CN220611976U - Flat cotter pin press-fitting device for railway freight car - Google Patents

Abstract

The utility model relates to a flat cotter pin press-fitting device for a railway wagon, which belongs to the field of railway engineering and comprises a fixed die carrier and a movable sliding block assembly, wherein a movable groove is formed in the fixed die carrier, and the end face of the closed end of the movable groove is provided with a flat hole round pin forming lower semicircular arc; the movable sliding block assembly is arranged in the movable groove in a sliding manner, the movable sliding block assembly comprises a splitting pressure head and a splitting pressure head mounting block, the front end of the splitting pressure head mounting block is provided with an opening semicircular arc to form a flat cotter pin profiling upper semicircular arc, and the flat cotter pin profiling upper semicircular arc and the flat hole round pin profiling lower semicircular arc are spliced together to form an arc. The flat cotter pin press-mounting device for the railway wagon disclosed by the utility model can complete the working procedures of splitting, bending, curling, pressing and the like of the flat cotter pin at one time, and has the advantages of accurate shaping size, controllable assembly quality, convenience in operation and high working efficiency.

Description

Flat cotter pin press-fitting device for railway freight car

Technical Field

The utility model relates to the field of railway engineering, in particular to a flat cotter pin press-fitting device for a railway wagon.

Background

Flat hole round pins are widely adopted as rotating shafts among rotating parts of railway trucks for connection and assembly, and a flat cotter pin is inserted into a flat hole of the flat hole round pins to axially fix the flat hole round pins. In order to prevent the flat cotter pin from loosening and disengaging during operation, after the flat cotter pin is inserted into the square hole of the round pin with the flat hole, two battens of the flat cotter pin need to be split, bent and curled on the cylindrical surface of the round pin with the flat hole during assembly. Because the flat cotter pin is generally large in thickness and wide, under the condition of no professional tool, the operation is carried out manually by a simple tool, the working efficiency is low, the assembly of the flat cotter pin is often imperfect, and the flat cotter pin is easy to loose, abrade, break away or be spread under unexpected stress, so that accidents are caused.

Disclosure of Invention

The utility model aims to solve the problems that the working efficiency is low, the flat cotter pin is often assembled incompletely, loose and easy to wear, break away or unexpected stress expansion is easy to occur, and accidents are caused by the fact that the flat cotter pin is pressed manually by a simple tool under the condition that no special tool exists at present.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model discloses a flat cotter pin press-fitting device for a railway wagon, which comprises:

the fixed die carrier is internally provided with a movable groove, and the end face of the closed end of the movable groove is provided with a flat hole round pin forming lower semicircular arc;

the movable sliding block assembly is arranged in the movable groove in a sliding manner, the movable sliding block assembly comprises a splitting pressure head and a splitting pressure head mounting block, the front end of the splitting pressure head mounting block is provided with an opening semicircular arc to form a flat cotter pin profiling upper semicircular arc, the flat cotter pin profiling upper semicircular arc is a semicircular arc with a notch in the center, the splitting pressure head is arranged at the notch of the center of the flat cotter pin profiling upper semicircular arc and opposite to the flat hole circular pin profiling lower semicircular arc, and the flat cotter pin profiling upper semicircular arc and the flat hole circular pin profiling lower semicircular arc are spliced together to form an arc.

Specifically, the flat cotter pin is formed by turning one slat over 180 degrees, two slats overlapped together at the outer end of the flat cotter pin form a openable end, and the openable end of the flat cotter pin passes through the flat hole round pin to form a workpiece to be machined;

when a workpiece to be machined is inserted into a movable groove of the fixed die frame, the movable slider assembly is continuously pushed, the tip of the splitting pressure head is inserted into the proppable end of the flat cotter pin of the workpiece to be machined, two battens of the flat cotter pin are firstly propped to form an opening, then the tip of the splitting pressure head continuously stretches into the opening of the flat cotter pin to enable the two battens to be bent into an arc shape, and finally the arc shapes of the two battens of the flat cotter pin are subjected to positioning molding by the joint pressing of the lower semicircular arc formed by the flat hole round pin and the upper semicircular arc formed by the flat cotter pin die, so that a finished product after machining is obtained.

Preferably, the head of the splitting press head is provided with a blade to form the tip of the splitting press head and is connected with the main body of the splitting press head through an arc.

Further, the device also comprises an oil cylinder, wherein an oil cylinder mounting seat is arranged at the port of the opening end of the movable groove of the fixed die carrier, and the cylinder body of the oil cylinder is fixedly connected with the oil cylinder mounting seat; and a piston of the oil cylinder penetrates through the oil cylinder mounting seat and is fixedly connected with the splitting pressure head of the movable sliding block assembly.

Further, the semicircular center of the flat cotter pin die of the splitting pressure head mounting block is provided with a circular-angle groove, the bottom of the circular-angle groove is provided with a square groove, and the splitting pressure head is inserted into the square groove of the circular-angle groove.

Further, the splitting press head and the splitting press head mounting block are positioned through a positioning pin.

Further, the left side surface and the right side surface of the splitting press head installation block are respectively outwards protruded to form long strip-shaped sliding rails, the left inner side surface and the right inner side surface of the movable groove of the fixed die carrier are respectively provided with a left sliding rail and a right sliding rail, and the long strip-shaped sliding rails of the left side surface and the right side surface of the splitting press head installation block are respectively arranged in the left sliding rail and the right sliding rail and can do linear motion along the left sliding rail and the right sliding rail.

Further, the fixed die carrier comprises a first die carrier, a second die carrier and the oil cylinder mounting seat, the first die carrier and the second die carrier are U-shaped and respectively comprise a movable notch, the end face of the closed end of the movable notch is provided with a left positioning arc, and the first die carrier and the second die carrier are in butt joint through a plurality of rivets and are mounted on the oil cylinder mounting seat through a pair of bolts;

the left inner side surfaces of the first die frame and the second die frame are respectively provided with a left front step and a left rear step, and the right inner side surfaces of the first die frame and the second die frame are respectively provided with a right front step and a right rear step;

when the first die carrier and the second die carrier are in butt joint and are sealed by the oil cylinder mounting seat, the movable slot openings of the first die carrier and the second die carrier are spliced into a movable slot, and the left positioning circular arcs of the movable slot openings of the first die carrier and the second die carrier are spliced into a flat hole circular pin forming lower semicircular arc; the left front step and the left back step just form a left slideway, the right front step and the right back step just form a right slideway, and the left slideway and the right slideway are mutually parallel.

Further, positioning grooves are respectively formed in the inner sides of the bottoms of the semicircular arcs under the shaping of the flat hole round pins of the second die carrier, the positioning grooves are in the shape of circular arcs and are used for storing non-openable ends of the flat cotter pins, and the non-openable ends are bent ends formed by bending the battens through turnover degrees and are opposite to the openable ends.

Preferably, the movable slider assembly further comprises an elastic buffer member including a rear connection seat, a spring housing, a spring and a front support plate,

the front supporting plate and the rear connecting seat are respectively arranged at the front end and the rear end of the spring box body;

the spring is arranged in the spring box body, and two ends of the spring are respectively abutted against the front supporting plate and the rear connecting seat;

the rear connecting seat is fixedly connected with a piston of the oil cylinder through threads;

the rear end of the splitting pressure head is provided with a flange, the center of the front supporting plate is provided with a flange hole, the rear end of the splitting pressure head penetrates through the center of the splitting pressure head mounting block, the flange at the rear end is inserted into the flange hole in the center of the front supporting plate, and the splitting pressure head mounting block are positioned through a positioning pin.

The utility model adopts the technical proposal and has the following beneficial effects:

according to the flat cotter pin press-mounting device for the railway freight car, the flat cotter pin penetrates through the flat hole round pin to serve as a to-be-machined piece, when the to-be-machined piece is penetrated into the movable groove, the movable slider component is continuously pushed, the tip of the splitting pressure head is inserted into the openable end of the flat cotter pin to be machined, the two battens of the flat cotter pin are firstly spread to form an opening, then the tip of the splitting pressure head continuously stretches into the opening of the flat cotter pin to enable the two battens to be bent into an arc shape, and finally the arc shapes of the two battens of the flat cotter pin are subjected to positioning forming by pressing the lower semicircular arc formed by the flat hole round pin and the upper semicircular arc formed by the flat cotter pin together, so that a finished product after machining is obtained. The flat cotter pin press-mounting device for the railway wagon disclosed by the utility model can complete the working procedures of splitting, bending, curling, pressing and the like of the flat cotter pin at one time, and has the advantages of accurate shaping size, controllable assembly quality, convenience in operation and high working efficiency.

The flat cotter pin press-mounting device for the railway freight car disclosed by the utility model adopts the blade as the tip of the splitting pressure head, uniformly separates and bends two battens of the flat cotter pin, ensures a press-forming die synthesized by a fixed die carrier and a movable slide block component, and does not deviate in the position alignment of the two battens of the flat cotter pin before die assembly and press-forming.

And thirdly, the flat cotter pin press-mounting device for the railway wagon disclosed by the utility model has the advantages that after the splitting of the two battens of the flat cotter pin is completed, the split pressure head enters the groove of the movable slider assembly and is used as a part of the middle press-forming die of the movable slider assembly to participate in the press-forming of the root part of the flat cotter pin, and the split pressure head is pushed out by a spring after the press-forming, so that the flat cotter pin press-mounting device has two functions of splitting and press-forming, and is simple and reliable in structure.

The flat cotter pin press-mounting device for the railway freight car disclosed by the utility model has the advantages that the press-forming circular arcs of the movable sliding block assembly are a plurality of continuous circular arcs, and after the flat cotter pin root battens are formed, reverse circular arcs are formed, so that the flat cotter pin is difficult to remove without special tools, and the device has the functions of preventing accidental opening and theft prevention.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Like parts are designated with like reference numerals throughout the drawings.

Fig. 1 is a three-dimensional view of a flat cotter pin press-fitting device for a railway freight car according to an embodiment of the present utility model;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a top view of FIG. 1;

FIG. 4 is a cross-sectional view taken along A-A of FIG. 3;

FIG. 5 is a front view of FIG. 1;

FIG. 6 is a B-B cross-sectional view of FIG. 5;

fig. 7 is a three-dimensional view of the flat cotter pin press-fitting device for railway freight car provided in embodiment 3 of the present utility model at the beginning of press-fitting of flat cotter pin;

fig. 8 is a front perspective view of the flat cotter pin press-fitting device for railway freight car provided in embodiment 3 of the present utility model at the start of press-fitting of flat cotter pins;

fig. 9 is a sectional view of the flat cotter pin press-fitting device for railway freight car provided in embodiment 3 of the present utility model at the start of press-fitting of the flat cotter pin;

fig. 10 is an isometric view of the flat cotter pin press-fitting device for railway freight car provided in embodiment 3 of the present utility model when the press-fitting of the flat cotter pin is completed;

fig. 11 is a front view of the flat cotter pin press-fitting device for railway freight car provided in embodiment 3 of the present utility model when the press-fitting of the flat cotter pin is completed.

Reference numerals illustrate: 1-a fixed die carrier, 10-a first die carrier, 11-a second die carrier, 12-an oil cylinder mounting seat and 120-a cylinder hole;

2-moving slide block components, 20-splitting pressure heads, 200-cutting edges, 21-splitting pressure head mounting blocks, 210-long sliding rails, 22-spring boxes, 23-rear connecting seats, 24-springs, 25-front supporting plates and 26-positioning pins;

3-oil cylinder, 30-cylinder body, 31-oil nozzle and 32-piston;

101-forming a lower semicircular arc by a flat hole round pin, 102-forming a positioning groove, 103-forming a right front step and 104-forming a right rear step; 201-flat cotter pin profiling upper semicircle, 202-fillet groove, 203-square groove and 204-chamfer;

a-flat cotter pin and B-flat hole round pin.

Detailed Description

Exemplary embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.

In order to meet the assembly quality requirements of the existing railway wagon manufacturing and overhauling work on the flat cotter pin, and in order to improve the working efficiency, a reliable, easy-to-operate and high-efficiency flat cotter pin press-fitting device is needed. Therefore, the utility model provides a flat cotter pin press-mounting device for a railway wagon, wherein a flat cotter pin A penetrates through a flat hole round pin B to be used as a workpiece to be machined, when the workpiece to be machined is penetrated into a movable groove, a movable sliding block assembly 2 is continuously pushed, the tip of a splitting press head 20 is inserted into the openable end of the flat cotter pin A of the workpiece to be machined, two battens of the flat cotter pin A are firstly opened to form openings, then the tip of the splitting press head 20 continuously stretches into the openings of the flat cotter pin A to enable the two battens to be bent into an arc shape, finally, the arc shapes of the two battens of the flat cotter pin A are subjected to positioning forming by the joint pressing of a lower semicircular arc 101 formed by the flat hole round pin and an upper semicircular arc 201 formed by the flat cotter pin, and a finished product after processing is obtained.

It should be noted that, in the present utility model, the "front end" of the movable slider assembly 2 refers to the end where the splitting indenter 20 is located, the "rear end" refers to the end away from the splitting indenter 20, and the "up", "down", "left" and "right" are "up", "down", "left" and "right" based on the attached drawings.

Example 1

Embodiment 1 provides a flat cotter pin press-fitting device for a railway wagon, and the structure thereof is described in detail below with reference to the accompanying drawings.

Referring to fig. 1 to 6, the flat cotter pin press-fitting device for railway freight car at least comprises a fixed die carrier 1 and a movable slider assembly 2.

A movable groove is formed in the fixed die carrier 1, and a flat hole round pin forming lower semicircular arc 101 is formed on the end face of the closed end of the movable groove;

the movable sliding block assembly 2 is arranged in the movable groove in a sliding manner, the movable sliding block assembly 2 comprises a splitting press head 20 and a splitting press head mounting block 21, the front end of the splitting press head mounting block 21 is provided with an opening semicircular arc to form a flat split pin die type upper semicircular arc 201, the flat split pin die type upper semicircular arc 201 is provided with a notch in the center, the splitting press head 20 is arranged at the notch in the center of the flat split pin die type upper semicircular arc 201 and is opposite to the flat hole round pin die type lower semicircular arc 101, and the flat split pin die type upper semicircular arc 201 and the flat hole round pin die type lower semicircular arc 101 are spliced together to form an arc;

the flat cotter pin A is used as a to-be-machined piece through the flat hole round pin B, when the to-be-machined piece is inserted into a movable groove of the fixed die carrier 1, the movable slider assembly 2 is continuously pushed, the tip of the splitting pressure head 20 is inserted into the openable end of the flat cotter pin A to be machined piece, two battens of the flat cotter pin A are firstly opened to form openings, then the tip of the splitting pressure head 20 continues to extend into the openings of the flat cotter pin A to enable the two battens to be bent into an arc shape, and finally the lower semicircular arc 101 formed by the flat hole round pin and the upper semicircular arc 201 formed by the flat cotter pin are pressed together to position and form the arc shapes of the two battens of the flat cotter pin A, so that a finished product after machining is obtained.

The flat cotter pin A is formed by turning one slat by 180 degrees, two slats overlapped together at the outer end of the flat cotter pin A form the openable end, and the openable end penetrates through the flat hole round pin B to form the workpiece to be machined.

The upper semicircular arc 201 of the flat cotter pin die is used for curling and shaping two battens of the openable end of the flat cotter pin A on the outer cylindrical surface of the flat hole round pin B, and the lower semicircular arc 101 of the flat hole round pin die and the upper semicircular arc 201 of the flat cotter pin die jointly realize positioning and curling and shaping of the flat cotter pin A.

In order to improve the splitting efficiency of the splitting indenter 20, the head of the splitting indenter 20 is provided with a blade 200 to form the tip of the splitting indenter 20 and is connected with the main body of the splitting indenter 20 through an arc. In this way, the flat cotter pin A is split into two strips when being pressed, so that the flat cotter pin A is split into two strips.

In order to implement the pushing force for continuously pushing the movable slider assembly 2, in a specific embodiment, the power of the flat cotter pin press-fitting device for the railway wagon adopts a hydraulic control oil cylinder 3, the oil cylinder 3 comprises a cylinder body 30 and a piston 32, the piston 32 is arranged in the cylinder body 30 in a penetrating manner, and a hydraulic oil inlet, namely a nipple 31, is arranged on the cylinder body 30 and is used for inputting hydraulic oil.

Specifically, an oil cylinder mounting seat 12 is arranged at a port of the opening end of the movable groove of the fixed die carrier 1, and a cylinder body 30 of the oil cylinder 3 is fixedly connected with the oil cylinder mounting seat 12; the piston 32 of the oil cylinder 3 passes through the oil cylinder mounting seat 12 and is fixedly connected with the splitting press head 20 of the movable slide block assembly 2. More specifically, the rear connecting seat 23 is fixedly connected with the splitting press 20.

It should be noted that the cylinder 3 is a general hydraulic component, and irrelevant accessories are omitted for convenience of description, and only the cylinder 30, the piston 32, and the oil nozzle 31 are listed as one embodiment of the present utility model. The cylinder 3 may be replaced by other devices with axial thrust.

In order to set the cleaving press head 20, specifically, a rounded groove 202 is set in the center of the semicircular arc 201 on the flat cotter pin die of the cleaving press head mounting block 21, a square groove 203 is set at the bottom of the rounded groove 202, and the cleaving press head 20 is inserted into the square groove 203 of the rounded groove 202.

In the final stage of the pressing, the splitting indenter 20 falls into a square groove 203 of the circular groove 202, and the blade 200 and the circular arc portion of the head of the splitting indenter 20 are combined with the circular groove 202 in the middle of the splitting indenter mounting block 21 to form a bending forming model.

Wherein, square groove 203 is used for accommodating and positioning cleaving press head 20; the rounded grooves 202 and the split ram 20 are combined into a bending forming model for bending the two strips of the spreadable end of the flat split pin a under thrust.

In order to advance and guide the two strips of the longer flat cotter pin A, a chamfer 204 is arranged in the middle of the two ends of the opening of the semicircular arc 201 on the flat cotter pin die, and specifically, the chamfer 204 is respectively arranged at two sides of the split pressure head mounting block 21.

To position the cleaving ram 20, the cleaving ram 20 is positioned with the cleaving ram mounting block 21 by a locating pin 26.

Specifically, a through hole is formed in the middle of the splitting press head mounting block 21 in the vertical direction, a through groove is formed in the vertical direction of the cylinder in the middle of the splitting press head 20, and the through hole and the through groove are used for penetrating the positioning pin 26 to slidably position and limit rotation of the splitting press head 20.

More specifically, the middle part of the splitting press head 20 is a cylinder, and a through groove is radially arranged for matching with a positioning pin 26 to axially position the splitting press head 20; the tail of which extends outwardly to form a flange for insertion into the front support plate 25 for positioning.

In order to limit the linear motion of the splitting indenter 20 in the movable slot of the fixed mold frame 1, the left and right sides of the splitting indenter mounting block 21 are respectively protruded outwards to form a long bar-shaped sliding rail 210, the left and right inner sides of the movable slot of the fixed mold frame 1 are respectively provided with a left sliding rail and a right sliding rail, and the long bar-shaped sliding rails 210 of the left and right sides of the splitting indenter mounting block 21 are respectively arranged in the left sliding rail and the right sliding rail and can linearly move along the left sliding rail and the right sliding rail.

Specifically, the fixed die carrier 1 includes a first die carrier 10, a second die carrier 11 and the hydro-cylinder mount pad 12, the first die carrier 10 and the second die carrier 11 are U-shaped, and all include a movable notch, and the blind end terminal surface of this movable notch is provided with left positioning circular arc, and first die carrier 10 and second die carrier 11 dock through a plurality of rivets to install on hydro-cylinder mount pad 12 through a pair of bolt.

The left inner side surfaces of the first die frame 10 and the second die frame 11 are respectively provided with a left front step and a left rear step, and the right inner side surfaces of the first die frame 10 and the second die frame 11 are respectively provided with a right front step 103 and a right rear step 104;

when the first die carrier 10 and the second die carrier 11 are in butt joint and are closed by the oil cylinder mounting seat 12, the movable notch of the first die carrier 10 and the movable notch of the second die carrier 11 are spliced into a movable groove, and the left positioning circular arcs of the movable notch of the first die carrier 10 and the movable notch of the second die carrier 11 are spliced into a flat hole circular pin forming lower semicircular arc 101; the left front step and the left back step just form a left slideway, the right front step 103 and the right back step 104 just form a right slideway, and the left slideway and the right slideway are mutually parallel.

More specifically, the left front step of the first mold frame 10 and the left rear step of the second mold frame 11 are symmetrically arranged about the butt seam, the right front step 103 of the first mold frame 10 and the right rear step 104 of the second mold frame 11 are symmetrically arranged about the butt seam, and after the first mold frame 10 and the second mold frame 11 are riveted into a whole, the left slide way and the right slide way are respectively formed and serve as positioning slide ways for linear movement of the elongated slide rail 210 of the movable slide block assembly 2.

The first die frame 10 and the second die frame 11 are provided with a plurality of rivet holes for penetrating rivets, and the first die frame 10 and the second die frame 11 are connected together through the rivets; two bolt holes are arranged at the outer ends of the first die carrier 10 and the second die carrier 11 and are used for penetrating bolts, and the first die carrier 10 and the second die carrier 11 which are connected together are installed on the oil cylinder installation seat 12 through a pair of bolts to form a whole.

In order to position the flat cotter pin a, positioning grooves 102 are respectively arranged at the inner sides of the bottoms of the lower semicircular arcs 101 of the flat hole round pin forming of the second die frame 11, the positioning grooves 102 are arc-shaped and are used for storing the non-supportable ends of the flat cotter pin a, wherein the non-supportable ends are bent ends formed by folding a strip by 180 degrees and are opposite to the supportable ends.

The second mold frame 11 has the same shape and geometry as the first mold frame 10 except for the positioning groove 102.

The middle part of the oil cylinder mounting seat 12 is provided with a cylinder body hole 120, and the cylinder body hole 120 is an outer hexagonal inner circular threaded hole and is used for penetrating the cylinder body of the oil cylinder 3. Specifically, the outer wall of the cylinder body of the oil cylinder 3 is provided with external threads, and the cylinder body hole 120 is in threaded connection with the external threads of the cylinder body of the oil cylinder 3;

the two ends of the oil cylinder mounting seat 12 are respectively provided with an upper butt joint and a lower butt joint, two ends of the upper butt joint and the lower butt joint are respectively provided with a connecting column, each connecting column is provided with a bolt hole, the upper ends of the first die frame 10 and the second die frame 11 are respectively provided with a bolt hole, and the lower ends of the first die frame 10 and the second die frame 11 are respectively provided with a bolt hole;

the cylinder body of the oil cylinder 3 passes through a cylinder body hole 120 in the middle of the oil cylinder mounting seat 12, and the cylinder body hole 120 is in threaded connection with external threads of the cylinder body of the oil cylinder 3;

the connecting columns at two ends of the upper butt joint of the oil cylinder mounting seat 12 are respectively connected with the upper ends of the first die frame 10 and the second die frame 11 through bolts;

the connecting columns at two ends of the lower butt joint of the oil cylinder mounting seat 12 are respectively connected with the lower ends of the first die carrier 10 and the second die carrier 11 through bolts.

The mobile slide assembly 2 further comprises an elastic buffer, in particular comprising a rear connection seat 23, a spring box 22, a spring 24 and a front support plate 25,

the front supporting plate 25 and the rear connecting seat 23 are respectively arranged at the front end and the rear end of the spring box 22;

the spring 24 is arranged in the spring box 22, and two ends of the spring are respectively abutted against the front supporting plate 25 and the rear connecting seat 23;

the rear connecting seat 23 is fixedly connected with the piston 32 of the oil cylinder 3 through threads;

the rear end of the splitting press head 20 is provided with a flange, the center of the front support plate 25 is provided with a flange hole, the rear end of the splitting press head 20 penetrates through the center of the splitting press head mounting block 21, the flange at the rear end is inserted into the flange hole at the center of the front support plate 25, and the splitting press head 20 and the splitting press head mounting block 21 are positioned by a positioning pin 26

Wherein the front support plate 25 and the spring 24 are used for providing axial thrust to the splitting press head 20, so that the splitting press head 20 can move forward, and the two strips of the flat split pin A are split first before being pressed.

The rear connecting seat 23 has the same cross section as the rear part of the spring box 22, and is provided with a plurality of through holes at the same position as blind threaded holes at the rear end part of the spring box 22, and screws pass through the through holes to be connected with the spring box 22 into a whole.

In the middle of the rear connecting seat 23 is a cylinder with an internal threaded hole for connecting with the head screw 321 of the piston 32 of the cylinder 3.

In terms of materials, the first die carrier 10, the second die carrier 11 and the cylinder mounting base 12 are all formed by machining steel plates, and the spring box 22, the splitting indenter 20 and the rear connecting base 23 are integrally formed by machining steel materials.

Example 2

Embodiment 2 provides a method for assembling a flat cotter pin press-fitting device for a railway wagon, adopting the flat cotter pin press-fitting device for a railway wagon of embodiment 1, the method comprising the steps of:

step one: aligning rivet holes of the two first die frames 10 and the second die frames 11, and sequentially penetrating rivets to connect the first die frames 10 and the second die frames 11 together;

step two: inserting the cylinder in the middle of the splitting press head 20 into the through hole from the front end of the splitting press head mounting block 21, aligning and communicating the through groove of the cylinder in the middle of the splitting press head 20 with the through hole of the splitting press head mounting block 21, and driving the positioning pin 26 into the through hole to position the splitting press head 20 and the splitting press head mounting block 21;

step three: a front support plate 25 and a spring 24 are sequentially installed from the rear end of the through hole of the spring box 22;

step four: the rear connecting seat 23 is fixed on the rear end surface of the spring box 22 through screws;

step five: loading the strip-shaped sliding rail 210 of the splitting press head mounting block 21 from the left sliding rail and the right sliding rail at the openings of the first die frame 10 and the second die frame 11;

step six: aligning the through holes of the oil cylinder mounting seat 12 with the through holes at the openings of the first die frame 10 and the second die frame 11, and fastening and connecting the through holes into a whole by bolts;

step seven: the screw thread of the cylinder body 30 of the oil cylinder 3 is screwed into the cylinder body hole 120 in the middle of the oil cylinder mounting seat 12 and is fixed through screw thread connection, and the screw thread of the head part of the piston 32 of the oil cylinder 3 is screwed into the screw thread in the cylinder body in the middle of the rear connecting seat 23;

step eight: the nozzle 31 of the oil cylinder 3 is connected with the hydraulic pump station by a high-pressure hose, and after hydraulic oil is introduced into the oil cylinder 3, the piston 32 can push the movable slide block assembly 2 to move forwards.

Example 3

Embodiment 3 provides a working method of a flat cotter pin press-fitting device for a railway wagon, adopting the flat cotter pin press-fitting device for a railway wagon of embodiment 1, referring to fig. 7 to 11, the working method comprising the steps of:

step a: firstly, a flat opening pin A is inserted into a square hole of a flat hole round pin B;

step b: then the flat hole round pin B is inserted into a space in which the flat cotter pin profiling upper semicircular arc 201 and the flat hole round pin profiling lower semicircular arc 101 are spliced together to form an arc shape, and the head of the flat hole round pin B is abutted against the flat hole round pin profiling lower semicircular arc 101;

step c: the head of the flat cotter pin A enters a positioning groove 102 of the fixed die carrier 1, the head of the flat cotter pin is fixed, and at the moment, the lower semicircular arc 101 formed by the flat hole round pin of the fixed die carrier 1 and the cylindrical surface of the flat hole round pin B are abutted;

step d: the pump station is started to output high-pressure oil to the oil cylinder 3, so that the oil cylinder piston 32 pushes the movable slide block assembly 2 to move forwards integrally.

Step e: the cutting edge 210 of the splitting press head 20 of the movable slide block assembly 2 firstly separates two battens of the flat cotter pin A, and the arc at the lower part of the cutting edge 210 is followed to bend the two battens of the flat cotter pin A to two sides;

step f: as the movable slide block assembly 2 moves forward again, the front end of the splitting press head 20 enters the middle setting groove 203 of the flat cotter pin profiling upper semicircular arc 201 of the movable slide block assembly 2 after the spring 24 is compressed;

step g: and the front end of the movable slide block assembly 2 is matched with the fixed die frame 1 for pressurization, and the middle of the movable slide block assembly is coated with the flat hole round pin B and the flat cotter pin A to finish the installation and shape pressing of the flat cotter pin A.

Step h: the oil pump is closed, high-pressure oil flows back, the piston 32 of the oil cylinder 3 moves backwards, and the movable slide block assembly 2 is separated from the fixed die carrier 1.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (10)

1. The utility model provides a flat cotter pin pressure equipment device for railway freight car which characterized in that includes:

a movable groove is formed in the fixed die carrier (1), and a flat hole round pin forming lower semicircular arc (101) is formed in the end face of the closed end of the movable groove;

remove slider subassembly (2), it is in to slide and set up in the movable tank, remove slider subassembly (2) including split pressure head (20) and split pressure head installation piece (21), the front end of split pressure head installation piece (21) is half circular arc on the opening semicircle formation flat cotter mould (201), half circular arc (201) are the notched semicircle in the centre on the flat cotter mould, split pressure head (20) set up half circular arc (201) central breach department on the flat cotter mould, with half circular arc (101) are relative under the flat hole round pin shaping, half circular arc (201) on the flat cotter mould with half circular arc (101) under the flat hole round pin shaping splice together into circular arc jointly.

2. The flat cotter press-fitting device for railway freight car according to claim 1, wherein,

the flat cotter pin (A) is formed by turning one slat by 180 degrees, two slats overlapped together at the outer end of the flat cotter pin (A) form a openable end, and the openable end of the flat cotter pin (A) passes through the flat Kong Yuanxiao (B) to form a to-be-machined piece;

when a workpiece to be machined is inserted into a movable groove of the fixed die frame (1), the movable sliding block assembly (2) is continuously pushed, the tip of the splitting press head (20) is inserted into the openable end of the flat cotter pin (A) of the workpiece to be machined, two battens of the flat cotter pin (A) are firstly opened to form an opening, then the tip of the splitting press head (20) continuously stretches into the opening of the flat cotter pin (A) to enable the two battens to be bent into an arc shape, and finally the arc shapes of the two battens of the flat cotter pin (A) are subjected to positioning forming by the lower semicircular arc (101) formed by the flat hole round pin and the upper semicircular arc (201) formed by the flat cotter pin, so that a finished product after machining is obtained.

3. The flat cotter press-fitting device for railway freight car according to claim 2, wherein,

the head of the splitting press head (20) is provided with a cutting edge (200) to form the tip of the splitting press head (20) and is connected with the main body of the splitting press head (20) through an arc.

4. The flat cotter pin press-fitting device for the railway wagon according to claim 3, further comprising an oil cylinder (3), wherein an oil cylinder mounting seat (12) is arranged at a port of an opening end of a movable groove of the fixed die carrier (1), and a cylinder body (30) of the oil cylinder (3) is fixedly connected with the oil cylinder mounting seat (12); the piston (32) of the oil cylinder (3) penetrates through the oil cylinder mounting seat (12) and is fixedly connected with the splitting press head (20) of the movable slide block assembly (2).

5. The flat cotter press-fitting device for railway freight car according to claim 4, wherein,

the split pressure head mounting block is characterized in that a round corner groove (202) is formed in the center of a flat cotter pin profiling upper semicircular arc (201) of the split pressure head mounting block (21), a square groove (203) is formed in the bottom of the round corner groove (202), and the split pressure head (20) is inserted into the square groove (203) of the round corner groove (202).

6. The flat cotter press-fitting device for railway freight car according to claim 5, characterized in that,

the splitting press head (20) and the splitting press head mounting block (21) are positioned through a positioning pin (26).

7. The flat cotter press-fitting device for railway freight car according to claim 6, characterized in that,

the left side face and the right side face of the splitting pressure head mounting block (21) are respectively outwards protruded to form a long-strip-shaped sliding rail (210), the left inner side face and the right inner side face of the movable groove of the fixed die carrier (1) are respectively provided with a left sliding rail and a right sliding rail, and the long-strip-shaped sliding rails (210) of the left side face and the right side face of the splitting pressure head mounting block (21) are respectively arranged in the left sliding rail and the right sliding rail and can do linear motion along the left sliding rail and the right sliding rail.

8. The flat cotter press-fitting device for railway freight car according to claim 7, wherein,

the fixed die carrier (1) comprises a first die carrier (10), a second die carrier (11) and an oil cylinder mounting seat (12), wherein the first die carrier (10) and the second die carrier (11) are U-shaped and respectively comprise a movable notch, the end face of the closed end of the movable notch is provided with a left positioning arc, and the first die carrier (10) and the second die carrier (11) are in butt joint through a plurality of rivets and are mounted on the oil cylinder mounting seat (12) through a pair of bolts;

the left inner side surfaces of the first die frame (10) and the second die frame (11) are respectively provided with a left front step and a left rear step, and the right inner side surfaces of the first die frame (10) and the second die frame (11) are respectively provided with a right front step (103) and a right rear step (104);

when the first die carrier (10) and the second die carrier (11) are in butt joint and are sealed by the oil cylinder mounting seat (12), the movable notch of the first die carrier (10) and the movable notch of the second die carrier (11) are spliced into a movable groove, and the left positioning circular arcs of the movable notch of the first die carrier (10) and the movable notch of the second die carrier (11) are spliced into a flat hole circular pin forming lower semicircular arc (101); the left front step and the left back step just form a left slideway, the right front step (103) and the right back step (104) just form a right slideway, and the left slideway and the right slideway are mutually parallel.

9. The flat cotter press-fitting device for railway freight car according to claim 8, wherein,

and positioning grooves (102) are respectively formed in the inner side of the bottom of the semicircular arc (101) of the flat hole round pin forming lower semicircular arc of the second die carrier (11), the positioning grooves (102) are arc-shaped and are used for storing the non-supportable ends of the flat cotter pins (A), wherein the non-supportable ends are bent ends formed by folding (180 degrees) of a strip, and the non-supportable ends are opposite to the supportable ends.

10. The flat cotter press-fitting device for railway freight car according to claim 9, wherein,

the movable slide block component (2) also comprises an elastic buffer piece, the elastic buffer piece comprises a rear connecting seat (23), a spring box body (22), a spring (24) and a front supporting plate (25),

the front supporting plate (25) and the rear connecting seat (23) are respectively arranged at the front end and the rear end of the spring box body (22);

the spring (24) is arranged in the spring box body (22), and two ends of the spring are respectively abutted against the front supporting plate (25) and the rear connecting seat (23);

the rear connecting seat (23) is fixedly connected with a piston (32) of the oil cylinder (3) through threads;

the rear end of the splitting press head (20) is provided with a flange, the center of the front support plate (25) is provided with a flange hole, the rear end of the splitting press head (20) penetrates through the center of the splitting press head mounting block (21), the flange at the rear end is inserted into the flange hole in the center of the front support plate (25), and the splitting press head (20) and the splitting press head mounting block (21) are positioned through a positioning pin (26).