Pantograph limit sensing device

Abstract

A pantograph limit sensing device includes: a motor connector, a movable slider, a spring, a positioning column, and a connecting shaft which are sequentially installed with the motor connector; wherein a cylinder is provided at one end of the motor connector; and a second position sensor is installed, and the second position sensor is connected to the control circuit of the pantograph; the movable slider is installed in the motor connector, and a guide ring is mounted on the movable slider; the small end of the connecting shaft is connected to a linear motion mechanism, and the linear motion mechanism is connected to a linkage transmission mechanism; and a first position sensor is installed on the side of the linear motion mechanism; the second position sensor and the first position sensor which are respectively provided are used to accurately detect the lifting position of the pantograph bow head and determine whether the bow head is lifted in place. The present invention can not only accurately detect whether the pantograph bow head and the vehicle-mounted collector maintain good contact, but also solve the problem of the motor being damaged due to the instantaneous increase of current when the bow head and the collector are crimped.

Description

Technical Field

[0001] The invention belongs to the field of electric power engineering charging, and in particular relates to a pantograph limit sensing device. Background Art

[0002] At present, with the development of the electric vehicle industry, public charging infrastructure has made great progress. As a result, high-power charging "pantographs" (i.e., power receiving mode) have gradually come into people's view, and the power receiving mode will become an emerging charging mode that breaks the traditional charging mode. However, since most of the "pantographs" currently use the bow-dropping type to receive electricity, there may be many different distances between the on-board collector and the ground, and the bow head of the "pantograph" cannot be adaptively matched with the on-board collectors at different heights; and since the position of the raising and lowering of the pantograph cannot be accurately judged, it is easy to cause the bow head of the "pantograph" and the on-board collector to deviate from the downward pressure position, resulting in poor contact or excessive lowering of the pantograph due to the instantaneous increase of current when the bow head and the collector are crimped, resulting in device damage. At the same time, the pantograph bow head and the on-board collector are not firmly connected, which is easy to cause safety hazards such as ignition and arcing. Summary of the invention

[0003] The purpose of the present invention is to provide a pantograph limit sensing device to solve the technical problem of accurately detecting whether the pantograph head and the vehicle-mounted current collector maintain good contact and protecting the motor from damage caused by the instantaneous increase of current when the pantograph head and the current collector are crimped.

[0004] To achieve the above purpose, the specific technical solution of the pantograph limit sensing device of the present invention is as follows:

[0005] A pantograph limit sensing device is provided with: a sensing device, which includes: a motor connector, a movable slider installed in sequence with the motor connector, a disc-shaped spring, a positioning column, and a connecting shaft; wherein:

[0006] A cylinder with an inner hole is arranged in parallel at one end of the motor connector, and a bolt and nut pair is installed at the other end of the motor connector; and a mounting hole for the sensor bracket to pass through is arranged oppositely on the motor connector, and a second position sensor is installed in the mounting hole, and the second position sensor is connected to the control circuit of the pantograph;

[0007] The movable slider is installed in the cylindrical inner hole of the motor connector. A plurality of grooves are arranged at a certain interval on the large end cylinder of the movable slider, and guide rings are correspondingly installed in the slots of the plurality of grooves.

[0008] The side section of the connecting shaft is a stepped shaft structure opposite to the positioning column; the small end of the connecting shaft is connected to the linear motion mechanism, and the linear motion mechanism is connected side by side with the linkage transmission mechanism; and a first position sensor is installed on the side position of the linear motion mechanism; a second position sensor is respectively arranged at the sensor bracket and a first position sensor at the linear motion mechanism, so as to accurately detect the lifting and lowering position of the bow head of the pantograph and determine whether the bow head is lifted and lowered into place.

[0009] Furthermore, the appearance of the motor connector is an inverted П-shaped structure, one end of the inverted П-shaped structure is parallel to a cylinder with an inner hole, the tail end of the inverted П-shaped structure is oppositely provided with a through hole for a bolt and nut pair, and the bolt and nut pair are installed in the hole; the head end of the inverted П-shaped structure is oppositely provided with an installation hole for a sensor bracket to pass through.

[0010] Furthermore, the sensor bracket is a П-shaped structure opposite to the motor connector; wherein a second position sensor is installed in the upper mounting hole, and the lower mounting hole is connected to the motor connector.

[0011] Furthermore, the side cross-section of the movable slider is a ┝-shaped stepped shaft, and is installed in the cylindrical inner hole of the motor connector through a gasket and a retaining ring; and the stepped shaft structure of the movable slider gradually becomes smaller; the gasket and the guide ring are made of polytetrafluoroethylene material.

[0012] Furthermore, the side cross-section of the positioning column is a ┝-shaped structure.

[0013] Furthermore, the second position sensor is an inductive sensor; when the push rod in the linear motion mechanism is subjected to load force to cause the deformation of the disc-shaped spring piece to become zero, the second position sensor transmits an induction signal to the control circuit of the pantograph, and the control circuit of the pantograph controls the transmission to stop, so as to lower the pantograph into place.

[0014] Furthermore, the linear motion mechanism is made of metal material, and has several slots on the side for installing the first position sensor; the linear motion mechanism is a mechanism with built-in transmission gears, high-efficiency ball screws, and static load braking brakes; the first position sensor is installed on the linear motion mechanism, and the first position sensor is installed on the side of the linear motion mechanism.

[0015] Furthermore, the linkage transmission mechanism is equipped with a drive controller; when the gears in the linkage transmission mechanism rotate forward, the forward rotation of the gears is transmitted to the high-efficiency ball screw of the linear motion mechanism, and the high-efficiency ball screw rotates to push the linear push rod forward. Under the reaction of the force, the movable slider compresses the deformation of the disc-shaped spring piece to zero, and the second position sensor receives the signal and transmits the obtained signal to the drive controller. At this time, the linkage transmission mechanism stops rotating, and the bow is lowered into place; when the gears in the linkage transmission mechanism rotate reversely, the reverse rotation of the gears is transmitted to the high-efficiency ball screw of the linear motion mechanism, and the high-efficiency ball screw rotates to pull the linear push rod of the linear motion mechanism backward. When the linear push rod retracts to the first position sensor, the first position sensor receives the signal and transmits the obtained signal to the drive controller. At this time, the linkage transmission mechanism stops rotating, and the bow is raised into place.

[0016] Furthermore, the first position sensor is an inductive sensor. When the push rod in the linear motion mechanism reaches the first position sensor, the first position sensor transmits the sensing signal to the pantograph control circuit, and the pantograph control circuit controls the transmission to stop, so as to realize the pantograph raising control.

[0017] The pantograph limit sensing device of the present invention has the following advantages:

[0018] (1) The present invention uses a push rod to change the deformation amount of the disc-shaped spring piece, accurately judging whether the pantograph head and the vehicle-mounted current collector maintain good contact, and effectively ensuring the safety of electricity use.

[0019] (2) The present invention can increase or decrease the deformation of the disc-shaped spring piece according to the actual load requirements, thereby reducing the risk of the motor burning due to excessive instantaneous current.

[0020] ⑶ The present invention only needs to set the position of the sensor once, and can adaptively match the height of different vehicle collectors, thereby improving production efficiency and reducing labor costs.

[0021] (4) The present invention avoids the potential safety hazards such as sparking and arcing caused by the tight overlap between the pantograph head and the vehicle-mounted current collector. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an exploded schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the bow raising and resetting state of the present invention;

[0025] Figure 4 It is a schematic diagram of the installation position of the present invention;

[0026] Figure 5 It is a schematic diagram of the bow lowering state of the present invention.

[0027] Description of the markings in the figure:

[0028] 1. Base; 2. Sensing device; 3. Bow head assembly; 4. Lifting arm; 5. Support rod; 201. Linkage transmission mechanism; 202. Linear motion mechanism; 203. Motor connector; 204. Movable slider; 205. First position sensor; 206. Second position sensor; 207. Disc-shaped spring; 208. Guide ring; 209. Sensor bracket; 210. Connecting shaft; 211. Positioning column; 212. Gasket; 213. Retaining spring. DETAILED DESCRIPTION

[0029] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings.

[0030] like Figures 1 to 5 As shown, the present invention is provided with: an induction device 2, which includes: a motor connector 203, a movable slider 204 sequentially installed with the motor connector 203, a disc-shaped spring 207, a positioning column 211, and a connecting shaft 210; wherein,

[0031] The appearance of the motor connector 203 is an inverted П-shaped structure, one end of the inverted П-shaped structure is parallelly provided with a cylinder with an inner hole, the end of the inverted П-shaped structure is oppositely provided with a through hole for a bolt and nut pair, and the bolt and nut pair are installed in the hole; the head end of the inverted П-shaped structure is oppositely provided with a mounting hole for a sensor bracket 209 to pass through, wherein the second position sensor 206 is installed in the upper mounting hole; the second position sensor 206 is connected to the control circuit of the pantograph; the lower mounting hole is connected to the motor connector 203;

[0032] The side cross-section of the movable slider 204 is a ┝-shaped stepped shaft, and is installed in the cylindrical inner hole of the motor connector 203 through a gasket 212 and a retaining ring 213. Several grooves are provided on the large end cylinder of the movable slider 204 at a certain interval, and guide rings 208 are correspondingly installed in the grooves of the several grooves; and the stepped shaft structure of the movable slider 204 gradually becomes smaller.

[0033] The sensor bracket 209 is a П-shaped structure opposite to the motor connector 203 .

[0034] The gasket 212 and the guide ring 208 are made of polytetrafluoroethylene material; the disc-shaped spring piece 207 is made of spring steel material.

[0035] The side cross-section of the positioning column 211 is a ┝-shaped structure.

[0036] The side section of the connecting shaft 210 is a stepped shaft structure opposite to the positioning column 211; and the stepped shaft structure of the connecting shaft 210 gradually becomes smaller; the small end of the stepped shaft of the connecting shaft 210 is connected to the linear motion mechanism 202, and the linear motion mechanism 202 is connected side by side with the linkage transmission mechanism 201.

[0037] The above-mentioned second position sensor 206 uses an inductive sensor as a stroke position sensor; when the push rod in the linear motion mechanism 202 is subjected to load force to make the deformation of the disc-shaped spring piece 207 become zero, the second position sensor 206 transmits the induction signal to the control circuit of the pantograph, and the control circuit of the pantograph controls the transmission to stop, so as to realize the control of lowering the pantograph into place.

[0038] The above-mentioned linear motion mechanism 202 is an existing mechanism with built-in transmission gears, high-efficiency ball screws, and static load braking brakes; a first position sensor 205 is installed on the linear motion mechanism 202, and the first position sensor 205 is installed on the side position of the linear motion mechanism 202; the first position sensor 205 is connected to the drive controller in the linear motion mechanism 202.

[0039] The above-mentioned linkage transmission mechanism 201 is equipped with a drive controller composed of a J1939CAN bus, an open-loop speed controller and a DC motor composed of multiple gear sets; when the gears in the linkage transmission mechanism 201 rotate forward, the positive rotation of the gears is transmitted to the high-efficiency ball screw of the linear motion mechanism 202, and the rotation of the high-efficiency ball screw pushes the linear push rod forward. Under the reaction of the force, the movable slider 204 compresses the deformation of the disc-shaped spring piece 207 to zero, and the second position sensor 206 receives the signal and transmits the obtained signal to the drive controller. At this time, the linkage transmission mechanism 201 stops rotating and the bow is lowered into place.

[0040] When the gears in the linkage transmission mechanism 201 rotate in the opposite direction, the gears rotate in the opposite direction and transmit the rotation to the high-efficiency ball screw of the linear motion mechanism 202. The high-efficiency ball screw rotates to pull the linear push rod of the linear motion mechanism 202 backward. When the linear push rod retracts to the first position sensor 205, the first position sensor 205 receives a signal and transmits the obtained signal to the drive controller. At this time, the linkage transmission mechanism 201 stops rotating and the bow is raised to the position.

[0041] The linear motion mechanism 202 is made of metal material, and has a plurality of grooves (two in this embodiment) on the side thereof for fixing and installing the first position sensor 205 .

[0042] The first position sensor 205 is an inductive sensor. When the push rod in the linear motion mechanism 202 reaches the first position sensor 205, the first position sensor 205 transmits the sensing signal to the pantograph control circuit, which controls the pantograph control circuit to stop transmission to achieve pantograph raising control.

[0043] The present invention respectively arranges a second position sensor 206 at the sensing device 209 and a first position sensor 205 at the linear motion mechanism 202 to accurately detect the lifting position of the pantograph head and determine whether the pantograph head is lifted or lowered into place.

[0044] The specific technical steps for implementation are:

[0045] 1. Insert the guide rings 208 into the corresponding slots of the movable sliders 204;

[0046] 2. Insert the disc-shaped spring piece 207 into the positioning column 211, and install the positioning column 211 into the inner cavity of the connecting shaft 210;

[0047] 3. Install the movable slider 204 into the inner cavity of the connecting shaft 210, and install the retaining ring 213 into the retaining ring groove of the connecting shaft 210 to limit it.

[0048] 4. Install the second position sensor 206 into the sensor bracket 209 and fix it on the motor connector 203;

[0049] 5. Connect the external thread of the connecting shaft 210 to the push rod of the linear motion mechanism 202.

[0050] When in use, both ends of the induction device 2 are mounted on the base 1, one end of the base 1 is fixed on the support rod 5; the support rod 5 is pivotally connected to the lifting arm 4, and the lifting arm 4 is mounted on the bow head assembly 3.

[0051] A lifting support is also installed between the base 1 and the lifting arm 4. The second position sensor 206 and the first position sensor 205 respectively arranged at the sensor bracket 209 and the linear motion mechanism 202 are used to accurately detect the lifting position of the pantograph head and determine whether the pantograph head is lifted and lowered in place.

[0052] The above-mentioned base; bow head assembly; lifting arm; support rod; linkage transmission mechanism; linear motion mechanism; sensor are existing technologies, and the technologies not described are existing technologies and will not be described in detail.

[0053] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A pantograph limit sensing device, characterized in that: The induction device is provided, and the induction device includes a motor connector, a movable slider installed in sequence with the motor connector, a disc-shaped spring, a positioning column, and a connecting shaft; wherein, A cylinder with an inner hole is arranged in parallel at one end of the motor connector, and a bolt and nut pair is installed at the other end of the motor connector; and a mounting hole for the sensor bracket to pass through is arranged oppositely on the motor connector, and a second position sensor is installed in the mounting hole, and the second position sensor is connected to the control circuit of the pantograph; The movable slider is installed in the cylindrical inner hole of the motor connector. A plurality of grooves are arranged at a certain interval on the large end cylinder of the movable slider, and guide rings are correspondingly installed in the slots of the plurality of grooves. The side section of the connecting shaft is a stepped shaft structure opposite to the positioning column; the small end of the connecting shaft is connected to the linear motion mechanism, and the linear motion mechanism is connected side by side with the linkage transmission mechanism; and a first position sensor is installed on the side position of the linear motion mechanism; the second position sensor respectively arranged at the sensor bracket and the first position sensor at the linear motion mechanism are used to accurately detect the lifting position of the pantograph head and determine whether the pantograph head is lifted or lowered in place; The second position sensor is an inductive sensor; when the push rod in the linear motion mechanism is subjected to load force to make the deformation of the disc-shaped spring piece zero, the second position sensor transmits the induction signal to the control circuit of the pantograph, and the control circuit of the pantograph controls the transmission to stop, so as to achieve the pantograph lowering in place; The linear motion mechanism is made of metal material, and has several slots on the side for installing the first position sensor; the linear motion mechanism is a mechanism with built-in transmission gears, high-efficiency ball screws, and static load braking brakes; the first position sensor is installed on the linear motion mechanism, and the first position sensor is installed on the side of the linear motion mechanism.

2. The pantograph limit sensing device according to claim 1, characterized in that: The shape of the motor connector is an inverted П-shaped structure, one end of the inverted П-shaped structure is parallel to a cylinder with an inner hole, the tail end of the inverted П-shaped structure is oppositely provided with a through hole for a bolt and nut pair, and the bolt and nut pair are installed in the hole; the head end of the inverted П-shaped structure is oppositely provided with an installation hole for a sensor bracket to pass through.

3. The pantograph limit sensing device according to claim 1 or 2, characterized in that: The sensor bracket is a П-shaped structure opposite to the motor connector; wherein the second position sensor is installed in the upper mounting hole, and the lower mounting hole is connected to the motor connector.

4. The pantograph limit sensing device according to claim 1, characterized in that: The side section of the movable slider is a ┝-shaped stepped shaft, and is installed in the cylindrical inner hole of the motor connector through a gasket and a retaining ring; and the stepped shaft structure of the movable slider gradually becomes smaller; the gasket and the guide ring are made of polytetrafluoroethylene material.

5. The pantograph limit sensing device according to claim 1, characterized in that: The side section of the positioning column is a ┝-shaped structure.

6. The pantograph limit sensing device according to claim 1, characterized in that: The linkage transmission mechanism is equipped with a drive controller; when the gears in the linkage transmission mechanism rotate forward, the forward rotation of the gears is transmitted to the high-efficiency ball screw of the linear motion mechanism, and the high-efficiency ball screw rotates to push the linear push rod forward. Under the reaction of the force, the movable slider compresses the deformation of the disc-shaped spring piece to zero, and the second position sensor receives the signal and transmits the obtained signal to the drive controller. At this time, the linkage transmission mechanism stops rotating, and the bow is lowered to the position; when the gears in the linkage transmission mechanism rotate reversely, the reverse rotation of the gears is transmitted to the high-efficiency ball screw of the linear motion mechanism, and the high-efficiency ball screw rotates to pull the linear push rod of the linear motion mechanism to retract backward. When the linear push rod retracts to the first position sensor, the first position sensor receives the signal and transmits the obtained signal to the drive controller. At this time, the linkage transmission mechanism stops rotating, and the bow is raised to the position.

7. The pantograph limit sensing device according to claim 1, characterized in that: The first position sensor is an inductive sensor. When the push rod in the linear motion mechanism reaches the first position sensor, the first position sensor transmits the sensing signal to the pantograph control circuit, and the pantograph control circuit controls the transmission to stop, so as to realize the pantograph raising control.

Images