Wheel assembly, operating bed base and operating bed

Abstract

The utility model provides a wheel assembly, an operating bed base and an operating bed. The wheel assembly comprises wheels, a floating part, a fixing part and a driving device. The wheels are fixedly connected with the floating part; the fixed part is connected with the floating part through an elastic piece and provided with an avoiding groove. The driving device comprises a driving arm and a driving piece, one end of the driving arm is connected with the driving piece, the other end of the driving arm is a free end, the free end corresponds to the avoiding groove in position, and the driving piece is used for driving the driving arm to penetrate through the avoiding groove to press the floating part so that the floating part can drive the wheel to move downwards. When the wheel assembly needs to move, the driving arms penetrate through the avoiding grooves to press the floating parts, so that the wheels make contact with the ground, and the wheels can slide. When the wheel assembly needs to be braked, the driving piece is used for driving the driving arm to ascend, the floating part ascends under the action of the elastic piece, and therefore the wheel is driven to ascend to leave the ground, a vehicle is prevented from sliding under the action of force, and the technical problem that the wheel still slides or rolls after braking is solved.

Description

Technical Field

[0001] The utility model belongs to the structural technical field of wheel assemblies, and particularly relates to a wheel assembly, an operating bed base and an operating bed. Background Art

[0002] Operating beds are used in major hospitals to move patients. The wheel assemblies of operating beds need to have the functions of moving and braking, so that the operating bed can move when it is necessary to move patients, and during surgeries, the operating bed can be braked and fixed without moving.

[0003] In the prior art, brake pads are provided in the wheels of the wheel assembly. When the operating bed needs to be braked, the brake pads contact the wheels to form a large frictional force with the wheels, so that the wheels stop rolling. However, the wheels after braking will slide under the action of force, or the brake pads become loose, and the wheels will still slide, so that the operating bed after braking still moves. Summary of the Utility Model

[0004] The technical purpose of the utility model is to provide a wheel assembly, an operating bed base and an operating bed, aiming to solve the technical problem that the wheels still slide or roll after braking.

[0005] In the first aspect, to solve the above technical problem, the utility model is realized as follows. A wheel assembly includes:

[0006] A wheel;

[0007] A floating part, the wheel is fixedly connected to the floating part;

[0008] A fixing part, which is connected to the floating part through an elastic member and is provided with an avoidance groove;

[0009] A driving device, including a driving arm and a driving member. One end of the driving arm is connected to the driving member, and the other end is a free end, and the free end corresponds to the position of the avoidance groove. The driving member is used to drive the driving arm to pass through the avoidance groove to press the floating part, so that the floating part drives the wheel to move downward.

[0010] Further, the fixing part is provided with a limiting post, the floating part is provided with a limiting hole, the limiting post is arranged in the limiting hole, and the area of the limiting hole is larger than the cross-sectional area of the limiting post.

[0011] Further, the driving member includes a cylinder body and a push rod. One end of the push rod is connected to the cylinder body, and the other end is connected to the driving arm.

[0012] Further, the driving arm includes a first arm and a second arm connected to each other. The first arm and the second arm are arranged at an angle, and the angle is 100° - 160°;

[0013] A first connection hole is provided at the connection between the first arm and the second arm. The wheel assembly is provided with a fixing rod, and the fixing rod is rotatably connected to the first connection hole. One end of the first arm away from the first connection hole is a free end, and one end of the second arm away from the first connection hole is rotatably connected to the push rod.

[0014] Further, the driving member is provided with a connecting ear, and the fixing rod is connected to the connecting ear.

[0015] Further, the connecting ear is provided with a second connection hole, one end of the fixing rod away from the first connection hole is provided with a third connection hole, and the second connection hole and the third connection hole are rotatably connected by a rotating shaft.

[0016] Further, the floating part is provided with a wheel limiting member, and the wheel limiting member includes a first fixing plate and a second fixing plate arranged at intervals. The wheel is arranged between the first fixing plate and the second fixing plate, and both ends of the shaft of the wheel are respectively connected to the first fixing plate and the second fixing plate.

[0017] Further, the driving member includes a motor and a lead screw. One end of the lead screw is connected to the driving member, and the other end is connected to the driving arm.

[0018] In a second aspect, the present invention further provides an operating table base, including the wheel assembly as described in any item of the first aspect and a bottom. The bottom is provided with an installation groove, the fixing part of the wheel assembly is fixed in the installation groove, and the floating part of the wheel assembly is arranged in the installation groove and moves up or down along the installation groove.

[0019] In a third aspect, the present invention further provides an operating table, including the wheel assembly as described in any item of the first aspect, or including the operating table base as described in the second aspect;

[0020] The operating table further includes a controller, and the controller is electrically connected to the driving member.

[0021] Compared with the prior art, the beneficial effects of the wheel assembly in the present utility model are as follows: The wheel assembly includes a wheel, a floating part, a fixing part, and a driving device. The wheel is fixedly connected to the floating part; the fixing part is connected to the floating part through an elastic member and is provided with an avoidance groove. The driving device includes a driving arm and a driving member. One end of the driving arm is connected to the driving member, and the other end is a free end, and the free end corresponds to the position of the avoidance groove. The driving member is used to drive the driving arm to pass through the avoidance groove to press the floating part, so that the floating part drives the wheel to move downward. When the wheel assembly needs to move, the driving arm passes through the avoidance groove to press the floating part, so that the wheel contacts the ground and the wheel can slide. When the wheel assembly needs to brake, the driving member is used to drive the driving arm to rise, and the floating part rises under the action of the elastic member, thereby driving the wheel to rise away from the ground, so as to avoid the vehicle from sliding under the action of force, and further solve the technical problem that the wheel still slides or rolls after braking. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of the wheel assembly in an embodiment of the present utility model;

[0023] Figure 2 is another schematic structural diagram of the wheel assembly in an embodiment of the present utility model;

[0024] Figure 3 is a schematic assembly structural diagram of the wheel assembly in an embodiment of the present utility model;

[0025] Figure 4 is a schematic assembly structural diagram of the driving device in an embodiment of the present utility model;

[0026] Figure 5 is a schematic structural diagram of the operating table base in an embodiment of the present utility model;

[0027] Figure 6 is a sectional view taken along line A-A of the operating table base in an embodiment of the present utility model;

[0028] Figure 7 is a sectional view taken along line B-B of the operating table base in an embodiment of the present utility model.

[0029] In the accompanying drawings, each reference numeral represents: 1, wheel assembly; 11, wheel; 12, floating part; 122, wheel position limiter; 1221, first fixing plate; 1222, second fixing plate; 13, fixing part; 131, elastic member; 132, avoidance groove; 133, limit post; 14, driving device; 141, driving arm; 1411, free end; 1412, first arm; 1413, second arm; 1414, first connection hole; 142, driving member; 1421, cylinder block; 1422, push rod; 1423, connecting ear; 1424, second connection hole; 15, fixing rod; 151, third connection hole; 2, operating table base; 21, bottom; 211, installation groove. Detailed implementation manners

[0030] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0033] In the prior art, a brake pad is provided in the wheel of the wheel assembly. When the operating bed needs to be braked, the brake pad contacts the wheel to form a large frictional force with the wheel, so that the wheel stops rolling. However, the wheel after braking will slide under the action of force, or the brake pad becomes loose, and the wheel will still slide, so that the operating bed after braking still moves.

[0034] In view of the above problems, the present utility model proposes a wheel assembly 1. When the wheel assembly 1 needs to be moved, the driving arm 141 passes through the avoidance groove 132 to press the floating part 12, so that the wheel 11 contacts the ground and the wheel 11 can slide. When the wheel assembly 1 needs to be braked, the driving member 142 is used to drive the driving arm 141 to rise, and the floating part 12 rises under the action of the elastic member 131, thereby driving the wheel 11 to rise away from the ground, so as to avoid the vehicle from sliding under the action of force, and further solve the technical problem that the wheel 11 still slides or rolls after braking.

[0035] As shown in the Figures 1-3 accompanying Figure 1 drawings, Figure 2 FIG. 1 is a schematic structural view of the wheel assembly in an embodiment of the present utility model, Figure 3 FIG. 2 is another schematic structural view of the wheel assembly in an embodiment of the present utility model, and

[0036] FIG. 3 is an assembled structural view of the wheel assembly in an embodiment of the present utility model. It can be seen from the figure that the wheel assembly 1 includes a wheel 11, a floating part 12, a fixing part 13 and a driving device 14.

[0037] The wheel 11 is fixedly connected to the floating part 12. The floating part 12 is used to carry the wheel 11 to drive the wheel 11 to move downward and contact the ground under the drive of the driving device 14. Specifically, the base of the operating bed is provided with an installation groove 211 for accommodating the wheel 11. When the wheel 11 is in the installation groove 211, the wheel 11 does not contact the ground. At this time, the bottom surface of the base contacts the ground, and the area of the bottom surface is large, and the frictional force with the ground is large, and the bottom surface is not easy to slide on the ground, so that the movement of the operating bed can be prevented.

[0038] The fixed part 13 and the floating part 12 are connected by an elastic member 131, and an avoidance groove 132 is provided. The fixed part 13 can be fixedly arranged on the base of the operating bed to fix the entire wheel assembly 1. The floating part 12 is connected to the fixed part 13 through the elastic member 131, and the floating part 12 can float relative to the fixed part 13 to realize the floating of the wheel 11 relative to the fixed part 13. When the wheel 11 is in the installation groove 211, the wheel 11 does not contact the ground. When the floating part 12 is driven by the driving device 14 to move downward, the wheel 11 leaves the installation groove 211 and contacts the ground, so that the operating bed can be driven to move when the wheel 11 rolls. When the driving force of the driving device 14 on the floating part 12 disappears, the floating part 12 moves upward under the action of the elastic member 131, thereby driving the wheel 11 to retract into the installation groove 211, and at this time the wheel 11 does not contact the ground. It can be understood that when the floating part 12 is driven by the driving device 14 to move downward, the elastic member 131 is stretched and in a deformed state. When the driving force of the driving device 14 on the floating part 12 disappears, the elastic member 131 returns to its original position under the action of the elastic force, thereby driving the floating part 12 to move upward.

[0039] As shown in the attached Figure 4 figure, the driving device 14 includes a driving arm 141 and a driving member 142. One end of the driving arm 141 is connected to the driving member 142, and the other end is a free end 1411, and the free end 1411 corresponds to the position of the avoidance groove 132. The driving member 142 is used to drive the driving arm 141 to pass through the avoidance groove 132 to press the floating part 12, so that the floating part 12 drives the wheel 11 to move downward. Specifically, when the driving arm 141 presses the floating part 12, the free end 1411 contacts the floating part 12. The driving member 142 can include a motor assembly, a hydraulic cylinder assembly, etc. The avoidance groove 132 is used to avoid the driving arm 141, so that when the fixed part 13 of the wheel assembly 1 is fixedly arranged on the base of the operating bed, the driving arm 141 can pass through the avoidance groove to drive the floating part 12, so that the floating part 12 moves downward relative to the fixed part 13.

[0040] According to the technical solution of the present utility model described above, when the wheel assembly 1 needs to move, the driving arm 141 passes through the avoidance groove 132 to press the floating part 12, so that the wheel 11 contacts the ground and the wheel 11 can slide. When the wheel assembly 1 needs to brake, the driving member 142 is used to drive the driving arm 141 to rise, and the floating part 12 rises under the action of the elastic member 131, thereby driving the wheel 11 to rise and leave the ground, so as to avoid the vehicle from sliding under the action of force, and further solve the technical problem that the wheel 11 still slides or rolls after braking.

[0041] In some embodiments, the fixing part 13 is provided with a limiting post 133, and the floating part 12 is provided with a limiting hole (not marked in the figure). The limiting post 133 is arranged in the limiting hole, and the area of the limiting hole is larger than the cross-sectional area of the limiting post 133. The limiting post 133 is used to limit the moving direction of the floating part 12, so that the floating part 12 can move along the limiting post 133 under the action of the driving arm 141 or the elastic member 131, avoiding the deviation of the moving direction of the floating part 12 and preventing the driving wheel from failing to contact the ground or retracting into the installation groove 211.

[0042] In some embodiments, the driving member 142 includes a cylinder block 1421 and a push rod 1422. One end of the push rod 1422 is connected to the cylinder block 1421, and the other end is connected to the driving arm 141. The cylinder block 1421 is a hydraulic cylinder. The hydraulic cylinder lifts the push rod 1422, causing the end of the driving arm 141 connected to the push rod 1422 to rise and the other end (free end 1411) to press down, thereby pressing the wheel 11 against the ground to lift the bed body of the operating bed, so that the operating bed can move through the four wheels. When braking, due to the pressure, the hydraulic oil in the hydraulic cylinder flows back to the fuel tank, driving the push rod 1422 to descend, causing the end of the driving arm 141 connected to the push rod 1422 to descend and the other end (free end 1411) to rise. The acting force of the driving arm 141 on the floating part 12 disappears, and due to the pulling force of the elastic member 131, the floating part 12 causes the wheel 11 to rise. At the same time, the caster wheels retract and the base contacts the ground, thus achieving the braking effect.

[0043] In some embodiments, as shown in the attached Figures 5-7 figure, the wheel assembly 1 is applied to the base 2 of the operating bed. As can be seen from the attached figure, the driving arm 141 includes a connected first arm 1412 and a second arm 1413. The first arm 1412 and the second arm 1413 are arranged at an angle, and the angle is 100° - 160°. With such an arrangement, when the end of the driving arm 141 connected to the push rod 1422 descends, the other end (free end 1411) can rise. Conversely, when the end of the driving arm 141 connected to the push rod 1422 rises, the other end (free end 1411) can descend.

[0044] A first connection hole 1414 is provided at the connection between the first arm 1412 and the second arm 1413. The wheel assembly 1 is provided with a fixing rod 15, and the fixing rod 15 is rotatably connected to the first connection hole 1414. One end of the first arm 1412 away from the first connection hole 1414 is a free end 1411, and one end of the second arm 1413 away from the first connection hole 1414 is rotatably connected to a push rod 1422. The connection between the first connection hole 1414 and the fixing rod 15 enables the driving arm 141 to rotate around the center point of the first connection hole 1414. Using the seesaw-like lever principle, the end of the driving arm 141 connected to the push rod 1422 descends, and the other end (free end 1411) can ascend. Conversely, when the end of the driving arm 141 connected to the push rod 1422 ascends, the other end (free end 1411) can descend.

[0045] In some embodiments, the driving member 142 is provided with a connection ear 1423, and the fixing rod 15 is connected to the connection ear 1423. The connection ear 1423 is fixedly arranged on the driving member 142 and is used to limit the fixing rod 15, so as to prevent the fixing member from moving out of the reasonable range when the driving arm 141 rotates.

[0046] In some embodiments, the connection ear 1423 is provided with a second connection hole 1424, and one end of the fixing rod 15 away from the first connection hole 1414 is provided with a third connection hole 151. The second connection hole 1424 and the third connection hole 151 are rotatably connected by a rotating shaft. The fixing member and the connection ear 1423 can rotate relative to each other, thereby increasing the degree of freedom of rotation of the driving arm 141 and making the rotation of the driving arm 141 more flexible.

[0047] In some embodiments, the floating part 12 is provided with a wheel limiting member 122. The wheel limiting member 122 includes a first fixing plate 1221 and a second fixing plate 1222 arranged at intervals. The wheel 11 is arranged between the first fixing plate 1221 and the second fixing plate 1222, and both ends of the shaft of the wheel 11 are respectively connected to the first fixing plate 1221 and the second fixing plate 1222. The wheel limiting member 122 is used to limit the wheel 11 and connect the shaft of the wheel 11, so that the wheel 11 can roll under the action of force.

[0048] In addition to the hydraulic cylinder assembly, the driving member 142 may also be a motor assembly. In some embodiments, the driving member 142 includes a motor and a lead screw. One end of the lead screw is connected to the driving member 142, and the other end is connected to the driving arm 141. The lead screw can rotate in a first direction or a second direction under the drive of the motor. The lead screw is provided with an external thread, and one end of the driving arm 141 away from the free end 1411 is provided with an internal thread connected to the lead screw. The external thread of the lead screw is connected to the internal thread of the driving arm 141. When the lead screw rotates in the first direction under the drive of the motor, one end of the driving arm 141 away from the free end 1411 rises along the lead screw. When the lead screw rotates in the second direction under the drive of the motor, one end of the driving arm 141 away from the free end 1411 descends along the lead screw. The first direction and the second direction are opposite directions.

[0049] As shown in the attached Figure 5 figure, the present utility model further provides an operating bed base 2. The operating bed base 2 includes the wheel assembly 1 as described in any one of the above embodiments and a bottom 21. The bottom 21 is provided with a mounting groove 211. The fixing portion 13 of the wheel assembly 1 is fixed in the mounting groove 211, and the floating portion 12 of the wheel assembly 1 is disposed in the mounting groove 211 and moves up or down along the mounting groove 211. When the floating portion 12 moves up along the mounting groove 211, the wheel 11 retracts into the mounting groove 211, and at this time the wheel 11 does not contact the ground. When the floating portion 12 moves down along the mounting groove 211, the wheel 11 protrudes from the mounting groove 211, and at this time the wheel 11 contacts the ground. The structure and its beneficial effects of the wheel assembly 1 have been described in detail in the above embodiments. Since the operating bed base 2 includes the wheel assembly 1, it includes the structure and its beneficial effects in the above embodiments. For the sake of brevity of the application text, it will not be repeated here.

[0050] The present utility model further provides an operating bed. The operating bed includes the wheel assembly 1 as described in any one of the above embodiments, or includes the operating bed base 2 as described in the above embodiments. The operating bed further includes a controller, and the controller is electrically connected to the driving member 142 for controlling the operation of the driving member 142, so as to press down the floating portion 12 by the driving arm 141 or raise the driving arm 141 to release the floating portion 12. Exemplarily, the operating bed is provided with an operating bed base 2, and the wheel assembly 1 is disposed on the operating bed base 2. In another example, the wheel assembly 1 is directly disposed at the bottom 21 of the operating bed. The structure and its beneficial effects of the wheel assembly 1 have been described in detail in the above embodiments. Since the operating bed includes the wheel assembly 1, it includes the structure and its beneficial effects in the above embodiments. For the sake of brevity of the application text, it will not be repeated here.

[0051] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A wheel assembly, characterized in that: include: wheel; A floating part, the wheel is fixedly connected to the floating part; A fixed part, connected to the floating part through an elastic member and provided with an escape groove; The driving device includes a driving arm and a driving member, wherein one end of the driving arm is connected to the driving member, and the other end is a free end, and the free end corresponds to the position of the avoidance groove. The driving member is used to drive the driving arm to pass through the avoidance groove to press the floating part, so that the floating part drives the wheel to move downward.

2. The wheel assembly according to claim 1, characterized in that: The fixing part is provided with a limiting column, the floating part is provided with a limiting hole, the limiting column is arranged in the limiting hole, and the area of ​​the limiting hole is larger than the cross-sectional area of ​​the limiting column.

3. The wheel assembly according to claim 1, characterized in that: The driving member comprises a cylinder body and a push rod, one end of the push rod is connected to the cylinder body, and the other end of the push rod is connected to the driving arm.

4. The wheel assembly according to claim 3, characterized in that: The driving arm comprises a first arm and a second arm connected to each other, the first arm and the second arm are arranged at an angle, and the angle is 100°-160°; A first connecting hole is provided at the connection between the first arm and the second arm, and the wheel assembly is provided with a fixing rod, the fixing rod is rotatably connected to the first connecting hole, the end of the first arm away from the first connecting hole is a free end, and the end of the second arm away from the first connecting hole is rotatably connected to the push rod.

5. The wheel assembly according to claim 4, characterized in that: The driving member is provided with a connecting ear, and the fixing rod is connected to the connecting ear.

6. The wheel assembly according to claim 5, characterized in that: The connecting ear is provided with a second connecting hole, and the fixing rod is provided with a third connecting hole at one end away from the first connecting hole. The second connecting hole and the third connecting hole are rotatably connected via a rotating shaft.

7. The wheel assembly according to claim 1, characterized in that: The floating part is provided with a wheel stopper, which includes a first fixing plate and a second fixing plate arranged at an interval, the wheel is arranged between the first fixing plate and the second fixing plate, and both ends of the wheel shaft are respectively connected to the first fixing plate and the second fixing plate.

8. The wheel assembly according to claim 1, characterized in that: The driving member comprises a motor and a lead screw, one end of the lead screw is connected to the driving member, and the other end of the lead screw is connected to the driving arm.

9. An operating table base, characterized in that: It comprises a wheel assembly as described in any one of claims 1 to 8 and a bottom, wherein the bottom is provided with a mounting groove, a fixed portion of the wheel assembly is fixed in the mounting groove, and a floating portion of the wheel assembly is arranged in the mounting groove and moves upward or downward along the mounting groove.

10. An operating table, characterized in that: A wheel assembly comprising any one of claims 1 to 8, or a surgical bed base comprising claim 9; The operating bed also includes a controller, which is electrically connected to the driving member.

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