WO2023088332A1

WO2023088332A1 - Transmission assembly for furniture power transmission, and lifting table

Info

Publication number: WO2023088332A1
Application number: PCT/CN2022/132398
Authority: WO
Inventors: 阮正富; 虞红潮; 王科亭; 俞鹏飞; 王肖明
Original assignee: 永艺家具股份有限公司
Priority date: 2021-11-18
Filing date: 2022-11-17
Publication date: 2023-05-25
Also published as: CN217243130U

Abstract

A transmission assembly for furniture power transmission, and a lifting table. The transmission assembly comprises a sleeve (3) and two connecting rods (4), wherein the two connecting rods (4) are located on two opposite sides of the sleeve (3) in a length direction of the sleeve (3); the sleeve (3) is internally provided with a connecting channel (8) extending in the length direction thereof; a connector (9), which can be inserted into the connecting channel (8), is provided on a rod head of the end of each connecting rod (4) close to the sleeve (3), and when the connector (9) is inserted into the connecting channel (8), the connecting rod (4) can slide in the length direction of the sleeve (3); a plurality of first teeth (10) are densely distributed on an inner wall of the connecting channel (8) in a circumferential direction, and a plurality of second teeth (11) are densely distributed on the connector (9) in a circumferential direction thereof; and when the connector (9) is inserted into the connecting channel (8), the first teeth (10) are engaged with the second teeth (11), such that the connecting rod (4) and the sleeve (3) are kept relatively fixed in the circumferential direction. Even if the connector (9) is not aligned with a hole position of the connecting channel (8), it is only necessary to perform a rotation by an angle formed between two adjacent first teeth (10) so as to realize insertion, such that the rotation angle required by the connecting rods (4) is very small.

Description

Transmission components and lift tables for furniture power transmission

technical field

The invention relates to the field of furniture, in particular to a transmission assembly for power transmission of furniture and a lifting table.

Background technique

An adjustable desk is a height-adjustable desk that can be adjusted according to a person's height, sitting posture, and standing posture. For example, the lift tables in the prior art generally include electric lift tables and manual lift tables. The electric lift table uses a motor to drive the lift table up and down, and the manual lift table uses a handle to drive; the structure of the lift table generally includes a table board, a base, a driving mechanism and Liftable table legs are connected to the beams of the table legs, and the table board is installed on the top of the beams; each table leg is provided with a screw lifting mechanism, and the screw lifting mechanism includes a rotating connection in the inner tube of the table leg A lead screw, one end of the lead screw is coaxially connected to a drive gear assembly, a base is threaded on the lead screw, the base is fixedly connected to the inner wall of the inner tube of the table leg, and the outer tube of the table leg is connected to the bottom of the beam or the base connection; there is also a transmission assembly between the two table legs to keep the two table legs up and down synchronously. The driving mechanism is connected to the transmission assembly. Action, that is, the transmission assembly rotates the drive gear assembly of the lead screw lifting mechanism, thereby causing the lead screw to rotate, and the base on the lead screw moves along the length direction of the lead screw, so that the outer tube of the table leg is displaced relative to the inner tube of the table leg , the table leg lifts up and down.

The length of the crossbeam of this existing lifting table can be adjusted, so that it is suitable for the installation of table boards of different lengths and sizes; therefore, the length of the transmission assembly is also adjustable, and this lifting table has at least one set of transmission assemblies, each set of transmission The structure of the assembly includes two transmission rods and a hollow transmission tube. One end of the transmission rod cooperates with the screw lifting mechanism on the corresponding table leg, and the other end of the transmission rod slides and fits in the transmission tube, and the screw connection on the transmission tube is locked Nut, when adjusting the telescopic length of the drive rod, first loosen the lock nut, pull the drive rod out or retract the drive tube, then tighten the lock nut with a wrench to fix the position of the drive rod and the drive tube.

But what this transmission rod industry usually adopts is a hexagonal rod. Wherein in the assembly process, first insert two hexagonal rods into the sockets on the screw lifting mechanism in the corresponding table legs. Then one of the hexagonal rods is first inserted into a socket of the transmission tube to fit, and the position of the transmission tube is relatively fixed at this time. In order to keep the transmission tube and the hexagonal rod relatively fixed in the circumferential direction, the insertion hole of the transmission tube must also be hexagonal. And when another hexagonal rod wants to be inserted into another socket of the transmission tube, there may be a problem that the hole positions of the hexagonal rod and the socket of the transmission tube cannot be matched and aligned. It is necessary to turn another hexagonal rod at a certain angle to insert it into the transmission tube to complete the assembly. It is easy to understand that the angle of each corner of the hexagonal rod is 60°. If the angle of rotation is 60°, then the hexagonal rod connected The lifting mechanism of the screw rod will move accordingly, so that the table can be raised and lowered by a certain height on one side, resulting in the problem of height difference on both sides of the table.

technical solution

The present invention overcomes the disadvantages of the above prior art and provides a transmission assembly that is easy to assemble, and the connecting rods on both sides of the sleeve can be plugged and mated with the sleeve without rotating a large angle.

At the same time, the invention proposes a method that after inserting the connecting rod into the socket on the screw lifting mechanism in the corresponding table leg, the connecting rod only needs to be rotated slightly to complete the plug-in assembly with the sleeve, and there will be no height difference on both sides of the table. Poor desk.

Technical scheme of the present invention is realized like this:

A transmission assembly for furniture power transmission, comprising a sleeve and two connecting rods, the two connecting rods are located on opposite sides of the sleeve in the length direction of the sleeve, and the sleeve is provided with Extended connecting channel, each connecting rod is provided with a connecting piece that can be inserted into the connecting channel at one end of the connecting rod close to the sleeve. When the connecting piece is inserted in the connecting channel, the connecting rod can move along the The length direction of the sleeve slides; and the inner wall of the connecting channel is densely covered with a plurality of first teeth along the circumference, and the connecting piece is densely covered with a plurality of second teeth around itself. When inserted into the connecting passage, the first tooth and the second tooth are engaged so that the connecting rod and the sleeve remain relatively fixed in the circumferential direction.

In a further embodiment, the number of second teeth on each connecting rod is at least 12. Avoid excessive angles formed between adjacent teeth. It is easy to understand that the more second teeth on each connecting rod, the smaller the angle formed between two adjacent second teeth, and the smaller the angle that the connecting rod needs to rotate when assembling. The second tooth connecting rod can be inserted into the sleeve and engaged with the first tooth to complete the assembly only by turning a small angle. Since the number of second teeth on each connecting rod is at least 12, it can be ensured that the angle formed between two adjacent second teeth is less than a certain degree, which facilitates the assembly of the connecting rod.

In a further solution, the number of second teeth on each connecting rod is 12-24. On the same connecting rod, the more the second teeth are, the thinner the thickness of the second teeth will be, and the second teeth will be easily broken if they are too thin. The number of second teeth on each connecting rod is 12 to 24, which can meet the assembly requirements of the connecting rod, and can also prevent the teeth from being too thin and easily broken due to too many teeth.

In a further solution, the sleeve has a head end and a tail end along its length direction, and the connection channel runs through from the head end of the sleeve to the tail end of the sleeve.

In a further solution, the middle section of the connecting channel does not pass through so as to form sockets at both ends of the sleeve into which connectors can be inserted, and the inner wall of the socket is provided with the first teeth, each The connecting pieces on the connecting rod can be inserted into the adjacent sockets.

In a further solution, a locking assembly is also included, and when the connecting rod slides to a designated position along the length direction of the sleeve, the locking assembly can act on the sleeve so that the sleeve and the connecting rod remain relatively fixed. It is avoided that after the transmission assembly is assembled on the lifting table, the connecting rod is detached from the sleeve while the lifting table is going up and down.

In a further solution, the locking assembly includes two locking screws, the sleeve includes an outer cylinder and an elastic inner cylinder, both the inner cylinder and the outer cylinder have a hollow passage running through their length, the inner cylinder The cylinder is located in the hollow passage of the outer cylinder, and the inner cylinder and the outer cylinder are fixedly connected by a connecting block, the hollow passage of the inner cylinder constitutes the connecting passage, and the outer cylinder is provided with two Threaded holes, the two threaded holes correspond to the two connecting rods respectively, the two locking screws are respectively inserted into the two threaded holes, when the connecting rod slides to the specified position along the length direction of the sleeve, the corresponding threaded holes The locking screw is twisted to press the inner cylinder, forcing the inner cylinder to clamp the connecting piece on the connecting rod, so that the sleeve and the connecting rod remain relatively fixed.

The present invention also proposes an elevating table, which includes a table board, two table legs and the transmission assembly in the above solution, the two table legs correspond to the two connecting rods one by one, and a useful For the screw lifting mechanism that drives the tabletop up and down, there is a socket on the screw lifting mechanism that can cooperate with the connecting rod, and the head of the connecting rod that is not provided with the connecting piece is inserted into the socket The inside is connected with the transmission of the screw mandrel lifting mechanism.

Beneficial effect

Since the inner wall of the connecting channel of the sleeve is densely covered with a plurality of first teeth along the circumferential direction, the connecting piece is densely covered with a plurality of second teeth around its circumference, even if the hole position of the connecting piece and the connecting channel is not aligned , only need to rotate the angle between the two adjacent first teeth, the insertion can be realized, and the required rotation angle of the connecting rod will be very small. When the connecting rod is installed in the lifting table, and the connecting rod is inserted into the socket on the screw lifting mechanism for transmission connection, since the connecting rod can be inserted into the sleeve only by rotating a very small angle, the screw lifting mechanism drives the table The height of the board lifting is very small, even without driving the table board to lift, it can avoid the problem of height difference between the two sides of the table board.

Description of drawings

Fig. 1 is the schematic structural view and partial enlarged view of transmission assembly in embodiment 1;

Fig. 2 is the structural representation and partial enlarged view of connecting rod in embodiment 1;

Fig. 3 is the schematic structural view and partial enlarged view of sleeve in embodiment 1;

Fig. 4 is the front view of lifting table in embodiment 1;

Fig. 5 is a schematic diagram and a partial enlarged view of the cooperation between the screw lifting mechanism and the connecting rod in embodiment 1;

Fig. 6 is a side sectional view and a partially enlarged view of the transmission assembly in Embodiment 1;

Fig. 7 is a side sectional view of the sleeve in Embodiment 2.

The reference signs are: 1-table board, 2-table leg, 3-sleeve, 4-connecting rod, 5-screw mandrel, 6-screw nut, 7-socket, 8-connecting channel, 9-connecting piece, 10-first teeth, 11-second teeth, 12-outer cylinder, 13-inner cylinder, 14-connecting block, 15-lock screw, 16-jack.

Embodiments of the present invention

The specific embodiment of the present invention is as follows:

Embodiment 1: As shown in Figures 1-6, the present invention provides a lift table, which includes a table board 1, two table legs 2 and a transmission assembly for power transmission of furniture.

The transmission assembly includes a sleeve 3 and two connecting rods 4, the sleeve 3 and the connecting rod 4 both extend along the length direction of the table 1, and the two connecting rods 4 are located on opposite sides of the sleeve 3 in the length direction of the sleeve 3. side. And in this program, each table leg 2 is provided with a screw lifting mechanism that is connected to the table 1 and can be used to drive the lifting of the table 1. The screw lifting mechanism has a socket 7 that can cooperate with the connecting rod 4 .

As an example, as shown in FIG. 5 , this solution schematically shows the assembly relationship between the screw lifting mechanism and the connecting rod 4 . The screw lifting mechanism includes a screw 5 , and a screw nut 6 is threaded on the screw 5 . And the screw mandrel 5 is provided with the first helical gear, the fixed drive motor on the side of the screw mandrel 5 is connected with a gearbox, the gearbox is provided with a transmission rod, and the transmission rod is provided with the second helical gear to match the first helical gear Transmission connection, at this time, the gearbox is provided with the above-mentioned socket 7 that can cooperate with the connecting rod 4, and the connecting rod 4 is inserted into the socket 7 for transmission connection. Of course, in this solution, only a schematic example is given for the structure of the screw lifting mechanism and the assembly relationship between the screw lifting mechanism and the connecting rod 4 . The screw lifting mechanism can also be of other structures, and the transmission assembly is also applicable to screw lifting mechanisms of other structures, only the socket 7 that can be inserted into the connecting rod 4 needs to be left. The specific structure of the screw lifting mechanism and the connection relationship with the plate of the table screw lifting mechanism are common knowledge in this field, and are not the focus of the invention of the present invention, so they will not be described too much. The sleeve 3 and the two connecting rods 4 are located between the two table legs 2. The connecting rods 4 correspond to the adjacent table legs 2 one by one. One end of the connecting rod 4 is inserted into the adjacent table legs 2. The socket 7 of the mechanism is connected with the transmission of the screw mandrel lifting mechanism.

In this solution, as shown in Figure 6, the sleeve 3 is provided with a connecting channel 8 extending along its own length direction. The sleeve 3 has a head end and a tail end along its own length direction. end through to the tail end of the sleeve 3. Please refer to FIGS. 1-3 , and the head of each connecting rod 4 close to the sleeve 3 is provided with a connecting piece 9 that can be inserted into the above-mentioned connecting channel 8 . In this solution, the connecting piece 9 is set on the connecting rod 4 and kept relatively fixed with the connecting rod 4, which can be installed by welding or interference fit. Of course, it is also feasible that the connecting piece 9 is not sleeved on the connecting rod 4 but is directly welded and fixed to the head of the connecting rod 4 . In the case of ensuring that the connecting piece 9 and the connecting rod 4 remain relatively fixed, the connection method between the connecting piece 9 and the connecting rod 4 is not limited.

In this solution, at least 12 second teeth 11 are densely distributed on the connecting member 9 around itself, and a plurality of first teeth 10 are densely distributed on the inner wall of the connecting passage 8 along the circumference. When the connecting piece 9 is inserted into the connecting channel 8, the connecting rod 4 can slide along the length direction of the sleeve 3, and since the first tooth 10 is engaged with the second tooth 11, the connecting rod 4 and the sleeve 3 are in the circumferential direction. remain relatively fixed. Specifically, the number of second teeth 11 on each connecting rod 4 is 12-24.

During the assembly process of the transmission assembly and the table leg 2, the two connecting rods 4 are first inserted into the sockets 7 of the screw lifting mechanism in the corresponding table leg 2. Then the sleeve 3 is inserted into one of the connecting rods 4 (that is, the connecting piece 9 of one of the connecting rods 4 is inserted into the connecting channel 8 ). At this time, the position of the sleeve 3 is relatively fixed. Finally, another connecting rod 4 is inserted into the sleeve 3 to complete the assembly. In the process of inserting another connecting rod 4 into the sleeve 3 to complete the assembly, since the connecting piece 9 is densely covered with a plurality of second teeth 11 around its circumference, it only needs to be rotated to form a joint between the two second teeth 11. angle. As an example only, if the number of second teeth 11 on each connecting rod 4 in this solution is 20, the angle formed between adjacent second teeth 11 is only 12°. The connecting rod 4 can be inserted into the connecting channel 8 of the sleeve 3 and assembled with the sleeve 3 only by turning 12° at most. Because its rotation angle is small, it can avoid the problem of unevenness on both sides of the table board 1 due to the action of the screw rod lifting mechanism.

At the same time, the transmission assembly in this solution also includes a locking assembly. When the connecting rod 4 slides to a designated position along the length direction of the sleeve 3, the locking assembly can act on the sleeve 3 so that the sleeve 3 and the connecting rod 4 remain relatively fixed.

Specifically, as shown in FIG. 6 , the locking assembly in this solution includes two locking screws 15 . The sleeve 3 includes an outer cylinder 12 and an elastic inner cylinder 13, and the material of the inner cylinder 13 can be plastic or elastic metal parts. In addition, both the inner cylinder 13 and the outer cylinder 12 have a hollow passage running through their length direction, the inner cylinder 13 is located in the hollow passage of the outer cylinder 12, and the inner cylinder 13 and the outer cylinder 12 are fixedly connected by a connecting block 14, and the inner cylinder 13 and the outer cylinder 12 are fixedly connected by a connecting block 14. The hollow passage of the barrel 13 constitutes the above-mentioned connecting passage 8 . At the same time, the outer cylinder 12 is provided with two threaded holes, the two threaded holes correspond to the two connecting rods 4 respectively, and the two locking screws 15 are respectively inserted into the two threaded holes. When the connecting rod 4 slides to the specified position along the length direction of the sleeve 3, the locking screw 15 in the corresponding threaded hole is twisted to press the inner cylinder 13, so that the inner cylinder 13 is deformed and the inner cylinder 13 is forced to clamp the connecting rod 4 The connecting piece 9, so that the sleeve 3 and the connecting rod 4 remain relatively fixed. Prevent the connecting rod 4 from slipping out of the sleeve 3 during the lifting process of the table leg 2 .

Embodiment 2: As shown in FIG. 7 , the main difference between this embodiment and the lifting table in the above-mentioned Embodiment 1 is that the middle section of the connecting channel 8 in this embodiment does not pass through so as to form a movable table at both ends of the sleeve 3 . Insert into socket 16 of connector 9 . The assembly is realized when the connecting pieces 9 on the two connecting rods 4 are respectively inserted in the two sockets 16 .

the

Claims

A transmission assembly for furniture power transmission, characterized in that it includes a sleeve and two connecting rods, the two connecting rods are located on opposite sides of the sleeve in the length direction of the sleeve, and the sleeve is provided with A connecting channel extending along its own length, each connecting rod is provided with a connecting piece that can be inserted into the connecting channel on the head of one end of each connecting rod close to the sleeve. When the connecting piece is inserted into the connecting channel, the The connecting rod can slide along the length direction of the sleeve; and the inner wall of the connecting channel is densely covered with a plurality of first teeth along the circumference, and the connecting piece is densely covered with a plurality of second teeth around its circumference, When the connecting piece is inserted into the connecting channel, the first teeth and the second teeth are engaged so that the connecting rod and the sleeve remain relatively fixed in the circumferential direction.
The transmission assembly for power transmission of furniture according to claim 1, wherein the number of second teeth on each connecting rod is at least 12.
The transmission assembly for power transmission of furniture according to claim 2, wherein the number of second teeth on each connecting rod is 12-24.
The transmission assembly for power transmission of furniture according to claim 1, wherein the sleeve has a head end and a tail end along its length direction, and the connecting channel runs through from the head end of the sleeve to the tail end of the sleeve end.
The transmission assembly for power transmission of furniture according to claim 1, characterized in that: the middle section of the connecting passage is not penetrated so as to form sockets at both ends of the sleeve into which connectors can be inserted, and the sockets The inner wall of the hole is provided with the first teeth, and the connecting piece on each connecting rod can be inserted into the adjacent socket.
The transmission assembly for power transmission of furniture according to claim 1, further comprising a locking assembly, when the connecting rod slides to a designated position along the length of the sleeve, the locking assembly can act on the on the sleeve so that the sleeve and the connecting rod remain relatively fixed.
The transmission assembly for power transmission of furniture according to claim 6, wherein the locking assembly includes two locking screws, the sleeve includes an outer cylinder and an elastic inner cylinder, and the inner cylinder and the outer cylinder Each cylinder has a hollow passage running through its length direction, the inner cylinder is located in the hollow passage of the outer cylinder, and the inner cylinder and the outer cylinder are fixedly connected by a connecting block, and the hollow passage of the inner cylinder constitutes the hollow passage of the outer cylinder. The above-mentioned connecting channel, and the outer cylinder is provided with two threaded holes, the two threaded holes correspond to the two connecting rods respectively, the two locking screws are respectively inserted in the two threaded holes, and the connecting rods are inserted along the sleeve When sliding to a designated position in the length direction, the locking screw in the corresponding threaded hole is twisted to press the inner cylinder, forcing the inner cylinder to clamp the connecting piece on the connecting rod, so that the sleeve and the connecting rod remain relatively fixed.
A lift table, characterized in that it includes a table board, two table legs and the transmission assembly described in any one of claims 1-7, the two table legs correspond to the two connecting rods one by one, each Each table leg is provided with a screw lifting mechanism for driving the table board to lift, the screw lifting mechanism has a socket that can cooperate with the connecting rod, and the connecting rod is not provided with an end of the connecting piece. The rod head is inserted into the socket for transmission connection with the screw rod lifting mechanism.

the