Synchronous lifting mechanism for multiple points

Abstract

The utility model discloses a synchronous lifting mechanism for multiple points, which relates to the field of lifting floors and particularly comprises a rotating motor, a plurality of lifting structures in sequential transmission connection and a first transmission structure in transmission connection with the rotating motor and any lifting structure. The lifting structure comprises a groove-shaped seat fixedly connected to the bottom plate, connecting seats fixedly arranged at the two ends of the groove-shaped seat, a lead screw arranged between the two connecting seats in a penetrating mode, a sliding block arranged on the lead screw in a sleeving mode, and a first arm frame rotationally connected with the sliding block. The second arm frame is rotationally connected between the first arm frame and one connecting base, the supporting plate is horizontally arranged at the top end of the first arm frame, and the lead screw is rotationally connected with the connecting base; the sliding blocks are in threaded connection with the lead screws, the bottoms of the sliding blocks are embedded in the groove-shaped bases and can slide along the groove-shaped bases, the multiple lead screws are sequentially in transmission connection with the multiple supporting plates and are fixedly connected to the bottom of the lifting floor, synchronous transmission of the multiple lifting structures is achieved through mechanical transmission, transmission is stable, and control is easy.

Description

Technical Field

[0001] The utility model relates to the field of lifting floors, in particular to a synchronous lifting mechanism for multiple points. Background Art

[0002] Currently, medical electron linear accelerators utilize a standing wave accelerator tube, mounted vertically and attached to a treatment head. This accelerator is driven by a rotating gantry, which can rotate 360° around its axis. Medical requirements dictate the height between the axis and the ground. Therefore, when the gantry is in the vertical position, the treatment head must be positioned below ground level.

[0003] To meet this need, a lift floor is installed within a certain range. When the rotating gantry rotates within a predetermined angle range, the lift floor is lowered to ensure that the treatment head is lower than the ground and does not collide with the lift floor. When the rotating gantry is outside the predetermined angle range, the lift floor rises back to ground level, which does not affect the doctor's treatment positioning.

[0004] The existing lifting mechanism is located between the lifting floor and the base plate below it. It uses hydraulic transmission and is supported by a single scissor arm. Hydraulic transmission is subject to significant flow resistance and leakage, resulting in unstable transmission, which can easily cause the lifting floor to not be raised or lowered in time or not fully raised. Furthermore, large-area lifting floors utilize a single scissor arm structure, which lacks stability and strength. In this case, if multiple lifting mechanisms are used for joint lifting, the synchronization of each lifting mechanism is difficult to ensure, making it difficult to maintain the levelness of the lifting base plate. Utility Model Content

[0005] The utility model provides a synchronous lifting mechanism for multiple points, so as to solve the problems of unstable lifting and lowering and asynchronism of multiple lifting structures in the existing lifting mechanism on the lifting floor of the medical electron linear accelerator, which leads to the lifting floor not being lifted in time or not being lifted in place.

[0006] The utility model is a synchronous lifting mechanism for multiple points, which adopts the following technical solution: the mechanism comprises: a rotating motor, a plurality of lifting structures connected in sequence by transmission, and a transmission structure connecting the rotating motor and any one of the lifting structures by transmission;

[0007] The lifting structure includes a groove-shaped seat fixedly connected to the base plate, connecting seats fixedly arranged at both ends of the groove-shaped seat, a screw rod passing between the two connecting seats, a slider sleeved on the screw rod, a first arm rotatably connected to the slider, a second arm rotatably connected between the first arm and a connecting seat, and a support plate horizontally arranged at the top end of the first arm, the screw rod is rotatably connected to the connecting seat; the slider is threadedly connected to the screw rod, and the bottom of the slider is embedded in the groove-shaped seat and slides along the groove-shaped seat;

[0008] A plurality of screw rods are sequentially connected for transmission; and a plurality of support plates are fixedly connected to the bottom of the lifting floor.

[0009] Preferably, the multiple lifting structures are sequentially connected by a connecting shaft, and the end of the connecting shaft is connected to the end of the screw rod by a universal joint.

[0010] Preferably, the screw rod is stepped, the middle section of the screw rod is a threaded section, and the sections on both sides of the screw rod are optical axis sections. The diameter of the optical axis section is smaller than the diameter of the threaded section. The connecting seat is sleeved on the optical axis section, and the end face of the connecting seat abuts the shoulder of the screw rod.

[0011] Preferably, there are two first arm supports, one end of the two first arm supports is hinged to both sides of the slider, the other end of the two first arm supports is hinged to both sides of the support block, and the support plate is arranged on the top of the support block;

[0012] There are two second arm frames, one end of the two second arm frames is hinged to the two first arm frames through a pin shaft, and the other ends of the two second arm frames are hinged to both sides of a connecting seat.

[0013] Preferably, the transmission structure is a pulley transmission structure, and the pulley transmission structure includes a first pulley, a second pulley, and a toothed belt connecting the first pulley and the second pulley;

[0014] The first pulley is sleeved on the output shaft of the rotating motor, and the second pulley is fixedly sleeved on one end of any one of the screw rods.

[0015] Preferably, a buffer washer is fixedly connected to a side of the connecting seat close to the slider.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In the present invention, the power provided by the rotating motor is transmitted to multiple lifting structures, driving the support plates on the multiple lifting structures to perform synchronous reciprocating motion in the vertical direction. It is only necessary to control the operation of the rotating motor to control the synchronous lifting of the points where the multiple lifting structures are located. The lifting process is stable, ensuring that the lifting floor is lifted and lowered in time and in place.

[0018] 2. In the present invention, the slider is embedded in the groove-shaped seat. At the same time, the slider is threadedly connected to the screw rod. In this case, the rotation of the screw rod drives the movement of the slider in the groove-shaped seat. Then, the movement of the slider drives the change of the inclination of the first arm, so that the support plate at the top of the first arm moves up and down. The tops of multiple support plates are directly fixedly connected with the lifting floor, which directly drives the lifting of the lifting floor. The whole relies on mechanical transmission, and the lifting process is stable and timely compared to hydraulic transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model installed on the base plate;

[0021] Figure 2 This is a structural diagram of the lifting structure of the utility model;

[0022] Figure 3 This is a schematic structural diagram of the rotating motor, transmission structure, lifting structure and universal joint of the utility model;

[0023] Figure 4 It is a structural diagram of the bottom plate and the lifting floor of the integral structure of the utility model;

[0024] Figure 5 This is a full cross-sectional view of the lifting structure of the utility model along the center of the screw rod.

[0025] Description of Reference Numerals

[0026] 1. Rotating motor; 2. Lifting structure; 3. Transmission structure; 4. Connecting shaft; 5. Universal joint; 6. Base plate; 7. Lifting floor; 21. Grooved seat; 22. Connecting seat; 23. Screw rod; 24. Slider; 25. First arm; 26. Second arm; 27. Support plate; 28. Support block; 29. ​​Buffer washer; 31. First pulley; 32. Second pulley; 33. Toothed belt. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Example 1

[0029] Embodiment 1 of the utility model is a synchronous lifting mechanism for multiple points, such as Figures 1 to 5 As shown, the mechanism includes: a rotating motor 1, a plurality of lifting structures 2 that are sequentially connected in transmission, and a transmission structure 3 that is connected in transmission between the rotating motor 1 and any one of the lifting structures 2;

[0030] The lifting structure 2 includes a groove-shaped seat 21 fixedly connected to the base plate 6, connecting seats 22 fixedly arranged at both ends of the groove-shaped seat 21, a screw rod 23 passing between the two connecting seats 22, a slider 24 sleeved on the screw rod 23, a first arm 25 rotatably connected to the slider 24, a second arm 26 rotatably connected between the first arm 25 and one of the connecting seats 22, and a support plate 27 horizontally arranged at the top of the first arm 25. The screw rod 23 is rotatably connected to the connecting seat 22; the slider 24 is threadedly connected to the screw rod 23, and the bottom of the slider 24 is embedded in the groove-shaped seat 21 and slides along the groove-shaped seat 21;

[0031] Multiple screw rods 23 are connected in sequence; multiple support plates 27 are fixedly connected to the bottom of the lifting floor 7.

[0032] In this embodiment, it should be noted that both ends of the screw rod 23 extend beyond the connecting seat; the connecting seat 22 limits the axial movement of the screw rod 23, and the groove seat 21 limits the rotation of the slider 24; the groove seat 21 is fixed to the base plate 6 by screws; the connecting seat 22 is fixed to the groove seat 21 by screws; and multiple support plates 27 are fixed to the bottom of the lifting floor 7 by bolts.

[0033] In this embodiment, it should be noted that the screw rod 23 can rotate clockwise or counterclockwise.

[0034] During actual use of this embodiment, for a certain lifting structure 2, the rotation of the screw rod 23 drives the slider 24 to move along the axial direction of the screw rod 23, and the movement of the slider 24 drives the inclination angle of the first arm 25 to change. At this time, the vertical height of the support plate 27 changes, achieving the lifting effect; for two adjacent lifting structures 2, when the screw rod 23 of one of them rotates, it will drive the rotation of the adjacent screw rod 23 connected to it; the power of the rotating motor 1 is transmitted to any lifting structure 2 through the transmission structure 3. At the same time, multiple lifting structures 2 are sequentially connected through multiple screw rods 23, that is, the rotating motor 1 drives multiple lifting structures 2 to lift and lower synchronously.

[0035] In this embodiment, the multiple lifting structures 2 are sequentially connected through the connecting shaft 4 , and the end of the connecting shaft 4 is connected to the end of the screw rod 23 through a universal joint 5 .

[0036] In this embodiment, it should be noted that, for two adjacent lifting structures 2, the screw rod 23 on one lifting structure 2 rotates, driving the connecting shaft 4 to rotate via the universal joint 5, and the rotation of the connecting shaft 4 drives the screw rod 23 on the other lifting structure 2 to rotate via the universal joint 5.

[0037] In this embodiment, it should be noted that, under the action of the universal joint 5 , the multiple lifting structures 2 can be arranged along a straight line or an arc.

[0038] In this embodiment, the screw rod 23 is stepped, the middle section of the screw rod 23 is a threaded section, and the sections on both sides of the screw rod 23 are optical axis sections. The diameter of the optical axis section is smaller than the diameter of the threaded section. The connecting seat 22 is sleeved on the optical axis section, and the end face of the connecting seat 22 abuts against the shoulder of the screw rod 23.

[0039] In this embodiment, it should be noted that the end surface of the connecting seat 22 abuts against the shoulder of the screw rod 23, thereby limiting the axial position of the screw rod 23, wherein the surface of the shoulder is smooth.

[0040] In this embodiment, there are two first arms 25 , one end of the two first arms 25 is hinged to both sides of the slider 24 , the other end of the two first arms 25 is hinged to both sides of the support block 28 , and the support plate 27 is set on the top of the support block 28 .

[0041] There are two second arms 26 , one end of the two second arms 26 is hinged to the two first arms 25 via a pin, and the other end of the two second arms 26 is hinged to two sides of a connecting base 22 .

[0042] In this embodiment, it should be noted that there are two first arms 25 and two second arms 26, which is beneficial to the stability of lifting.

[0043] In this embodiment, the transmission structure 3 is a pulley transmission structure, which includes a first pulley 31, a second pulley 32, and a toothed belt 33 connecting the first pulley 31 and the second pulley 32;

[0044] The first pulley 31 is sleeved on the output shaft of the rotating electrical machine 1 , and the second pulley 32 is fixedly sleeved on one end of any one of the screw rods 23 .

[0045] In this embodiment, it should be noted that the diameter of the first pulley is smaller than the diameter of the second pulley, which has a deceleration effect.

[0046] In this embodiment, a buffer washer 29 is fixedly connected to one side of the connecting seat 22 close to the slider 24 .

[0047] In this embodiment, it should be noted that the buffer washer 29 is located between the connecting seat 22 and the slider 24 to play an anti-collision and buffering role.

[0048] Example 2

[0049] Embodiment 2 of the utility model is a synchronous lifting mechanism for multiple positions. Different from embodiment 1, the transmission structure 3 is a gear transmission structure, which includes a first gear and a second gear meshing with the first gear; the first gear is fixedly sleeved on the output shaft of the rotating motor 1, and the second gear is fixedly sleeved on one end of any one of the screw rods 23.

[0050] In this embodiment, it should be noted that the diameter of the first gear is smaller than the diameter of the second gear, which has a deceleration effect.

[0051] Example 3

[0052] Embodiment 3 of the utility model is a synchronous lifting mechanism for multiple positions. The difference from embodiment 1 is that the transmission structure 3 is a sprocket transmission structure, which includes a first sprocket, a second sprocket, and a chain connecting the first sprocket and the second sprocket.

[0053] The first sprocket is fixedly sleeved on the output shaft of the rotary motor 1 , and the second sprocket is fixedly sleeved on one end of any one of the screw rods 23 .

[0054] In this embodiment, it should be noted that the diameter of the first sprocket is smaller than the diameter of the second sprocket, which has a deceleration effect.

[0055] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A synchronous lifting mechanism for multiple points, characterized in that: It comprises a rotating motor (1), a plurality of lifting structures (2) connected in series by transmission, and a transmission structure (3) connecting the rotating motor (1) and any one of the lifting structures (2); The lifting structure (2) includes a groove-shaped seat (21) fixedly connected to the bottom plate (6), a connecting seat (22) fixedly arranged at both ends of the groove-shaped seat (21), a screw rod (23) passing between the two connecting seats (22), a slider (24) sleeved on the screw rod (23), a first arm (25) rotatably connected to the slider (24), a second arm (26) rotatably connected between the first arm (25) and one of the connecting seats (22), and a support plate (27) horizontally arranged at the top end of the first arm (25), the screw rod (23) is rotatably connected to the connecting seat (22); the slider (24) is threadedly connected to the screw rod (23), the bottom of the slider (24) is embedded in the groove-shaped seat (21), and slides along the groove-shaped seat (21); The plurality of screw rods (23) are sequentially connected in transmission; and the plurality of support plates (27) are fixedly connected to the bottom of the lifting floor (7).

2. A synchronous lifting mechanism for multiple points according to claim 1, characterized in that: The plurality of lifting structures (2) are sequentially connected by a connecting shaft (4), and the end of the connecting shaft (4) is connected to the end of the screw rod (23) by a universal joint (5).

3. A synchronous lifting mechanism for multiple points according to claim 1, characterized in that: The screw rod (23) is in a stepped shape, the middle section of the screw rod (23) is a threaded section, the sections on both sides of the screw rod (23) are optical axis sections, the diameter of the optical axis section is smaller than the diameter of the threaded section, the connecting seat (22) is sleeved on the optical axis section, and the end face of the connecting seat (22) abuts against the shaft shoulder of the screw rod (23).

4. A synchronous lifting mechanism for multiple points according to claim 1, characterized in that: There are two first arm supports (25), one end of each of the two first arm supports (25) is hinged to both sides of the slider (24), and the other end of each of the two first arm supports (25) is hinged to both sides of the support block (28), and the support plate (27) is arranged on the top of the support block (28); There are two second arm supports (26), one end of the two second arm supports (26) is hinged to the two first arm supports (25) through a pin, and the other end of the two second arm supports (26) is hinged to both sides of one connecting seat (22).

5. The synchronous lifting mechanism for multiple points according to claim 1, characterized in that: The transmission structure (3) is a pulley transmission structure, and the pulley transmission structure includes a first pulley (31), a second pulley (32), and a toothed belt (33) connecting the first pulley (31) and the second pulley (32); The first pulley (31) is sleeved on the output shaft of the rotating motor (1), and the second pulley (32) is fixedly sleeved on one end of any one of the screw rods (23).

6. The synchronous lifting mechanism for multiple points according to claim 1, characterized in that: A buffer washer (29) is fixedly connected to one side of the connecting seat (22) close to the slider (24).

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