Composite action mechanical control mechanism and power assisting device thereof

Abstract

The invention discloses a composite action mechanical control mechanism and a power assisting device thereof.The control mechanism is used for being connected with an electric control base installed on an engineering vehicle and controlling the electric control base to act so as to further control the engineering vehicle to work, and the engineering vehicle further comprises a vehicle frame; the control mechanism comprises a rotating shaft rotationally connected to two sides in the frame through a bearing seat, and a left control assembly and a right control assembly which are respectively connected with two ends of the rotating shaft; the electric control base comprises a left electric control base and a right electric control base which are respectively connected with the left control assembly and the right control assembly; the control mechanism is respectively connected with the left side and the right side in the frame through two groups of resistance devices, and the resistance devices have certain elastic restoring force, so that certain control force is generated when related control assemblies are shifted, and certain restoring force is generated when the related control assemblies are loosened; when the control assembly is pushed, the resistance of the electric control base and the elastic force of the torsional spring act together, the control hand feeling is improved, and the problem that the control force of a traditional mechanism is light or vacant is solved.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery control mechanism technology, specifically a composite motion mechanical control mechanism and its assist device. Background Technology

[0002] In small construction machinery such as skid steer loaders, the control mechanism is a key component for controlling vehicle movement. Traditional mechanical control mechanisms typically use independent left and right levers, which rotate the electronically controlled base to achieve functions such as forward, reverse, and steering. However, existing mechanical control mechanisms have the following prominent problems in practical use:

[0003] First, the reset of the joystick usually relies on the reset spring or structure of the electric control base itself. After long-term use, it is easy for the reset to become weak or not fully reset, which affects the control accuracy and operation feel. It can also easily lead to premature wear or damage to the electric control base.

[0004] Secondly, the right control lever usually needs to have auxiliary hydraulic functions, that is, in addition to pushing forward and backward, it also needs to swing left and right to control the hydraulic valve core to complete compound functions such as bucket tilting and auxiliary implement actions. This requirement makes the control mechanism complex, difficult to arrange in micro-machinery with limited space, and prone to problems such as interference and jamming. The transmission of control force is unstable, the control feel of compound actions is poor, and it affects the overall machine operation experience and work efficiency.

[0005] Furthermore, traditional mechanical control mechanisms often use split-type rotating shafts or multi-segment connection methods, resulting in large cumulative installation errors. It is difficult to guarantee the coaxiality and position of the left and right control levers, leading to uneven control force and inconsistent control stroke, which further reduces the comfort and accuracy of operation.

[0006] Therefore, it is necessary to develop a mechanical control mechanism that is compact, has stable operating force, reliable reset, and can perform compound actions to meet the increasingly demanding requirements of modern small engineering machinery for operating performance. Summary of the Invention

[0007] The purpose of this invention is to provide a composite action mechanical control mechanism and its assist device to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A composite motion mechanical control mechanism and its assist device are disclosed. The control mechanism is used to connect to and operate an electronic control base mounted on an engineering vehicle to further control the engineering vehicle for operation. The engineering vehicle also includes a frame. The control mechanism includes a rotating shaft rotatably connected to both sides of the frame via bearing seats, and a left control component and a right control component respectively connected to the two ends of the rotating shaft. The electronic control base includes a left electronic control base and a right electronic control base respectively connected to the left and right control components. The control mechanism is connected to the left and right sides of the frame via two sets of resistance devices, each resistance device having a certain elastic restoring force, so that there is a certain operating force when the relevant control components are moved, and a certain restoring force when the relevant control components are released.

[0010] Furthermore, each set of the resistance devices includes a torsion spring base fixedly mounted inside the frame, and a torsion spring connected between the torsion spring base and the operating mechanism.

[0011] Furthermore, the rotating shaft includes a long shaft and a short shaft, which are fixedly connected by a connecting bent plate and are kept coaxial; the end of the long shaft away from the connecting bent plate forms a thin shaft with a diameter smaller than that of the long shaft, and the end of the thin shaft and the end of the short shaft are respectively rotatably connected to the left and right bearing seats; the thin shaft and the connecting bent plate are respectively used to connect the left operating component and the right operating component.

[0012] Furthermore, the left control assembly includes a left control lever and a left curved end integrally formed at the bottom of the left control lever. A U-shaped plate is fixedly connected to the free end of the left curved end. A steel cylinder is fixedly connected to both sides of the U-shaped plate and is rotatably fitted into the thin shaft through the steel cylinder. The U-shaped plate is connected to the left electric control base in sequence through a double ball joint connecting rod and a rotating plate.

[0013] Furthermore, the free end of the left control lever is fitted with a left anti-slip sleeve, and the free end of the left control lever is also provided with a left auxiliary handle.

[0014] Furthermore, the right control assembly includes a right control lever, a right curved end integrally formed on the right control lever, and a right mounting plate fixedly connected to the free end of the right curved end. The right mounting plate is connected to the connecting plate of the rotating shaft. The right mounting plate is connected to the right electric control base in sequence through a double ball joint connecting rod and a rotating plate.

[0015] Furthermore, the free end of the right control stick is fitted with a right anti-slip sleeve, and the free end of the right control stick is also provided with a right auxiliary handle.

[0016] Furthermore, the upper and lower end plates of the right mounting bend plate are rotated to the upper and lower end faces of the connecting bend plate via a pin; the side plate of the right mounting bend plate away from the pin is connected to the hydraulic control valve in sequence via a fisheye shaft bearing ball joint connecting rod and a transfer mechanism, so that the operator can swing the right control lever to pull the hydraulic control valve to operate.

[0017] Furthermore, the transfer mechanism includes a mounting plate weldment fixedly mounted on the frame, a rotating cylinder fixedly connected to the mounting plate weldment, and a rotating base fitted into the rotating cylinder via a T-shaped bushing. A fastening bolt for axially limiting the rotating base is screwed into the top surface of the rotating cylinder. An auxiliary bent plate is mounted on the top surface of the rotating base via a square neck bolt. The end of the auxiliary bent plate away from the mounting plate weldment is connected to the right mounting bent plate via a ball joint connecting rod with a fisheye shaft bearing. The end of the auxiliary bent plate near the mounting plate weldment is connected to the valve core of the hydraulic control valve via a chain link.

[0018] Furthermore, the top surface of the auxiliary bent plate forms a U-shaped mounting through hole, and the auxiliary bent plate is fixedly mounted to the rotating base through the U-shaped mounting through hole and square neck bolts.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. This invention incorporates independent torsion spring assist devices between the left and right control components and the chassis. Specifically, when the control lever is pushed, the resistance of the electronic control base and the elastic force of the torsion spring work together to provide the operator with a clear, stable, and moderately forceful control feel, avoiding the problem of weak or ineffective control force caused by traditional mechanisms that rely solely on the electronic control base. Furthermore, by rationally selecting torsion spring parameters and finely adjusting its installation position, the control force curve can be made more ergonomic. More importantly, when the control lever is released, the elastic potential energy stored in the torsion spring provides a strong and stable restoring force, driving the control lever accurately and quickly back to the neutral position. This high restoring accuracy significantly reduces reliance on the electronic control base's reset structure, effectively extending the lifespan of the electronic control base and improving the reliability of the entire control system.

[0021] 2. This invention innovatively designs the right control lever to meet the complex functional requirements of the control. Specifically, the right control component forms a simple universal joint mechanism with the connecting plate on the right side of the integral rotating shaft via a pin, giving the right control lever two degrees of rotational freedom: one is forward and backward rotation around the axis of the rotating shaft (main function), and the other is left and right yaw around the axis of the pin connected to the connecting plate (auxiliary hydraulic function). The two actions are independent and can be superimposed, thus easily realizing a complex control mode of forward and backward pushing, left and right yaw, and simultaneous forward, backward, left and right movements.

[0022] 3. Furthermore, the transfer mechanism of this invention serves to adjust the motion ratio and adapt the interface. The U-shaped mounting holes on its auxiliary curved plate allow for flexible adjustment of the effective lever arm, thereby precisely matching and converting the swing stroke of the control lever into the working stroke required by the hydraulic valve core, ensuring accurate hydraulic control response and controllable proportion. The entire compound motion transmission chain has an ingenious structure, few parts, and small space occupation, making it very suitable for installation in a compact vehicle frame layout, achieving a high degree of integration of complex functions within a limited space. Attached Figure Description

[0023] Figure 1 This is a front view of the present invention;

[0024] Figure 2 This is the left view of the present invention;

[0025] Figure 3 This is a top view of the present invention;

[0026] Figure 4 This is a three-dimensional structural diagram of the present invention;

[0027] Figure 5 This is a partial cross-sectional view of a partial structure of the present invention;

[0028] Figure 6 This is a schematic diagram of the three-dimensional structure of the rotating shaft of the present invention;

[0029] Figure 7 This is a three-dimensional structural diagram of the left and right control components of the present invention (a is the left control component, b is the right control component).

[0030] Figure 8 This is a partial front sectional view of the transfer mechanism of the present invention;

[0031] Figure 9 This is a left view of the transfer mechanism of the present invention;

[0032] Figure 10 This is a top view of the transfer mechanism of the present invention;

[0033] Figure 11 This is a three-dimensional structural diagram of the torsion spring of the present invention (c is the left torsion spring, d is the right torsion spring).

[0034] In the diagram: 1-Frame; 2-Shaft; 21-Long shaft; 22-Short shaft; 23-Connecting bend plate; 231-Ear plate; 24-Thin shaft; 3-Left control assembly; 31-Left control lever; 311-Left anti-slip sleeve; 312-Left auxiliary handle; 32-Left bend end; 33-U-shaped plate; 34-Steel cylinder; 4-Right control assembly; 41-Right control lever; 411-Right anti-slip sleeve; 412-Right auxiliary handle; 42-Right bend end; 43-Right mounting bend plate; 44-Pin shaft; 5-Power steering device ; 51-Torsion spring base; 52-Torsion spring; 6-Fisheye bearing ball joint connecting rod; 7-Transfer mechanism; 71-Mounting plate weldment; 72-Rotating cylinder; 73-T-type bushing; 74-Fastening bolt; 75-Rotating base; 76-Square neck bolt; 77-Auxiliary bent plate; 771-U-shaped mounting through hole; 78-Chain link; 8-Hydraulic control valve; 9-Double ball joint connecting rod; 10-Rotating plate; 11-Bearing seat; 100-Electrical control base; 101-Left electrical control base; 102-Right electrical control base. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] like Figures 1 to 11 As shown, the present invention provides a composite action mechanical control mechanism and its assist device, the core of which is to achieve stable, reliable and composite control functions through a highly integrated and mechanically optimized mechanical structure.

[0037] First, regarding the overall mounting frame, the chassis 1 is the skeleton structure used to mount various components on the engineering vehicle. The rotating shaft 2 is supported and rotatably connected to the left and right side plates inside the chassis 1 by two bearing seats 11. Preferably, the bearing seats 11 are diamond-shaped bearing seats, which have the characteristics of compact structure and stable two-point support. One bearing seat 11 is installed on the inner side of the left side plate and the other is installed on the outer side of the right side plate. This arrangement fully considers the limitations of the vehicle interior space and the convenience of overall assembly, ensuring that the supporting span of the rotating shaft 2 is reasonable, the rotational resistance is small, and the operation is smooth.

[0038] Further refining the pivot 2, it is not simply a single long rod, but a single integral component welded together from a long shaft 21, a short shaft 22, and a connecting bend 23 that connects the two and maintains their coaxiality. After welding, the entire assembly is machined to strictly ensure the coaxiality of the two ends of the long shaft 21 and the short shaft 22, which is the foundation for achieving synchronous and precise movement of the left and right control components. A thinner shaft 24 with a smaller diameter is machined at the end of the long shaft 21 furthest from the connecting bend 23. The ends of the thin shaft 24 and the short shaft 22 are respectively used to connect to the bearing seats 11 that rotatably connect the left and right sides. The shaft body of the thin shaft 24 and the connecting bend 23 are used to mount the left control component 3 and the right control component 4, respectively.

[0039] More specifically, such as Figure 4 and Figure 7 As shown, the left control assembly 3 includes a left control lever 31 integrally formed with a left-bent end 32 at the bottom of the left control lever 31. In this embodiment, the left-bent end 32 is formed by bending the bottom of the left control lever 31 (the specific forming structure is as follows). Figure 7 (As shown in Figure a). A U-shaped plate 33 is fixedly connected to the free end of the left curved end 32. Preferably, a steel cylinder 34 is inserted and fixedly installed between the two side plates of the U-shaped plate 33. During installation, the steel cylinder 34 is rotatably fitted onto the thin shaft 24 of the rotating shaft 2, so that the entire left control assembly 3 can rotate around the axis of the thin shaft 24. Coaxial circular holes are opened on both sides of the U-shaped plate 33. The left-side power assist device 5 specifically includes a torsion spring base 51 fixedly installed on the inner side of the left side plate of the frame 1 by bolts, and a left torsion spring 52. One end (left lead-out section) of the left torsion spring 52 is hooked on the hole of the torsion spring base 51, and the other end (right lead-out section) is hooked on the circular hole of the U-shaped plate 33. In this way, when the left control lever 31 is pushed and drives the U-shaped plate 33 to rotate, the left torsion spring 52 will be twisted, so that it generates an elastic force (i.e., control force) that resists rotation and stores the potential energy for reset. Furthermore, the U-shaped plate 33 is connected to a rotating plate 10 via a double-ball joint rod 9. The rotating plate 10 has a square hole that mates with the square input shaft of the left electronic control base 101. Therefore, the forward and backward movement of the left control lever 31 drives the left electronic control base 101 through the double-ball joint rod 9 and the rotating plate 10, and also twists the left torsion spring 52. By precisely adjusting the length of the double-ball joint rod 9, it can be ensured that when the left control lever 31 is in the neutral position (i.e., the vehicle is stationary), the potentiometer neutral position of the left electronic control base 101 coincides with the preload neutral position of the left torsion spring 52 (i.e., the position with the minimum and most stable elasticity), which guarantees the accuracy of the reset position and the consistency of the feel. When the left control lever 31 is released, the elasticity of the left torsion spring 52 becomes the main reset force, driving the left control assembly 3, the rotating plate 10, and the input shaft of the left electronic control base 101 to accurately return to the neutral position, with a powerful and complete reset.

[0040] Furthermore, the right control assembly 4 has a more ingenious structure to achieve its combined functions. It includes a right control lever 41, a right-bent end 42 integrally formed thereon, and a right mounting plate 43 fixedly connected to the free end of the right-bent end 42 (the specific forming structure is as follows...). Figure 7 As shown in Figure b), the machining process is similar to that of the left control lever 31. Specifically, as shown in Figure b... Figure 7 As shown, the right curved end 42 is also made by bending the bottom end of the right control lever 41. The connection method between the right control assembly 4 and the rotating shaft 2 is different from that on the left. Specifically, on the right side of the connecting bent plate 23 of the rotating shaft 2, coaxial holes are provided on its upper and lower end faces. The upper and lower end plates of the right mounting bent plate 43 also have corresponding holes. A pin 44 passes through these holes to hinge the right mounting bent plate 43 and the connecting bent plate 23 together. This forms a universal joint, the principle of which is similar to a simple universal joint. Based on this structure, the right control lever 41 has two independent degrees of rotational freedom: First, when the operator pushes the right control lever 41 back and forth, the entire right control assembly 4 will rotate together with the connecting bend plate 23 and the entire rotating shaft 2 via the pin 44; this is its main control function. Second, when the operator swings the right control lever 41 left and right, the right control assembly 4 (including the right mounting bend plate 43, the right bend end 42, and the right control lever 41) can independently deflect in the left and right directions relative to the connecting bend plate 23 around the axis of the pin 44; this is its auxiliary hydraulic control function. These two actions can be performed independently or simultaneously (i.e., compound actions) without interfering with each other.

[0041] Similar to the left control assembly 3, the right control assembly 4 is also connected to an independent power assist device 5 and an electronic control base transmission mechanism. An ear plate 231 is welded to the inner left side of the connecting bend plate 23. The ear plate 231 has a round hole and is connected to another rotating plate 10 via a double ball joint rod 9. This rotating plate 10 engages with the square shaft of the right electronic control base 102 to transmit the forward and backward movement of the right control lever 41. Simultaneously, a right torsion spring base 51 is fixedly installed on the outer side of the right side plate of the frame 1. One end of the right torsion spring 52 is hooked onto the round hole on the right side of the connecting bend plate 23, and the other end is hooked onto the hole in the right torsion spring base 51. Thus, when the right control lever 41 is pushed forward and backward, it also twists the right torsion spring 52, achieving a similar assist and reset effect as the left side. It should be noted that since the left and right swinging motion of the right control lever 41 is around the pin 44 and does not twist the connecting bend plate 23, it does not interfere with the forward and backward movement channels of the right torsion spring 52 and the right electronic control base 102.

[0042] Further details are provided on how the left-right swing motion of the right control lever 41 is transmitted to the hydraulic control valve 8. A circular hole is provided on the side plate of the right mounting plate 43 away from the pin 44. One end of a fisheye bearing ball joint rod 6 is connected to this circular hole via a ball joint. The other end of the fisheye bearing ball joint rod 6 is connected to a transfer mechanism 7. Further optimized, the transfer mechanism 7 mainly includes a mounting plate weldment 71, a rotating cylinder 72, a T-shaped bushing 73, a fastening bolt 74, a rotating base 75, a square neck bolt 76, and an auxiliary bending plate 77. The mounting plate weldment 71 is fixedly mounted on the frame 1 at a suitable position using bolts. The rotating cylinder 72 is fixedly connected to the mounting plate weldment 71, specifically as follows... Figure 8 As shown, in this embodiment, the rotating cylinder 72 is fixedly connected to a cantilever integrally formed on one end of the top surface of the mounting plate weldment 71 through welding or other processes; then, the rotating base 75 is fitted into the rotating cylinder 72 through a T-shaped bushing 73; next, a fastening bolt 74 for axially limiting the rotating base 75 is screwed into the top surface of the rotating cylinder 72. Thus, as... Figure 8 As shown, the rotating base 75 can be rotatably connected to the rotating cylinder 72 via a bearing or bushing (a T-shaped bushing 73 is used in this embodiment).

[0043] Furthermore, the auxiliary curved plate 77 has a U-shaped mounting through hole 771 on its top surface, through which the lever arm can be adjusted, providing a preliminary reference for subsequent stroke ratio adjustment. Specifically, as shown... Figure 8 and Figure 10 As shown, the auxiliary bent plate 77 is fixedly mounted to the rotating base 75 through the U-shaped mounting through hole 771 and the square neck bolt 76. The square neck portion of the square neck bolt 76 engages with the square hole on the rotating base 75 to prevent bolt rotation and facilitate tightening of the nut. Since the U-shaped mounting through hole 771 is an elongated hole, the relative mounting positions of the auxiliary bent plate 77 and the rotating base 75 along their length can be adjusted through this U-shaped mounting through hole 771, thereby adjusting the rotation arm of the auxiliary bent plate 77.

[0044] Furthermore, one end of the auxiliary bend plate 77 has a round hole, which is connected to the valve core of the hydraulic control valve 8 via a chain link 78; the other end is bent to form an ear plate, which has a round hole for connecting the fisheye bearing ball joint rod 6 from the right mounting bend plate 43.

[0045] Therefore, when the operator swings the right control lever 41 left or right, the right mounting plate 43 swings accordingly. This swings the ball joint of the fisheye bearing 6, pulling or pushing one end of the auxiliary plate 77, causing the auxiliary plate 77 and the rotating base 75 to rotate together about the axis of the rotating cylinder 72. This, in turn, drives the rotation of the other end of the auxiliary plate 77, which in turn pushes or pulls the valve core of the hydraulic control valve 8 via the chain link 78 at the other end, thus achieving hydraulic function control. The intermediate mechanism 7 here plays a crucial lever adjustment role: the hole on the auxiliary plate 77 for installing the square neck bolt 76 is a U-shaped elongated hole. By adjusting the fastening position of the square neck bolt 76 and the U-shaped mounting through hole 771, the effective lever arm length of the auxiliary plate 77 can be changed, thereby changing the proportional relationship between the input swing displacement and the output valve core linear displacement, i.e., the stroke gain is adjustable. This allows the same control mechanism to be adapted to hydraulic valves with different stroke requirements, improving versatility.

[0046] Furthermore, to further enhance operational comfort, non-slip rubber or plastic anti-slip sleeves 311 and 411 are fitted to the free ends of both the left and right control levers 31 and 41. Preferably, these sleeves are positioned above or to the side of the main grip area on the left and right control levers 31 and 41. Figure 1 and Figure 2 As shown in the diagram, a left auxiliary handle 312 and a right auxiliary handle 412 are also provided. These auxiliary handles can be fixed by means of threaded connection or snap-fit, providing operators with more diverse grip options to adapt to different hand sizes, different operating habits, or the need to change grip posture during long-term operation, effectively reducing operator fatigue.

[0047] In summary, this invention, through an integral rotating shaft, an independent torsion spring assist device, a universally connected right-hand control assembly, and a central transfer mechanism including an adjustable proportional lever, constitutes a high-performance mechanical control system with a compact structure, stable operating force, reliable reset, and the ability to flexibly realize single and compound actions. It is particularly suitable for space-constrained mini skid steer loaders, backhoe loaders, and other engineering vehicles, significantly improving the overall handling quality and user experience.

[0048] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A composite motion mechanical control mechanism and its assist device, wherein the control mechanism is used to connect to and operate an electronic control base (100) mounted on an engineering vehicle to perform actions, thereby further controlling the engineering vehicle to perform operations, the engineering vehicle further comprising a frame (1); characterized in that: The operating mechanism includes a rotating shaft (2) rotatably connected to both sides of the frame (1) via a bearing seat (11), a left operating component (3) and a right operating component (4) respectively connected to the two ends of the rotating shaft (2), and an electronic control base (100) including a left electronic control base (101) and a right electronic control base (102) respectively connected to the left operating component (3) and the right operating component (4); the operating mechanism is connected to the left and right sides of the frame (1) via two sets of resistance devices (5), which have a certain elastic restoring force, so that when the relevant operating components are moved, there is a certain operating force, and when the relevant operating components are released, there is a certain restoring force.

2. The mechanical operating mechanism and its assist device according to claim 1, characterized in that: Each set of the resistance devices (5) includes a torsion spring base (51) fixedly installed inside the frame (1) and a torsion spring (52) connected between the torsion spring base (51) and the operating mechanism.

3. The mechanical operating mechanism and its assist device according to claim 1, characterized in that: The rotating shaft (2) includes a long shaft (21) and a short shaft (22), which are fixedly connected by a connecting bend plate (23) and are coaxially arranged. The end of the long shaft (21) away from the connecting bend plate (23) forms a thin shaft (24) with a diameter smaller than that of the long shaft (21). The end of the thin shaft (24) and the end of the short shaft (22) are rotatably connected to the left and right bearing seats (11) respectively. The thin shaft (24) and the connecting bend plate (23) are used to connect the left operating component (3) and the right operating component (4) respectively.

4. The mechanical operating mechanism and its assist device according to claim 3, characterized in that: The left control assembly (3) includes a left control lever (31) and a left curved end (32) integrally formed at the bottom of the left control lever (31). A U-shaped plate (33) is fixedly connected to the free end of the left curved end (32). A steel cylinder (34) is fixedly connected to both sides of the U-shaped plate (33), and the steel cylinder (34) is rotatably fitted into the thin shaft (24). The U-shaped plate (33) is connected to the left electric control base (101) in sequence through a double ball joint connecting rod (9) and a rotating plate (10).

5. The mechanical operating mechanism and its assist device according to claim 4, characterized in that: The free end of the left control lever (31) is fitted with a left anti-slip sleeve (311), and the free end of the left control lever (31) is also provided with a left auxiliary handle (312).

6. The mechanical operating mechanism and its assist device according to claim 3, characterized in that: The right control assembly (4) includes a right control lever (41), a right curved end (42) integrally formed on the right control lever (41), and a right mounting plate (43) fixedly connected to the free end of the right curved end (42). The right mounting plate (43) is connected to the connecting plate (23) of the rotating shaft (2). The right mounting plate (43) is connected to the right electric control base (102) in sequence through a double ball joint connecting rod (9) and a rotating plate (10).

7. The mechanical operating mechanism and its assist device according to claim 6, characterized in that: The free end of the right control lever (41) is fitted with a right anti-slip sleeve (411), and the free end of the right control lever (41) is also provided with a right auxiliary handle (412).

8. The mechanical operating mechanism and its assist device according to claim 5, characterized in that: The upper and lower end plates of the right mounting bend plate (43) are rotated to the upper and lower end faces of the connecting bend plate (23) via a pin (44); the side plate of the right mounting bend plate (43) away from the pin (44) is connected to the hydraulic control valve (8) in sequence via a fisheye shaft bearing ball joint rod (6) and a transfer mechanism (7), so that the operator can swing the right control lever (41) to pull the hydraulic control valve (8) to operate.

9. The mechanical operating mechanism and its assist device according to claim 8, characterized in that: The transfer mechanism (7) includes a mounting plate weldment (71) fixedly mounted on the frame (1), a rotating cylinder (72) fixedly connected to the mounting plate weldment (71), and a rotating base (75) fitted into the rotating cylinder (72) by a T-shaped bushing (73). The top surface of the rotating cylinder (72) is threaded with a fastening bolt (74) for axially limiting the rotating base (75). The top surface of the rotating base (75) is fitted with an auxiliary bending plate (77) by a square neck bolt (76). The end of the auxiliary bending plate (77) away from the mounting plate weldment (71) is connected to the right mounting bending plate (43) by a fisheye shaft bearing ball joint (6). The end of the auxiliary bending plate (77) near the mounting plate weldment (71) is connected to the valve core of the hydraulic control valve (8) by a chain link (78).

10. The mechanical operating mechanism and its assist device according to claim 9, characterized in that: The top surface of the auxiliary bent plate (77) forms a U-shaped mounting through hole (771), and the auxiliary bent plate (77) is fixedly mounted to the rotating base (75) through the U-shaped mounting through hole (771) and the square neck bolt (76).

Images