Manually unlockable movable tow hitch

Abstract

The utility model relates to the technical field of traction seat, especially a hand -operated unlocking type movable traction seat, it includes the track with the clamping groove and the chassis of sliding installation between the track, be provided with the expansion piece on the chassis, the expansion piece telescopic direction is perpendicular with the track extension direction, the expansion piece both ends all are installed and are inserted in the track on the dog -claw of detachable insertion, the dog -claw sliding connection is in the chassis, be provided with the drive mechanism for the manual drive expansion piece on the chassis telescopic, and the drive mechanism includes the driving tooth and the driven tooth that rotate and install in the chassis and mutually engage, the driving tooth on fixed connection has connecting rod no.

Description

Technical Field

[0001] This utility model relates to the technical field of traction seats, and in particular to a manually unlockable movable traction seat. Background Technology

[0002] Currently, the movable towing seats equipped on tractor units are generally traditional types, and their unlocking method is basically pneumatic unlocking, meaning that it unlocks when air is supplied and locks when air is released. When the pneumatic unlocking malfunctions, manual observation is required to determine the fault, and a certain amount of time is spent on repairs. This will affect freight transport time and efficiency, and may even cause economic losses. Utility Model Content

[0003] In order to solve the problems existing in the prior art, the present invention provides a manually unlockable movable traction seat.

[0004] The present invention provides a manually unlockable movable traction seat with the following technical solution: A manually unlockable movable traction seat includes a track with a slot and a chassis slidably installed between the track. A telescopic component is provided on the chassis, and the telescopic direction of the telescopic component is perpendicular to the extension direction of the track. Both ends of the telescopic component are equipped with detachable claws that are inserted into the track. The claws are slidably connected to the chassis. A drive mechanism for manually driving the telescopic component to extend and retract is provided on the chassis. The drive mechanism includes an active gear and a driven gear that are rotatably installed on the chassis and mesh with each other. A connecting rod one and a connecting rod two are fixedly connected to the active gear, and a connecting rod one is fixedly connected to the driven gear. A movable beam connects the claws and the connecting rod one.

[0005] By adopting the above technical solution, the movable traction seat of this utility model embodiment adds a manual unlocking function. The entire unlocking and locking process is achieved by the movement of the second connecting rod, which can effectively solve the pneumatic system abnormality problem faced by the movable traction seat in the prior art, and avoid the situation of spending maintenance time and costs and affecting freight time and efficiency due to pneumatic system failure.

[0006] Optionally, the telescopic component includes a cylinder and a compression spring, with the compression spring elastically supported between the cylinder body and the end of the cylinder piston rod. One of the jaws is connected to the cylinder barrel, and the other jaw is connected to the end of the cylinder piston rod.

[0007] By adopting the above technical solution, the elastic rebound force of the compression spring causes the compression spring to stretch elastically, driving the claw to engage in the corresponding slot, thus completing the fixation.

[0008] Optionally, the movable beam is fixedly connected to the claw, and an insertion rod is fixedly connected to the end of the movable beam away from the claw. A waist-shaped hole is opened on the connecting rod, and the insertion rod is inserted into the waist-shaped hole.

[0009] By adopting the above technical solution, the rotational connection between the moving beam and the first connecting rod is realized, and they do not affect each other's movement trajectory.

[0010] Optionally, a pull rod is hinged to the end of the connecting rod away from the driving tooth, and a handle is fixed to the end of the pull rod away from the connecting rod.

[0011] By adopting the above technical solution, staff can operate the device by pulling on a handle, which improves the ease of use.

[0012] Optionally, the chassis is also provided with a limiting mechanism for restricting the movement of the pull rod. The limiting mechanism includes a mounting plate installed on the chassis, and a card holder with a slot is fixedly connected to the mounting plate. The pull rod can be detachably locked in the card holder.

[0013] By adopting the above technical solution, the card holder can fix the pull rod and maintain its stability when not in the adjustment process.

[0014] Optionally, a second mounting plate with a slot is also fixedly connected to the mounting plate. The second mounting plate is located on the side of the first mounting plate away from the second connecting rod, and a retaining ring is fitted and fixedly connected to the pull rod.

[0015] By adopting the above technical solution, the second card holder cooperates with the retaining ring to fix the pull rod during the adjustment of the traction seat position, which saves the staff more effort.

[0016] Optionally, a mounting base is fixed on the mounting plate, and a pressure plate for holding the pull rod is rotatably connected to the mounting base.

[0017] By adopting the above technical solution, the pressure plate has a pressing effect on the tie rod, which improves the stability of the tie rod when it is in the card holder.

[0018] Optionally, a mounting shaft is rotatably connected to the mounting base, and a safety hook for fixing the pressure plate is vertically rotatably connected to the mounting shaft. A torsion spring is also sleeved on the mounting shaft, and the torsion spring elastically supports the mounting base and the safety hook.

[0019] By adopting the above technical solution, the torsion spring elastically drives the safety hook to press against the pressure plate, thereby fixing the pressure plate and further improving the stability of the pull rod within the card holder.

[0020] Optionally, guide blocks are provided on the left and right sides of the chuck, and the guide blocks are fixed to the chassis.

[0021] By adopting the above technical solution, the chuck can maintain a stable movement trajectory under the guidance of the two guide blocks.

[0022] Optionally, it also includes a traction seat mounted on the chassis. The traction seat includes a traction seat body and two traction seat supports. One side of the traction seat support is bolted to the chassis, and the other side of the traction seat support is hooked to the outer edge of the track.

[0023] By adopting the above technical solution, the traction seat support is connected to the chassis, and the traction seat support is also hooked on the track, ensuring the stability of the chassis during movement. Attached Figure Description

[0024] Figure 1 This is a perspective view of a manually unlockable movable traction seat according to an embodiment of the present invention.

[0025] Figure 2 This is a structural diagram of the manually unlockable movable traction seat in the locked state according to an embodiment of this utility model.

[0026] Figure 3 This is a structural diagram of the unlocked state of the manually unlocked movable traction seat according to an embodiment of the present invention.

[0027] Figure 4 yes Figure 1 Enlarged diagram of point A in the middle.

[0028] Explanation of reference numerals in the attached drawings: 1. Track; 2. Chassis; 3. Traction seat support; 4. Telescopic component; 40. Cylinder; 41. Compression spring; 5. Claw; 50. Guide block; 6. Drive mechanism; 60. Driving gear; 61. Driven gear; 62. Moving beam; 620. Insert rod; 63. Connecting rod one; 630. Waist-shaped hole; 64. Connecting rod two; 65. Pull rod; 66. Handle; 7. Limiting mechanism; 70. Mounting plate; 71. Claw seat one; 72. Claw seat two; 73. Retaining ring; 74. Mounting seat; 75. Pressure plate; 76. Mounting shaft; 77. Safety hook; 78. Torsion spring. Detailed Implementation

[0029] The following combination Figures 1-4 The present invention will be described in further detail below.

[0030] This utility model discloses a manually unlockable movable traction seat. (Refer to...) Figures 1-4 The manually unlockable movable traction seat includes two rails 1 with serrated grooves. A chassis 2 is slidably installed between the two rails 1. A traction seat is installed on the top of the chassis 2. The traction seat includes a traction seat body (not shown in the figure) and two traction seat supports 3. One side of the traction seat support 3 is bolted to the chassis 2, and the other side of the traction seat support 3 is hooked to the outer edge of the rails 1 to ensure the stability of the chassis 2 during movement.

[0031] A telescopic component 4 is provided on the top surface of the chassis 2 along the direction perpendicular to the track 1. In this embodiment, the telescopic component 4 includes a cylinder 40 and a compression spring 41 sleeved on the piston rod of the cylinder 40. One end of the compression spring 41 is elastically supported on the cylinder body of the cylinder 40, and the other end of the compression spring 41 is elastically supported on the end of the piston rod of the cylinder 40. The compression spring 41 has the tendency to elastically drive the piston rod of the cylinder 40 to move out of the cylinder body. A detachable claw 5 is installed at the cylinder body end of the cylinder 40 and inserted into the serrated groove of the track 1. A detachable claw 5 is also installed at the end of the piston rod of the cylinder 40 and inserted into the serrated groove of the track 1. Two sets of guide blocks 50 for limiting the movement trajectory of the claw 5 are fixedly connected to the top surface of the chassis 2. The two guide blocks 50 in each set are located on the left and right sides of the claw 5.

[0032] The chassis 2 is provided with a drive mechanism 6 for manually driving the telescopic member 4 to extend and retract. The drive mechanism 6 includes an active tooth 60 and a driven tooth 61 rotatably mounted on the top surface of the chassis 2. The active tooth 60 and the driven tooth 61 mesh with each other. Two pawls 5 are respectively bolted with a movable beam 62 extending along the length of the telescopic member 4. The movable beam 62 is located above the telescopic member 4. The end of the movable beam 62 away from the pawls 5 is vertically fixed with a plug rod 620. The active tooth 60 and the driven tooth 61 are respectively fixed with a connecting rod 63. The end of the connecting rod 63 is provided with a waist-shaped hole 630. The plug rod 620 is inserted into the corresponding waist-shaped hole 630.

[0033] A second connecting rod 64 is also fixedly connected to the driving gear 60. The second connecting rod 64 and the first connecting rod 63 are on the same straight line. A pull rod 65 is hinged to the end of the second connecting rod 64 away from the driving gear 60. A handle 66 is fixedly connected to the end of the pull rod 65 away from the second connecting rod 64. By pulling the handle 66, the pull rod 65 and the second connecting rod 64 can be moved, thereby driving the driving gear 60 and the driven gear 61 to rotate and mesh. Then, the telescopic component 4 is retracted through the first connecting rod 63 and the moving beam 62, so that the pawl 5 is disengaged from the track 1. The position of the chassis 2 and the traction seat on it can then be adjusted.

[0034] The chassis 2 is also provided with a limiting mechanism 7 for restricting the movement of the tie rod 65. The limiting mechanism 7 includes a mounting plate 70 bolted to the top surface of the chassis 2. A first slotted seat 71 is fixedly connected to the top surface of the mounting plate 70 near the second connecting rod 64, and a second slotted seat 72 is fixedly connected to the top surface of the mounting plate 70 away from the second connecting rod 64. A retaining ring 73 is fitted and fixedly connected to the tie rod 65. A mounting base 74 is also fixedly connected to the top surface of the mounting plate 70. A horizontally rotatable pressure plate 75 is rotatably connected to the mounting base 74. The pressure plate 75 is located above the tie rod 65 and is used to hold the tie rod 65.

[0035] Mounting base 74 is also rotatably connected to mounting shaft 76. Mounting shaft 76 is fitted with a vertically rotatable safety hook 77. The safety hook 77 is located above pressure plate 75 and is used to hook and fix pressure plate 75. Mounting shaft 76 is also fitted with torsion spring 78. One leg of torsion spring 78 is connected to mounting base 74, and the other leg of torsion spring 78 is connected to safety hook 77. Torsion spring 78 has an elastic tendency to drive safety hook 77 downward and press pressure plate 75.

[0036] The operating principle of this manually unlockable movable towing seat in this embodiment is as follows: When the towing vehicle needs to adjust the distance between the tractor and the trailer, the towing seat is unlocked to adjust its position. The operator first rotates the safety hook 77 upwards, then rotates the pressure plate 75 outwards to disengage the pressure plate 75 from the pull rod 65. Subsequently, the operator pulls the handle 66 outwards to engage the pull rod 65 into the second mounting bracket 72, with the retaining ring 73 positioned on the outside of the second mounting bracket 72. During this process, the driving gear 60 and the driven gear 61 rotate relative to each other, causing the cylinder 40 and the compression spring 41 to contract. The two claws 5 disengage from the track 1, allowing the chassis 2 to be moved and its position adjusted.

[0037] When it is necessary to lock the position of the traction seat, the operator moves the pull rod 65 out of the second clamping seat 72. Due to the elastic rebound force of the compression spring 41, the compression spring 41 extends elastically, and the driving tooth 60 and the driven tooth 61 rotate in opposite directions. The two claws 5 are respectively engaged in the corresponding rails 1. Then the pull rod 65 is engaged in the first clamping seat 71, and the pressure plate 75 is moved in the opposite direction to press the pressure plate 75 against the pull rod 65. The safety hook 77 is pressed against the pressure plate 75 through the torsion spring 78, so that the pull rod 65 cannot move, thereby completing the fixation of the chassis 2 position.

[0038] The movable traction seat of this utility model embodiment adds a manual unlocking function. The entire unlocking and locking process is achieved by manually pulling out and manually returning the lever 65. This can effectively solve the pneumatic system abnormality problem faced by the movable traction seat in the prior art, and avoid the situation of spending maintenance time and costs and affecting freight time and efficiency due to pneumatic system failure.

[0039] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A manually unlockable movable traction seat, characterized in that: The system includes a track (1) with a slot and a chassis (2) that is slidably installed between the track (1). A telescopic component (4) is provided on the chassis (2). The telescopic component (4) extends in a direction perpendicular to the extension direction of the track (1). Both ends of the telescopic component (4) are equipped with detachable claws (5) that are inserted into the track (1). The claws (5) are slidably connected to the chassis (2). The chassis (2) is provided with a drive mechanism (6) for manually driving the telescopic component (4) to extend and retract. The drive mechanism (6) includes an active gear (60) and a driven gear (61) that are rotatably installed on the chassis (2) and mesh with each other. A connecting rod (63) and a connecting rod (64) are fixedly connected to the active gear (60). A connecting rod (63) is fixedly connected to the driven gear (61). A moving beam (62) is connected between the claw (5) and the connecting rod (63).

2. The manually unlockable movable traction seat according to claim 1, characterized in that: The telescopic component (4) includes a cylinder (40) and a compression spring (41). The compression spring (41) is elastically supported between the cylinder body of the cylinder (40) and the end of the piston rod of the cylinder (40). One of the claws (5) is connected to the cylinder barrel of the cylinder (40), and the other claw (5) is connected to the end of the piston rod of the cylinder (40).

3. The manually unlockable movable traction seat according to claim 1 or 2, characterized in that: The movable beam (62) is fixedly connected to the claw (5). The end of the movable beam (62) away from the claw (5) is fixedly connected to the insertion rod (620). A waist-shaped hole (630) is opened on the connecting rod (63), and the insertion rod (620) is inserted into the waist-shaped hole (630).

4. The manually unlockable movable traction seat according to claim 1, characterized in that: A pull rod (65) is hinged to the end of the connecting rod (64) away from the driving tooth (60), and a handle (66) is fixed to the end of the pull rod (65) away from the connecting rod (64).

5. The manually unlockable movable traction seat according to claim 4, characterized in that: The chassis (2) is also provided with a limiting mechanism (7) for restricting the movement of the pull rod (65). The limiting mechanism (7) includes a mounting plate (70) installed on the chassis (2). A card holder (71) with a card slot is fixed on the mounting plate (70). The pull rod (65) is detachably locked in the card holder (71).

6. The manually unlockable movable traction seat according to claim 5, characterized in that: The mounting plate (70) is also fixedly connected to a second card holder (72) with a card slot. The second card holder (72) is located on the side of the first card holder (71) away from the second connecting rod (64). A retaining ring (73) is fitted and fixedly connected to the pull rod (65).

7. The manually unlockable movable traction seat according to claim 5 or 6, characterized in that: A mounting base (74) is fixed on the mounting plate (70), and a pressure plate (75) for holding the pull rod (65) is rotatably connected to the mounting base (74).

8. The manually unlockable movable traction seat according to claim 7, characterized in that: A mounting shaft (76) is rotatably connected to the mounting base (74), and a safety hook (77) for fixing the pressure plate (75) is vertically rotatably connected to the mounting shaft (76). A torsion spring (78) is also sleeved on the mounting shaft (76), and the torsion spring (78) is elastically supported between the mounting base (74) and the safety hook (77).

9. The manually unlockable movable traction seat according to claim 1, characterized in that: Guide blocks (50) are provided on the left and right sides of the claw (5), and the guide blocks (50) are fixed on the chassis (2).

10. The manually unlockable movable traction seat according to claim 1, characterized in that: It also includes a traction seat installed on the chassis (2). The traction seat includes a traction seat body and two traction seat supports (3). One side of the traction seat support (3) is bolted to the chassis (2), and the other side of the traction seat support (3) is hooked to the outer edge of the track (1).

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