite direction removed in the use, its characterized in that:

the driving mechanism is connected with the driving wheel.

2. A lifting drive as claimed in claim 1, wherein: the gear assembly includes a drive wheel.

3. A lifting drive as claimed in claim 1, wherein: the gear assembly comprises a driving wheel and two driven wheels respectively meshed with the two sides of the driving wheel.

4. A lifting drive as claimed in claim 2, wherein: the moving assembly comprises moving shells and racks which are fixedly connected with each other, the two moving shells are respectively connected to two sides of the fixed shell in a sliding mode, and the two racks are respectively meshed to two sides of the driving wheel.

5. A lifting drive as claimed in claim 3, wherein: the movable assembly comprises a movable shell and racks which are fixedly connected, the two movable shells are respectively connected to two sides of the fixed shell in a sliding mode, and the two racks are respectively meshed with different driven wheels.

6. A lifting drive as claimed in claim 1, wherein: the second rotating block is a pawl, the middle of the pawl is rotatably connected with the fixed shell, the shape of the groove is a ratchet shape, one end of the pawl is matched with the ratchet of the ratchet-shaped groove, the other end of the pawl is provided with a notch for accommodating the bottom end of the push rod, one end of the notch close to the middle of the pawl is a first end of the notch, one end of the notch far away from the middle of the pawl is a second end of the notch, in the rotating process of the push rod, when the push rod rotates to the first end of the notch and offsets with the notch, the pawl offsets with the ratchet to enable the driving wheel to be limited to rotate in one way, when the push rod rotates to the second end of the notch and offsets.

7. A lifting drive as claimed in claim 1, wherein: the fixed shell is provided with a limit groove for the push rod to pass through, in the rotating process of the push rod, the pawl is abutted to the ratchet teeth to enable the driving wheel to be limited and rotated, the push rod is clamped at one end of the limit groove, and when the pawl is separated from the ratchet teeth to enable the driving wheel to recover to rotate, the push rod is located at the other end of the limit groove.

8. A lifting drive as claimed in claim 1, wherein: the first rotating block is located outside the shell, the cross section of the first rotating block is circular, and a protrusion facilitating rotation is arranged on the side face of the first rotating block.

9. A lifting drive as claimed in claim 1, wherein: the driving mechanism is an electric motor or a manual knob, and the bottom surface of the manual knob is provided with a rotating rod which penetrates through the second rotating block and drives the driving wheel to rotate.

10. A lifting drive as claimed in claim 9, wherein: the end of the rotating rod is a clamping block with a polygonal cross section, and a clamping groove matched with the clamping block is formed in the end face of the driving wheel.