Vibration frame with improved rolling ball module

Abstract

The utility model discloses a vibration frame with an improved rolling ball module. The vibration frame comprises a first frame body and a second frame body, wherein the first frame body is placed on an external bearing surface; the second frame body is arranged on the first frame body in a reciprocating motion manner; the device further comprises a rolling ball module and a driving mechanism, the second frame body is arranged on the first frame body in a reciprocating motion mode through the rolling ball module, the driving mechanism is arranged on the first frame body, and the output end of the driving mechanism is connected with the second frame body and used for driving the second frame body to do reciprocating motion relative to the first frame body. The rolling ball module comprises a fixed seat, a shaft rod and a plurality of rolling pieces, the fixed seat is arranged on the first frame body, the shaft rod is in rolling fit with the fixed seat through the rolling pieces, the shaft rod is connected with the second frame body and is arranged on the fixed seat through the rolling pieces in a rolling mode, and the fixed seat is provided with a containing cavity used for containing the shaft rod and the rolling pieces; a plurality of rolling members are disposed around the shaft. By means of the structure, noise of the vibration frame in the using process is reduced, and abrasion between parts in the vibration device is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, and in particular discloses a vibration frame with an improved rolling ball module. Background Art

[0002] At present, some medical devices such as medical beds are usually equipped with vibration devices, which are configured to drive the main body of the user, such as the bed board, the seat, etc., to move forward and backward, so that the device can play a certain health care role and improve the practicality and functionality of the device. The vibration device usually includes a fixed frame and a mobile frame that is reciprocatingly arranged on the fixed frame. A ball module is usually arranged between the two components to reduce friction. However, due to the unreasonable structural design of the ball module in the prior art, it is very easy to cause the vibration device to have problems such as loud noise, severe wear, and uneven vibration during operation. Utility Model Content

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the utility model is to provide a vibration frame with an improved rolling ball module to solve the problems of high working noise and severe wear of the vibration device in the prior art.

[0004] To achieve the above-mentioned purpose, the utility model provides a vibration frame with an improved ball module, including a first frame body for being placed on an external bearing surface, and a second frame body reciprocatingly arranged on the first frame body; it also includes a ball module and a driving mechanism, the second frame body is reciprocatingly arranged on the first frame body via the ball module, the driving mechanism is arranged on the first frame body, the output end of the driving mechanism is connected to the second frame body and is used to drive the second frame body to reciprocate relative to the first frame body; the ball module includes a fixed seat, an axle and a plurality of rolling members, the fixed seat is arranged on the first frame body, the axle rod and the fixed seat are rollingly matched via the rolling members, the axle rod is connected to the second frame body and is rollingly arranged on the fixed seat via the rolling members, the fixed seat has a accommodating cavity for accommodating the axle rod and the rolling members, and the plurality of rolling members are arranged around the axle rod.

[0005] Furthermore, the fixing seat and / or the shaft rod has a guide track for guiding the movement of the rolling element, the guide track is communicated with the accommodating cavity, and the rolling element is arranged in the guide track for rolling.

[0006] Furthermore, there are multiple guide rails, which are arranged in a ring array around the central axis of the shaft.

[0007] Furthermore, the fixing seat is recessed from the inner wall of the accommodating cavity to form a first groove, and the shaft rod is recessed from the outer wall to form a second groove. The first groove and the second groove are the guide rails, and the two ends of the rolling element are rollingly accommodated in the first groove and the second groove.

[0008] Furthermore, there are multiple rolling elements in each guide track, and the multiple rolling elements are arranged along the length direction of the guide track.

[0009] Furthermore, both ends of the fixing seat are provided with limit baffles, and the limit baffles are used to stop and resist the rolling element to limit the rolling element in the accommodating cavity.

[0010] Furthermore, two limit connecting members are arranged on the second frame, and the two limit connecting members are respectively located at two ends of the shaft rod far away from each other, and the shaft rod is connected to the second frame via the limit connecting members; the side walls of the limit connecting members are used to contact with the fixed seat to limit the displacement distance of the shaft rod.

[0011] Furthermore, the rolling ball modules are provided in a plurality of groups, and the plurality of rolling ball modules are arranged along the length direction and / or the width direction of the first frame.

[0012] Furthermore, the driving mechanism includes a driving motor, a first transmission group, an eccentric wheel and a vibration arm; the output shaft of the driving motor is connected to the eccentric wheel via the first transmission group to drive the eccentric wheel to rotate, one end of the vibration arm is provided with an annular connecting part, the eccentric wheel is rotationally connected to the connecting part, and the other end of the vibration arm is connected to the second frame, the first transmission group includes a first pulley and a second pulley connected to the first pulley, the outer diameter of the first pulley is smaller than the outer diameter of the second pulley, the output shaft of the driving motor is connected to the first pulley, and the eccentric wheel is connected to the second pulley.

[0013] Furthermore, the driving mechanism also includes a second transmission group, and the driving motor drives the eccentric wheel to rotate via the first transmission group and the second transmission group. The second transmission group includes a third pulley and a fourth pulley, and the third pulley and the fourth pulley are coaxially connected in rotation; the first pulley is connected to the third pulley in transmission, and the fourth pulley is connected to the second pulley in transmission, the outer diameter of the first pulley is equal to the outer diameter of the fourth pulley, and the outer diameter of the second pulley is smaller than the outer diameter of the third pulley.

[0014] Beneficial effects of the utility model: the ball module of the utility model includes a fixed seat, an axle and a plurality of rolling elements, the fixed seat is arranged on the first frame, the axle rolls with the fixed seat via the rolling element, the axle is connected to the second frame and is rolled on the fixed seat via the rolling element, the fixed seat has a receiving cavity for accommodating the axle and the rolling element, and a plurality of rolling elements are arranged around the axle. By arranging the rolling element around the axle, the fixed seat sleeve is arranged on the axle, and the design of a plurality of rows of balls in a ring-shaped array along the central axis of the axle makes it possible to reduce the friction between each surface of the axle body and the fixed seat when the axle body moves back and forth, thereby reducing the noise of the vibration frame during use, reducing the wear between the components in the vibration device, ensuring a more balanced vibration of the vibration frame, improving the reliability of the product, and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the vibration frame of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the roller ball module of the utility model in an exploded state;

[0017] Figure 3 It is a structural schematic diagram of the driving mechanism and the first transmission group of the utility model;

[0018] Figure 4 It is a schematic diagram of the exploded state structure of the driving mechanism and the first transmission group of the utility model;

[0019] Figure 5 It is a structural schematic diagram of the drive motor of the utility model in cooperation with the first transmission group and the second transmission group;

[0020] Figure 6 It is a schematic structural diagram of the driving mechanism and the second transmission assembly of the utility model.

[0021] Reference numerals include:

[0022] 1. First frame; 2. Second frame; 3. Rolling ball module; 4. Driving mechanism; 5. Support foot; 6. Connecting frame; 11. Support plate; 20. Linking member; 21. Limit connecting member; 30. Accommodating chamber; 31. Fixed seat; 32. Shaft; 33. Rolling member; 34. Limit baffle; 311. First groove; 321. Second groove; 322. Threaded connecting rod; 41. Driving motor; 42. First transmission group; 43. Eccentric wheel; 44. Vibrating arm; 420. Toothed belt; 421. First pulley; 422. Second pulley; 441. Connecting part; 45. Second transmission group; 451. Third pulley; 452. Fourth pulley. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0024] See also Figures 1 to 6As shown, the utility model is a vibration frame with an improved rolling ball module, including a first frame 1 for being placed on an external bearing surface, and a second frame 2 reciprocatingly arranged on the first frame 1; it also includes a rolling ball module 3 and a driving mechanism 4, the second frame 2 is reciprocatingly arranged on the first frame 1 via the rolling ball module 3, the driving mechanism 4 is arranged on the first frame 1, the output end of the driving mechanism 4 is connected to the second frame 2 and is used to drive the second frame 2 to reciprocate relative to the first frame 1; the rolling ball module 3 includes a fixed seat 31, a shaft 32 and a plurality of rolling members 33, the fixed seat 31 is arranged on the first frame 1, the shaft 32 is rollingly matched with the fixed seat 31 via the rolling member 33, the shaft 32 is connected to the second frame 2 and is rollingly arranged on the fixed seat 31 via the rolling member 33, the fixed seat 31 has a accommodating cavity 30 for accommodating the shaft 32 and the rolling member 33, and the plurality of rolling members 33 are arranged around the shaft 32.

[0025] In this embodiment, the first frame 1 and the second frame 2 are both rectangular parallelepiped, and a plurality of supporting feet 5 are arranged at the bottom of the first frame 1. When actually used, the supporting feet 5 can be universal wheels, etc.; a supporting plate 11 is installed on the first frame 1, and the driving mechanism 4 is fixedly installed on the supporting plate 11. The fixing seat 31 in the ball module 3 is detachably connected to the first frame 1 through the fastening cooperation of bolts and nuts, the rolling member 33 is a ball made of silicone material, and the shaft 32 is rollingly matched with the fixing seat 31 through the ball. The shape of the fixing seat 31 is roughly rectangular parallelepiped, and the longitudinal ends of the shaft 32 are provided with threaded connecting rods 322. The second frame 2 is fixedly connected to the shaft 32 through the screw connection of nuts and threaded connecting rods 322. When in use, the output end of the driving mechanism 4 is connected to and drives the second frame 2 to reciprocate. The second frame 2 reduces the friction between the first frame 1 by means of the rolling cooperation of the shaft member and the fixing seat 31, so as to achieve the stable vibration of the vibration frame.

[0026] Specifically, the fixed seat 31 and / or the shaft 32 have a guide track for guiding the movement of the rolling element 33, the guide track is connected to the accommodating cavity 30, and the rolling element 33 is arranged in the guide track. In this embodiment, the fixed seat 31 and the shaft 32 both have guide tracks, and the balls roll in the guide tracks; the purpose of setting the guide tracks on the fixed seat 31 and the shaft 32 is to guide the rolling balls more fully. If only the guide tracks are set on the fixed seat 31 or the shaft 32, there may be some errors in the movement path of the balls, thereby affecting the working state of the ball module 3.

[0027] Specifically, the number of the guide rails is multiple, and the multiple guide rails are arranged in a circular array around the central axis of the shaft 32. In this embodiment, four guide rails are provided, and the four guide rails are arranged in a circular array around the central axis of the shaft 32. The shape of the shaft 32 can be square or cylindrical. In this embodiment, the shape of the shaft 32 is cylindrical. Compared with the square design, the cylindrical shaft 32 has a greater structural strength during the vibration of the vibration frame, and can evenly disperse the weight of the second frame 2 itself and the person or object carried by it, and prevent the shaft body from deformation.

[0028] Specifically, the fixing seat 31 is recessed from the inner wall of the accommodating cavity 30 to form a first groove 311, and the shaft rod 32 is recessed from the outer wall to form a second groove 321. The first groove 311 and the second groove 321 are the guide rails, and the two ends of the rolling element 33 are rollingly accommodated in the first groove 311 and the second groove 321. In this embodiment, the first groove 311 and the second groove 321 are both arc grooves in the shape of a minor arc. The two arc grooves clamp the rolling element 33 to further limit the moving path of the rolling element 33, thereby improving the smoothness of the rolling element 33 when rolling.

[0029] In this embodiment, the number of first grooves 311 and second grooves 321 is correspondingly set to four. The four first grooves 311 are arranged in a circular array around the central axis of the fixed seat 31, and the four second grooves 321 are arranged in a circular array around the central axis of the shaft rod 32, so that the friction between each surface of the shaft rod 32 and the fixed seat 31 is reduced when moving, further improving the working efficiency of the ball module 3.

[0030] Specifically, the number of the rolling elements 33 in each guide track is multiple, and the multiple rolling elements 33 are arranged along the length direction of the guide track. In this embodiment, two rolling elements 33 are arranged in each guide track (i.e., each groove). In actual production, 3, 4, 5, or 6 rolling elements 33 can be arranged in each groove, and specific adjustments can be made according to actual use. In this embodiment, two rolling elements 33 are arranged in each groove to ensure the normal operation of the ball module 3 and to a certain extent optimize the production cost.

[0031] Specifically, both ends of the fixing seat 31 are provided with limit baffles 34, which are used to stop and abut the rolling element 33 to limit the rolling element 33 in the accommodating cavity 30. The limit baffles 34 are connected to the fixing seat 31 through detachable fasteners, and all the rolling elements 33 are encapsulated in the accommodating cavity 30 of the fixing seat 31 through the limit baffles 34, so as to avoid the phenomenon that the rolling element 33 falls out of the accommodating cavity 30 and causes the rolling ball module 3 to stop working, thereby extending the service life of the rolling ball module 3 and ensuring the normal operation of the vibration frame.

[0032] Specifically, two limit connectors 21 are provided on the second frame 2, and the two limit connectors 21 are respectively located at two ends of the shaft 32 that are far away from each other. The shaft 32 is connected to the second frame 2 via the limit connectors 21; the side wall of the limit connector 21 is used to block and abut against the fixing seat 31 to limit the displacement distance of the shaft 32. The limit connector 21 in this embodiment is extended in a direction perpendicular to the length direction of the second frame 2, and the limit connector 21 is detachably connected to the shaft 32 through the tightening fit of the threaded connecting rod 322 and the nut. The limit connector 21 is movably installed on the second frame 2. In actual use, the displacement distance of the second frame 2 can be adjusted by adjusting the distance between the two limit connectors 21.

[0033] Specifically, the ball modules 3 are provided in multiple groups, and the multiple groups of ball modules 3 are arranged along the length direction and / or width direction of the first frame 1. In this embodiment, there are 4 groups of ball modules 3, and the 4 groups of ball modules 3 are arranged in pairs at both ends of the length direction and width direction of the first frame 1, so that when the second frame 2 moves relative to the first frame 1, the forces applied to the fixing seat 31 by each part are balanced, further ensuring the stability of the vibration frame. In actual use, the number of ball modules 3 can be 2 groups, 6 groups, or 8 groups, etc.

[0034] Specifically, the driving mechanism 4 includes a driving motor 41, a first transmission group 42, an eccentric wheel 43 and a vibration arm 44; the output shaft of the driving motor 41 is connected to the eccentric wheel 43 via the first transmission group 42 to drive the eccentric wheel 43 to rotate, one end of the vibration arm 44 is provided with an annular connecting portion 441, the eccentric wheel 43 is rotatably connected to the connecting portion 441, a linkage member 20 is provided on the second frame 2, one end of the linkage member 20 is fixedly connected to the second frame 2, and the other end of the linkage member 20 is rotatably connected to the vibration arm 44, the first transmission group 42 includes a first pulley 421, a second pulley 422 connected to the first pulley 421, the outer diameter of the first pulley 421 is smaller than the outer diameter of the second pulley 422, the output shaft of the driving motor 41 is connected to the first pulley 421, and the eccentric wheel 43 is connected to the second pulley 422.

[0035] The driving motor 41 directly drives the eccentric wheel 43 to rotate through the two pulleys in the first transmission group 42, and the rotation of the output shaft of the driving motor 41 is converted into the linear displacement of the vibration arm 44 through the eccentric rotation of the eccentric wheel 43. This structure can achieve the change of the speed ratio by changing the diameter ratio of the two pulleys, that is, adjusting the speed and torque of the output shaft. The smaller driving pulley (the first pulley 421) and the larger driven pulley (the second pulley 422) are combined, which can reduce the speed of the driving motor 41 and increase the torque at the same time. In this embodiment, the first pulley 421 and the second pulley 422 are connected by a toothed belt 420. The toothed belt 420 has good buffering and shock absorption capabilities, which can reduce impact and vibration in the process of transmitting motion and force, so that the operation of the eccentric wheel 43 is more stable. In addition, the use of the toothed belt 420 can significantly reduce the operating noise, and has good wear resistance, high transmission efficiency, and a long service life.

[0036] Specifically, the driving mechanism 4 also includes a second transmission group 45, and the driving motor 41 drives the eccentric wheel 43 to rotate via the first transmission group 42 and the second transmission group 45. The second transmission group 45 includes a third pulley 451 and a fourth pulley 452, and the third pulley 451 and the fourth pulley 452 are coaxially connected in rotation; the first pulley 421 is connected in transmission with the third pulley 451, and the fourth pulley 452 is connected in transmission with the second pulley 422, the outer diameter of the first pulley 421 is equal to the outer diameter of the fourth pulley 452, and the outer diameter of the second pulley 422 is smaller than the outer diameter of the third pulley 451.

[0037] This structure allows the speed ratio to be finely adjusted through the diameter ratio between multiple pulleys, thereby achieving more complex speed and torque conversion. Since the second pulley 422 and the third pulley 451 are coaxially connected, and the diameters of the first pulley 421 and the third pulley 451 are the same, this arrangement maintains the consistency of the rotation direction between the drive motor 41 and the eccentric wheel 43, and at the same time achieves speed and torque conversion by adjusting the pulley diameter ratio. At the same time, by adding the second transmission group 45, the length and layout flexibility of the transmission chain can also be increased according to the spatial layout requirements of the actual device, providing greater flexibility in mechanical layout and spatial configuration. In this embodiment, a connecting frame is provided on the second frame 2, and the connecting frame is used to be fixedly connected to the external bed board. The driving mechanism 4 drives the second frame 2 to vibrate and then drives the external bed board, the person or object carried on the bed board to vibrate.

[0038] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A vibration frame with an improved rolling ball module, comprising a first frame (1) for placement on an external bearing surface, and a second frame (2) reciprocatingly arranged on the first frame (1); characterized in that: It also comprises a rolling ball module (3) and a driving mechanism (4), wherein the second frame (2) is arranged on the first frame (1) for reciprocating movement via the rolling ball module (3), and the driving mechanism (4) is arranged on the first frame (1), and an output end of the driving mechanism (4) is connected to the second frame (2) and is used to drive the second frame (2) to reciprocate relative to the first frame (1); The ball rolling module (3) comprises a fixed seat (31), an axle (32) and a plurality of rolling members (33); the fixed seat (31) is arranged on a first frame (1); the axle (32) and the fixed seat (31) are rollingly matched via the rolling members (33); the axle (32) is connected to a second frame (2) and is rollingly arranged on the fixed seat (31) via the rolling members (33); the fixed seat (31) has a receiving cavity (30) for accommodating the axle (32) and the rolling members (33); and the plurality of rolling members (33) are arranged around the axle (32).

2. A vibration frame with an improved rolling ball module according to claim 1, characterized in that: The fixing seat (31) and / or the shaft (32) have a guide track for guiding the movement of the rolling element (33); the guide track is communicated with the accommodating cavity (30); and the rolling element (33) is rollingly accommodated in the guide track.

3. A vibration frame with an improved rolling ball module according to claim 2, characterized in that: There are multiple guide rails, which are arranged in a circular array around the central axis of the shaft (32).

4. The vibration frame with an improved rolling ball module according to claim 2, characterized in that: The fixing seat (31) is recessed from the inner wall of the accommodating cavity (30) to form a first groove (311), and the shaft rod (32) is recessed from the outer wall to form a second groove (321). The first groove (311) and the second groove (321) are the guide rails, and the two ends of the rolling element (33) are rollingly accommodated in the first groove (311) and the second groove (321).

5. The vibration frame with an improved rolling ball module according to claim 2, characterized in that: There are multiple rolling elements (33) in each guide track, and the multiple rolling elements (33) are arranged in an array along the length direction of the guide track.

6. The vibration frame with an improved rolling ball module according to claim 2, characterized in that: Both ends of the fixing seat (31) are provided with limiting baffles (34), and the limiting baffles (34) are used to stop and abut the rolling element (33) to limit the rolling element (33) in the accommodating cavity (30).

7. The vibration frame with an improved rolling ball module according to claim 1, characterized in that: The second frame (2) is provided with two limit connecting members (21), the two limit connecting members (21) are respectively located at two ends of the shaft (32) that are away from each other, and the shaft (32) is connected to the second frame (2) via the limit connecting members (21); the side walls of the limit connecting members (21) are used to block and abut against the fixing seat (31) to limit the displacement distance of the shaft (32).

8. The vibration frame with an improved rolling ball module according to claim 1, characterized in that: The rolling ball modules (3) are arranged in multiple groups, and the multiple groups of rolling ball modules (3) are arranged along the length direction and / or the width direction of the first frame (1).

9. The vibration frame with an improved rolling ball module according to claim 1, characterized in that: The driving mechanism (4) comprises a driving motor (41), a first transmission group (42), an eccentric wheel (43) and a vibration arm (44); the output shaft of the driving motor (41) is connected to the eccentric wheel (43) via the first transmission group (42) to drive the eccentric wheel (43) to rotate; one end of the vibration arm (44) is provided with an annular connecting portion (441); the eccentric wheel (43) is rotatably connected to the connecting portion (441); a linkage member (20) is provided on the second frame (2); the linkage member ( One end of the linkage member (20) is fixedly connected to the second frame (2), the other end of the linkage member (20) is rotatably connected to the other end of the vibration arm (44), the first transmission group (42) includes a first pulley (421) and a second pulley (422) transmission-connected to the first pulley (421), the outer diameter of the first pulley (421) is smaller than the outer diameter of the second pulley (422), the output shaft of the drive motor (41) is connected to the first pulley (421), and the eccentric wheel (43) is connected to the second pulley (422).

10. A vibration frame with an improved rolling ball module according to claim 9, characterized in that: The driving mechanism (4) also includes a second transmission group (45), and the driving motor (41) drives the eccentric wheel (43) to rotate via the first transmission group (42) and the second transmission group (45), and the second transmission group (45) includes a third pulley (451) and a fourth pulley (452), and the third pulley (451) and the fourth pulley (452) are coaxially connected in rotation; the first pulley (421) is connected in transmission with the third pulley (451), and the fourth pulley (452) is connected in transmission with the second pulley (422), the outer diameter of the first pulley (421) is equal to the outer diameter of the fourth pulley (452), and the outer diameter of the second pulley (422) is smaller than the outer diameter of the third pulley (451).

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