Electric bed with quick adjustment of the steel wire rope

Abstract

A kind of electric bed of quick adjustable steel wire rope, it relates to electric bed field, including bed frame, bed plate, turnover mechanism, drive mechanism and adjusting mechanism, turnover mechanism is provided with two, respectively located the front and rear sides of bed plate, including the steel wire rope of driving bed plate turnover, drive mechanism drives steel wire rope to drive bed plate turnover;Adjusting mechanism is one to one with turnover mechanism, including cam, adjusting bolt, adjusting nut and connecting piece, cam is rotatably arranged in bed frame, one end of steel wire rope extends around pulley block and is set on cam;Adjusting bolt passes through bed frame and cam and is threadedly connected with adjusting nut;Connecting piece is arranged between cam and adjusting bolt so that cam can rotate with the rotation of adjusting bolt to fine tune steel wire rope.When two sides steel wire rope occurs different degree of stretching and needs to be adjusted, only need to control cam rotation in tensioned state, adjusting to the rotation connecting rod angle of two sides is consistent, i.e. electric bed can be quickly completed adjustment, high efficiency and fast, with very high practicality.

Description

Technical Field

[0001] This utility model belongs to the field of electric beds, specifically an electric bed with a quickly adjustable steel wire rope. Background Technology

[0002] As people's living standards gradually improve, their attention to sleep quality is increasing. Consequently, electric beds driven by devices such as electric motors have developed rapidly. Currently, there is a single-motor driven wire rope transmission device that uses a single motor to tighten bidirectional wire ropes to control the bed board's rotation. However, due to varying stress conditions on different parts of the bed board in daily life, the loads on the wire ropes at both ends of the electric bed are also different. After prolonged use, the wire ropes will inevitably stretch to some extent. This uneven stress can easily lead to different stretches in the wire ropes on both sides, resulting in different angles on both sides when the wire ropes are tightened to the same length to rotate the bed board. This affects the normal use of the electric bed and needs improvement. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an electric bed with a quickly adjustable wire rope.

[0004] The present invention adopts the following technical solution:

[0005] An electric bed with a quickly adjustable steel wire rope includes a bed frame, a bed board that can be flipped on the bed frame, a flipping mechanism, a drive mechanism, and an adjustment mechanism. Two flipping mechanisms are provided, located on the front and rear sides of the bed board respectively. Each mechanism includes a rotating link, a pulley system, and a steel wire rope. The rotating link is rotatably mounted on the bed frame and contacts the bed board, causing the bed board to flip as the flipping mechanism operates. One end of the steel wire rope extends around the pulley system and is fixed to the bed frame. The drive mechanism is connected to the other ends of the two steel wire ropes, driving the rotating link to rotate so that the two flipping links rotate synchronously. The adjustment mechanism corresponds to the flipping mechanism and includes a cam, an adjusting bolt, an adjusting nut, and a connector. The cam is rotatably mounted in the bed frame, and one end of the steel wire rope extends around the pulley system and is sleeved on the cam. The adjusting bolt passes through the bed frame and the cam and is threadedly connected to the adjusting nut. The connector is located between the cam and the adjusting bolt, allowing the cam to rotate with the adjusting bolt, thereby fine-tuning the steel wire rope.

[0006] Preferably, the cam has a shaft hole through which the adjusting bolt passes, and the connecting member includes a first keyway, a second keyway and a key block. The first keyway is formed on the side of the adjusting bolt and extends along the length of the adjusting bolt. The second keyway is formed on the protrusion in a direction parallel to the axial direction of the shaft hole and communicates with the shaft hole. The key block is disposed between the first keyway and the second keyway so that the cam rotates with the adjusting bolt.

[0007] Preferably, the bed frame includes two longitudinal tubes arranged along the length of the bed board and two transverse tubes formed along the width of the bed board. The drive mechanism is arranged in one longitudinal tube, and the flipping mechanism is arranged in the two transverse tubes respectively. Mounting plates are formed with upward protrusions on both sides of the transverse tubes. The mounting plates are formed with clearance holes for the adjusting bolts to pass through, and the clearance holes are recessed outward to form clearance grooves for the key blocks to pass through.

[0008] Preferably, the cam is formed with a groove of fixed depth along its circumference, and the wire rope is sleeved in the groove and extends and retracts as the cam rotates.

[0009] Preferably, the pulley group includes a fixed pulley, a movable pulley, and a reversing pulley. The fixed pulley is disposed in the transverse tube; the movable pulley is disposed on the rotating connecting rod and can rotate with it; the reversing pulley is disposed in the longitudinal tube and located at the connection between the longitudinal tube and the transverse tube. One end of the wire rope is connected to the drive mechanism, and the other end is changed direction by the reversing pulley, passes through the fixed pulley, and wraps around the movable pulley before being sleeved on the cam.

[0010] Preferably, the fixed pulley and the reversing pulley are arranged axially perpendicular to each other, and their outer peripheral surfaces are tangent to the same vertical line.

[0011] Preferably, the driving mechanism includes a lead screw, a slider, and a driving assembly. Two lead screws are provided, located inside the longitudinal tube and extending from the middle of the longitudinal tube to both ends. The slider is located in the longitudinal tube and threadedly connected to the lead screw. One end of the steel wire rope is fixed to the slider. The driving assembly is connected to the lead screw and drives the two lead screws to rotate synchronously, thereby driving the two sliders to move synchronously.

[0012] Preferably, the drive assembly includes a synchronous transmission component disposed between the two lead screws and a servo motor for driving the synchronous transmission component to rotate.

[0013] Preferably, the flipping mechanism further includes a roller, which is rotatably mounted on the top of the rotating link, and the bottom surface of the bed board is slidably connected to the rotating link through the roller.

[0014] As can be seen from the above description of the present invention, compared with the prior art, the beneficial effects of the present invention are: by fixing the end of the wire rope to the cam, the rotation of the cam can make fine adjustments to the position of the fixed end of the wire rope. When the wire ropes on both sides are stretched to different degrees and need to be adjusted, it is only necessary to control the rotation of the cam in the tensioned state and adjust it until the angle of the rotating connecting rods on both sides is consistent, so that the adjustment of the electric bed can be completed quickly. It is efficient, fast and has high practicality.

[0015] During adjustment, simply loosen the adjusting nut slightly and rotate the adjusting bolt on one side to drive the cam to rotate via the key block. After adjustment, tighten the nut again to fix the cam.

[0016] Since the cam is driven to rotate by the key block, the mounting plate needs to be formed with a clearance groove that allows the keyway to extend into, so as to facilitate installation.

[0017] The fixed pulley and the reversing pulley, whose axes are perpendicular to each other, are tangent to the same vertical line, which ensures the accuracy of the wire rope winding and transmission, and further ensures the accuracy of the adjustment mechanism during operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0020] Figure 3 This is a cross-sectional view of the adjusting mechanism of this utility model;

[0021] Figure 4 This is an exploded view of the adjusting structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the clearance hole of this utility model;

[0023] Figure 6 This is a schematic diagram of the adjustment of this utility model. Figure 1 ;

[0024] Figure 7 This is a schematic diagram of the adjustment of this utility model. Figure 2 ;

[0025] Figure 8 This is a partial structural schematic diagram of the present invention;

[0026] In the diagram: 1-Bed frame; 11-Longitudinal tube; 12-Transverse tube; 13-Mounting plate; 14-Leaning hole; 2-Bed board; 3-Tilting mechanism; 31-Rotating linkage; 32-Pulley block; 321-Fixed pulley; 322-Moving pulley; 323-Reversing pulley; 33-Wire rope; 34-Roller; 4-Drive mechanism; 41-Lead screw; 42-Slider; 43-Drive assembly; 431-Synchronous transmission component; 432-Servo motor; 5-Adjustment mechanism; 51-Cam; 511-Shaft hole; 52-Adjusting bolt; 53-Adjusting nut; 54-Connector; 541-First keyway; 542-Second keyway; 543-Key block; 55-Groove; 56-Leaning groove. Detailed Implementation

[0027] The present invention will be further described below through specific embodiments.

[0028] Reference Figures 1 to 8As shown, an electric bed with a quickly adjustable steel wire rope 33 includes a bed frame 1, a bed board 2, a flipping mechanism 3, a drive mechanism 4, and an adjustment mechanism 5.

[0029] The bed frame 1 includes two longitudinal tubes 11 arranged along the length of the bed board 2 and two transverse tubes 12 formed along the width of the bed board 2. Mounting plates 13 are formed on both sides of the transverse tubes 12, and clearance holes 14 are formed on the mounting plates 13.

[0030] The bed board 2 can be flipped up and mounted on the bed frame 1.

[0031] Two flipping mechanisms 3 are provided, located in the transverse tubes 12 on the front and rear sides of the bed board 2 respectively. Each mechanism includes a rotating connecting rod 31, a pulley block 32, a steel wire rope 33, and rollers 34. The rotating connecting rod 31 is rotatably mounted inside the transverse tube 12, with its top contacting the bed board 2. The bed board 2 flips as the flipping mechanism 3 operates. The pulley block 32 includes a fixed pulley 321, a movable pulley 322, and a reversing pulley 323. The fixed pulley 321 is located in the transverse tube 12, and the movable pulley 322... 22 is mounted on the rotating connecting rod 31 and can rotate with it. The reversing pulley 323 is mounted in the longitudinal tube 11 and located at the connection between the longitudinal tube 11 and the transverse tube 12. One end of the wire rope 33 is connected to the drive mechanism 4, and the other end is redirected by the reversing pulley 323, passes through the fixed pulley 321, and extends into the transverse tube 12 after winding around the rotating pulley 322. The roller 34 is rotatably mounted on the top of the rotating connecting rod 31, and the bottom surface of the bed board 2 is slidably connected to the rotating connecting rod 31 through the roller 34. Specifically, the fixed pulley 321 and the reversing pulley 323 are axially perpendicular to each other, and their outer circumferential surfaces are tangent to the same vertical line, ensuring the accuracy of the wire rope 33 winding transmission and further ensuring the accuracy of the adjustment mechanism 5 during operation.

[0032] The drive mechanism 4 is located in the longitudinal tube 11 on one side and is connected to the other end of the two steel wire ropes 33 to drive the rotating connecting rod 31 to rotate, so that the two flipping connecting rods rotate synchronously. The drive mechanism 4 includes lead screws 41, sliders 42, and drive assembly 43. There are two lead screws 41, located in the longitudinal tube 11 and extending from the middle of the longitudinal tube 11 to both ends. The sliders 42 are located in the longitudinal tube 11 and are threadedly connected to the lead screws 41. One end of the steel wire rope 33 is fixed to the slider 42. The drive assembly 43 is connected to the lead screws 41 and drives the two lead screws 41 to rotate synchronously, so as to drive the two sliders 42 to move synchronously. The drive assembly 43 includes a synchronous transmission component 431 disposed between the two lead screws 41 and a servo motor 432 that drives the synchronous transmission component 431 to rotate. The synchronous transmission component 431 is a worm gear structure. The servo motor 432 drives the worm gear structure to rotate, so that the two lead screws 41 rotate synchronously.

[0033] The adjusting mechanism 5 corresponds one-to-one with the tilting mechanism 3, including a cam 51, an adjusting bolt 52, an adjusting nut 53, and a connecting piece 54. The cam 51 is rotatably mounted in the bed frame 1. One end of the wire rope 33, located inside the transverse tube 12, is wound around the pulley group 32 and then sleeved on the cam 51. The cam 51 has a groove 55 formed circumferentially to prevent slippage. The adjusting bolt 52 passes through the bed frame 1 and the cam 51 and is threadedly connected to the adjusting nut 53. The connecting piece 54 is located between the cam 51 and the adjusting bolt 52, allowing the cam 51 to rotate with the adjusting bolt 52, thereby finely adjusting the wire rope 33. By fixing the end of the wire rope 33 to the cam 51, the rotation of the cam 51 can make fine adjustments to the position of the fixed end of the wire rope 33. When the wire ropes 33 on both sides are stretched to different degrees and need adjustment, simply control the rotation of the cam 51 in the tensioned state and adjust it until the angles of the rotating connecting rods 31 on both sides are consistent, thus quickly completing the adjustment of the electric bed. At this point, it should be noted that if the angles of the rotating connecting rods 31 on both sides cannot be kept consistent regardless of the rotation state of the cam 51, it should be determined that the wire rope 33 has reached its fatigue limit. In this case, there is no need to adjust the cam 51 further, but the wire rope 33 needs to be replaced. The adjusting nut 53 is a lock nut to prevent it from falling off completely and being lost when tightening or loosening the adjusting nut 53.

[0034] Specifically, the cam 51 has a shaft hole 511 through which the adjusting bolt 52 passes. The connecting member 54 includes a first keyway 541, a second keyway 542, and a key block 543. The first keyway 541 is formed on the side of the adjusting bolt 52 and extends along the length of the adjusting bolt 52. The second keyway 542 is formed on the protrusion in a direction parallel to the axial direction of the shaft hole 511 and communicates with the shaft hole 511. The key block 543 is disposed between the first keyway 541 and the second keyway 542 so that the cam 51 rotates with the adjusting bolt 52. During adjustment, simply loosen the adjusting nut 53 slightly, and the cam 51 will rotate via the key block 543 by controlling the rotation of the adjusting bolt 52 on one side. After adjustment, tighten the nut again to fix the cam 51.

[0035] Furthermore, the relief hole 14 is recessed outward to form a relief groove 56 through which the key block 543 can pass. Since the rotation of the cam 51 is achieved by the key block 543, the mounting plate 13 needs to be formed with a relief groove 56 into which the keyway can extend, so as to facilitate installation.

[0036] During adjustment, the control drive mechanism 4 tightens the wire rope 33, causing the rotating connecting rod 31 to rotate the bed plate 2 to its maximum angle. Then, the angle between the rotating connecting rods 31 on both sides and the bed frame 1 is measured. Since the initial state is such that both cams 51 are in the relaxed state of the wire rope 33 (the wire rope 33 gradually tightens as the cams 51 rotate), the angle difference can be used to determine which side of the wire rope 33 is experiencing fatigue elongation. Then, loosen the adjusting nut 53 at the corresponding position and use a wrench to drive the adjusting bolt 52 to rotate to fine-tune the state of the wire rope 33 until the angles of the rotating connecting rods 31 on both sides are consistent. Then, tighten the adjusting nut 53 again to complete the adjustment. If the cam 51 cannot maintain the same angle even when adjusted to its limit position, it should be considered that the wire rope 33 has reached its fatigue limit and needs to be replaced and maintained in time. This application fixes the end of the wire rope 33 to the cam 51. The rotation of the cam 51 can make fine adjustments to the position of the fixed end of the wire rope 33. When the wire ropes 33 on both sides are stretched to different degrees and need to be adjusted, the cam 51 can be controlled to rotate under tension and adjusted until the angles of the rotating connecting rods 31 on both sides are consistent. This can quickly complete the adjustment of the electric bed, which is efficient, fast and highly practical.

[0037] The above description is merely a preferred embodiment of the present utility model, and therefore cannot be construed as limiting the scope of the present utility model. All equivalent changes and modifications made in accordance with the scope of the patent application and the contents of the specification of the present utility model shall still fall within the scope of the patent of the present utility model.

Claims

1. An electric bed with a quickly adjustable steel wire rope, comprising a bed frame and a bed board that can be flipped and mounted on the bed frame, characterized in that: It also includes a flipping mechanism, a drive mechanism, and an adjustment mechanism. There are two flipping mechanisms, located on the front and rear sides of the bed board respectively. Each mechanism includes a rotating link, a pulley system, and a steel wire rope. The rotating link is rotatably mounted on the bed frame and contacts the bed board, allowing the bed board to flip as the flipping mechanism operates. One end of the steel wire rope extends around the pulley system and is fixed to the bed frame. The drive mechanism is connected to the other end of the two steel wire ropes and drives the rotating link to rotate, causing the two flipping links to rotate synchronously. The adjustment mechanism corresponds to the flipping mechanism and includes a cam, an adjusting bolt, an adjusting nut, and a connector. The cam is rotatably mounted in the bed frame, and one end of the steel wire rope extends around the pulley system and is sleeved on the cam. The adjusting bolt passes through the bed frame and the cam and is threadedly connected to the adjusting nut. The connector is located between the cam and the adjusting bolt, allowing the cam to rotate with the adjusting bolt, thereby fine-tuning the steel wire rope.

2. The electric bed with a quickly adjustable steel wire rope according to claim 1, characterized in that: The cam has a shaft hole through which the adjusting bolt passes. The connecting member includes a first keyway, a second keyway, and a key block. The first keyway is formed on the side of the adjusting bolt and extends along the length of the adjusting bolt. The second keyway is formed on the protrusion in a direction parallel to the axial direction of the shaft hole and communicates with the shaft hole. The key block is disposed between the first keyway and the second keyway so that the cam rotates with the adjusting bolt.

3. The electric bed with a quickly adjustable steel wire rope according to claim 2, characterized in that: The bed frame includes two longitudinal tubes arranged along the length of the bed board and two transverse tubes formed along the width of the bed board. The drive mechanism is arranged in one longitudinal tube, and the flipping mechanism is arranged in the two transverse tubes respectively. Mounting plates are formed with upward protrusions on both sides of the transverse tubes. The mounting plates are formed with clearance holes for the adjusting bolts to pass through, and clearance holes are recessed outward to form clearance grooves for the key blocks to pass through.

4. The electric bed with a quickly adjustable wire rope according to claim 1, characterized in that: The cam has a groove with a fixed depth formed along its circumference, and the wire rope is sleeved in the groove and extends and retracts as the cam rotates.

5. The electric bed with a quickly adjustable steel wire rope according to claim 3, characterized in that: The pulley system includes a fixed pulley, a movable pulley, and a reversing pulley. The fixed pulley is located in the transverse tube; the movable pulley is located on the rotating connecting rod and can rotate with it; the reversing pulley is located in the longitudinal tube and at the connection between the longitudinal tube and the transverse tube. One end of the wire rope is connected to the drive mechanism, and the other end is changed direction by the reversing pulley, passes through the fixed pulley, and wraps around the movable pulley before being sleeved on the cam.

6. The electric bed with a quickly adjustable steel wire rope according to claim 5, characterized in that: The fixed pulley and the reversing pulley are axially perpendicular to each other, and their outer circumferential surfaces are tangent to the same vertical line.

7. An electric bed with a quickly adjustable wire rope according to claim 3, characterized in that: The driving mechanism includes a lead screw, a slider, and a driving assembly. There are two lead screws located inside the longitudinal tube and extending from the middle of the longitudinal tube to both ends. The slider is located in the longitudinal tube and is threadedly connected to the lead screw. One end of the steel wire rope is fixed to the slider. The driving assembly is connected to the lead screw and drives the two lead screws to rotate synchronously, thereby driving the two sliders to move synchronously.

8. An electric bed with a quickly adjustable wire rope according to claim 7, characterized in that: The drive assembly includes a synchronous transmission component disposed between the two lead screws and a servo motor that drives the synchronous transmission component to rotate.

9. An electric bed with a rapidly adjustable wire rope according to claim 1, characterized in that: The flipping mechanism also includes rollers, which are rotatably mounted on the top of the rotating link, and the bottom surface of the bed board is slidably connected to the rotating link through the rollers.

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