Spring pantograph adjusting force system

Abstract

The invention discloses a spring pantograph force adjusting system which comprises a bottom frame, a spring system, a force adjusting mechanism and an electric drive system. The bottom frame is of a frame welding structure, located at the bottom of the pantograph and used for supporting connecting components, the spring system is used for driving the lower arm to enable the pantograph to rise, and the force adjusting mechanism and the electric drive system are used for adjusting force. According to the spring pantograph force adjusting system, a force adjusting mechanism, an electric drive system and a spring drive system are integrally designed at the position of a pantograph underframe, the purpose that the spring force is adjustable in the pantograph running process is achieved, and the problems that the spring force of a high-speed spring pantograph cannot be adjusted, and the pantograph net following performance under high-speed running cannot be guaranteed are solved. And the high-speed operation current collection performance of the spring pantograph is ensured.

Description

Technical Field

[0001] The invention relates to a pantograph for an EMU, and in particular to a spring pantograph regulating force system. Background Art

[0002] At present, with the increase of EMU speed, the interaction between the pantograph and the contact network is increasingly affected by its own resistance and external airflow. To ensure good pantograph and contact network tracking, the contact force between the carbon slide plate and the contact network needs to be increased accordingly.

[0003] The traditional spring pantograph only relies on spring force to provide the pantograph-net contact force. The spring force cannot be adjusted during the pantograph raising process. When the pantograph runs at high speed, poor pantograph-net current collection is prone to occur.

[0004] In the prior art, the pantograph is installed on the roof of the EMU and is easily affected by the external environment. The external environment has put forward higher requirements on the design of the pantograph of the high-speed EMU. The traditional high-speed pantograph adopts an airbag drive device. In order to ensure good pantograph-net following performance under high-speed conditions, an active control and adjustment system is usually set. As the vehicle speed increases, the pressure of the airbag drive system is increased and transmitted to the bow head through the bow body connecting rod mechanism, which increases the contact pressure of the pantograph-net, ensures good pantograph-net following performance under high-speed conditions, and guarantees the current collection performance of the pantograph-net. When the pantograph using a spring drive system is applied to a high-speed EMU, since the spring force cannot be adjusted after the spring installation position is fixed, the spring drive system cannot adaptively increase the driving force as the EMU speed increases under high-speed operation, which easily leads to insufficient pantograph-net contact pressure under high-speed operation, resulting in decreased pantograph-net following performance and poor pantograph-net current collection performance.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a spring pantograph force adjustment system to solve the above-mentioned technical problems existing in the prior art.

[0007] The objective of the present invention is achieved through the following technical solutions:

[0008] The spring pantograph force regulating system of the present invention comprises a base frame 1, a spring system 2, a force regulating mechanism 3, and an electric drive system 4;

[0009] The chassis 1 is a frame welding structure, located at the bottom of the pantograph, and includes a crossbeam 10 and a longitudinal beam 11, which are used to connect component supports. After the crossbeam 10 and the longitudinal beam 11 are welded together, the crossbeam 10 is used to be welded to the support beam 30, and the longitudinal beam 11 is used to be welded to the fixing seat 41.

[0010] Compared with the prior art, in the pantograph adjustment force system provided by the present invention, during the operation of a high-speed EMU, the pantograph head carbon slide contacts the catenary to receive current. During operation, the driving device installed at the pantograph underframe transmits the driving force to the pantograph head through the pantograph body rods, ensuring stable contact between the carbon slide and the catenary. This structure is installed at the pantograph underframe part. During the operation of the EMU, as the vehicle running speed increases, the spring force of the underframe pantograph-raising spring can be adjusted in real time by controlling the adjustment force mechanism, improving the good following performance of the pantograph and catenary at high speeds, and ensuring the current collection performance of the pantograph and catenary during high-speed operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Schematic diagram of the position of the pantograph adjustment force system provided by the embodiment of the present invention;

[0012] Figure 2 Structural composition diagram of the pantograph adjustment force system of the embodiment of the present invention;

[0013] Figure 3 Detailed structural composition diagram of the pantograph adjustment force system of the embodiment of the present invention;

[0014] Figure 4 Schematic diagram of the force adjustment and non-force adjustment states of the pantograph adjustment force system of the embodiment of the present invention;

[0015] In the figure, 1. Underframe; 10. Cross beam; 11. Longitudinal beam; 2. Spring system; 20. Steel rope; 21. Spring; 22. Spring rod; 3. Force adjustment mechanism; 30. Support beam; 31. Fixed plate; 32. Movable plate; 33. Guide post; 34. Limit plate; 4. Electric drive system; 40. Motor; 41. Fixed seat; 42. Push rod; 43. Fastening assembly. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following clearly and completely describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments, which does not constitute a limitation to the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0017] First, the following explanations are given for the terms that may be used in this article:

[0018] Descriptions using terms such as "including", "comprising", "containing", "having" or other similar semantics shall be construed as non-exclusive inclusion. For example, including a technical feature element (such as raw material, component, ingredient, carrier, dosage form, material, dimension, part, component, mechanism, device, step, process, method, reaction condition, processing condition, parameter, algorithm, signal, data, product or article, etc.) shall be construed as not only including the explicitly listed technical feature element, but also including other technical feature elements well-known in the art that are not explicitly listed.

[0019] The term "consisting of" means excluding any technical feature element not explicitly listed. If this term is used in a claim, it will make the claim a closed type, so that it does not include technical feature elements other than the explicitly listed ones, except for conventional impurities related thereto. If this term only appears in a sub-clause of a claim, then it only limits the elements explicitly listed in that sub-clause, and the elements recorded in other sub-clauses are not excluded from the overall claim.

[0020] Unless otherwise explicitly specified or limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example: it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this text can be understood according to specific circumstances.

[0021] The content not described in detail in the embodiments of the present invention belongs to the prior art well-known to those of ordinary skill in the art. For those conditions not specified in the embodiments of the present invention, they shall be carried out according to the conventional conditions in the art or the conditions recommended by the manufacturer. For the reagents or instruments used in the embodiments of the present invention without indicating the manufacturer, they are all conventional products that can be obtained through commercial purchase.

[0022] The pantograph force adjustment system of the present invention includes a chassis 1, a spring system 2, a force adjustment mechanism 3, and an electric drive system 4;

[0023] The chassis 1 is a frame welding structure located at the bottom of the pantograph, including a cross beam 10 and a longitudinal beam 11, which are used for connecting components for support. After the cross beam 10 and the longitudinal beam 11 are welded together, the cross beam 10 is used for welding and connecting with the support beam 30, and the longitudinal beam 11 is used for welding and connecting with the fixed seat 41.

[0024] The spring system 2 includes a steel rope 20, a spring 21, and a spring rod 22.

[0025] One end of the steel cable 20 is connected to the lower arm and is used to drive the lower arm to raise the pantograph. The other end of the steel cable 20 is connected to the spring 21 and is used to transmit the spring force. One end of the spring 21 is connected to the steel cable 20, and the other end is connected to the spring rod 22. One end of the spring rod 22 is connected to the spring 21, and the other end passes through the fixing plate 31 and is fixedly connected to the movable plate 32, and is used to transmit the adjusting force for adjusting the spring 21.

[0026] The force adjusting mechanism 3 includes a support beam 30, a fixing plate 31, a movable plate 32, a guide post 33, and a limit plate 34.

[0027] One end of the support beam 30 is connected to the cross beam 10 by group welding. The other end of the support beam 30 is connected to the fixing plate 31 by group welding. The lower part of the fixing plate 31 is connected to the support beam 30 by group welding. Through holes for the spring rod 22 and the push rod 42 to pass through are respectively provided in the upper part of the fixing plate 31. The movable plate 32 is provided with 3 through holes and a blind hole. Two through holes in the lower part of the movable plate 32 respectively pass through the guide posts 33. The through hole in the upper part of the movable plate 32 passes through the spring rod 22. The end of the spring rod 22 is fixedly connected to the movable plate 32. The blind hole in the upper part of the movable plate 32 is connected to the push rod 42. The guide posts 33 are connected to the fixing plate 31 by group welding. The guide posts 33 pass through the through holes in the lower part of the movable plate 32 and are used to guide the movable plate 32. The limit plate 34 is connected to the guide posts 33 and is used to limit the movable plate 32.

[0028] The electric drive system 4 includes a motor 40, a fixed seat 41, a push rod 42, and a fastening assembly 43.

[0029] One end of the motor 40 is connected to the fixed seat 41, and the other end of the motor 40 is connected to the push rod 42. The motor 40 is used to provide driving force for the push rod 42. The lower part of the fixed seat 41 is connected to the longitudinal beam 11 by group welding. The upper part of the fixed seat 41 is used to be fixedly connected to the motor 40. One end of the push rod 42 is connected to the motor 40, and the other end of the push rod 42 passes through the through hole of the fixing plate 31 and is connected to the blind hole of the movable plate 32 in a matching manner. The fastening assembly 43 is used to fasten and connect the motor 40 and the fixed seat 41.

[0030] In summary, for the spring force adjusting system of the pantograph in the embodiment of the present invention, the spring force adjusting system of the pantograph adopts an integrated design of a force adjusting mechanism, an electric drive system and a spring drive system at the pantograph underframe part, so as to achieve the purpose of adjustable spring force during the operation of the pantograph, solve the problems that the spring force of the high-speed spring pantograph cannot be adjusted and the pantograph-catenary followability cannot be guaranteed during high-speed operation, and ensure the current collection performance of the spring pantograph during high-speed operation;

[0031] It solves the problem that the output force of the spring pantograph drive system cannot be adjusted under high-speed operation conditions. By adding a structure for adjusting the spring force in the pantograph lifting spring drive system, the force of the spring drive system can be adjusted under high-speed operation conditions of the pantograph, so that the pantograph-catenary contact force meets the requirements of high-speed operation and ensures the current collection performance of the spring pantograph of high-speed multiple units.

[0032] In order to more clearly show the technical solutions provided by the present invention and the technical effects produced, the following will describe in detail the embodiments provided by the present invention with specific embodiments.

[0033] Embodiment 1

[0034] As Figures 1-4 shown, the force adjustment system of the spring pantograph in this embodiment includes a chassis 1, a spring system 2, a force adjustment mechanism 3, and an electric drive system 4.

[0035] The chassis 1 includes a cross beam 10 and a longitudinal beam 11.

[0036] The spring system 2 includes a steel wire rope 20, a spring 21, and a spring rod 22.

[0037] The force adjustment mechanism 3 includes a support beam 30, a fixing plate 31, a movable plate 32, a guide post 33, and a limit plate 34.

[0038] The electric drive system 4 includes a motor 40, a fixed seat 41, a push rod 42, and a fastening assembly 43.

[0039] When the pantograph operates at low speed, the pantograph-catenary contact force is provided by the spring system, and the spring force adjustment system is in a non-force adjustment state. Specifically: the motor 40 is in a non-operating state, and the movable plate 32 is in a fitting state with the fixing plate 31 under the action of the spring force of the spring rod 22. In this state, the driving force for the pantograph to work comes entirely from the spring return force provided by the spring 21.

[0040] When the pantograph is running at high speed, the spring system itself cannot provide enough driving force to ensure good pantograph-catenary contact force under high-speed operation. The pantograph-catenary contact force is provided by the spring restoring force provided by spring 21 and the additional adjusting force provided by the spring force adjusting system. The spring force adjusting system is in the force adjusting state, specifically: the motor 40 is in the working state. As the vehicle speed increases, the motor 40 receives control signals corresponding to different speeds and provides different output forces F. The push rod 42 is used to push the movable plate 32 to generate different displacements S. The movable plate 32 generates a displacement along the direction of the guide post 33 under the action of the force F of the push rod 42. The movable plate 32 generates a displacement along the guide post 33 and drives the spring rod 22 connected to the movable plate 32 to generate a displacement along the direction of the guide post 33. The spring rod 22 drives the spring 21 to generate a stretching movement. The steel cable 20 fixedly connected to the spring 21 acts on the lower arm of the pantograph with the increased spring force. Through the force transmission of the bow arm, the pantograph-catenary contact force increases accordingly, improving the pantograph-catenary contact force of the pantograph under high-speed operation and ensuring the current collection quality of the pantograph under high-speed operation.

[0041] The underframe 1 is a frame welded structure located at the bottom of the pantograph, including a cross beam 10 and a longitudinal beam 11, which are used for supporting the underframe connection components. After the cross beam 10 and the longitudinal beam 11 are welded together, the cross beam 10 is used for welding and connecting with the support beam 30, and the longitudinal beam 11 is used for welding and connecting with the fixed seat 41.

[0042] The spring system 2 includes a steel cable 20, a spring 21, and a spring rod 22. One end of the steel cable 20 is connected to the lower arm and is used to drive the lower arm to raise the pantograph. The other end of the steel cable 20 is connected to the spring 21 and is used to transmit the spring force. One end of the spring 21 is connected to the steel cable 20, and the other end is connected to the spring rod 22. One end of the spring rod 22 is connected to the spring 21, and the other end passes through the fixed plate 31 and is fixedly connected to the movable plate 32, which is used to transmit the adjusting force for adjusting the spring 21.

[0043] The force adjusting mechanism 3 includes a support beam 30, a fixed plate 31, a movable plate 32, a guide post 33, and a limit plate 34. One end of the support beam 30 is welded and connected to the cross beam 10, and the other end of the support beam 30 is welded and connected to the fixed plate 31. The lower part of the fixed plate 31 is welded and connected to the support beam 30. Through holes for the spring rod 22 and the push rod 42 to pass through are respectively provided on the upper part of the fixed plate 31. The movable plate 32 is provided with 3 through holes and one blind hole. Two through holes in the lower part of the movable plate 32 respectively pass through the guide post 33, and the through hole in the upper part of the movable plate 32 passes through the spring rod 22. The end of the spring rod 22 is fixedly connected to the movable plate 32. The blind hole in the upper part of the movable plate 32 is connected to the push rod 42. The guide post 33 is welded and connected to the fixed plate 31. The guide post 33 passes through the through holes in the lower part of the movable plate 32 and is used to guide the movable plate 32. The limit plate 34 is connected to the guide post 33 and is used to limit the movable plate 32.

[0044] The electric drive system 4 includes a motor 40, a fixed seat 41, a push rod 42, and a fastening assembly 43. One end of the motor 40 is connected to the fixed seat 41, and the other end of the motor 40 is connected to the push rod 42. The motor 40 is used to provide driving force for the push rod 42. The lower part of the fixed seat 41 is welded to the longitudinal beam 11, and the upper part of the fixed seat 41 is used to be fixedly connected to the motor 40. One end of the push rod 42 is connected to the motor 40, and the other end of the push rod 42 passes through the through hole of the fixed plate 31 and is in fit connection with the blind hole of the movable plate 32. The fastening assembly 43 is used to fasten and connect the motor 40 and the fixed seat 41.

[0045] The spring force adjustment system of the pantograph of the present invention is installed at the underframe part of the pantograph. During the operation of the EMU, according to the speed increase, the spring force of the lifting spring of the underframe can be adjusted in real time by controlling the force adjustment mechanism according to the vehicle running speed, so as to meet the requirement of the contact force between the pantograph and the catenary for high-speed operation and ensure the current collection performance between the pantograph and the catenary under high-speed operation of the spring-loaded pantograph.

[0046] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims. The information disclosed in the background art part of this article is only intended to deepen the understanding of the overall background art of the present invention, and should not be regarded as an admission or any form of implication that this information constitutes the prior art known to those skilled in the art.

Claims

1. A pantograph regulating force system, characterized in that, It includes a chassis (1), a spring system (2), a force adjustment mechanism (3), and an electric drive system (4); The chassis (1) is a frame welded structure located at the bottom of the pantograph, including a cross beam (10) and a longitudinal beam (11), which are used for connecting components for support. After the cross beam (10) and the longitudinal beam (11) are welded together, the cross beam (10) is used for welded connection with the support beam (30), and the longitudinal beam (11) is used for welded connection with the fixed seat (41).

2. The pantograph adjusting force system according to claim 1, wherein, The spring system (2) includes a steel rope (20), a spring (21), and a spring rod (22).

3. The pantograph adjusting force system according to claim 2, characterized in that, One end of the steel rope (20) is connected to the lower arm and is used to drive the lower arm to raise the pantograph. The other end of the steel rope (20) is connected to the spring (21) and is used to transmit the spring force. One end of the spring (21) is connected to the steel rope (20), and the other end is connected to the spring rod (22). One end of the spring rod (22) is connected to the spring (21), and the other end passes through the fixed plate (31) and is fixedly connected to the movable plate (32), which is used to transmit the adjustment force for adjusting the spring (21).

4. The pantograph adjusting force system according to claim 1, characterized in that The force adjustment mechanism (3) includes a support beam (30), a fixed plate (31), a movable plate (32), a guide post (33), and a limit plate (34).

5. The pantograph adjusting force system according to claim 4, characterized in that, One end of the support beam (30) is welded and connected to the cross beam (10), and the other end of the support beam (30) is welded and connected to the fixed plate (31). The lower part of the fixed plate (31) is welded and connected to the support beam (30). Through holes for the spring rod (22) and the push rod (42) to pass through are respectively provided in the upper part of the fixed plate (31). The movable plate (32) is provided with 3 through holes and a blind hole. The two through holes in the lower part of the movable plate (32) respectively pass through the guide posts (33). The through hole in the upper part of the movable plate (32) passes through the spring rod (22). The end of the spring rod (22) is fixedly connected to the movable plate (32). The blind hole in the upper part of the movable plate (32) is connected to the push rod (42). The guide posts (33) are welded and connected to the fixed plate (31). The guide posts (33) pass through the through holes in the lower part of the movable plate (32) and are used to guide the movable plate (32). The limit plate (34) is connected to the guide posts (33) and is used to limit the movable plate (32).

6. The pantograph adjusting force system according to claim 1, wherein The electric drive system (4) includes a motor (40), a fixed seat (41), a push rod (42), and a fastening assembly (43).

7. The pantograph adjusting force system according to claim 6, characterized in that, One end of the motor (40) is connected to the fixed seat (41), and the other end of the motor (40) is connected to the push rod (42). The motor (40) is used to provide driving force for the push rod (42). The lower part of the fixed seat (41) is welded and connected to the longitudinal beam (11). The upper part of the fixed seat (41) is used for fixed connection with the motor (40). One end of the push rod (42) is connected to the motor (40), and the other end of the push rod (42) passes through the through hole of the fixed plate (31) and is in mating connection with the blind hole of the movable plate (32). The fastening assembly (43) is used to tightly connect the motor (40) and the fixed seat (41).

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