Safety locking mechanism for engineering machinery seat

Abstract

The utility model belongs to the technical field of engineering machinery accessories, and particularly discloses a safety locking mechanism of an engineering machinery seat, which comprises a cab mounting plate, a safety locking rod, a fixed support and a gas spring, the fixed support is fixedly connected to the cab mounting plate, and the safety locking rod is hinged to the fixed support; the safety locking rod is in a U shape, and the two sides of the safety locking rod are bent in an L shape. One end of the gas spring is hinged to the fixing support, the other end of the gas spring is hinged to the safety locking rod, and the safety locking rod achieves switching between a downward turning working state and an upward turning shutdown state through the gas spring. The safety locking rod comprises a framework and a protection pad, the framework is wrapped with the protection pad, the safety locking rod is turned upwards before use, when the safety locking rod is used, a person enters the inner side of the safety locking rod and is turned downwards to a downward turning working state, the safety locking rod encloses the person and provides safety protection, and the protection pad provides flexible support for the human body. And the fatigue feeling caused by long-time operation of the whole machine is relieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering machinery accessories, in particular to a safety locking mechanism for an engineering machinery seat. Background Art

[0002] There are currently a variety of technical solutions for the design and application of safety locking rods for construction machinery seats. Traditional safety locking rods usually adopt a mechanical structure, which fixes the seat to the vehicle body by physically locking it to prevent the seat from moving during vehicle driving or operation. This mechanical locking rod has a simple structure and is easy to operate, but it has some inherent limitations; the skid steer loader is a small device that is flexible and can operate in a small space. To ensure the safety of the driver, the seat position needs to be equipped with a safety locking mechanism.

[0003] The reliability, comfort and operational convenience of the safety locking mechanism at the seat of the existing skid steer loader need to be improved; the driver will feel tired when operating the whole machine, there will be certain safety hazards when the whole machine is working, and the driver cannot be well protected. Utility Model Content

[0004] Aiming at the problem that the reliability, comfort and operation convenience of the safety locking mechanism of the seat in the engineering vehicle in the prior art need to be improved, a safety locking mechanism for the seat of the engineering machinery is proposed. The utility model provides the following technical solutions:

[0005] A safety locking mechanism for an engineering machinery seat comprises a cab mounting plate, a safety locking rod, a fixed bracket and a gas spring, wherein the fixed bracket is fixedly connected to the cab mounting plate, and the safety locking rod is hinged to the fixed bracket; the safety locking rod is U-shaped, and both sides are bent in an L-shape; one end of the gas spring is hinged to the fixed bracket, and the other end is hinged to the safety locking rod, and the safety locking rod is switched between a downward-flipping working state and an upward-flipping stopping state through the gas spring; the safety locking rod comprises a frame and a protective pad, and the protective pad is coated on the frame.

[0006] Preferably, a limit shock absorber is fixedly connected to the cab mounting plate, and the safety locking rod abuts against the limit shock absorber when in the flip-down working state.

[0007] Preferably, the skeleton includes a right support plate, a left support plate and a transverse plate, the right support plate and the left support plate are respectively connected to the two ends of the transverse plate, a left fixed plate is installed on the left support plate, a right fixed plate is fixedly connected to the right support plate, and the two sides of the safety locking rod are respectively hinged to the gas spring through the left fixed plate and the right fixed plate.

[0008] Preferably, the left fixed plate and the right fixed plate are both L-shaped bent plates; the rear portion of the left fixed plate is arranged close to the left support plate, and the front portion is placed on the left side of the left support plate and extends forward and backward; the gas spring is hinged to the front portion of the left fixed plate or the right fixed plate, and when in the downward working state, the limit shock absorber is supported by the rear side surface of the left fixed plate or the rear side surface of the right fixed plate.

[0009] Preferably, the right support plate includes a first connecting portion and a first side guard portion, and the first connecting portion and the first side guard portion are connected in an L-shape; the left support plate includes a second connecting portion and a second side guard portion, and the second connecting portion and the second side guard portion are connected in an L-shape, the left fixed plate is fixedly connected to the first connecting portion, and the right fixed plate is fixedly connected to the second connecting portion.

[0010] Preferably, the length of the first connecting portion is shorter than the length of the first side guard portion, and the length of the second connecting portion is shorter than the length of the second side guard portion.

[0011] Preferably, a first transition portion is connected between the first connecting portion and the first side guard portion, and a second arc-shaped transition portion is connected between the second connecting portion and the second side guard portion.

[0012] Preferably, in the downwardly folded working state, the two ends of the gas spring are respectively located at the upper side and the lower side, and the axis of the hinge shaft on the upper side of the gas spring is located in front of the axis of the hinge shaft on the lower side of the gas spring or in the same vertical plane.

[0013] Preferably, in the flip-up stop state, the two ends of the gas spring are respectively located at the front and rear sides, and the axis of the hinge shaft on the rear side of the gas spring is located below or in the same horizontal plane as the axis of the hinge shaft on the front side of the gas spring.

[0014] Preferably, a trigger plate is fixedly connected to the safety locking rod, and a micro switch for limiting the startup of the entire machine is installed on the fixed bracket or the cab mounting plate. When in the downward flipped working state, the trigger plate presses the micro switch.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. Before use, flip the safety locking rod upwards. When in use, the person enters the inner side of the safety locking rod and flips it downwards to the downward working state. The safety locking rod surrounds the person and provides safety protection;

[0017] 2. The pad provides flexible support for the human body. The pad is made of ergonomic polyurethane soft foam and is bonded to the frame. It has a large support area and is comfortable to place. You will not feel tired when operating the machine for a long time.

[0018] 3. A limited shock absorber is fixedly connected to the cab mounting plate, and the safety locking rod abuts against the limited shock absorber when it is in the downward flipping working state, which can provide buffering when the safety locking rod is flipped down to the downward flipping working state to avoid mechanical collision;

[0019] 4. A trigger plate is fixedly connected to the safety locking rod, and a micro switch for limiting the start-up of the whole machine is installed on the fixed bracket or the cab mounting plate. When in the downward working state, the trigger plate presses the micro switch, the induction trigger of the micro switch connects the circuit, and the whole machine can be started, providing a reliable safety protection mechanism for the driver. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the disassembled structure of the utility model;

[0022] Figure 3 yes Figure 2 A schematic diagram of the local enlarged structure at point A in the middle;

[0023] Figure 4 It is a schematic diagram of the hinged structure of the utility model;

[0024] Figure 5 It is a structural schematic diagram of the limit shock absorber of the utility model;

[0025] Figure 6 It is a partial structural schematic diagram of the safety locking rod of the utility model;

[0026] In the attached drawings, 1. cab mounting plate; 2. safety locking rod; 3. protective pad; 4. fixing bracket; 5. pin shaft; 6. cotter pin; 7. gas spring; 8. limit shock absorber; 9. frame; 10. right fixing plate; 11. left supporting plate; 111. first connecting part; 112. first arc-shaped transition part; 113. first side guard part; 12. transverse plate; 13. right supporting plate; 131. second connecting part; 132. second arc-shaped transition part; 133. second side guard part; 14. left fixing plate; 15. trigger plate; 16. micro switch; 17. screw; 18. rotating sleeve; 19. bolt; 20. gasket; 21. nut. DETAILED DESCRIPTION

[0027] The directional words mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only referenced to the directions of the drawings. Therefore, the directional words used are used to illustrate rather than limit the invention of the utility model.

[0028] like Figure 1-6As shown, a safety locking mechanism for a construction machinery seat comprises a cab mounting plate 1, a safety locking rod 2, a fixed bracket 4 and a gas spring 7, wherein the fixed bracket 4 is fixedly connected to the cab mounting plate 1, and the safety locking rod 2 is hinged to the fixed bracket 4; the safety locking rod 2 is U-shaped, and both sides are L-shaped; one end of the gas spring 7 is hinged to the fixed bracket 4, and the other end is hinged to the safety locking rod 2, and the safety locking rod 2 is switched between a downward-flipping working state and an upward-flipping stopping state through the gas spring 7; the safety locking rod 2 comprises a frame 9 and a protective pad 3, and the protective pad 3 is covered on the frame 9. Before use, the safety locking rod 2 is flipped up. When in use, a person enters the inner side of the safety locking rod 2 and flips it downward to the downward-flipping working state. The safety locking rod 2 surrounds the person to provide safety protection, and the protective pad 3 provides flexible support for the human body.

[0029] Specifically, the pad 3 is made of ergonomically shaped polyurethane soft foam, which is bonded to the frame 9 as a whole, has a large supporting area, is comfortable to place, and does not cause fatigue during long-term operation of the entire machine.

[0030] Furthermore, a limited shock absorber 8 is fixedly connected to the cab mounting plate 1. Specifically, a rubber shock absorber is used, and has a mushroom head slot, which is stuck on the cab mounting plate 1; the safety locking rod 2 abuts against the limited shock absorber 8 when it is in the downward working state, which can provide buffering and avoid mechanical collision when the safety locking rod 2 is flipped downward to the downward working state.

[0031] Furthermore, the skeleton 9 includes a right support plate 11, a left support plate 13 and a transverse plate 12, the right support plate 11 and the left support plate 13 are respectively connected to the two ends of the transverse plate 12, a left fixed plate 14 is installed on the left support plate 13, a right fixed plate 10 is fixedly connected to the right support plate 11, and the two sides of the safety locking rod 2 are respectively hinged to the gas spring 7 through the left fixed plate 14 and the right fixed plate 10.

[0032] Furthermore, the left fixed plate 14 and the right fixed plate 10 are both L-shaped bent plates, the rear portion of the left fixed plate 14 is arranged close to the left support plate 13, and the front portion is placed on the left side of the left support plate 13 and extends forward and backward; the gas spring 7 is hinged to the front portion of the left fixed plate 14 or the right fixed plate 10, and when in the downward working state, the limit shock absorber 8 is supported by the rear side surface of the left fixed plate 14 or the rear side surface of the right fixed plate 10.

[0033] Furthermore, the right support plate 11 includes a first connecting portion 111 and a first side guard portion 113, and the first connecting portion 111 and the first side guard portion 113 are connected in an L-shape; the left support plate 13 includes a second connecting portion 131 and a second side guard portion 133, and the second connecting portion 131 and the second side guard portion 133 are connected in an L-shape, the left fixed plate 14 is fixedly connected to the first connecting portion 111, and the right fixed plate 10 is fixedly connected to the second connecting portion 131; further, a first arc-shaped transition portion 112 is connected between the first connecting portion 111 and the first side guard portion 113, and a second arc-shaped transition portion 132 is connected between the second connecting portion 131 and the second side guard portion 133.

[0034] Furthermore, the length of the first connection portion 111 is smaller than the length of the first side protection portion 113 , and the length of the second connection portion 131 is smaller than the length of the second side protection portion 133 .

[0035] Specifically, the fixed bracket 4 includes a base, a left plate and a right plate. The upper sides of the left plate and the right plate are provided with mounting holes, through which bolts 19 are installed. The upper ends of the first connecting part 111 and the second connecting part 131 are provided with rotating sleeves 18. The bolts 19 pass through the mounting holes and are installed on the left plate and the right plate through nuts 21 and gaskets 20. The smooth rod of the bolt 19 passes through the rotating sleeve 18, and a lubricating oil channel is arranged on the inner side of the rotating sleeve 18. The lower sides of the left plate and the right plate are provided with pin shafts 5, and the gas spring 7 is hinged to the fixed bracket 4 through cotter pins 6 and cotter pins 6.

[0036] Furthermore, in the downward working state, the two ends of the gas spring 7 are respectively located on the upper side and the lower side, and the axis of the hinge shaft on the upper side of the gas spring 7 is located in front of the axis of the hinge shaft on the lower side of the gas spring 7. At this time, the supporting force of the gas spring 7 on the safety locking rod 2 and the product of the arm force from the force to the rotation axis (i.e., the bolt 19) (i.e., the torque) tend to prevent the safety locking rod 2 from moving upward. At the same time, the gravity of the safety locking rod 2 and the product of the arm force from the center of gravity of the force to the rotation axis (i.e., the bolt 19) tend to prevent the safety locking rod 2 from moving upward. Under the action of the combined force of the two torques, the safety locking rod 2 is firmly locked. Figure 1 Middle machine working position.

[0037] Furthermore, when the machine is in the flip-up shutdown state, the two ends of the gas spring 7 are respectively located at the front and rear sides, and the axis of the hinge shaft on the rear side of the gas spring 7 is located below the axis of the hinge shaft on the front side of the gas spring 7; the supporting force provided by the gas spring 7 acts on the safety locking rod 2, and the product of the magnitude of the supporting force and the force arm from the force to the rotation axis (i.e., the bolt 19) is greater than the product of the gravity of the safety locking rod 2 and the force arm from the center of gravity of the force to the rotation axis (i.e., the bolt 19), and the safety locking rod 2 does not fall. At the same time, the extension length of the gas spring 7 and the fixed position of the active end and the fixed position of the fixed end of the gas spring 7 can determine and maintain the final rotation angle of the safety locking rod 2 from the working position of the whole machine to the shutdown position of the whole machine. Under the action of the supporting force and rotation angle of the gas spring 7, the safety locking rod 2 is accurately locked in Figure 1 Middle machine stop position.

[0038] Furthermore, a trigger plate 15 is fixedly connected to the safety locking rod 2, and a micro switch 16 for limiting the startup of the whole machine is installed on the fixed bracket 4 or the cab mounting plate 1. When in the downward working state, the trigger plate 15 presses the micro switch 16; specifically, the micro switch 16 is installed on the fixed bracket 4 by means of a screw 17; the induction trigger of the micro switch 16 connects the circuit, and the whole machine can be started, providing a reliable safety protection mechanism for the driver.

Claims

1. A safety locking mechanism for a construction machinery seat, characterized in that: The invention comprises a cab mounting plate (1), a safety locking rod (2), a fixing bracket (4) and a gas spring (7); the fixing bracket (4) is fixedly connected to the cab mounting plate (1); the safety locking rod (2) is hinged to the fixing bracket (4); the safety locking rod (2) is U-shaped, and both sides are L-shaped; one end of the gas spring (7) is hinged to the fixing bracket (4), and the other end is hinged to the safety locking rod (2); the safety locking rod (2) is switched between a downward-flipping working state and an upward-flipping stopping state through the gas spring (7); the safety locking rod (2) comprises a frame (9) and a protective pad (3); the protective pad (3) is coated on the frame (9).

2. The engineering machinery seat safety locking mechanism according to claim 1, characterized in that: The cab mounting plate (1) is fixedly connected to a limit shock absorber (8), and the safety locking rod (2) abuts against the limit shock absorber (8) when in a downwardly tilted working state.

3. The safety locking mechanism for a construction machinery seat according to claim 2, characterized in that: The frame (9) comprises a right support plate (11), a left support plate (13) and a transverse plate (12); the right support plate (11) and the left support plate (13) are respectively connected to two ends of the transverse plate (12); a left fixed plate (14) is installed on the left support plate (13); a right fixed plate (10) is fixedly connected to the right support plate (11); and the two sides of the safety locking rod (2) are respectively hinged to the gas spring (7) through the left fixed plate (14) and the right fixed plate (10).

4. The engineering machinery seat safety locking mechanism according to claim 3, characterized in that: The left fixing plate (14) and the right fixing plate (10) are both L-shaped bent plates; the rear portion of the left fixing plate (14) is arranged close to the left supporting plate (13), and the front portion is arranged on the left side of the left supporting plate (13) and extends forward and backward; the gas spring (7) is hinged to the front portion of the left fixing plate (14) or the right fixing plate (10); when in the downwardly turned working state, the limit shock absorber (8) is supported by the rear side surface of the left fixing plate (14) or the rear side surface of the right fixing plate (10).

5. The engineering machinery seat safety locking mechanism according to claim 4, characterized in that: The right support plate (11) comprises a first connection portion (111) and a first side guard portion (113), and the first connection portion (111) and the first side guard portion (113) are connected in an L-shape; the left support plate (13) comprises a second connection portion (131) and a second side guard portion (133), and the second connection portion (131) and the second side guard portion (133) are connected in an L-shape; the left fixed plate (14) is fixedly connected to the first connection portion (111), and the right fixed plate (10) is fixedly connected to the second connection portion (131).

6. The safety locking mechanism for a construction machinery seat according to claim 5, characterized in that: The length of the first connecting portion (111) is smaller than the length of the first side guard portion (113), and the length of the second connecting portion (131) is smaller than the length of the second side guard portion (133).

7. The engineering machinery seat safety locking mechanism according to claim 5, characterized in that: A first transition portion (112) is connected between the first connecting portion (111) and the first side guard portion (113), and a second arc-shaped transition portion (132) is connected between the second connecting portion (131) and the second side guard portion (133).

8. The engineering machinery seat safety locking mechanism according to claim 1, characterized in that: In the downwardly turned working state, the two ends of the gas spring (7) are respectively located at the upper side and the lower side, and the axis of the hinge shaft on the upper side of the gas spring (7) is located in front of the axis of the hinge shaft on the lower side of the gas spring (7) or in the same vertical plane.

9. The engineering machinery seat safety locking mechanism according to claim 1 or 8, characterized in that: In the upwardly turned-up stop state, the two ends of the gas spring (7) are respectively located at the front side and the rear side, and the axis of the hinge shaft at the rear side of the gas spring (7) is located below or in the same horizontal plane as the axis of the hinge shaft at the front side of the gas spring (7).

10. The engineering machinery seat safety locking mechanism according to claim 1, characterized in that: A trigger plate (15) is fixedly connected to the safety locking rod (2), and a micro switch (16) for limiting the start of the entire machine is installed on the fixed bracket (4) or the cab mounting plate (1). When in the downward-flipped working state, the trigger plate (15) presses the micro switch (16).

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