A special grinding device for contact rails

Abstract

This utility model relates to the technical field of grinding equipment, specifically a grinding device for contact rails. It includes a guide rail, a slider slidably mounted on the guide rail, an angle grinder mounted on the slider, and hand-operated ball screws mounted on both sides of the guide rail. A positioning clamping device is installed at the upper end of each hand-operated ball screw, used to clamp and fix the upper end of the hand-operated ball screw onto the contact rail. This grinding device for contact rails utilizes the sliding cooperation between the guide rail and the slider, combined with the precise lifting and lowering adjustment of the hand-operated ball screws, to achieve precise control of the grinding feed. Compared to manual hand-operated angle grinder grinding, the smoothness of the grinding is significantly improved, effectively preventing current collection failures in the current-collecting shoes of electric trains due to uneven flow surfaces, thus ensuring the safety of subway operations.

Description

Technical Field

[0001] This utility model relates to the field of grinding equipment technology, and more specifically, to a grinding device for contact rails. Background Technology

[0002] In the field of rail transit, the maintenance of the contact rail is crucial, especially the flatness of its current-collecting surface, which directly affects the normal current intake of the current collector shoes of electric trains. Currently, contact rail grinding faces many challenges. Referring to prior art (patent application number 202220355899.9, "A Contact Rail Grinding Device"), although it extends the grinding length to some extent by setting a base parallel to the length direction of the contact rail, and equipping the base with a sliding mechanism and a grinding mechanism, thus facilitating a smooth transition of the contact rail at the interface, and the base has a slot that mates with the contact rail for positioning, reducing grinding movement and improving grinding accuracy, this device still has limitations when dealing with lower contact rails.

[0003] The lower contact rail is subject to installation constraints, with its location and space being quite unique. Grinding devices like those described in the patent above are difficult to adapt flexibly to the special installation environment of lower contact rails, presenting significant challenges in controlling the amount and length of grinding. Currently, contact rail installation requires high precision, with a height difference at the rail joint required to be ≤0.1mm, but there is no standard for grinding length. When the height difference exceeds the standard and grinding is necessary, the conventional method is manual grinding with a handheld angle grinder, as there is a lack of dedicated grinding tools for the current-collecting surface of the contact rail on the market. Manual grinding is not only inefficient, but also, for operating lines, especially after replacing end elbows, the height difference between the end elbow and the old rail joint increases, making it extremely difficult to ensure a smooth current-collecting surface after grinding, easily resulting in unevenness, which seriously affects the normal current collection of the electric train's current collector shoe. Furthermore, manual grinding also suffers from high labor intensity, high skill requirements for operators, and inconsistent grinding quality. Therefore, it is urgent to develop a special grinding device that is specifically designed for lower contact rails, can accurately control the grinding amount and length, improve grinding efficiency and quality, and reduce labor intensity. Utility Model Content

[0004] The purpose of this invention is to provide a dedicated grinding device for contact rails, addressing the limitations imposed by installation conditions on lower contact rails, which are subject to specific location and space constraints. Grinding devices like those in the aforementioned patents are difficult to adapt flexibly to the unique installation environment of lower contact rails, and present significant challenges in controlling the grinding amount and length.

[0005] To achieve the above objectives, this utility model provides a special grinding device for contact rails, including a guide rail, a slider slidably disposed on the guide rail, an angle grinder mounted on the slider, a hand-operated ball screw mounted on both sides of the guide rail, and a positioning clamping device mounted on the upper end of the hand-operated ball screw, the positioning clamping device being used to clamp and fix the upper end of the hand-operated ball screw on the contact rail.

[0006] This setup uses a guide rail as the basic support structure, allowing the slider to slide along it and providing a moving track for the angle grinder. A manual ball screw is mounted on both sides of the guide rail, enabling vertical adjustment. A positioning clamping device is installed on the upper end of the manual ball screw, clamping the contact rail to fix the entire grinding device in the desired position. Through the coordinated operation of these components, an adjustable and stable grinding system is formed.

[0007] Preferably, a connecting channel steel is installed on the slider, and the angle grinder is connected and fixed to the connecting channel steel.

[0008] This feature involves installing a connecting channel steel on the slider to connect and fix the angle grinder, ensuring that the angle grinder is securely mounted on the slider and will not shake or shift as it moves with the slider.

[0009] Preferably, a connecting angle steel is installed at the lower end of the hand-operated ball screw, and the connecting angle steel is connected and fixed to both ends of the guide rail.

[0010] This feature involves installing a connecting angle steel at the lower end of the hand-operated ball screw. The connecting angle steel is then fixed to both ends of the guide rail, securely connecting the hand-operated ball screw to the guide rail and forming a stable triangular structure, thereby enhancing the structural strength and stability of the entire device.

[0011] Preferably, one end of the positioning and clamping device is equipped with an upper connecting plate, and the upper end of the hand-operated ball screw is connected and fixed to the upper connecting plate.

[0012] This setting features an upper connecting plate installed at one end of the positioning clamping device, with the upper end of the hand-operated ball screw connected and fixed to the upper connecting plate. The upper connecting plate enables a reliable connection between the positioning clamping device and the hand-operated ball screw, allowing the force exerted by the positioning clamping device when fixing the contact rail to be effectively transmitted to the hand-operated ball screw.

[0013] Preferably, the slider drives the angle grinder to move linearly and is fixed to the guide rail by bolts.

[0014] This setting allows the slider to move linearly along the guide rail. The slider is locked and fixed to the guide rail by bolts. When it is necessary to fix the grinding position, tighten the bolts to restrict the movement of the slider. When it is necessary to adjust the grinding position, loosen the bolts to allow the slider to slide freely.

[0015] Preferably, the hand crank ball screw includes a screw, with fixed seats installed at both the upper and lower ends of the screw. A hand crank is connected to the upper end of the screw, and a movable block is installed on the screw. The screw is rotated by the hand crank, which in turn drives the movable block to move up and down. The outer side of the movable block is connected to a guide rail.

[0016] In this setting, the hand crank drives the ball screw to rotate. The ball screw and the moving block are connected by a thread. When the ball screw rotates, the moving block moves up and down along the ball screw. The outer side of the moving block is connected to the guide rail, thereby driving the guide rail and the angle grinder mounted on the guide rail to adjust the vertical position.

[0017] Preferably, a guide rod is installed between the two sides of the fixed base, and the moving block slides in cooperation with the guide rod.

[0018] This feature involves installing guide rods on both sides of the fixed base. The moving block slides in conjunction with the guide rods. When the moving block rises and falls under the drive of the lead screw, the guide rods provide guidance for the moving block, restricting its rotation and ensuring that it can only move in a straight line along the direction of the guide rods.

[0019] Preferably, the positioning and clamping device includes a threaded rod, one end of which is fitted with a screwing end, and the other end of which is fitted with a limiting end. A fixed clamping block and a movable clamping block are threaded through the threaded rod. The threaded rod is slidably engaged with the fixed clamping block and threadedly connected with the movable clamping block. When the screwing end is screwed, it drives the threaded rod to rotate, thereby causing the movable clamping block to move. The movable clamping block and the fixed clamping block cooperate to clamp the contact rail.

[0020] This setting allows the screw end to rotate the threaded rod. Since the threaded rod is threadedly connected to the movable clamping block and slidably engaged with the fixed clamping block, when the threaded rod rotates, the movable clamping block moves along the threaded rod and cooperates with the fixed clamping block to clamp or release the contact rail.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] This dedicated contact rail grinding device utilizes the sliding cooperation between the guide rail and the slider, combined with the precise lifting and lowering adjustment of the hand-operated ball screw, to achieve precise control of the grinding feed. Compared with manual hand-held angle grinder grinding, the grinding smoothness is significantly improved, effectively avoiding the failure of current collection shoes of electric trains due to uneven flow surfaces, and ensuring the safety of subway operation.

[0023] The slider drives the angle grinder to move linearly on the guide rail, replacing manual reciprocating grinding, greatly shortening the grinding time and significantly improving the grinding efficiency of the contact rail flow surface; at the same time, the positioning and clamping device firmly fixes the grinding device, reducing the adjustment time during operation, further improving work efficiency and reducing the labor intensity of operators.

[0024] By combining and connecting channel steel, connecting angle steel and upper connecting plate, the components form a stable overall structure, which enhances the stability of the grinding device during operation, reduces shaking and displacement, ensures the reliability of the grinding process, and extends the service life of the device.

[0025] The positioning and clamping device adopts a cooperative structure of threaded rod, fixed clamping block and movable clamping block, which can flexibly adapt to contact rails of different specifications and achieve fast and accurate clamping and fixing; the design of the hand-cranked ball screw can flexibly adjust the distance between the grinder and the flow surface of the contact rail according to the actual grinding needs, and meet diverse grinding operation scenarios. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0027] Figure 2 This is a partial structural schematic diagram of the present invention;

[0028] Figure 3 This is a schematic diagram of the positioning and clamping device in this utility model;

[0029] Figure 4 This is a schematic diagram of the structure of the hand-operated rocker ball screw in this utility model;

[0030] The meanings of the labels in the diagram are as follows:

[0031] 1. Guide rail; 2. Slider; 3. Hand crank ball screw; 31. Screw; 32. Fixed base; 33. Hand crank; 34. Moving block; 35. Guide rod; 4. Contact rail; 5. Positioning and clamping device; 51. Threaded rod; 511. Tightening end; 512. Limiting end; 52. Fixed clamping block; 53. Moving clamping block; 6. Connecting channel steel; 7. Connecting angle steel; 8. Upper connecting plate; 9. Angle grinder. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] This utility model provides a special grinding device for contact rails, such as... Figure 1 , Figure 2As shown, the system includes a guide rail 1, a slider 2 slidably mounted on the guide rail 1, an angle grinder 9 mounted on the slider 2, hand-operated ball screws 3 mounted on both sides of the guide rail 1, and a positioning clamping device 5 mounted on the upper end of the hand-operated ball screws 3. The positioning clamping device 5 is used to clamp and fix the upper end of the hand-operated ball screws 3 onto the contact rail 4.

[0034] With guide rail 1 as the basic support structure, slider 2 can slide on guide rail 1, providing a moving track for angle grinder 9; manual ball screw 3 is installed on both sides of guide rail 1, enabling vertical adjustment; positioning clamping device 5 is installed on the upper end of manual ball screw 3, clamping contact rail 4 to fix the entire grinding device in the grinding position. Through the coordination of guide rail 1, slider 2, manual ball screw 3, positioning clamping device 5, and angle grinder 9, an adjustable and fixed grinding system is formed. This achieves stable installation and position adjustment of the grinding device on the contact rail. The cooperation between slider 2 and guide rail 1 allows angle grinder 9 to move and grind along the contact rail direction. Manual ball screw 3 can adjust the distance between angle grinder 9 and the contact rail receiving surface, ensuring the feasibility and flexibility of the grinding operation. Compared to manual grinding, this greatly improves the controllability of grinding.

[0035] In this embodiment, as Figure 1 , Figure 2 As shown, a connecting channel steel 6 is installed on the slider 2, and the angle grinder 9 is connected and fixed to the connecting channel steel 6.

[0036] A connecting channel steel 6 is installed on the slider 2 to connect and fix the angle grinder 9, ensuring that the angle grinder 9 is securely mounted on the slider 2 and will not shake or shift during movement with the slider 2. The connecting channel steel 6 tightly connects the slider 2 and the angle grinder 9, ensuring overall operational stability. This enhances the stability of the angle grinder 9 installation, preventing insecure installation from affecting the grinding effect, ensuring continuous and stable operation of the angle grinder 9 during grinding, improving grinding quality and efficiency, and also reducing safety risks caused by equipment instability.

[0037] Specifically, such as Figure 1 , Figure 2 As shown, a connecting angle steel 7 is installed at the lower end of the hand-operated ball screw 3, and the connecting angle steel 7 is connected and fixed to both ends of the guide rail 1.

[0038] A connecting angle steel 7 is installed at the lower end of the hand-operated ball screw 3. The connecting angle steel 7 is connected and fixed to both ends of the guide rail 1, firmly connecting the hand-operated ball screw 3 and the guide rail 1 to form a stable triangular structure, enhancing the structural strength and stability of the entire device. As a key connecting component, the connecting angle steel 7 effectively improves the stability of the combination of the guide rail 1 and the hand-operated ball screw 3. This improves the overall structural stability of the grinding device, reduces the impact of device shaking or displacement on grinding accuracy during grinding, ensures the precision of grinding operations, extends the service life of the device, and also makes operators feel safer during use.

[0039] Furthermore, such as Figure 1 , Figure 2 As shown, an upper connecting plate 8 is installed at one end of the positioning and clamping device 5, and the upper end of the hand-operated ball screw 3 is connected and fixed to the upper connecting plate 8.

[0040] A connecting plate 8 is installed at one end of the positioning clamping device 5. The upper end of the hand-operated ball screw 3 is connected and fixed to the connecting plate 8. The connecting plate 8 ensures a reliable connection between the positioning clamping device 5 and the hand-operated ball screw 3, allowing the force exerted by the positioning clamping device 5 when fixing the contact rail 4 to be effectively transmitted to the hand-operated ball screw 3. The connecting plate 8 acts as a bridge, ensuring effective force transmission. This ensures the reliability of the connection between the positioning clamping device 5 and the hand-operated ball screw 3, guarantees the stability of the entire device fixed on the contact rail 4, and allows the hand-operated ball screw 3 to be stably adjusted up and down, thereby ensuring the accuracy of the distance adjustment between the angle grinder 9 and the flow-receiving surface of the contact rail.

[0041] Furthermore, such as Figure 1 , Figure 2 As shown, slider 2 drives angle grinder 9 to move linearly and is fixed to guide rail 1 by bolts.

[0042] The slider 2 drives the angle grinder 9 to move linearly on the guide rail 1. The slider 2 is locked and fixed to the guide rail 1 by bolts. When a fixed grinding position is needed, tightening the bolts restricts the movement of the slider 2; when the grinding position needs to be adjusted, loosening the bolts allows the slider 2 to slide freely. The bolts, as fixing components, enable flexible control of the slider 2's position on the guide rail 1. This allows for flexible adjustment and precise fixing of the angle grinder 9's grinding position, facilitating quick adjustment of the angle grinder 9's position by the operator according to different grinding needs at different locations on the contact rail. Once the grinding position is determined, it can be reliably fixed, ensuring grinding accuracy and improving grinding efficiency. Compared to grinding devices without a fixing function, this method is more convenient and precise to operate.

[0043] Furthermore, such as Figure 4As shown, the hand crank ball screw 3 includes a screw 31, with fixed seats 32 installed at both the upper and lower ends of the screw 31. A hand crank 33 is connected to the upper end of the screw 31, and a movable block 34 is installed on the screw 31. The screw 31 is rotated by the hand crank 33, which in turn drives the movable block 34 to rise and fall. The outer side of the movable block 34 is connected to the guide rail 1.

[0044] In the hand-cranked ball screw 3, the hand crank 33 drives the lead screw 31 to rotate. The lead screw 31 and the moving block 34 are connected by a thread. When the lead screw 31 rotates, the moving block 34 moves up and down along the lead screw 31. The outer side of the moving block 34 is connected to the guide rail 1, thereby driving the guide rail 1 and the angle grinder 9 mounted on the guide rail 1 to adjust their vertical position. Through the transmission structure of the hand crank 33 - lead screw 31 - moving block 34, precise vertical adjustment is achieved. This enables precise adjustment of the distance between the angle grinder 9 and the contact rail receiving surface. The operator can precisely control the raising and lowering of the angle grinder 9 by rotating the hand crank 33 according to the actual grinding needs. Compared with manually estimating the adjustment distance, this greatly improves the accuracy of grinding feed control, thereby improving grinding quality and ensuring the flatness of the contact rail receiving surface.

[0045] Furthermore, such as Figure 4 As shown, a guide rod 35 is installed between the two sides of the fixed base 32, and the moving block 34 slides with the guide rod 35.

[0046] Guide rods 35 are installed on both sides of the fixed base 32. The moving block 34 slides with the guide rods 35. When the moving block 34 is raised and lowered by the lead screw 31, the guide rods 35 provide guidance for the moving block 34, restricting its rotation and ensuring that it can only move linearly along the direction of the guide rods 35. The guide rods 35, fixed base 32, and moving block 34 work together to ensure the stability of the moving block 34's raising and lowering. This ensures the stability and linearity of the moving block 34's raising and lowering motion, preventing the moving block 34 from shifting or shaking during the raising and lowering process. This further improves the accuracy of the vertical position adjustment of the angle grinder 9, making the grinding process more stable and reliable, and improving the grinding effect.

[0047] Furthermore, such as Figure 3 As shown, the positioning and clamping device 5 includes a threaded rod 51. One end of the threaded rod 51 is equipped with a screwing end 511, and the other end of the threaded rod 51 is equipped with a limiting end 512. A fixed clamping block 52 and a movable clamping block 53 are mounted on the threaded rod 51. The threaded rod 51 is slidably engaged with the fixed clamping block 52, and the threaded rod 51 is threadedly connected to the movable clamping block 53. When the screwing end 511 is screwed, it drives the threaded rod 51 to rotate, thereby causing the movable clamping block 53 to move. The movable clamping block 53 and the fixed clamping block 52 cooperate to clamp the contact rail 4.

[0048] The screwing end 511 drives the threaded rod 51 to rotate. Since the threaded rod 51 is threadedly connected to the movable clamping block 53 and slidably engaged with the fixed clamping block 52, when the threaded rod 51 rotates, the movable clamping block 53 moves along the threaded rod 51, cooperating with the fixed clamping block 52 to clamp or release the contact rail 4. Through the structure of the screwing end 511 - threaded rod 51 - fixed clamping block 52 - movable clamping block 53, the clamping control of the contact rail 4 is achieved. This enables rapid, precise, and stable clamping and fixing of the grinding device on the contact rail 4. The operator can easily adjust the distance between the fixed clamping block 52 and the movable clamping block 53 by screwing the screwing end 511 to accommodate contact rails of different specifications, while ensuring the reliability of the clamping force so that the grinding device does not loosen during grinding, ensuring the smooth progress of the grinding operation.

[0049] When using the contact rail grinding device of this utility model, the operator first moves the grinding device to the work site when it is necessary to grind the contact rail 4. The fixed clamping block 52 and the movable clamping block 53 in the positioning and clamping device 5 are placed on both sides of the contact rail 4. By turning the screwing end 511, the threaded rod 51 is driven to rotate, causing the movable clamping block 53 to move along the threaded rod 51 and gradually approach the fixed clamping block 52 until the contact rail 4 is clamped and fixed, thus completing the initial installation and positioning of the grinding device on the contact rail 4.

[0050] Depending on the specific condition of the part of the contact rail 4 to be polished, the operator turns the hand crank 33, which drives the lead screw 31 to rotate. Since the lead screw 31 is threadedly engaged with the moving block 34, the moving block 34 moves up and down along the lead screw 31, thereby driving the guide rail 1 and the angle grinder 9 installed on the guide rail 1 to move in the vertical direction, precisely adjusting the distance between the angle grinder 9 and the flow-receiving surface of the contact rail to achieve the appropriate polishing position.

[0051] After adjusting the vertical position, the operator pushes slider 2, causing slider 2 to move angle grinder 9 linearly along the contact rail direction on guide rail 1, and begins grinding the flow-receiving surface of the contact rail. During the grinding process, if it is necessary to fix the current grinding position, the bolts used to fix slider 2 can be tightened to restrict the movement of slider 2; if it is necessary to adjust the grinding position, the bolts can be loosened, slider 2 can be pushed to the appropriate position again, and then tightened to fix it.

[0052] During the grinding process, the operator observes the grinding progress of the contact rail's flow-receiving surface in real time. If the grinding depth or flatness is found to be insufficient, the distance between the angle grinder 9 and the contact rail's flow-receiving surface can be finely adjusted by turning the hand crank 33 to ensure grinding accuracy. Simultaneously, the sliding engagement between the guide rod 35 and the moving block 34 ensures the stability and linearity of the moving block 34's lifting movement, making the vertical adjustment of the angle grinder 9 more precise and reliable.

[0053] Once the contact rail receiving surface has been polished to the predetermined polishing quality standard, the operator first loosens the bolts used to fix the slider 2, moves the slider 2 and angle grinder 9 to a suitable position, and then reverses the screwing end 511 to move the moving clamp 53 away from the fixed clamp 52, loosens the clamp on the contact rail 4, and removes the polishing device from the contact rail 4, thus completing the entire polishing operation process.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A contact rail specific grinding device comprising a guide rail (1), characterized in that: A slider (2) is slidably arranged on the guide rail (1), and an angle grinder (9) is installed on the slider (2). A hand-operated ball screw (3) is installed on both sides of the guide rail (1). A positioning clamping device (5) is installed on the upper end of the hand-operated ball screw (3). The positioning clamping device (5) is used to clamp and fix the upper end of the hand-operated ball screw (3) on the contact rail (4).

2. The contact rail dedicated grinding device according to claim 1, characterized in that: A connecting channel steel (6) is installed on the slider (2), and the angle grinder (9) is connected and fixed to the connecting channel steel (6).

3. The contact rail dedicated grinding device according to claim 1, characterized in that: The lower end of the hand-operated ball screw (3) is equipped with a connecting angle steel (7), which is fixedly connected to both ends of the guide rail (1).

4. The contact rail dedicated grinding device according to claim 1, characterized in that: One end of the positioning clamping device (5) is equipped with an upper connecting plate (8), and the upper end of the hand-operated ball screw (3) is connected and fixed to the upper connecting plate (8).

5. The contact rail grinding device according to claim 1, characterized in that: The slider (2) drives the angle grinder (9) to move linearly and is fixed to the guide rail (1) by bolts.

6. The contact rail dedicated grinding device according to claim 1, characterized in that: The hand crank ball screw (3) includes a screw (31), with fixed seats (32) installed at both the upper and lower ends of the screw (31). A hand crank (33) is connected to the upper end of the screw (31), and a moving block (34) is installed on the screw (31). The screw (31) is driven to rotate by the hand crank (33), which in turn drives the moving block (34) to rise and fall. The outer side of the moving block (34) is connected to the guide rail (1).

7. The contact rail dedicated grinding device according to claim 6, characterized in that: A guide rod (35) is installed between the two sides of the fixed base (32), and the moving block (34) slides with the guide rod (35).

8. The contact rail dedicated grinding device according to claim 1, characterized in that: The positioning and clamping device (5) includes a threaded rod (51), one end of which is equipped with a screwing end (511) and the other end of which is equipped with a limiting end (512). A fixed clamping block (52) and a movable clamping block (53) are threaded through the threaded rod (51). The threaded rod (51) is slidably engaged with the fixed clamping block (52) and threadedly connected with the movable clamping block (53). When the screwing end (511) is screwed, it drives the threaded rod (51) to rotate, thereby causing the movable clamping block (53) to move. The movable clamping block (53) and the fixed clamping block (52) cooperate to clamp the contact rail (4).

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