A small rail weld grinding machine

Abstract

The present invention relates to a railway line maintenance and repair device, in particular to a small rail weld grinding machine. A small rail weld grinding machine includes a sand belt grinding machine, a front swing arm, an upper swing arm, and a rail clamping mechanism. One end of the upper swing arm is hinged to the rail clamping mechanism, and the other end is hinged to the front swing arm. One end of the front swing arm is hinged to the upper swing arm, and the other end is connected to the sand belt grinding machine. The rail clamping mechanism includes a reversing seat, a sliding seat, and a rail clamp. One end of the upper swing arm is hinged to the reversing seat through a horizontal pin shaft and the angular position is locked by an upper swing arm knob plunger. The reversing seat and the sliding seat are hinged through a vertical steering pin and the angular position is locked by a reversing knob plunger. The present invention is very convenient when changing the direction to grind the other side of the rail after grinding one side of the rail, and can grind the weld chamfer.

Description

Technical Field

[0001] The present invention relates to a railway line maintenance and repair device, and more particularly to a small rail weld grinding machine. Background Art

[0002] Patent document CN111172829A discloses a railway rail weld abrasive belt grinding device, which includes a grinding mechanism, a position adjusting mechanism and a rail clamping mechanism. The device is convenient to disassemble and assemble, the grinding angle and range can be freely adjusted, and it is easy to carry. However, after grinding one side of the rail, the device needs to be disassembled from the rail and turned around to grind the other side of the rail, which is very inconvenient to operate. In addition, the device can only grind the surface of the rail parallel to the longitudinal direction of the rail, and cannot grind the weld chamfer at an angle to the longitudinal direction of the rail. Summary of the Invention

[0003] Aiming at the technical defects of inconvenient turning when grinding both sides of the rail and inability to grind the weld chamfer in the prior art, the present invention provides a small rail weld grinding machine that is more convenient to operate and can grind the weld chamfer.

[0004] The present invention is realized by the following technical solutions:

[0005] A small rail weld grinding machine includes a belt grinding machine, a front swing arm, an upper swing arm and a rail clamping mechanism. One end of the upper swing arm is hinged to the rail clamping mechanism, and the other end is hinged to the front swing arm. One end of the front swing arm is hinged to the upper swing arm, and the other end is connected to the belt grinding machine. The belt grinding machine includes a driving wheel assembly, an elastic support mechanism, a working wheel assembly, an abrasive belt and a roller positioning mechanism. The abrasive belt is sleeved on the driving wheel assembly and the working wheel assembly, and the driving wheel assembly and the working wheel assembly are tensioned by the elastic support mechanism.

[0006] Preferably, the elastic support mechanism includes an elastic support seat, a guide rod, an auxiliary guide rod, a tension spring, a tension nut and a quick telescopic mechanism. The guide rod and the auxiliary guide rod are parallel to each other and are both fixedly connected to the elastic support seat, and are slidably connected to the driving wheel assembly. The tension spring is located between the elastic support seat and the driving wheel assembly and is sleeved on the guide rod.

[0007] Preferably, the rail clamping mechanism includes a reversing seat, a sliding seat and a rail clamp. The rail clamp and the sliding seat are connected by two linear bearings and locked with a handle. One end of the upper swing arm is hinged to the reversing seat through a horizontal pin shaft, and the reversing seat and the sliding seat are hinged through a vertical pin shaft. The sliding seat is provided with 3 positioning holes on both sides of the vertical pin shaft, and the reversing seat is provided with a reversing knob plunger that can be inserted into the positioning hole for position locking beside the vertical pin shaft.

[0008] Preferably, it further includes a roller positioning mechanism fixedly connected to the elastic support mechanism. The positioning mechanism includes a positioning seat, a flipping arm, a positioning wheel, a pin locking mechanism, and a ball head plunger. The flipping arm is installed in the card slot of the positioning seat. The positioning wheel is installed at the front end of the flipping arm. The rear end of the flipping arm is hinged to the positioning seat. A pin locking mechanism is installed in front of the hinge shaft of the positioning seat, and a ball head plunger is installed behind the hinge shaft. Locking holes for the pin locking mechanism and the ball head plunger are respectively provided on both sides of the hinge shaft of the flipping arm.

[0009] Preferably, a quick telescoping mechanism is provided at one end of the elastic support seat where the working wheel assembly is arranged. The quick telescoping mechanism includes a tensioning handle, a tensioning connecting rod, a telescoping rod, a locking wrench, and an elastic pin. The telescoping rod is slidably connected to the elastic support seat and fixedly connected to the working wheel assembly. The middle part of the elastic support seat has a groove. A tensioning handle is hinged in the groove. A tensioning connecting rod is respectively hinged to the telescoping rod and the tensioning handle. The elastic support seat is provided with a locking wrench for locking the tensioning handle. An elastic pin is fixed on the telescoping rod, and both ends of the elastic pin are installed in the sliding grooves of the elastic support seat.

[0010] Preferably, the elastic support seat is provided with a groove for the abrasive belt to pass through. A front handle is installed on the elastic support seat for the operator to hold with the left hand. A rear handle is fixed on the motor seat for the operator to hold with the right hand. The rear handle is provided with a power switch and a switch locking button.

[0011] Preferably, the upper swing arm is provided with a swing angle adjustment plate. The swing angle adjustment plate is installed beside the hinge shaft of the upper swing arm and the commutation seat, and two positioning holes are provided along the circumferential direction of the hinge shaft. The commutation seat is provided with an upper swing arm knob plunger that can be inserted into the positioning hole for position locking beside the hinge shaft.

[0012] Preferably, the arm bodies of the upper swing arm and the front swing arm are both of integral structure and are provided with weight reduction grooves.

[0013] Preferably, the power wheel assembly includes a motor, a motor seat, and a driving wheel. The driving wheel is of a cylindrical structure, sleeved on the motor and connected to the motor output shaft. The middle part of the motor is of a flange structure, and the end with the driving wheel is installed in the cavity of the motor seat. Grooves are provided on the outer surface of the driving wheel, and the abrasive belt is stuck in the grooves. The outer surface of the working wheel in the working wheel assembly is of a multi-ring groove structure.

[0014] Preferably, it further includes a front protective cover and a rear protective cover. The front protective cover is installed on the front handle, and the rear protective cover is installed on the motor seat.

[0015] With the above technical solutions, after one side of the rail is polished, the abrasive belt grinding machine is lifted, and the upper swing arm and the reversing seat are rotated 180 degrees around the mounting base, so that the other side of the rail can be polished without removing the rail clamping mechanism from the rail. Therefore, the operation is very convenient. In addition, when the weld chamfer needs to be polished, only the upper swing arm and the reversing seat need to be rotated by a certain angle around the sliding seat to perform the operation.

[0016] Since the positioning mechanism is added in the present invention, it can provide a working reference for the abrasive belt, play a role of profiling and positioning, control the remaining height of the grinding object, and improve the flatness of the grinding surface.

[0017] Since the elastic support mechanism is added in the present invention, a linkage mechanism can be formed by the tensioning handle, the tensioning link and the extension rod. By operating the tensioning handle, the extension rod can be extended or contracted, which is convenient for replacing the abrasive belt and tensioning the abrasive belt. It is much more convenient and faster than adjusting the length of the lead screw. Brief Description of the Drawings

[0018] Figure 1 is a schematic structural view of the small rail weld grinding machine described in the present invention.

[0019] Figure 2 is a schematic structural view of the small rail weld grinding machine described in the present invention when the direction is changed.

[0020] Figure 3 is a schematic working view of the small rail weld grinding machine described in the present invention when performing weld chamfer grinding.

[0021] Figure 4 is a schematic view of the use state of the positioning mechanism of the abrasive belt grinding machine described in the present invention.

[0022] Figure 5 is a schematic working view of the small rail weld grinding machine described in the present invention when performing rail bottom weld grinding.

[0023] Figure 6 is a partial cross-sectional view of the abrasive belt grinding machine described in the present invention.

[0024] Figure 7 is a structural view of the abrasive belt grinding machine described in the present invention.

[0025] Figure 8 is an exploded view of the abrasive belt grinding machine described in the present invention. Detailed Embodiments

[0026] The following further describes the present invention in conjunction with the drawings and specific embodiments.

[0027] As Figures 1 - 8As shown in the figure, a small rail weld grinding machine includes a sand belt grinding machine 1, a front swing arm 2, an upper swing arm 3, and a rail clamping mechanism 4. One end of the upper swing arm 3 is hinged to the rail clamping mechanism 4, and the other end is hinged to the front swing arm 2. One end of the front swing arm 2 is hinged to the upper swing arm 3, and the other end is threadedly connected to the sand belt grinding machine 1. The sand belt grinding machine 1 includes a driving wheel assembly 1.1, an elastic support mechanism 1.2, a working wheel assembly 1.3, a sand belt 1.4, and a roller positioning mechanism 1.5. The sand belt 1.4 is sleeved on the driving wheel assembly 1.1 and the working wheel assembly 1.3, and the driving wheel assembly 1.1 and the working wheel assembly 1.3 are tensioned by the elastic support mechanism 1.2. The upper swing arm 3 is provided with a swing angle adjustment plate, and the swing angle adjustment plate is installed beside the hinge shaft of the upper swing arm 3 and the reversing seat 4.1, and two positioning holes are provided along the circumferential direction of the hinge shaft. The reversing seat 4.1 is provided with an upper swing arm knob plunger 4.1.2 beside the hinge shaft that can be inserted into the positioning hole for position locking.

[0028] As Figure 2 shown in the figure, after grinding one side of the rail, lift the sand belt grinding machine 1, and rotate the upper swing arm 3 and the reversing seat 4.1 relative to the sliding seat 4.2 at the pin shaft 4.1.1, which can drive the sand belt grinding machine 1 to rotate 180° and then grind the weld on the opposite side of the rail.

[0029] As Figure 2 shown in the figure, three positioning holes 4.2.1 are provided on each side of the pin shaft 4.1.1 on the sliding seat 4.2. The reversing seat 4.1 is provided with a reversing knob plunger 4.1.2 beside the pin shaft 4.1.1 that can be inserted into the positioning hole for position locking, which can lock the rotation angle of the reversing seat 4.1 to meet the needs of different grinding operations. The middle positioning hole is used for the grinding operation of the front height of the weld, and the positioning holes on both sides are used for the chamfering grinding operation of the weld reinforcement transition, that is, after the weld height grinding is in place, rotate the reversing seat 4.1 to the positioning holes on both sides. At this time, the sand belt grinding machine deflects a small angle, and the two sides of the weld reinforcement can be chamfered and ground to meet the requirement of smooth transition between the weld and the rail base metal.

[0030] As Figure 2 、 Figure 4 、 Figure 5 shown in the figure, the upper swing arm 3 is provided with a swing angle adjustment plate 3.1. The swing angle adjustment plate 3.1 is installed beside the hinge shaft of the upper swing arm 3 and the reversing seat 4.1, and two positioning holes 3.1.1 are provided along the circumferential direction of the hinge shaft. The reversing seat 4.1 is provided with an upper swing arm knob plunger 4.1.3 beside the hinge shaft that can be inserted into the positioning hole for position locking. As Figure 5As shown, when the upper swing arm knob plunger 4.1.3 is positioned with the lower positioning hole of the swing angle adjustment plate 3.1, the welds at the web, upper surface of the rail base, and side surface of the rail base can be ground. When the upper swing arm knob plunger 4.1.2 is positioned with the upper positioning hole of the swing angle adjustment plate 3.1, that is, when the upper swing arm 3 is deflected downward relative to the rail clamping mechanism 4, the front swing arm 2 and the abrasive belt grinding machine 1 as a whole are correspondingly offset downward, and the welds at the rail base can be ground. Since the upper swing arm 3 is in a fixed state during the grinding operation at each grinding position of the rail weld, a stable fulcrum is provided for the front swing arm 2 and the abrasive belt grinding machine 1, making the grinding operation labor-saving and conducive to improving the grinding quality and efficiency.

[0031] As Figure 2 shown, the rail clamping mechanism 4 includes a reversing seat 4.1, a sliding seat 4.2, and a rail clamp 4.3. The rail clamp 4.3 and the sliding seat 4.2 are connected by two linear bearings and locked with a star-shaped threaded handle 4.3.1. The rail clamp 4.3 adopts a C-shaped integral clamping seat, and the clamping seat and the entire device are clamped to the rail with a T-shaped screw rod. After the rail clamp 4.3 is clamped and fixed on the rail, the sliding seat 4.2 can move through the linear bearings, which can conveniently adjust the relative position between the abrasive belt grinding machine 1 and the weld, avoid interference between the grinding device and the sleeper, and the position can also be locked with a star-shaped threaded handle 4.4 as needed.

[0032] As Figure 6 shown, the elastic support mechanism 1.2 includes an elastic support seat 1.2.1, a guide rod 1.2.2, an auxiliary guide rod 1.2.3, a tension spring 1.2.4, a tension nut 1.2.5, and a quick telescoping mechanism 1.2.6. The guide rod 1.2.2 and the auxiliary guide rod 1.2.3 are parallel to each other and are both fixedly connected to the elastic support seat 1.2.1 and slidably connected to the power wheel assembly 1.1. The tension spring 1.2.4 is located between the elastic support seat 1.2.1 and the power wheel assembly 1.1 and is sleeved on the guide rod 1.2.2. The tension nut 1.2.5 is installed on the elastic support seat 1.2.1, and the compression amount of the tension spring is controlled by rotating the tension nut 1.2.5 to adjust the tightness of the abrasive belt 1.4.

[0033] As Figure 6As shown, at one end of the elastic support base 1.2.1 for arranging the working wheel assembly 1.3, there is a quick telescoping mechanism 1.2.6. The quick telescoping mechanism 1.2.6 includes a tensioning handle 1.2.6.1, a tensioning connecting rod 1.2.6.2, an extension rod 1.2.6.3, a locking wrench 1.2.6.4, and an elastic pin 1.2.6.5. The extension rod 1.2.6.3 is slidably connected to the elastic support base 1.2.1, and the extension rod 1.2.6.3 is fixedly connected to the working wheel assembly 1.3. A tensioning handle 1.2.6.1 is hinged in the middle groove of the elastic support base 1.2.1. A tensioning connecting rod 1.2.6.2 is respectively hinged to the extension rod 1.2.6.3 and the tensioning handle 1.2.6.1 to form a connecting rod mechanism. By operating the tensioning handle 1.2.6.1, the extension rod 1.2.6.3 can be extended or retracted, which is convenient for replacing the abrasive belt and tensioning the abrasive belt, and is much more convenient and faster than adjusting the length of the lead screw. The elastic support base is provided with a locking wrench 1.2.6.4 for locking the tensioning handle. An elastic pin 1.2.6.5 is fixed on the extension rod 1.2.6.3, and both ends of the elastic pin 1.2.6.5 are installed in the sliding grooves of the elastic support base, which can ensure the reliable telescoping action of the extension rod 1.2.6.3 and the reliable locking of the working position.

[0034] As Figure 1 , Figure 6 shown, it further includes a roller positioning mechanism 1.5 fixedly connected to the elastic support mechanism 1.2.1. The roller positioning mechanism 1.5 includes a positioning seat 1.5.1, a flipping arm 1.5.2, a positioning wheel 1.5.3, a pin locking mechanism 1.5.4, and a ball head plunger 1.5.5. The flipping arm 1.5.2 is installed in the slot of the positioning seat 1.5.1. One end is equipped with a positioning wheel 1.5.3, and the other end is hinged to the positioning seat 1.5.1. When the flipping arm 1.5.2 drives the positioning wheel 1.5.3 to be in the extended position, it can provide a working reference for the abrasive belt at the working wheel assembly 1.3, roll on the surface of the rail base metal in the non-welding area to play a profiling and positioning role, control the remaining height of the grinding object, and improve the flatness of the grinding surface. The flipping arm 1.5.2 can swing 180° in the slot of the positioning seat 1.5.1 around the rotating shaft 1.5.6, and there are two positions of extending and retracting the positioning wheel. When the flipping arm 1.5.2 is in the extended position, it is firmly positioned by the pin locking mechanism 1.5.4. When the flipping arm 1.5.2 is in the retracted position, it is locked by the ball head plunger 1.5.5. As Figure 3 shown, when the flipping arm 1.5.2 is in the retracted position, it can avoid the interference between the positioning wheel 1.5.3 and the rail when chamfering and grinding the weld remaining height.

[0035] As Figure 6As shown in the figure, the pin locking mechanism 1.5.4 includes a pin locking seat 1.5.4.1, a positioning pin 1.5.4.2, a lever wrench 1.5.4.3, a spring, a retaining ring, and a nut. The pin locking seat 1.5.4.1 is fixedly installed on the positioning seat 1.5.1. The lever wrench is hinged to the pin locking seat 1.5.4.1 through a pin shaft. The positioning pin 1.5.4.2 and the spring are installed in the hole of the pin locking seat 1.5.4.1. The lever wrench 1.5.4.3 can move the positioning pin 1.5.4.2 in the hole, so that the positioning pin 1.5.4.2 is pressed tightly against the pin hole of the flipping arm 1.5.2 or separated from the pin hole under the action of the internal spring. That is, when the flipping arm 1.5.2 works and extends out, it is reliably locked to the positioning seat 1.5.1 by the positioning pin 1.5.4.2.

[0036] As Figure 7 、 Figure 8 shown in the figure, the belt sander 1 further includes a front handle 1.6, a rear handle 1.7, a junction box 1.8, a front protective cover 1.9, and a rear protective cover 1.10. The front handle 1.6 is installed on the elastic support seat 1.2.1. The rear handle 1.7 is fixed on the motor base 1.2. The rear handle 6.2 is provided with a power switch 1.7.1 and a switch locking button 1.7.2, which is convenient for controlling the start and stop of the grinding motor 1.1.1 during the handheld operation. The front handle 5.5 and the rear handle 5.6 are respectively held by the operator's left and right hands, and the positions are reasonably set, making the operation labor-saving. The front protective cover 1.9 is installed on the front handle 1.6, and the junction box 1.8 and the rear protective cover 1.10 are installed on the motor base 1.2. Installing the protective cover at the handheld position can play a protective role in personal safety, and has the characteristics of simple structure and light weight.

[0037] As Figure 7 、 Figure 8 shown in the figure, the driving wheel assembly 1.1 includes a motor 1.1.1, a motor base 1.1.2, and a driving wheel 1.1.3. The driving wheel 1.1.3 is a cylindrical structure, sleeved on the motor 1.1.1 and connected to the motor output shaft. The flange mounting surface in the middle of the motor 1.1.1 is installed on the motor base 1.1.2, that is, the end with the driving wheel is installed in the cavity of the motor base 1.1.2. The output shaft of the motor 1.1.1 drives the driving wheel 1.1.3 to rotate through a key. The outer surface of the driving wheel 1.1.3 is provided with grooves, and the sand belt 1.4 is stuck in the grooves, making its operation safe and reliable. The nested installation method of the motor 1.1 and the driving wheel 1.3 significantly reduces the width of the equipment, makes the appearance compact, and improves the installation adaptability of the equipment.

[0038] As Figure 6 、 Figure 8As shown, the working wheel assembly 1.3 includes a wheel seat 1.3.1, a working wheel 1.3.2, a wheel axle 1.3.3, rolling bearings, and screws. The working wheel 1.3.2 is connected to the wheel axle 1.3.3 through rolling bearings, installed on the wheel seat 1.3.1, and the wheel axle 1.3.3 and the wheel seat 1.3.1 are fixed using screws. The outer surface of the working wheel 1.3.2 is a multi-ring groove structure, which is conducive to the stable fitting of the abrasive belt 1.4 and the working wheel 1.3.2.

[0039] Both the upper swing arm 3 and the front swing arm 2 are integral structures and are provided with weight reduction grooves.

[0040] Due to the adoption of a link mechanism, a commutation mechanism, a swing angle position adjustment and locking mechanism, an abrasive belt grinding method, and a motor as the power source, the present invention can achieve the grinding of the weld seams on the web and the bottom of the rail of the welded joint of the rail, and has a compact structure, light weight, convenient operation, and good environmental protection performance.

Claims

1. A small rail weld grinding machine, comprising a sand belt grinding machine, a front swing arm, an upper swing arm, and a rail clamping mechanism. One end of the upper swing arm is hinged to the rail clamping mechanism, and the other end is hinged to the front swing arm. One end of the front swing arm is hinged to the upper swing arm, and the other end is connected to the sand belt grinding machine. The sand belt grinding machine includes a power wheel assembly, an elastic support mechanism, a working wheel assembly, a sand belt, and a roller positioning mechanism. The roller positioning mechanism is fixedly connected to the elastic support mechanism. The sand belt is sleeved on the power wheel assembly and the working wheel assembly. The power wheel assembly and the working wheel assembly are tensioned by the elastic support mechanism. The elastic support mechanism includes an elastic support seat, a guide rod, a tension spring, and a tension nut. The tension spring is located between the elastic support seat and the power wheel assembly and is sleeved on the guide rod. The roller positioning mechanism includes a positioning seat, a turning arm, a positioning wheel, a pin locking mechanism, and a ball plunger. The turning arm is installed in the slot of the positioning seat. The positioning wheel is installed at the front end of the turning arm. The rear end of the turning arm is hinged to the positioning seat. A pin locking mechanism is installed in front of the hinge shaft of the positioning seat, and a ball plunger is installed behind the hinge shaft. Locking holes for the pin locking mechanism and the ball plunger are respectively provided on both sides of the hinge shaft of the turning arm. The upper swing arm is provided with a swing angle adjustment plate. The swing angle adjustment plate is installed beside the hinge shaft of the upper swing arm and the reversing seat, and two positioning holes are provided along the circumferential direction of the hinge shaft. The reversing seat is provided with an upper swing arm knob plunger that can be inserted into the positioning hole for position locking beside the hinge shaft. The rail clamping mechanism includes a reversing seat, a sliding seat, and a rail clamp. The rail clamp and the sliding seat are connected by two linear bearings and locked with a handle. One end of the upper swing arm is hinged to the reversing seat through a horizontal pin shaft. The reversing seat and the sliding seat are hinged through a vertical pin shaft. Three positioning holes are provided on each side of the vertical pin shaft of the sliding seat. The reversing seat is provided with a reversing knob plunger that can be inserted into the positioning hole for position locking beside the vertical pin shaft.

2. The small rail weld grinding machine according to claim 1, characterized in that a quick telescoping mechanism is provided at one end of the elastic support mechanism for arranging the working wheel assembly. The quick telescoping mechanism includes a tensioning handle, a tensioning link, an extending rod, a locking wrench, and an elastic pin. The extending rod is slidably connected to the elastic support seat. The extending rod is fixedly connected to the working wheel assembly. The middle of the elastic support seat has a groove. A tensioning handle is hinged in the groove. A tensioning link is respectively hinged to the extending rod and the tensioning handle.

3. The small rail weld grinding machine according to claim 1, characterized in that the elastic support seat is provided with a locking wrench for locking the tensioning handle. An elastic pin is fixed on the extending rod, and both ends of the elastic pin are installed in the sliding grooves of the elastic support seat.

4. The small rail weld grinding machine according to claim 1, characterized in that the elastic support seat is provided with a groove for the grinding sand belt to pass through. A front handle is installed on the elastic support seat for the operator to hold with the left hand. A rear handle is fixed on the motor seat for the operator to hold with the right hand. The rear handle is provided with a power switch and a switch locking button.

5. The small rail weld grinding machine according to claim 1, characterized in that The arm bodies of the upper swing arm and the front swing arm are both integral structures and are provided with weight reduction grooves.

6. The small rail weld grinding machine according to claim 1, characterized in that it further includes an auxiliary guide rod arranged parallel to the guide rod. Both the guide rod and the auxiliary guide rod are fixedly connected to the elastic support seat and are slidably connected to the power wheel assembly.

7. The small rail weld grinding machine according to claim 1, characterized in that the power wheel assembly includes a motor, a motor base, and a driving wheel. The driving wheel is a cylindrical structure, sleeved on the motor and connected to the motor output shaft. The middle part of the motor is a flange structure, and the end with the driving wheel is installed in the cavity of the motor base. A groove is provided on the outer surface of the driving wheel, and the abrasive belt is stuck in the groove.

8. The small rail weld grinding machine according to claim 1, characterized in that the outer surface of the working wheel in the working wheel assembly is a structure of multiple annular grooves.

9. The small rail weld grinding machine according to claim 1, characterized in that it further includes a front protective cover and a rear protective cover. The front protective cover is installed on the front handle, and the rear protective cover is installed on the motor base.

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