Draw bar

Abstract

The utility model discloses a draw bar, which is used for controlling the speed and the direction of a vehicle body and comprises a tension handle, a steering rod and a controller, the tension handle is connected with the steering rod which is rotationally connected with the vehicle body; the controller is in communication connection with the tension handle and the steering rod and used for controlling the front-back direction and speed of the vehicle body according to a tension signal generated by the tension handle and controlling steering of the vehicle body according to a rotating signal generated by the steering rod. The traction rod controls the front-back direction and speed of the vehicle body through a tension signal of the tension handle and controls steering of the vehicle body through a rotation signal of the steering rod, a user can operate the tension handle with one hand to synchronously and continuously control the speed according to the operation requirement, and meanwhile the steering rod is driven to rotate along with the operation direction, so that the vehicle body follows the operation direction of the user; one-hand intelligent control of the operation speed and direction of a user can be met and followed, intelligence and operation convenience are achieved, and the direction and speed of the vehicle body can be intelligently controlled according to the operation requirement.

Description

TECHNICAL FIELD

[0001] The utility model relates to a vehicle body drive control device technical field especially relates to a draw bar. BACKGROUND

[0002] At present, the vehicle body generally adopts driving or non-driving drawbar driving mode. The driving mode cannot meet the operation and movement requirements at the same time, for example, the cleaning machine, the mower and the like adopt the driving mode to drive and control the vehicle body movement, and the driving mode cannot flexibly switch the working scene, for example, in the cleaning process, the cleaner cannot automatically clean the scene and needs to get off the vehicle to clean, and the movement and operation requirements cannot be met at the same time.

[0003] The non-driving drawbar driving mode consumes physical strength and cannot follow the operation requirements. For example, for the cleaning vehicle, the mobile dining car, the carrier, the pallet car and the handcart, the current non-driving force mode such as the handle or the drawbar is adopted to control the vehicle body movement, and the user needs to consume a large physical strength during the control process of the vehicle body movement, and the control process cannot be smoothly performed in the reverse direction, the steering and the like, the user needs to consume a very large physical strength, and the inertia, the manual steering and the like need to be overcome.

[0004] At present, in order to solve the above problems, the prior art proposes an integrated electric rod, and the button is adopted to control the forward movement and the stop. The above electric rod adopts a small gear position such as low, medium and high, and cannot continuously control the speed and intelligently follow the steering operation requirement, that is, the speed and the steering intelligent control cannot be realized according to the user operation requirement (for example, the speed and the direction requirement of the human operation process during the operation of the cleaning and the mobile dining car) to control the vehicle body movement. At the same time, the above electric rod cannot be operated by one hand and the other hand is used for operation. SUMMARY

[0005] In order to further improve the intelligence and the operation convenience of the vehicle body movement and more meet the speed and the direction of the one-hand intelligent control of the user operation, the utility model provides a draw bar.

[0006] In order to achieve the above purpose, the utility model provides a draw bar for controlling the speed and the direction of the vehicle body, characterized in that the draw bar comprises a pulling handle, a steering rod and a controller, the pulling handle is connected with the steering rod, the steering rod is rotationally connected with the vehicle body, the controller is in communication connection with the pulling handle and the steering rod, and the controller is used for controlling the forward and backward directions and the speed of the vehicle body according to the pulling force signal generated by the pulling handle and controlling the steering of the vehicle body according to the rotation signal generated by the steering rod.

[0007] Optionally, the pulling force signal comprises the pulling force size and the pulling force direction, the controller controls the vehicle body to move forward or backward according to the pulling force direction and controls the speed of the vehicle body according to the pulling force size.

[0008] Optionally, the pulling handle comprises: an arc-shaped pulling rod and a force sensor; the pulling handle generates the pulling force and the pulling direction through the arc-shaped pulling rod; the force sensor is connected with the arc-shaped pulling rod and is used for sensing the pulling force and the pulling direction of the arc-shaped pulling rod.

[0009] Optionally, the pulling handle further comprises: an inner shaft; the arc-shaped pulling rod and the force sensor are connected through the inner shaft.

[0010] Optionally, the pulling handle further comprises: a bracket and a sliding piece; the force sensor and the inner shaft are arranged in the bracket; the sliding piece is fixed in the bracket; the inner shaft is slid on the bracket through the sliding piece.

[0011] Optionally, the pulling handle further comprises: a sleeve; the inner shaft is sleeved in the sleeve; the sleeve is connected with the bracket through the sliding piece.

[0012] Optionally, the sliding piece comprises: a linear bearing and a first damping rotating shaft; the sleeve is sleeved on the linear bearing and the first damping rotating shaft.

[0013] Optionally, the pulling handle further comprises: a hinge and a bearing; the inner shaft and the force sensor are fixed and connected through the hinge; the inner shaft is fixed on the hinge through the bearing.

[0014] Optionally, the rotation signal comprises: a rotation angle; the steering rod comprises: a connecting rod and an angle sensor; the connecting rod is rotationally connected with the vehicle body; the steering rod generates the rotation angle through the connecting rod; the angle sensor is used for measuring the rotation angle of the connecting rod.

[0015] Optionally, the traction rod further comprises: a start-stop control unit, the start-stop control unit is used for controlling the working state of the traction rod, and the working state comprises: a starting state and a stopping state.

[0016] The utility model has the following beneficial effects:

[0017] 1. The controller of the traction rod controls the front and rear directions and speed of the vehicle body through the tension signal generated by the tension handle and controls the steering of the vehicle body through the rotation signal of the steering rod. During the operation process, the user can operate the tension handle with one hand to continuously control the speed and front and rear directions according to the operation needs of the user, and the steering rod is driven to rotate along with the operation direction when the tension handle is operated, so that the vehicle body follows the operation direction of the user. The speed and direction of the user can be controlled intelligently with one hand, which has intelligence and operation convenience, overcomes the control defects that the existing button direction operation cannot intelligently follow the operation needs, and can intelligently control the direction and speed of the vehicle body.

[0018] 2. The tension handle of the traction rod can also control the forward or backward direction of the vehicle body through the tension direction, further improving the convenience of the vehicle body control.

[0019] 3. The sliding part of the tension handle of the connecting rod of the traction rod comprises a linear bearing and a damping rotating shaft, the arc-shaped pull rod and the inner shaft slide through the linear bearing and the damping rotating shaft, so that the arc-shaped pull rod and the inner shaft can generate tension in linear motion, and can also rotate, avoiding hand discomfort caused by long-time operation of the arc-shaped pull rod at the same angle, and different height operations of the rotating arc-shaped pull rod can meet the needs of different crowds.

[0020] 4. The inner shaft of the traction rod and the force sensor are fixed and connected through the hinge, and the inner shaft is fixed on the hinge through the bearing, so that when the inner shaft and the arc-shaped pull rod rotate, the hinge keeps the force balance, so that the arc-shaped pull rod can stop at any angle, further improving the comfort of operating the arc-shaped pull rod. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 is a structural schematic view of an embodiment of the traction rod of the utility model;

[0022] Fig. 2 is a structural cross-sectional schematic view of an embodiment of the tension handle of the utility model;

[0023] Fig. 3 is a structural cross-sectional schematic view of an embodiment of the steering rod of the utility model.

[0024] EXPLANATION OF REFERENCE NUMBERS:

[0025] 1, pull handle; 11, arc-shaped pull rod; 12, force sensor; 13, inner shaft; 14, support; 15, fixing piece; 16, sleeve; 17, linear bearing; 18, first damping rotating shaft; 19, damping fixing plate; 120, hinge; 121, first bearing; sealing ring 122; 2, steering rod; 21, connecting rod; 22, angle sensor; 23, rotating shaft box; 24, rotating shaft; 25, fixed support; 251, fixed base; 252, mounting cylinder; 2521, bottom cover; 2522, cylinder body; 2523, wire hole; 2524, second damping rotating shaft; 2525, second bearing; 2526, angle sensor mounting rack; 3, start-stop button. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purpose, features and advantages of the utility model more apparent and easy to understand, the specific embodiments of the utility model are described in detail below in combination with the drawings. In the following description, a lot of specific details are set forth in order to fully understand the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0027] REFERENCE Figs. 1-3 A traction rod is installed on a vehicle body and used to control the speed and direction of the vehicle body, comprising a pull handle 1, a steering rod 2 and a controller (not shown), the pull handle 1 is connected with the steering rod 2, and the steering rod is rotationally connected with the vehicle body; the pull handle 1 is used to generate a pulling force signal; the steering rod 2 is used to generate a rotating signal; the pull handle 1 and the steering rod 2 are both in communication connection with the controller, the controller is installed on the traction rod or the vehicle body, and is used to control the forward and backward directions and speed of the vehicle body according to the pulling force signal and the steering of the vehicle body according to the rotating signal.

[0028] The pull handle 1 generates a pulling force signal in a pulling manner; specifically, the pulling force signal includes a pulling force size and a pulling force direction, the controller controls the vehicle body to move forward or backward according to the pulling force direction generated by the pull handle 1 and controls the speed of the vehicle body to move forward or backward according to the pulling force size generated by the pull handle 1. The steering rod 2 is rotationally connected with the vehicle body and generates a steering signal in a rotating manner, and the steering signal includes a rotating angle.

[0029] REFERENCE Fig. 2The tension handle 1 comprises an arc-shaped pull rod 11, a force sensor 12, an inner shaft 13 and a bracket 14. The tension handle generates a tension force through the arc-shaped pull rod 11. The arc-shaped pull rod 11 is connected with the force sensor 12. The force sensor 12 is connected with the controller in communication. The force sensor 12 senses the tension force and the direction of the tension force of the arc-shaped pull rod 11 and transmits the tension force and the direction of the tension force to the controller. The controller controls the vehicle to move forward or backward and the speed of moving forward or backward according to the direction and the size of the tension force transmitted by the force sensor 12. The arc-shaped pull rod 11 and the force sensor 12 are connected through the inner shaft 13. Specifically, one end of the inner shaft 13 is connected with the arc-shaped pull rod 11 and the other end of the inner shaft 13 is connected with the force sensor 12. The force sensor 12 is fixedly arranged at one end inside the bracket 14. The inner shaft 13 is arranged at the other end inside the bracket 14. One end of the arc-shaped pull rod 11 is slidably connected with the other end of the bracket 14. During use, when the arc-shaped pull rod 11 is pulled, the inner shaft 13 is driven to slide in the bracket 14, so that the force sensor 13 senses the tension force signal. The greater the pulling distance, the greater the tension force, and vice versa. According to the direction in which the user pulls the arc-shaped rod 11 forward or backward, the force sensor generates a corresponding tension force signal in different directions.

[0030] Further, the tension handle 1 further comprises a fixing member 15. The inner shaft 13 and the force sensor 12 are fixed through the fixing member 15.

[0031] Further, the tension handle 1 further comprises a sleeve 16 and a sliding member. The inner shaft 13 is sleeved in the sleeve 16 and connected with the arc-shaped pull rod 11 through the sleeve 16. One end of the sleeve 16 is sleeved on the inner wall of one end of the arc-shaped pull rod 11. The sliding member is fixed in the bracket 14. The sleeve 16 is connected with the bracket 14 through the sliding member and can slide on the bracket 14 through the sliding member. The arc-shaped pull rod 11, the inner shaft 13 and the sleeve 16 can move along the axis direction of the bracket 14, so that the force sensor 12 senses the tension force signal.

[0032] Further, the sliding member comprises a linear bearing 17, a first damping rotating shaft 18 and a damping fixing plate 19. A part of the sleeve 16 is sleeved on the linear bearing 17. The linear bearing 17 is fixed on the bracket 14. The other end of the sleeve 16 is sleeved on the first damping rotating shaft 18. The first damping rotating shaft 18 is installed on the fixing member 15 through the damping fixing plate 19.

[0033] Further, the fixing member 15 comprises a hinge 120, and the inner shaft 13 and the force sensor 12 are fixed and connected through the hinge 120 to realize force balance when the tension pull rod 11, the inner shaft 13 and the sleeve 16 rotate, so that the tension pull rod 11 can stop at any angle, and the user can rotate the arc-shaped handle during operation, which is convenient for the user to operate and adapts to the change of hand force during operation to improve the comfort of the hand.

[0034] Further, the fixing member further comprises a first bearing 121, and the inner shaft 13 is fixed on the hinge 120 through the first bearing 121 to enable the inner shaft 13 to slide at the hinge 120. The damping fixing plate 19 is installed on the first bearing 121.

[0035] Further, the tension handle 1 further comprises a sealing ring 122, and the sealing ring 122 is arranged between the arc-shaped pull rod 11 and the support 14 to seal the internal structure of the arc-shaped pull rod 11 and the support 14 from dust and water.

[0036] Further, the arc-shaped pull rod 11 and the sleeve 16 are integrally formed or fixed through a fixing member. In this embodiment, the sleeve 16 and the arc-shaped pull rod 11 are fixed through screws.

[0037] Further, the sleeve 16 is a multi-step rotating shaft, which comprises a first step, a second step, a third step and a fourth step. The diameters of the first step to the fourth step are gradually reduced, and the first step, the second step, the third step and the fourth step are respectively sleeved in the arc-shaped pull rod 11, the linear bearing 17, the first damping rotating shaft 18 and the damping fixing plate 19. A limiting ring is further arranged between the first step and the second step, the diameter of the limiting ring is greater than that of the first step, and the limiting ring is integrally formed with the first step to cooperate with the screw rod to fix and limit the sleeve 11 and the arc-shaped pull rod 11.

[0038] Further, the support 14 is a split structure, which comprises a first part and a second part. The linear bearing 17, the first damping rotating shaft 18, the damping fixing plate 19 and part of the hinge 120 are installed on the first part, and the other part of the hinge 120 and the force sensor 12 are installed on the second part. The inner wall diameter of the first part on which the linear bearing 17 is installed is smaller than the inner wall diameter of the first part on which the first damping rotating shaft 18 is installed, so as to fix the first damping rotating shaft 18. The arc-shaped pull rod 11 and the inner shaft 13 are hollow structures, and the second part has a wiring hole at the bottom to supply the signal lines of the arc-shaped pull rod 11 and the force sensor 12.

[0039] Further, the inner shaft 13 is a multi-step shaft, and the diameter of the whole or part of the sleeve 16 is greater than that of the damping fixed sheet 19.

[0040] With reference to Fig. 3 The steering rod 2 comprises a connecting rod 21 and an angle sensor 22. The support 11 of the pull handle 1 is sleeved with one end of the connecting rod 21, and the other end of the connecting rod 21 is rotationally connected with the vehicle body. The angle sensor 22 is used for measuring the rotation angle of the connecting rod 21. The angle sensor 22 is in communication connection with the controller and transmits the rotation angle of the connecting rod 21 to the controller. The controller controls the steering of the vehicle body according to the rotation angle of the connecting rod 21.

[0041] Further, the support 11 of the pull handle 1 is fixedly connected with the connecting rod 21 through a screw rod.

[0042] The steering rod 2 further comprises a rotating shaft box 23, a rotating shaft 24 and a fixed support 25. The connecting rod 21 is fixedly connected with the rotating shaft box 23. The rotating shaft 24 is arranged on the rotating shaft box 23. The connecting rod 21 and the rotating shaft box 23 are rotatable relative to the vehicle body through the rotating shaft 24. The rotating shaft 24 is installed on the fixed support 25. The fixed support 25 is installed on the vehicle body. The connecting rod 21 and the rotating shaft box 23 are rotationally connected with the vehicle body through the rotating shaft 24 and the fixed support 25. The angle sensor 22 is installed on the rotating shaft 24.

[0043] The fixed support 25 comprises a fixed base 251 and a mounting cylinder 252. The fixed base 251 is installed on the vehicle body. The mounting cylinder 252 is installed on the fixed base 251.

[0044] Further, the mounting cylinder 252 comprises: a bottom cover 2521, a cylinder body 2522, a wiring hole 2523, a second damping shaft 2524, a second bearing 2525, and an angle sensor mounting rack 2526; the bottom cover 2521 is fixedly connected with the bottom of the cylinder body 2522, and the fixed base 251 is fixedly connected with the bottom cover 2521 of the mounting cylinder 252; one end of the shaft 24 is mounted on the bottom cover 2521 through the second damping shaft 2524, and the other end of the cylinder body 2522 is provided with the second bearing 2525; the shaft 24 is connected with the top of the cylinder body 2522 through the second bearing 2525, and the cylinder body 2522 is further provided with the angle sensor mounting rack 2526; the fixed part of the angle sensor 22 is arranged on the angle sensor mounting rack 2526, and the rotating part of the angle sensor 22 is arranged on the shaft 24; the wiring hole 2523 is arranged on the cylinder body 2522, and the shaft 24 is provided with a groove at a corresponding position so as to lead out the lines of the tension handle, the connecting rod 21 and the angle sensor 22 from the wiring hole 2523.

[0045] Further, the arc-shaped pull rod 11 is arranged in an arc shape, so that part of the arc-shaped pull rod 11 is in front of the human body, thereby facilitating the operation and control of the traction rod.

[0046] Further, the traction rod further comprises: a start-stop control unit, which is used to control the working state of the traction rod, and the working state comprises: a starting state and a stopping state.

[0047] Further, the start-stop control unit comprises: a start-stop button 3; when the start-stop button 3 controls the traction rod to be in the starting state, the user can control the speed and direction of the vehicle body through the traction rod; when the start-stop button 3 controls the traction rod to be in the stopping state, the traction rod cannot control the speed and direction of the vehicle body.

[0048] Further, the start-stop button 3 is arranged at one end of the arc-shaped pull rod 11, so as to facilitate the operation of the user.

[0049] In another embodiment, the traction rod further comprises: a drive wheel, which is mounted on the vehicle body or the steering rod 2 through a fixing structure; the controller is in communication connection with the drive wheel, and controls the speed and direction of the movement of the vehicle body by controlling the drive wheel. For a vehicle body without a driving system, the speed and direction of the movement of the vehicle body are realized by adding the drive wheel and the traction rod, thereby saving physical strength.

[0050] The traction rod is rotatably installed on the vehicle body through the fixing support 25, the user determines whether the traction rod is started or stopped through the start-stop button, when being in the starting state, that is, when the vehicle body movement is controlled through the traction rod, the user pushes and pulls the arc-shaped pull rod 11 of the pull handle 1, the force sensor 12 measures the pull force size and the pull force direction of the arc-shaped pull rod 11, the controller is connected with the force sensor 12, the controller controls the vehicle body to advance or retreat and the advancing or retreating speed according to the pull force direction and the pull force size measured by the force sensor 12. Meanwhile, the user applies the steering force to the pull handle 1 or the steering rod 2, so that the steering rod 2 rotates relative to the vehicle body, the angle sensor 22 measures the steering angle size of the steering rod 2, so as to control the steering of the vehicle body. Meanwhile, the traction rod of the utility model can also increase the driving wheel, for the vehicle body without driving system, the driving wheel is installed on the vehicle body or the mounting support, the movement control of the traction rod is realized.

[0051] The technical features of the above embodiments can be combined in any manner. To make the description simple, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not contradict, they should be considered as the scope of the present application.

[0052] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as the limitation of the scope of the present application. It should be pointed out that, for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A tow bar for controlling the speed and direction of a vehicle body, characterised in that, The traction handle (1), the steering rod (2) and the controller; the traction handle (1) is connected with the steering rod, the steering rod (2) is rotatably connected with the vehicle body; the controller is communicatively connected with the traction handle (1) and the steering rod, for controlling the front and back directions and the speed of the vehicle body according to the traction signal generated by the traction handle (1) and controlling the steering of the vehicle body according to the rotation signal generated by the steering rod (2). The traction handle (1) includes: an arc-shaped pull rod (11) and a force sensor (12); a user pushes and pulls the arc-shaped pull rod (11) to generate the traction signal; the force sensor (12) is connected with the arc-shaped pull rod (11) and is used for sensing the traction signal of the arc-shaped pull rod (11); the force sensor is communicatively connected with the controller and transmits the traction signal to the controller. The traction signal includes: the size of the traction and the direction of the traction; the controller controls the vehicle body to move forward or backward according to the direction of the traction and controls the speed of the vehicle body according to the size of the traction.

2. The draw bar of claim 1 wherein, The traction handle (1) further includes: an inner shaft (13); the arc-shaped pull rod (11) and the force sensor (12) are connected through the inner shaft (13).

3. The draw bar of claim 1 wherein, The traction handle (1) further includes: a bracket (14) and a sliding member; the force sensor (12) and the inner shaft (13) are arranged inside the bracket (14), the sliding member is fixed inside the bracket (14), and the inner shaft (13) slides on the bracket (14) through the sliding member.

4. The draw bar of claim 3 wherein, The traction handle (1) further includes: a sleeve (16); the inner shaft (13) is sleeved inside the sleeve (16); the sleeve (16) is connected with the bracket (14) through the sliding member.

5. The draw bar of claim 4 wherein, The sliding member includes: a linear bearing (17) and a first damping rotating shaft (18); the sleeve (16) is sleeved on the linear bearing (17) and the first damping rotating shaft (18).

6. The draw bar of claim 5 wherein, The traction handle (1) further includes: a hinge (120) and a first bearing (121); the inner shaft (13) and the force sensor (12) are fixed and connected through the hinge (120), and the inner shaft (13) is fixed on the hinge (120) through the bearing (121).

7. Drawbar according to any one of claims 3-6, characterized in that The rotation signal includes: a rotation angle; the steering rod (2) includes: a connecting rod (21) and an angle sensor (22); the connecting rod (21) is rotatably connected with the vehicle body; the steering rod generates the rotation angle through the connecting rod; the angle sensor (22) is used for measuring the rotation angle of the connecting rod (21).

8. Drawbar according to any one of claims 1-6, characterized in that The traction rod further includes: a start-stop control unit, the start-stop control unit is used for controlling the working state of the traction rod, and the working state includes: a starting state and a stopping state.

9. Drawbar according to any one of claims 1-6, characterized in that ​

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