CN210884729U

CN210884729U - Electric wire winding and unwinding devices reaches benefit electricity dolly that contains it

Info

Publication number: CN210884729U
Application number: CN201920988157.8U
Authority: CN
Inventors: 丁宇; 吴如春; 张唯
Original assignee: Continental Investment China Co ltd
Current assignee: Continental Investment China Co ltd
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-06-30
Anticipated expiration: 2029-06-28

Abstract

The utility model discloses an embodiment discloses an electric wire winding and unwinding devices for meneing electric dolly, including stiff end, rectangle line frame and actuating mechanism. The fixed end is used for fixing the tail end of the charging wire, wherein the tail end is the other end opposite to the charging end of the charging wire; the opposite sides of the rectangular wire frame respectively consist of a group of horizontal connecting rods and a group of spiral screw rods, the horizontal connecting rods are sleeved on the spiral screw rods, and at least one of the horizontal connecting rods can move along the spiral screw rods when the spiral screw rods rotate; the charging wire is wound on the outer sides of the group of horizontal connecting rods, can be gradually tightened along with the back-to-back movement of the horizontal connecting rods, and is gradually loosened along with the opposite movement of the horizontal connecting rods; the driving mechanism comprises a direct current motor to drive the spiral screw rod to rotate. The utility model discloses can receive and release thick, the great cable of bend radius automatically. The utility model also provides an electricity supplementing trolley with the electric wire winding and unwinding device.

Description

Electric wire winding and unwinding devices reaches benefit electricity dolly that contains it

Technical Field

The utility model relates to an electric automobile field, in particular to mend electric wire winding and unwinding devices of electric dolly, and contain this electric wire winding and unwinding devices's benefit electricity dolly.

Background

At present, most of electric automobiles adopt a vertical charging pile to charge, but the installation position of a vertical charging device is fixed, so that the charging requirement of the electric automobiles increasing day by day cannot be met, and therefore, the electricity supplementing trolley is the development trend in the field of the electric automobiles at present. However, electric automobile's charging wire is thicker, and bending radius is great, if twine at will, when the charging wire after the book is crossed charges, the charging wire can be in duration of time under the condition of high voltage high current, will lead to the charging wire to receive the aggravation of book part damage like this, the condition of electric leakage is taken place to the most likely to take place to harm to user's life safety.

Lack the electric wire winding and unwinding devices who is applicable to thick type electric wire among the prior art, especially lack the electric wire winding and unwinding devices who is applicable to the benefit electricity dolly, the charging wire can't be retrieved automatically after using, if not through the manual winding of manual with the charging wire, the charging wire of placing outside has probably been pressed by the car or causes the interference to the normal driving of car.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model discloses an embodiment discloses an electric wire winding and unwinding devices for meneing electric dolly, including stiff end, rectangle line frame and actuating mechanism. The fixed end is used for fixing the tail end of the charging wire, wherein the tail end is the other end opposite to the charging end of the charging wire; the opposite sides of the rectangular wire frame respectively consist of a group of horizontal connecting rods and a group of spiral screw rods, the horizontal connecting rods are sleeved on the spiral screw rods, and at least one of the horizontal connecting rods can move along the axial direction of the spiral screw rods when the spiral screw rods rotate; the charging wire is wound on the outer sides of the group of horizontal connecting rods, gradually tightened along with the back-to-back movement of the horizontal connecting rods and gradually loosened along with the opposite movement of the horizontal connecting rods; the driving mechanism comprises a direct current motor to drive the spiral screw rod to rotate.

Because the cable for charging the electric automobile is very thick, the cable can cause damage and bring potential safety hazard when being folded, and therefore the traditional disc-type winding and unwinding device is not suitable for the cable of the type. By adopting the technical scheme, the cable with a thick thickness and a large bending radius can be automatically wound and unwound, and the charging wire winding and unwinding device is particularly suitable for winding and unwinding the charging wire of the electric automobile.

Optionally, the electric wire winding and unwinding device further comprises a transmission gear and a synchronous belt, the transmission gear comprises a first transmission gear and a second transmission gear, the first transmission gear and the second transmission gear are respectively meshed with the screw rods, and the synchronous belt is connected with the first transmission gear and the second transmission gear.

Optionally, the wire winding and unwinding device further comprises a spiral sleeve, the spiral sleeve is connected to two ends of the horizontal connecting rod, the spiral sleeve is sleeved outside the spiral screw rod, the spiral screw rod is provided with an external thread, and the spiral sleeve is provided with an internal thread matched with the external thread. By adopting the technical scheme, the circumferential rotation of the screw rod can be converted into the change of the horizontal connecting rod along the axial position of the screw rod.

Alternatively, the screw is a bidirectional screw, i.e. opposite direction threads are provided on the same screw. By utilizing the technical scheme, when the motor drives the bidirectional spiral screw rod to rotate, the two horizontal connecting rods move in the same direction or in the opposite direction so as to increase the speed of the take-up and pay-off wire.

Optionally, the electric wire winding and unwinding device can further comprise synchronizing wheels, the synchronizing wheels are arranged on the horizontal connecting rods which are parallel to each other in a staggered mode, the synchronizing wheels are provided with limiting clamping grooves, and the charging wires are arranged in the limiting clamping grooves. Adopt above-mentioned technical scheme, the rotation of accessible synchronizing wheel reduces the frictional force of charging wire at the receipts unwrapping wire in-process to avoid the charging wire landing through spacing draw-in groove.

Optionally, the electric wire winding and unwinding device may further include an electric wire pressing roller, the electric wire pressing roller is disposed between the charging end and the rectangular wire frame and is clamped outside the charging wire, so as to control the speed of the charging wire passing through the electric wire pressing roller to be greater than or equal to the speed of the charging wire passing through the rectangular wire frame. Utilize above-mentioned technical scheme, horizontal connecting rod pulls the charging wire when can avoiding receiving the line, reduces the load of motor to the potential safety hazard that the charging wire pine takes off probably production when avoiding the unwrapping wire.

Optionally, the electric wire take-up and pay-off device may further include an electric wire guide provided at an inlet and outlet of the electric wire take-up and pay-off device. By adopting the technical scheme, the charging wire can be prevented from twisting or entering the wire winding and unwinding device in a knotting mode, so that the safety and the efficiency of winding and unwinding the wire are improved.

Optionally, the wire winding and unwinding device may further include a stopper, and the stopper is fixedly disposed on the screw rod and used for limiting displacement of the horizontal connecting rod. Adopt above-mentioned technical scheme, can come the tensioning position of injecing the charging wire and/or the position of releasing completely through the relative position of injecing horizontal connecting rod.

Optionally, the electric wire winding and unwinding device may further include a pressure pad contacting the charging wire to sense a pressure of the charging wire against the pressure pad, and the dc motor stops operating when the pressure reaches a preset maximum pressure. By adopting the technical scheme, when the pressure reaches a certain value, the driving mechanism brakes to realize automatic retraction of the charging wire.

Optionally, the electric wire winding and unwinding device may further include a current sensing device for detecting a current of the dc motor, and the dc motor is braked when the current reaches the locked-rotor current. Adopt above-mentioned technical scheme, when the complete tensioning of charging wire, direct current motor's load grow, the electric current is showing the increase, reaches the braking of locked rotor current actuating mechanism when the electric current to realize the automation of charging wire and receive and release.

The application also provides an electricity supplementing trolley which can conveniently receive and release thick cables used for charging electric automobiles, and the electricity supplementing trolley comprises the electric wire receiving and releasing device, wherein the electric wire receiving and releasing device is arranged on the side face or the top face of the electricity supplementing trolley.

The beneficial effects that the utility model provides a, can realize receiving and releasing to the automation of thick type electric wire or the great cable of bending radius, guarantee charging wire safe in utilization, avoid the charging wire to cross the potential safety hazard that the book brought, avoid the charging wire to expose the influence to public environment, public transport production in the road.

Drawings

Fig. 1 is a schematic view of an electric wire winding and unwinding device according to an embodiment of the present invention in a first state;

fig. 2 is a schematic view of an electric wire winding and unwinding device according to another embodiment of the present invention in a second state;

description of the component numbering

100 electric wire winding and unwinding devices;

10 fixing end;

20 a rectangular wire frame;

21 horizontal connecting rods comprising 21a, 21 b;

22a screw rod comprising 22a, 22 b;

23 a helical sleeve; 24 a synchronizing wheel;

30 a drive mechanism 30; 31 a direct current motor; 32 transmission gears, including 32a, 32 b; 33 synchronous belts;

40 charging wire

50 wire compression rollers;

60 a wire guide;

80 pressure sheet.

Detailed Description

The following description is provided for illustrative embodiments of the present invention, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. While the invention will be described in conjunction with the preferred embodiments, it is not intended that features of the invention be limited to only those embodiments. On the contrary, the intention of implementing the novel features described in connection with the embodiments is to cover other alternatives or modifications which may be extended based on the claims of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be practiced without these particulars. Furthermore, some of the specific details are omitted from the description so as not to obscure or obscure the present invention. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

It should be noted that in this specification, like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

As shown in fig. 1, an embodiment of the present invention discloses an electric wire winding and unwinding device 100, wherein the electric wire winding and unwinding device 100 is suitable for winding and unwinding thick electric wires or electric wires with large bending radius. The electric wire winding and unwinding device 100 at least comprises a fixed end 10, a rectangular wire frame 20 and a driving mechanism 30.

Referring to fig. 2, the fixing end 10 is used to fix the end of the charging cord 40, where the end is the other end opposite to the charging end of the charging cord 40 (the charging gun body provided with a charging port matching the electric vehicle). The opposite sides of the rectangular wire frame 20 are respectively composed of a horizontal connecting rod 21 and a screw rod 22, that is, the rectangular wire frame 20 is composed of at least a group of parallel horizontal connecting

rods

21a and 21b and a group of

parallel screw rods

22a and 22b, and the horizontal connecting rod 21 and the screw rod 22 are arranged perpendicular to each other. Preferably, the horizontal connecting rod 21 is sleeved on the screw rod 22. For the convenience of drawing, the utility model will be called 22a the first screw rod, will be called 22b the second screw rod. At least one of the horizontal connecting

rods

21a and 21b can move along the axial direction of the screw rod 22 when the screw rod 22 rotates, and the charging wire 40 is wound on the outer sides of the horizontal connecting

rods

21a and 21b, gradually tightened along with the reverse movement of the horizontal connecting

rods

21a and 21b, and gradually loosened along with the reverse movement of the horizontal connecting

rods

21a and 21 b. The driving mechanism 30 includes a dc motor 31 for driving the screw 22 to rotate.

The driving mechanism 30 further includes a transmission gear 32 and a timing belt 33, the transmission gear 32 may include a first transmission gear 32a and a second transmission gear 32b, in this embodiment, the transmission gear 32a is engaged with the first screw 22a and directly driven by the dc motor 31, the second transmission gear 32a is connected with the second screw 22b, and the first transmission gear 32a and the second transmission gear 32b are connected through the timing belt 33 for synchronously rotating the first transmission gear 32a and the second transmission gear 32 b. The horizontal

connecting rods

21a and 21b can move towards each other or reversely according to the rotation direction of the screw rod 22.

As shown in fig. 1, fig. 1 is a schematic diagram of the electric wire winding and unwinding device 100 in a first state, where the first state is a state where the charging wire 40 is completely released, when the horizontal connecting rods 21 move in opposite directions, the charging wire 40 is in a released state, the charging end can be extended for charging, when the electric wire winding and unwinding device 100 reaches the first state, the charging wire 40 is completely released, and the extended length of the charging wire 40 is the maximum; in contrast, fig. 2 shows a schematic diagram of the charging wire 40 winding and unwinding device 100 in the second state, the second state is a state in which the charging wire 40 is completely tensioned, when the horizontal connecting rods 21 move in opposite directions, the distance between a group of horizontal connecting

rods

21a and 21b becomes larger, the charging wire 40 is gradually drawn back to the rectangular wire frame 20, in this process, the charging wire 40 is in a recovery state, the charging wire 40 wound on two horizontal connecting rods 21 is gradually tensioned, until the second state is reached, the charging wire 40 is completely drawn back and tensioned on the rectangular wire frame 20.

Since a cable for charging an electric vehicle is very thick and such a charging cable is not suitable for being bent excessively or has a large bending radius, the conventional disc type winding and unwinding device is not suitable for the type of cable. In the present embodiment, the charging cord 40 is loosely wound around the horizontal connecting rod 21, is not limited to the radius of the disc, has a certain degree of freedom in bending, and can prevent damage due to the excessive folding of the cord.

Further, the charging wire 40 winding and unwinding device 100 may further include a spiral sleeve 23, and the spiral sleeve 23 is connected to two ends of the horizontal connecting rod 21 and sleeved outside the spiral screw 22. In the present embodiment, a screw sleeve is connected to each end of each horizontal connecting

rod

21a, 21 b. The connection between the screw sleeve 23 and the horizontal connecting rod 21 is not limited, and may be, for example, welding. When the screw rod 22 rotates, the screw sleeve 23 moves in the axial direction of the screw rod 22 and drives the horizontal connecting rod 21 connected with the screw rod to move, so that the circumferential rotation of the screw rod 22 can be converted into the axial movement of the horizontal connecting rod 21.

In any of the above-mentioned technical solutions, the horizontal connecting

rods

21a and 21b move in opposite directions, which means that both of them must move simultaneously, either one of the horizontal connecting

rods

21a and 21b may be fixed at a certain position, and the horizontal connecting rod fixed at the certain position cannot change its position with the rotation of the screw rod, for example, one of the horizontal connecting rods 21a may be fixed to the screw rod 22, and here, the fixing manner is not limited, and the horizontal connecting rod 21a and the

screw rods

22a and 22b may not move relatively. Two ends of the other horizontal connecting rod 21b are connected with the spiral sleeve 23, then the spiral sleeve 23 is sleeved at the position where the spiral screw 22 is threaded, and when the spiral screws 22a and 22b rotate, the horizontal connecting rod 21b can move in the axial direction of the spiral screws 22a and 22b, so that the distance between the horizontal connecting

rods

21a and 21b is changed. In this case, the screw rod 22 may be a single-direction screw rod, which is a screw rod having only one kind of thread.

In the preferred embodiment of the present application, the screw 22 is a two-way screw, i.e. two opposite-direction threads are provided on the same screw. When the direct current motor 31 drives the bidirectional screw rod to rotate, the two horizontal connecting

rods

21a and 21b move in the same direction or in the opposite direction, so as to increase the speed of the take-up and pay-off wire.

The electric wire winding and unwinding device 100 may further include a synchronizing wheel 24, and referring to any one of fig. 1 or 2, the synchronizing wheel 24 is staggered on the horizontal connecting

rods

21a, 21b parallel to each other to reduce friction of the charging wire 40 during winding and unwinding; synchronizing wheel 24 is equipped with spacing draw-in groove (not shown), and charging wire 40 is arranged in spacing draw-in groove to avoid charging wire 40 to slide off from synchronizing wheel 24.

The electric wire winding and unwinding device 100 may further include an electric wire pressing roller 50, wherein the electric wire pressing roller 50 is disposed between the charging end and the rectangular wire frame 20 and is clamped outside the charging wire 40 to control the speed of the charging wire 40 when passing through the electric wire pressing roller 50 to be greater than or equal to the speed of the charging wire 40 passing through the rectangular wire frame 20. The wire pressing roller 50 can be the wire pressing roller 50 shown in any one of fig. 1 or fig. 2, the wire pressing roller 50 enables the speed of the charging wire 40 input into or output from the rectangular wire frame 20 to be slightly greater than or equal to the linear speed of a wire on the rectangular wire frame 20, so that the wire can be prevented from being pulled by the horizontal connecting rod 21 during wire collection, the load of a motor can be reduced, and potential safety hazards caused by loosening of the charging wire 40 during wire releasing can be avoided. It should be noted that slightly larger here means that not too much, should be substantially equal to but slightly larger, if the speed of the wire pressing roller 50 passing the charging wire 40 is too fast during the releasing process of the charging wire 40, the charging wire will be pulled, on one hand, the charging wire will be damaged, on the other hand, the load of the motor will be increased, and the motor will be prone to malfunction. This technical scheme accessible changes the compression roller rotational speed and realizes, and the settlement of this kind of linear velocity relation is that technical personnel in the field easily think about, for example can be with electric wire compression roller 50 and transfer line and gear connection, the gear is connected with second drive gear 32b through the drive belt again, can control the relation of electric wire compression roller 50's rotational speed and charging wire 40 through rectangle line frame 20 linear velocity through setting up the drive ratio, because the settlement of linear velocity relation is not the utility model discloses a key point, no longer describe herein.

Further, charging wire 40 winding and unwinding devices 100 still can include wire conduit 60, sets up at the charging wire entrance and exit department of wire winding and unwinding devices 100, makes charging wire 40 be the linear charging wire 40 winding and unwinding devices 100 that goes in and out, avoids twisting or knot to improve the security and the efficiency of receiving and releasing the wire.

The utility model provides an electric wire winding and unwinding devices 100 can confirm the target position of receiving and releasing the line through following three kinds of embodiments to can brake actuating mechanism 30 when reaching the target position, these three kinds of modes are as follows:

in the first embodiment, the electric wire winding and unwinding device 100 includes a stopper (not shown) fixedly provided on the screw 22 for limiting the displacement of the horizontal connecting rod 21. For example, when the screw 22 is a unidirectional screw, one horizontal connecting rod 21a in one group of horizontal connecting rods 21 is fixed, that is, the position of the fixed horizontal connecting rod 21a is not changed all the time, and the other horizontal connecting rod 21b can move on the

screws

22a and 22b, and the distance between the

screws

21a and 21b changes during the movement. The limiters are respectively arranged at the first position and the second position of the screw rod 22, when the 21b moves to the first position, the charging wire 40 is in the first state, and when the 21b moves to the second position, the charging wire 40 is in the second state.

For another example, when the screw rod 22 is a bidirectional screw rod, the upper part and the lower part of the bidirectional screw rod are respectively provided with left-handed threads and right-handed threads, the horizontal connecting

rods

21a and 21b are respectively displaced in the threaded sections, at this time, the stoppers can be respectively arranged at the two ends and the middle part of the bidirectional screw rod, and the stopper arranged at the middle part of the bidirectional screw rod is used for limiting the first positions of the horizontal connecting

rods

21a and 21b, thereby limiting the first state of the device; the stoppers arranged at both ends of the bidirectional screw rod are used for limiting the second position of the horizontal connecting rod, thereby limiting the second state of the device.

No matter adopt one-way screw rod or two-way screw rod, when horizontal connecting rod 21 reachd the position at stopper place, horizontal connecting rod 21 can withstand the stopper, and can't take place the displacement again, and motor load can increase this moment, reaches the default when motor load, and brake actuating mechanism 30 has realized the automation of charging wire 40 promptly and has received and releases.

In the second embodiment, the electric wire winding and unwinding device 100 includes a pressure sheet 80 for sensing the pressure of the charging wire 40 on the pressure sheet 80, the charging wire 40 should fully contact the pressure sheet 80, as shown in fig. 2, the pressure sheet 80 is disposed at an inflection point, the pressure value of the charging wire 40 in the second state is preset as the maximum pressure, and when the pressure of the charging wire 40 on the pressure sheet 80 reaches the maximum pressure, the driving mechanism 30 stops operating, so as to realize the automatic winding and unwinding of the charging wire 40.

In the third embodiment, the electric wire reeling and unreeling device 100 includes a current sensing device, which is connected to the driving mechanism 30 for sensing a real-time current and sensing to the driving mechanism 30. When charging wire 40 reaches the second state, direct current motor 31's load grow, and the electric current is showing the increase, reaches the braking of stalling current drive mechanism 30 when the electric current to realize charging wire 40's automation and receive and release.

Although the above three methods for determining the target position of the take-up and pay-off line are described in the three embodiments, this does not mean that the above three methods must be used alone, and the drawings of the present application do not limit that the target position of the take-up and pay-off line can be determined in only one manner. The technical scheme can be combined for use by the technical personnel in the field, and the aim can be achieved.

The application also provides an electricity supplementing trolley which can conveniently receive and release thick cables for charging electric automobiles, the electricity supplementing trolley comprises the electric wire receiving and releasing device 100 of any one of the above embodiments, and the electric wire receiving and releasing device 100 is arranged on the side face or the top face of the electricity supplementing trolley, so that the trolley can be conveniently moved.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a more detailed description of the invention, and the specific embodiments thereof are not to be considered as limiting. Various changes in form and detail, including simple deductions or substitutions, may be made by those skilled in the art without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a wire winding and unwinding devices for moisturizing electric dolly which characterized in that includes:

the fixed end is used for fixing the tail end of the charging wire, and the tail end is the other end opposite to the charging end of the charging wire;

the opposite sides of the rectangular wire frame respectively consist of a group of horizontal connecting rods and a group of spiral screw rods, the horizontal connecting rods are sleeved on the spiral screw rods, and at least one of the horizontal connecting rods can move along the axial direction of the spiral screw rods when the spiral screw rods rotate; the charging wire is wound on the outer sides of the group of horizontal connecting rods, can be gradually tightened along with the back-to-back movement of the horizontal connecting rods, and is gradually loosened along with the opposite movement of the horizontal connecting rods;

and the driving mechanism comprises a direct current motor for driving the screw rod to rotate.

2. The electric wire winding and unwinding device according to claim 1, further comprising a transmission gear and a timing belt, wherein the transmission gear comprises a first transmission gear and a second transmission gear, the first transmission gear and the second transmission gear are respectively engaged with each screw rod, and the timing belt is connected with the first transmission gear and the second transmission gear.

3. The electric wire winding and unwinding device according to claim 1, further comprising a spiral sleeve, wherein the spiral sleeve is connected to two ends of the horizontal connecting rod and sleeved outside the spiral screw rod, the spiral screw rod is provided with an external thread, and the spiral sleeve is provided with an internal thread matched with the external thread.

4. The wire takeup and release device of claim 1, wherein the screw is a bidirectional screw.

5. The electric wire winding and unwinding device of claim 1, further comprising synchronizing wheels, wherein the synchronizing wheels are staggered on the horizontal connecting rods which are parallel to each other, the synchronizing wheels are provided with limiting clamping grooves, and charging wires are arranged in the limiting clamping grooves.

6. The electric wire winding and unwinding device of claim 1, further comprising an electric wire pressing roller disposed between the charging end and the rectangular wire frame and clamped outside the charging wire to control the speed of the charging wire passing through the electric wire pressing roller to be greater than or equal to the speed of the charging wire passing through the rectangular wire frame.

7. The wire takeup and release device of claim 1, further comprising a wire guide disposed at an entrance and exit of the charging wire takeup and release device.

8. The electric wire winding and unwinding device of claim 1, further comprising a stopper fixedly disposed on the screw for limiting displacement of the horizontal connecting rod.

9. The electric wire winding and unwinding device according to claim 1, further comprising a pressure pad contacting the charging wire to sense a pressure of the charging wire against the pressure pad, wherein the dc motor stops when the pressure reaches a preset maximum pressure.

10. The electrical cord retracting device according to claim 1, further comprising a current sensing device for sensing a current of said dc motor, said dc motor being braked when said current reaches a locked rotor current.

11. An electricity supplementing trolley is characterized by comprising the electric wire winding and unwinding device as claimed in any one of claims 1-10, wherein the electric wire winding and unwinding device is arranged on the side face or the top face of the electricity supplementing trolley.