阅读说明：本技术 一种基于受电弓的自适应恒压接触机构 (Self-adaptive constant-voltage contact mechanism based on pantograph ) 是由 闫龙 于 2021-08-25 设计创作，主要内容包括：本发明涉及受电弓设备技术领域,且公开了一种基于受电弓的自适应恒压接触机构,包括固定桁架,固定桁架的顶端固定安装有固定框架,固定框架顶端的中部固定安装有导电碳板Ⅰ,固定桁架的两侧分别通过一组连接卡板固定安装有固定导轮,固定框架的外围活动套接活动框架并与固定导轮的外表面之间传动连接,活动框架的两端分别通过一组平衡弹簧与固定桁架的两侧之间固定连接。该基于受电弓的自适应恒压接触机构,对于固定导轮、活动框架以及平衡弹簧的设置,当接触网因季节的热胀热缩影响或是在区域跨度较大而发生弧形坠落时,可有效通过活动框架的左右滑动偏移,以保持活动框架上的接触球体与接触网之间的压力大小。(The invention relates to the technical field of pantograph equipment, and discloses a self-adaptive constant-voltage contact mechanism based on a pantograph, which comprises a fixed truss, wherein a fixed frame is fixedly arranged at the top end of the fixed truss, a conductive carbon plate I is fixedly arranged in the middle of the top end of the fixed frame, fixed guide wheels are fixedly arranged on two sides of the fixed truss through a group of connecting clamping plates respectively, a movable frame is movably sleeved on the periphery of the fixed frame and is in transmission connection with the outer surface of the fixed guide wheels, and two ends of the movable frame are fixedly connected with two sides of the fixed truss through a group of balance springs respectively. This self-adaptation constant voltage contact mechanism based on pantograph to fixed guide pulley, movable frame and balance spring's setting, when the contact net because of the thermal expansion pyrocondensation influence of season or when the arc takes place to fall in regional span is great, can effectively shift through movable frame's horizontal slip to keep the pressure size between the contact spheroid on the movable frame and the contact net.)

1. The utility model provides a self-adaptation constant voltage contact mechanism based on pantograph, includes fixed truss (1), the top fixed mounting of fixed truss (1) has fixed frame (2), the middle part fixed mounting on fixed frame (2) top has conductive carbon plate I (3), its characterized in that: two sides of the fixed truss (1) are respectively fixedly provided with a fixed guide wheel (5) through a group of connecting clamping plates (4), the periphery of the fixed frame (2) is movably sleeved with the movable frame (6) and is in transmission connection with the outer surface of the fixed guide wheel (5), the top of the movable frame (6) is of an arc structure, two ends of the movable frame (6) are respectively and fixedly connected with two sides of the fixed truss (1) through a group of balance springs (7), the middle part of the bottom end of the movable frame (6) is fixedly provided with a conductive carbon plate II (8) which is in friction contact with the conductive carbon plate I (3) on the fixed truss (1), the middle part of the top end of the movable frame (6) is provided with a groove with a hemispherical structure, and a group of contact balls (9) are movably sleeved on the two sides of the groove of the contact net respectively and are in friction contact with the outer surface of the contact net.

2. The pantograph-based adaptive constant voltage contact mechanism of claim 1, wherein: the contact ball body (9) is made of carbon materials and is electrically connected with the conductive carbon plate II (8) on the fixed truss (1).

3. The pantograph-based adaptive constant voltage contact mechanism of claim 2, wherein: the conductive carbon plate II (8) on the fixed truss (1) is positioned in the middle of the conductive carbon plate I (3) on the fixed truss (1) in an initial state, and the maximum swinging amplitude of the Z shape in the contact net is smaller than half of the length of the conductive carbon plate I (3).

4. The pantograph-based adaptive constant voltage contact mechanism of claim 3, wherein: the balance spring (7) is in a stretched state in an initial state, and the stretched length of the balance spring is larger than the amplitude of zigzag swinging in the overhead line system.

Technical Field

The invention relates to the technical field of pantograph equipment, in particular to a self-adaptive constant-voltage contact mechanism based on a pantograph.

Background

The pantograph is a device which is arranged on the roof of a motor car to contact with a contact net and provides electric support for the motor car, but because the speed of the motor car is higher, a zigzag swinging friction contact mode is often adopted between a sliding plate and the contact net to reduce the abrasion of the sliding plate on the motor car.

Although the zigzag contact mode can effectively reduce the abrasion condition of the sliding plate, the contact mode becomes very unstable under the high-speed running of the motor train, and the higher the speed of the motor train is, the larger the swing amplitude of the contact net is, so that the phenomena of off-line and ignition between the two sides of the sliding plate and the contact net are caused, the damage to electronic elements in the motor train is easily caused, and meanwhile, the service life of the sliding plate is greatly influenced;

and, the contact net receives the thermal expansion pyrocondensation influence of season or when the region span is great, only its arc that takes place different degrees phenomenon of falling, and then the in-process pressure with the slide contact is great, has aggravated the wearing and tearing of slide, simultaneously, has further increased the amplitude of fluctuation of contact net, has increased off-line between its and the slide, the frequency of striking sparks, stability and reliability are relatively poor.

Therefore, a contact mechanism based on a pantograph is needed to solve the above-mentioned drawbacks of the conventional pantograph.

Disclosure of Invention

Technical problem to be solved

The invention provides a self-adaptive constant-voltage contact mechanism based on a pantograph, which has the advantages of stably keeping constant-voltage contact between a contact net and a sliding plate, effectively reducing the swing amplitude of the contact net to ensure that the contact net is not easy to generate offline sparking in the process of high-speed running of a motor car, prolonging the service life of the sliding plate, and having higher stability and reliability.

(II) technical scheme

The invention provides the following technical scheme: an adaptive constant-voltage contact mechanism based on a pantograph comprises a fixed truss, a fixed framework is fixedly arranged at the top end of the fixed truss, the middle part of the top end of the fixed frame is fixedly provided with a conductive carbon plate I, two sides of the fixed truss are respectively fixedly provided with a fixed guide wheel through a group of connecting clamping plates, the periphery of the fixed frame is movably sleeved with the movable frame and is in transmission connection with the outer surface of the fixed guide wheel, the top of the movable frame is of an arc structure, two ends of the movable frame are respectively and fixedly connected with two sides of the fixed truss through a group of balance springs, the middle part of the bottom end of the movable frame is fixedly provided with a conductive carbon plate II which is in friction contact with the conductive carbon plate I on the fixed truss, the middle part of the top end of the movable frame is provided with a groove with a hemispherical structure, and a group of contact balls are movably sleeved on two sides of the groove of the contact net respectively to be in friction contact with the outer surface of the contact net.

Preferably, the contact ball is made of carbon materials and is electrically connected with the conductive carbon plate II on the fixed truss.

Preferably, the conductive carbon plate II on the fixed truss is positioned in the middle of the conductive carbon plate I on the fixed truss in an initial state, and the maximum swinging amplitude of the Z shape in the contact net is smaller than half of the length of the conductive carbon plate I.

Preferably, the balance spring is in a stretched state in an initial state, and the stretched length of the balance spring is greater than the amplitude of zigzag oscillation in the catenary.

(III) advantageous effects

The invention has the following beneficial effects:

1. this self-adaptation constant voltage contact mechanism based on pantograph to fixed guide pulley, movable frame and balance spring's setting, and through movable frame's sliding action, with "it" style of calligraphy swing in the contact net and change into balance spring's elastic potential energy, thereby reduce its swing range under the motor car high speed is gone down effectively, can keep the state of contacting all the time between the contact spheroid on with the movable frame with ensureing, compare with current pantograph, the phenomenon of difficult off-line, striking sparks takes place, stability and reliability are higher, simultaneously, because of being in the state of indirect contact between contact net and the conductive carbon plate I on the fixed truss, and then reduced its wearing and tearing to conductive carbon plate I on the fixed truss produced effectively, prolonged its life-span.

2. This self-adaptation constant voltage contact mechanism based on pantograph, to fixed guide pulley, movable frame and balance spring's setting, when the contact net because of the thermal expansion pyrocondensation influence of season or when the arc takes place to fall at the regional span is great, can effectively pass through movable frame's horizontal slip skew to keep the pressure size between the contact spheroid on the movable frame and the contact net, make it can not take place the phenomenon of excessive wearing and tearing because of pressure is too big, further improved this pantograph stability and reliability at the operation in-process.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a front view of the structure of the present invention;

FIG. 3 is an enlarged view of the point A in FIG. 1.

In the figure: 1. fixing the truss; 2. a fixed frame; 3. a conductive carbon plate I; 4. connecting a clamping plate; 5. fixing the guide wheel; 6. a movable frame; 7. a balance spring; 8. a conductive carbon plate II; 9. contacting the ball.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, a self-adaptive constant voltage contact mechanism based on a pantograph comprises a fixed truss 1, a fixed frame 2 is fixedly installed at the top end of the fixed truss 1, a conductive carbon plate i 3 is fixedly installed in the middle of the top end of the fixed frame 2, fixed guide wheels 5 are fixedly installed on two sides of the fixed truss 1 through a set of connecting clamping plates 4 respectively, a movable frame 6 is movably sleeved on the periphery of the fixed frame 2 and is in transmission connection with the outer surface of the fixed guide wheels 5, the top of the movable frame 6 is of an arc structure, the movable frame 6 is made of elastic materials, so that the pressure between the movable frame 6 and a contact net is effectively maintained, the influence of thermal expansion and thermal shrinkage in seasons or the influence of pressure change generated by large regional span is reduced, two ends of the movable frame 6 are fixedly connected with two sides of the fixed truss 1 through a set of balance springs 7 respectively, the middle part of the bottom end of the movable frame 6 is fixedly provided with a conductive carbon plate II 8 and a conductive carbon plate I3 on the fixed truss 1 for friction contact, the middle part of the top end of the movable frame 6 is provided with a groove with a hemispherical structure, and a group of contact balls 9 and the outer surface of a contact net are movably sleeved on two sides of the groove respectively for friction contact.

The fixed guide wheel 5, the movable frame 6 and the balance spring 7 are arranged, and the Z-shaped sliding in a contact net is converted into the elastic potential energy of the balance spring 7 through the sliding action of the movable frame 6, so that the swinging amplitude of the movable frame under the high-speed running of the motor car is effectively reduced, the contact state between the movable frame and the contact ball 9 on the movable frame 6 can be always kept, compared with the existing pantograph, the phenomena of off-line and ignition are not easy to occur, the stability and the reliability are higher, meanwhile, the abrasion of the conductive carbon plate I3 on the fixed truss 1 is effectively reduced, and the service life of the movable frame is prolonged.

In the technical scheme, the contact ball body 9 is made of carbon materials and is electrically connected with the conductive carbon plate II 8 on the fixed truss 1.

The contact ball 9 is made of a material, so that the contact ball can guide the current on the contact net, and meanwhile, the abraded powder can also form a lubricating effect on the contact between the contact ball and the contact net.

In the technical scheme, the conductive carbon plate II 8 on the fixed truss 1 is positioned in the middle of the conductive carbon plate I3 on the fixed truss 1 in an initial state, and the maximum swing amplitude of the shape of the Chinese character 'zhi' in the contact network is smaller than half of the length of the conductive carbon plate I3.

Wherein, to the injecing of conductive carbon plate I3 length to ensure that can keep the state that contacts all the time when the contact net takes place to swing between conductive carbon plate II 8 on this constant voltage contact mechanism and conductive carbon plate I3, and then ensure that the electric current on the contact net can be stably effectively guided to the motor car on.

In the technical scheme, the balance spring 7 is in a stretched state in an initial state, and the stretched length of the balance spring is greater than the amplitude of zigzag swinging in a contact net.

Wherein, to the setting of the extension length of balance spring 7 to when guaranteeing that the movable frame 6 takes place the horizontal slip because of the swing of contact net, under the elastic action of two sets of balance spring 7, can bring back movable frame 6 to initial position effectively, simultaneously, utilize the elasticity on two sets of balance spring 7, can resist the oscillating pressure on the contact net effectively, with the size that reduces its amplitude of oscillation, improve this contact mechanism stability and reliability at the operation in-process.

The use method and the working principle of the embodiment are as follows:

firstly, the constant-pressure contact mechanism is fixedly arranged on a lifting mechanism on a pantograph, when the constant-pressure contact mechanism is used, the lifting mechanism is started to move a contact ball 9 on a movable frame 6 upwards to keep contact with the contact ball and generate a certain pressure state, then, when a contact net swings in a shape like Chinese character 'ji', the contact ball 9 is in a contact state with the contact net, the movable frame 6 is driven to slide in a corresponding direction under the transmission action of a fixed guide wheel 5, the pressure of the swing in the shape like Chinese character 'ji' in the contact net is converted into the elastic potential energy of a balance spring 7, the swing amplitude is effectively reduced, the contact ball 9 on the movable frame 6 can be always kept in a contact state, the phenomena of off-line and ignition cannot occur, and meanwhile, the contact net is in a non-direct contact state with a fixed frame 2 on a fixed truss 1, and then reduce the contact net and to the produced direct wearing and tearing of conductive carbon plate I3 effectively, prolonged the life of conductive carbon plate I3 on fixed truss 1.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.