Z-shaped transmission lifting bed

Abstract

The utility model belongs to the technical field of lifting beds, and particularly relates to a Z-shaped transmission lifting bed which comprises a rectangular bed frame, lifting legs are arranged at corners of the lower portion of the bed frame, a gear box is arranged above the lifting legs, the lifting legs comprise driving lifting legs and driven lifting legs, and the driving lifting legs and the driven lifting legs are arranged on the gear box. The two driving lifting legs are arranged at the opposite angles of the lower portion of the bed frame, the two driven lifting legs are arranged at the opposite angles of the other side of the lower portion of the bed frame, transmission rods are arranged between the adjacent driving lifting legs and the driven lifting legs, and the driving lifting legs are driven by a driving device. The lifting device is reasonable in design, simple in structure and convenient to machine, and by means of matching of the tensioning device, the auxiliary wheel and the driving belt wheel, uniform distribution of lifting driving power is achieved, the transmission effect is improved, the possibility of height errors is reduced, and the use requirement is effectively met.

Description

Technical Field

[0001] The utility model belongs to the technical field of lifting beds, and in particular relates to a Z-type transmission lifting bed. Background Art

[0002] The height of the bed of the lift bed can be adjusted as needed, and the space under the lift bed can be reasonably utilized, further improving the utilization rate of the indoor space.

[0003] However, in the prior art, when the lifting bed is driven by a single motor for lifting, the power distribution is uneven. For example, there are four lifting legs at the bottom of the lifting bed, and two lifting legs on the same side are directly driven by the same motor. The two lifting legs are marked as active lifting legs, and then the active lifting legs drive the two lifting legs on the other side (driven lifting legs) to work. Since the power transmission is attenuated and the driven lifting legs are located on the same side, height errors are easily generated during the height adjustment process, affecting usage requirements. Utility Model Content

[0004] In view of the above-mentioned technical problems, the utility model proposes a Z-type transmission lifting bed which has a reasonable design, a simple structure, is easy to process and can achieve uniform distribution of lifting driving power, improve transmission effect, reduce the possibility of height error, and effectively meet the use requirements.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is a Z-type transmission lifting bed, including a bed frame designed in a rectangular shape, lifting legs are arranged at the lower corners of the bed frame, a gear box is arranged above the lifting legs, the lifting legs include an active lifting leg and a driven lifting leg, two of the active lifting legs are set at the diagonals below the bed frame, and two of the driven lifting legs are set at the other diagonals below the bed frame, a transmission rod is arranged between adjacent active lifting legs and driven lifting legs, and a driving device is arranged at the geometric center of the bed frame and is connected to the active lifting leg.

[0006] Preferably, the driving device comprises a transmission belt connecting two active lifting legs for driving them to lift, retract and extend, a driving pulley is arranged on the inner side of the transmission belt, and a driving motor is arranged below the driving pulley.

[0007] Preferably, an extension rod is coaxially arranged at the upper end of the screw rod in the active lifting leg, and the upper end of the extension rod extends to the upper end of the gear box on the active lifting leg and is coaxially connected with the driven pulley.

[0008] Preferably, both ends of the transmission rod are respectively connected to the gear boxes on the active lifting leg and the driven lifting leg.

[0009] Preferably, a worm gear reduction box is provided at the output end of the driving motor, and the output end of the worm gear reduction box is drivingly connected to the driving pulley.

[0010] Preferably, a tensioning device is provided on one side of the transmission belt.

[0011] Preferably, the tensioning device comprises a tensioning wheel for tensioning the transmission belt.

[0012] Preferably, the tensioning device comprises a base, on which a slider is provided and connected to a tensioning wheel, and the tensioning wheel can move along a tangent direction of the driving pulley, and the tangent direction forms an acute angle with the direction of the transmission belt.

[0013] Preferably, the base is set up above the worm gear reducer, and a slide groove for accommodating the movement of the slider is opened in the base. A threaded rod is also arranged in the base corresponding to the slide groove and connected to the slider.

[0014] Preferably, an auxiliary wheel is provided on the other side of the driving pulley, and the auxiliary wheel is arranged above the worm gear reduction box and on one side close to the transmission belt.

[0015] Compared with the prior art, the advantages and positive effects of the utility model are:

[0016] 1. The utility model provides a Z-type transmission lifting bed, which arranges two sets of active lifting legs and driven lifting legs connected with each other in a centrally symmetrical manner. A triangular structure can be formed between the two active lifting legs and any driven lifting leg, so that the driving force and the load-bearing force are more evenly distributed and the synchronization is better. At the same time, a tensioning wheel is adopted, and the moving trajectory of the tensioning wheel is along the tangent direction of the active belt pulley and forms an acute angle with the direction of the transmission belt. While the transmission belt is tensioned, the wrapping of the transmission belt on the active belt pulley is further increased. By setting an auxiliary wheel, the wrapping area of ​​the transmission belt and the active belt pulley is further increased, and the transmission effect is improved. The utility model solves the problem of uneven power distribution when the lifting bed in the prior art adopts a single motor for lifting drive; the device has a reasonable design, a simple structure, and is easy to process, and can achieve uniform distribution of lifting drive power, improve the transmission effect, reduce the possibility of height error, and effectively meet the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0018] Figure 1 It is a schematic diagram of the structure of the utility model in an embodiment;

[0019] Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0020] Figure 3 An exploded view of the tensioning device in an embodiment of the utility model;

[0021] Figure 4 This is an exploded view of the structure of the gear box of the active lifting leg in the embodiment of the utility model;

[0022] In the above figures, 1-bed guard; 2-bed frame; 3-active lifting leg; 4-driven pulley; 5-transmission belt; 6-transmission rod; 7-crossbeam; 8-drive motor; 9-active pulley; 10-table top; 11-auxiliary wheel; 12-tensioning wheel; 13-slider; 14-threaded rod; 15-base; 16-slide; 17-extension rod; 18-worm gear reducer; 19-active lifting leg. DETAILED DESCRIPTION

[0023] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0025] Examples, such as Figures 1 to 4 As shown, a Z-type transmission lifting bed includes a bed frame 2 with a rectangular design, and lifting legs are respectively arranged on the four corners of the bed frame 2. A gear box is arranged above the lifting legs. There are four lifting legs in total, including an active lifting leg 3 and a driven lifting leg 19. Among them, for the selected active lifting leg 3 and the driven lifting leg 19, the specific lifting action is realized by means of a screw rod structure established inside to ensure that, further, the two active lifting legs 3 are respectively arranged at the diagonal positions of the bed frame 2, each active lifting leg 3 is respectively connected to the driven lifting leg 19 through a transmission rod 6, and the two active lifting legs 3 are driven by a driving device.

[0026] In order to effectively ensure that the driving power is transmitted toward the lifting legs, the driving device includes a transmission belt 5 connecting the two active lifting legs 3 for driving them to lift, retract and extend. A driving pulley 9 is arranged on the inner side of the transmission belt 5, and a driving motor 8 is arranged below the driving pulley 9. That is to say, the transmission belt 5 is used to drive the active lifting legs 3 to retract and extend. The transmission belt 5 is driven by the driving pulley 9. The transmission belt 5 drives the active lifting legs 3 through the driven pulley 4, and the driving motor 8 provides driving power for the driving pulley 9.

[0027] In order to further improve the rationality of the establishment of the device, the active lifting leg 3 and the driven lifting leg 19 both use existing screw lifting legs. The upper end of the screw on the active lifting leg 3 is coaxially fixed with an extension rod 17. The upper end of the extension rod 17 extends to the upper end of the gear box on the active lifting leg 3 and is coaxially fixed to the driven pulley 4. A hole is opened at the upper end of the gear box to accommodate the rotation of the extension rod 17, and the driven pulley 4 rotates the active lifting leg 3 to retract and retract.

[0028] In order to ensure the effective transmission of power, the two ends of the transmission rod 6 are respectively connected to the gear boxes on the active lifting leg 3 and the driven lifting leg 19, and the active lifting leg 3 drives the matching driven lifting leg 19 to extend and retract through the transmission rod 6.

[0029] In order to ensure effective input of driving power, the driving pulley 9 is driven by a driving motor 8, and the driving motor 8 is fixedly mounted on the crossbeam 7, and the crossbeam 7 is fixedly mounted on the inner side of the bed frame 2 near the middle.

[0030] In order to facilitate the control of input power, the output end of the drive motor 8 is connected to a worm gear reduction box 18, and the output end of the worm gear reduction box 18 is transmission-connected to the driving pulley 9. The drive motor 8 drives the driving pulley 9 to rotate through the worm gear reduction box 18.

[0031] In order to ensure convenience during power transmission and effectively improve the lifting and lowering smoothness of the lifting legs, a tensioning device is connected to the transmission belt 5, and the tensioning device is arranged on the worm gear reduction box 18 near the side of the driving pulley 9.

[0032] In order to improve the rationality of the device, the tensioning device includes a tensioning wheel 12 for tensioning the drive belt 5. The tensioning wheel 12 can move along the tangential direction of the driving pulley 9, and the tangential direction forms an acute angle with the direction of the drive belt 5.

[0033] In order to effectively adjust the position of the tensioning wheel 12 , the tensioning wheel 12 is driven to move by the slider 13 , the tensioning wheel 12 is rotatably mounted on the slider 13 , and the axis of the tensioning wheel 12 is parallel to the axis of the driving pulley 9 .

[0034] In order to fully ensure the rationality of the device and equipment so as to give full play to its function, the slider 13 is slidably installed on the base 15, and a slide groove 16 for accommodating the movement of the slider 13 is opened on the base 15. A threaded rod 14 that passes through both ends of the slide groove 16 and is used to drive the slider 13 to move is rotatably installed on the base 15. The slider 13 is provided with a thread or a threaded hole used in conjunction with the threaded rod 14. One end of the threaded rod 14 passes through one end of the base 15 and is provided with a structure such as a square or a cross groove that facilitates its own active rotation. Rotating the threaded rod 14 drives the slider 13 to move, thereby realizing the movement of the tensioning wheel 12.

[0035] Furthermore, an auxiliary wheel 11 is provided on the other side of the driving pulley 9. The auxiliary wheel 11 is rotatably mounted on the worm gear reduction box 18 near one side of the transmission belt 5, so as to further improve the wrapping of the transmission belt 5 and the driving pulley 9 and ensure the effective output of power.

[0036] In addition, a bed board and a bed guard 1 are also provided on the bed frame 2, and an outer cover can be provided on the outside of the transmission rod 6 and the transmission belt 5 as needed. Furthermore, a synchronous lifting table board 10 is provided at a certain distance below the bed frame 2, and an adjustable inclined movable table top is provided on the table board 10. A bookshelf, a storage cabinet or a storage compartment is provided near one side between the table board 10 and the bed frame 2.

[0037] When in use, the driving motor 8 drives the active pulley 9 to rotate, and then drives the two driven pulleys 4 to rotate through the transmission belt 5, thereby driving the active lifting leg 3 to extend and retract, and at the same time drives the driven lifting leg 19 to extend and retract, thereby achieving height adjustment of the table top 10 and the table frame.

[0038] In the above process: the utility model arranges two groups of active lifting legs 3 and driven lifting legs 19 that are connected by matching transmission in a central symmetrical manner, and a triangular structure can be formed between the two active lifting legs 3 and any driven lifting leg 19, so that the driving force and the load-bearing force are more evenly distributed and the synchronization is better. At the same time, a tensioning wheel 12 is used, and the moving trajectory of the tensioning wheel 12 is along the tangent direction of the active pulley 9 and forms an acute angle with the direction of the transmission belt 5. While the transmission belt 5 is tensioned, the wrapping of the transmission belt 5 on the active pulley 9 is further increased. By setting an auxiliary wheel 11, the wrapping area of ​​the transmission belt 5 and the active pulley 9 is further increased, thereby improving the transmission effect. The utility model solves the problem of uneven power distribution when the lifting bed in the prior art is driven by a single motor for lifting; the device has a reasonable design, a simple structure, and is easy to process, and can achieve uniform distribution of lifting drive power, improve the transmission effect, reduce the possibility of height error, and effectively meet the use requirements.

[0039] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A Z-type transmission lifting bed, comprising a bed frame designed in a rectangular shape, wherein lifting legs are arranged at the lower corners of the bed frame, and a gear box is arranged above the lifting legs, characterized in that: The lifting legs include an active lifting leg and a driven lifting leg. The two active lifting legs are set at the diagonals below the bed frame, and the two driven lifting legs are set at the other diagonals below the bed frame. A transmission rod is arranged between adjacent active lifting legs and driven lifting legs, and the active lifting legs are driven by a driving device.

2. A Z-type transmission lifting bed according to claim 1, characterized in that: The driving device comprises a transmission belt connecting two active lifting legs for driving the two active lifting legs to lift, retract and extend. A driving pulley is arranged on the inner side of the transmission belt, and a driving motor is arranged below the driving pulley.

3. A Z-type transmission lifting bed according to claim 2, characterized in that: An extension rod is coaxially arranged at the upper end of the screw rod in the active lifting leg, and the upper end of the extension rod extends to the upper end of the gear box on the active lifting leg and is coaxially connected with the driven pulley.

4. A Z-type transmission lifting bed according to claim 3, characterized in that: The two ends of the transmission rod are respectively connected to the gear boxes on the active lifting leg and the driven lifting leg.

5. A Z-type transmission lifting bed according to any one of claims 2-4, characterized in that: The output end of the driving motor is provided with a worm gear reduction box, and the output end of the worm gear reduction box is drivingly connected to the driving pulley.

6. A Z-type transmission lifting bed according to claim 5, characterized in that: A tensioning device is arranged on one side of the transmission belt.

7. A Z-type transmission lifting bed according to claim 6, characterized in that: The tensioning device comprises a tensioning wheel for tensioning the transmission belt.

8. A Z-type transmission lifting bed according to claim 7, characterized in that: The tensioning device comprises a base, on which a slider is arranged and connected to a tensioning wheel. The tensioning wheel can move along the tangent direction of the driving pulley, and the tangent direction forms an acute angle with the direction of the transmission belt.

9. A Z-type transmission lifting bed according to claim 8, characterized in that: The base is set up above the worm gear reducer, and a slide groove for accommodating the movement of the slider is opened in the base. A threaded rod is also arranged in the base corresponding to the slide groove and connected to the slider.

10. A Z-type transmission lifting bed according to claim 9, characterized in that: An auxiliary wheel is arranged on the other side of the driving pulley, and the auxiliary wheel is arranged above the worm gear reduction box and on one side close to the transmission belt.

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