A hand operated emergency brake mechanism

Abstract

The present application belongs to diesel engine technical field, especially, relate to a kind of manual emergency brake mechanism, including support seat, respectively rotating installation in support seat's mounting seat and movable rocker, mounting seat and movable rocker coaxial arrangement, rotating limiting structure is arranged between movable rocker and mounting seat, rotating limiting structure includes the rocker limiting structure being arranged in movable rocker, the seat body limiting structure being arranged in mounting seat, rocker limiting structure and seat body limit structure can be combined / separated, still include brake handle being connected to mounting seat, handle limiting structure being fixed to mounting seat, handle limiting structure is equipped with throttle limiting structure, brake limiting structure, and throttle limiting structure is arranged along the rotation direction of mounting seat interval, brake handle can be combined / separated with throttle limiting structure, brake limiting structure respectively;It has solved the problem that existing throttle control mechanism cannot quickly realize emergency brake and when throttle is adjusted, throttle adjustment is too large, and diesel engine can be more safely controlled.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of diesel engines, and particularly relates to a manual emergency brake mechanism. BACKGROUND

[0002] At present, diesel engines are widely applied to provide power for transport vehicles, ships, engineering machinery and agricultural machinery, and many diesel engines are adjusted in output power by adjusting the throttle opening size through a throttle control mechanism.

[0003] The existing throttle control mechanism is prone to the problem of excessive throttle adjustment when the throttle is adjusted to be large, and cannot quickly realize emergency braking when the diesel engine encounters emergency situations such as runaway, cylinder pulling, shaft holding and abnormal operation parameters, which seriously affects the safety of the diesel engine and damages other equipment. SUMMARY

[0004] The application aims to solve the problems of the existing throttle control mechanism that cannot quickly realize emergency braking and is prone to excessive throttle adjustment when the throttle is adjusted to be large, and can more safely control the diesel engine.

[0005] The application discloses a manual emergency brake mechanism, which comprises a supporting seat, a mounting seat and a movable rocker arm rotatably installed on the supporting seat, the mounting seat and the movable rocker arm are coaxially arranged, a rotation limiting structure is arranged between the movable rocker arm and the mounting seat, the rotation limiting structure comprises a rocker arm limiting structure arranged on the movable rocker arm and a seat body limiting structure arranged on the mounting seat, the rocker arm limiting structure and the seat body limiting structure can be combined or separated; a brake handle connected to the mounting seat and a handle limiting structure fixed to the mounting seat are further included, the handle limiting structure is provided with a throttle limiting structure and a brake limiting structure which are arranged at intervals along the rotation direction of the mounting seat, the brake handle can be combined with or separated from the throttle limiting structure and the brake limiting structure; when the diesel engine is running, the brake handle is arranged at the throttle limiting structure and combined with the throttle limiting structure, the rocker arm limiting structure is separated from the seat body limiting structure, and the movable rocker arm can be rotated in the direction close to or away from the seat body limiting structure; when emergency braking, the brake handle is separated from the throttle limiting structure and turned to the brake limiting structure, the seat body limiting structure is combined with the rocker arm limiting structure to push the movable rocker arm to rotate and reduce the throttle, and the brake handle is rotated to the brake limiting structure and combined with the brake limiting structure.

[0006] As an improvement, the rocker arm limiting structure is a rocker arm stop block fixed to the movable rocker arm, and the seat body limiting structure is a seat body stop block fixed to the mounting seat.

[0007] As an improvement, the adjacent sides of the rocker arm stop block and the seat body stop block are set as fitting planes, and the fitting plane of the rocker arm stop block and the fitting plane of the seat body stop block are in a combined state when they fit together.

[0008] As an improvement, the mounting seat is provided with a first seat body ring and a second seat body ring coaxially arranged at intervals, and the axes of the first seat body ring and the second seat body ring are arranged in the same direction as the rotation axis of the mounting seat; the movable rocker arm is provided with a rocker arm ring, and the axis of the rocker arm ring is arranged in the same direction as the rotation axis of the movable rocker arm; a mounting shaft is fixedly installed on the support seat, the rocker arm ring is arranged between the first seat body ring and the second seat body ring, and the first seat body ring, the rocker arm ring and the second seat body ring are rotatably installed on the mounting shaft.

[0009] As an improvement, the mounting seat is connected to the first seat body collar, the second seat body collar, and the seat body stop block as an integrated structure, and the movable rocker arm is connected to the rocker arm collar and the rocker arm stop block as an integrated structure.

[0010] As an improvement, the mounting shaft is a double-headed screw, and a threaded hole is provided on the support seat. The threaded portion of one end of the double-headed screw is installed in the threaded hole. The first seat body ring, the rocker arm ring, and the second seat body ring are sleeved on the double-headed screw. A limiting bolt is provided at the threaded portion of the double-headed screw away from one end of the support seat, which is used to limit the first seat body ring, the rocker arm ring, and the second seat body ring to the double-headed screw.

[0011] As an improvement, the handle limiting structure comprises an inner arc-shaped baffle arranged near one side of the support seat, an outer arc-shaped baffle arranged in a spaced manner with the inner arc-shaped baffle, a first connecting rod and a second connecting rod respectively connected between two end portions of the inner arc-shaped baffle and two end portions of the outer arc-shaped baffle, and an arc-shaped protrusion fixed to the inner arc-shaped baffle near the outer arc-shaped baffle or the outer arc-shaped baffle near the inner arc-shaped baffle, a spacing being provided between two end portions of the arc-shaped protrusion and the first connecting rod and the second connecting rod, an accelerator limiting slot being formed between an end portion of the arc-shaped protrusion and the first connecting rod, the accelerator limiting structure being the accelerator limiting slot, a brake limiting slot being formed between the end portion of the arc-shaped protrusion and the second connecting rod, the brake limiting structure being the brake limiting slot, and the accelerator limiting structure being located above the brake limiting structure; the brake handle is rotatably installed on the mounting seat and penetrates the region between the inner arc-shaped baffle, the first connecting rod, the outer arc-shaped baffle and the second connecting rod, and can rotate between the inner arc-shaped baffle and the outer arc-shaped baffle.

[0012] As an improvement, a connecting plate is arranged between the support seat and the inner arc-shaped baffle.

[0013] As an improvement, the arc-shaped protrusion is arranged on the side of the inner arc-shaped baffle near the outer arc-shaped baffle, and the arc-shaped protrusion is connected with the connecting plate as a whole.

[0014] As an improvement, the mounting seat is provided with a mounting groove, and the mounting end of the brake handle is rotatably installed in the mounting groove.

[0015] After the above technical scheme is adopted, the application has the following beneficial effects:

[0016] When installed, the support seat of the manual emergency brake mechanism is fixed to the connecting seat of the connecting seat assembly on the corresponding side of the handle operating assembly, and a fourth connecting rod is arranged between the movable rocker arm of the manual emergency brake mechanism and the handle operating assembly, both ends of the fourth connecting rod being rotatably connected with the movable rocker arm and the handle operating assembly respectively. After the brake handle is rotated to the throttle limiting structure and combined with the throttle limiting structure, the movable rocker arm can be rotated in the direction of approaching / away from the seat limiting structure due to the separation of the rocker arm limiting structure and the seat limiting structure. Whether the throttle is adjusted automatically by the automatic adjusting rocker arm or manually by the handle operating assembly, the movable rocker arm can be rotated through the fourth connecting rod, and the throttle adjustment will not be affected. Moreover, after the brake handle is combined with the throttle limiting structure, the position of the seat limiting structure is fixed and unchanged, which can limit the maximum throttle position and avoid the problem of excessive throttle adjustment when the throttle is adjusted.

[0017] The manual emergency brake mechanism of the embodiment of the present application solves the problems that the existing throttle control mechanism cannot quickly realize emergency braking and the problem of excessive throttle adjustment when the throttle is adjusted, and can more safely control the diesel engine. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a three-dimensional structural schematic view of the brake handle of the manual emergency brake mechanism of the embodiment of the present application in a maximum throttle limiting position state;

[0019] Figure 2 is a three-dimensional structural schematic view of the brake handle of the manual emergency brake mechanism of the embodiment of the present application in a braking state;

[0020] Figure 3 is an exploded structural schematic view of the movable rocker arm, the mounting seat and the brake handle of the manual emergency brake mechanism of the embodiment of the present application;

[0021] Figure 4 is an installation schematic view of the manual emergency brake mechanism of the embodiment of the present application;

[0022] Wherein, 10, support seat; 11, mounting shaft; 20, mounting seat; 21, seat body stop block; 22, first seat body collar; 23, second seat body collar; 24, mounting groove; 25, mounting hole; 30, movable rocker arm; 31, rocker arm stop block; 32, rocker arm collar; 40, brake handle; 41, pin shaft; 51, inner arc-shaped baffle; 52, outer arc-shaped baffle; 53, first connecting rod; 54, second connecting rod; 55, arc-shaped protrusion; 56, throttle limiting clamping groove; 57, brake clamping groove; 58, connecting plate; 60, transmission shaft assembly; 61, automatic adjusting rocker arm; 62, connecting rocker arm; 70, throttle pull rod; 81, connecting seat; 82, rotating shaft; 83, input rocker arm; 84, output rocker arm; 85, first connecting rod; 86, second connecting rod; 87, third connecting rod; 90, handle operating assembly; 91, manual rocker arm; 92, handle; 93, fourth connecting rod; 94, mounting arm. DETAILED DESCRIPTION

[0023] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0024] Figures 1 to 4 is a structural schematic diagram of a manual emergency brake mechanism of an embodiment of the present application, wherein, Figure 1 shows a perspective structural schematic diagram of a manual emergency brake mechanism of an embodiment of the present application in a maximum throttle limiting position state, Figure 2 shows a perspective structural schematic diagram of a manual emergency brake mechanism of an embodiment of the present application in a brake state, Figure 3 shows an exploded structural schematic diagram of a movable rocker arm, a mounting seat and a brake handle of a manual emergency brake mechanism of an embodiment of the present application, Figure 4 shows a mounting schematic diagram of a manual emergency brake mechanism of an embodiment of the present application. For the convenience of description, only the parts related to the present application are shown in the figure.

[0025] It should be noted that the directional indications (such as up, down, front, back, etc.) involved in the present application are only used to explain the relative positional relationship between the components in a certain specific posture, and if the specific posture changes, the directional indications also change accordingly; if the description of “first”, “second” and the like is involved in the present application, the description of “first”, “second” and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features.

[0026] As Figure 1 , Figure 2 and Figure 3As shown, the embodiment of the present application discloses a kind of manual emergency brake mechanism, it is applied to the throttle control mechanism of diesel engine, including support seat 10, respectively rotating installation in the mounting seat 20 and movable rocker arm 30 of support seat 10, mounting seat 20 and movable rocker arm 30 coaxial arrangement, rotating limiting structure is arranged between movable rocker arm 30 and mounting seat 20, the rotating limiting structure includes the rocker arm limiting structure being arranged in movable rocker arm 30, the seat body limiting structure being arranged in mounting seat 20, rocker arm limiting structure and seat body limit structure can be combined / separated;It further includes brake handle 40 being connected to mounting seat 20, handle limiting structure being fixed to mounting seat 20, the handle limiting structure is equipped with throttle limiting structure, brake limiting structure, which is spaced apart along the rotating direction of mounting seat 20, brake handle 40 can be combined / separated with throttle limiting structure, brake limiting structure respectively;When diesel engine operates, brake handle 40 is arranged at throttle limiting structure and combined with throttle limiting structure, rocker arm limiting structure and seat body limit structure are separated, the included angle α is arranged between rocker arm limiting structure and seat body limiting structure, movable rocker arm 30 can be rotated in the direction of approaching / away from seat body limiting structure;When emergency brake, brake handle 40 is separated from throttle limiting structure and is diverted to brake limiting structure, seat body limiting structure and rocker arm limiting structure are combined to push movable rocker arm 30 to rotate and reduce throttle, brake handle 40 is rotated to brake limiting structure and combined with brake limiting structure.

[0027] For easy understanding, in combination with Figure 4 The installation and connection of manual emergency brake mechanism are as follows:

[0028] When diesel engine is V-type diesel engine, as Figure 4As shown, the throttle control mechanism of the diesel engine comprises a transmission shaft assembly 60, two groups of throttle pull rods 70 respectively arranged at two ends of the transmission shaft assembly 60, an automatic adjusting rocker 61 and a handle operating assembly 90 fixed at one end of the transmission shaft assembly 60, and a connecting rocker 62 fixed at the other end of the transmission shaft assembly 60, and a connecting seat assembly is arranged between the handle operating assembly 90, the connecting rocker 62 and the throttle pull rod 70 of the corresponding side, wherein the automatic adjusting rocker 61 is connected with a speed regulator (not shown in the figure), and the throttle pull rod 70 is connected with a rack of an injection pump; the connecting seat assembly comprises a connecting seat 81, a rotating shaft 82 rotatably installed on the connecting seat 81, and an input rocker 83 and an output rocker 84 respectively fixed at two ends of the rotating shaft 82; a first connecting rod 85 is arranged between the output rocker 84 and the throttle pull rod 70, and two ends of the first connecting rod 85 are rotatably connected with the output rocker 84 and the throttle pull rod 70 respectively; a second connecting rod 86 is arranged between the handle operating assembly 90 and the input rocker 83 of the corresponding side, and two ends of the second connecting rod 86 are rotatably connected with the handle operating assembly 90 and the input rocker 83 of the corresponding side respectively; a third connecting rod 87 is arranged between the connecting rocker 62 and the input rocker 83 of the corresponding side, and two ends of the third connecting rod 87 are rotatably connected with the connecting rocker 62 and the input rocker 83 of the corresponding side respectively; when adjusting the throttle, whether the throttle is automatically adjusted by the automatic adjusting rocker 61 or manually adjusted by the handle operating assembly 90, both groups of throttle pull rods 70 can be simultaneously and synchronously moved in the same direction.

[0029] When installed, the support seat 10 of the manual emergency brake mechanism is fixed to the connecting seat 81 of the connecting seat assembly of the corresponding side of the handle operating assembly 90, and a fourth connecting rod 93 is arranged between the movable rocker 30 of the manual emergency brake mechanism and the handle operating assembly 90, and two ends of the fourth connecting rod 93 are rotatably connected with the movable rocker 30 and the handle operating assembly 90 respectively.

[0030] When the brake handle 40 is combined with the throttle limiting structure at the throttle limiting position, the movable rocker arm 30 can be rotated in the direction of approaching / away from the seat limiting structure due to the separation of the rocker arm limiting structure and the seat limiting structure, and the rotation of the movable rocker arm 30 can be driven by the fourth connecting rod 93 regardless of automatic adjustment of the throttle by the automatic adjustment rocker arm 61 or manual adjustment of the throttle by the handle operating assembly 90, and the adjustment of the throttle will not be affected. In addition, after the brake handle 40 is combined with the throttle limiting structure, the position of the seat limiting structure is fixed and unchanged, which can limit the maximum throttle position and avoid the problem of excessive adjustment of the throttle when the throttle is adjusted. When emergency braking, the brake handle 40 is separated from the throttle limiting structure and rotated to the brake limiting structure, and the seat limiting structure is combined with the rocker arm limiting structure to push the movable rocker arm 30 to rotate, which can reduce the throttle to zero by the fourth connecting rod 93 and the handle operating assembly 90, and quickly realize emergency braking, which is convenient to operate. The manual emergency braking mechanism of the embodiment of the present application solves the problems that the existing throttle control mechanism cannot quickly realize emergency braking and the throttle is excessively adjusted when the throttle is adjusted, and can more safely control the diesel engine.

[0031] In order to facilitate installation and manual adjustment, the handle operating assembly 90 includes a manual rocker arm 91 fixed to the end of the transmission shaft assembly 60, a handle 92 fixed to the manual rocker arm 91, an installation arm 94 provided on the side of the manual rocker arm 91 away from the handle 92, and a fourth connecting rod 93 connected between the installation arm 94 and the input rocker arm 83.

[0032] When the diesel engine is a straight diesel engine, only one end of the transmission shaft assembly 60 needs to be provided with the connecting seat assembly and the throttle pull rod 70.

[0033] In the embodiment of the present application, the handle limiting structure includes an inner arc-shaped baffle 51 provided on the side close to the support seat 10, an outer arc-shaped baffle 52 provided in a spaced manner with the inner arc-shaped baffle 51, a first connecting rod 53 and a second connecting rod 54 respectively connected between the two end portions of the inner arc-shaped baffle 51 and the two end portions of the outer arc-shaped baffle 52, and an arc-shaped protrusion 55 fixed to the side of the inner arc-shaped baffle 51 close to the outer arc-shaped baffle 52 or the side of the outer arc-shaped baffle 52 close to the inner arc-shaped baffle 51. A spacing is provided between the two end portions of the arc-shaped protrusion 55 and the first connecting rod 53 and the second connecting rod 54. The throttle limiting slot 56 formed between the end portion of the arc-shaped protrusion 55 and the first connecting rod 53 is the throttle limiting structure, the brake slot 57 formed between the end portion of the arc-shaped protrusion 55 and the second connecting rod 54 is the brake limiting structure, and the throttle limiting structure is located above the brake limiting structure. The brake handle 40 is rotatably installed on the mounting seat 20 and penetrates the region between the inner arc-shaped baffle 51, the first connecting rod 53, the outer arc-shaped baffle 52 and the second connecting rod 54, and can be rotated between the inner arc-shaped baffle 51 and the outer arc-shaped baffle 52.

[0034] In order to facilitate the handle limiting structure and the support base 10 to be fixedly connected, a connecting plate 58 is arranged between the support base 10 and the inner arc-shaped baffle 51, and further, the arc-shaped protrusion 55 is arranged on the side of the inner arc-shaped baffle 51 close to the outer arc-shaped baffle 52, and the arc-shaped protrusion 55 is connected with the connecting plate 58 as an integral structure.

[0035] Specifically, the mounting seat 20 is provided with a mounting groove 24, and the mounting end of the brake handle 40 is rotatably mounted in the mounting groove 24. Usually, mounting holes 25 are respectively arranged on the two side walls of the mounting groove 24, and a stringing hole is arranged on the mounting end of the brake handle 40, and the mounting end of the brake handle 40 is rotatably connected through a pin shaft 41.

[0036] In other embodiments, the handle limiting structure can also be provided as follows: an arc-shaped support plate is fixed to the support base 10, first and second spring plungers are fixed to the arc-shaped support plate at intervals in the circumferential direction, a first limiting column fixed to the arc-shaped support plate is arranged on the side of the first spring plunger away from the second spring plunger, and a second limiting column fixed to the arc-shaped support plate is arranged on the side of the second spring plunger away from the first spring plunger; the brake handle 40 is fixed to the mounting seat 20 and arranged between the first and second limiting columns, and a recess for the ball of the first spring plunger and the ball of the second spring plunger is arranged on the side of the brake handle 40 corresponding to the arc-shaped support plate, the first spring plunger and the recess form a throttle limiting structure, and the second spring plunger and the recess form a brake limiting structure.

[0037] In the embodiment of the present application, as shown in Figure 3 In order to facilitate installation, the first and second seat body sleeve rings 22 and 23 are coaxially arranged on the mounting seat 20, the axes of the first and second seat body sleeve rings 22 and 23 are arranged in the same direction as the rotation axis of the mounting seat 20, the rocker arm sleeve ring 32 is arranged on the movable rocker arm 30, the axis of the rocker arm sleeve ring 32 is arranged in the same direction as the rotation axis of the movable rocker arm 30, the mounting shaft 11 is arranged on the support base 10, the rocker arm sleeve ring 32 is arranged between the first and second seat body sleeve rings 22 and 23, and the first seat body sleeve ring 22, the rocker arm sleeve ring 32 and the second seat body sleeve ring 23 are rotatably mounted on the mounting shaft 11.

[0038] Specifically, the mounting shaft 11 is a double-headed screw, a threaded hole is arranged on the support base 10, the threaded part of one end of the double-headed screw is mounted in the threaded hole, the first seat body sleeve ring 22, the rocker arm sleeve ring 32 and the second seat body sleeve ring 23 are sleeved on the double-headed screw, and a limiting bolt is arranged at the threaded part of the end of the double-headed screw away from the support base 10, for limiting the first seat body sleeve ring 22, the rocker arm sleeve ring 32 and the second seat body sleeve ring 23 on the double-headed screw.

[0039] As shown in Figure 1 and Figure 3As shown, the rocker arm limiting structure is a rocker arm stop block 31 fixed to the movable rocker arm 30, and the seat limiting structure is a seat stop block 21 fixed to the mounting seat 20. Further, the adjacent sides of the rocker arm stop block 31 and the seat stop block 21 are provided with abutting planes, and the abutting planes of the rocker arm stop block 31 and the seat stop block 21 are in abutment when in the combined state.

[0040] Generally, the mounting seat 20 is connected with the first seat sleeve ring 22, the second seat sleeve ring 23 and the seat stop block 21 as an integral structure, and the movable rocker arm 30 is connected with the rocker arm sleeve ring 32 and the rocker arm stop block 31 as an integral structure, which is convenient for processing and production.

[0041] The above is an example of the best embodiment of the present application, wherein the parts not described in detail are all common knowledge of ordinary skilled in the art. The protection scope of the present application is subject to the content of the claims, and any equivalent transformation based on the technical inspiration of the present application is also within the protection scope of the present application.

Claims

1. A hand-operated emergency brake mechanism, characterized in that The application relates to a support seat (10), a mounting seat (20) and a movable rocker arm (30) which are coaxially arranged on the support seat (10), a rotary limiting structure is arranged between the movable rocker arm (30) and the mounting seat (20), the rotary limiting structure comprises a rocker arm limiting structure arranged on the movable rocker arm (30) and a seat body limiting structure arranged on the mounting seat (20), the rocker arm limiting structure and the seat body limiting structure can be combined or separated, a brake handle (40) is connected to the mounting seat (20), a handle limiting structure is fixed to the mounting seat (20), the handle limiting structure is provided with a throttle limiting structure and a brake limiting structure which are arranged along the rotary direction of the mounting seat (20), the brake handle (40) can be combined with or separated from the throttle limiting structure and the brake limiting structure, when the diesel engine is running, the brake handle (40) is arranged at the throttle limiting structure and combined with the throttle limiting structure, the rocker arm limiting structure is separated from the seat body limiting structure, and the movable rocker arm (30) can be rotated towards or away from the seat body limiting structure; when emergency braking is performed, the brake handle (40) is separated from the throttle limiting structure and is turned to the brake limiting structure, the seat body limiting structure and the rocker arm limiting structure are combined to push the movable rocker arm (30) to rotate and reduce the throttle, and the brake handle (40) is turned to the brake limiting structure to close the throttle and is combined with the brake limiting structure.

2. A manual emergency brake mechanism as claimed in claim 1, characterised in that, The rocker arm limiting structure is a rocker arm stop block (31) fixed to the movable rocker arm (30), and the seat body limiting structure is a seat body stop block (21) fixed to the mounting seat (20).

3. A manual emergency brake mechanism as claimed in claim 2, wherein, The adjacent sides of the rocker arm stop block (31) and the seat body stop block (21) are provided with abutting planes, and the abutting planes of the rocker arm stop block (31) and the seat body stop block (21) are combined when the abutting planes are abutted.

4. The manual emergency brake mechanism of claim 2, wherein, The mounting seat (20) is provided with coaxially arranged first and second seat body sleeve rings (22) and (23), the axes of the first and second seat body sleeve rings (22) and (23) are arranged in the same direction as the rotary axis of the mounting seat (20), the movable rocker arm (30) is provided with a rocker arm sleeve ring (32), the axis of the rocker arm sleeve ring (32) is arranged in the same direction as the rotary axis of the movable rocker arm (30), a mounting shaft (11) is fixedly arranged on the support seat (10), the rocker arm sleeve ring (32) is arranged between the first and second seat body sleeve rings (22) and (23), and the first seat body sleeve ring (22), the rocker arm sleeve ring (32) and the second seat body sleeve ring (23) are rotatably arranged on the mounting shaft (11).

5. The manual emergency brake mechanism according to claim 4, characterized in that: The mounting seat (20) is connected with the first seat body sleeve ring (22), the second seat body sleeve ring (23) and the seat body stop block (21) as an integral structure, and the movable rocker arm (30) is connected with the rocker arm sleeve ring (32) and the rocker arm stop block (31) as an integral structure.

6. The manual emergency brake mechanism of claim 4, wherein, The mounting shaft (11) is a double-headed screw rod, a threaded hole is arranged on the support seat (10), a threaded portion of one end of the double-headed screw rod is mounted in the threaded hole, the first seat body sleeve ring (22), the rocker arm sleeve ring (32) and the second seat body sleeve ring (23) are sleeved on the double-headed screw rod, and a limiting bolt is arranged at a threaded portion of an end of the double-headed screw rod away from the support seat (10) to limit the first seat body sleeve ring (22), the rocker arm sleeve ring (32) and the second seat body sleeve ring (23) on the double-headed screw rod.

7. A hand operated emergency brake mechanism as claimed in any one of claims 1 to 6, characterised in that, The handle limiting structure comprises an inner arc-shaped baffle (51) arranged on one side close to the support seat (10), an outer arc-shaped baffle (52) arranged in a spaced manner with the inner arc-shaped baffle (51), a first connecting rod (53) and a second connecting rod (54) respectively connected between two end portions of the inner arc-shaped baffle (51) and two end portions of the outer arc-shaped baffle (52), and an arc-shaped protrusion (55) fixed to one side of the inner arc-shaped baffle (51) close to the outer arc-shaped baffle (52) or one side of the outer arc-shaped baffle (52) close to the inner arc-shaped baffle (51), a spacing is arranged between two end portions of the arc-shaped protrusion (55) and the first connecting rod (53) and the second connecting rod (54), an accelerator limiting clamping groove (56) formed between an end portion of the arc-shaped protrusion (55) and the first connecting rod (53) is the accelerator limiting structure, a brake clamping groove (57) formed between an end portion of the arc-shaped protrusion (55) and the second connecting rod (54) is the brake limiting structure, and the accelerator limiting structure is located above the brake limiting structure; the brake handle (40) is rotatably mounted on the mounting seat (20) and penetrates a region between the inner arc-shaped baffle (51), the first connecting rod (53), the outer arc-shaped baffle (52) and the second connecting rod (54) and can rotate between the inner arc-shaped baffle (51) and the outer arc-shaped baffle (52).

8. A manual emergency brake mechanism as claimed in claim 7, characterised in that, A connecting plate (58) is arranged between the support seat (10) and the inner arc-shaped baffle (51).

9. A manual emergency brake mechanism as claimed in claim 8, wherein, The arc-shaped protrusion (55) is arranged on one side of the inner arc-shaped baffle (51) close to the outer arc-shaped baffle (52), and the arc-shaped protrusion (55) is connected with the connecting plate (58) as an integral structure.

10. The manual emergency brake mechanism of claim 7, wherein, The mounting seat (20) is provided with a mounting groove (24), and a mounting end of the brake handle (40) is rotatably mounted in the mounting groove (24).

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