CN219479488U - Single power source lifting folding mechanism and furniture - Google Patents

Abstract

The utility model discloses a single-power-source lifting folding mechanism and furniture, wherein the lifting folding mechanism comprises a first lifting mechanism, a second lifting mechanism, a first flexible rope and a driving device, the first lifting mechanism comprises a first movable part and a first fixed part, the upper part and the lower part of the first movable part are respectively rotatably provided with a first movable pulley and a second movable pulley, the second lifting mechanism comprises a second movable part and a second fixed part, the upper part of the second movable part is rotatably provided with a third movable pulley, the other end of the first flexible rope is fixedly connected with the second fixed part after bypassing the second movable pulley, the first movable pulley and the third movable pulley in sequence, and the driving device is arranged on the second fixed part and connected with a second movable part or a first cross beam or a table top. The utility model plays a role in transmitting power in the lifting process through the cooperation of the flexible rope and the movable pulley, so that the synchronous lifting of all lifting mechanisms can be realized by only one driving device.

Description

Single power source lifting folding mechanism and furniture

Technical Field

The utility model relates to a single-power-source lifting folding mechanism and furniture.

Background

The table is used as a daily living article, the table is formed by fixedly connecting a table top and table legs, the height of the table legs is fixed, so that the height of the whole table top is fixed and not adjustable, and along with different application environments and application requirements of different crowds, the requirements on the diversity, the automation degree and the comfort degree of the table are also higher and higher.

In order to adjust the height of the table according to the requirement, chinese patent publication number CN204071049U discloses a lifting table, which comprises a table top, a baffle plate, an upper hydraulic column, a lower hydraulic column and a driving device, wherein the baffle plate is arranged on one side of the top surface of the table top, the upper hydraulic column, the lower hydraulic column and the driving device are combined into a supporting column, and the four supporting columns are respectively arranged at four corners of the table top. When in use, the driving device is started to lift the tabletop to a proper position. The lifting table is provided with four supporting columns, so that the four supporting columns are required to be controlled to synchronously lift, if the four supporting columns are not synchronous, the tabletop is inclined or a specific inclination angle cannot be maintained, if the tabletop is lifted, one supporting column is slow in extending speed, the lifting speed of the tabletop connected with the supporting column is slow, when the tabletop height is adjusted, the tabletop at the supporting column is inclined downwards, objects placed on the tabletop are likely to slide down due to the inclination of the tabletop, and when the four supporting columns are required to independently control the lifting, the lifting synchronism of the four supporting columns is difficult to control, and in order to realize lifting of the tabletop everywhere in the prior art, a plurality of lifting supporting columns are required to be arranged.

The lifting table disclosed in the Chinese patent with the publication number of CN213992819U is provided with at least two table legs, wherein the table legs are electric, pneumatic or hydraulic lifting upright posts, the lifting upright posts with the model of OKIN-DD06.301 are optimally adopted, and when the table legs cannot synchronously lift, the table plate can be inclined or cannot maintain a specific inclination angle.

Disclosure of Invention

The utility model aims to provide a single-power-source lifting folding mechanism, which solves the technical defect that in the prior art, a synchronous lifting mechanism on furniture adopts two driving structures, so that the lifting synchronicity of two sides of a part on the lifting folding mechanism is poor, and the furniture table top is inclined.

In order to solve the problems, the utility model adopts the following technical scheme: the utility model provides a single power supply goes up and down folding mechanism, including first elevating system, second elevating system, first flexible cable and drive arrangement, first elevating system includes first movable part and first fixed part, first movable part installs on first fixed part and constitutes the revolute with first fixed part, first movable pulley and second movable pulley are installed respectively to upper portion and the lower part of first movable part, second elevating system includes second movable part and second fixed part, second movable part slidable mounting is on second fixed part, the third movable pulley is installed on the upper portion of second movable part, one end and the first fixed part fixed connection of first flexible cable, the other end of first flexible cable is walked around second movable pulley, behind first movable pulley and the third movable pulley and with second fixed part fixed connection, drive arrangement installs on second fixed part, drive arrangement directly or indirectly jack up the axis of rotation of third movable pulley and tensioning first flexible cable. The utility model only sets a driving device, when the driving device drives the second movable part or the first beam connecting the first movable part and the second movable part or one side of the table top supported by the utility model and connected with the first movable part to rise or fall, and the third movable pulley rises or falls along with the second movable part and is pulled to the first movable part to rise or fall synchronously, thereby driving the other side of the table top or the beam to rise or fall synchronously.

The utility model further comprises a third lifting mechanism and a second flexible rope, wherein the third lifting mechanism comprises a third movable part and a third fixed part, the third movable part is arranged on the third fixed part and can slide on the third movable part, a fourth movable pulley and a fifth movable pulley are respectively arranged on the upper part and the lower part of the third movable part, a sixth movable pulley is arranged on the upper part of the first movable part or the second movable part, one end of the second flexible rope is fixedly connected with the third fixed part, the other end of the second flexible rope bypasses the fifth movable pulley, the fourth movable pulley and the sixth movable pulley and is fixedly connected with the first fixed part or the second fixed part, and the second flexible rope is in a tensioning state. The utility model is provided with the third lifting mechanism and the second flexible rope, and the power is transmitted through the second flexible rope, so that the first lifting mechanism, the second lifting mechanism and the third lifting mechanism synchronously lift, and when the utility model supports a larger table top, more supporting points are provided for the table top, and the stability of the table top in a use state is improved while the synchronous lifting of the table top is maintained.

As a further improvement of the present utility model, a pulley mount is mounted on an upper portion of the first movable member, the pulley mount moves synchronously with the movement of the first movable member, and the first movable pulley and the fourth movable pulley are both mounted on the pulley mount. According to the utility model, the pulley mounting seat is arranged, so that the first movable pulley and the fourth movable pulley are conveniently mounted, and the first movable pulley and the fourth movable pulley can be effectively ensured not to be mutually interfered.

The utility model further comprises more than one fourth lifting mechanism and third flexible ropes, the number of the third flexible ropes is the same as that of the fourth lifting mechanism, the fourth lifting mechanism comprises a fourth movable part and a fourth fixed part, the fourth movable part is arranged on the fourth fixed part in a sliding way, a seventh movable pulley and an eighth movable pulley are respectively arranged at the upper part and the lower part of the fourth movable part, a ninth movable pulley is arranged at the upper part of the first movable part or the second movable part or the third movable part, one end of each third flexible rope is fixedly connected with the fourth fixed part, the other end of each third flexible rope bypasses the eighth movable pulley, the seventh movable pulley and the ninth movable pulley and is fixedly connected with the first fixed part or the second fixed part or the third movable part, and the third flexible ropes are in a tensioning state so that the fourth movable part and the first movable part, the second movable part and the third movable part are synchronously lifted. The utility model is provided with one or a plurality of fourth lifting mechanisms, and the fourth movable parts of the fourth lifting mechanisms, the first movable parts, the second movable parts and the third movable parts are synchronously lifted through the power transmitted by the third flexible wires, so that the number of driving devices is not increased.

As a further improvement of the utility model, the first movable part and the first fixed part are both tubular, the first fixed part is sleeved on the first movable part, and a sliding guide assembly is arranged on the first movable part and used for guiding the sliding of the first movable part in the first fixed part. The utility model adopts the tubular movable part and the fixed part, so that the sliding installation of the movable part and the fixed part is more convenient, and the sliding of the movable part relative to the fixed part is smoother by arranging the sliding guide component.

As a further improvement of the utility model, the first fixing part comprises a first fixing part body and a first fixing rod, the first movable part is slidably arranged with the first fixing part body, the first fixing rod stretches into the first movable part, the top end of the first fixing rod is higher than the second movable pulley, and the end part of the first flexible rope is fixedly connected with the upper part of the first fixing rod. The first fixing rod is arranged and extends into the first movable part, so that the first flexible rope can be fixedly connected with the first fixing part from the first movable part without grooving on the first movable part, and the first flexible rope passes through the first movable part and is fixedly connected with the first fixing part, thereby facilitating the assembly of the utility model.

As a further development of the utility model, the first fixing rod is made of metal profiles or bars or tubes. The utility model adopts metal section bars such as channel steel, angle steel, square steel and the like or metal bars such as metal bars and the like, ensures the strength of the first fixing bar, avoids deformation such as bending and the like in a use state, and reduces the ascending and descending synchronism of each part of the utility model.

As a further development of the utility model, the first lifting mechanism and the second lifting mechanism are parallel and have an angle with the vertical direction. The utility model can be properly arranged according to the space in the use state, so that the table top supported by the utility model meets the space requirement.

As a further improvement of the utility model, the driving device adopts a gas spring, a pressure cylinder of the gas spring is arranged on the second fixed part, a piston rod of the gas spring is connected with the second movable part or the first cross beam or the table top, or the piston rod of the gas spring is connected with the second fixed part, the pressure cylinder of the gas spring is connected with the second movable part or the first cross beam or the table top, and the piston rod of the gas spring stretches and contracts to drive the second movable part or the first cross beam or the table top to lift. The utility model adopts the gas spring to drive the whole lifting, is convenient for controlling the lifting, is convenient for the installation of the driving device, and reduces the space occupied by the driving device.

The utility model further aims to provide furniture which solves the technical defect that the table top is inclined due to poor lifting synchronism of each supporting part when the table top of the furniture is lifted in the prior art.

In order to solve the problems, the utility model adopts the following technical scheme: a piece of furniture comprises a single power source lifting folding mechanism, a table top of the piece of furniture is fixedly connected with the top of the single power source lifting folding mechanism, and lifting of the single power source lifting folding mechanism is used for adjusting the height of the table top of the piece of furniture. The lifting folding mechanism has good lifting synchronism, so that when the lifting folding mechanism is used, all parts of the table top are lifted synchronously, and the table top is in a synchronous lifting state in any state, so that inclination cannot be generated or the table top is in an initial inclined state, and the same inclination angle is still kept when the lifting folding mechanism is lifted.

As a further improvement of the utility model, more than one fixed pulley is arranged at the bottom of the table top, and the first flexible rope and/or the second flexible rope and/or the third flexible rope bypass the fixed pulley, so that the first flexible rope and/or the second flexible rope and/or the third flexible rope are all positioned below the table top. The utility model ensures that the furniture table-board can be lifted synchronously so as not to incline, and the utility model can properly arrange the fixed pulleys according to the shape of the furniture table-board to limit the positions of the first flexible rope and/or the second flexible rope and/or the third flexible rope so that the first flexible rope and/or the second flexible rope and/or the third flexible rope can not be partially positioned outside under the table.

In summary, the beneficial effects of the utility model are as follows: the lifting mechanism can realize synchronous lifting of all lifting mechanisms by only one driving device through the cooperation of the flexible rope and the movable pulley, and the problem that the table top supported by the lifting device is inclined because the synchronous work of the driving devices is difficult to control due to the arrangement of the driving devices is avoided.

Drawings

Fig. 1 is a schematic diagram of the displacement of the second movable pulley and the displacement analysis of the first flexible cable in the present utility model.

Fig. 2 is a schematic diagram of the displacement of the first traveling block movement and the first cable movement displacement analysis according to the present utility model.

Fig. 3 is a diagram showing the analysis of the displacement of the movable pulley block and the displacement of the first flexible cable, wherein the movable pulley block consists of the first movable pulley and the second movable pulley.

Fig. 4 is a schematic diagram of the displacement of the third traveling block movement and the displacement analysis of the first cable movement according to the present utility model.

Fig. 5 is a schematic diagram of the connection of the traveling block to the first flexible cable in the present utility model.

FIG. 6 is a schematic diagram of the movement and displacement analysis of the first, second and third movable pulleys according to the present utility model.

Fig. 7 is a schematic diagram of a traveling block and a first flexible cable connection according to the present utility model.

Fig. 8 is a schematic perspective view of embodiment 1.

Fig. 9 is a longitudinal sectional view of embodiment 1.

Fig. 10 is a schematic perspective view of the movable pulley and the first flexible cable in embodiment 1.

Fig. 11 is a schematic diagram of winding the first flexible cable around the first movable pulley and the second movable pulley in embodiment 1.

Fig. 12 is a schematic view of the movable member of embodiment 1 sleeved outside the fixed member.

Fig. 13 is a perspective sectional view of the embodiment 1 in which the movable member is fitted over the fixed member.

Fig. 14 is a schematic perspective view of embodiment 2.

Fig. 15 is a schematic diagram showing the winding of the traveling block and the flexible wire in example 2.

Fig. 16 is a schematic view showing the structure of the pulley mount in embodiment 2, with the first movable pulley and the sixth movable pulley.

Fig. 17 is a schematic perspective view of embodiment 5.

Fig. 18 is a schematic perspective view of the ascending structure of example 5.

Fig. 19 is a schematic diagram of the driving device installed at a side close to the first elevating mechanism.

Fig. 20 is a schematic diagram showing the driving means installed on the side close to the first elevating mechanism to be inclined by force.

Fig. 21 is a schematic diagram of the drive device connected to the second movable member against the rotational axis of the third movable sheave.

Fig. 22 is a schematic diagram of the drive device being connected to the table against the axis of rotation of the third movable sheave.

Wherein: 1. a first lifting mechanism; 2. a second lifting mechanism; 3. a first flexible cable; 4. a driving device; 5. a first movable member; 5-1, an inner movable part body; 5-2, an inner movable part body; 6. a first fixing member body; 7. a first movable pulley; 8. a second movable pulley; 9. a second movable member; 10. a second fixing member body; 11. a third movable pulley; 12. a first cross beam; 13. a table top; 14. a third lifting mechanism; 15. the second flexible rope; 16. a third movable member; 17. a third fixing member body; 18. a fourth movable pulley; 19. a fifth movable pulley; 20. a sixth movable pulley; 21. a second cross beam; 22. a pulley mounting seat; 23. a sliding guide assembly; 24. a first fixing rod; 25. a pressure cylinder; 26. a piston rod; 27. a first support plate; 28. a second support plate; 29. and a third fixing rod.

Detailed Description

The following describes the embodiments of the present utility model further with reference to the drawings.

Example 1

The single power source lifting folding mechanism as shown in fig. 8 to 11, in the furniture field, the lifting of the furniture table is also called folding, the single power source lifting folding mechanism comprises a first lifting mechanism 1, a second lifting mechanism 2, a first flexible rope 3 and a driving device 4, the first lifting mechanism 1 comprises a first movable part 5 and a first fixed part, the first fixed part in the embodiment comprises a first fixed part body 6 and a first supporting plate 27, the bottom end of the first supporting part body is fixedly connected with the first supporting plate 27, the first supporting plate 27 and the first fixed part body are in an inverted T shape as a whole, the contact area between the first lifting mechanism 1 and the ground is increased by the first supporting plate 27, the stability is improved, the first movable part 5 is arranged on the first fixed part body 6 and forms a moving pair with the first fixed part body 6, the first movable part 5 and the first fixed part body 6 in this embodiment are both tubular, the cross-sectional shapes of the first movable part 5 and the first fixed part body 6 are the same, and may be regular shapes such as triangle, quadrangle, pentagon, etc. or other irregular shapes, the first fixed part body 6 is sleeved on the first movable part 5, and a sliding guide assembly 23 is provided on the first movable part 5 for guiding the sliding of the first movable part 5 in the first fixed part body 6, the sliding guide assembly 23 in this embodiment includes a fixed sleeve fixed on the first sliding part 5 and a sliding member rotatably provided on the fixed sleeve, the sliding member may be a ball, a roller, etc., by means of the sliding member, the sliding member can slide up and down relative to the first movable part 5 relative to the first fixed part body 6, in this embodiment, the first movable pulley 7 and the second movable pulley 8 are rotatably mounted on the upper portion and the lower portion of the first movable member 5 by rotating shafts, and in this embodiment, the first movable pulley 7 and the second movable pulley 8 are optimally mounted on the top and the bottom of the first movable member 5, respectively.

The second lifting mechanism 2 in this embodiment includes a second movable part 9 and a second fixed part, the second fixed part in this embodiment includes a second fixed part body 10 and a second support plate 28, the bottom end of the second fixed part body 10 is fixedly connected with the second support plate 28, the second support plate 28 and the second fixed part are in inverted T shape, the contact area between the second lifting mechanism 2 and the ground in the use state is increased by the second support plate 28, the second movable part 9 is slidably mounted on the second fixed part body 10, the shape and height of the second movable part 9 in this embodiment are the same as those of the first movable part 5, the shape and height of the second fixed part body 10 are the same as those of the first fixed part body 6, the third movable pulley 11 is rotatably mounted on the upper portion of the second movable part 9 by adopting a rotating shaft, the height of the third movable pulley 11 and the first movable pulley 7 in this embodiment is the same, the third movable pulley 11 is optimally mounted on the top of the second movable part 9, and the second movable part 9 is mounted in this embodiment by adopting a sliding guide assembly 23.

The first movable component 5 and the second movable component 9 in this embodiment are used for being connected with the first beam 12 or the table top 13 in a use state, one end of the first flexible cable 3 is fixedly connected with the first fixed component above the second movable pulley 8, such as welding, etc., and the other end of the first flexible cable 3 bypasses the second movable pulley 8 downwards and then upwards and then bypasses the first movable pulley 7, and bypasses the third movable pulley 11 towards the second movable component 9 along the horizontal direction, and then is fixedly connected with the second fixed component downwards, such as welding, etc.

The driving device 4 in this embodiment is mounted on the second support plate 28 of the second fixed component and is connected to the second movable component 9 or the first beam 12 or the table top 13, the driving device 4 directly or indirectly props against the rotating shaft of the third movable pulley 11 and tightens the first flexible cable 3 through the second movable component 9 or the first beam 12 or the table top 13, and the driving device 4 drives one side of the first beam 12 or the table top 13 connected with the second movable component 9 or the second movable component 9 to lift and drive the first flexible cable 3 to transmit power to the first lifting mechanism 1 to drive the other side of the first beam 12 or the table top 13 and the second movable component 9 to lift synchronously. The driving device 4 in this embodiment preferably adopts a gas spring, the pressure cylinder 25 of the gas spring is mounted on the second supporting plate 28 of the second fixed component, the piston rod 26 of the gas spring stretches in the up-down direction, the end of the piston rod 26 of the gas spring is connected with the second movable component 9 or the first cross beam 12 or the table top 13, the piston rod 26 of the gas spring stretches to drive the second movable component 9 or the first cross beam 12 or the table top 13 to lift, in this embodiment, the piston rod 26 of the gas spring can also be connected with the second supporting plate 28 of the second fixed component, and the pressure cylinder 25 of the gas spring is connected with the second movable component 9 or the first cross beam 12 or the table top 13. The air spring in this embodiment may also be a hydraulic cylinder, a pneumatic cylinder, an electric push rod, a manual drive push rod, or the like.

In this embodiment, the reason why the driving device 4 needs to directly or indirectly support the rotation shaft of the third movable pulley 11 and tension the first flexible cable 3 is analyzed as follows: in the case where the driving device 4 does not directly or indirectly support the rotation shaft of the third movable pulley 11 and tension the first flexible cable 3 within the supporting range of the second lifting mechanism 2 as shown in fig. 19, for example, the driving device 4 is disposed on the side of the second lifting mechanism 2 and close to the first lifting mechanism 1, an external force F is applied to the outside on the side far from the first lifting mechanism 1 beyond the supporting range of the second lifting mechanism 2, and the side of the table top 13 far from the first lifting mechanism 1 moves downward first as shown in fig. 20, thereby causing an unbalanced state of instability of the entire table top and making the table top unable to be lifted synchronously everywhere. The solution of the present embodiment for directly or indirectly supporting the driving device 4 against the rotation axis of the third movable pulley 11 and tensioning the first flexible cable 3 is that the driving device 4 is within the supporting range of the second lifting mechanism 2, as shown in fig. 21, if the driving device 4 is disposed inside the second lifting mechanism 2 and is directly connected with the second movable component 9, this solution is the optimal solution of the present embodiment, or as shown in fig. 22, the driving device 4 is located at the side far away from the first lifting mechanism 1 to support the table top 13, in this case, after the driving device 4 supports against the rotation axis of the third movable pulley 11, the first flexible cable 3 is in a tensioned state, and when the table top 13 is pressed downward, the driving device 4 supports against the rotation axis of the third movable pulley 11, and the first flexible cable 3 is still in a tensioned state.

The principle of realizing synchronous lifting of the first lifting mechanism 1 and the second lifting mechanism 2 driven by the gas spring in the embodiment is as follows: when the gas spring drives the second movable part 9 or the first cross beam 12 or the table top 13 to ascend, the first movable part 5 is pulled to synchronously ascend by the equal distance by the power transmitted by the first flexible rope 3, so that the first lifting mechanism 1 and the second lifting mechanism 2 synchronously ascend, and when the second movable part 9 or the first cross beam 12 or the table top 13 moves downwards, if the first cross beam 12 or the table top 13 is pressed downwards, the first flexible rope 3 transmits the power to the first movable pulley 7 and the second movable pulley 8 to drive the first cross beam 12 or the table top 13 and the first movable part 5 to synchronously descend, so that the first lifting mechanism 1 and the second lifting mechanism 2 synchronously descend.

The first flexible cord 3 in this embodiment may be any one of various rubber belts, ropes, steel wires, steel belts, fiber wires, chains, etc., and the corresponding first movable pulley 7, second movable pulley 8, and third movable pulley 11 may be pulleys, sprockets, etc. adapted to the first flexible cord 3.

The principle of the first flexible cable 3 moving in cooperation with the first movable pulley 7, the second movable pulley 8 and the third movable pulley 11 in this embodiment is described as follows:

It is well known that the pulleys whose shaft positions move together with the pulled object are called movable pulleys, and the first movable pulley 7 and the second movable pulley 8 in this embodiment are both mounted on the first movable member 5, so that when the first movable member 5 moves up and down, the shafts of the first movable pulley 7 and the second movable pulley 8 move up and down, and therefore the first movable pulley 7 and the second movable pulley 8 in this embodiment are both movable pulleys, and the third movable pulley 11 is mounted on the second movable member 9, and the second movable member 9 also moves up and down in the use state, so that the third movable pulley 11 in this embodiment is also a movable pulley.

In a general state, a plurality of movable pulleys cannot effectively form an independent pulley block which fully functions without the participation of a fixed pulley, in the present application, since the first movable part 5 and the second movable part 9 slide relative to the first fixed part body 6 and the second fixed part body 10 respectively, the independent movable pulley block in the present application can form and fully function, in a general single movable pulley parallel double-rope system, the free end LF extension distance LE1 of a flexible rope is twice the distance of the movable pulley moving distance LD1, in the present application, the movable pulley (namely, the first movable pulley 7 and the second movable pulley 8) moving distance LD3 of the flexible rope hard connection combination with the movable pulley is changed into the same length by the relative sliding of the first movable part 5 and the first fixed part body 6, in the movable pulley system which is matched and connected with the second movable part 9 and the second fixed part body 10, the free end RF retraction distance RE1 of the first flexible rope 3 is the same length relation of the movable pulley block movement distance RD1, the free ends LF, RF of the first flexible rope 3 which are connected with the first lifting mechanism 1 and the second lifting mechanism 2 are exactly extended and retracted one by one, and the extension and retraction values of the first lifting mechanism 1 and the second lifting mechanism 2 are exactly equal, so that when the free ends LF, RF of the flexible rope are overlapped and connected, a single movable pulley block formed by combining the first movable pulley 7, the second movable pulley 8 and the third movable pulley 11 is matched with the first cross beam 12 or the table top 13 by the single movable pulley block, the first flexible rope, the two parallel first lifting mechanisms 1 and the second lifting mechanism 2, and a driving device 4 is matched to solve the synchronous lifting and folding problem of the lifting and folding mechanism.

As shown in fig. 1, the first movable member 5 moves upward and has only the lower end provided with the second movable pulley 8, the first flexible wires 3 on both sides of the single second movable pulley 8 are parallel to each other and to the sliding direction of the first movable member 5, the free end LF of the first flexible wire 3 moves in an elongated manner and the movement displacement LE1 is twice as much as the movement displacement LD1 of the second movable pulley 8, and the directions are the same, namely

LE1=2*LD1

As shown in fig. 2, only a single first movable pulley 7 is mounted on the top end of the first movable member 5, the first flexible wires 3 on both sides of the single first movable pulley 7 are not parallel, only one side of the first flexible wires 3 is parallel to the moving direction of the first movable member 5, the free end LF of the other side of the first flexible wires 3 slides in the direction of an included angle BL with the horizontal direction, the free end LF of the first flexible wires 3 contracts and moves towards the direction of the first movable pulley 7, and the contracted displacement LE2 has the same value as the displacement LD2 of the upward movement of the first movable pulley 7, and because the first movable pulley 7 moves upward and the free end LF of the first flexible wires 3 contracts:

LE2=-LD2

as shown in fig. 3, the first movable pulley 7, the second movable pulley 8, the first movable member 5 and the first flexible cable 3 are combined together, the first movable member 5 is provided with the first movable pulley 7 and the second movable pulley 8 at the top end and the bottom end of the first movable member 5 respectively to form a hard-connected movable pulley block and parallel to the sliding direction of the first movable member 5, at this time, the movement displacement of the first flexible cable 3 is LE3, the upward movement displacement of the movable pulley block formed by the first movable pulley 7, the second movable pulley 8 and the first movable member 5 is LD3, at this time

LE3=LE1+LE2

As a result of: l1=2xld1

LE2=-LD2

So that: l3=2ld1+ (-LD 2)

When the movement locus of the first movable member 5 in fig. 1, 2 and 3 is the same, the displacement amount of the second movable sheave 8 is the same,

namely: ld1=ld2=ld3

So that: l3=2ld3+ (-LD 3)

Then: l3=ld3

Therefore, the displacement LE3 of the first flexible cable 3 of the hard-connected movable pulley group in the extended movement is the same as the movable pulley displacement LD3 of the hard-connected movable pulley group.

As shown in fig. 4, the second movable part 9 moves upward, and only a third movable pulley 11 is mounted on the top end of the second movable part, the first flexible wires 3 on both sides of the single third movable pulley 11 are non-parallel, and only the first flexible wire 3 on one side is parallel to the sliding direction of the second movable part 9, the free end of the first flexible wire 3 on the other side slides in the direction of an included angle BR with the horizontal direction, at this time, the displacement amount RE1 of the shrinkage and contraction movement of the free end RF of the first flexible wire 3 is the same as the displacement amount RD1 of the third movable pulley 11, because the third movable pulley 11 moves upward, and the first flexible wire 3 shrinks

RE1=-RD1

Overlapping and connecting the free ends LF and RF of the first flexible cord 3 and tensioning the first flexible cord 3, i.e

When ie3+re 1=0

The method comprises the following steps: ld3+ (-RD 1) =0

Then: ld3=rd1

Therefore, at this time, the first movable member 5 and the second movable member 9 are displaced by the same value and in the same direction.

As shown in fig. 5, 6 and 7, the free ends LF and RF of the first flexible cable 3 are overlapped and connected and the first flexible cable 3 is tensioned, at this time, the hard-connected movable pulley group formed by the first movable pulley 7 and the second movable pulley 8 on the first movable member 5 and the third movable pulley 11 on the second movable member 9 form a hard-connected movable pulley group, that is, the first movable pulley 7, the second movable pulley 8 and the third movable pulley 11 form a large single movable pulley group, at this time, the first movable member 5 forms a synchronous lifting frame together by using the first beam 12 or the panel 13 alone and connecting the second movable member 9 with the first beam 12 or the panel 13, the first movable member 5 is in sliding fit with the first fixed member body 6, the second movable part 9 is in sliding fit with the second fixed part body 10, one end of a first flexible rope 3 is fixed on the first fixed part and then connected with a first movable pulley 7 and a second movable pulley 8 on the first movable part 5, and after being connected with a third movable pulley 11 on the second movable part 9, the second flexible rope is fixed on the second fixed part body 10, and a single driving device 4 is kept in supporting and rigid fixed connection with the synchronous lifting frame and the second fixed part, and the driving device 4 drives the displacement value E1 of the first movable part 5 to be equal to the displacement value E2 of the second movable part 9 and the displacement direction is the same, so that a synchronous lifting folding mechanism capable of synchronously lifting is formed.

As shown in fig. 12 and 13, in this embodiment, the first movable member 5 is sleeved on the first fixed member body 6 and keeps the first movable member and the second movable member 5 relatively slidable, the second movable member 9 is sleeved on the second fixed member body 10 and keeps the second movable member and the second movable member 9 relatively slidable, the first movable member 5 and the second movable member 9 have the same structure, the first movable member 5 is described as an example, the first movable member 5 includes an inner movable member body 5-1 and an outer movable member body 5-2, the inner movable member body 5-1 extends into the first fixed member body 6 from the top of the first fixed member body 6, the outer movable member body 5-2 is sleeved outside the first fixed member body 6, the first movable pulley 7 and the second movable pulley 8 are respectively mounted on the inner movable member body 5-1, and the rotating shaft of the first movable pulley 7 passes through the inner movable member body 5-1 to be connected with the outer movable member body 5-2, and the rotating shaft of the second movable pulley 8 is only connected with the inner movable member body 5-1 and is not in contact with the first fixed member body 6, and the inner movable member 5-1 is made of the best embodiment.

Example 2

In this embodiment, as compared with embodiment 1, as shown in fig. 14 to 16, a third lifting mechanism 14 and a second flexible cable 15 are further provided, wherein the third lifting mechanism 14 comprises a third movable part 16 and a third fixed part, the third fixed part in this embodiment comprises a third fixed part body 17 and a third supporting plate, the bottom end of the third fixed part body 17 is fixedly connected with the third supporting plate and is in an inverted T shape, the third movable part 16 is arranged on the third fixed part body 17 and can slide on the third movable part 16, the shape and the height of the third movable part 16 in this embodiment are the same as those of the second movable part 9, the shape and the height of the third fixed part body 17 are the same as those of the second fixed part body 10, the third movable part 16 is also slidably mounted with the third fixed part body 17 by adopting a sliding guide assembly 23, the upper part and the lower part of the third movable part 16 are respectively rotatably provided with a fourth movable pulley 18 and a fifth movable pulley 19, the fourth movable pulley 18 and the fifth movable pulley 19 are optimally mounted at the top end and the bottom end of the third movable part 16 respectively, the upper part of the first movable part 5 or the second movable part 9 is rotatably provided with a sixth movable pulley 20, the top end of the third movable part 16 is connected with the table top 13 in a use state or is connected with the first movable part 5 or the second movable part 9 by adopting a second cross beam 21, one end of the second flexible cable 15 is fixedly connected with the third fixed part above the fifth movable pulley 19, the other end of the second flexible cable 15 sequentially bypasses the fifth movable pulley 19, the fourth movable pulley 18 and the sixth movable pulley 20 and then is fixedly connected with the first fixed part or the second fixed part, and the second flexible cord 15 is in tension to raise and lower the third movable member 16 in synchronization with the first movable member 5 and the second movable member 9. The first movable member 5, the first fixed member body 6, the second movable member 9, the second fixed member body 10, the third movable member 16, and the third fixed member body 17 in this embodiment each adopt a tubular structure having a triangular cross section.

In the present embodiment, the sixth movable pulley 20 is rotatably mounted on the top end of the first movable member 5, and in order to facilitate the mounting of the sixth movable pulley 20 and the first movable pulley 7 on the first movable member 5, in the present embodiment, a pulley mounting seat 22 is mounted on the upper portion of the first movable member 5, and the pulley mounting seat 22 moves synchronously with the movement of the first movable member 5, and the first movable pulley 7 and the sixth movable pulley 20 are both rotatably mounted on the pulley mounting seat 22 by using a rotation shaft, and accordingly, the second movable pulley 8, the third movable pulley 11, the fourth movable pulley 18 and the fifth movable pulley 19 in the present embodiment are respectively mounted by using corresponding pulley mounting seats.

In the embodiment, when the first movable part 5 moves upwards, the second flexible rope 15 pulls the third movable part 16 to move upwards on the third fixed part body 17 by the same distance as the upward movement of the first movable part 5, so that the first movable part 5, the second movable part 9 and the third movable part 16 synchronously move downwards; when the first movable part 5 moves downwards, the second flexible rope 15 transmits power to the fourth movable pulley 18 and the fifth movable pulley 19 to drive the second cross beam 21 or the table top 13 and the third movable part 16 to synchronously descend, so that the first lifting mechanism 1, the second lifting mechanism 2 and the third lifting mechanism 14 synchronously descend.

In this embodiment, the first lifting mechanism 1, the second lifting mechanism 2 and the third lifting mechanism 14 may be in a linear distribution or a triangular distribution, and the structure of the rest of the embodiments is the same as that of embodiment 1, and specific reference may be made to embodiment 1, which is not repeated.

Example 3

Compared with the embodiment 2, the embodiment is further improved, and is further provided with more than one fourth lifting mechanism (not shown in the figure) and third flexible wires (not shown in the figure) with the same number as the fourth lifting mechanism, wherein the fourth lifting mechanism comprises a fourth movable part (not shown in the figure) and a fourth fixed part (not shown in the figure), the fourth fixed part in the embodiment comprises a fourth fixed part body and a fourth supporting plate, the bottom end of the fourth fixed part body is fixedly connected with the fourth supporting plate to form an inverted T shape, the fourth movable part is slidably arranged on the fourth fixed part body, a seventh movable pulley (not shown in the figure) and an eighth movable pulley (not shown in the figure) are respectively rotatably arranged on the upper part and the lower part of the fourth movable part, a ninth movable pulley (not shown in the figure) is rotatably arranged at the upper part of the first movable part 5 or the second movable part 9 or the third movable part 16, the top of the fourth movable part is connected with the table top 13 in a use state, or a third cross beam (not shown in the figure) is adopted to connect the first movable part 5 or the second movable part 9 or the third movable part 16, one end of a third flexible rope is fixedly connected with the fourth fixed part above the eighth movable pulley, the other end of the third flexible rope sequentially bypasses the eighth movable pulley, the seventh movable pulley and the ninth movable pulley and is fixedly connected with the first fixed part or the second fixed part or the third fixed part, the third flexible rope is in a tensioning state, so that the fourth movable part and the first movable part 5, the second movable part 9 and the third movable part 16 are synchronously lifted, the fourth elevating mechanism in the present embodiment has the same structure as the first elevating mechanism 1.

In this embodiment, the number of the fourth lifting mechanisms may be one or more, when the number of the fourth lifting mechanisms is one, one end of the third flexible cable far from the fourth lifting mechanism may be fixedly connected with any one of the first fixing member or the second fixing member or the third fixing member, and when the number of the fourth lifting mechanisms is two or more, one end of the third flexible cable is fixedly connected with the fourth fixing member portion, the other end of the third flexible cable is fixedly connected with the first fixing member or the second fixing member or the third fixing member, while one end of the remaining third flexible cable is fixedly connected with the fourth fixing member portion, the other end of the remaining third flexible cable may be connected with the fourth fixing member in addition to the first fixing member or the second fixing member or the third fixing member, and all of the fourth lifting mechanisms are lifted synchronously with the first lifting mechanism 1, the second lifting mechanism 2 and the third lifting mechanism 14 through power transmission of the fourth flexible cable. The first lifting mechanism 1, the second lifting mechanism 2, the third lifting mechanism 14 and the fourth lifting mechanism in this embodiment may be arranged along a line, may be arranged along a triangle, may be arranged along a polygon, or may be arranged along other irregular shapes, and in this embodiment, a suitable number of fourth lifting mechanisms may be set according to the size of the table top 13 to be supported in the use state, and the arrangement modes of the first lifting mechanism 1, the second lifting mechanism 2, the third lifting mechanism 14 and the fourth lifting mechanism may be set according to the shape of the supported table top 13. The structure of the rest of the embodiments is the same as that of embodiment 2, and specific reference may be made to embodiment 2, which is not repeated.

Example 4

In this embodiment, compared with the foregoing embodiments, the first fixing member in this embodiment further includes the first fixing rod 24 for facilitating the fixing connection between the first flexible cable 3 and the first fixing member, the first fixing rod 24 extends into the first movable member 5, the bottom end of the first fixing rod 24 is fixedly connected with the first support plate 27, and the top end of the first fixing rod 24 is higher than the second movable pulley 8, the end of the first flexible cable 3 is fixedly connected with the upper portion of the first fixing rod 24, so as to achieve the fixing connection between the first flexible cable 3 and the first fixing member, for example, the end of the first flexible cable 3 is welded and fixed with the top end of the first fixing rod 24, the fixing member is pressed and fixed by a bolt, the fixing member is fixed by a pin, the fixing member is riveted, the third fixing rod 29 and the fourth fixing member are fixedly connected with the first support plate 27, the third fixing member body and the fourth fixing member body are fixedly correspondingly fixed with the third fixing rod 29 and the fourth fixing member body in this embodiment, and the bottom end of the fourth fixing member is not shown in this embodiment, and the third fixing member is fixedly connected with the third fixing rod 29 and the fourth fixing member is fixedly connected with the bottom end of the third flexible cable 29. The first fixing rod 24, the third fixing rod 29 and the fourth fixing rod in this embodiment are all made of metal profiles, metal bars or metal pipes, such as angle steel, channel steel, square steel, etc., or metal bars or metal pipes. The structures of the rest of the present embodiment and the foregoing embodiment 1, embodiment 2 or embodiment 3 may be specifically referred to embodiment 1, embodiment 2 or embodiment 3, and this embodiment is not repeated.

Example 5

In this embodiment, compared with embodiment 4, the first lifting mechanism 1, the second lifting mechanism 2, the third lifting mechanism 14 and all the fourth lifting mechanisms are parallel and have an included angle with the vertical direction in this embodiment, as shown in fig. 17 and 18. The structure of the rest of the present embodiment is the same as that of embodiment 4, and specific reference may be made to embodiment 4, which is not repeated.

Example 6

The solution of this embodiment is a piece of furniture, including any one of embodiments 1 to 5, the table top 13 of the piece of furniture is fixedly connected to the top of the single power source lifting folding mechanism, the lifting of the single power source lifting folding mechanism is used to adjust the height of the table top 13 of the piece of furniture, the piece of furniture of this embodiment may be a table, the table top 13 is a table top, the transverse shape of the table top 13 in this embodiment may be triangle, quadrangle or other polygonal shapes, or may be a shape such as a circular shape, an oval L shape with an edge protruding outwards, or a quincuncial shape with an edge slightly concave inwards, etc., and the legs of the lifting mechanism are arranged according to the shape of the table top 13, so as to keep the first flexible cable 3, the second flexible cable 15 and the third flexible cable all located below the table top 13.

Example 7

The solution of this embodiment is a piece of furniture, including the single power source lifting folding mechanism in embodiment 6, and this single power source lifting folding mechanism includes third elevating mechanism 14 and at least one fourth elevating mechanism, this embodiment still uses the desk to describe as an example, wherein mesa 13 is the desktop, and the shape of desktop is the irregular shape that the limit is inwards concave in the border, such as the desktop of U shape, etc., mesa 13 and the top fixed connection of single power source lifting folding mechanism of furniture, the lift of single power source lifting folding mechanism is used for adjusting the height of furniture mesa 13, this embodiment adopts the axis of rotation to install more than one fixed pulley (not shown in the figure) in the position that the bottom of mesa 13 is located the concave limit, first flexible cable 3 and/or second flexible cable 15 and/or third flexible cable bypass the fixed pulley, make first flexible cable 3 and/or second flexible cable 15 and/or third flexible cable all be located the below mesa 13.

All parts not specifically described in the above description are prior art or can be realized by prior art. Moreover, the embodiments of the present utility model are described in the preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model. Equivalent changes and modifications of the utility model are to be considered as technical scope of the present utility model.

Claims (10)

1. A single power source goes up and down folding mechanism which characterized in that: including first elevating system (1), second elevating system (2), first flexible cable (3) and drive arrangement (4), first elevating system (1) is including first movable part (5) and first fixed part, first movable part (5) are installed on first fixed part and constitute the revolute with first fixed part, first movable pulley (7) and second movable pulley (8) are installed respectively to upper portion and the lower part of first movable part (5), second elevating system (2) are including second movable part (9) and second fixed part, second movable part (9) slidable mounting is on second fixed part, third movable pulley (11) are installed on the upper portion of second movable part (9), the one end and the first fixed part fixed connection of first flexible cable (3), the other end of first flexible cable (3) is walked around second movable pulley (8), first movable pulley (7) and third movable pulley (11) back and second fixed part fixed connection, drive arrangement (4) are installed on second fixed part, direct tensioning device (4) is held up against first flexible cable (11) and is held up to tensioning device.

2. The single power source lift folding mechanism of claim 1, wherein: the lifting device comprises a first lifting mechanism (14) and a second flexible rope (15), wherein the first lifting mechanism (14) comprises a first movable part (16) and a first fixed part, the first movable part (16) is arranged on the first fixed part, the first movable part (16) can slide on the first movable part (16), a first movable pulley (18) and a first movable pulley (19) are respectively arranged on the upper part and the lower part of the first movable part (16), a second movable pulley (20) is rotatably arranged on the upper part of the first movable part (5) or the second movable part (9), one end of the second flexible rope (15) is fixedly connected with the first fixed part, the other end of the second flexible rope (15) bypasses the first movable pulley (19), the first movable pulley (18) and the second movable pulley (20) and then is fixedly connected with the first fixed part or the second fixed part, and the second flexible rope (15) is in a tensioning state.

3. The single power source lift folding mechanism of claim 2, wherein: a pulley mounting seat (22) is mounted on the upper portion of the first movable part (5), the pulley mounting seat (22) moves synchronously along with the movement of the first movable part (5), and the first movable pulley (7) and the sixth movable pulley (20) are mounted on the pulley mounting seat (22).

4. The single power source lift folding mechanism of claim 2, wherein: the lifting mechanism comprises a first movable part, a second movable part (9) and a third movable part (16), wherein the first movable part is fixedly connected with the first movable part, the second movable part (9) is fixedly connected with the second movable part, the third movable part (16) is fixedly connected with the fourth movable part, and the third flexible rope is in a tensioning state to enable the first movable part, the second movable part (5), the third movable part (9) and the third movable part (16) to synchronously lift.

5. The single power source lift folding mechanism of claim 1, wherein: the first movable part (5) and the first fixed part are tubular, the first fixed part is sleeved on the first movable part (5), and a sliding guide assembly (23) is arranged on the first movable part (5) and used for guiding the sliding of the first movable part (5) in the first fixed part.

6. The single power source lift folding mechanism of claim 5, wherein: the first fixed part comprises a first fixed part body and a first fixed rod (24), the first movable part (5) is slidably mounted with the first fixed part body, the first fixed rod (24) stretches into the first movable part (5), the top end of the first fixed rod (24) is higher than the second movable pulley (8), and the end of the first flexible rope (3) is fixedly connected with the upper portion of the first fixed rod (24).

7. The single power source lift folding mechanism of claim 6, wherein: the first fixing rod (24) is made of metal section bars or pipes.

8. The single power source lift folding mechanism of claim 1, wherein: the first lifting mechanism (1) and the second lifting mechanism (2) are parallel and have an included angle with the vertical direction.

9. A piece of furniture, characterized in that: comprising the single power source lifting folding mechanism as claimed in any one of claims 1 to 8, wherein the table top (13) of the furniture is fixedly connected with the top of the single power source lifting folding mechanism, and the lifting of the single power source lifting folding mechanism is used for adjusting the height of the furniture table top (13).

10. The piece of furniture according to claim 9, characterized in that: more than one fixed pulley is arranged at the bottom of the table top (13), and the first flexible rope (3) and/or the second flexible rope (15) and/or the third flexible rope bypass the fixed pulleys, so that the first flexible rope (3) and/or the second flexible rope (15) and/or the third flexible rope are all positioned below the table top (13).