Adjustable steering mechanism of self-propelled crane

Abstract

The invention belongs to the technical field of crane steering mechanisms, and relates to an adjustable steering mechanism of a self-propelled crane, which comprises a chassis, a connecting frame is arranged at the top of the chassis, the top of the connecting frame is fixedly connected with one end of a universal joint I, and the other end of the universal joint I is fixedly connected with one end of a telescopic rod; the other end of the telescopic rod is fixedly connected with one end of a second universal joint, the other end of the second universal joint is fixedly connected with the bottom of a connecting rod, the top of the connecting rod is fixedly connected with a first electric push rod, and the top of the first electric push rod is connected with a steering wheel through a mounting assembly. A supporting frame is connected to the base plate in a sliding mode, the supporting frame is vertically arranged, the connecting rod is rotationally connected to the outer side of the supporting frame, an adjusting assembly is arranged in the base plate, and the supporting frame is connected with the adjusting assembly.

Description

Technical Field

[0001] The invention belongs to the technical field of crane steering mechanisms and relates to an adjustable steering mechanism of a self-propelled crane. Background Art

[0002] At present, the cabs of self-propelled cranes are all offset, which makes it difficult to arrange the steering system according to the normal single universal joint structure.

[0003] The patent with announcement number CN201872785U discloses an adjustable steering mechanism of a self-propelled crane, which mainly includes a steering wheel, a universal transmission device, an adjustment mechanism and other organizations, and is characterized in that: the steering wheel is fixed on the spline above the universal transmission device; the upper end of the steering device fixing frame is connected to the upper end of the cab through an upper connecting plate, and the lower end is connected to the bottom plate of the cab through a lower fixed bracket, the lower end of the universal transmission device is connected to the steering machine through a universal joint, and the middle is connected to the upper part through another universal joint; the adjustment mechanism is connected to the universal transmission device, and the height and front and rear position of the steering wheel can be adjusted by turning the adjustment handle upward, and the universal transmission device can be locked on the steering device fixing frame by turning the adjustment handle downward; a dust cover is provided at the connection between the universal transmission device and the steering machine, and the dust cover is fixed on the floor of the cab and covered on the steering machine through the universal transmission device. The present invention has the convenient characteristics of adjusting the front and rear and high and low positions of the steering wheel.

[0004] Although the above technical solution realizes the adjustment of the front and rear and height position of the steering wheel, it cannot change the left and right position of the steering wheel. The special offset design of the self-propelled crane makes the traditional steering mechanism inconvenient to use. At the same time, the existing self-propelled crane can be driven by remote control, and can be remotely controlled when manual control is combined, which reduces the use of the cab. The traditional steering device will make it impossible to reduce the space of the cab, affecting the development of remote cranes. Therefore, it is necessary to propose an adjustable steering mechanism for a self-propelled crane to solve the above problems. Summary of the invention

[0005] In order to solve the above problems, the present invention provides an adjustable steering mechanism for a self-propelled crane.

[0006] The technical solution of the present invention is as follows:

[0007] An adjustable steering mechanism for a self-propelled crane comprises a chassis, a connecting frame is provided on the top of the chassis, the top of the connecting frame is fixedly connected to one end of a universal joint 1, the other end of the universal joint 1 is fixedly connected to one end of a telescopic rod, the other end of the telescopic rod is fixedly connected to one end of a universal joint 2, the other end of the universal joint 2 is fixedly connected to the bottom of the connecting rod, an electric push rod 1 is fixedly connected to the top of the connecting rod, and the top of the electric push rod 1 is connected to a steering wheel via a mounting assembly; a support frame is slidably connected to the chassis, the support frame is vertically arranged, the connecting rod is rotatably connected to the outside of the support frame, an adjusting assembly is provided inside the chassis, and the support frame is connected to the adjusting assembly.

[0008] The adjustment assembly comprises a driving structure and a threaded rod. The threaded rod is rotatably connected to the chassis, and the bottom of the support frame is threadedly connected to the outer periphery of the threaded rod.

[0009] The driving structure comprises a motor, the motor is fixedly connected inside the chassis, and the threaded rod is fixedly connected to the output end of the motor.

[0010] A slide groove is provided on the upper part of the chassis, and the support frame is slidably connected to the middle part of the slide groove.

[0011] The mounting assembly includes two pressure blocks, which are slidably connected to the inside of the electric push rod. An insertion rod is fixedly connected to the top of the pressure block. A mounting groove is provided at the bottom of the steering wheel. A slot is provided outside the mounting groove. The insertion rod and the slot are snap-fitted together. The inner sides of the two pressure blocks are connected as a whole through an elastic structure.

[0012] The elastic structure comprises a spring, and two ends of the spring are respectively fixedly connected to two pressing blocks.

[0013] The top of the support frame is rotatably connected to one end of the second electric push rod, and the other end of the second electric push rod is rotatably connected to the outside of the connecting rod.

[0014] The electric push rod 1 and the outer edge of the mounting groove are both provided with bevel angles.

[0015] Beneficial effects of the present invention:

[0016] 1. In the present invention, through the mutual cooperation of the telescopic rod, the universal joint 2, the universal joint 1 and other structures, when the support frame moves, the connecting rod can be driven to move. At this time, the telescopic rod can be extended and retracted without changing the height of the electric push rod 1, so that the electric push rod 1 and the steering wheel can be adjusted left and right for better use, thereby realizing more functions of the steering mechanism.

[0017] 2. In the present invention, the steering wheel and the electric push rod can be easily separated by the cooperation of the pressure block, the plug rod, the spring, the slot and other structures, so that the steering wheel can be replaced according to preference to meet the different usage needs of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of an adjustable steering mechanism of a self-propelled crane of the present invention;

[0019] Figure 2 It is a structural schematic diagram of a threaded rod of an adjustable steering mechanism of a self-propelled crane of the present invention;

[0020] Figure 3 The present invention is a schematic structural diagram of an installation structure of an adjustable steering mechanism of a self-propelled crane.

[0021] In the figure: 1. chassis; 2. connecting frame; 3. universal joint 1; 4. telescopic rod; 5. universal joint 2; 6. connecting rod; 7. electric push rod 1; 8. steering wheel; 9. mounting groove; 10. pressure block; 11. plug rod; 12. spring; 13. slot; 14. electric push rod 2; 15. motor; 16. threaded rod; 17. support frame; 18. slide groove. DETAILED DESCRIPTION

[0022] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and technical solutions.

[0023] Reference Figure 1-Figure 2 An embodiment of the present invention provides: an adjustable steering mechanism of a self-propelled crane, comprising a chassis 1, a connecting frame 2 is arranged on the top of the chassis 1, the top of the connecting frame 2 is fixedly connected to one end of a universal joint 3, the other end of the universal joint 3 is fixedly connected to one end of a telescopic rod 4, the other end of the telescopic rod 4 is fixedly connected to one end of a universal joint 5, the other end of the universal joint 5 is fixedly connected to the bottom of a connecting rod 6, the top of the connecting rod 6 is fixedly connected to an electric push rod 7, the top of the electric push rod 7 is connected to a steering wheel 8 through a mounting assembly, the electric push rod 7 can be telescopic, thereby adjusting the up and down position of the steering wheel 8.

[0024] Reference Figure 2The chassis 1 is slidably connected with a support frame 17, which is arranged vertically. The connecting rod 6 is rotatably connected to the outside of the support frame 17. The connecting rod 6 can be driven to move by moving the support frame 17 left and right. At this time, the interface of the telescopic rod 4 is telescoped, so as to adjust according to the position of the universal joint 1 3 and the universal joint 2 5, so as to meet different usage needs. When installed on a remote-controlled crane, when remote control is required, the interface retracts the steering wheel 8 to the side through this structure, thereby saving space in the cockpit. The top of the support frame 17 is rotatably connected with an electric push rod 2 14, and the other end of the electric push rod 2 14 is rotatably connected to the outside of the connecting rod 6. The electric push rod 2 14 can drive the connecting rod 6 to rotate forward and backward through the operation of the electric push rod 2 14, so as to adjust the front and rear position of the steering wheel 8, so as to meet different usage needs. The outer periphery of the connecting rod 6 is rotatably connected with two rings, and the electric push rod 2 14 is specifically connected to one of the rings, so as to ensure that the connecting rod 6 can rotate normally and can also be adjusted forward and backward.

[0025] Reference Figure 2 , an adjustment component is arranged inside the chassis 1, and a support frame 17 is connected to the adjustment component. The adjustment component includes a driving structure and a threaded rod 16, the threaded rod 16 is rotatably connected to the middle part of the chassis 1, and the support frame 17 is threadedly connected to the outer periphery of the threaded rod 16. The support frame 17 can be driven to move left and right by rotating the threaded rod 16, so as to achieve left and right adjustment of the position of the steering wheel 8. The driving structure includes a motor 15, the motor 15 is fixedly connected to the inside of the chassis 1, and the threaded rod 16 is fixedly connected to the output end of the motor 15. The position of the support frame 17 can be adjusted by driving the threaded rod 16 to rotate by the motor 15. A slide groove 18 is provided on the upper part of the chassis 1, and the support frame 17 is slidably connected to the middle part of the slide groove 18. The position of the support frame 17 is limited by the slide groove 18, so that the movement of the support frame 17 is more stable.

[0026] Reference Figure 3 The installation assembly includes two pressing blocks 10, which are slidably connected inside the electric push rod 7. A plug rod 11 is fixedly connected to the top of the pressing block 10. A mounting groove 9 is provided at the bottom of the steering wheel 8. A slot 13 is provided outside the mounting groove 9. The plug rod 11 and the slot 13 are engaged with each other. After the plug rod 11 and the slot 13 are engaged, the connection between the electric push rod 7 and the steering wheel 8 can be realized. The inner sides of the two pressing blocks 10 are connected as a whole through an elastic structure. The electric push rod 7 and the outer edges of the mounting groove 9 are both provided with bevels for better connecting the electric push rod 7 and the steering wheel 8. The elastic structure includes a spring 12, and the two ends of the spring 12 are fixedly connected to the two pressing blocks 10 respectively. The plug rod 11 is ejected outward by the spring 12, so that the plug rod 11 is engaged with the slot 13.

[0027] Working principle: During use, when the left and right position of the steering wheel 8 needs to be adjusted, the driving motor 15 can be used to drive the threaded rod 16 to work, so that the support frame 17 swings left and right, driving the connecting rod 6 to move. At this time, the telescopic rod 4 will be extended and retracted as the position of the universal joint 2 5 changes to ensure the normal transmission of power, thereby realizing the left and right adjustment of the steering structure. At the same time, the electric push rod 2 14 and the electric push rod 1 7 can be used to adjust the front and back and up and down of the steering mechanism respectively, thereby enriching the adjustment function of the steering mechanism.

[0028] Secondly, when the steering wheel 8 needs to be replaced, it is only necessary to press the pressure block 10 toward the inner side of the electric push rod 7 to make the spring 12 shrink and deform. At this time, the insertion rod 11 can be disengaged from the middle of the slot 13, and the steering wheel 8 can be removed. Then, the steering wheel 8 of the new shape is inserted from the top of the electric push rod 7 so that the electric push rod 7 and the installation groove 9 are aligned. After the insertion rod 11 and the slot 13 are aligned, the steering wheel 8 can be installed by pressing downwards. The operation is simple, and the user can change the shape of the steering wheel 8 according to needs, making it more convenient to use.

Claims

1. An adjustable steering mechanism for a self-propelled crane, comprising a chassis (1), characterized in that: A connecting frame (2) is provided at the top of the chassis (1), the top of the connecting frame (2) is fixedly connected to one end of a universal joint (3), the other end of the universal joint (3) is fixedly connected to one end of a telescopic rod (4), the other end of the telescopic rod (4) is fixedly connected to one end of a universal joint (5), the other end of the universal joint (5) is fixedly connected to the bottom of a connecting rod (6), the top of the connecting rod (6) is fixedly connected to an electric push rod (7), and the top of the electric push rod (7) is connected to a steering wheel (8) via a mounting assembly; a support frame (17) is slidably connected to the chassis (1), the support frame (17) is arranged vertically, the connecting rod (6) is rotatably connected to the outside of the support frame (17), an adjustment assembly is provided inside the chassis (1), and the support frame (17) is connected to the adjustment assembly.

2. The adjustable steering mechanism of a self-propelled crane according to claim 1, characterized in that: The adjustment assembly comprises a driving structure and a threaded rod (16); the threaded rod (16) is rotatably connected to the chassis (1); and the bottom of the support frame (17) is threadedly connected to the outer periphery of the threaded rod (16).

3. The adjustable steering mechanism of a self-propelled crane according to claim 2, characterized in that: The driving structure comprises a motor (15), the motor (15) is fixedly connected inside the chassis (1), and the threaded rod (16) is fixedly connected to the output end of the motor (15).

4. The adjustable steering mechanism of a self-propelled crane according to claim 1, characterized in that: A slide groove (18) is provided on the upper part of the chassis (1), and the support frame (17) is slidably connected to the middle part of the slide groove (18).

5. The adjustable steering mechanism of a self-propelled crane according to claim 1, characterized in that: The mounting assembly comprises two pressing blocks (10), the pressing blocks (10) being slidably connected inside the electric push rod (7), the top of the pressing block (10) being fixedly connected with an insertion rod (11), the bottom of the steering wheel (8) being provided with a mounting groove (9), the outer side of the mounting groove (9) being provided with a slot (13), the insertion rod (11) and the slot (13) being snap-fitted, and the inner sides of the two pressing blocks (10) being connected as a whole via an elastic structure.

6. The adjustable steering mechanism of a self-propelled crane according to claim 5, characterized in that: The elastic structure comprises a spring (12), and two ends of the spring (12) are respectively fixedly connected to two pressing blocks (10).

7. The adjustable steering mechanism of a self-propelled crane according to claim 1, characterized in that: The top of the support frame (17) is rotatably connected to one end of the second electric push rod (14), and the other end of the second electric push rod (14) is rotatably connected to the outside of the connecting rod (6).

8. The adjustable steering mechanism of a self-propelled crane according to claim 5, characterized in that: The outer edges of the electric push rod (7) and the mounting groove (9) are both provided with bevel angles.

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