Spring balancer
By using a dual-axis gear transmission structure in the spring balancer, the axial distance is shortened, and the existing spring balancer is not suitable in an environment with small axial space, achieving stable work and safety improvement in small spaces.
Patent Information
- Application Number
- CN202422063036.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-08-26
AI Technical Summary
The existing spring balancers are large in the axial direction, which makes them unsuitable in double-layer car transport vehicles with small axial space, making it prone to safety hazards.
The spring balancer with a dual-axis gear transmission structure shortens the axial distance through the connection between the coil spring and the gear, occupying a smaller axial space, ensuring stable operation in a small space.
It realizes stable work in an environment with small axial space, reduces economic losses and safety hazards, and is suitable for complex occasions such as double-decker trucks.
Smart Images
Figure CN222974785U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of the spatial arrangement of the internal structure of an automobile, in particular to a spring balancer. Background Art
[0002] A spring balancer is a practical device. The spring balancer uses a coil spring as an energy storage element, and balances the gravity of a lifting mechanism through a rope and a sheave. The spring balancer is applicable to a system that makes a lifting motion, enables the lifting mechanism to be in a weightless state, ensures the balanced speed of the mechanism during lifting, and stable movement. The spring balancer can perform lifting operations in a power-off environment, and its power output does not require continuous human effort, making many lifting operations easy. It is applied in the lifting mechanisms of railways, freight trucks, and double-deck automobile transporters.
[0003] However, with the increasing complexity of the current freight truck structure, other mechanisms occupy a large amount of space, the available axial space inside the vehicle is compressed, and the axial space of the spring balancer is getting smaller and smaller. In actual applications, in this case, the spring balancer will interfere with other structures inside the vehicle body, resulting in unstable movement of the lifting mechanism, leading to economic losses and relatively large potential safety hazards.
[0004] Currently, the spring balancer mostly adopts a structural form in which the coil spring and the sheave are connected to the same shaft. The coil spring accumulates elastic potential energy to rotate the shaft, and then drives the sheave to rotate to complete the lifting and lowering movement of the mechanism. The existing spring balancer has obvious disadvantages, which are mainly manifested in that in the axial direction of the spring balancer, the sizes of the sheave and the coil spring are relatively large, and the heavier the lifting mechanism is, the larger the size in the axial direction is, which is not applicable to the double-deck car transporter with a small axial space. Therefore, in view of the above deficiencies, a spring balancer is proposed. Summary of the Invention
[0005] The purpose of the utility model is to provide a spring balancer to overcome the defect that in the axial direction of the existing spring balancer, due to the relatively large sizes of the sheave and the coil spring, and then the heavier the lifting mechanism is, the size in the axial direction of the spring balancer becomes larger, which is not applicable to the double-deck car transporter with a small axial space and is extremely prone to potential safety hazards.
[0006] To achieve the above purpose, the utility model provides a spring balancer, comprising:
[0007] Spring box, a spring is installed inside the spring box, the spring is sleeved on a first shaft, the lower end of the spring box is a gear, the gear is sleeved on the first shaft, a first key is installed inside the gear, the gear is connected to the first shaft through the first key, one side of the gear is meshed and connected to another gear, a cone pulley is installed at the upper end of the another gear, both the cone pulley and the another gear are sleeved on a second shaft, a first key is installed inside the another gear, the another gear is connected to the second shaft through the first key, a second key is installed inside the cone pulley, the cone pulley is connected to the second shaft through the second key, a rope is wound around the outside of the cone pulley, and the cone pulley is connected to a lifting mechanism through the rope.
[0008] Preferably, a spring sleeve is installed at the top end of the spring, and the spring is connected to the first shaft through the spring sleeve.
[0009] Preferably, the structure of the spring is adapted to the structure of the spring box.
[0010] Preferably, a cavity is provided at the center of the gear, and the gear below the spring box is sleeved on the first shaft through the cavity.
[0011] Preferably, the gear below the cone pulley is sleeved on the second shaft through the cavity.
[0012] Preferably, two grooves are provided on the second shaft, the two grooves are a first groove and a second groove respectively, the second shaft is inlaid and connected to the first key through the first groove, and the second shaft is inlaid and connected to the second key through the second groove.
[0013] Preferably, the size of the first groove is adapted to the size of the first key, and the size of the second groove is adapted to the size of the second key.
[0014] Preferably, a card slot is provided at the bottom of the first shaft, the position of the card slot on the first shaft is adapted to the position of the first groove on the second shaft, the first shaft is inlaid with the first key through the card slot, and the size of the card slot is adapted to the size of the first key.
[0015] The utility model has the following beneficial effects:
[0016] The spring balancer provided by the utility model adopts a double-shaft gear transmission structure, has high energy transmission efficiency and high precision, shortens the axial distance, occupies a small axial space, is convenient for use in complex occasions, and even if the gravity of the lifting mechanism is large, it can be easily installed in the vehicle body without interference with other mechanisms, and can complete the lifting movement of the mechanism, further reducing economic losses and effectively eliminating potential safety hazards. Description of the Drawings
[0017] Figure 1 is a top view of the structure of the spring balancer in the embodiment of the utility model;
[0018] Figure 2 It is the front view of the spring balancer structure in the embodiment of the present utility model;
[0019] Figure 3 It is the schematic sectional view of the connection of the coil spring and the gear on the shaft in the embodiment of the present utility model;
[0020] Figure 4 It is the left view of the connection of the cone pulley and the gear on the shaft in the embodiment of the present utility model;
[0021] Figure 5 It is the schematic sectional view of the connection of the cone pulley and the gear on the shaft in the embodiment of the present utility model;
[0022] Figure 6 It is the gear engagement diagram in the embodiment of the present utility model.
[0023] Legend description:
[0024] 1 - Coil spring box; 2 - Coil spring sleeve; 3 - Coil spring; 4 - First shaft; 5 - Second shaft; 6 - Cone pulley, 7 - Gear; 8 - First key; 9 - Second key. Specific implementation manner
[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0026] Figure 1 It is the top view of the spring balancer structure in the embodiment of the present utility model, Figure 2 It is the front view of the spring balancer structure in the embodiment of the present utility model, Figure 3 It is the schematic sectional view of the connection of the coil spring and the gear on the shaft in the embodiment of the present utility model, Figure 4 It is the left view of the connection of the cone pulley and the gear on the shaft in the embodiment of the present utility model, Figure 5 It is the schematic sectional view of the connection of the cone pulley and the gear on the shaft in the embodiment of the present utility model, Figure 6 It is the gear engagement in the embodiment of the present utility model, as Figures 1 to 6 shown, a spring balancer provided by the present utility model includes:
[0027] Spring winding box 1, a spring 3 is installed inside the spring winding box 1, the spring 3 is sleeved on a first shaft 4, the lower end of the spring winding box 1 is a gear 7, the gear 7 is sleeved on the first shaft 4, a first key 8 is installed inside the gear 7, the gear 7 is connected to the first shaft 4 through the first key 8, one side of the gear 7 is meshed and connected to another gear 7, a cone pulley 6 is installed at the upper end of the other gear 7, both the cone pulley 6 and the other gear 7 are sleeved on a second shaft 5, a first key 8 is installed inside the other gear 7, the other gear 7 is connected to the second shaft 5 through the first key 8, a second key 9 is installed inside the cone pulley 6, a rope is wound around the outside of the cone pulley 6, and the cone pulley 6 is connected to a lifting mechanism through the rope.
[0028] In this spring balancer, a spring sleeve 2 is installed at the top end of the spring 3, the spring 3 is connected to the first shaft 4 through the spring sleeve 2, the structure of the spring 3 is adapted to the structure of the spring winding box 1, both the spring winding box 1 and the spring 3 are provided with an annular structure, the inner ring of the spring 3 fixes the first shaft 4 through a spring sleeve 3, the spring 3 is placed inside the inner ring of the spring winding box 1, and the inner ring of the spring winding box 1 is sleeved on the first shaft 4.
[0029] In practical applications, a cavity is provided at the center of the gear 7, the gear 7 below the spring winding box 1 is sleeved on the first shaft 4 through the cavity, and the gear 7 below the cone pulley 6 is sleeved on the second shaft 5 through the cavity.
[0030] In this spring balancer, two grooves are provided on the second shaft 5, the two grooves are respectively a first groove and a second groove, the second shaft 5 is inlaid and connected to the first key 8 through the first groove, the second shaft 5 is inlaid and connected to the second key 9 through the second groove, the size of the first groove is adapted to the size of the first key 8, and the size of the second groove is adapted to the size of the second key 9.
[0031] It should be noted that a card slot is provided at the bottom end of the first shaft 4, the position of the card slot on the first shaft 4 is adapted to the position of the first groove on the second shaft 5, the first shaft 4 is inlaid with the first key 8 through the card slot, and the size of the card slot is adapted to the size of the first key 8.
[0032] In addition, a card interface is provided at the top end of the first shaft 4, the position of the card interface on the first shaft 4 is adapted to the position of the second groove on the second shaft 5, the structure of the spring sleeve 2 is an annular structure, and the first shaft 4 fixes the inner ring of the spring sleeve 2 through the card interface.
[0033] In practical applications, the main internal features of the spring balancer include a spring 3, a gear 7, a cone pulley 6 and a shaft. There are two shafts inside this spring balancer, which are respectively a first shaft 4 and a second shaft 5, effectively reducing the axial distance and saving the axial space of the spring balancer. The spring 3 can provide a large amount of energy in a small space, and the spring 3 is placed and encapsulated inside the spring winding box 1 to prevent wear and damage of the spring 3.
[0034] In this spring balancer, the coil spring 3 and a gear 7 are jointly connected to the first shaft 4. The top end of the coil spring 3 is equipped with a coil spring sleeve 2. The coil spring sleeve 2 is embedded in the first shaft 4. The coil spring 3 is connected to the first shaft 4 through the coil spring sleeve 2. The gear 7 and the first shaft 4 are connected and driven through a first key 8. The second shaft 5 connects the cone pulley 6 and another gear 7. The gear 7 and the second shaft 5 are connected through a first key 8. The cone pulley 6 is connected to the second shaft 5 through a second key 9. One end of the cone pulley 6 has an opening to fix the rope, so that the rope is wound around the cone pulley 6. The end of the rope is connected to the lifting mechanism. The first shaft 4 and the second shaft 5 are connected and driven by the meshing of two gears 7. The gear 7 directly converts the rotational speed, without efficiency loss and with relatively high precision.
[0035] In practical applications, when the lifting mechanism towed by the spring balancer descends, the spring balancer starts to work. First, the rope extends, and the cone pulley 6 starts to rotate. Then, the cone pulley 6 transmits the energy to the second shaft 5 through the key, causing the second shaft 5 to rotate, driving the gear 7 on the second shaft 5 to mesh and rotate with the gear 7 on the first shaft 4. Finally, the coil spring 3 is tightened and compressed, accumulating elastic potential energy.
[0036] In this spring balancer, when the lifting mechanism towed by the spring balancer needs to rise, the accumulated elastic potential energy of the coil spring 3 is released, causing the first shaft 4 to rotate and then driving the gear 7 on the first shaft 4 to rotate. Another gear 7 rotates to drive the second shaft 5 to move and causes the cone pulley 6 to rotate. Finally, the lifting mechanism completes the rising movement.
[0037] The present utility model provides a spring balancer. This spring balancer is a double-shaft type spring balancer, which is suitable for a shorter axial distance and a smaller axial space, and is applicable to the lifting mechanism on the upper layer of a double-deck car transporter. In order to stably achieve the lifting function, the structural dimensions of the coil spring 3 and the cone pulley 6 should not be changed, and a design needs to be carried out in terms of the spatial layout. The working principle of this spring balancer is described in detail below:
[0038] In practical applications, the internal structure of this embodiment includes a coil spring box 1, a coil spring sleeve 2, a coil spring 3, a first shaft 4, a second shaft 5, a cone pulley 6, a gear 7, a first key 8, and a second key 9. Among them, the inside of the coil spring box 1 is the coil spring 3. The coil spring box 1 facilitates the tightening and relaxation of the coil spring 3. The top end of the coil spring 3 is equipped with a coil spring sleeve 2. The coil spring 3 is connected to the first shaft 4 through the coil spring sleeve 2. There is a certain gap between the coil spring 3 and the coil spring box 1, and the tightness of the coil spring 3 is adjusted through the gap and the gravity of the lifting mechanism. The gear 7 is provided with a keyway, and the keyway of the gear 7 installs the first key 8. The gear 7 is connected to the first shaft 4 through the first key 8. The gear 7 meshes with another gear 7. Another gear 7 is also provided with a keyway and installs the first key 8. Another gear is connected to the second shaft 5 through the first key 8. The upper end of another gear 7 is the cone pulley 6. The cone pulley 6 is provided with a keyway, and the cone pulley 6 is connected to the second shaft 5 through the second key 9.
[0039] In practical applications, two gears 7 mesh with each other for transmission. The rope used in the lifting mechanism is fixed at one end of the cone pulley 6. As the cone pulley 6 rotates, the rope is wound around the cone pulley 6 in sequence, the rope becomes shorter, and the mechanism rises. The two gears 7 mesh to transmit power. When the gears 7 mesh, the pitch circles are tangent. The gears 7 are very good transmission mechanisms with high precision and very small errors.
[0040] The spring balancer provided by the present utility model adopts a biaxial gear transmission structure, with high energy transfer efficiency and very high precision. It shortens the axial distance, occupies a smaller axial space, and is convenient for use in complex situations. Even if the gravity of the lifting mechanism is large, it can be easily installed in the vehicle body without interference with other mechanisms to complete the lifting movement of the mechanism, further reducing economic losses and effectively eliminating potential safety hazards.
[0041] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. 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 spring balancer, characterized in that: include: A coil spring box (1) is provided with a coil spring (3) inside the coil spring box (1), the coil spring (3) is sleeved on a first shaft (4), a gear (7) is provided at the lower end of the coil spring box (1), the gear (7) is sleeved on the first shaft (4), a first key (8) is provided inside the gear (7), the gear (7) is connected to the first shaft (4) via the first key (8), one side of the gear (7) is meshed with another gear (7), a step pulley (6) is provided at the upper end of the other gear (7), the step pulley (6) and the other gear (7) are both sleeved on a second shaft (5), a first key (8) is provided inside the other gear (7), the other gear (7) is connected to the second shaft (5) via the first key (8), a second key (9) is provided inside the step pulley (6), the step pulley (6) is connected to the second shaft (5) via the second key (9), a rope is wound around the outer side of the step pulley (6), and the step pulley (6) is connected to a lifting mechanism via the rope.
2. The spring balancer according to claim 1, characterized in that: A coil spring sleeve (2) is installed at the top end of the coil spring (3), and the coil spring (3) is connected to the first shaft (4) via the coil spring sleeve (2).
3. The spring balancer according to claim 1, characterized in that: The structure of the coil spring (3) is compatible with the structure of the coil spring box (1).
4. The spring balancer according to claim 1, characterized in that: A cavity is provided at the centre of the gear (7), and the gear (7) below the coil spring box (1) is sleeved on the first shaft (4) via the cavity.
5. The spring balancer according to claim 4, characterized in that: The gear (7) below the step wheel (6) is sleeved on the second shaft (5) through a cavity.
6. The spring balancer according to claim 1, characterized in that: The second shaft (5) is provided with two grooves, the two grooves being respectively a first groove and a second groove; the second shaft (5) is connected to the first key (8) by being inlaid through the first groove; and the second shaft (5) is connected to the second key (9) by being inlaid through the second groove.
7. The spring balancer according to claim 6, characterized in that: The size of the first groove is adapted to the size of the first key (8), and the size of the second groove is adapted to the size of the second key (9).
8. The spring balancer according to claim 6, characterized in that: A slot is provided at the bottom end of the first shaft (4), the position of the slot of the first shaft (4) being adapted to the position of the first groove of the second shaft (5), the first shaft (4) being inlaid with a first key (8) through the slot, the size of the slot being adapted to the size of the first key (8).