Gravity balance system and balance car

Abstract

The utility model discloses a gravity balance system and a balance car, the gravity balance system comprises a swing seat, a bearing seat and a swing mechanism connecting the swing seat and the bearing seat, the swing mechanism comprises a first gravity distribution rod and a second gravity distribution rod, the bottom of the first gravity distribution rod is connected with the swing seat, and the bottom of the second gravity distribution rod is connected with the bearing seat; a first rotating part is arranged at the top of the first gravity distribution rod and is higher than the swing seat, the bottom of the second gravity distribution rod is connected with the bearing seat, and a second rotating part is arranged at the top of the second gravity distribution rod and is higher than the bearing seat; the swing seat can swing relative to the bearing seat through the rotating connection of the first rotating piece and the second rotating piece. The gravity acceleration direction of the swing seat in the swing process is downward, so that the swing seat naturally tends to a balance point below the swing center in the swing process, the swing seat has high stability when swinging, and the phenomenon of rollover caused by deviation of the gravity center of the swing seat does not exist.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of balancing systems, and particularly relates to a gravity balancing system and a balance car. BACKGROUND

[0002] Traditional traveling devices usually have two-wheeled vehicles, three-wheeled vehicles and four-wheeled vehicles, and the two-wheeled vehicles including motorcycles and electric bicycles have the characteristics of small size and high compactness, but have poor sealing and are not suitable for high and low temperature and rainy or snowy weather. Small three-wheeled vehicles or four-wheeled vehicles are convenient to set a closed vehicle cabin and have good applicability to high and low temperature and rainy or snowy weather, but the steering in a medium or high speed motion state is easy to cause the center of gravity of the vehicle body to deviate, thereby causing the vehicle to overturn and having insufficient safety. To solve the technical problem, the prior art usually adopts the way of widening the vehicle body to reduce the center of gravity of the vehicle body, thereby increasing the stability of the vehicle during steering, but this will cause the vehicle to increase in size and affect the agility of the vehicle, so that the application occasions of the vehicle are limited and the use experience of the user is affected. CONTENT OF THE UTILITY MODEL

[0003] The application provides a gravity balancing system and a balance car to solve the technical problem that a traditional three-wheeled vehicle or four-wheeled vehicle is easy to overturn during steering.

[0004] The technical scheme adopted by the application is as follows:

[0005] A gravity balancing system comprises a swing seat, a bearing seat and a swing mechanism connecting the swing seat and the bearing seat, the swing mechanism comprises a first gravity distribution rod and a second gravity distribution rod, the bottom of the first gravity distribution rod is connected with the swing seat, the top of the first gravity distribution rod is provided with a first rotating part, the first rotating part is higher than the swing seat, the bottom of the second gravity distribution rod is connected with the bearing seat, the top of the second gravity distribution rod is provided with a second rotating part, the second rotating part is higher than the bearing seat, and the swing seat can swing relative to the bearing seat through the rotating connection of the first rotating part and the second rotating part.

[0006] The gravity balancing system described in the application further comprises the following additional technical features:

[0007] The first rotating part is a rotating sleeve, the second rotating part is a rotating rod, and the rotating sleeve is sleeved on the rotating rod and can rotate around the rotating rod.

[0008] The rotating rod is provided with a first limiting part and a second limiting part on both sides in the length direction of the rotating sleeve, and the first limiting part and the second limiting part can stop the rotating sleeve to limit the displacement of the rotating sleeve in the length direction of the rotating rod.

[0009] The connecting position of the swing seat and the first gravity distribution rod is a first connecting point, the connecting position of the first gravity distribution rod and the first rotating member is a second connecting point, and the first gravity distribution rod extends in the vertical direction so that the first connecting point and the second connecting point are located in the same vertical plane.

[0010] The connecting position of the second gravity distribution rod and the second rotating member is a third connecting point, and the second connecting point and the third connecting point are located in the same horizontal plane.

[0011] The distance between the second connecting point and the third connecting point is L1, the distance between the first connecting point and the second connecting point is L2, and L1≤0.3L2.

[0012] The swing seat is provided with a lap joint rod extending in the horizontal direction, one end of the lap joint rod is connected with the swing seat, and the other end of the lap joint rod extends in the horizontal direction and is connected with the first gravity distribution rod.

[0013] Further comprising a first reinforcing rod, one end of the first reinforcing rod is fixedly connected with the first gravity distribution rod, and the other end of the first reinforcing rod extends obliquely in a direction at an angle with the first gravity distribution rod and is fixedly connected with the lap joint rod.

[0014] Further comprising a second reinforcing rod, one end of the second reinforcing rod is fixedly connected with the second gravity distribution rod, and the other end of the second reinforcing rod extends in a direction at an angle with the first gravity distribution rod and away from the second rotating member and is fixedly connected with the bearing seat.

[0015] The application also provides a balance car comprising the gravity balance system.

[0016] Due to the adoption of the above technical solutions, the application has the following beneficial effects:

[0017] 1.The gravity balance system of the present application comprises a swing seat, a bearing seat and a swing mechanism, the swing seat can swing relative to the bearing seat through the swing mechanism, when the swing seat swings relative to the bearing seat, only the gravity center of the swing seat deviates, the gravity center of the bearing seat remains stable as a whole, so the overall gravity center of the gravity balance system tends to be stable; the gravity balance system reduces the amplitude of the gravity center shift of the swing seat during the swing process, which helps to maintain the stability of the gravity balance system; in addition, the gravity balance system of the present application further comprises a first gravity distribution rod and a second gravity distribution rod, wherein the second gravity distribution rod is used to raise the height of the second rotating part, so that the second rotating part and the first rotating part rotatingly connected therewith are located above the bearing seat, and the first gravity distribution rod is used to hang the swing seat below the first rotating part. On the one hand, the gravity center of the swing seat is lowered, so that the swing seat has a shorter distance from the ground, and the lower the gravity center position, the higher the stability of the swing seat, and the probability of imbalance during the swing process of the swing seat is reduced; on the other hand, since the rotating connection point of the first rotating part and the second rotating part is the swing center when the swing seat swings, when the swing seat swings, the movement track of the gravity center shift is below the swing point, and the gravity acceleration direction of the swing seat during the swing process is downward, so that the swing seat naturally tends to the balance point below the swing center during the swing process. In this case, the swing seat has high stability when it swings, and there is no occurrence of rollover phenomenon caused by gravity center deviation of the swing seat.

[0018] 2.As a preferred embodiment of the present application, the first rotating part is set as a rotating sleeve, and the second rotating part is set as a rotating rod, which can effectively ensure the smoothness of the rotation of the first rotating part and the second rotating part, thereby improving the smoothness of the swing process of the swing seat and reducing the probability of the swing limitation phenomenon of the swing seat caused by the existence of the first rotating part and the second rotating part. In addition, the gravity of the swing seat and the first gravity distribution rod is entirely borne by the first rotating part and the second rotating part, the contact area between the rotating sleeve and the rotating rod is large, so the gravity of the swing seat and the first gravity distribution rod can be evenly borne, the possibility of stress concentration phenomenon at the connection of the first rotating part and the second rotating part is reduced, which helps to maintain the service life of the gravity balance system; further, the second rotating part is set as a rotating rod, the relative position between the connection point of the rotating rod and the bearing seat can be controlled by adjusting the length of the rotating rod, which facilitates effective adjustment of the connection point according to the needs of structural design.

[0019] 3. As a preferred embodiment of the present application, since the relative rotation force between the rotating sleeve and the rotating rod is derived from the swing of the swing seat, the swing process of the swing seat may be deviated by external force, which in turn causes the rotating sleeve to have a tendency to slide along the axis of the rotating rod under the action of eccentric force; by setting the first limiting member and the second limiting member, the radial movement of the rotating sleeve along the rotating rod is limited, so that the rotating sleeve is stably positioned between the first limiting member and the second limiting member, thereby ensuring the stability of the relative position relationship between the swing seat and the bearing seat. Avoiding the phenomenon that the rotating sleeve slides away from the bearing seat to escape from the rotating rod or the rotating sleeve slides towards the bearing seat to cause the swing seat and the bearing seat to contact and collide due to uneven force applied by the swing seat to the rotating sleeve, which helps to maintain the stability of the gravitational balance system.

[0020] 4. As a preferred embodiment of the present application, the first connection point and the second connection point are arranged on the same vertical plane, so that when the first gravity distribution rod swings synchronously with the swing of the swing seat, the direction of its gravitational acceleration and the direction of gravity are both within the vertical plane, and the direction of the force applied by the first gravity distribution rod to the first rotating member and the second rotating member is also within the vertical plane; the stability of the force applied to the first rotating member and the second rotating member is improved, and they can relatively rotate stably under the action of the force, which reduces the stress pressure of the first rotating member and the second rotating member and provides protection for the stability of the swing of the swing seat.

[0021] 5. As a preferred embodiment of the present application, when the swing seat swings around the first connection point as the swing center, its own gravity and the swing force generated during the swing process are transmitted to the second gravity distribution rod through the first rotating member and the second rotating member. The second connection point is arranged on the same horizontal plane as the third connection point, so that the force generated by the swing seat during the swing process on the first connection point can be better transmitted to the second gravity distribution rod through the second connection point, and then the bearing seat can better bear the swing mechanism and the swing seat, which helps to improve the stability of the gravitational balance system. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0023] Figure 1 It is a structural schematic diagram of the gravitational balance system according to an embodiment of the present application;

[0024] Figure 2 It is a side view of the gravitational balance system according to an embodiment of the present application; Figure 1 ;

[0025] Figure 3 Side view of a gravity balance system according to one embodiment of this application. Figure 2 ;

[0026] Figure 4 Side view of a gravity balance system according to one embodiment of this application. Figure 3 ;

[0027] Figure 1 This is a schematic diagram of the gravity balance system in another embodiment of this application.

[0028] List of reference numerals in the attached diagram:

[0029] 1 swing seat, 11 overlapping rods;

[0030] 2. Bearing base;

[0031] 3. First gravity distribution rod;

[0032] 4. Second gravity distribution rod;

[0033] 5. Rotate the sleeve;

[0034] 6. Rotating rod; 61. First limiting component; 62. Second limiting component;

[0035] 7. First connection point;

[0036] 8. Second connection point;

[0037] 9. Third connection point;

[0038] 10. First reinforcing bar;

[0039] 110 Second reinforcing bar;

[0040] 120 rotating shaft;

[0041] 130 sleeve. Detailed Implementation

[0042] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0043] Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of this application and the features thereof can be combined with each other.

[0044] In addition, in the description of the present application, it needs to be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0045] In the present application, unless specifically defined and limited otherwise, the terms "mount", "connect", "connect", "fix", and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] In the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0047] As shown in Figure 1 A gravity balance system, including a swing seat 1, a bearing seat 2 and a swing mechanism connecting the swing seat 1 and the bearing seat 2, the swing mechanism including a first gravity distribution rod 3 and a second gravity distribution rod 4, the bottom of the first gravity distribution rod 3 is connected with the swing seat 1, the top of the first gravity distribution rod 3 is provided with a first rotating part, so that the first rotating part is higher than the swing seat 1, the bottom of the second gravity distribution rod 4 is connected with the bearing seat 2, the top of the second gravity distribution rod 4 is provided with a second rotating part, so that the second rotating part is higher than the bearing seat 2, the swing seat 1 can swing relative to the bearing seat 2 through the rotating connection of the first rotating part and the second rotating part.

[0048] The gravity balance system of the application comprises a swing seat 1, a bearing seat 2 and a swing mechanism, the swing seat 1 can swing relative to the bearing seat 2 through the swing mechanism, when the swing seat 1 swings relative to the bearing seat 2, only the gravity center of the swing seat 1 deviates, the gravity center of the bearing seat 2 is generally stable, so the overall gravity center of the gravity balance system tends to be stable; the amplitude of the gravity center shift of the gravity balance system during the swing of the swing seat 1 is reduced, which helps to maintain the stability of the gravity balance system; in addition, the gravity balance system of the application further comprises a first gravity distribution rod 3 and a second gravity distribution rod 4, wherein the second gravity distribution rod 4 is used to raise the height of the second rotating part, so that the second rotating part and the first rotating part rotatingly connected therewith are located above the bearing seat 2, and the first gravity distribution rod 3 can hang the swing seat 1 below the first rotating part. On the one hand, the gravity center of the swing seat 1 is lowered, so that the position of the gravity center of the swing seat 1 is relatively low, and the lower the position of the gravity center, the higher the stability of the swing seat 1, and the probability of imbalance of the swing seat 1 during the swing is reduced; on the other hand, since the rotating connection point of the first rotating part and the second rotating part is the swing center when the swing seat 1 swings, when the swing seat 1 swings, the movement track of the gravity center shift is below the swing point, and the direction of the gravity acceleration of the swing seat 1 during the swing is downward, so that the swing seat 1 naturally tends to the balance point below the swing center during the swing. In this case, the swing seat 1 has high stability when it swings, and there is no occurrence of rollover phenomenon caused by the deviation of the gravity center of the swing seat 1.

[0049] The application does not limit the structure of the first rotating part and the second rotating part, which can adopt any of the following embodiments:

[0050] Embodiment one: the first rotating part comprises a first mounting bearing mounted on the first gravity distribution rod, the second rotating part comprises a second mounting bearing mounted on the second gravity distribution rod, and the first mounting bearing and the second mounting bearing are connected through a rotating shaft. When the swing seat swings, the first gravity distribution rod and the first mounting bearing are driven to swing, and then the rotating shaft is driven to rotate relative to the second mounting bearing.

[0051] Embodiment two: as Figure 2As shown, the first rotating member is a rotating sleeve 5, and the second rotating member is a rotating rod 6. The rotating sleeve 5 is sleeved on the rotating rod 6 and can rotate around the rotating rod 6. The first rotating member is arranged as the rotating sleeve 5, and the second rotating member is arranged as the rotating rod 6, which can effectively ensure the smoothness of the rotation of the first rotating member and the second rotating member, thereby improving the smoothness of the swinging process of the swing seat 1 and reducing the probability of the swing seat 1 swinging being limited due to the existence of the first rotating member and the second rotating member. In addition, the gravity of the swing seat 1 and the first gravity distribution rod 3 is entirely borne by the first rotating member and the second rotating member. The contact area between the rotating sleeve 5 and the rotating rod 6 is large, so the gravity of the swing seat 1 and the first gravity distribution rod 3 can be evenly borne, thereby reducing the possibility of stress concentration at the connection between the first rotating member and the second rotating member and helping to maintain the service life of the gravity balance system. Furthermore, the second rotating member is arranged as the rotating rod 6, which can control the relative position between the connection point of the rotating rod 6 and the swing seat 2 by adjusting the length of the rotating rod 6, thereby facilitating effective adjustment of the connection point according to the needs of structural design.

[0052] As a preferred embodiment of the second embodiment, as shown in Figure 1 The rotating rod 6 is provided with a first limiting member 61 and a second limiting member 62 on both sides in the length direction of the rotating sleeve 5. The first limiting member 61 and the second limiting member 62 can stop the rotating sleeve 5 to limit the displacement of the rotating sleeve 5 along the length direction of the rotating rod 6. Since the relative rotation force between the rotating sleeve 5 and the rotating rod 6 is derived from the swing of the swing seat 1, the swing process of the swing seat 1 may be deviated by external force, thereby causing the rotating sleeve 5 to have a tendency to slide along the axial direction of the rotating rod 6 under the action of eccentric force. By arranging the first limiting member 61 and the second limiting member 62, the radial movement of the rotating sleeve 5 along the rotating rod 6 is limited, so that the rotating sleeve 5 is stably arranged between the first limiting member 61 and the second limiting member 62, thereby ensuring the stability of the relative position relationship between the swing seat 1 and the bearing seat 2. This avoids the rotating sleeve 5 sliding away from the bearing seat 2 to escape from the rotating rod 6 or the rotating sleeve 5 sliding towards the bearing seat 2 to cause the swing seat 1 and the bearing seat 2 to collide, thereby helping to maintain the operation stability of the gravity balance system.

[0053] As a preferred embodiment of the present application, as shown in Figure 3 , Figure 1As shown in the figure, the connection between the swing seat 1 and the first gravity distribution rod 3 is the first connection point 7, the connection between the first gravity distribution rod 3 and the first rotating part is the second connection point 8, and the first gravity distribution rod 3 extends in the vertical direction so that the first connection point 7 and the second connection point 8 are located in the same vertical plane. By setting the first connection point 7 and the second connection point 8 in the same vertical plane, when the first gravity distribution rod 3 synchronously swings following the swing of the swing seat 1, the direction of its gravitational acceleration and the direction of gravity are both located within the vertical plane, and the direction of the force acting on the first rotating part and the second rotating part by the first gravity distribution rod 3 is also located within the vertical plane; thus, the force stability of the first rotating part and the second rotating part is improved, and they can relatively rotate more stably under the action of the force, which reduces the force pressure of the first rotating part and the second rotating part and provides protection for the swing stability of the swing seat 1.

[0054] As a preferred embodiment of the present application, as shown in the figure, Figure 3 , Figure 3 the connection between the second gravity distribution rod 4 and the second rotating part is the third connection point 9, and the second connection point 8 and the third connection point 9 are located in the same horizontal plane. When the swing seat 1 swings around the first connection point 7 as the swing center, its own gravity and the swing force generated in the swing process will be transmitted to the second gravity distribution rod 4 through the first rotating part and the second rotating part. By setting the second connection point 8 and the third connection point 9 in the same horizontal plane, the force generated by the swing seat 1 during the swing process on the first connection point 7 can be better transmitted to the second gravity distribution rod 4 through the second connection point 8, so that the bearing seat 2 can better bear the swing mechanism and the swing seat 1, which helps to improve the stability of the gravity balance system.

[0055] Preferably, as shown in the figure, Figure 4 the distance between the second connection point 8 and the third connection point 9 is L1, and the distance between the first connection point 7 and the second connection point 8 is L2, and L1≤0.3L2. Since the gravity of the swing seat 1, the first gravity distribution rod 3 and the first rotating part is applied to the second rotating part and transmitted to the second gravity distribution rod 4 through the second rotating part, higher requirements are put forward for the structural strength of the second gravity distribution rod 4 and the second rotating part. By setting L1≤0.3L2, the swing seat 1 can have sufficient clearance with the bearing seat 2 to maintain the normal swing requirement of the swing seat 1, and the overhanging length of the second rotating part is reduced as much as possible, which helps to reduce the force pressure of the second gravity distribution rod 4 and improve the structural stability of the gravity balance system.

[0056] As a preferred embodiment of the present application, as shown in the figure, Figure 2As shown, the swing seat 1 is provided with a lap rod 11 extending in the horizontal direction, one end of the lap rod 11 is connected with the swing seat 1, and the other end extends in the horizontal direction and is connected with the first gravity distribution rod 3. By arranging the lap rod 11 to connect the swing seat 1 and the first gravity distribution rod 3, the requirement for the installation position of the swing seat 1 is reduced, and the swing seat 1 can be installed at a position close to or away from the first gravity distribution rod 3 by replacing the lap rod 11 with different lengths according to design needs, thereby optimizing the structural layout of the gravity distribution system.

[0057] Preferably, as shown, the first reinforcing rod 10 is arranged, one end of the first reinforcing rod 10 is fixedly connected with the first gravity distribution rod 3, and the other end extends obliquely in a direction at an angle to the first gravity distribution rod 3 and is fixedly connected with the lap rod 11. The first gravity distribution rod 3 connects the swing seat 1 through the lap rod 11, and the gravity and swing force of the swing seat 1 are all concentrated at the connection between the lap rod 11 and the first gravity distribution rod 3. By arranging the first reinforcing rod 10, another transmission channel is provided for the gravity and swing force of the swing seat 1, the possibility of stress concentration at the connection between the lap rod 11 and the first gravity distribution rod 3 is reduced, and the overall structural strength of the swing mechanism is improved. Figure 2 As a preferred embodiment of the present application, as shown, the second reinforcing rod 110 is further arranged, one end of the second reinforcing rod 110 is fixedly connected with the second gravity distribution rod 4, and the other end extends in a direction at an angle to the first gravity distribution rod 3 and away from the second rotating member and is fixedly connected with the bearing seat 2.

[0058] Figure 1 Since the gravity of the swing seat 1 and the swing mechanism is entirely applied to the second gravity distribution rod 4, the second gravity distribution rod 4 is required to bear a higher load. By arranging the second reinforcing rod 110, the second reinforcing rod 110 and the second gravity distribution rod 4 jointly bear the load of the swing seat 1 and the swing mechanism, which helps to reduce the load pressure of the second gravity distribution rod 4 and ensure the structural strength of the second gravity distribution rod 4.

[0059] The present application does not limit the number and form of the first gravity distribution rod, which can be one first gravity distribution rod and one second gravity distribution rod, or as shown, a plurality of first gravity distribution rods 3 arranged at an angle, or a plurality of second gravity distribution rods.

[0060] In another embodiment of the present application, as shown, the first rotating member includes a rotating shaft 120, and the second rotating member includes a sleeve 130, which is sleeved on the rotating shaft 120 and can rotate around the rotating shaft 120. Figure 5

[0061] In another embodiment of the present application, as shown, the first rotating member includes a rotating shaft 120, and the second rotating member includes a sleeve 130, which is sleeved on the rotating shaft 120 and can rotate around the rotating shaft 120. ​ In another embodiment of the present application, as shown, the first rotating member includes a rotating shaft 120, and the second rotating member includes a sleeve 130, which is sleeved on the rotating shaft 120 and can rotate around the rotating shaft 120.​​

[0062] The application also provides a balance car, comprising the gravity balance system as described above, the balance car of the application has high balance when turning, has small risk of rollover and has good stability.

[0063] The application can be implemented by using or referring to the existing technology for the places not described in the application.

[0064] Each of the embodiments in the specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each of the embodiments mainly describes the difference from other embodiments.

[0065] The above only describes the embodiments of the application and is not used to limit the application. The application can have various changes and modifications for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the application shall be included in the scope of the claims of the application.

Claims

1. A gravity counterbalance system characterized by, The gravity balance system comprises a swing seat, a bearing seat, and a swing mechanism connecting the swing seat and the bearing seat, the swing mechanism comprising a first gravity distribution rod and a second gravity distribution rod, the bottom of the first gravity distribution rod being connected with the swing seat, the top of the first gravity distribution rod being provided with a first rotating part, the first rotating part being higher than the swing seat, the bottom of the second gravity distribution rod being connected with the bearing seat, the top of the second gravity distribution rod being provided with a second rotating part, the second rotating part being higher than the bearing seat, the swing seat being able to swing relative to the bearing seat through the rotating connection of the first rotating part and the second rotating part.

2. The gravity balance system according to claim 1, wherein the first rotating part is a rotating sleeve, and the second rotating part is a rotating rod, the rotating sleeve being sleeved on the rotating rod and being able to rotate around the rotating rod.

3. The gravity balance system according to claim 2, wherein the rotating rod is provided with a first limiting part and a second limiting part on both sides in the length direction of the rotating sleeve, the first limiting part and the second limiting part being able to stop the rotating sleeve to limit the displacement of the rotating sleeve along the length direction of the rotating rod.

4. The gravity balance system according to claim 1, wherein the connection between the swing seat and the first gravity distribution rod is a first connection point, the connection between the first gravity distribution rod and the first rotating part is a second connection point, and the first gravity distribution rod extends in the vertical direction to make the first connection point and the second connection point located in the same vertical plane.

5. The gravity balance system according to claim 4, wherein the connection between the second gravity distribution rod and the second rotating part is a third connection point, and the second connection point and the third connection point are located in the same horizontal plane.

6. The gravity balance system according to claim 5, wherein the distance between the second connection point and the third connection point is L1, the distance between the first connection point and the second connection point is L2, and L1≤0.3L2.

7. The gravity balance system according to claim 1, wherein the swing seat is provided with a lap rod extending in the horizontal direction, one end of the lap rod being connected with the swing seat, and the other end extending in the horizontal direction and being connected with the first gravity distribution rod.

8. The gravity balance system according to claim 7, further comprising a first reinforcing rod, one end of the first reinforcing rod being fixedly connected with the first gravity distribution rod, and the other end extending obliquely in the direction at an angle with the first gravity distribution rod and being fixedly connected with the lap rod.

9. The gravity balance system according to claim 1, further comprising a second reinforcing rod, one end of the second reinforcing rod being fixedly connected with the second gravity distribution rod, and the other end extending in the direction at an angle with the first gravity distribution rod and away from the second rotating part and being fixedly connected with the bearing seat. The gravity balance system according to any one of claims 1-9. ​ 10. A balance car, characterized in that, ​

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