Barrier gate equipment

Abstract

The utility model belongs to the technical field of barrier gates, and discloses barrier gate equipment, which comprises a case and a gate rod, the case comprises a case body, and a cavity is formed in the case body; the barrier gate machine core comprises a main shaft, a driving mechanism, a driving connecting rod mechanism, an elastic balance mechanism and a balance connecting rod mechanism, the main shaft is rotationally arranged on the box body around the horizontal axis and penetrates out of the cavity to be connected with the gate rod, and the driving mechanism is in transmission connection with one end of the main shaft through the driving connecting rod mechanism. The elastic balance mechanism is connected with the other end of the main shaft through the balance connecting rod mechanism, the driving connecting rod mechanism and the balance connecting rod mechanism are arranged on the two symmetrical sides in the cavity respectively, a first sealing plate and a second sealing plate are arranged in the cavity, and the first sealing plate is arranged on the outer side of the driving connecting rod mechanism in an openable and closable mode. The second sealing plate is arranged on the outer side of the balance connecting rod mechanism in an opening and closing mode. The barrier gate equipment can prevent the driving connecting rod mechanism and the balance connecting rod mechanism from causing mechanical injury to operators, the operation risk is reduced, and non-stop overhaul and maintenance operation can be conveniently carried out.

Description

Technical Field

[0001] This utility model relates to the field of barrier gate technology, and in particular to a barrier gate device. Background Technology

[0002] Barrier gates are widely used in parking lots, schools, factories, and other locations to effectively manage the entry and exit of vehicles and pedestrians. A typical barrier gate includes a housing, a power mechanism, and an electrical control system.

[0003] When the barrier gate needs to be debugged or repaired, the operators need to open the cabinet door to operate it. At this time, the power mechanism is exposed. When the barrier gate is activated, the power mechanism moves accordingly, which poses a risk of mechanical injury to the operators. Therefore, debugging and repair need to be carried out by stopping the machine, which affects the normal use of the barrier gate.

[0004] Therefore, there is an urgent need for a barrier gate device to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this utility model is to provide a barrier gate device that can avoid mechanical injury to maintenance personnel caused by the drive linkage mechanism and the balance linkage mechanism, reduce operational risks, enable maintenance operations without shutting down the machine, and allow the first and second sealing plates to be selectively opened, providing high flexibility.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A barrier gate device is provided, comprising a housing and a gate arm, wherein the housing includes:

[0008] The box contains a cavity.

[0009] The barrier gate mechanism includes a main shaft and a drive mechanism, a drive linkage mechanism, an elastic balancing mechanism, and a balancing linkage mechanism disposed within the cavity. The main shaft is rotatably disposed within the housing about a horizontal axis and extends through the cavity to connect to the gate arm. The drive mechanism is connected to one end of the main shaft via the drive linkage mechanism, and the elastic balancing mechanism is connected to the other end of the main shaft via the balancing linkage mechanism. The drive linkage mechanism and the balancing linkage mechanism are respectively disposed on symmetrical sides within the cavity. The cavity is provided with a first sealing plate and a second sealing plate. The first sealing plate is closably disposed on the outside of the drive linkage mechanism, and the second sealing plate is closably disposed on the outside of the balancing linkage mechanism.

[0010] As a preferred technical solution, the barrier gate device further includes:

[0011] A backup power supply is installed inside the cavity and is electrically connected to the drive mechanism to supply power to the drive mechanism.

[0012] As a preferred technical solution, the barrier gate equipment further includes an electrical control mechanism, which is installed inside the cavity and is electrically connected to both the drive mechanism and the backup power supply.

[0013] As a preferred technical solution, the box body has openings on both the front and rear sides, and the box body also includes two doors for closing the openings. The doors are provided with decorative panels, and the cavity is provided with light-emitting elements corresponding to the decorative panels. The light-emitting elements are used to emit light to the decorative panels to illuminate them.

[0014] As a preferred technical solution, the top of the box is provided with a box cover, and a light strip is installed between the box cover and the box body or on the box cover.

[0015] As a preferred technical solution, the cavity is configured with a U-shaped structure, including a symmetrically arranged front sub-cavity and a rear sub-cavity, and an intermediate sub-cavity disposed between the front sub-cavity and the rear sub-cavity. There is a clearance space between the front sub-cavity and the rear sub-cavity. The main shaft is rotatably disposed in the clearance space. The drive mechanism is disposed in the intermediate sub-cavity. The drive linkage mechanism and the first sealing plate are disposed in the front sub-cavity. The balance linkage mechanism and the second sealing plate are disposed in the rear sub-cavity.

[0016] As a preferred technical solution, the lower end of the first sealing plate is rotatably connected to the box body, and the upper end of the first sealing plate is magnetically connected to the box body; and / or

[0017] The lower end of the second sealing plate is rotatably connected to the box body, and the upper end of the second sealing plate is magnetically connected to the box body.

[0018] As a preferred technical solution, the driving mechanism includes a drive motor and a reducer, the output end of the drive motor is connected to the input end of the reducer, and the output end of the reducer is connected to the drive linkage mechanism.

[0019] As a preferred technical solution, the elastic balancing mechanism includes:

[0020] Multiple tension springs, one end of which is connected to the bottom of the housing; and

[0021] The spring plate has one end rotatably connected to the balance linkage mechanism via a connecting rod, and the other end is connected to the other end of the plurality of tension springs.

[0022] As a preferred technical solution, the drive linkage mechanism includes a drive shaft crank arm, a transmission link, and a first main shaft crank arm rotatably connected in sequence. The end of the drive shaft crank arm away from the transmission link is connected to the output end of the drive mechanism, and the end of the first main shaft crank arm away from the transmission link is connected to one end of the main shaft; and / or

[0023] The balance linkage mechanism includes a balance crank arm and a second main shaft crank arm. One end of the balance crank arm is rotatably connected to the output end of the elastic balance mechanism, and the other end of the balance crank arm is rotatably connected to one end of the second main shaft crank arm. The other end of the second main shaft crank arm is connected to the other end of the main shaft.

[0024] The beneficial effects of this utility model are:

[0025] The barrier gate device provided by this utility model has a barrier gate mechanism installed in a housing. One end of the gate arm is connected to the main shaft. The drive linkage mechanism and the balance linkage mechanism are symmetrically arranged on both sides of the cavity. The drive mechanism is connected to one end of the main shaft through the drive linkage mechanism to drive the gate arm to flip up and down. The elastic balance mechanism is connected to the other end of the main shaft through the balance linkage mechanism to apply an elastic force to the main shaft when the gate arm flips up, assisting the gate arm to flip up. When the gate arm flips down, it slows down the descent rate and stores elastic potential energy. The first sealing plate shields the drive linkage mechanism, and the second sealing plate shields the balance linkage mechanism, which can avoid mechanical injury to maintenance personnel caused by the drive linkage mechanism and the balance linkage mechanism, reduce the operation risk, and allow the barrier gate device to be maintained and repaired without shutting down. When maintenance and repair of the drive linkage mechanism and the balance linkage mechanism are required, the corresponding first sealing plate or second sealing plate can be opened or closed, providing high flexibility. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the barrier gate device provided by this utility model;

[0027] Figure 2 This is an exploded view of the barrier gate device provided by this utility model. Figure 1 ;

[0028] Figure 3 This is an exploded view of the barrier gate device provided by this utility model. Figure 2 ;

[0029] Figure 4 This is a schematic diagram of the internal structure of the chassis provided by this utility model. Figure 1 ;

[0030] Figure 5 This is a schematic diagram of the internal structure of the chassis provided by this utility model. Figure 2 ;

[0031] Figure 6 This is a schematic diagram of the installation structure of the barrier gate mechanism provided by this utility model. Figure 1 ;

[0032] Figure 7 This is a schematic diagram of the installation structure of the barrier gate mechanism provided by this utility model. Figure 2 .

[0033] In the picture:

[0034] 100. Chassis; 200. Gate arm;

[0035] 10. Enclosure; 101. Front cavity; 102. Rear cavity; 103. Middle cavity; 104. Clearance space; 11. First sealing plate; 12. Second sealing plate; 13. Enclosure door; 14. Decorative panel; 15. Light-emitting element; 16. Enclosure lid; 17. Light strip;

[0036] 20. Spindle; 21. Handle;

[0037] 30. Drive mechanism; 31. Drive motor; 32. Reducer;

[0038] 40. Drive linkage mechanism; 41. Drive shaft crank arm; 42. Transmission link; 43. First main shaft crank arm;

[0039] 50. Elastic balancing mechanism; 51. Tension spring; 52. Spring plate; 53. Connecting rod;

[0040] 60. Balance linkage mechanism; 61. Balance crank arm; 62. Second main shaft crank arm;

[0041] 70. Backup power supply; 71. Switch knob;

[0042] 80. Electrical control mechanism. Detailed Implementation

[0043] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0044] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0047] like Figures 1-7 As shown, this embodiment provides a barrier gate device, which includes a housing 100 and a gate arm 200. The housing 100 includes a box body 10 and a barrier gate mechanism. A cavity is formed inside the box body 10. The barrier gate mechanism includes a main shaft 20 and a drive mechanism 30, a drive linkage mechanism 40, an elastic balancing mechanism 50, and a balancing linkage mechanism 60 disposed in the cavity. The main shaft 20 is rotatably disposed in the box body 10 about a horizontal axis and extends out of the cavity. A handle 21 for mounting the gate arm 200 is fixed on the main shaft 20. The handle 21 is fixedly connected to one end of the gate arm 200 by a plurality of fastening bolts. The drive mechanism 30 is connected to one end of the main shaft 20 through the drive linkage mechanism 40. The elastic balancing mechanism 50 is connected to the other end of the main shaft 20 through the balancing linkage mechanism 60.

[0048] Furthermore, such as Figures 1-7 As shown, the drive linkage mechanism 40 and the balance linkage mechanism 60 are respectively located on the symmetrical sides of the cavity. A first sealing plate 11 and a second sealing plate 12 are symmetrically arranged in the cavity. The first sealing plate 11 is closable and located on the outside of the drive linkage mechanism 40. When the first sealing plate 11 is closed, it can cover the drive linkage mechanism 40. The second sealing plate 12 is closable and located on the outside of the balance linkage mechanism 60. When the second sealing plate 12 is closed, it can cover the balance linkage mechanism 60.

[0049] Specifically, in the barrier gate device provided in this embodiment, the barrier gate mechanism is installed in the housing 10, one end of the gate arm 200 is connected to the main shaft 20, the drive linkage mechanism 40 and the balance linkage mechanism are symmetrically arranged on both sides of the cavity, the drive mechanism 30 is connected to one end of the main shaft 20 through the drive linkage mechanism 40 to drive the gate arm 200 to flip up and down, and the elastic balance mechanism 50 is connected to the other end of the main shaft 20 through the balance linkage mechanism 60 to apply an elastic force to the main shaft 20 when the gate arm 200 flips up, assisting the gate arm 200 to flip up, and slowing down the descent rate and storing elastic potential energy when the gate arm 200 flips down. The first sealing plate 11 shields the drive linkage mechanism 40, and the second sealing plate 12 shields the balance linkage mechanism 60. This can prevent mechanical injury to maintenance personnel caused by the drive linkage mechanism 40 and the balance linkage mechanism 60, reduce operational risks, and allow the barrier gate equipment to be maintained and repaired without shutting down. When maintenance and repair of the drive linkage mechanism 40 and the balance linkage mechanism 60 are required, the corresponding first sealing plate 11 or second sealing plate 12 can be opened, providing high flexibility.

[0050] For example, such as Figures 1-5 As shown, the cavity is configured with a U-shaped structure, including a front sub-cavity 101 and a rear sub-cavity 102 symmetrically arranged front and rear, and an intermediate sub-cavity 103 located between the front sub-cavity 101 and the rear sub-cavity 102. A clearance space 104 exists between the front sub-cavity 101 and the rear sub-cavity 102. The main shaft 20 is rotatably mounted in the clearance space 104 around a horizontal axis. The drive mechanism 30 is located in the intermediate sub-cavity 103. The drive linkage mechanism 40 and the first sealing plate 11 are located in the front sub-cavity 101, and the balance linkage mechanism 60 and the second sealing plate 12 are located in the rear sub-cavity 102. The housing 10 provided in this embodiment adopts an integrated structure, with a clearance space 104 in the middle for installing the gate arm 200. The remaining components of the barrier gate mechanism are distributed in the front sub-cavity 101, the rear sub-cavity 102 on the front and rear sides, and the intermediate sub-cavity 103 in the middle. The layout is reasonable and compact, and it can be used for opening from both left and right, demonstrating strong versatility.

[0051] For example, such as Figures 2-5 As shown, the lower end of the first sealing plate 11 is rotatably connected to the box body 10, and the upper end of the first sealing plate 11 is magnetically connected to the box body 10. Specifically, the first sealing plate 11 is made of ferromagnetic metal such as iron plate, and a magnet is provided on the box body 10. When the first sealing plate 11 is closed, it is fixed by being attracted by the magnet. The first sealing plate 11 is provided with a handle. The operator can open the first sealing plate 11 by pulling the handle to flip the first sealing plate 11 outward and separating it from the magnet.

[0052] For example, such as Figures 2-5As shown, the lower end of the second sealing plate 12 is rotatably connected to the housing 10, and the upper end of the second sealing plate 12 is magnetically connected to the housing 10. Specifically, the second sealing plate 12 is made of ferromagnetic metal such as iron plate, and a magnet is provided on the housing 10. When the second sealing plate 12 is closed, it is fixed by being attracted by the magnet. The second sealing plate 12 is provided with a handle. The operator can open the second sealing plate 12 by pulling the handle to flip the second sealing plate 12 outward and separating it from the magnet.

[0053] Of course, in other embodiments of this utility model, the upper ends of the first sealing plate 11 and the second sealing plate 12 can also be detachably connected to the box body 10 through a structure such as a buckle.

[0054] For example, such as Figures 1-5 As shown, the box body 10 has openings on both the front and rear sides. The box body 10 also includes two doors 13 for closing the openings. Each door 13 has a handle, allowing operators to open the doors for inspection and maintenance. Furthermore, each door 13 has a decorative panel 14, and the cavity contains a corresponding light-emitting element 15. The light-emitting element 15 emits light to illuminate the decorative panel 14. The decorative panel 14 is transparent or semi-transparent and can be decorated with patterns or logos to enhance its aesthetics and promotional effect.

[0055] For example, the light-emitting element 15 may be an LED light source.

[0056] For example, such as Figures 1-3 As shown, the top of the enclosure 10 is provided with a cover 16. A light strip 17 is installed between the cover 16 and the enclosure 10 or on the cover 16. The light strip 17 can improve the aesthetics and also indicate the position and shape of the enclosure 100 at night, serving as a conspicuous warning.

[0057] For example, such as Figures 1-3 As shown, the lid 16 is configured as a U-shaped structure that fits the body 10, and the light strip 17 extends around the periphery of the lid 16.

[0058] For example, such as Figures 4-7 As shown, the drive mechanism 30 includes a drive motor 31 and a reducer 32. The output end of the drive motor 31 is connected to the input end of the reducer 32, and the output end of the reducer 32 is connected to the drive linkage mechanism 40. Specifically, the drive motor 31 is a rotary motor, and its output shaft is connected to the input end of the reducer 32. The reducer 32 is mounted on the housing 10.

[0059] For example, such as Figures 4-7As shown, the drive linkage mechanism 40 includes a drive shaft crank arm 41, a transmission link 42, and a first main shaft crank arm 43, which are rotatably connected in sequence. The end of the drive shaft crank arm 41 away from the transmission link 42 is connected to the output end of the drive mechanism 30, specifically to the output shaft of the reducer 32. The end of the first main shaft crank arm 43 away from the transmission link 42 is connected to one end of the main shaft 20. When the drive motor 31 rotates, it causes the drive shaft crank arm 41 to swing, which in turn causes the transmission link 42 and the first main shaft crank arm 43 to rotate. The main shaft 20 then rotates, driving the gate arm 200 to rise and fall.

[0060] For example, such as Figures 4-7 As shown, the elastic balancing mechanism 50 includes multiple tension springs 51 and spring plates 52. The tension springs 51 are arranged in a matrix. One end of each tension spring 51 is connected to the bottom of the housing 10, and the other end is connected to the bottom surface of the spring plate 52. The top surface of the spring plate 52 is rotatably connected to the balancing linkage mechanism 60 via a connecting rod 53. The connecting rod 53 can be a screw, and it is threaded to the spring plate 52 or fixed to it with a nut.

[0061] For example, such as Figures 4-7 As shown, the balance linkage mechanism 60 includes a balance crank arm 61 and a second main shaft crank arm 62. One end of the balance crank arm 61 is rotatably connected to the output end of the elastic balance mechanism 50, specifically to the upper end of the connecting rod 53. The other end of the balance crank arm 61 is rotatably connected to one end of the second main shaft crank arm 62, and the other end of the second main shaft crank arm 62 is connected to the other end of the main shaft 20. When the tension spring 51 retracts, it pulls the balance crank arm 61 downward while simultaneously rotating, causing the second main shaft crank arm 62 and the main shaft 20 to rotate in the direction that causes the gate arm 200 to rise. When the gate arm 200 descends, driven by the drive mechanism 30, the main shaft 20 drives the second main shaft crank arm 62 to rotate in the opposite direction, causing the balance crank arm 61 to rotate in the opposite direction and rise. The tension spring 51 is stretched, and its elastic potential energy increases.

[0062] For example, such as Figure 2 , Figure 4 , Figure 6 and Figure 7 As shown, the barrier gate device also includes a backup power supply 70, which is installed inside the cavity, specifically at the bottom of the cavity. The backup power supply 70 is electrically connected to the drive mechanism 30 to supply power to the drive mechanism 30. When the external power supply is disconnected, the user can turn on the backup power supply 70 to restore power to the drive mechanism 30 and restore the function of the barrier gate device.

[0063] Furthermore, such as Figure 2 and Figure 4As shown, the barrier gate equipment also includes a switch knob 71, which is installed on the side wall of the housing 10. The switch knob 71 is electrically connected to the backup power supply 70 and is used to control the switch of the backup power supply 70 to improve the convenience of the user to turn the backup power supply 70 on and off.

[0064] For example, such as Figure 2 , Figure 4 and Figure 6 As shown, the barrier gate equipment also includes an electrical control mechanism 80, which is installed inside the cavity. The electrical control mechanism 80 is electrically connected to the drive mechanism 30 and the backup power supply 70, and is used to control the operation of the drive mechanism 30 and the backup power supply 70. The electrical control mechanism 80 can be a single-chip microcomputer as used in the prior art, which is capable of loading and running control programs to control the operation of the drive mechanism 30 and the backup power supply 70.

[0065] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A barrier gate device, comprising a housing (100) and a gate arm (200), characterized in that, The chassis (100) includes: A housing (10) having a cavity formed inside; The barrier gate mechanism includes a main shaft (20) and a drive mechanism (30), a drive linkage mechanism (40), an elastic balancing mechanism (50), and a balancing linkage mechanism (60) disposed within the cavity. The main shaft (20) is rotatably disposed in the housing (10) about a horizontal axis and extends through the cavity to connect to the gate arm (200). The drive mechanism (30) is connected to one end of the main shaft (20) via the drive linkage mechanism (40). The elastic balancing mechanism (50) and the balancing linkage mechanism (60) are all located within the cavity. 0) The other end of the main shaft (20) is connected through the balance linkage mechanism (60). The drive linkage mechanism (40) and the balance linkage mechanism (60) are respectively located on the symmetrical sides of the cavity. The cavity is provided with a first sealing plate (11) and a second sealing plate (12). The first sealing plate (11) is closably disposed on the outside of the drive linkage mechanism (40), and the second sealing plate (12) is closably disposed on the outside of the balance linkage mechanism (60).

2. The barrier gate device according to claim 1, characterized in that, The barrier gate equipment also includes: A backup power supply (70) is installed in the cavity and is electrically connected to the drive mechanism (30) to supply power to the drive mechanism (30).

3. The barrier gate device according to claim 2, characterized in that, The barrier gate equipment also includes an electrical control mechanism (80), which is installed in the cavity and is electrically connected to the drive mechanism (30) and the backup power supply (70).

4. The barrier gate device according to claim 1, characterized in that, The box body (10) has openings on both the front and rear sides. The box body (10) also includes two boxes (13) for closing the openings. The boxes (13) are provided with decorative panels (14). The cavity is provided with light-emitting elements (15) corresponding to the decorative panels (14). The light-emitting elements (15) are used to emit light to the decorative panels (14) to illuminate the decorative panels (14).

5. The barrier gate device according to claim 1, characterized in that, The top of the box (10) is provided with a box cover (16), and a light strip (17) is installed between the box cover (16) and the box (10) or on the box cover (16).

6. The barrier gate device according to any one of claims 1-5, characterized in that, The cavity is configured as a U-shaped structure, including a front sub-cavity (101) and a rear sub-cavity (102) arranged symmetrically, and an intermediate sub-cavity (103) disposed between the front sub-cavity (101) and the rear sub-cavity (102). There is a clearance space (104) between the front sub-cavity (101) and the rear sub-cavity (102). The main shaft (20) is rotatably disposed in the clearance space (104). The drive mechanism (30) is disposed in the intermediate sub-cavity (103). The drive linkage mechanism (40) and the first sealing plate (11) are disposed in the front sub-cavity (101). The balance linkage mechanism (60) and the second sealing plate (12) are disposed in the rear sub-cavity (102).

7. The barrier gate device according to claim 6, characterized in that, The lower end of the first sealing plate (11) is rotatably connected to the box body (10), and the upper end of the first sealing plate (11) is magnetically connected to the box body (10); and / or The lower end of the second sealing plate (12) is rotatably connected to the box body (10), and the upper end of the second sealing plate (12) is magnetically connected to the box body (10).

8. The barrier gate device according to any one of claims 1-5, characterized in that, The drive mechanism (30) includes a drive motor (31) and a reducer (32). The output end of the drive motor (31) is connected to the input end of the reducer (32), and the output end of the reducer (32) is connected to the drive linkage mechanism (40).

9. The barrier gate device according to any one of claims 1-5, characterized in that, The elastic balancing mechanism (50) includes: Multiple tension springs (51), one end of which is connected to the bottom of the housing (10); and The spring plate (52) is rotatably connected at one end to the balance linkage mechanism (60) via a connecting rod (53), and at the other end to the other end of the plurality of tension springs (51).

10. The barrier gate device according to any one of claims 1-5, characterized in that, The drive linkage mechanism (40) includes a drive shaft crank arm (41), a transmission link (42), and a first main shaft crank arm (43) rotatably connected in sequence. The end of the drive shaft crank arm (41) away from the transmission link (42) is connected to the output end of the drive mechanism (30), and the end of the first main shaft crank arm (43) away from the transmission link (42) is connected to one end of the main shaft (20); and / or The balance linkage mechanism (60) includes a balance crank arm (61) and a second main shaft crank arm (62). One end of the balance crank arm (61) is rotatably connected to the output end of the elastic balance mechanism (50), and the other end of the balance crank arm (61) is rotatably connected to one end of the second main shaft crank arm (62). The other end of the second main shaft crank arm (62) is connected to the other end of the main shaft (20).

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