CN209977157U

CN209977157U - Gravity balancing device

Info

Publication number: CN209977157U
Application number: CN201920785633.6U
Authority: CN
Inventors: 徐明春; 胡跃萍
Original assignee: Shanghai Weiguan Medical Technology Co Ltd
Current assignee: Shanghai Weiguan Medical Technology Co Ltd
Priority date: 2019-05-29
Filing date: 2019-05-29
Publication date: 2020-01-21
Anticipated expiration: 2029-05-29

Abstract

A gravity balancing device comprises a frame, a balancing weight, a lever and a power input component, wherein the balancing weight is slidably arranged on the frame along the vertical direction; the lever comprises a first arm and a second arm, the joint of the first arm and the second arm is hinged to the rack, the tail end of the first arm is fixed to the rack, the tail end of the second arm is connected to the balancing weight through the force application piece, and the force arm of the second arm is not smaller than that of the first arm; the power input component drives the slip of balancing weight under manual drive device or power pack's drive, the utility model discloses a gravity balance device passes through the first arm of lever and the arm of force length ratio of second arm, and the deflection of elastic component is less when realizing that the balancing weight has great displacement, consequently, makes the elastic component provide a relatively stable pulling force, and balancing weight self gravity is also relatively invariable simultaneously, consequently drives the power input component's power also relatively invariable, and convenience of customers operates, avoids driving power to change and showing the change according to the displacement of balancing weight.

Description

Gravity balancing device

Technical Field

The utility model relates to a balancing unit, concretely relates to gravity balancing unit.

Background

Currently, the following methods are mostly adopted for balancing the weight of an exercising object in the market:

the mode of the balancing weight is adopted, the balancing effect is general, the requirement on the installation position of the balancing weight is strict, and particularly, the balancing cannot be well carried out when the weight of an object changes;

the balance is realized by adopting a spring with a complex mechanism and a cam mechanism, and the method has the defects of complex cam manufacturing, complex whole mechanism, higher cost, complex installation and larger requirement on space. Therefore, there is a need for a gravity balancing device that solves or at least mitigates the above mentioned problems.

Disclosure of Invention

The utility model discloses a solve the above-mentioned problem that prior art exists, provide a gravity balance device, the arm of force length through the first arm of lever and second arm compares, and the deflection of elastic component is less when realizing that the balancing weight has great displacement, consequently for the elastic component can provide a relatively stable pulling force, and balancing weight self gravity is also relatively invariable simultaneously, consequently the power (manual or power pack) of drive power input component is also relatively invariable.

To achieve the above object, there is disclosed a gravity balance device comprising: a frame; the counterweight block is slidably mounted on the rack along the vertical direction; the lever comprises a first arm and a second arm, the joint of the first arm and the second arm is hinged to the rack, the tail end of the first arm is fixed to the rack through an elastic part, the tail end of the second arm is connected to the balancing weight through a force application part so as to lift the balancing weight upwards, and the force arm of the second arm is not smaller than that of the first arm; and a power input member for driving the sliding of the weight block under the driving of the manual driving device or the power unit.

As an optimal technical scheme of the utility model, the end of first arm articulates there is first connecting piece, the connecting piece with the first end of elastic component is fixed, the second end of elastic component is fixed extremely the frame.

As the utility model discloses a preferred technical scheme, the frame includes the base, be fixed with first supporting seat on the base, the elastic component is fixed in through the universal joint first supporting seat.

As the utility model discloses a preferred technical scheme, the universal joint with first supporting seat passes through the second connecting piece to be fixed to first supporting seat, the first end of second connecting piece is fixed in the universal joint, the second end of second connecting piece is fixed in first supporting seat, and the second connecting piece is fixed to the position of first supporting seat is adjustable.

As the utility model discloses a preferred technical scheme, the second connecting piece includes connecting bolt and adjusting nut, connecting bolt's first end is passed and is set up behind the through-hole of first supporting seat by adjusting nut locks, connecting bolt's second end with the universal joint is fixed.

As an optimal technical scheme of the utility model, the frame still includes second supporting seat and carriage, the second supporting seat with the carriage all is fixed in the base, the lever articulate in the second supporting seat, the balancing weight is followed carriage slidable ground sets up, the vertical setting of carriage.

As the utility model discloses a preferred technical scheme, force application piece includes belt and fixed pulley, the first end of belt is fixed in the end of second arm, the belt walks around be connected to behind the fixed pulley the balancing weight, the fixed pulley is fixed in the upper end of carriage.

As the utility model discloses a preferred technical scheme, force application piece is still including rotating cover and fixed axle, the fixed axle is fixed in the end of second arm, rotate the cover rotationally install in the fixed axle.

As a preferred technical solution of the present invention, the power input member includes: the hand wheel is rotatably arranged on the frame; the offset pin shaft is fixed on one side, facing the balancing weight, of the hand wheel, and is not coaxial with the hand wheel; and the stress groove is arranged on the balancing weight, the stress groove is horizontally arranged, the offset pin shaft is arranged in the stress groove in a sliding manner, and the distance from the axis of the offset pin shaft to the axis of the hand wheel is smaller than the distance from the axis of the hand wheel to two ends of the stress groove.

As an optimal technical scheme of the utility model, fixedly connected with crank in the axis of rotation of hand wheel, articulate distal end is fixed with the biasing round pin axle.

The utility model discloses a can reach following beneficial effect: the deformation of the elastic part is smaller when the balancing weight has larger displacement through the length ratio of the force arms of the first arm and the second arm of the lever, so that the elastic part can provide relatively stable pulling force, and meanwhile, the gravity of the balancing weight is relatively constant, so that the force (manual or power unit) for driving the power input component is relatively constant, the operation of a user is facilitated, and the driving force is prevented from being obviously changed according to the displacement change of the balancing weight; the power input component can be driven by a manual driving device or a power unit, namely, can be driven by hands or other powers, so that the utility model has the advantages of wide application range, reduced requirement on driving force, and only need to provide a basically constant driving force, when being driven by hands, the power input component is convenient for users to operate, and when being driven by the power unit, the requirement on the power unit is low (only need the power unit to provide a basically constant driving force, but not need the power unit to provide the driving force with a large fluctuation range), so that the power unit can work stably, and the impact on users and the power unit is reduced; compared with the arrangement of a spring and a cam mechanism, the device has the advantages of simple structure, convenience in use, low design and production cost, low requirement on installation space, basically no abrasion (the working surface of the cam is abraded, the precision is reduced, and even the cam cannot work), and long service life.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic perspective view of an embodiment of the present invention;

FIG. 2 is a schematic perspective view of FIG. 1 from another perspective;

fig. 3 is a schematic view of a three-dimensional structure of the hand wheel after being removed according to an embodiment of the present invention.

In the figure: 1. a frame; 11. a base; 12. a first support base; 13. a second support seat; 14. a carriage; 2. a balancing weight; 21. a stress groove; 3. a lever; 31. a first arm; 32. a second arm; 4. an elastic member; 5. a power input member; 51. a hand wheel; 511. a handle; 512. a rotating shaft of the hand wheel; 52. a crank; 53. offsetting a pin shaft; 6. a first connecting member; 7. a universal joint; 8. a force application member; 81. a belt; 82. a fixed pulley; 83. rotating the sleeve; 84. a fixed shaft; 9. a second connecting member; 91. a connecting bolt; 92. and adjusting the nut.

The purpose of the present invention is to provide a novel and improved method and apparatus for operating a computer.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description. In the preferred embodiments, the terms "upper", "lower", "left", "right", "middle" and "a" are used for the sake of clarity only, and are not intended to limit the scope of the invention, its relative relationship between the terms and their derivatives, and the scope of the invention should be understood as being limited by the claims.

As shown in fig. 1-2, the embodiment of the present invention discloses a gravity balance device, which includes: a frame 1; the balancing weight 2 is slidably mounted on the rack 1 along the vertical direction; the lever 3 comprises a first arm 31 and a second arm 32, the joint of the first arm 31 and the second arm 32 is hinged to the rack 1, the tail end of the first arm 31 is fixed to the rack 1 through an elastic piece 4, the tail end of the second arm 32 is connected to the counterweight block 2 through a force application piece 8 so as to lift the counterweight block 2 upwards, and the force arm of the second arm 32 is not smaller than that of the first arm 31; and a power input member 5 for driving the sliding of the weight block 2 under the driving of a manual driving device or a power unit.

The length ratio of the force arm of the first arm 31 to the second arm 32 of the lever 3 is used for realizing that the deformation of the elastic part 4 is smaller when the balancing weight 2 has larger displacement, so that the elastic part 4 can provide relatively stable pulling force, and meanwhile, the self gravity of the balancing weight 2 is relatively constant, so that the force (manual or power unit) for driving the power input component 5 is relatively constant, the operation of a user is facilitated, and the driving force is prevented from being obviously changed according to the displacement change of the balancing weight 2.

The power input component 5 can be driven by manual drive device or power unit, can be driven by hand or other power promptly, make the utility model discloses a wide range of use reduces the requirement to drive power, only need provide a basic invariable drive power can, when by hand drive, the user operation of being convenient for, when by power unit drive, low to power unit's requirement (only need power unit provide a basic invariable drive power can, and do not need it to provide the very big drive power of fluctuation range), make power unit can steady operation, reduce the impact to user, power unit.

Compared with the arrangement of a spring and a cam mechanism, the device has the advantages of simple structure, convenience in use, low design and production cost, low requirement on installation space, basically no abrasion (the working surface of the cam is abraded, the precision is reduced, and even the cam cannot work), and long service life.

In a specific implementation, the end of the first arm 31 is hinged to a first connecting member 6, the first connecting member 6 is fixed to a first end of the elastic member 4, and a second end of the elastic member 4 is fixed to the frame 1. Through the arrangement, the first connecting piece 6 and the elastic piece 4 can rotate, and over-constraint is avoided.

In the specific implementation, the rack 1 includes a base 11, the bottom of the base 11 is flat and is used for installation or placement on the ground, a first supporting seat 12 is fixed on the base 11, and the universal joint 7 is fixed on the first supporting seat 12.

It should be noted that the elastic member 4 may be a cylindrical coil spring. Other forms of parts may be used as would be known to those skilled in the art and are not to be enumerated.

In a specific implementation, the universal joint 7 and the first support seat 12 are fixed to the first support seat 12 through the second connection member 9, a first end of the second connection member 9 is fixed to the universal joint 7, a second end of the second connection member 9 is fixed to the first support seat 12, and the position of the second connection member 9 fixed to the first support seat 12 is adjustable. The universal joint 7 is arranged, so that the freedom of movement of the elastic part 4 relative to the second connecting part 9 is improved, and stress caused by over-constraint is prevented. And, the length of the second connecting member 9 is adjustable by adjusting the position of the second connecting member 9 fixed on the first supporting seat 12, so that the pre-loaded tension on the elastic member 4 can be adjusted.

In a specific implementation, the second connecting member 9 includes a connecting bolt 91 and an adjusting nut 92, a first end of the connecting bolt 91 passes through a through hole provided in the first supporting seat 12 and is locked by the adjusting nut 92, and a second end of the connecting bolt 91 is fixed to the universal joint 7. The tension pre-loaded on the elastic element 4 can be adjusted by rotating the adjusting nut 92, and the adjustment is convenient. Make the pulling force that elastic component 4 provided adjustable to adapt to the 2 demands of balancing weight of different weight, widened the utility model discloses an application scope.

In a specific implementation, the frame 1 further includes a second support seat 13 and a sliding frame 14, the second support seat 13 and the sliding frame 14 are both fixed to the base 11, the lever 3 is hinged to the second support seat 13, the counterweight 2 is slidably disposed along the sliding frame 14, and the sliding frame 14 is vertically disposed.

In one embodiment, the force applying member 8 includes a belt 81 and a fixed pulley 82, a first end of the belt 81 is fixed to the end of the second arm 32, the belt 81 is connected to the counterweight 2 after passing around the fixed pulley 82, and the fixed pulley 82 is fixed to the upper end of the sliding frame 14. Simple structure, flexible belt 81 transmission itself possesses certain shock resistance, does benefit to the steady operation of this device.

In one embodiment, the force applying member 8 further comprises a rotating sleeve 83 and a fixed shaft 84, the fixed shaft 84 is fixed to the end of the second arm 32, and the rotating sleeve 83 is rotatably mounted on the fixed shaft 84.

In a specific implementation, referring to fig. 3, the power input member 5 comprises: the hand wheel 51, the hand wheel 51 is rotatably mounted on the framework 1; the offset pin shaft 53 is fixed on one side, facing the counterweight block 2, of the hand wheel 51, and the offset pin shaft 53 is not coaxial with the hand wheel 51; and the stress groove 21 is arranged on the balancing weight 2, the stress groove 21 is horizontally arranged, the offset pin shaft 53 is slidably arranged in the stress groove 21, and the distance from the axis of the offset pin shaft 53 to the axis of the hand wheel 51 is smaller than the distance from the axis of the hand wheel 51 to the two ends of the stress groove 21.

When the power input component 5 works, the handle 511 on the hand wheel 51 is held by hands to rotate the hand wheel 51, so that the offset pin shaft 53 is driven to rotate around the rotating shaft 512 of the hand wheel, and because the distance from the axis of the offset pin shaft 53 to the axis of the hand wheel 51 is smaller than the distance from the axis of the hand wheel 51 to the two ends of the stress slot 21, the offset pin shaft 53 cannot be disengaged from the stress slot 21, so that the counterweight block 2 is driven to slide.

In a specific implementation, a crank 52 is fixedly connected to the rotating shaft 512 of the hand wheel, and the offset pin 53 is fixed to the distal end of the crank 52.

Although specific embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are merely examples and that many changes and modifications may be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims.

Claims

1. A gravity balancing device, comprising: a frame; the counterweight block is slidably mounted on the rack along the vertical direction; the lever comprises a first arm and a second arm, the joint of the first arm and the second arm is hinged to the rack, the tail end of the first arm is fixed to the rack through an elastic part, the tail end of the second arm is connected to the balancing weight through a force application part so as to lift the balancing weight upwards, and the force arm of the second arm is not smaller than that of the first arm; and

and the power input component drives the counterweight block to slide under the driving of a manual driving device or a power unit.

2. The gravity balance device of claim 1 wherein the distal end of said first arm is hingedly connected to a first attachment member, said first attachment member being secured to a first end of said resilient member, a second end of said resilient member being secured to said frame.

3. The gravity balance device according to claim 2, wherein said frame comprises a base, a first support seat being fixed to said base, and said elastic member being fixed to said first support seat by a universal joint.

4. The gravity balance device according to claim 3, wherein the universal joint and the first support base are fixed to the first support base by a second connecting member, a first end of the second connecting member is fixed to the universal joint, a second end of the second connecting member is fixed to the first support base, and a position at which the second connecting member is fixed to the first support base is adjustable.

5. The gravity balance device according to claim 4, wherein the second connecting member comprises a connecting bolt and an adjusting nut, a first end of the connecting bolt is locked by the adjusting nut after passing through a through hole provided in the first support base, and a second end of the connecting bolt is fixed to the universal joint.

6. The gravity balance device of claim 5 wherein said frame further comprises a second support base and a carriage, said second support base and said carriage each being secured to said base, said lever being hingedly connected to said second support base, said counterweight being slidably disposed along said carriage, said carriage being vertically disposed.

7. The gravity balance device according to claim 6, wherein said force applying member comprises a belt and a fixed pulley, wherein a first end of said belt is fixed to an end of said second arm, said belt is connected to said weight block after passing around said fixed pulley, and said fixed pulley is fixed to an upper end of said carriage.

8. The gravity balance device of claim 7 wherein said force applying member further comprises a rotating sleeve and a fixed shaft, said fixed shaft being fixed to the distal end of said second arm, said rotating sleeve being rotatably mounted to said fixed shaft.

9. The gravity balancing device according to any one of claims 1 to 8, wherein the power input member comprises: the hand wheel is rotatably arranged on the frame; the offset pin shaft is fixed on one side, facing the balancing weight, of the hand wheel, and is not coaxial with the hand wheel; and the stress groove is arranged on the balancing weight, the stress groove is horizontally arranged, the offset pin shaft is arranged in the stress groove in a sliding manner, and the distance from the axis of the offset pin shaft to the axis of the hand wheel is smaller than the distance from the axis of the hand wheel to two ends of the stress groove.

10. The gravity balancing device according to claim 9, wherein a crank is fixedly connected to the rotation shaft of the hand wheel, and the offset pin is fixed to a distal end of the crank.