Wrecker suspension arm mechanism

Abstract

The utility model relates to the technical field of wrecker lazy arms, in particular to a wrecker lazy arm mechanism which comprises a wrecker body, a fixing seat arranged on a rear supporting plate of the wrecker body, a lifting assembly arranged above the fixing seat, a lazy arm arranged above the lifting assembly, and a limiting rod arranged at the right end of the lazy arm and used for hooking a lifted object. A trapezoid groove is formed in the upper surface of the fixing base, a motor is arranged at the left end of the fixing base, and the lifting assembly comprises a stand column and a height-adjustable lifting column inserted into the stand column; according to the wrecker suspension arm mechanism, the fixed seat and the rear supporting plate of the wrecker body are combined and installed, overall stable installation and matching are facilitated, the motor provides power for rotation of the screw rod, then horizontal movement of the stand column is achieved, the hydraulic cylinder is arranged, vertical movement of the lifting column in the stand column is facilitated, and a winch is matched with the suspension arm, so that stable winding and matching of a steel cable are facilitated; the transverse plate with the hook vertically moves up and down under the action of the limiting rod, and the hook is used for hooking an object so that the object can be stably hoisted and matched.

Description

Technical Field

[0001] The utility model relates to the technical field of a tow truck crane arm, in particular to a tow truck crane arm mechanism. Background Art

[0002] The full name of the wrecker is road wrecker, also known as a trailer, which consists of a chassis, a lifting device, a lifting and traction device, a hydraulic system, an electronic control system, a body and a tool box. It has multiple functions such as lifting, pulling and lifting and traction, and is suitable for clearing obstacles on highways and urban roads.

[0003] The utility model with the announcement number CN211684836U discloses a boom mechanism of a highway tow truck, comprising a connecting seat, a base is overlapped on one side of the top of the connecting seat, a telescopic column is plugged on the top of the base, a top pin of the telescopic column is connected to a first cantilever, and a front end pin of the first cantilever is connected to a second cantilever, a pressure wheel is provided at the top front end of the first cantilever, and a steering wheel is provided at the top end of the first cantilever, and a front end pin of the second cantilever is connected to a main support arm;

[0004] The above technical solution, due to the cantilever arm structure of the boom, is prone to rollover when towing a large obstacle. The reason is that the boom has only one fulcrum point. Therefore, the device is provided with a support arm at the front end of the boom. The support arm is divided into two structures, a main structure and a secondary structure. When working, it can be vertical or nearly vertical to the ground to form a gantry structure with the tow truck and the boom, so that both ends of the boom have support points; however, when the tow truck is lifting heavy objects, it is not convenient to freely lift and coordinate according to different positions and heights, and the lifted object is not convenient to adjust the position in the horizontal direction. Utility Model Content

[0005] The purpose of the utility model is to provide a tow truck boom mechanism to solve the problem that the tow truck boom mechanism for a highway tow truck with the authorization announcement number CN211684836U proposed in the above background technology is not convenient for the tow truck to freely lift and coordinate according to different positions and heights when lifting heavy objects, and the lifted objects are not convenient for adjusting and coordinating the position in the horizontal direction.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A tow truck boom mechanism comprises a tow truck body, a fixing seat is provided on a rear support plate of the tow truck body, a lifting assembly is provided above the fixing seat, a boom is provided above the lifting assembly, a limiting rod for hanging a lifting object is provided at the right end of the boom, a ladder-shaped groove is provided on the upper surface of the fixing seat, a motor is provided at the left end of the fixing seat, the lifting assembly comprises a lifting column with adjustable height connected with columns, a hydraulic cylinder is provided at the bottom of the column, a rotating shaft is provided at the lower surface of the boom near the left end, a rotating groove is provided at the top of the lifting column corresponding to the rotating shaft, a winch is provided at the left end of the boom, a cross plate is provided at the bottom of the limiting rod, hooks are provided at the lower surface of the cross plate near both ends, and a limiting groove is provided at the upper surface of the boom near the right end corresponding to the limiting rod.

[0008] Preferably, the bottom of the fixing seat is tightly fitted with the rear support plate of the tow truck body and fixedly connected by screws. The motor is fixedly connected to the fixing seat by screws. The output shaft of the motor is coaxially connected with a screw rod, which extends into the trapezoidal groove and is rotatably connected to the fixing seat.

[0009] In the utility model, a motor is provided and a power source is turned on, and the rotation of the output shaft drives the screw rod to continuously rotate, which helps to continuously adjust the horizontal movement coordination of the lifting component.

[0010] Preferably, a ladder-shaped block is provided at the bottom of the column corresponding to the ladder-shaped groove, and a second screw hole is opened on the ladder-shaped block at a position corresponding to the screw rod.

[0011] In the utility model, the ladder block is provided to slide with the ladder groove, which helps the column to slide stably in the horizontal direction. The screw is threadedly connected with the second screw hole. The rotation of the screw drives the ladder block to move, thereby realizing the horizontal movement of the column.

[0012] Preferably, a slot is provided at the top of the column, the width of the inner wall of the slot is matched with the width of the outer wall of the lifting column, the bottom of the hydraulic cylinder is fixedly connected to the bottom of the column by screws, the telescopic arm of the hydraulic cylinder extends into the slot, and the top of the telescopic arm is fixedly connected to the bottom of the lifting column by screws.

[0013] In the utility model, a lifting column is arranged to be plugged and matched with a card slot, and when a hydraulic cylinder is powered on, a telescopic arm is extended or shortened to realize that the lifting column moves up and down in the card slot.

[0014] Preferably, the top of the rotating shaft is welded and fixed to the boom, and a first screw hole communicating with the rotating groove is provided on the outer wall of the lifting column near the top, and a fastening bolt is provided in the first screw hole.

[0015] In the utility model, a rotating shaft and a rotating groove are provided for rotational connection, so as to realize the rotational cooperation between the lifting column and the boom, the fastening bolt is threadedly connected with the first screw hole, and the end of the fastening bolt extends into the rotating groove, the end of the fastening bolt fits tightly with the rotating shaft, and the position of the rotating shaft is fixed under the action of friction force, thereby realizing the horizontal rotation cooperation of the boom.

[0016] Preferably, the winch is fixedly connected to the boom by screws, a wire groove is provided in the middle of the boom, a roller is provided at the right end of the wire groove, the steel cable on the winch passes through the wire groove and passes over the rotating shaft, and the roller is rotatably connected to the boom.

[0017] In the utility model, a winch is set and the power is turned on. The winding roller rotates to drive the steel cable to be wound, which helps to adjust the limit rod up and down. The rotating roller cooperates, which helps the steel cable and the rotating roller to rotate flexibly, so as to guide the steel cable to move up and down.

[0018] Preferably, the boom is L-shaped, with reinforcing rods provided on both sides, and both ends of the reinforcing rods are respectively welded and fixed to the boom.

[0019] In the utility model, a reinforcing rod is arranged to increase the structural stability of the boom, which helps the boom to stably support and lift.

[0020] Preferably, the bottom of the limit rod is welded and fixed to the horizontal plate, the top of the hook is welded and fixed to the horizontal plate, a fixing ring is provided on the upper surface of the horizontal plate near the middle of the left side, and the fixing ring is wound and fixed to the end of the steel cable on the winch.

[0021] In the utility model, the limit rod is inserted into the limit groove to help limit the stable up and down movement of the limit rod. The cooperation of the fixed ring helps the connection of the steel cable. Through the contraction of the steel cable, the limit rod can move in the vertical direction. The setting of the two hooks helps to lift and hang objects.

[0022] Compared with the prior art, the beneficial effects of the utility model are:

[0023] 1. The utility model is installed in combination with the rear support plate of the tow truck body by setting a fixed seat, which is conducive to the overall stable installation. The motor provides power for the rotation of the screw, thereby realizing the horizontal movement of the column. The hydraulic cylinder is set to help the lifting column move up and down in the column. The winch on the boom helps to stably reel in the steel cable, and the horizontal plate with the hook can move vertically up and down under the action of the limit rod. The hook hanging the object helps to stably lift the object.

[0024] 2. The utility model increases the support stability of the boom by arranging a reinforcing rod, and the boom is rotatably connected to the lifting column through a rotating shaft, and with the cooperation of fastening bolts, the rotating position of the boom on the lifting column is fixed to achieve horizontal rotation cooperation, and the bottom of the limit rod cooperates with the fixing block, which helps to limit the position of the limit rod and prevent the limit rod from detaching from the boom, affecting long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2 It is a schematic diagram of the overall use state structure of the utility model;

[0027] Figure 3 This is a schematic diagram of the combined structure of the fixing seat and the lifting assembly of the utility model;

[0028] Figure 4 This is a schematic diagram of the combined structure of the lifting assembly and the boom of the utility model;

[0029] Figure 5 This is a schematic diagram of the combined structure of the boom and lifting column of the utility model;

[0030] Figure 6 It is a schematic diagram of the cross-sectional structure of the boom portion of the utility model;

[0031] Figure 7 It is a schematic diagram of the combined structure of the limit rod and the horizontal plate of the utility model.

[0032] The meaning of each number in the figure is:

[0033] The main body of the tow truck;

[0034] Fixed seat; 20, ladder groove; 21, motor; 210, screw;

[0035] Lifting assembly; 30, column; 300, hydraulic cylinder; 301, slot; 31, lifting column; 310, rotating slot; 311, first screw hole; 312, fastening bolt; 32, ladder block; 320, second screw hole;

[0036] Boom; 40, rotating shaft; 41, hoist; 42, reinforcing rod; 43, wire groove; 430, rotating roller; 44, limit groove;

[0037] Limit rod; 50, horizontal plate; 51, hook; 52, fixing ring; 53, fixing block. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] See also Figure 1-Figure 7 , this embodiment provides a technical solution:

[0040] A tow truck boom mechanism comprises a tow truck body 1, a fixing seat 2 is arranged on a rear support plate of the tow truck body 1, a motor 21 is arranged on the left end of the fixing seat 2, a lifting assembly 3 is arranged above the fixing seat 2, the bottom of the fixing seat 2 is tightly fitted with the rear support plate of the tow truck body 1 and fixedly connected by screws, the motor 21 is fixedly connected to the fixing seat 2 by screws, the output shaft of the motor 21 is coaxially connected with a screw rod 210, the screw rod 210 extends into a trapezoidal groove 20, and the screw rod 210 is rotatably connected to the fixing seat 2.

[0041] In the present invention, the motor 21 is provided and the power is turned on, and the output shaft rotates to drive the screw 210 to rotate continuously, which helps to continuously adjust the horizontal movement coordination of the lifting assembly 3.

[0042] Furthermore, the lifting assembly 3 includes a lifting column 31 with adjustable height that is plugged into the column 30, a hydraulic cylinder 300 is provided at the bottom of the column 30, a ladder block 32 is provided at the bottom of the column 30 corresponding to the ladder groove 20, and a second screw hole 320 is opened on the ladder block 32 corresponding to the screw rod 210.

[0043] In the present invention, a ladder block 32 is provided to slide with the ladder groove 20, which helps the column 30 to slide stably in the horizontal direction. The screw 210 is threadedly connected with the second screw hole 320. The rotation of the screw 210 drives the ladder block 32 to move, thereby realizing the horizontal movement of the column 30.

[0044] Specifically, a slot 301 is provided at the top of the column 30, the width of the inner wall of the slot 301 is adapted to the width of the outer wall of the lifting column 31, the bottom of the hydraulic cylinder 300 is fixedly connected to the bottom of the column 30 by screws, the telescopic arm of the hydraulic cylinder 300 extends into the slot 301, and the top of the telescopic arm is fixedly connected to the bottom of the lifting column 31 by screws.

[0045] In the utility model, the lifting column 31 is arranged to be plugged and matched with the slot 301 , and the hydraulic cylinder 300 is powered on, and the telescopic arm is extended or shortened to realize the lifting column 31 to move up and down in the slot 301 .

[0046] It should be noted that a boom 4 is provided above the lifting assembly 3, a limit rod 5 for hanging a lifting object is provided at the right end of the boom 4, a ladder-shaped groove 20 is provided on the upper surface of the fixing seat 2, a rotating shaft 40 is provided near the left end of the lower surface of the boom 4, a rotating groove 310 is provided at the top of the lifting column 31 corresponding to the rotating shaft 40, and a winch 41 is provided at the left end of the boom 4;

[0047] Secondly, the top of the rotating shaft 40 is welded and fixed to the boom 4 , and a first screw hole 311 communicating with the rotating groove 310 is opened on the outer wall of the lifting column 31 near the top, and a fastening bolt 312 is provided in the first screw hole 311 .

[0048] In the present invention, a rotating shaft 40 is provided to be rotatably connected with the rotating groove 310 to realize the rotational cooperation between the lifting column 31 and the boom 4, the fastening bolt 312 is threadedly connected with the first screw hole 311, and the end of the fastening bolt 312 extends into the rotating groove 310, the end of the fastening bolt 312 is tightly fitted with the rotating shaft 40, and the position of the rotating shaft 40 is fixed under the action of friction force, thereby realizing the horizontal rotation cooperation of the boom 4.

[0049] Furthermore, the winch 41 is fixedly connected to the boom 4 by screws, a wire groove 43 is opened in the middle of the boom 4, a roller 430 is provided at the right end of the wire groove 43, the steel cable on the winch 41 passes through the wire groove 43 and passes over the rotating shaft 40, and the roller 430 is rotatably connected to the boom 4.

[0050] In the utility model, a winch 41 is set and powered on, and the winding roller rotates to drive the steel cable to be wound, which helps to adjust the limit rod 5 up and down. The cooperation of the rotating roller 430 helps the steel cable and the rotating roller 430 to rotate flexibly, which is convenient for guiding the steel cable to move up and down.

[0051] Specifically, the suspension arm 4 is L-shaped, and reinforcement rods 42 are provided on both sides. Both ends of the reinforcement rods 42 are respectively welded and fixed to the suspension arm 4.

[0052] In the present invention, the reinforcing rod 42 is provided to increase the structural stability of the boom 4, which helps the boom 4 to stably support and lift.

[0053] It is worth adding that a horizontal plate 50 is provided at the bottom of the limiting rod 5 , and hooks 51 are provided on the lower surface of the horizontal plate 50 near both ends, and a limiting groove 44 is provided on the upper surface of the boom 4 near the right end corresponding to the limiting rod 5 .

[0054] Furthermore, the bottom of the limit rod 5 is welded and fixed to the cross plate 50, the top of the hook 51 is welded and fixed to the cross plate 50, and a fixing ring 52 is provided on the upper surface of the cross plate 50 near the middle of the left side, and the fixing ring 52 is wrapped and fixed to the end of the steel cable on the winch 41.

[0055] In the utility model, the limit rod 5 is provided to be plugged into the limit groove 44, which helps to limit the stable up and down movement of the limit rod 5. The cooperation of the fixing ring 52 helps to connect the steel cable. Through the contraction of the steel cable, the limit rod 5 can move in the vertical direction. The provision of two hooks 51 helps to lift and hang objects.

[0056] When the tow truck boom mechanism of this embodiment is used, the user first assembles and installs the fixing seat 2 with the motor 21 and the rear support plate on the tow truck body 1, and then plugs and matches the column 30 with the lifting column 31 with the ladder-shaped block 32 and the ladder-shaped groove 20, and the screw 210 is threadedly connected with the second screw hole 320, and then the boom 4 with the reinforcing rod 42 is rotatably connected with the rotating groove 310 on the lifting column 31 through the rotating shaft 40, and the winch 41 with the steel cable is fixed on the boom 4, the steel cable passes through the wire groove 43 and passes from the rotating roller 430 to the fixing ring 52 on the cross plate 50, and the limiting rod 5 passes through the limiting groove 44, and the position of the limiting rod 5 is limited under the cooperation of the fixing block 53;

[0057] When it is necessary to lift an object, the tow truck body 1 moves to the corresponding position. According to the height of the object to be lifted, the telescopic arm of the hydraulic cylinder 300 is manually controlled to extend to realize the rise of the lifting column 31, and with the cooperation of the motor 21, the position of the column 30 on the fixed seat 2 is adjusted. With the cooperation of the winch 41, the steel cable is wound to realize the up and down movement of the limit rod 5, and with the cooperation of the hook 51, the object is hung and lifted. When it is necessary to adjust the position of the boom 4 by horizontal rotation, the fastening bolt 312 is manually screwed, and the rotating shaft 40 rotates in the rotating groove 310. When it reaches the corresponding position, the fastening bolt 312 is tightened to fix the position of the rotating shaft 40, thereby realizing the fixing of the rotation angle of the boom 4. The overall combination is convenient to install and easy to operate quickly.

Claims

1. A tow truck crane mechanism, comprising a tow truck body (1), a fixing seat (2) being provided on a rear support plate of the tow truck body (1), a lifting assembly (3) being provided above the fixing seat (2), a lifting arm (4) being provided above the lifting assembly (3), a limiting rod (5) being provided at the right end of the lifting arm (4) for hanging a lifting object, characterized in that: The upper surface of the fixing seat (2) is provided with a ladder-shaped groove (20), the left end of the fixing seat (2) is provided with a motor (21), the lifting assembly (3) comprises a column (30) and a lifting column (31) with adjustable height plugged into the column (30), the bottom of the column (30) is provided with a hydraulic cylinder (300), the lower surface of the boom (4) is provided with a rotating shaft (40) near the left end, the top of the lifting column (31) is provided with a rotating groove (310) at a position corresponding to the rotating shaft (40), the left end of the boom (4) is provided with a winch (41), the bottom of the limit rod (5) is provided with a horizontal plate (50), the lower surface of the horizontal plate (50) is provided with hooks (51) near both ends, and the upper surface of the boom (4) is provided with a limit groove (44) at a position corresponding to the limit rod (5) near the right end.

2. The tow truck boom mechanism according to claim 1, characterized in that: The bottom of the fixing seat (2) is tightly fitted to the rear support plate of the tow truck body (1) and is fixedly connected via screws. The motor (21) is fixedly connected to the fixing seat (2) via screws. The output shaft of the motor (21) is coaxially connected to a screw rod (210). The screw rod (210) extends into the ladder-shaped groove (20). The screw rod (210) is rotatably connected to the fixing seat (2).

3. The tow truck boom mechanism according to claim 2, characterized in that: A ladder-shaped block (32) is provided at the bottom of the column (30) at a position corresponding to the ladder-shaped groove (20), and a second screw hole (320) is provided on the ladder-shaped block (32) at a position corresponding to the screw rod (210).

4. The tow truck boom mechanism according to claim 1, characterized in that: A slot (301) is provided at the top of the column (30), the width of the inner wall of the slot (301) matches the width of the outer wall of the lifting column (31), the bottom of the hydraulic cylinder (300) is fixedly connected to the bottom of the column (30) by screws, the telescopic arm of the hydraulic cylinder (300) extends into the slot (301), and the top of the telescopic arm is fixedly connected to the bottom of the lifting column (31) by screws.

5. The tow truck boom mechanism according to claim 1, characterized in that: The top of the rotating shaft (40) is welded and fixed to the suspension arm (4), and a first screw hole (311) communicating with the rotating groove (310) is provided on the outer wall of the lifting column (31) near the top, and a fastening bolt (312) is provided in the first screw hole (311).

6. The tow truck boom mechanism according to claim 1, characterized in that: The hoist (41) is fixedly connected to the boom (4) by means of screws; a wire groove (43) is provided in the middle of the boom (4); a roller (430) is provided at the right end of the wire groove (43); a steel cable on the hoist (41) passes through the wire groove (43) and passes over the rotating shaft (40); and the roller (430) is rotatably connected to the boom (4).

7. The tow truck boom mechanism according to claim 1, characterized in that: The suspension arm (4) is L-shaped, and reinforcement rods (42) are provided on both sides. Both ends of the reinforcement rods (42) are respectively welded and fixed to the suspension arm (4).

8. The tow truck boom mechanism according to claim 1, characterized in that: The bottom of the limit rod (5) is welded and fixed to the transverse plate (50), the top of the hook (51) is welded and fixed to the transverse plate (50), and a fixing ring (52) is provided on the upper surface of the transverse plate (50) near the middle of the left side, and the fixing ring (52) is wound and fixed to the end of the steel cable on the winch (41).

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