Fabricated resistance grid and novel resistor for dumper braking

Abstract

The utility model relates to the technical field of vehicle braking, and discloses an assembly type resistance grid and a novel resistor for dumper braking, the assembly type resistance grid comprises a resistance grid body and taps welded at two ends of the top of the resistance grid body; the resistance grid body is formed by welding the same ends of a plurality of resistance grid units which are arranged in parallel in pairs; each resistance grid unit is formed by welding two resistance tapes which are symmetrically arranged; connecting lug plates which protrude in opposite directions and are parallel to the resistance tapes are respectively arranged at the two ends of the resistance tapes, and one ends of the two adjacent resistance tapes are overlapped and welded through the connecting lug plates; and mounting holes are formed in the connecting lug plates of the resistance tape. According to the resistor grid designed by the utility model, the manufacturing efficiency can be effectively improved, the labor intensity is reduced, and the resistor tapes are uniformly pressed, so that the consistency is good and the assembly precision is high; in addition, the structure can install the insulator from the end part of the resistance tape, so that the installation efficiency of the insulator is improved, and the installation difficulty of the insulator is reduced.

Description

Technical Field

[0001] This utility model relates to the field of vehicle braking technology, and in particular to an assembled resistor grid and a novel resistor for the braking of dump trucks, which is suitable for the braking system of mining dump trucks. Background Technology

[0002] Mining dump trucks are heavy and have large load capacities. When driving on long, winding, and steep mining roads, they often need to brake and slow down to cope with the complex road conditions and ensure the safety of the workers and the truck itself. The efficiency of the conversion and consumption of residual electrical energy during braking is determined by the resistor grid. Existing resistor grids have complex structures, are difficult to manufacture and assemble, and have a short service life.

[0003] To address the shortcomings of existing resistor gate structures, the applicant filed a patent application for a novel resistor gate on January 28, 2021, with application number CN202220239980.0. Upon further research, the applicant discovered the following deficiencies in this novel resistor gate:

[0004] 1. This type of resistor grid is stamped from a single resistor strip. During the stamping process, the strip needs to be repeatedly turned over, which results in low production efficiency and complicated procedures. Moreover, after stamping the reinforcing ribs and mounting holes on the entire strip, it is necessary to position and bend it. When bending the entire strip, errors and deviations are easily generated, causing the insulators to deviate from the same center line and making it impossible to successfully complete the assembly requirements of the resistor grid.

[0005] 2. The bent resistor grid requires insulation and fixing installation using three rows of insulators (top, middle, and bottom) and screws. The assembly is difficult, time-consuming, and labor-intensive. In addition, the insulators can only be installed from the side of the resistor grid, making the installation of the insulators difficult.

[0006] 3. Since the insulator cannot be securely installed inside the resistor grid, it is impossible to assemble the resistor grid body and the insulator into a whole before installing them into the mounting frame, which also presents the problem of complicated assembly.

[0007] Based on this, this application provides an assembled resistor grid with a more reasonable structural design, simpler installation and operation, and reduced manufacturing difficulty to solve the above problems. Utility Model Content

[0008] The present invention aims to solve the technical problems existing in the prior art. Therefore, the present invention provides an assembled resistor grid and a novel resistor for dump truck braking, which has a more reasonable structural design, is simpler to install and operate, and reduces manufacturing difficulty.

[0009] The technical solution adopted by this utility model to solve its technical problem is:

[0010] In a first aspect, an assembled resistor grid is provided, comprising a resistor grid body and taps welded to both ends of the top of the resistor grid body; the resistor grid body is formed by welding two resistor grid units arranged in parallel from the same end; the resistor grid unit is formed by welding two symmetrically arranged resistor strips; each end of the resistor strip is provided with a connecting lug plate protruding in opposite directions and parallel to the resistor strip, and one end of two adjacent resistor strips is overlapped and welded together through the connecting lug plate; the connecting lug plate of the resistor strip is provided with mounting holes.

[0011] In a preferred embodiment of this utility model, the mounting hole is a vertical oval hole.

[0012] In a preferred embodiment of this utility model, the resistor strip is stamped with reinforcing ribs along its length.

[0013] In a preferred embodiment of this utility model, the tap is a side-extending tap or an top-extending tap.

[0014] In a preferred embodiment of this utility model, an inner support assembly is further included. The inner support assembly is disposed on the resistor grid unit and is used to prevent the resistor strip from short-circuiting due to thermal deformation. It consists of an insulating screw and two insulating nuts. A through hole is provided in the middle of one of the resistor strips of the resistor grid unit. The insulating screw passes through the through hole and is fastened at both ends by the insulating nuts. The thickness of the insulating nuts is equal to the width between two adjacent resistor strips.

[0015] In a preferred embodiment of this utility model, both the insulating nut and the insulating screw are made of 95 ceramic.

[0016] In a preferred embodiment of this utility model, an isolation component is further included. The isolation component includes an isolation insulator, a connecting insulator, and a locking insulator. One end of the isolation insulator has a protruding neck that can be inserted into a mounting hole of the resistor strip, and the protruding neck has an external thread. The other end of the isolation insulator has a countersunk hole that engages with the protruding neck. One end of the locking insulator has a threaded hole that is threadedly connected to the protruding neck of the isolation insulator. One end of the connecting insulator has a protruding post that engages with the countersunk hole of the isolation insulator, and the other end has a threaded post that is threadedly connected to the threaded hole of the locking insulator. The connecting lugs of adjacent resistor grid units of the resistor grid body are isolated by the isolation insulator, and both ends are fixed to the isolation insulator by screwing the locking insulator and the connecting insulator together.

[0017] In a preferred embodiment of this utility model, the isolation insulator, the connecting insulator, and the locking insulator are all provided with a central through hole.

[0018] In a preferred embodiment of the present invention, the isolation component further includes a mica tube, which is disposed in the central through hole of the isolation component.

[0019] Secondly, a novel resistor for braking a dump truck is provided, comprising the aforementioned assembled resistor grid, mounting frame, and mounting screw, wherein the assembled resistor grid is fixedly installed within the mounting frame by the mounting screw passing through a mica tube.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] 1. The resistor grid body of this utility model is welded from multiple resistor strips. Compared with the resistor grid made by bending a whole resistor strip, the process operation steps are optimized, which can effectively improve the production efficiency and reduce the labor intensity. At the same time, the resistor strips are uniformly pressed, resulting in good consistency and high assembly precision. In addition, this resistor grid structure can install insulators from the end of the resistor strip, which improves the installation efficiency of insulators and reduces the installation difficulty of insulators.

[0022] 2. Replacing the traditional installation of the central insulator and screw with an internal support assembly can meet the process requirements of preventing short circuits due to thermal deformation of the resistor strip, and at the same time, there is no need to deal with insulation measures between the screw and the insulator and the mounting frame.

[0023] 3. The designed isolation components enable the isolation insulator to be securely assembled with the resistor grid body into a whole, which facilitates the installation of mica tubes and mounting screws and reduces the installation difficulty of the resistor grid and the mounting frame. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0025] Figure 1 This is an installation structure diagram of the side-extending tap assembled resistor grid provided by this utility model;

[0026] Figure 2 This is an installation structure diagram of the top-extending tap assembled resistor grid provided by this utility model;

[0027] Figure 3 This is a connection structure diagram of the resistor grid unit provided by this utility model;

[0028] Figure 4 yes Figure 3 The provided side view;

[0029] Figure 5 This is a schematic diagram of the structure of the isolation insulator provided by this utility model;

[0030] Figure 6 This is a schematic diagram of the structure of the connecting insulator provided by this utility model;

[0031] Figure 7 This is a structural schematic diagram of the locking insulator provided by this utility model.

[0032] The attached diagram lists the components represented by each number as follows:

[0033] 1—Resistor grid body, 1.1—Resistor strip, 1.1.1—Connecting ear plate, 1.1.2—Through hole, 2—Tap, 3—Inner support assembly, 3.1—Insulating screw, 3.2—Insulating nut, 4—Isolation assembly, 4.1—Isolation insulator, 4.1.1—Neck, 4.1.2—Counterhole, 4.2—Connecting insulator, 4.2.1—Pin, 4.2.2—Stud, 4.3—Locking insulator, 4.3.1—Screw hole, 4.4—Mica tube, 5—Mounting screw, 6—Mounting frame. Detailed Implementation

[0034] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0036] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0038] Example 1

[0039] This embodiment provides an assembled resistor grid, including a resistor grid body 1 and taps 2 welded to both ends of the top of the resistor grid body. The taps can be as shown in the attached figure. Figure 1 The side-extending tap shown can also be as attached. Figure 2 The upper protruding tap is shown.

[0040] As attached Figure 1 Or attached Figure 2 As shown, the resistor grid body 1 is composed of multiple resistor grid units arranged in parallel, welded together at the same end; as shown in the attached figure. Figure 3 As shown, the resistor grid unit is formed by welding two symmetrically arranged resistor strips 1.1. Each resistor strip 1.1 has connecting lugs 1.1.1 protruding in opposite directions and parallel to the resistor strip at both ends. One end of two adjacent resistor strips is welded together via these connecting lugs. Specifically, during welding, the two resistor strips are arranged symmetrically, with the connecting lugs at one end overlapping and the connecting lugs at the other end remaining separate. The two overlapping connecting lugs are then welded to form the resistor grid unit. The resistor strips are then welded one by one to complete the process shown in the attached diagram. Figure 1 Or attached Figure 2 The welding of the resistor grid body shown is illustrated; alternatively, the resistor strips can be welded into resistor grid units and then welded together. In this embodiment, roll welding is preferred. (See attached image.) Figure 4 As shown, the connecting lug 1.1.1 of the resistor strip 1.1 is provided with mounting holes for fixing the resistor grid within the mounting frame. In this embodiment, the mounting holes are preferably oval holes, which eliminates manufacturing errors of the resistor strip and ensures smooth assembly. Preferably, the resistor strip is stamped with reinforcing ribs (not shown in the figure) along its length to increase its bending strength.

[0041] The resistor grid in this embodiment solves the problems of low manufacturing efficiency, complicated operation, and easy error and deviation accumulation caused by bending in traditional bending processes. The resistor grid with this structure allows the insulator to be installed from the end and side of the resistor strip, which reduces the installation difficulty of the insulator and improves the installation efficiency of the insulator.

[0042] Example 2

[0043] Based on Example 1, this example further optimizes the design of the resistor gate, as shown in the attached figure. Figure 1Appendix Figure 3 and attached Figure 4 As shown, this embodiment also includes an inner support assembly 3 on the resistor grid unit to prevent the resistor strip from short-circuiting due to thermal deformation. The inner support assembly 3 consists of an insulating screw 3.1 and two insulating nuts 3.2. In this embodiment, the insulating nuts and insulating screw are preferably made of 95 ceramic.

[0044] The specific installation structure of the inner support assembly is as follows: a through hole 1.1.2 is provided in the middle of one of the resistor strips 1.1 of the resistor grid unit. The insulating screw 3.1 passes through the through hole and is fastened at both ends by the insulating nuts 3.2. The thickness of the insulating nut 3.2 is equal to the width between two adjacent resistor strips 1.1.

[0045] This embodiment uses an internal support assembly in the middle of one of the resistor strips in the resistor grid unit. An insulating nut maintains the distance between adjacent resistor strips, effectively isolating them and preventing thermal deformation that could lead to short circuits. Compared to using insulating porcelain for isolation and screws for fixing, this structure eliminates the need for additional insulation between the screws, insulators, and mounting frame.

[0046] Example 3

[0047] Based on Embodiment 1 or Embodiment 2, this embodiment provides an isolation component at the mounting end of the resistor gate, as shown in the attached figure. Figure 1 Appendix Figure 5 To be continued Figure 7 As shown, the isolation assembly 4 includes an isolation insulator 4.1, a connecting insulator 4.2, and a locking insulator 4.3. Each of the isolation insulator, connecting insulator, and locking insulator has a central through hole.

[0048] One end of the isolating insulator 4.1 is provided with a protruding neck 4.1.1 that can be inserted into the mounting hole of the resistor strip 1.1, and the protruding neck is provided with an external thread. The other end of the insulator is provided with a countersunk hole 4.1.2 that is inserted into the protruding neck. One end of the locking insulator 4.3 is provided with a threaded hole 4.3.1 that is threadedly connected to the protruding neck of the isolating insulator 4.1. One end of the connecting insulator 4.2 is provided with a protruding post 4.2.1 that is inserted into the countersunk hole 4.1.2 of the isolating insulator 4.1, and the other end is provided with a threaded post 4.2.2 that is threadedly connected to the threaded hole of the locking insulator 4.3.

[0049] The connecting lugs 1.1.1 of two adjacent resistor grid units of the resistor grid body 1 are isolated by an isolation insulator 4.1, and both ends are fixed to the isolation insulator 4.1 by locking insulators 4.3 and connecting insulators 4.2. The isolation assembly designed in this embodiment allows the isolation insulator to be stably assembled with the resistor grid body into a whole, which facilitates the installation of the mounting screw and reduces the assembly difficulty of the resistor grid and the mounting frame.

[0050] In other embodiments, adjacent isolating insulators are connected by screws, i.e., the protruding neck of the isolating insulator is screwed into the countersunk hole. This method can further achieve stable assembly between the isolating insulator and the resistor grid. Similarly, connecting insulators and isolating insulators can also be connected by threads. The plug-in structure of the isolating insulators in this embodiment can already achieve stable installation of the isolation component and the resistor grid, so there is no need to use screws to increase the additional thread processing cost.

[0051] Furthermore, the isolation assembly also includes a mica tube 4.4, which is disposed in the central through hole of the isolation assembly. The mica tube 4.4 serves to insulate the resistor grid between the mounting screw and the resistor strip during installation, preventing damage to the isolation assembly from causing the resistor strip to become conductive with the mounting screw.

[0052] As attached Figure 1 Or attached Figure 2 As shown, the assembled resistor grid is fixedly installed in the mounting frame 6 through the mica tube 4.4 by the mounting screw 5 to form a new type of resistor for dump truck braking.

[0053] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An assembled resistor grid, characterized in that: Includes the resistor gate body and taps welded to both ends of the top of the resistor gate body; The resistor grid body is formed by welding two resistor grid units arranged in parallel from the same end; The resistor grid unit is formed by welding two symmetrically arranged resistor strips together. The two ends of the resistor strip are respectively provided with connecting lugs that protrude in opposite directions and are parallel to the resistor strip. One end of two adjacent resistor strips are overlapped and welded together through the connecting lugs. The connecting lug plate of the resistor strip is provided with mounting holes.

2. The assembled resistor grid according to claim 1, characterized in that: The mounting hole is a vertical oval hole.

3. The assembled resistor grid according to claim 1, characterized in that: The resistor strip has reinforcing ribs stamped along its length.

4. The assembled resistor grid according to claim 1, characterized in that: The tap is either a side-extending tap or an top-extending tap.

5. The assembled resistor grid according to claim 1, characterized in that: It also includes an inner support assembly, which is disposed on the resistor grid unit and is used to prevent the resistor strip from short-circuiting due to thermal deformation. It consists of an insulating screw and two insulating nuts. One of the resistor strips in the resistor grid unit has a through hole in the middle. The insulating screw passes through the through hole and is fastened at both ends by the insulating nuts. The thickness of the insulating nuts is equal to the width between two adjacent resistor strips.

6. The assembled resistor grid according to claim 5, characterized in that: Both the insulating nut and the insulating screw are made of 95 ceramic.

7. The assembled resistor grid according to any one of claims 1 to 6, characterized in that: It also includes an isolation assembly, which comprises an isolation insulator, a connecting insulator, and a locking insulator, wherein: One end of the isolation insulator is provided with a protruding neck that can be inserted into the mounting hole of the resistor strip, and the protruding neck is provided with an external thread. The other end is provided with a countersunk hole that is inserted into the protruding neck. One end of the locking insulator is provided with a threaded hole that is threadedly connected to the protruding neck of the isolating insulator; One end of the connecting insulator is provided with a protruding post that is inserted into the countersunk hole of the isolating insulator, and the other end is provided with a threaded post that is threaded into the screw hole of the locking insulator. The connecting lugs of two adjacent resistor grid units of the resistor grid body are isolated by an isolation insulator, and both ends are fixed by locking insulators and connecting insulators to the isolation insulators by screws.

8. The assembled resistor grid according to claim 7, characterized in that: The isolation insulator, connecting insulator, and locking insulator are all provided with a central through hole.

9. The assembled resistor grid according to claim 7, characterized in that: The isolation component also includes a mica tube, which is disposed in the central through hole of the isolation component.

10. A novel resistor for braking dump trucks, characterized in that: Includes the assembled resistor grid, mounting frame, and mounting screw as described in claim 9, wherein the assembled resistor grid is fixedly installed in the mounting frame by the mounting screw passing through the mica tube.

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