Pantograph driving device and pantograph testing equipment

Abstract

The utility model belongs to the field of pantograph performance testing, and particularly relates to a pantograph driving device and pantograph testing equipment. A movable frame is arranged on one side of a winding reel, a sliding rod parallel to the winding reel is arranged on the movable frame, a movable wheel set is arranged on the sliding rod in a sliding mode, and a fixed wheel set is installed on a support; the movable end of the traction rope sequentially penetrates through the first guide channel in the movable wheel set and the second guide channel in the fixed wheel set and then is led out. During use, the movable end of the traction rope is connected with a pantograph, the winding reel is driven by the driving motor to rotate at a constant speed so as to wind or release the traction rope, and in the winding and unwinding process of the traction rope, the movable wheel set slides on the sliding rod so as to play a role in guiding and arranging the traction rope; the axes of the two second grooved wheels in the fixed wheel set are static relative to the support, so that the traction rope does not swing left and right in the retracting and releasing process, and the stability of the pantograph in the lifting process and the accuracy of numerical values detected by the tension sensor are improved.

Description

Technical Field

[0001] The present application relates to the technical field of pantograph performance testing, and in particular to a pantograph driving device and a pantograph testing device. Background Art

[0002] The pantograph, mounted on the roof of a locomotive or EMU, is a critical current-collecting component for the normal operation of rail vehicles. Most domestic rail vehicles use single-arm pantographs, which offer reliable performance and easy maintenance. To ensure proper operation, the pantograph requires regular maintenance. In addition to replacing worn parts, greasing joints, and inspecting the condition of various components, maintenance also requires checking that the pantograph's characteristic parameters meet requirements. If necessary, the pantograph may need to be disassembled, inspected, and tested. Therefore, pantograph testing is particularly crucial for ensuring proper operation.

[0003] The detection of pantograph characteristic parameters mainly includes the detection of the height of the pantograph and the detection of the static pressure of the pantograph. Traditional detection mainly relies on manual handheld force measuring devices, which are labor-intensive, the pulling process is unstable, and the measurement results have large errors. To solve the problems existing in the above-mentioned manual testing, some pantograph drive devices have also appeared. They use a motor to drive the winding wheel to reel in and release the wire rope to drive the pantograph to rise and fall. At the same time, a tension sensor is set on the wire rope to test the static contact force of the pantograph. Because the winding wheel has a certain axial length, the wire rope will swing left and right during the process of winding and releasing on the winding wheel, thereby affecting the stability of the pantograph raising and lowering process and the detection value of the tension sensor. Utility Model Content

[0004] The embodiments of the present application provide a pantograph drive device and a pantograph testing device, which aim to improve the stability of the pantograph raising and lowering process and the accuracy of the tension sensor detection value.

[0005] To this end, according to one aspect of the present application, a pantograph driving device is provided, comprising:

[0006] Bracket;

[0007] A winding assembly, comprising a winding drum rotatably arranged on the bracket and a driving motor for driving the winding drum to rotate;

[0008] a traction rope, wound on the winding drum;

[0009] A movable frame is located on one side of the winding drum, and a sliding rod is provided on the movable frame, wherein the axis of the sliding rod is parallel to the axis of the winding drum;

[0010] A moving wheel assembly includes a sliding seat slidably disposed on the sliding rod and two first sheaves rotatably disposed on the sliding seat, wherein the axes of the two first sheaves are parallel and perpendicular to the axis of the winding drum, and the grooves of the two first sheaves cooperate to form a first guide channel;

[0011] a fixed wheel assembly mounted on the bracket, the fixed wheel assembly comprising two second sheaves, the axes of the two second sheaves being parallel, and the grooves of the two second sheaves cooperating to form a second guide channel; the movable end of the traction rope sequentially passes through the first guide channel and the second guide channel and is then led outward; and

[0012] A tension sensor is connected between the bracket and a side of the movable frame facing away from the winding drum, and the tension sensor is used to detect the tension applied by the traction rope to the movable frame through the driving wheel group.

[0013] Optionally, a spiral winding groove is provided on the winding drum along the axial direction, and the winding groove is used to wind the traction rope.

[0014] Optionally, the pantograph drive device also includes a guide wheel, a support arm extending toward the winding drum is provided on the sliding seat, the guide wheel is rotatably provided on the support arm, the axis of the guide wheel is parallel to the axis of the winding drum, and the outer wall of the guide wheel is circumferentially provided with an annular protrusion, and the annular protrusion is embedded in the winding groove.

[0015] Optionally, the two first sheaves and the two second sheaves each include two sheaves with different diameters, one large and one small.

[0016] Optionally, the drive motor is mounted on the bracket and located inside the winding drum, and the drive motor is connected to the winding drum via a transmission mechanism.

[0017] Optionally, the bracket includes two parallel and spaced-apart vertical plates and a plurality of connecting rods connected between the two vertical plates, the winding drum is rotatably set between one end of the two vertical plates, and the other ends of the two vertical plates are connected by a connecting plate, the tension sensor is set on the connecting plate, the movable frame is located between the winding drum and the connecting plate, and the sensing end of the tension sensor is connected to the movable frame.

[0018] Optionally, the movable frame has a rotating end and a free end that are relatively arranged, the rotating end is rotatably connected to the bracket through a rotating member, the sliding rod is arranged close to the free end, and the tension sensor is connected between the bracket and the free end of the movable frame.

[0019] Optionally, the fixed wheel assembly further includes a mounting seat, the two second sheaves are rotatably disposed on the mounting seat, and the mounting seat is mounted on the bracket.

[0020] Optionally, the pantograph driving device further includes an encoder, which is arranged on the motor shaft of the driving motor and is used to detect the number of revolutions of the motor shaft of the driving motor.

[0021] According to another aspect of the present application, a pantograph testing device is provided, comprising the pantograph driving device as described above.

[0022] The pantograph driving device and pantograph testing equipment provided by the present application have the following beneficial effects: compared with the prior art, the pantograph driving device of the present application sets a movable frame on one side of the winding drum, and sets a sliding rod parallel to the winding drum on the movable frame, slides the moving wheel group on the sliding rod, and installs the fixed wheel group on the bracket, and the movable end of the traction rope passes through the first guide channel on the moving wheel group and the second guide channel on the fixed wheel group in turn and is led outward. When in use, the movable end of the traction rope is connected to the pantograph, and the winding drum rotates under the drive of the driving motor to reel in or release the traction rope. During the process of reeling in and releasing the traction rope, the moving wheel group slides on the sliding rod to guide and arrange the traction rope. Since the fixed wheel group is installed on the bracket, the axes of the two second groove wheels of the fixed wheel group are stationary relative to the bracket. Therefore, the traction rope will not swing left and right during the process of reeling in and releasing, thereby improving the stability of the pantograph lifting process and the accuracy of the detection value of the tension sensor, making the test results of the pantograph testing equipment more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] in:

[0025] Figure 1 1 is a schematic diagram of the overall structure of a pantograph drive device according to an embodiment of the present application;

[0026] Figure 2 yes Figure 1 A top view of the pantograph drive device shown;

[0027] Figure 3 yes Figure 2 The AA-direction cross-sectional view;

[0028] Figure 41 is a schematic diagram of the connection structure between the movable frame and the moving wheel assembly in the pantograph drive device according to one embodiment of the present application;

[0029] Figure 5 yes Figure 4 a schematic diagram of another perspective of the structure shown;

[0030] Figure 6 It is a structural schematic diagram of a fixed wheel group in a pantograph drive device shown in one embodiment of the present application.

[0031] Description of main component symbols:

[0032] 100, bracket; 110, vertical plate; 120, connecting rod; 130, connecting plate;

[0033] 200, winding assembly; 210, winding drum; 211, winding groove; 220, driving motor; 230, transmission mechanism;

[0034] 300, traction rope;

[0035] 400, movable frame; 401, rotating end; 402, free end; 410, sliding rod;

[0036] 500, driving wheel assembly; 510, sliding seat; 511, support arm; 520, first sheave; 530, guide wheel; 531, annular protrusion;

[0037] 600, fixed wheel assembly; 610, mounting seat; 611, threaded hole; 620, second sheave;

[0038] 700. Tensile sensor. DETAILED DESCRIPTION

[0039] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present application. However, the present application may be implemented in many other forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present application.

[0040] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0041] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0044] It should also be noted that, in the embodiments of the present application, the same figure mark represents the same component or the same part. For the same parts in the embodiments of the present application, the figure may only mark one of the parts or components as an example. It should be understood that the figure mark also applies to other identical parts or components.

[0045] According to one aspect of the present application, an embodiment of the present application provides a pantograph driving device, such as Figure 1-Figure 2 As shown, the pantograph driving device includes a bracket 100 , a winding assembly 200 , a traction rope 300 , a movable frame 400 , a moving wheel group 500 , a fixed wheel group 600 and a tension sensor 700 .

[0046] The winding assembly 200 includes a bobbin 210 rotatably mounted on a bracket 100 and a drive motor 220 for driving the bobbin 210 to rotate. A traction rope 300 is wound around the bobbin 210. A movable frame 400 is located on one side of the bobbin 210. A slide rod 410 is disposed on the movable frame 400, and the axis of the slide rod 410 is parallel to the axis of the bobbin 210. The moving wheel assembly 500 includes a sliding seat 510 slidably mounted on the slide rod 410 and two first sheaves 520 rotatably mounted on the sliding seat 510. The axes of the two first sheaves 520 are parallel and perpendicular to the axis of the bobbin 210, and the grooves of the two first sheaves 520 cooperate to form a first guide channel. A fixed wheel assembly 600 is mounted on the bracket 100 and includes two second sheaves 620. The axes of the two second sheaves 620 are parallel, and the grooves of the two second sheaves 620 cooperate to form a second guide channel. The movable end of the traction rope 300 passes through the first and second guide channels in sequence before being led outward. A tension sensor 700 is connected between the bracket 100 and the side of the movable frame 400 facing away from the winding drum 210. The tension sensor 700 is used to detect the tension applied by the traction rope 300 to the movable frame 400 via the driving wheel assembly 500.

[0047] The traction rope 300 can be a steel wire rope with a hook mounted on the movable end of the wire rope for easy connection to the pantograph. The length of the sliding rod 410 is greater than or equal to the length of the winding drum 210, allowing the driving wheel assembly 500 to move on the sliding rod 410 along the entire length of the winding drum 210.

[0048] In the embodiment of the present application, the pantograph drive device comprises a movable frame 400 disposed on one side of the bobbin 210, a slide bar 410 parallel to the bobbin 210 disposed on the movable frame 400, a moving wheel assembly 500 slidably disposed on the slide bar 410, and a fixed wheel assembly 600 mounted on the bracket 100. The movable end of the traction rope 300 passes through a first guide channel on the moving wheel assembly 500 and a second guide channel on the fixed wheel assembly 600 and then is led outward. During use, the movable end of the traction rope 300 is connected to the pantograph, and the bobbin 210 rotates at a constant speed under the drive motor 220, winding or releasing the traction rope 300 at a constant speed. During this process, due to the principle of force balance, the static contact force exerted on the traction rope 300 between the pantograph and the bobbin 210 is transmitted to the movable frame 400 through the moving wheel assembly 500 and detected by the tension sensor 700. During the process of retracting and extending the traction rope 300, the moving wheel group 500 slides on the slide bar 410, guiding and arranging the traction rope 300. Since the fixed wheel group 600 is installed on the bracket 100, the axes of the two second groove wheels 620 in the fixed wheel group 600 are stationary relative to the bracket 100. Therefore, the traction rope 300 will not swing left and right during the process of retraction and extension, thereby improving the stability of the pantograph raising and lowering process and the accuracy of the detection value of the tension sensor 700.

[0049] In one embodiment, if Figure 2-Figure 3 As shown, a spiral winding groove 211 is provided on the winding drum 210 along the axial direction, and the winding groove 211 is used to wind the traction rope 300. Specifically, the winding groove 211 has the number of turns required to fully wind the traction rope 300.

[0050] The pantograph drive device also includes a guide wheel 530. A support arm 511 extending toward the winding drum 210 is provided on the sliding seat 510. The guide wheel 530 is rotatably provided on the support arm 511. The axis of the guide wheel 530 is parallel to the axis of the winding drum 210. The outer wall of the guide wheel 530 is circumferentially provided with an annular protrusion 531, and the annular protrusion 531 is embedded in the winding groove 211.

[0051] Through the above arrangement, when the winding drum 210 rotates, the annular protrusion 531 on the guide wheel 530 cooperates with the winding groove 211 on the winding drum 210, driving the sliding seat 510 to move on the slide rod 410, so that the moving wheel group 500 moves to the corresponding winding groove 211 on the winding drum 210 to release or reel in the traction rope 300, thereby better retracting and releasing the traction rope 300.

[0052] In one embodiment, if Figure 1-Figure 2 and Figure 4-Figure 5 As shown, the two first sheaves 520 and the two second sheaves 620 each include two sheaves of different diameters, one large and one small. This design can reduce the volume of the entire moving wheel assembly 500 and the fixed wheel assembly 600, which is conducive to the miniaturization design of the entire pantograph drive device.

[0053] In one embodiment, if Figure 1-Figure 3 As shown, the driving motor 220 is installed on the bracket 100 and is located inside the winding drum 210 . The driving motor 220 is connected to the winding drum 210 through a transmission mechanism 230 .

[0054] The interior of the bobbin 210 is used to accommodate the driving motor 220, which saves space and is also conducive to the miniaturization design of the entire pantograph driving device.

[0055] In one implementation, the transmission mechanism 230 may adopt a gear transmission, including a driving gear and an inner ring gear. The driving gear is fixed on the motor shaft of the drive motor 220, and the inner ring gear is fixed on the inner wall of the winding drum 210 and meshes with the driving gear. The drive motor 220 drives the winding drum 210 to rotate through the mutually meshing gears and the inner ring gear to realize the winding and releasing of the traction rope 300. The drive motor 220 may adopt a reduction motor that can rotate forward and reverse.

[0056] In another embodiment, the drive motor 220 is directly connected to the bobbin 210, eliminating the need for a transmission mechanism 230. Specifically, the main body of the drive motor 220 is mounted on the bracket 100, and the motor shaft of the drive motor 220 is connected to a fixing plate. This fixing plate is fixed to the bobbin 210 via countersunk screws. Two bearings symmetrically arranged between the main body of the drive motor 220 and the bobbin 210 provide rotational support. With this design, the main body of the drive motor 220 is fixed, and the motor shaft drives the bobbin 210 to rotate.

[0057] In one embodiment, if Figure 1-Figure 2 As shown, the bracket 100 includes two parallel and spaced-apart vertical plates 110 and a plurality of connecting rods 120 connected between the two vertical plates 110. The winding drum 210 is rotatably arranged between one end of the two vertical plates 110. The other ends of the two vertical plates 110 are connected by a connecting plate 130. The tension sensor 700 is arranged on the connecting plate 130. The movable frame 400 is located between the winding drum 210 and the connecting plate 130. The sensing end of the tension sensor 700 is connected to the movable frame 400.

[0058] Recombination Figure 4 The movable frame 400 has a rotating end 401 and a free end 402 arranged opposite to each other. The rotating end 401 is rotatably connected to the bracket 100 through a rotating member (such as a rotating shaft). The sliding rod 410 is arranged near the free end 402, and the tension sensor 700 is connected between the bracket 100 and the free end 402 of the movable frame 400.

[0059] In a specific embodiment, Figure 2 and Figure 6 As shown, the fixed wheel assembly 600 further includes a mounting base 610, on which two second sheaves 620 are rotatably mounted, and the mounting base 610 is mounted on the bracket 100. The mounting base 610 not only serves as a mounting carrier for the two second sheaves 620, but also can be used to externally mount the entire fixed wheel assembly 600. Specifically, the mounting base 610 is provided with a threaded hole 611, and the mounting base 610 can be mounted to the bracket 100 by screws engaging with the threaded hole 611.

[0060] In some embodiments, the pantograph driving device further includes an encoder (not shown in the figure), which is disposed on the motor shaft of the driving motor 220 and is used to detect the number of revolutions of the motor shaft of the driving motor 220 .

[0061] The number of revolutions of the motor shaft of the driving motor 220 is detected by an encoder, and the lifting distance of the traction rope 300 can be obtained by multiplying the number of revolutions by the circumference of the winding drum 210, thereby realizing the detection of the height of the lifting bow.

[0062] According to another aspect of the present application, an embodiment of the present application further provides a pantograph testing device, comprising a pantograph test bench and the pantograph drive device of any of the aforementioned embodiments. The pantograph test bench provides a power control system and an auxiliary detection system, which controls the uniform forward and reverse rotation of the drive motor. The pantograph testing device can be used to test the characteristic parameters of the pantograph. Due to the use of the pantograph drive device of the aforementioned embodiments, the pantograph's raising and lowering process during testing is more stable, and the values ​​detected by the tension sensor are more accurate, making the test results of the pantograph testing device more reliable.

[0063] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The above embodiments merely illustrate several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A pantograph driving device, characterized in that: include: Bracket; A winding assembly, comprising a winding drum rotatably arranged on the bracket and a driving motor for driving the winding drum to rotate; A traction rope, wound on the winding drum; A movable frame is located at one side of the winding drum, and a sliding rod is arranged on the movable frame, and the axis of the sliding rod is parallel to the axis of the winding drum; A moving wheel assembly, comprising a sliding seat slidably arranged on the sliding rod and two first groove wheels rotatably arranged on the sliding seat, wherein the axes of the two first groove wheels are parallel and perpendicular to the axis of the winding drum, and the grooves of the two first groove wheels cooperate to form a first guide channel; A fixed wheel group is installed on the bracket, and the fixed wheel group has two second groove wheels, the axes of the two second groove wheels are parallel, and the grooves of the two second groove wheels cooperate to form a second guide channel; the movable end of the traction rope passes through the first guide channel and the second guide channel in sequence and then leads out; as well as A tension sensor is connected between the bracket and a side of the movable frame away from the winding drum, and the tension sensor is used to detect the tension applied by the traction rope to the movable frame through the driving wheel group.

2. The pantograph driving device according to claim 1, characterized in that: The winding drum is provided with a spiral winding groove along the axial direction, and the winding groove is used for winding the traction rope.

3. The pantograph driving device according to claim 2, characterized in that: The pantograph driving device also includes a guide wheel, a support arm extending toward the winding drum is provided on the sliding seat, the guide wheel is rotatably provided on the support arm, the axis of the guide wheel is parallel to the axis of the winding drum, and an annular protrusion is circumferentially provided on the outer wall of the guide wheel, and the annular protrusion is embedded in the winding groove.

4. The pantograph driving device according to claim 1, characterized in that: The two first sheaves and the two second sheaves each include two sheaves of different diameters, one large and one small.

5. The pantograph driving device according to claim 1, characterized in that: The driving motor is installed on the bracket and is located inside the winding drum. The driving motor is connected to the winding drum through a transmission mechanism.

6. The pantograph driving device according to claim 1, characterized in that: The bracket includes two parallel and spaced-apart vertical plates and a plurality of connecting rods connected between the two vertical plates. The winding drum is rotatably arranged between one ends of the two vertical plates. The other ends of the two vertical plates are connected by a connecting plate. The tension sensor is arranged on the connecting plate. The movable frame is located between the winding drum and the connecting plate. The sensing end of the tension sensor is connected to the movable frame.

7. The pantograph driving device according to claim 1, characterized in that: The movable frame has a rotating end and a free end that are arranged opposite to each other. The rotating end is rotatably connected to the bracket through a rotating member. The sliding rod is arranged close to the free end. The tension sensor is connected between the bracket and the free end of the movable frame.

8. The pantograph driving device according to claim 1, characterized in that: The fixed wheel group also includes a mounting seat, and the two second groove wheels are rotatably arranged on the mounting seat, and the mounting seat is installed on the bracket.

9. The pantograph driving device according to any one of claims 1 to 8, characterized in that: The pantograph driving device further includes an encoder, which is disposed on the motor shaft of the driving motor and is used to detect the number of revolutions of the motor shaft of the driving motor.

10. A pantograph testing device, characterized in that: It comprises a pantograph driving device as described in any one of claims 1 to 9.

Images