Small bed head and tail frame lifting device

Abstract

The utility model discloses a small bed head and tail frame lifting device which comprises supports, a lifting frame, a steel wire component force mechanism, a gear transmission mechanism and a positioning guide mechanism, the lifting frame is arranged between the supports in a sliding mode, four sets of guide rollers are arranged on the lifting frame in a rotating mode, and steel wire ropes are fixedly arranged in the tops of the two sides of the supports in a matched mode. A screw is rotatably arranged in the middle of the lifting frame and sleeved with a threaded sleeve in a threaded fit mode, steel wire fixing holes are symmetrically formed in the two sides of the threaded sleeve, the tail end of a steel wire rope penetrates into the steel wire fixing holes to be knotted and limited, and a gear transmission mechanism is arranged below the middle of the lifting frame; the steel wire rope is pulled when the screw is in screw-thread fit with the threaded sleeve for lifting adjustment, then the guide roller descends, and the bearing load of the threaded sleeve is shared and transferred to the lifting frame through the steel wire rope, so that the bearing load on the screw and the threaded sleeve is effectively reduced; the problem that a screw rod and a sliding block are matched through threads to support the weight of the bed board, and the screw rod is prone to abrasion and sliding after long-time use is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bed lifting devices, in particular to a small head and tail frame lifting device. Background Art

[0002] A liftable bed generally refers to a bed that can adjust the height or angle of the bed through electric or other means. In the fields of medical beds, nursing beds, etc., liftable beds have been widely used. Most of the existing liftable head and tail frames are made of metal parts, which have problems such as many components, difficult processing, high cost, complex structure, large volume, and difficult packaging.

[0003] In the utility model with the application number 202320276699.9, a liftable nursing bed is disclosed. Through the cooperative setting among the adjusting component, the support plate, the control component and the guiding component, the adjusting component can be used to rotate the support plate inside the rotating groove, so as to tilt and support the patient lying on the bed board, improving the comfort of the patient on the bed board. The height of the bed board on the connecting seat is also adjusted through the control component, which is convenient for the patient to get on and off the bed board and will not cause secondary injury to the patient's wound. And the guiding component can support both ends of the bed board, ensuring the stability of the bed body structure formed by the base, the connecting seat and the bed board.

[0004] However, after the above-mentioned liftable nursing bed uses the threaded cooperation between the slider and the first lead screw to push the hinge rod to lift the bed board, the first lead screw and the slider are continuously squeezed by the gravity on the bed board. After long-term use, it is easy to cause damage to the first lead screw and the slider, resulting in thread slipping. Therefore, the present utility model proposes a small head and tail frame lifting device to solve the problems existing in the prior art. Summary of the Utility Model

[0005] Aiming at the above problems, the purpose of the present utility model is to propose a small head and tail frame lifting device. When the small head and tail frame lifting device is lifted and adjusted through the threaded cooperation between the screw rod and the threaded sleeve, the steel wire rope is pulled, and then the load borne by the threaded sleeve is transferred to the lifting frame through the guiding roller, effectively reducing the load borne by the screw rod and the threaded sleeve, effectively extending the service life of the screw rod and the threaded sleeve, and solving the problem that the threaded cooperation between the lead screw and the slider is easy to wear and cause thread slipping after long-term use for supporting the weight of the bed board.

[0006] To achieve the purpose of the utility model, the utility model is implemented through the following technical solutions: a small bedside frame lifting device, including a bracket, a lifting frame, a wire force distribution mechanism, a gear transmission mechanism and a positioning guide mechanism, a lifting frame is slidably arranged between the brackets, the wire force distribution mechanism includes guide rollers, wire ropes, screws, threaded sleeves and wire fixing holes, guide rollers are arranged and rotatably arranged on the lifting frame, and the guide rollers are provided in four groups, wire ropes are matched and fixed in the top of both sides of the bracket, a screw is rotatably arranged in the middle of the lifting frame, a threaded sleeve is provided on the screw threaded matching sleeve, wire fixing holes are symmetrically opened on both sides of the threaded sleeve, the ends of the wire ropes are inserted into the wire fixing holes and knotted to limit the position, and a gear transmission mechanism is provided in the middle and lower part of the lifting frame.

[0007] A further improvement is that the middle section of the steel wire rope passes around the guide roller, and the steel wire rope is in contact with the lower end of the guide roller.

[0008] A further improvement is that the gear transmission mechanism includes a gear seat, a first bevel gear, a second bevel gear and a crank, a gear seat is fixed with bolts at the lower middle part of the lifting frame, a first bevel gear is fixed at the lower end of the screw rod through a bracket, a second bevel gear is rotatably provided at the lower inner part of the gear seat, and a crank is rotatably provided at the outer side of the gear seat.

[0009] A further improvement is that the first bevel gear is meshed with the second bevel gear for transmission, and the crank is fixedly connected to the second bevel gear.

[0010] A further improvement is that the positioning and guiding mechanism includes a guide block, a headstock and tailstock frame, a first positioning hole, a second positioning hole, a positioning tube and a positioning guide hole, a guide block is rotatably provided at the upper end of the screw, a headstock and tailstock frame is slidably provided between the brackets, a first positioning hole is provided at the lower middle of the headstock and tailstock frame, the guide block is inserted into the first positioning hole and fixed, a second positioning hole is symmetrically provided at the lower part of the headstock and tailstock frame, a positioning tube is matched and inserted into the second positioning hole, and positioning guide holes are symmetrically provided on both sides of the threaded sleeve.

[0011] A further improvement is that the two ends of the positioning tube are respectively inserted into the lifting frame and the head and tail frames of the bed, and the positioning tube passes through the positioning guide hole for auxiliary guidance.

[0012] A further improvement is that: small-diameter threads are symmetrically arranged at both ends of the screw rod, and springs are fitted into the upper and lower ends of the screw rod.

[0013] The beneficial effects of the present utility model are as follows: When the present utility model adjusts the lifting by the threaded fit of the screw rod and the threaded sleeve, the steel wire rope is pulled, and then the load-bearing of the threaded sleeve is transferred to the lifting frame through the guiding roller by the steel wire rope. This effectively reduces the load-bearing on the screw rod and the threaded sleeve, effectively extends the service life of the screw rod and the threaded sleeve, and solves the problem that the wear caused by the long-term use of the threaded fit between the lead screw and the slider to support the weight of the bed board is likely to lead to thread slipping. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional overall schematic diagram of the present utility model;

[0015] Figure 2 It is a three-dimensional schematic diagram of the threaded sleeve of the present utility model;

[0016] Figure 3 It is a three-dimensional internal schematic diagram of the gear seat of the present utility model;

[0017] Figure 4 It is a three-dimensional schematic diagram of the head and tail frame of the present utility model;

[0018] Figure 5 It is a three-dimensional schematic diagram of the screw rod of the present utility model.

[0019] Wherein: 1. Bracket; 2. Lifting frame; 3. Guiding roller; 4. Steel wire rope; 5. Screw rod; 6. Threaded sleeve; 7. Steel wire fixing hole; 8. Gear seat; 9. First helical gear; 10. Second helical gear; 11. Crank; 12. Guide block; 13. Head and tail frame; 14. First positioning hole; 15. Second positioning hole; 16. Positioning pipe; 17. Positioning guiding hole; 18. Small-diameter thread; 19. Spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In order to deepen the understanding of the present utility model, the following will further elaborate on the present utility model in combination with embodiments. These embodiments are only used to explain the present utility model and do not constitute a limitation to the protection scope of the present utility model.

[0021] According to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5As shown in the figure, this embodiment provides a small head and tail frame lifting device, which includes a bracket 1, a lifting frame 2, a wire force distribution mechanism, a gear transmission mechanism, and a positioning and guiding mechanism. The lifting frame 2 is slidably arranged between the brackets 1. The wire force distribution mechanism includes a guiding roller 3, a steel wire rope 4, a screw rod 5, a threaded sleeve 6, and a wire fixing hole 7. The guiding rollers 3 are arranged in a row and rotatably provided on the lifting frame 2. There are four groups of guiding rollers 3. The steel wire ropes 4 are fixedly arranged inside the tops on both sides of the bracket 1. The middle section of the steel wire rope 4 bypasses the guiding roller 3, and the steel wire rope 4 is in contact with the lower end of the guiding roller 3. The screw rod 5 is rotatably arranged in the middle of the lifting frame 2. The threaded sleeve 6 is threadedly sleeved on the screw rod 5. Wire fixing holes 7 are symmetrically opened on both sides of the threaded sleeve 6. The end of the steel wire rope 4 passes through the wire fixing hole 7 and is knotted and limited. A gear transmission mechanism is arranged below the middle of the lifting frame 2. When the head and tail frame 13 needs to be adjusted for lifting, the rotation of the screw rod 5 drives the threaded sleeve 6 to lift and move through meshing. At the same time, the steel wire rope 4 is pulled through the wire fixing hole 7 to drive the lifting frame 2 to lift and lower synchronously. By using the steel wire rope 4 in contact with the guiding roller 3, the load bearing between the screw rod 5 and the threaded sleeve 6 is transferred to the guiding roller 3 and the lifting frame 2, effectively sharing the load bearing pressure of the threaded sleeve 6 and effectively preventing the problems of damage and thread slipping of the screw rod 5 and the threaded sleeve 6.

[0022] The gear transmission mechanism includes a gear seat 8, a first helical gear 9, a second helical gear 10, and a crank 11. The gear seat 8 is fixedly arranged by bolts below the middle of the lifting frame 2. The lower end of the screw rod 5 passes through the bracket 1 and is fixedly provided with the first helical gear 9. The second helical gear 10 is rotatably arranged below the gear seat 8. The crank 11 is rotatably arranged outside the gear seat 8. The first helical gear 9 and the second helical gear 10 are meshed and driven. The crank 11 is fixedly connected to the second helical gear 10. When the lifting adjustment is carried out, the rotation of the crank 11 drives the second helical gear 10 to rotate synchronously. After meshing and driving the first helical gear 9 to rotate, the screw rod 5 is driven to rotate for lifting adjustment.

[0023] The positioning and guiding mechanism includes a guide block 12, a head and tail frame 13, a first positioning hole 14, a second positioning hole 15, a positioning pipe 16, and a positioning and guiding hole 17. The guide block 12 is rotatably arranged at the upper end of the screw rod 5. The head and tail frame 13 is slidably arranged between the brackets 1. A first positioning hole 14 is opened below the middle of the head and tail frame 13. The guide block 12 is inserted into the first positioning hole 14 and fixed. Second positioning holes 15 are symmetrically opened below the head and tail frame 13. The positioning pipes 16 are inserted into the second positioning holes 15 in a matching manner. Positioning and guiding holes 17 are symmetrically opened on both sides of the threaded sleeve 6. Both ends of the positioning pipe 16 are inserted into the lifting frame 2 and the head and tail frame 13 respectively. The positioning pipe 16 passes through the positioning and guiding hole 17 to assist in guiding. When the threaded sleeve 6 is threadedly matched with the screw rod 5, the threaded sleeve 6 remains stable during movement through the sliding fit between the second positioning hole 15 and the positioning pipe 16. The guide block 12 is convenient to rotate stably between the head and tail frame 13 and the lifting frame 2 through the cooperation with the first positioning hole 14.

[0024] Both ends of the screw rod 5 are symmetrically provided with small-diameter threads 18. Springs 19 are sleeved on the upper and lower ends of the screw rod 5 in a matching manner. When the threaded sleeve 6 moves up and down to the end of the screw rod 5, the threaded engagement with the threaded sleeve 6 is released by the small-diameter threads 18, causing the screw rod 5 to rotate freely. At the same time, the threaded sleeve 6 is limited by the spring 19.

[0025] When the height of the head and tail frame of the small head and tail frame lifting device needs to be adjusted, the crank is rotated to drive the second helical gear to rotate. The second helical gear meshes with the first helical gear to drive the screw rod to rotate. The threaded sleeve moves up and down along the direction of the positioning tube by using the threaded engagement between the screw rod and the threaded sleeve. When the threaded sleeve moves, the tightening wire is pulled. After being guided and converted by the guide roller, the load on the threaded sleeve is evenly distributed and transferred to the lifting frame, effectively reducing the load on the threaded sleeve and the screw rod, extending the service life of the threaded sleeve, facilitating the use of materials such as plastics in production, and reducing costs.

[0026] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the description in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A small head and tailstock lifting device, characterized in that: It includes a bracket (1), a lifting frame (2), a wire force dividing mechanism, a gear transmission mechanism and a positioning and guiding mechanism. The lifting frame (2) is slidably arranged between the brackets (1). The wire force dividing mechanism includes a guiding roller (3), a steel wire rope (4), a screw rod (5), a threaded sleeve (6) and a steel wire fixing hole (7). The guiding rollers (3) are arranged in a row and rotatably provided on the lifting frame (2). There are four groups of the guiding rollers (3). The steel wire ropes (4) are fixedly arranged inside the tops on both sides of the bracket (1). The screw rod (5) is rotatably provided in the middle of the lifting frame (2). The threaded sleeve (6) is threadedly sleeved on the screw rod (5). The steel wire fixing holes (7) are symmetrically opened on both sides of the threaded sleeve (6). The end of the steel wire rope (4) passes through the steel wire fixing hole (7) and is knotted and limited. A gear transmission mechanism is arranged below the middle of the lifting frame (2).

2. The small head and tailstock lifting device according to claim 1, wherein: The middle section of the steel wire rope (4) bypasses the guiding roller (3), and the steel wire rope (4) is in contact with the lower end of the guiding roller (3).

3. The small head and tailstock lifting device according to claim 1, characterized in that: The gear transmission mechanism includes a gear seat (8), a first helical gear (9), a second helical gear (10) and a crank (11). The gear seat (8) is fixedly arranged by bolts below the middle of the lifting frame (2). The lower end of the screw rod (5) passes through the bracket (1) and is fixedly provided with the first helical gear (9). The second helical gear (10) is rotatably arranged below the inside of the gear seat (8). The crank (11) is rotatably arranged outside the gear seat (8).

4. A small head and tailstock lifting device according to claim 3, characterized in that: The first helical gear (9) and the second helical gear (10) are meshed and driven, and the crank (11) is fixedly connected to the second helical gear (10).

5. A small head and tailstock lifting device according to claim 1, characterized in that: The positioning and guiding mechanism includes a guide block (12), a head and tail frame (13), a first positioning hole (14), a second positioning hole (15), a positioning pipe (16) and a positioning and guiding hole (17). The guide block (12) is rotatably arranged at the upper end of the screw rod (5). The head and tail frame (13) is slidably arranged between the brackets (1). The first positioning hole (14) is opened below the middle of the head and tail frame (13). The guide block (12) is inserted into the first positioning hole (14) and fixed. The second positioning holes (15) are symmetrically opened below the head and tail frame (13). The positioning pipes (16) are inserted into the second positioning holes (15) in a matching manner. The positioning and guiding holes (17) are symmetrically opened on both sides of the threaded sleeve (6).

6. The small head and tailstock lifting device according to claim 5, wherein: Both ends of the positioning pipe (16) are inserted into the lifting frame (2) and the head and tail frame (13) respectively, and the positioning pipe (16) passes through the positioning and guiding hole (17) to assist in guiding.

7. A small head and tailstock lifting device according to claim 1, characterized in that: The small-diameter threads (18) are symmetrically arranged at both ends of the screw rod (5), and the springs (19) are sleeved on the upper and lower ends of the screw rod (5) in a matching manner.

Images