Horizontal CT slip ring with brush head deviation prevention structure

Abstract

This invention relates to the field of CT equipment, specifically to a horizontal CT slip ring with a brush head anti-deviation structure. It includes a frame and a brush holder. A base and a tray are mounted on the frame. The tray has a ring track, on which a copper ring is mounted. A U-shaped groove is formed on the copper ring. The brush holder has a mounting seat, carbon brushes, and a buffer assembly. The carbon brushes are mounted on the mounting seat and are tightly connected to the U-shaped groove. The buffer assembly includes a frame and a first elastic element. The frame is mounted on the brush holder, and the mounting seat slides within the frame. The two ends of the first elastic element are connected to the frame and the mounting seat, respectively. This invention, through the frame, brush holder, mounting seat, carbon brushes, and buffer assembly, achieves the function of preventing the brush head from deviating from the ring track, ensuring that the carbon brushes move radially along the slip ring guided by the groove. This solves the problem of brush head deviation from the ring track caused by insufficient concentricity in large-diameter slip rings.

Description

Technical Field

[0001] This invention relates to the field of CT equipment, and more specifically to a horizontal CT slip ring with a brush head anti-deviation structure. Background Technology

[0002] The slip ring is one of the core components of a CT system, used for power, signal, and data transmission between the rotating and fixed ends of the CT scanner. To ensure the stability of the signal connection, the carbon brushes need to be aligned with the slip ring to prevent arcing during rotation.

[0003] To address this, Chinese patent CN210468342U discloses a slip ring carbon brush alignment device. By using this alignment device during installation, it directly ensures that the center of the carbon brush can be aligned with the center of the slip ring track. This method is quick, convenient, highly accurate, and low in cost. Furthermore, the thickness of the device ensures that the carbon brush plate is installed in place in one go, eliminating the need to adjust the distance between the carbon brush plate and the slip ring after alignment.

[0004] However, the inner diameter of existing horizontal CT slip rings is generally 800mm to 1200mm. It is difficult to ensure the concentricity of such large-diameter slip rings. When rotating, the brush head is prone to slipping out of the ring track due to misalignment. This can lead to increased contact resistance, unstable power supply to the equipment, or even arcing. Summary of the Invention

[0005] To address the aforementioned issues, a horizontal CT slip ring with a brush head anti-deviation structure is provided. This structure, consisting of a frame, brush holder, mounting base, carbon brush, and buffer assembly, solves the problem of brush head deviation from the ring track when concentricity of a large-diameter slip ring is insufficient.

[0006] To solve the problems of the prior art, the technical solution adopted by the present invention is as follows:

[0007] A horizontal CT slip ring with a brush head anti-deviation structure includes a frame and a brush holder. A base and a tray are mounted on the frame. The tray has a ring channel and a copper ring is mounted on the ring channel. A U-shaped groove is formed on the copper ring. The brush holder has a mounting seat, a carbon brush, and a buffer assembly. The carbon brush is mounted on the mounting seat and is tightly connected to the U-shaped groove. The buffer assembly includes a frame and a first elastic element. The frame is mounted on the brush holder, and the mounting seat is slidably engaged with the frame. The two ends of the first elastic element are connected to the frame and the mounting seat, respectively.

[0008] Preferably, the mounting base is also equipped with two guide rods, which are located on both sides of the carbon brush and are symmetrically arranged about the central axis of the carbon brush. The end of the guide rod near the copper ring is tightly fitted with the sliding groove on the copper ring.

[0009] Preferably, the brush holder is also equipped with a clamping assembly, which includes a limiting plate, a pressure plate, and a second elastic element; the limiting plate is connected to the end of the brush holder away from the copper ring; the pressure plate is connected to the brush holder through the second elastic element, and a guide rail is provided on the pressure plate, with the limiting plate slidingly engaging with the guide rail.

[0010] Preferably, the CT slip ring further includes a support mechanism, the support mechanism includes a magnetic plate connected to the frame, the frame and the brush holder are slidably engaged, the brush holder has a positioning groove that engages with the magnetic plate, and the positioning groove has a metal plate that engages with the magnetic plate.

[0011] Preferably, at least two copper rings and frames are provided, with adjacent frames staggered on the brush holder.

[0012] Preferably, the support mechanism further includes a fixing component for fixing the frame. The fixing component includes a mounting bracket installed on the brush holder, a bracket connected to the magnetic plate, a locking block and a pressing block slidably installed on the mounting bracket; the locking block has an arc-shaped surface and is connected to the mounting bracket by a spring; the bracket has a slot that mates with the locking block; the pressing block is slidably installed on the bracket.

[0013] Preferably, the guide rod has external threads and is threaded to the mounting base, and a rotating handle is installed at the end of the guide rod away from the copper ring.

[0014] Preferably, the CT slip ring further includes a cleaning assembly, which includes cleaning brushes mounted on the mounting base; two cleaning brushes are provided and are tightly fitted against the slide groove, with the two cleaning brushes located on both sides of the carbon brush.

[0015] Preferably, the bottom of the brush holder is provided with a collection hopper.

[0016] Preferably, the bottom of the brush holder is equipped with a locking seat, the collection hopper slides in conjunction with the locking seat, and a straight handle is installed on the collection hopper.

[0017] The advantages of this invention compared to the prior art are:

[0018] 1. This invention achieves the function of preventing the brush head from deviating from the ring track through the frame, brush holder, mounting base, carbon brush and buffer assembly, so that the carbon brush moves radially along the slip ring with the guide of the sliding groove, and solves the problem of brush head deviating from the ring track when the concentricity of large-diameter slip ring is insufficient.

[0019] 2. This invention reduces the pressure between the carbon brush and the groove by using a guide rod, thereby reducing carbon brush wear.

[0020] 3. The present invention achieves the function of keeping the carbon brush and the copper ring in close contact at all times through the limiting plate, the pressure plate and the second elastic element, so as to achieve the effect of having a certain pre-tightening force between the carbon brush and the copper ring. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of a horizontal CT slip ring with a brush head anti-deviation structure;

[0022] Figure 2 This is a three-dimensional schematic diagram of a horizontal CT slip ring with a brush head anti-deviation structure, showing the carbon brush and support mechanism.

[0023] Figure 3 This is a three-dimensional schematic diagram of a horizontal CT slip ring with a brush head anti-deviation structure, including the mounting base, carbon brush, and buffer assembly.

[0024] Figure 4 This is a cross-sectional schematic diagram of the carbon brush and copper ring in a horizontal CT slip ring with a brush head anti-deviation structure.

[0025] Figure 5 This is a three-dimensional exploded view of the brush holder and support mechanism in a horizontal CT slip ring with a brush head anti-deviation structure;

[0026] Figure 6 yes Figure 5 A magnified view of a portion of point A in the middle;

[0027] Figure 7 This is a three-dimensional schematic diagram of a horizontal CT slip ring with a brush head anti-deviation structure, including a mounting base, carbon brush, buffer assembly, and clamping assembly.

[0028] Figure 8 This is a three-dimensional schematic diagram of a horizontal CT slip ring with a brush head anti-deviation structure, including a mounting base and a clamping assembly.

[0029] Figure 9 This is a three-dimensional exploded diagram of the brush holder and cleaning components in a horizontal CT slip ring with a brush head anti-deviation structure.

[0030] The numbers on the map are:

[0031] 1-Frame;

[0032] 11-Base;

[0033] 12-pallets;

[0034] 13-Copper ring; 131-Groove;

[0035] 2-Brush holder;

[0036] 21-Mounting base; 211-Guide rod; 2111-External thread; 212-Rotating handle;

[0037] 22-Carbon brush;

[0038] 23-Buffer assembly; 231-Frame; 232-First elastic element;

[0039] 24-Pressure assembly; 241-Limiting plate; 242-Pressure plate; 2421-Guide rail; 243-Second elastic element;

[0040] 3-Supporting structures;

[0041] 31-Magnetic plate;

[0042] 32-Positioning groove;

[0043] 33-Fixing component; 331-Mounting bracket; 332-Bracket; 3321-Slot; 333-Card; 334-Pressing block;

[0044] 4- Cleaning components;

[0045] 41-Cleaning brush;

[0046] 42-Collection bucket; 421-Straight handle;

[0047] 43-Card socket. Detailed Implementation

[0048] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0049] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 7 A horizontal CT slip ring with a brush head anti-deviation structure includes a frame 1 and a brush holder 2. The frame 1 is equipped with a base 11 and a tray 12. The tray 12 has a ring channel and a copper ring 13 is installed on the ring channel. The copper ring 13 has a U-shaped sliding groove 131. The brush holder 2 has a mounting seat 21, a carbon brush 22 and a buffer assembly 23. The carbon brush 22 is installed on the mounting seat 21 and is tightly connected to the U-shaped sliding groove 131. The buffer assembly 23 includes a frame 231 and a first elastic member 232. The frame 231 is installed on the brush holder 2. The mounting seat 21 is slidably engaged with the frame 231. The two ends of the first elastic member 232 are respectively connected to the frame 231 and the mounting seat 21.

[0050] The present invention achieves the function of preventing the brush head from deviating from the ring track through the frame 1, brush holder 2, mounting base 21, carbon brush 22 and buffer assembly 23, so that the carbon brush 22 moves radially along the slip ring with the guide of the slide groove 131, and solves the problem of brush head deviating from the ring track when the concentricity of the large-diameter slip ring is insufficient. The copper ring 13 of this invention is provided with a U-shaped groove 131, which can effectively restrain the brush head to slide reliably inside the groove 131 of the copper ring 13, preventing the carbon brush 22 from sliding out of the ring track. At the same time, it can restrain the dust generated by wear inside the groove 131 of the copper ring 13, reducing the risk of short circuit between rings. When the slip ring rotates, due to the error in processing and installation accuracy, its concentricity will have a certain deviation. During the rotation of the copper ring 13 with the groove 131, when the deviation causes the carbon brush 22 to deviate from the copper ring 13, it will first touch the two sides of the groove 131. After being subjected to force, the carbon brush 22 will shift towards the middle of the groove 131. At the same time, the first elastic element 232 is subjected to force and expands and contracts, and the mounting base 21 slides. This allows the carbon brush 22 to fully contact the plane of the copper ring 13 throughout the entire rotation process, thereby avoiding unstable power supply of the equipment and improving the reliability and safety of the CT slip ring.

[0051] Reference Figure 4 , Figure 7 and Figure 8 Two guide rods 211 are also installed on the mounting base 21. The two guide rods 211 are located on both sides of the carbon brush 22 and are symmetrically arranged about the central axis of the carbon brush 22. The end of the guide rod 211 near the copper ring 13 is tightly fitted with the sliding groove 131 on the copper ring 13.

[0052] This invention reduces the pressure between the carbon brush 22 and the slide groove 131 by using guide rods 211, thereby reducing wear on the carbon brush 22. The guide rods 211 are preferably made of metal. Through the cooperation of the guide rods 211 on both sides of the carbon brush 22 and the slide groove 131, when the slide groove 131 deviates from the axis of the slip ring, the metal ring located on the front side of the brush holder 2 will be subjected to pressure from the side wall of the slide groove 131 relative to the rotation direction of the slip ring. This pressure causes the mounting base 21 to slide, and the mounting base 21 drives the carbon brush 22 to move radially along the slip ring. This ensures that the carbon brush 22 is always in full contact with the copper ring 13, and the copper ring 13 does not exert excessive pressure on the carbon brush 22, thus reducing wear on the carbon brush 22 and preventing excessive dust accumulation in the slide groove 131.

[0053] Reference Figure 1 , Figure 3 , Figure 7 and Figure 8The brush holder 2 is also equipped with a clamping assembly 24, which includes a limiting plate 241, a pressure plate 242, and a second elastic element 243. The limiting plate 241 is connected to the end of the brush holder 2 away from the copper ring 13. The pressure plate 242 is connected to the brush holder 2 through the second elastic element 243. A guide rail 2421 is provided on the pressure plate 242, and the limiting plate 241 slides with the guide rail 2421.

[0054] This invention achieves the function of ensuring constant tight contact between the carbon brush 22 and the copper ring 13 through the limiting plate 241, the pressure plate 242, and the second elastic element 243, thus achieving a certain pre-tightening force between the carbon brush 22 and the copper ring 13. During prolonged use, the carbon brush 22 is constantly in contact with the copper ring 13, leading to wear. Once the carbon brush 22 wears to a certain extent, the contact between the carbon brush 22 and the copper ring 13 becomes unstable. Therefore, a clamping assembly 24 is designed. The elastic force of the second elastic element 243 drives the pressure plate 242, causing the pressure plate 242 to press the limiting plate 241 tightly, thereby ensuring a tight fit between the carbon brush 22 and the sliding groove 131 of the copper ring 13. When the mounting base 21 moves radially along the sliding ring, the mounting base 21 drives the brush holder 2 and the limiting plate 241 to move synchronously, allowing the limiting plate 241 to slide along the guide rail 2421. This clamps the carbon brush 22 without affecting its movement.

[0055] Reference Figure 2 , Figure 3 , Figure 5 and Figure 6 The CT slip ring also includes a support mechanism 3, which includes a magnetic plate 31 connected to the frame 231. The frame 231 and the brush holder 2 are slidably engaged. The brush holder 2 has a positioning groove 32 that engages with the magnetic plate 31. The positioning groove 32 contains a metal plate that engages with the magnetic plate 31.

[0056] When the carbon brush 22 is severely worn, it needs to be replaced. Since the carbon brush 22 is mounted on the mounting base 21, and the mounting base 21 is connected to the frame 231 through the first elastic element 232, a magnetic plate 31 and a positioning groove 32 are designed to realize the function of quick disassembly and assembly of the mounting base 21, thereby achieving the effect of convenient disassembly and assembly of the carbon brush 22. When the carbon brush 22 needs to be replaced, the operator simply pulls the mounting base 21 away from the copper ring 13. The mounting base 21 moves the magnetic plate 31. After the magnetic plate 31 separates from the positioning groove 32, the magnetic force is removed, allowing the frame 231 and mounting base 21 to be easily removed from the brush holder 2. This allows for the maintenance or replacement of the carbon brush 22. After the carbon brush 22 is replaced, the frame 231 is slid back onto the brush holder 2, and the magnetic plate 31 slides into the positioning groove 32. The positioning groove 32 quickly determines the installation position, and the frame 231 is fixed by the magnetic force of the magnetic plate 31, achieving a quick and accurate installation of the carbon brush 22.

[0057] Reference Figure 1 , Figure 2 , Figure 5 and Figure 9 At least two copper rings 13 and frames 231 are provided, with adjacent frames 231 being staggered on the brush holder 2.

[0058] The existing slip rings have more than 6 rings, and the frame 231 and mounting base 21 cause a single carbon brush 22 to occupy a lot of installation space. Therefore, the carbon brush 22 is integrated into a limited space by using staggered frames 231, thereby improving the maintenance and portability of the carbon brush 22. The brush holder 2 is divided into left and right installation areas along the central axis. The carbon brush 22 connecting wires can be installed in the two installation areas respectively. Multiple frames 231 are distributed in the two installation areas, and adjacent frames 231 are located on both sides of the installation area, forming a staggered structure, thereby improving the space utilization of the brush holder 2.

[0059] Reference Figure 3 , Figure 5 , Figure 6 and Figure 7 The support mechanism 3 also includes a fixing component 33 for fixing the frame 231. The fixing component 33 includes a mounting bracket 331 mounted on the brush holder 2, a bracket 332 connected to the magnetic plate 31, a locking block 333 slidably mounted on the mounting bracket 331, and a pressing block 334. The locking block 333 has an arc-shaped surface and is connected to the mounting bracket 331 by a spring. The bracket 332 has a slot 3321 that mates with the locking block 333. The pressing block 334 is slidably mounted on the bracket 332.

[0060] This invention achieves the function of fixing the frame 231 through the mounting bracket 331, support 332, locking block 333, and pressing block 334, thereby improving the installation stability of the frame 231. Fixing the frame 231 solely with the magnetic force of the magnetic plate 31 is not stable enough; if the force is too great, the carbon brush 22 may become misaligned. Therefore, a fixing component 33 is designed. When replacing the carbon brush 22, the operator presses the pressing block 334, which squeezes the arc-shaped surface of the locking block 333, thus pushing the locking block 333 away from the slot 3321. Then, the operator pulls the magnetic plate 31 outward, removing the frame 231 from the brush holder 2. After the carbon brush 22 is processed, the operator slides the frame 231 into the brush holder 2 and pushes the frame 231. As the frame 231 moves toward the copper ring 13, the bracket 332 presses against the locking block 333. The spring is compressed by the pressure. When the slot 3321 moves to the locking block 333, the locking block 333 pops out under the elastic force of the spring, thereby fixing the bracket 332 and completing the fixation of the frame 231, preventing the frame 231 from sliding on its own and causing the carbon brush 22 to deflect.

[0061] Reference Figure 4 and Figure 8 The guide rod 211 has an external thread 2111 and is threadedly connected to the mounting base 21. A rotating handle 212 is installed at the end of the guide rod 211 away from the copper ring 13.

[0062] The external thread 2111 is located at the end of the guide rod 211 furthest from the copper ring 13. This invention achieves the function of adjusting the extension and retraction of the guide rod 211 through the guide rod 211 and the rotating handle 212, thus adapting the guide rod 211 to the copper ring 13. When installing the guide rod 211, the operator first inserts it into the mounting base 21. When the external thread 2111 of the guide rod 211 contacts the mounting base 21, the operator rotates the rotating handle 212. The rotating handle 212 drives the guide rod 211 to rotate, thereby fixing the guide rod 211 onto the mounting base 21. The operator continues to rotate the rotating handle 212 until the end of the guide rod 211 near the copper ring 13 is tightly engaged with the sliding groove 131 of the copper ring 13. Furthermore, the preload between the guide rod 211 and the copper ring 13 can be adjusted by rotating the handle 212. This ensures that the guide rod 211 smoothly guides the movement of the mounting base 21 while reducing the preload between the guide rod 211 and the copper ring 13, thereby reducing the wear rate of the parts.

[0063] Reference Figure 2 , Figure 5 and Figure 9 The CT slip ring also includes a cleaning component 4, which includes a cleaning brush 41 mounted on the mounting base 21. Two cleaning brushes 41 are provided and are tightly fitted with the slide groove 131. The two cleaning brushes 41 are located on both sides of the carbon brush 22.

[0064] This invention utilizes a cleaning brush 41 to clean the toner inside the slide groove 131, thus preventing toner buildup and potential power instability. As the slip ring rotates, the cleaning brush 41 continuously brushes the slide groove 131, removing the toner and preventing its accumulation. This allows the slip ring to perform automatic cleaning while rotating.

[0065] Reference Figure 2 , Figure 5 and Figure 9 The bottom of the brush holder 2 is equipped with a collection hopper 42.

[0066] Since the cleaning brush 41 continuously brushes the toner off the slip ring, and if the toner falls onto other conductive parts, it will affect the power supply and cause unstable power supply. Therefore, a collection hopper 42 is installed at the bottom of the brush holder 2 to collect the fallen toner and prevent it from falling onto conductive components and causing short circuits and fires. At the same time, the collection hopper 42 can centrally process the toner.

[0067] Reference Figure 2 , Figure 5 and Figure 9 The bottom of the brush holder 2 is equipped with a locking seat 43, and the collection hopper 42 slides in conjunction with the locking seat 43. A straight handle 421 is installed on the collection hopper 42.

[0068] This invention enables quick assembly and disassembly of the collection hopper 42 through the straight handle 421 and the snap-fit ​​seat 43. After prolonged operation, a large amount of carbon powder will accumulate in the collection hopper 42, requiring the operator to process the carbon powder inside. For this purpose, the snap-fit ​​seat 43 and the straight handle 421 are designed. The operator pulls the straight handle 421, which in turn causes the collection hopper 42 to slide, causing the collection hopper 42 to separate from the snap-fit ​​seat 43, thereby removing the collection hopper 42. After processing, the operator pushes the collection hopper 42 again through the straight handle 421, causing the top of the collection hopper 42 to snap into the snap-fit ​​seat 43, thereby quickly installing the collection hopper 42.

[0069] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A horizontal CT slip ring with a brush head anti-deviation structure, comprising a frame (1) and a brush holder (2), wherein a base (11) and a tray (12) are installed on the frame (1), and the tray (12) has a ring channel and a copper ring (13) is installed on the ring channel. Its features are, The copper ring (13) has a U-shaped groove (131), and the brush holder (2) has a mounting base (21), a carbon brush (22) and a buffer assembly (23). The carbon brush (22) is mounted on the mounting base (21) and the carbon brush (22) is tightly connected to the U-shaped slide groove (131). The buffer assembly (23) includes a frame (231) and a first elastic member (232). The frame (231) is mounted on the brush holder (2). The mounting base (21) is slidably engaged with the frame (231). The two ends of the first elastic member (232) are respectively connected to the frame (231) and the mounting base (21). Two guide rods (211) are also installed on the mounting base (21). The two guide rods (211) are located on both sides of the carbon brush (22) and are symmetrically arranged about the central axis of the carbon brush (22). The end of the guide rod (211) close to the copper ring (13) is tightly fitted with the groove (131) on the copper ring (13). The CT slip ring also includes a support mechanism (3), which includes a magnetic plate (31) connected to the frame (231). The frame (231) and the brush holder (2) are slidably engaged. The brush holder (2) is provided with a positioning groove (32) that engages with the magnetic plate (31). The positioning groove (32) contains a metal plate that engages with the magnetic plate (31). The support mechanism (3) also includes a fixing component (33) for fixing the frame (231), the fixing component (33) including a mounting bracket (331) mounted on the brush holder (2), a bracket (332) connected to the magnetic plate (31), a locking block (333) slidably mounted on the mounting bracket (331), and a pressing block (334). The locking block (333) has an arc-shaped surface. The locking block (333) is connected to the mounting bracket (331) by a spring. The bracket (332) has a locking groove (3321) that cooperates with the locking block (333). The pressing block (334) is slidably mounted on the bracket (332).

2. A horizontal CT slip ring with a brush head anti-deviation structure according to claim 1, characterized in that, The brush holder (2) is also equipped with a clamping assembly (24), which includes a limiting plate (241), a pressure plate (242), and a second elastic element (243). The limiting plate (241) is connected to the end of the brush holder (2) away from the copper ring (13); The pressure plate (242) is connected to the brush holder (2) through the second elastic element (243). The pressure plate (242) is provided with a guide rail (2421), and the limiting plate (241) slides with the guide rail (2421).

3. A horizontal CT slip ring with a brush head anti-deviation structure according to claim 1, characterized in that, At least two copper rings (13) and frames (231) are provided, with adjacent frames (231) staggered on the brush holder (2).

4. A horizontal CT slip ring with a brush head anti-deviation structure according to claim 1, characterized in that, The guide rod (211) has an external thread (2111) and is threaded to the mounting base (21). A rotating handle (212) is installed at the end of the guide rod (211) away from the copper ring (13).

5. A horizontal CT slip ring with a brush head anti-deviation structure according to claim 1, characterized in that, The CT slip ring also includes a cleaning assembly (4), which includes a cleaning brush (41) mounted on a mounting base (21); there are two cleaning brushes (41) and they are in close contact with the slide groove (131), with the two cleaning brushes (41) located on both sides of the carbon brush (22).

6. A horizontal CT slip ring with a brush head anti-deviation structure according to claim 5, characterized in that, The bottom of the brush holder (2) is provided with a collection hopper (42).

7. A horizontal CT slip ring with a brush head anti-deviation structure according to claim 6, characterized in that, The bottom of the brush holder (2) is equipped with a snap-fit ​​seat (43), the collection hopper (42) slides with the snap-fit ​​seat (43), and a straight handle (421) is installed on the collection hopper (42).

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