Automatic bead pushing and breaking mechanism of movable flash welding machine

Abstract

The utility model belongs to the technical field of railway engineering mechanical equipment manufacturing, and particularly relates to an automatic bead pushing and breaking mechanism of a movable flash welding machine, which comprises a welding machine box body, the welding machine box body comprises a left box body and a right box body, each box body is respectively provided with a bead pushing oil cylinder, the bead pushing oil cylinders are connected with a bead pushing knife assembly, and the bead pushing knife assembly is connected with a bead pushing knife. The welding machine box body is provided with a synchronous connecting rod seat, the synchronous connecting rod seat is connected with a connecting rod, the connecting rod is provided with hinge shaft adjusting assemblies, each hinge shaft adjusting assembly is connected with a pull rod assembly, the pull rod assemblies are connected with a beading pushing knife assembly, and the beading pushing knife assembly comprises five sections of step-shaped blades. By means of the five sections of stepped blades, stepped bead pushing, automatic cutter hanging and automatic bead breaking can be achieved, the needed bead pushing force is small, the cutter rest is not prone to deformation, and the service life is prolonged; and the weld beading can be automatically broken into four sections in the beading pushing process, and cleaning is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of railway engineering machinery and equipment manufacturing, in particular to an automatic nodule pushing and breaking mechanism of a mobile flash welding machine. Background Art

[0002] Currently, railway transportation is predominantly seamless (CWR) rails, and new CWR rails are mostly welded on-site using mobile flash welders. However, with the recent investment and construction boom in domestic railways over the past decade or so, the demand for rail maintenance has steadily increased. Mobile flash welding and normalizing machines (hereinafter referred to as welding and normalizing machines) are increasingly being used for the maintenance of existing rails. While a standard mobile flash rail welder only needs to weld two rail sections, a welding and normalizing machine can perform both rail welding and normalizing heat treatment of the weld seam in a single clamping operation. After flash welding, the weld bead must be removed while still at high temperature. Standard mobile flash welders offer two different bead removal methods: pressure-maintaining and non-pressure-maintaining. A welding and normalizing machine requires a pressure-maintaining bead removal mechanism with automatic knife attachment and automatic bead removal. Because welding and normalizing machines achieve weld bead removal in a single clamping operation, the weld band must be immediately removed and the normalizing machine can then heat treat the weld seam.

[0003] Most on-site rail welding uses a flash welder with a pressure-maintaining and nodule-pushing type. Compared with a flash welder without a pressure-maintaining and nodule-pushing type, a flash welder with a pressure-maintaining and nodule-pushing type can eliminate the influence of the tensile stress in the rail on the weld, and its electrode is not easy to wear. Existing flash welders with a pressure-maintaining and nodule-pushing type all have a set of pressure-maintaining and nodule-pushing devices. For example, the pressure-maintaining and nodule-pushing device of Chinese patent CN201427222Y. This type of nodule-pushing device requires manual hanging of the nodule-pushing knife on the rail in advance, close to the knife holder, and the nodule-pushing cylinder pushes the knife holder, thereby pushing the nodule-pushing knife to complete the function of removing the weld nodule. After the nodule is pushed, the nodule-pushing knife needs to be manually removed from the rail. There are the following problems: (1) Manual hanging of the knife is random, and the rail base material is often damaged and the nodule height on the left and right sides of the rail weld is asymmetrical after the nodule is removed; (2) Manual hanging and removing of the knife is labor-intensive for workers, especially when operated manually under high temperature, which is also easy to cause harm to people; (3) After the nodule-pushing knife edge is worn, it can only be returned to the factory for repair.

[0004] Chinese patent CN201810418746.2 describes a suspended, automatic pressure-maintaining, and abrasion-removing mechanism. This mechanism automatically attaches and removes the blade, eliminating the need for manual intervention. The clearance between the blade and the rail can also be adjusted on-site. However, this type of blade cannot automatically break off the abrasion, and the blade is bolted to the blade holder to adjust the clearance. Summary of the Invention

[0005] In order to solve the above problems existing in the prior art, a mobile flash welding machine automatic nodule pushing and breaking mechanism is proposed, which can realize automatic knife hanging, integration of nodule pushing tool holder and knife body in the narrow space of the welding machine, and realize automatic nodule pushing and breaking.

[0006] To achieve the above technical effects, the technical solutions of this application are as follows:

[0007] An automatic tumor pushing and breaking mechanism of a mobile flash welding machine includes a welding machine case, the welding machine case includes a left case and a right case, each case is respectively equipped with a tumor pushing cylinder, the tumor pushing cylinder is connected to a tumor pushing knife assembly, the welding machine case is equipped with a synchronous connecting rod seat, the synchronous connecting rod seat is connected to a connecting rod, a hinge shaft adjustment assembly is installed on the connecting rod, each hinge shaft adjustment assembly is connected to a pull rod assembly, the pull rod assembly is connected to the tumor pushing knife assembly, the tumor pushing knife assembly includes five sections of stepped blades, the five sections means that the tumor pushing knife assembly includes five blades, and the stepped shape means that all blades of the tumor pushing knife assembly have an inner and outer two-layer structure.

[0008] Furthermore, the tumor-pushing knife assembly includes a top knife holder, a left waist knife holder and a right waist knife holder. The left waist knife holder and the right waist knife holder are connected to the left and right ends of the top knife holder through a pin hinge. A top blade is installed on the top knife holder, a left waist blade is installed on the side of the left waist knife holder, a bottom blade A is installed on the bottom of the left waist knife holder, a right waist blade is installed on the side of the right waist knife holder, and a bottom blade B is installed on the bottom of the right waist knife holder. The top blade, bottom blade A and bottom blade B are in the outer layer, and the left waist blade and the right waist blade are in the inner layer. The outer layer protrudes and the five sections of the inner layer that constitute the integral blade are stepped.

[0009] Furthermore, the lower end of the pull rod assembly is connected to the top tool holder through a hinge shaft.

[0010] Furthermore, the top knife holder and the waist knife holder are hinged to each other, and the hinge hole is a waist-shaped hole.

[0011] Furthermore, the top knife holder in the tumor pushing knife assembly is connected to the pull rod assembly, and the left waist knife holder and the right waist knife holder are connected to the piston rod of the tumor pushing cylinder through an extension rod.

[0012] Furthermore, a connecting rod mounting seat is connected to the synchronous connecting rod seat, and each end of the connecting rod mounting seat is connected to a connecting rod.

[0013] Furthermore, the hinge shaft adjustment assembly includes an adjusting screw, an adjusting nut, a disc spring and a hinge shaft. The connecting screw is sleeved with an adjusting nut on the outside. The bottom of the adjusting screw is connected to the pull rod assembly. A disc spring is arranged between the adjusting screw and the pull rod assembly. The hinge shaft is fixed to the outer side of the upper part of the pull rod assembly.

[0014] Furthermore, the hinge shaft adjustment assembly further includes a pull rod slag stop cover, and the upper end of the pull rod assembly passes through the pull rod slag stop cover and is pressed against the disc spring of the hinge shaft adjustment assembly.

[0015] The advantages of this application are:

[0016] 1. The present application can achieve stepped nodule removal, automatic knife attachment, and automatic nodule cutting through five sections of stepped blades, and the required nodule pushing force is relatively small. This is because the circumference of the rail is divided into four sections by the stepped blades. When the nodule is pushed, i.e., when the welding strip is removed, the top blade and the bottom blade on the outer layer of the stepped blade first contact the welding strip. At this time, the nodule pushing force on the tool holder is only the force of the welding strip at the top blade and the bottom blade; after the outer blade removes and cuts the welding strip, the left and right waist blades on the inner layer of the stepped blade contact the welding strip. At this time, the nodule pushing force on the tool holder is only the force of the welding strip at the left and right waist blades. The stepped blade structure divides the force of the entire welding strip of the circumference of the traditional rail into two parts, so the nodule pushing force on the tool holder becomes smaller.

[0017] 2. The tool holder of the present application is not easy to deform, which increases the service life; and the weld nodule can be automatically broken into four sections during the nodule pushing process. The top blade, bottom blade A and bottom blade B are on the outer layer, and the left waist blade and right waist blade are on the inner layer. The outer blade contacts the welding strip first and pushes the nodule first, which divides the welding strip into upper and lower sections. Then the inner welding strip is cut by the left and right waist blades into left and right sections, forming four sections of welding strips, upper, lower, left and right. The lower section of the welding strip is at the bottom and falls off from the rail directly, leaving the broken upper, left and right welding strips on the rail that can be easily hooked off by a slag shovel for convenient cleaning. The previous nodule pushing knife was not stepped, and the entire nodule pushing knife was on the same plane, so it could not cut the welding strip. The pushed-down welding strip was an overall circular ring, and it was necessary to manually pry the welding strip off with a crowbar, and then pry it and bend it according to the shape of the rail cross section before it could be removed from the rail. At this time, the welding strips are in a high temperature state, and manual operation has certain risks.

[0018] 3. The tool holder and blade of this application adopt an integrated structure, ensuring the removal and removal of tumors in the confined space of the welding machine; the quality of tumor removal is stable and reliable. This integrated structure is in contrast to the traditional tumor removal knife assembly, which consists of two separate components: the tool holder and the tumor removal knife. The tool holder assembly is connected to the extended rod of the tumor removal cylinder piston. The tumor removal knife assembly is manually placed against the end face of the tool holder. The tumor removal cylinder pushes the tool holder and the tumor removal knife assembly to achieve tumor removal. To ensure a strong tumor removal force during the tumor removal process and the function of manually hanging the tumor removal knife, the tool holder and the tumor removal knife assembly require high strength. The tumor removal knife requires more mechanisms to open and close the tumor removal knife, resulting in a larger overall size and less compactness. The automatic knife hanging mechanism utilizes the clamping function of the clamping mechanism itself to achieve automatic opening and closing of the tumor removal knife holder, eliminating the need for additional mechanisms. The blades are made of several separate pieces and mounted on the tool holder via a pin to achieve automatic opening and closing of the tumor removal knife. The blades are smaller in size and do not require additional mechanisms. They are integrated into the tool holder to achieve the tumor removal function.

[0019] 4. The entire pressure-maintaining, tumor-pushing and tumor-breaking mechanism of the present application has a simple and compact structure and high cost-effectiveness.

[0020] 5. The structure of this application is applicable to the pressure-maintaining and nodule-pushing of most mobile flash rail welding machines. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of this application.

[0022] Figure 2 Schematic diagram of the hinge shaft adjustment component structure.

[0023] Figure 3 This is a schematic diagram of the front structure of this application.

[0024] Figure 4 for Figure 3 AA cross-sectional view.

[0025] Figure 5 This is a schematic diagram showing the structure of the tumor removal knife assembly.

[0026] Figure 6 This is a schematic diagram of the stepped structure of the tumor-pushing knife assembly.

[0027] In the accompanying drawings: 1-synchronous connecting rod seat, 2-connecting rod mounting seat, 3-connecting rod, 4-hinge shaft adjustment assembly, 5-knife pusher assembly, 6-pull rod assembly, 7-rail, 41-adjusting screw, 42-adjusting nut, 43-disc spring, 44-hinge shaft, 45-pull rod slag cover, 8-extension rod, 9-knife pusher cylinder, 51-top blade, 52-right waist blade holder, 53-right waist blade, 54-bottom blade B, 55-bottom blade A, 56-left waist blade, 57-left waist blade holder, 58-top blade holder. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0031] In the description of this application, it should be noted that the terms "upper," "vertical," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the application is typically placed when in use, or are the orientations or positional relationships commonly understood by those skilled in the art. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0033] Example 1

[0034] like Figure 1 、 Figure 3 and Figure 4As shown, an automatic tumor pushing and breaking mechanism of a mobile flash welding machine includes a welding machine case, the welding machine case includes a left case and a right case, each case is respectively equipped with a tumor pushing cylinder 9, the tumor pushing cylinder 9 is connected to the tumor pushing knife assembly 5, the welding machine case is equipped with a synchronous connecting rod seat 1, the synchronous connecting rod seat 1 is connected to the connecting rod 3, the connecting rod 3 is equipped with a hinge adjustment assembly 4, each hinge adjustment assembly 4 is connected to a pull rod assembly 6, the pull rod assembly 6 is connected to the tumor pushing knife assembly 5, the tumor pushing knife assembly 5 includes five sections of stepped blades, the five sections mean that the tumor pushing knife assembly 5 includes five blades, and the stepped shape means that all blades of the tumor pushing knife assembly 5 have an inner and outer two-layer structure. The present application uses five stepped blades to achieve stepped tumor removal, automatic blade attachment, and automatic tumor cutting, and requires less tumor pushing force. This is because the circumference of the rail 7 is divided into four sections by the stepped blades. When the tumor is first pushed, i.e., when the welding strip is removed, the top blade 51 and the bottom blade on the outer layer of the stepped blades first contact the welding strip. At this time, the tumor pushing force on the tool holder is only the force of the welding strip at the top blade 51 and the bottom blade; after the outer blade removes and cuts the welding strip, the left and right waist blades 53 on the inner layer of the stepped blades contact the welding strip. At this time, the tumor pushing force on the tool holder is only the force of the welding strip at the left and right waist blades 53. The stepped blade structure divides the force of the entire welding strip of the circumference of the traditional rail 7 into two parts, so the tumor pushing force on the tool holder is reduced.

[0035] Example 2

[0036] like Figure 1 、 Figure 3 and Figure 4 As shown, an automatic tumor pushing and breaking mechanism of a mobile flash welding machine includes a welding machine case, which includes a left case and a right case, and each case is respectively equipped with a tumor pushing cylinder 9, which is connected to a tumor pushing knife assembly 5, and a synchronous connecting rod seat 1 is installed on the welding machine case, which is connected to a connecting rod 3, and a hinge adjustment assembly 4 is installed on the connecting rod 3, each hinge adjustment assembly 4 is connected to a pull rod assembly 6, and the pull rod assembly 6 is connected to the tumor pushing knife assembly 5, and the tumor pushing knife assembly 5 includes five sections of stepped blades, and the five sections mean that the tumor pushing knife assembly 5 includes five blades, and the stepped shape means that all blades of the tumor pushing knife assembly 5 have an inner and outer two-layer structure.

[0037] like Figure 5 and Figure 6As shown, the tumor-pushing knife assembly 5 includes a top knife holder 58, a left waist knife holder 57 and a right waist knife holder 52. The left waist knife holder 57 and the right waist knife holder 52 are connected to the left and right ends of the top knife holder 58 by a pin hinge. A top blade 51 is installed on the top knife holder 58 through a pin. A left waist blade 56 is installed on the side of the left waist knife holder 57 through a pin. A bottom blade A55 is installed on the bottom of the left waist knife holder 57 through a pin. A right waist blade 53 is installed on the side of the right waist knife holder 52 through a pin. A bottom blade B54 is installed on the bottom of the right waist knife holder 52 through a pin. The top blade 51, bottom blade A55 and bottom blade B54 are in the outer layer, and the left waist blade 56 and the right waist blade 53 are in the inner layer. The outer layer protrudes and the five sections of the inner layer that constitute the integral blade are stepped.

[0038] The present application uses five stepped blades to achieve stepped tumor removal, automatic blade attachment, and automatic tumor cutting, and requires less tumor pushing force. This is because the circumference of the rail 7 is divided into four sections by the stepped blades. When the tumor is first pushed, i.e., when the welding strip is removed, the top blade 51 and the bottom blade on the outer layer of the stepped blades first contact the welding strip. At this time, the tumor pushing force on the tool holder is only the force of the welding strip at the top blade 51 and the bottom blade; after the outer blade removes and cuts the welding strip, the left and right waist blades 53 on the inner layer of the stepped blades contact the welding strip. At this time, the tumor pushing force on the tool holder is only the force of the welding strip at the left and right waist blades 53. The stepped blade structure divides the force of the entire welding strip of the circumference of the traditional rail 7 into two parts, so the tumor pushing force on the tool holder is reduced.

[0039] The tool holder of the present application is not easy to deform, which increases the service life; and the weld nodule can be automatically broken into four sections during the nodule pushing process. The top blade 51, bottom blade A55 and bottom blade B54 are on the outer layer, and the left waist blade 56 and right waist blade 53 are on the inner layer. The outer blades first contact the welding strip and push the nodule, thereby dividing the welding strip into two upper and lower sections. Then, the inner welding strip is cut by the left and right waist blades 53 into two left and right sections, thus forming four sections of welding strip, the upper, left and right sections. The lower section of welding strip is at the bottom and directly falls off from the rail 7, leaving the broken upper, left and right welding strips on the rail 7, which can be easily hooked off by a slag shovel and easily cleaned. The previous nodule pushing knife was not stepped, and the entire nodule pushing knife was on the same plane, so it could not cut the welding strip. The pushed welding strip was an overall circular ring, and it was necessary to manually pry the welding strip off with a crowbar, and then pry it and bend it according to the shape of the cross section of the rail 7 before it could be removed from the rail 7. At this time, the welding strip is in a high temperature state, and manual operation has certain risks.

[0040] The tool holder and blade of the present invention adopt an integrated structure, ensuring the removal and removal of tumors within the confined space of the welding machine. The removal quality is stable and reliable. This integrated design contrasts with the traditional tumor removal blade assembly 5, which consists of two separate components: the tool holder and the tumor removal blade. The tool holder assembly is connected to the tumor removal cylinder 9 by a piston extension rod 8. The tumor removal blade assembly 5 is manually placed against the end face of the tool holder. The tumor removal cylinder 9 pushes the tool holder and the tumor removal blade assembly 5 to remove the tumor. To ensure a strong tumor removal force during the removal process and the manual removal function of the tumor removal blade, the tool holder and the tumor removal blade assembly 5 require high strength. The tumor removal blade requires more mechanisms to open and close the tumor removal blade, resulting in a larger overall size and less compactness. The automatic blade hanging mechanism utilizes the clamping function of the clamping mechanism itself to automatically open and close the tumor removal blade holder, eliminating the need for additional mechanisms. The blade is made of several separate pieces and mounted to the tool holder via a pin to automatically open and close the tumor removal blade. The blade is smaller in size and does not require additional mechanisms. It is integrated into the tool holder to achieve the tumor removal function.

[0041] The lower end of the pull rod assembly 6 is connected to the top tool holder 58 via a hinge shaft 44 .

[0042] The top knife holder 58 and the waist knife holder are hinged to each other, and the hinged hole is a waist-shaped hole.

[0043] The top knife holder 58 in the tumor-pushing knife assembly 5 is connected to the pull rod assembly 6 , and the left waist knife holder 57 and the right waist knife holder 52 are connected to the piston rod of the tumor-pushing oil cylinder 9 through the extension rod 8 .

[0044] The synchronous connecting rod seat 1 is connected to a connecting rod 3 mounting seat, and each end of the connecting rod 3 mounting seat is connected to a connecting rod 3.

[0045] like Figure 2 As shown, the hinge shaft adjustment assembly 4 includes an adjustment screw 41, an adjustment nut 42, a disc spring 43 and a hinge shaft 44. The link screw is sleeved with an adjustment nut 42 on the outside. The bottom of the adjustment screw 41 is connected to the pull rod assembly 6. A disc spring 43 is provided between the adjustment screw 41 and the pull rod assembly 6. The hinge shaft 44 is fixed to the outer side of the upper part of the pull rod assembly 6. The hinge shaft adjustment assembly 4 also includes a pull rod slag stop cover 45. The upper end of the pull rod assembly 6 passes through the pull rod slag stop cover 45 and is pressed against the disc spring 43 of the hinge shaft adjustment assembly 4.

[0046] Example 3

[0047] The tumor-pushing tool holder and blade integration technology is used. The tumor-pushing tool holder is divided into a top tool holder 58, a left waist tool holder 57, and a right waist tool holder 52. The left and right waist tool holders 52 are connected to the top tool holder 58 through a pin hinge. The tumor-pushing tool body is divided into five sections and is mounted on the tool holder in a stepped manner through a pin. The top blade 51, bottom blade A55, and bottom blade B54 are on the upper layer. The left and right waist blades 53 are embedded in the left and right waist tool holders 52. The entire cutting edge is connected to form the shape of a cross section of the rail 7 and wraps around the circumference of the rail 7. The stepped installation method ensures that the welding strip is automatically cut into several sections during the tumor-pushing process, which is convenient for quick cleaning of the welding strip. The integrated structure of the tool holder and blade meets the requirements for pushing and cutting tumors in the narrow space of the welding machine. When the cutting edge is worn, only the blade can be replaced, which has a high overall cost-effectiveness.

[0048] An automatic nodule pushing and breaking mechanism of a mobile flash welding machine includes a welding machine case, which includes a left case and a right case. A nodule pushing cylinder 9 is installed on each case. The piston rod of the nodule pushing cylinder 9 is connected to the nodule pushing knife assembly 5 through an extension rod 8. The nodule pushing knife assembly 5 opens and closes as the left and right cases are opened and closed; a synchronous connecting rod seat 1 is installed on the welding machine case, and the synchronous connecting rod seat 1 is connected to the connecting rod 3. A hinge shaft adjustment assembly 4 is installed on the connecting rod 3. The hinge shaft adjustment assembly 4 includes a disc spring 43 and an adjusting nut 42, a pull rod slag cover 45, etc.

[0049] The lower end of the pull rod assembly 6 is connected to the top tool holder 58 through the hinge shaft 44, and the upper end of the pull rod passes through the pull rod slag cover 45 and is pressed against the disc spring 43 of the hinge shaft adjustment assembly 4. The hole through which the top tool holder 58 is hinged to the waist tool holder is a waist-shaped hole. When the tool holder is positioned on the rail 7 as the box body opens, the pull rod is disengaged from the disc spring 43, the top tool holder 58 floats upward, and the lower end position of the waist-shaped hole positions the top tool and ensures that the top tool does not interfere with the rail 7. When the tool holder is closed with the box body and clamps the rail 7, the pull rod contacts the disc spring 43, and the top tool holder 58 floats downward under the action of the disc spring 43 force, and the upper end position of the waist-shaped hole positions the top tool, ensuring that the distance between the top tool edge and the rail 7 remains constant, thereby ensuring that the thickness of the push knob meets the standard.

Claims

1. An automatic nodule pushing and breaking mechanism for a mobile flash welding machine, comprising a welding machine housing, characterized in that: The welding machine housing comprises a left housing and a right housing, each housing being provided with a tumor-pushing oil cylinder (9), the tumor-pushing oil cylinder (9) being connected to the tumor-pushing knife assembly (5), the welding machine housing being provided with a synchronous connecting rod seat (1), the synchronous connecting rod seat (1) being connected to the connecting rod (3), the connecting rod (3) being provided with a hinge shaft adjustment assembly (4), each hinge shaft adjustment assembly (4) being connected to a pull rod assembly (6), the pull rod assembly (6) being connected to the tumor-pushing knife assembly (5), the tumor-pushing knife assembly (5) comprising five sections of stepped blades, the five sections referring to the tumor-pushing knife assembly (5) comprising five blades, and the stepped shape referring to the fact that all blades of the tumor-pushing knife assembly (5) are in an inner and outer two-layer structure.

2. The automatic push-pull and break mechanism of a mobile flash welding machine according to claim 1, characterized in that: The tumor-pushing knife assembly (5) comprises a top knife holder (58), a left waist knife holder (57) and a right waist knife holder (52), wherein the left waist knife holder (57) and the right waist knife holder (52) are connected to the left and right ends of the top knife holder (58) by means of a pin hinge, a top blade (51) is mounted on the top knife holder (58), a left waist blade (56) is mounted on the side of the left waist knife holder (57), a bottom blade A (55) is mounted on the bottom of the left waist knife holder (57), a right waist blade (53) is mounted on the side of the right waist knife holder (52), and a bottom blade B (54) is mounted on the bottom of the right waist knife holder (52), the top blade (51), the bottom blade A (55) and the bottom blade B (54) are on the outer layer, the left waist blade (56) and the right waist blade (53) are on the inner layer, and the outer layer protrudes and forms five sections of the integral blade with the inner layer in a stepped shape.

3. The automatic push and break mechanism of a mobile flash welding machine according to claim 2, characterized in that: The lower end of the pull rod assembly (6) is connected to the top tool holder (58) via a hinge shaft (44).

4. The automatic tire pusher and tire cutter mechanism of a mobile flash welding machine according to claim 2, characterized in that: The top knife holder (58) is hinged to each other with the waist knife holder, and the hinged hole is a waist-shaped hole.

5. The automatic tire pusher and tire cutter mechanism of a mobile flash welding machine according to claim 2, characterized in that: The top knife holder (58) in the tumor pushing knife assembly (5) is connected to the pull rod assembly (6), and the left waist knife holder (57) and the right waist knife holder (52) are connected to the piston rod of the tumor pushing cylinder (9) through the extension rod (8).

6. The automatic tire pusher and tire cutter mechanism of a mobile flash welding machine according to claim 1, characterized in that: The synchronous connecting rod seat (1) is connected to a connecting rod (3) mounting seat, and each end of the connecting rod (3) mounting seat is connected to a connecting rod (3).

7. The automatic tire pusher and tire cutter mechanism of a mobile flash welding machine according to claim 1, characterized in that: The hinge shaft adjustment assembly (4) includes an adjustment screw (41), an adjustment nut (42), a disc spring (43) and a hinge shaft (44). The adjustment screw (41) is sleeved with an adjustment nut (42) on the outside. The bottom of the adjustment screw (41) is connected to the pull rod assembly (6). A disc spring (43) is provided between the adjustment screw (41) and the pull rod assembly (6). The hinge shaft (44) is fixed to the outer side of the upper part of the pull rod assembly (6).

8. The automatic tire pusher and tire cutter mechanism of a mobile flash welding machine according to claim 7, characterized in that: The hinge shaft adjustment assembly (4) further comprises a pull rod slag blocking cover (45), and the upper end of the pull rod assembly (6) passes through the pull rod slag blocking cover (45) and is pressed against the disc spring (43) of the hinge shaft adjustment assembly (4).

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