Walking type electric tractor

Abstract

The utility model relates to the technical field of tractors, and particularly discloses a walking type electric tractor which comprises a tractor frame body, a driving assembly, a traction assembly and a clamping assembly, the traction assembly comprises a traction arm with one end rotatably connected with the tractor frame body, and the clamping assembly comprises a clamp fixed to the other end of the traction arm. The traction arm is rotationally connected with the frame body, steering is facilitated, the traction arm can rotate to avoid a battery bin opening located in the top of the frame body, loading and unloading of a battery are facilitated, meanwhile, after the traction arm laterally moves by a certain distance, the traction arm can be locked through the locking piece, and the situation that the traction arm automatically resets and hits people or other objects is avoided; and in addition, the clamp can be suitable for trolley transverse rods of different heights, and the application performance of the tractor is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of towing vehicle, especially walking type electric towing vehicle. BACKGROUND

[0002] With the development of society and the improvement of people's life or level, various logistics carrying places such as factory, airport, railway station and so on often need to use trolley to carry luggage or goods. Then, it is more laborious for users to use manual trolley to push full of goods in these occasions, especially in long-distance carrying or the case where there is slope, so electric towing vehicle appears in the market to solve the problem.

[0003] But the existing electric towing vehicle often uses rope or fixed towing arm to drive trolley to displace, but it has the following shortcomings: one, using rope to tow is easy to cause rope winding into the wheel, which is more dangerous; two, using fixed towing arm is more rigid in turning, and since the battery compartment can only be arranged at the side of the frame due to the fact that the towing arm is usually located at the top of the trolley, it is inconvenient to install and is easy to enter water; three, the model of the towing arm can usually only be suitable for one model of trolley, and the applicability is poor. SUMMARY

[0004] The utility model considers the foregoing problem and makes, the utility model aims at providing a walking type electric towing vehicle, the avoidance of the opening of the battery compartment can be realized through the rotation of the towing arm, the battery is convenient to load and unload, and the towing arm can be locked after lateral displacement, and the safety performance is high.

[0005] To achieve the above object, the utility model provides a walking type electric towing vehicle for towing trolley, the towing vehicle includes frame main body, drive assembly, towing assembly and clamping assembly, the frame main body is equipped with the battery compartment of the opening in its top, the drive assembly includes the drive wheel at the bottom of the frame main body and the battery in the battery compartment, the battery is electrically connected with the drive wheel, the towing assembly includes the towing arm rotatable at one end and the top of the frame main body, the clamping assembly includes the clamp for clamping the trolley, the clamp is installed on the one end of the towing arm away from the frame main body,

[0006] The towing assembly further includes the elastic member and the locking member connected with the towing arm, the towing arm has the first position in the middle and the second position of lateral displacement, the towing arm can be rotated to the second position to avoid the opening of the battery compartment, the elastic member is used to drive the towing arm to keep in the first position, when the towing arm is located at the second position, the locking member can be connected with the top of the frame main body to lock the towing arm.

[0007] The walking electric tractor according to the above further comprises a first mounting seat, a rotating shaft and a positioning frame, the first mounting seat is detachably fixed on the top of the frame body by screws, and the positioning frame is fixed on one end of the traction arm and rotatably connected with the first mounting seat through the rotating shaft.

[0008] The elastic member is a torsion spring, and the torsion spring is sleeved outside the rotating shaft.

[0009] The walking electric tractor according to the above, the locking member is a spring bolt, the positioning frame is provided with a first positioning hole, the first mounting seat is provided with a second positioning hole, when the traction arm rotates to the second position, the first positioning hole and the second positioning hole are communicated, and the spring bolt can be inserted into the communication hole of the first positioning hole and the second positioning hole.

[0010] The walking electric tractor according to the above, the spring bolt comprises a base and an elastic plug, the elastic plug is arranged on the base and can rotate around the base, the top of the base is provided with a first clamping groove and a second clamping groove arranged in cross, the depth of the first clamping groove is greater than that of the second clamping groove, one side of the elastic plug is provided with a limiting part, and the limiting part can be clamped in the first clamping groove or the second clamping groove.

[0011] When the limiting part is located in the first clamping groove, the lower end of the elastic plug protrudes below the base, and when the limiting part is located in the second clamping groove, the lower end of the elastic plug is retracted into the base.

[0012] The walking electric tractor according to the above, the first mounting seat is provided with a limiting column, when the torsion spring drives the traction arm to rotate to the first position, one end of the torsion spring abuts against the limiting column to limit the continuous rotation of the traction arm.

[0013] The walking electric tractor according to the above, the clamp comprises a positioning plate, a chuck and a first limiting plate, the chuck is fixed on the positioning plate, and the chuck and the first limiting plate form a clamping space for clamping the cart cross rod.

[0014] The walking electric tractor according to the above, the clamping assembly further comprises a second mounting seat, a motor, a connecting rod and a piston rod, the second mounting seat is fixed on the end of the traction arm away from the frame body and can be lifted, the positioning plate is swingably connected with the second mounting seat through the connecting rod, and the motor is fixed on the second mounting seat and connected with the connecting rod through the piston rod.

[0015] The bottom of the battery compartment is provided with a second limiting plate, a guide column and a plug male head, a plurality of the second limiting plates enclose a guide area for the bottom end of the battery to be inserted, the top of the battery is provided with a handle, and the bottom of the battery is provided with a third positioning hole and a plug female head, the guide column can be inserted into the third positioning hole, and the plug male head can be inserted into the plug female head.

[0016] The walking electric traction vehicle further comprises a charging port arranged on one side of the frame body and electrically connected with the battery.

[0017] The walking electric traction vehicle further comprises a first universal wheel and an operation handle, the driving wheel is located at the front end of the bottom of the frame body, the first universal wheel is located at the tail end of the bottom of the frame body, the operation handle is used for controlling the driving wheel, and the frame body is rotatably arranged on the driving wheel.

[0018] When the clamping assembly is connected with the trolley, the first universal wheel is in a suspended state, and when the clamping assembly is separated from the trolley, the first universal wheel can be connected with the ground.

[0019] The walking electric traction vehicle has the following beneficial effects:

[0020] 1. The traction arm is rotatably connected with the frame body, which is beneficial to steering, and the rotation of the traction arm can avoid the battery compartment opening on the top of the frame body, facilitating the loading and unloading of the battery, and the traction arm can be locked by the locking member after moving a certain distance, avoiding the automatic reset of the traction arm to hit people or other objects, and improving the safety performance.

[0021] 2. When the traction arm moves to the second position, the limiting portion of the elastic rotary plug is connected with the first clamping groove, and under the action of the elastic force, the elastic rotary plug is automatically inserted into the communication hole between the first positioning hole and the second positioning hole, and is quickly positioned.

[0022] 3. The second mounting seat is fixed on the end of the traction arm away from the frame body, so that the overall height of the clamping assembly can be adjusted, and the trolley cross rod of different heights can be clamped, and the applicability is good.

[0023] 4. The battery can be guided by the plurality of second limiting plates, and the battery can be quickly installed by the guide column and the plug male head.

[0024] 5、The first universal wheel is in the process of being pulled by the towing vehicle. Since the towing arm is connected with the trolley through the clamping assembly, the height of the rear end of the frame body is increased, and the height of the first universal wheel is also increased, so that the first universal wheel is in a suspended state, improving the passability. When the towing vehicle is empty, the rear end of the frame body is lowered, and the first universal wheel is connected with the ground at this time, playing a supporting role, and the turning radius is very small. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is an assembly diagram of the towing vehicle and the trolley of the embodiment;

[0026] Figure 2 is a structure diagram of the towing vehicle in an empty state of the embodiment;

[0027] Figure 3 is a structure diagram of the towing assembly of the embodiment;

[0028] Figure 4 is a structure diagram of the spring latch of the embodiment;

[0029] Figure 5 is a structure diagram of the clamping assembly of the embodiment;

[0030] Figure 6 is a structure diagram of the battery and the bottom of the battery compartment of the embodiment;

[0031] Figure 7 is a structure diagram of the bottom of the battery of the embodiment.

[0032] In the drawings:

[0033] 1、frame body; 111、second limiting plate; 112、guide column; 113、plug male; 12、charging port;

[0034] 2、drive assembly; 21、drive wheel; 22、battery; 221、third positioning hole; 222、plug female; 223、handle; 23、first universal wheel; 24、operation handle;

[0035] 3、towing assembly; 31、towing arm; 32、torsional spring; 33、spring latch; 331、base; 331a、first clamping groove; 331b、second clamping groove; 332、elastic plug; 332a、limiting part; 34、first mounting seat; 341、second positioning hole; 342、limiting column; 35、rotation shaft; 36、positioning frame;

[0036] 4、clamping assembly; 41、positioning plate; 42、collet; 43、first limiting plate; 44、second mounting seat; 45、motor; 46、connecting rod; 47、piston rod;

[0037] 5、trolley. DETAILED DESCRIPTION

[0038] The utility model discloses the specific embodiment below and the combination of drawings, and the technical scheme of the utility model is further described, but the utility model is not limited to these embodiments.

[0039] As Figures 1-7 The utility model discloses a walking electric tractor for towing a cart 5, comprising a frame body 1, a drive assembly 2, a traction assembly 3 and a clamping assembly 4.

[0040] Specifically, a battery compartment with an opening at the top of the frame body 1 is provided, and the opening of the battery compartment is positioned on the frame body 1. During the installation of the battery 22, the battery 22 only needs to be placed vertically along the opening. The drive assembly 2 includes a drive wheel 21 at the bottom of the frame body 1 and a battery 22 in the battery compartment. The battery 22 is electrically connected to the drive wheel 21 and is used to provide electrical energy for the drive wheel 21. The traction assembly 3 includes a traction arm 31 with a first end rotatably connected to the top of the frame body 1. The clamping assembly 4 includes a clamp for clamping the cart 5, which is installed on the end of the traction arm 31 away from the frame body 1. After the clamp clamps the cart 5, the drive wheel 21 can drive it to move, thereby driving the cart to move. During the steering of the drive wheel 21, the traction arm 31 can rotate relative to the frame body 1, making it easier to steer.

[0041] In this embodiment, the front end of the cart 5 at the bottom is provided with a universal wheel, and the rear end of the cart at the bottom is provided with a directional wheel. During the steering of the frame body 1 driven by the drive wheel 21, the traction arm 31 rotates relative to the frame body 1, and then the frame body 1 drives the cart to steer.

[0042] Specifically, the traction assembly 3 further includes a spring and a locking member connected to the traction arm 31. The traction arm 31 has a first position in the middle and a second position for lateral movement. The traction arm 31 can be rotated to the second position to avoid the opening of the battery compartment. The spring is used to drive the traction arm 31 to remain in the first position. When the traction arm 31 is in the second position, the locking member can be connected to the top of the frame body 1 to lock the traction arm 31. During the straight driving of the cart by the traction arm 31, it mainly remains in the first position. When the traction arm 31 is not needed, it can be manually driven to the second position and then locked by the locking member to avoid automatic resetting due to the spring, thereby avoiding automatic resetting and hitting people or other objects.

[0043] The first position of the traction arm 31 is in the middle of the tail end of the frame body 1, and the elastic member provides elastic force to keep the traction arm 31 in the first position. The second position is the position of the traction arm 31 after rotating a preset angle to the left or right. Of course, a third position can also be provided, which is symmetrically arranged on both sides of the first position.

[0044] Specifically, the traction assembly 3 further comprises a first mounting seat 34, a rotating shaft 35 and a positioning frame 36. The first mounting seat 34 is detachably fixed on the top of the frame body 1 by screws. The positioning frame 36 is fixed on one end of the traction arm 31 and rotatably connected with the first mounting seat 34 through the rotating shaft 35. That is, the traction arm 31 is rotatably connected with the first mounting seat 34 through the positioning frame 36 and the rotating shaft 35. The first mounting seat 34 can be quickly connected with the frame body 1. The elastic member is a torsion spring 32 which is sleeved on the outside of the rotating shaft 35. The torsion spring 32 can exert elastic force on the rotating shaft 35, and drive the traction arm 31 to rotate to the first position through the rotating shaft 35.

[0045] The first mounting seat 34 is provided with a limiting column 342. When the torsion spring 32 drives the traction arm 31 to rotate to the first position, one end of the torsion spring 32 abuts against the limiting column 342 to limit the continuous rotation of the traction arm 31. That is, after the locking member unlocks the traction arm 31, the torsion spring 32 can exert a restoring force on the traction arm 31 and drive the traction arm 31 to rotate to the first position. After resetting, the torsion spring 32 generally still has elastic force which is limited by the limiting column 342 to prevent the torsion spring 32 from continuously outputting elastic force on the traction arm 31, thereby ensuring accurate resetting.

[0046] Specifically, the locking member is a spring bolt 33. The positioning frame 36 is provided with a first positioning hole, and the first mounting seat 34 is provided with a second positioning hole 341. When the traction arm 31 rotates to the second position, the first positioning hole and the second positioning hole 341 are communicated, and the spring bolt 33 can be inserted into the communication hole of the first positioning hole and the second positioning hole 341. The spring bolt 33 has a spring inside which can drive the spring bolt 33 to move downward. When the traction arm 31 rotates to the second position, the spring inside the spring bolt 33 drives it to insert downward into the first positioning hole and the second positioning hole 341, thereby locking the traction arm 31. The locking is convenient and fast.

[0047] In order to avoid the interference of the automatic insertion of the spring latch 33 to the steering of the traction arm 31, the spring latch 33 comprises a base 331 and an elastic plug 332, the elastic plug 332 is arranged on the base 331 and can rotate around the base 331, the top of the base 331 is provided with a first clamping groove 331a and a second clamping groove 331b arranged in cross, the depth of the first clamping groove 331a is greater than that of the second clamping groove 331b, and a limiting portion 332a is arranged on one side of the elastic plug 332, the limiting portion 332a can be clamped in the first clamping groove 331a and the second clamping groove 331b, because the depth of the first clamping groove 331a is deeper, when the limiting portion 332a is located in the first clamping groove 331a, the lower end of the elastic plug 332 can extend below the base 331, and when the limiting portion 332a is located in the second clamping groove 331b, the lower end of the elastic plug 332 is retracted in the base 331, at this time, the elastic plug 332 can avoid rubbing with the first mounting seat 34, and avoid interfering with the rotation of the traction arm 31, in the normal use process of the traction arm 31, the elastic plug 332 is rotated, so that the limiting portion 332a remains in the second clamping groove 331b, when the traction arm 31 is not needed, the traction arm 31 is rotated to the second position, and then the elastic plug 332 is rotated, so that the limiting portion 332a remains in the first clamping groove 331a.

[0048] In order to adapt to different types of carts, the clamp comprises a positioning plate 41, a clamp head 42 and a first limiting plate 43, the clamp head 42 is fixed on the positioning plate 41, and the clamp head 42 and the first limiting plate 43 form a clamping space for clamping the cross bar of the cart 5, and the clamp head 42 and the first limiting plate 43 can cooperate to clamp the cross bar of the cart 5.

[0049] Specifically, the clamping assembly further comprises a second mounting seat 44, a motor 45, a connecting rod 46 and a piston rod 47, the second mounting seat 44 is fixed on the end of the traction arm 31 away from the main body 1 of the cart, and the overall height of the clamping assembly can be adjusted through the second mounting seat 44, which is suitable for cart cross bars of different heights, the positioning plate 41 is swingably connected to the second mounting seat 44 through the connecting rod 46, the motor 45 is fixed on the second mounting seat 44 and connected to the connecting rod 46 through the piston rod 47, the motor 45 drives the connecting rod 46 to swing through the piston rod 47, and then drives the positioning plate 41 to swing together, moving towards or away from the first limiting plate 43, realizing the clamping and releasing of the goods, in this embodiment, the connecting rod 46 and the positioning plate 41 form a parallelogram, so that the positioning plate 41 can still remain parallel to the first limiting plate 43 when it is driven to swing, preventing scratching the cart cross bar.

[0050] In order to realize the height adjustment of the second mounting seat 44, a mounting plate is arranged on one end of the traction arm 31, a plurality of mounting holes arranged in the vertical direction are arranged on the mounting plate, and the height adjustment of the second mounting seat 44 is realized through the mounting holes of different heights.

[0051] In order to realize the quick assembly of the battery 22, the bottom of the battery compartment is provided with a second limiting plate 111, a guide column 112 and a plug male head 113, a plurality of second limiting plates 111 are combined to form a guide area for the bottom end of the battery 22 to be inserted, and then the bottom end of the battery 22 is limited to be laterally displaced by the plurality of second limiting plates 111 after being contacted, the top of the battery 22 is provided with a handle 223, the handle 223 is used for holding, and the bottom of the battery 22 is provided with a third positioning hole 221 and a plug female head 222, the guide column 112 can be inserted into the third positioning hole 221, and the plug male head 113 can be inserted into the plug female head 222, when directly placed down, the guide column 112 is automatically assembled into the third positioning hole 221, and the plug male head 113 is automatically inserted into the plug female head 222, so that quick and accurate positioning and installation are realized.

[0052] In the embodiment, the charging port 12 is arranged on one side of the frame body 1, and the charging port 12 is electrically connected with the battery 22, so that the battery 22 can be charged on the outside of the frame body 1, and the battery 22 can also be taken out for charging.

[0053] Specifically, the driving assembly 2 further comprises a first universal wheel 23 and an operation handle 24, the driving wheel 21 is located at the front end of the bottom of the frame body 1, the first universal wheel 23 is located at the tail end of the bottom of the frame body 1, the operation handle 24 is used for controlling the driving wheel 21 and controlling the forward direction of the driving wheel 21, and the frame body 1 is rotatably arranged on the driving wheel 21, so that when the clamping assembly 4 is connected with the trolley, the traction arm 31 can increase the height of the tail end of the frame body 1, and the first universal wheel 23 is in a suspended state, so that the overall passability of the vehicle can be improved, and when the clamping assembly 4 is separated from the trolley, the first universal wheel 23 can be connected with the ground, thereby supporting the frame body 1, and the turning radius is relatively small.

[0054] The technical scheme of the utility model is described in detail above in combination with the drawings, and the described embodiments are used to help understand the idea of the utility model. The specific embodiments described in the text are only examples of the spirit of the utility model. Those skilled in the art to which the utility model belongs can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the utility model or exceed the range defined by the appended claims.

[0055] It should be noted that all directional indications (such as upper, lower, left, right, front, rear, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0056] In addition, the descriptions such as "first", "second", "one" and the like in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0057] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixing" and the like should be understood in a broad sense, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0058] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

Claims

1. A walk-behind electric tractor for towing a cart, characterized in that, The towing vehicle comprises a frame body, a driving assembly, a towing assembly and a clamping assembly, the frame body is provided with a battery compartment with an opening at the top, the driving assembly comprises a driving wheel at the bottom of the frame body and a battery in the battery compartment, the battery is electrically connected with the driving wheel, the towing assembly comprises a towing arm rotatably connected with the top of the frame body, and the clamping assembly comprises a clamp for clamping the cart, the clamp is mounted on the end of the towing arm away from the frame body. The towing assembly further comprises an elastic member and a locking member connected with the towing arm, the towing arm has a first position in the middle and a second position shifted to one side, the towing arm can be rotated to the second position to avoid the opening of the battery compartment, the elastic member is used to drive the towing arm to remain in the first position, and the locking member can be connected with the top of the frame body to lock the towing arm when the towing arm is in the second position.

2. A walk-around electric traction vehicle as claimed in claim 1, characterized in that The towing assembly further comprises a first mounting seat, a rotating shaft and a positioning bracket, the first mounting seat is detachably fixed on the top of the frame body by screws, and the positioning bracket is fixed on one end of the towing arm and rotatably connected with the first mounting seat through the rotating shaft. The elastic member is a torsion spring, and the torsion spring is sleeved on the outside of the rotating shaft.

3. A walkalbe electric traction vehicle according to claim 2, characterized in that The locking member is a spring latch, the positioning bracket is provided with a first positioning hole, the first mounting seat is provided with a second positioning hole, the first positioning hole and the second positioning hole are communicated when the towing arm is rotated to the second position, and the spring latch can be inserted into the communication hole of the first positioning hole and the second positioning hole.

4. A walkalbe electric traction vehicle according to claim 3, characterized in that The spring latch comprises a base and an elastic plug, the elastic plug is arranged on the base and can rotate around the base, the top of the base is provided with a first clamping groove and a second clamping groove arranged in cross, the depth of the first clamping groove is greater than that of the second clamping groove, one side of the elastic plug is provided with a limiting portion, and the limiting portion can be clamped in the first clamping groove or the second clamping groove. When the limiting portion is located in the first clamping groove, the lower end of the elastic plug protrudes below the base, and when the limiting portion is located in the second clamping groove, the lower end of the elastic plug is retracted into the base.

5. The electric walk-along tractor of claim 2, wherein, The first mounting seat is provided with a limiting column, and when the torsion spring drives the towing arm to rotate to the first position, one end of the torsion spring abuts against the limiting column to limit the continuous rotation of the towing arm.

6. The electric walk-along tractor of claim 1, wherein, The clamp comprises a positioning plate, a chuck and a first limiting plate, the chuck is fixed on the positioning plate, and the chuck and the first limiting plate form a clamping space for clamping the cross rod of the cart.

7. A walkalbe electric traction vehicle according to claim 6, characterized in that The clamping assembly further comprises a second mounting seat, a motor, a connecting rod and a piston rod, the second mounting seat is fixed on the end of the towing arm away from the frame body and can be lifted, the positioning plate is swingably connected with the second mounting seat through the connecting rod, the motor is fixed on the second mounting seat and connected with the connecting rod through the piston rod.

8. The electric walk-along tractor of claim 1, wherein, The bottom of the battery compartment is provided with a second limiting plate, a guide column and a plug male head, a plurality of the second limiting plates enclose a guide area for the bottom end of the battery to be inserted, the top of the battery is provided with a handle, and the bottom of the battery is provided with a third positioning hole and a plug female head, the guide column can be inserted into the third positioning hole, and the plug male head can be inserted into the plug female head.

9. A walkalbe electric traction vehicle according to claim 8, characterized in that One side of the frame body is provided with a charging port, and the charging port is electrically connected with the battery.

10. The electric walk-along tractor of claim 1, wherein, The driving assembly further comprises a first universal wheel and an operation handle, the driving wheel is located at the front end of the bottom of the frame body, the first universal wheel is located at the tail end of the bottom of the frame body, and the operation handle is used for controlling the driving wheel, and the frame body is rotatably arranged on the driving wheel. When the clamping assembly is connected with the trolley, the first universal wheel is in a suspended state, and when the clamping assembly is separated from the trolley, the first universal wheel can be connected with the ground.

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