Steel rail welding seam polishing device

Abstract

The utility model discloses a steel rail welding seam polishing device which comprises a rectangular base and a motor, two rail wheels are installed on the two sides of the bottom of the base, a handle is installed on one side of the base, a through hole penetrating up and down is formed in the middle of the base, four guide rods are symmetrically installed on the upper side of the base, and a rectangular top plate is fixedly installed on the tops of the guide rods. The four guide rods are provided with a box body capable of sliding up and down, the bottom of the box body is fixedly provided with a U-shaped mounting seat, the mounting seat vertically penetrates through a through hole in the base, the lower end of the mounting seat is provided with a polishing wheel assembly, and the polishing wheel assembly is driven by a motor through a belt to rotate; the grinding wheel assembly comprises a spline shaft and two grinding cone pulleys, the two grinding cone pulleys and the spline shaft are coaxially installed and restrained in the circumferential direction, the two grinding cone pulleys are oppositely arranged and form an annular grinding groove with the variable width, the grinding cone pulleys are pushed by springs on the outer sides to compensate the abrasion loss, the rail top can be ground at a time, and the grinding efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of railway engineering equipment technology, specifically a rail weld grinding device. Background Technology

[0002] After prolonged use, railway rails may fracture due to repeated rolling by train wheels and inherent defects. This is especially true in winter when low temperatures reduce the toughness and plasticity of the steel, making fractures more likely. After a rail fracture, aluminothermic welding is typically used for butt welding. After welding, the weld seam needs to be ground smooth to reduce bumps. A search revealed Chinese invention patent CN117364549A, which discloses a full-section weld seam grinding machine. This invention overcomes the technical shortcomings of existing machines, such as difficulty in grinding the rail web and rail bottom, inability to perform full-section grinding, low work efficiency, high labor intensity, and high safety risks. However, the above solution also has the following drawbacks: grinding the weld seam of a fractured rail mainly targets the rail top (because the wheel contacts the rail top, so the rail top needs to be relatively flat), and the aforementioned grinding machine can only grind one side of the rail at a time, resulting in low efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a rail weld grinding device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a rail weld grinding device, comprising a rectangular base and a motor. Two track wheels are mounted on both sides of the bottom of the base, a handle is mounted on one side of the base, and a through hole runs vertically through the center of the base. Four guide rods are symmetrically mounted on the upper side of the base, and a rectangular top plate is fixedly mounted on the top of each guide rod. A sliding housing is mounted on the four guide rods, and a U-shaped mounting seat is fixedly mounted on the bottom of the housing, with the mounting seat vertically penetrating the upper part of the base. The mounting base has a through hole, and a grinding wheel assembly is installed at its lower end. The grinding wheel assembly is driven to rotate by a motor via a belt. The grinding wheel assembly includes a splined shaft and two grinding conical wheels. The two grinding conical wheels are coaxially mounted with the splined shaft and are circumferentially constrained. The two grinding conical wheels are arranged opposite each other and form an annular grinding groove with a variable width. The annular grinding groove is used to engage with the upper part of the rail. A retaining ring is fixedly installed on the splined shaft, and a spring is provided between the retaining ring and the outer side of the grinding conical wheel. The spring is sleeved on the splined shaft.

[0005] Preferably, guide sleeves are fixedly installed on the left and right sides of the box, and the guide sleeves are slidably connected to the guide rods one by one.

[0006] Preferably, a vertically penetrating screw is screwed into the middle of the top plate, the lower end of the screw is rotatably connected to the top of the box, and a handwheel is fixedly installed at the upper end of the screw.

[0007] Preferably, the inner side of the grinding cone wheel is provided with a semi-circular grinding straight section.

[0008] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model is provided with an annular grinding groove of variable width. The bottom of the annular grinding groove is engaged with the top of the rail, which can grind the top surface of the rail and the weld seams on both sides of the rail top in one go, which is conducive to improving grinding efficiency. The two grinding cone wheels are respectively pushed by springs from the outside to achieve close contact and tightness with the rail, thereby compensating for the axial wear of the grinding cone wheels and helping to extend the service life. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0010] Figure 2 A schematic diagram showing the fit between the base for mounting the track wheels and the steel rail;

[0011] Figure 3 This is a three-dimensional structural diagram of the grinding wheel assembly;

[0012] Figure 4 This is a schematic diagram showing the fit between the grinding wheel assembly and the steel rail.

[0013] In the diagram: 1. Base; 2. Track wheel; 3. Handle; 4. Top plate; 5. Guide rod; 6. Lead screw; 7. Housing; 8. Guide sleeve; 9. Grinding wheel assembly; 91. Splined shaft; 92. Grinding conical wheel; 93. Retaining ring; 94. Spring; 95. Annular grinding groove; 96. Grinding straight section; 10. Motor; 11. Mounting base. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0015] Please see Figure 1-4This utility model provides a technical solution: a rail weld grinding device, including a rectangular base 1 and a motor 10. Two track wheels 2 are installed on both sides of the bottom of the base 1, and a handle 3 is installed on one side of the base 1. The handle 3 is made of bent steel pipe. The middle of the base 1 has a through hole running vertically through it. Four guide rods 5 are symmetrically installed on the upper side of the base 1. A rectangular top plate 4 is fixedly installed on the top of the guide rods 5. The four guide rods 5 are equipped with a box 7 (rectangular structure and open at the front and back) that can slide vertically. A vertically penetrating screw rod 6 is screwed into the middle of the top plate 4. The lower end of the screw rod 6 is rotatably connected to the top of the box 7. A handwheel is fixedly installed on the upper end of the screw rod 6. By rotating the screw rod through the handwheel, the box 7 can be driven to move vertically.

[0016] Guide sleeves 8 are fixedly installed on the left and right sides of the housing 7, and the guide sleeves 8 are slidably connected to the guide rods 5 one by one. A U-shaped mounting base 11 is fixedly installed at the bottom of the housing 7. The mounting base 11 vertically penetrates the through hole on the base 1. The size of the mounting base 11 is smaller than the size of the through hole. A grinding wheel assembly 9 is installed at the lower end of the mounting base 11. The grinding wheel assembly 9 is driven to rotate by the motor 10 through a belt (the output shaft of the motor 10 extends out of the front port of the housing 1).

[0017] The grinding wheel assembly 9 includes a splined shaft 91 and two grinding conical wheels 92. The inner side of each grinding conical wheel 92 has a semi-circular grinding straight section 96 for grinding the top surface of the rail. The inner ring of the grinding conical wheel 92 is a metal disc (for easy machining of splined holes), and the outer ring is covered with abrasive. The two grinding conical wheels 92 are coaxially mounted with the splined shaft 91 and are circumferentially constrained. The two grinding conical wheels 92 are arranged opposite each other, forming a variable-width annular grinding groove 95. The annular grinding groove 95 is used to engage with the upper part of the rail. A retaining ring 93 is fixedly mounted on the splined shaft 91. A spring 94 is positioned between the retaining ring 93 and the outer side of the grinding conical wheels 92. The spring 94 is sleeved on the splined shaft 91. When compressed, the two springs 94 push the two grinding conical wheels 92 closer together, thus clamping the rail top from opposite sides during grinding, allowing for the grinding of the upper surface of the rail top and the welds on both sides.

[0018] Working Principle: During use, the device is positioned at the weld seam of the rail, with the rail wheel 2 engaging with the rail. The operator uses the handle 3 for support to maintain stability. For outdoor use, a generator set or outdoor power supply can be used to power the motor 10. Turning the handwheel pushes the housing 7 and the grinding wheel assembly 9 downwards synchronously, causing the annular grinding groove 95 formed by the two grinding conical wheels 92 to engage with the weld seam at the top of the rail. As the grinding conical wheels 92 rotate, they cover the top and sides of the rail, thus achieving a smooth finish in one pass. During use, the grinding conical wheels 92 experience wear; a spring 94 pushes the grinding conical wheels 92 axially to compensate for this wear. The device can be reciprocated along the rail during grinding, with the grinding wheel assembly 9 continuously passing over the weld seam, which helps improve the uniformity of the grinding.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rail weld grinding device, comprising a rectangular base (1) and a motor (10), wherein two track wheels (2) are installed on both sides of the bottom of the base (1), a handle (3) is installed on one side of the base (1), a through hole is provided in the middle of the base (1), four guide rods (5) are symmetrically installed on the upper side of the base (1), and a rectangular top plate (4) is fixedly installed on the top of the guide rods (5), characterized in that: The four guide rods (5) are equipped with a sliding box (7). A U-shaped mounting base (11) is fixedly installed at the bottom of the box (7). The mounting base (11) passes vertically through the through hole on the base (1). A grinding wheel assembly (9) is installed at the lower end of the mounting base (11). The grinding wheel assembly (9) is driven to rotate by a motor (10) through a belt. The grinding wheel assembly (9) includes a spline shaft (91) and two grinding conical wheels (92). The two grinding conical wheels (92) are coaxially mounted with the spline shaft (91) and are circumferentially constrained. The two grinding conical wheels (92) are arranged opposite to each other and form an annular grinding groove (95) with a variable width. The annular grinding groove (95) is used to engage with the upper part of the rail. A retaining ring (93) is fixedly mounted on the spline shaft (91). A spring (94) is provided between the retaining ring (93) and the outer side of the grinding conical wheel (92). The spring (94) is sleeved on the spline shaft (91).

2. The rail weld grinding device according to claim 1, characterized in that: Guide sleeves (8) are fixedly installed on the left and right sides of the box (7), and the guide sleeves (8) and guide rods (5) are adapted to each other and slidably connected.

3. The rail weld grinding device according to claim 2, characterized in that: A vertically penetrating screw rod (6) is screwed into the middle of the top plate (4). The lower end of the screw rod (6) is rotatably connected to the top of the box body (7), and a handwheel is fixedly installed at the upper end of the screw rod (6).

4. The rail weld grinding device according to claim 1, characterized in that: The inner side of the grinding conical wheel (92) is provided with a semi-circular grinding straight section (96).

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