A brake structure for a mobile C-arm X-ray machine

Abstract

The present invention discloses a brake structure for a mobile C-arm X-ray machine. The brake structure comprises a chassis, a brake buckle, a first brake assembly, and a second brake assembly. The brake buckle is located at the front end of the chassis, and the first and second brake assemblies are disposed oppositely on either side of the rear end of the chassis. The brake buckle has a long axis, one end of which extends to a position corresponding to the first brake assembly, and the other end of which extends to a position corresponding to the second brake assembly. One end of the long axis is transmission-connected to the first brake assembly via a first connecting rod assembly, and the other end of the long axis is transmission-connected to the second brake assembly via a second connecting rod assembly. The brake structure of the mobile C-arm X-ray machine is a complete unit, mounted on the chassis within the machine, and functions to brake the machine after it moves and stops, as well as after preoperative clinical position adjustment.

Description

Technical Field

[0001] The invention relates to a brake structure of a mobile C-arm X-ray machine. Background Art

[0002] A mobile C-arm X-ray machine (also known as a mobile C-arm X-ray machine) is an X-ray device with a C-shaped frame, used for real-time dynamic imaging during surgery. C-arms offer advantages such as low radiation dose, low infection risk, small footprint, and ease of mobility, and are now widely used in departments such as orthopedics, surgery, and gynecology in hospitals. C-arms are primarily used for orthopedic nailing, bone setting, and reduction; surgical pacemaker implantation, foreign body removal, some angiography, and some interventional procedures; as well as in conjunction with ozone therapy for pain treatment, acupuncture, and gynecological fallopian tube guidance surgery.

[0003] This type of product is widely used in hospitals, with almost all secondary hospitals equipped with it. Domestic manufacturers are also quite numerous, with significant presence in cities like Beijing, Nanjing, and Shanghai. However, quality and specifications vary. With the continued advancement of China's healthcare reform, demand is growing, with the product increasingly reaching even primary healthcare institutions, and is expected to become increasingly widespread over the next 5-10 years.

[0004] Mobile C-arm X-ray machines need to be used repeatedly during surgery. In addition to the crucial importance of aseptic operation (because infection in fracture internal fixation surgery will cause great pain to the patient), the stability of the equipment's brakes is also very important. Whether it is a manual mobile C-arm X-ray machine or a fully automatic mobile C-arm X-ray machine, if the equipment's brake effect is poor, the equipment will shift during repeated use during surgery, which is directly related to the deviation of the image position, increasing the difficulty of doctors' identification and judgment during clinical surgery and increasing the risk rate.

[0005] Among the existing mobile C-arm X-ray machines on the market, the brake structure layout is divided into three categories: front-mounted on both sides, rear-mounted on both sides, center-mounted on the rear, and handbrake:

[0006] The front-mounted brake structure is represented by the Siemens SIREMOBIL Compact L mobile C-arm X-ray machine. The brake pedal is placed directly above the rear wheels on both sides and is connected by a long axis. At the same time, eccentric wheels with the same eccentricity are installed at both ends of the long axis. The clockwise or counterclockwise flip can be achieved by stepping on the pedal. The eccentric wheel acts on the thimble to press the rear wheel to brake or release the thimble to release the rear wheel brake. The front-mounted brake has a simple structure, good braking effect, and easy operation. However, the pedal is located on the front side of the equipment body, which makes it inconvenient to step on the brake and is easily deviated due to touch after the preoperative equipment position adjustment. The braking force is large, and it is difficult for general nurses to operate. The front-mounted brake is easily affected by the movement of people in the environment or deviated from its position due to touch.

[0007] The GE model is a representative example of a dual-side rear-mounted brake structure. This retains the operational characteristics of a front-mounted brake structure. While the brake pedaling becomes more convenient after the device position is adjusted, the brake pedaling force is high, making it difficult for general nurses to operate. Furthermore, the device can easily deviate from its position due to the uneven force of the two arms holding the device handles.

[0008] The centered rear-mounted brake structure makes it easy to move and brake the equipment. When stepping on the brake, the operator holds the equipment handle with both hands, and the force of both arms is basically balanced, which makes it less likely to cause the equipment to deviate after braking. However, the problem is that the centered rear-mounted brake structure is relatively complex, and the products of various manufacturers are different. The brake structure forms are also different, and the quality effects are uneven. Some manufacturers' products have unsatisfactory braking effects, and they deviate during repeated exposure and use during surgery, which increases the difficulty of clinical judgment and becomes a serious defect in product quality. Summary of the Invention

[0009] In view of the above problems, the purpose of the present invention is to provide a brake structure for a mobile C-arm X-ray machine with strong stability, low locking pedal force, and convenient release of the foot brake.

[0010] The technical solution for realizing the present invention is as follows

[0011] A brake structure for a mobile C-arm X-ray machine includes a chassis, a brake buckle, a first brake assembly, and a second brake assembly; the brake buckle is located at the front end of the chassis, and the first brake assembly and the second brake assembly are relatively arranged on both sides of the rear end of the chassis; the brake buckle has a long axis, one end of the long axis extends to a position corresponding to the first brake assembly, and the other end of the long axis extends to a position corresponding to the second brake assembly; one end of the long axis is transmission-connected to the first brake assembly through a first connecting rod assembly, and the other end of the long axis is transmission-connected to the second brake assembly through a second connecting rod assembly.

[0012] The brake buckle is assembled from a double slider seat, a connecting bracket, a movable tongue, a guide rail, a copper sleeve, a bottom plate, a brake pedal, and a disengagement pedal;

[0013] The movable tongue is a double tongue with the same appearance and an arc-shaped back. Two guide rail holes are arranged on the inner side between the double tongues. The movable tongue is placed in the installation space between the double slider seats. The rear end of the movable tongue can reciprocate in the installation space through the two assembled guide rails.

[0014] The two sides of the double slider seat are equipped with connecting brackets, the copper sleeves are installed on the connecting brackets facing each other to keep concentric, and the long shaft is installed in series.

[0015] A brake pedal and a disengagement pedal are installed on the long axis above the base plate, and the brake pedal and the disengagement pedal are arranged between the connecting brackets; the brake pedal is fixedly connected to the long axis, and the disengagement pedal is movably connected to the long axis; a limit bracket is provided on the base plate below the disengagement pedal; the working ends of the brake pedal and the disengagement pedal respectively contact with the double protruding tongues of the movable stop tongue.

[0016] Compression springs are installed in the arc notches on both sides of the movable blocking tongue, one end of the compression spring abuts against the arc notch, and the other end abuts against the baffle.

[0017] The long shafts on both sides of the disengaging foot working end are sleeved with locking retaining rings.

[0018] The cylindrical linear guide rails between the cylindrical linear guide rails and the movable stop tongues are sleeved with bushings.

[0019] The first brake assembly and the second brake assembly are both assembled from a sleeve, a positioning washer, a sliding washer, a core shaft, a first spring, a telescopic core shaft, a top plate, and a brake chassis;

[0020] The telescopic core shaft is placed in the sleeve cavity and can move up and down in the sleeve. The outer surface of the top of the telescopic core shaft is provided with a step portion, the radius of the step portion is smaller than the radius of the telescopic core shaft, and a positioning washer is sleeved on the telescopic core shaft at the bottom of the sleeve. The large diameter section of the telescopic core shaft is clearance-matched with the positioning washer hole. The end of the telescopic core shaft located at the bottom outlet of the sleeve is connected to the brake chassis;

[0021] The core shaft includes a core shaft rod located outside the sleeve, a flange located inside the sleeve, and a cylindrical portion. The flange has a convex ring in the center and is assembled with a sliding washer. The cylindrical portion has a deep hole and long through-holes are opened on both sides of the cylindrical portion. A first spring is sleeved on the cylindrical portion outside the deep hole. One end of the first spring abuts against the flange and the other end abuts against the positioning washer.

[0022] The top of the core shaft rod is connected to the top plate, one end of the top plate is provided with a protruding limit block, and the other end is provided with a slope; the limit block end is a disengagement end corresponding to the disengagement pedal, and the slope end is a braking end corresponding to the braking pedal.

[0023] A reinforcement plate is also installed between the core shaft rod and the top plate.

[0024] A second spring is arranged in the deep hole of the cylindrical portion and is assembled with the countersunk hole on the top of the telescopic core shaft.

[0025] The first connecting rod assembly and the second connecting rod assembly both include a short connecting rod, a long connecting rod and a swing arm; the input end of the short connecting rod is connected to the long shaft, and the output end is connected to the long connecting rod; the protruding end in the middle of the swing arm is hinged on the thrust plate of the sleeve and can rotate around the hinge, the roller shaft at the top of the swing arm can roll along the top plate, and the input end at the bottom of the swing arm is connected to the output end of the long shaft.

[0026] The long slot hole and the telescopic core shaft below the countersunk hole are connected through a straight pin.

[0027] The above technical solution has been adopted, and the braking effect is good, the equipment is stable, the locking pedal force is small, and the release of the foot brake is convenient;

[0028] A brake structure of a mobile C-arm X-ray machine is installed on the chassis of the equipment as a complete unit, and acts on the brake after the equipment stops moving and after the clinical position is adjusted before surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the present invention;

[0030] Figure 2 This is a schematic diagram of the chassis structure of the present invention;

[0031] Figure 3 This is a schematic diagram of the brake buckle structure of the present invention;

[0032] Figure 4 This is a schematic diagram of the top view of the brake buckle of the present invention;

[0033] Figure 5 This is a schematic diagram of the disengaging footrest structure of the present invention;

[0034] Figure 6 This is a schematic diagram of the brake pedal structure of the present invention;

[0035] Figure 7 This is a schematic structural diagram of the brake assembly of the present invention;

[0036] Figure 8 AA cross-sectional structural diagram of the present invention;

[0037] Figure 9 This is a schematic diagram of the three-dimensional structure of the brake assembly of the present invention;

[0038] Figure 10 Schematic diagram of the connecting rod assembly structure of the present invention;

[0039] Figure 11 This is a schematic diagram of the copper sleeve structure of the present invention;

[0040] In the accompanying drawings, 1 is a chassis, 2 is a brake buckle, 3 is a first brake assembly, 4 is a second brake assembly, 5 is a long shaft, 6 is a first connecting rod assembly, 7 is a second connecting rod assembly, and 8 is a thrust plate;

[0041] 2.1 is the double slider seat, 2.2 is the connecting bracket, 2.3 is the movable tongue, 2.4 is the guide rail, 2.5 is the copper sleeve, 2.6 is the base plate, 2.7 is the brake pedal, 2.8 is the disengagement pedal, 2.9 is the limit bracket, 2.10 is the compression spring, 2.11 is the arc notch, 2.12 is the baffle, 2.13 is the locking ring, and 2.14 is the bushing;

[0042] 4.1 is a sleeve, 4.2 is a positioning washer, 4.3 is a sliding washer, 4.4 is a core shaft, 4.5 is a first spring, 4.6 is a telescopic core shaft, 4.7 is a top plate, 4.8 is a brake chassis, 4.9 is a step portion, 4.10 is a core shaft rod, 4.11 is a flange, 4.12 is a deep hole, 4.13 is a limit stop, 4.14 is a slope, 4.15 is a reinforcement plate, 4.16 is a second spring, 4.17 is a straight pin, and 4.18 is a cylindrical portion;

[0043] 6.1 is the short connecting rod, 6.2 is the long connecting rod, 6.3 is the swing arm, 6.4 is the protruding section, 6.5 is the roller shaft, 6.6 is the deep groove ball bearing, and 6.8 is the double row angular contact ball bearing. DETAILED DESCRIPTION

[0044] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] See also Figure 1-11 The present invention shows a schematic diagram of a brake structure for a mobile C-arm X-ray machine, comprising a chassis 1, a brake buckle 2, a first brake assembly 3, and a second brake assembly 4. The brake buckle 2 is located at the front end of the chassis 1, and the first and second brake assemblies are arranged on opposite sides of the rear end of the chassis 1. The brake buckle has a long shaft 5, one end of which extends to a position corresponding to the first brake assembly, and the other end of which extends to a position corresponding to the second brake assembly. One end of the long shaft 5 is connected to the first brake assembly via a first connecting rod assembly 6, and the other end of the long shaft 5 is connected to the second brake assembly via a second connecting rod assembly 7. The main components of the structure are the symmetrically arranged first brake assembly, the second brake assembly, and the brake buckle 2. The brake buckle 2 is equipped with a long shaft 5, which drives the long shaft 5 to rotate. The long shaft 5 and the connecting rod assembly cooperate to convert the rotational motion of the long shaft 5 into reciprocating motion of the brake chassis in the brake assembly.

[0046] The brake buckle 2 is assembled from a double slider seat 2.1, a connecting bracket 2.2, a movable tongue 2.3, a guide rail 2.4 (cylindrical linear guide rail), a copper sleeve 2.5, a bottom plate 2.6, a brake pedal 2.7, and a disengagement pedal 2.8; the movable tongue is a double tongue with the same appearance and an arc-shaped back, and two guide rail holes are arranged on the inner side between the double tongues. The movable tongue is placed in the installation space between the double slider seats and assembled with the double slider seats. The rear end of the movable tongue can reciprocate in the installation space through the two assembled cylindrical linear guide rails; the baffle is set at the rear end of the double slider seat, and connecting brackets are installed on both sides of the double slider seat. The copper sleeves are installed on the connecting brackets facing each other to maintain concentricity, and the long axis 5 is installed in series.

[0047] The brake pedal and the disengaging pedal are movably connected to the long shaft 5, and when the disengaging pedal rotates, it does not drive the long shaft 5 to rotate. At this time, the disengaging pedal working end will abut against the movable tongue, and as the disengaging pedal rotates, the movable tongue will also move to the rear end. At this time, the contact point between the brake pedal working end and the movable tongue will be loose, and the brake pedal drives the long shaft 5 to reset together, and indirectly drives the brake chassis to reset and no longer lock through the connecting rod group; a limit bracket 2.9 is provided on the bottom plate below the disengaging pedal, which is used to prevent the disengaging pedal from stepping on the bottom; the brake pedal and the disengaging pedal working ends respectively conflict with the double protruding tongues of the movable tongue.

[0048] When the disengaging foot is pressed down, the working end of the top of the limiting bracket abuts against the disengaging foot.

[0049] Compression springs 2.10 are installed in the arc notches on both sides of the movable tongue, one end of the compression spring abuts against the arc notch 2.11, and the other end abuts against the baffle 2.12. The compression spring is used to reset the movable tongue.

[0050] The major axis 5 on both sides of the described disengaging foot step working end is all sleeved with locking retaining ring 2.13. To disengaging foot step working end position limiting.

[0051] The cylindrical linear guide rails between the guide rails and the movable stop tongue are sleeved with bushings 2.14 (composite oil-free bushings) to protect the cylindrical linear guide rails.

[0052] The first brake assembly and the second brake assembly are both assembled by a sleeve 4.1, a positioning washer 4.2, a sliding washer 4.3, a core shaft 4.4, a first spring 4.5, a telescopic core shaft 4.6, a top plate 4.7, and a brake chassis 4.8; the telescopic core shaft is placed in the sleeve cavity and can move up and down in the sleeve, and a step portion 4.9 is provided on the outer surface of the top of the telescopic core shaft, and the radius of the step portion is smaller than the radius of the telescopic core shaft. A positioning washer is sleeved on the telescopic core shaft at the bottom of the sleeve, and the large diameter section of the telescopic core shaft is in clearance with the positioning washer hole. The end of the telescopic core shaft at the bottom outlet of the sleeve is connected to the brake chassis, and the reciprocating movement of the telescopic core shaft up and down in the sleeve will drive the brake chassis connected thereto to do telescopic movement. When the chassis is extended, it presses against the ground to achieve braking; the core shaft includes a core shaft rod 4.10 located outside the sleeve, a flange 4.11 located inside the sleeve and a cylindrical portion 4.18, the center of the flange is provided with a convex ring and a sliding washer, the cylindrical portion is provided with a deep hole 4.12, and both sides of the cylindrical portion are provided with through long slots; a first spring 4.5 is sleeved on the cylindrical portion outside the deep hole, one end of the first spring 4.5 presses against the flange 4.11, and the other end presses against the positioning washer 4.2; the top of the core shaft rod 4.10 is connected to the top plate 4.7, and the top plate has a protruding limit block 4.13 at one end and a slope 4.14 at the other end; the limit block end is the disengagement end corresponding to the disengagement pedal, and the slope end is the braking end corresponding to the braking pedal.

[0053] A reinforcement plate 4.15 is also installed between the core shaft rod and the top plate.

[0054] A second spring, 4.16 in diameter, is installed within the deep hole in the cylindrical section and engages the countersunk hole at the top of the telescopic mandrel. The second spring is a CSSWB rectangular spring. This design is intended to prevent single-point contact during braking due to uneven floors, potentially leading to brake failure. Based on a floor flatness standard of ≤5mm / ping, the main and compensating telescopic structures are employed. This ensures that the main spring thrust is applied to the highest point of the floor. The compensating spring thrust ensures that both the first and second brake assemblies simultaneously exert equal force on the ground, achieving optimal braking performance.

[0055] Both the first and second connecting rod assemblies include a short connecting rod 6.1, a long connecting rod 6.2, and a swing arm 6.3. The input end of the short connecting rod 6.1 is connected to the long shaft 5, and the output end is connected to the long connecting rod 5.2. The protruding end 6.4 in the middle of the swing arm 6.3 is hinged to the thrust plate 8 of the sleeve and can rotate about the hinge. The roller shaft 6.5 at the top of the swing arm can roll along the top plate 4.7. The input end of the bottom of the swing arm 6.3 is connected to the output end of the long shaft 5. Short connecting rods are installed at both ends of the long shaft 5 and are rigidly connected by cylindrical pins. The short connecting rod is connected to the long connecting rod via a pin shaft. The other end of the long connecting rod is connected to the first brake assembly and the second brake assembly, respectively. When the brake pedal is pressed, the short link deflects along the long axis 5, and the short link pulls the long link to move. The other end of the long link pulls the swing arms on the first brake assembly and the second brake assembly. The swing of the swing arms generates thrust or releases thrust. Because the first brake assembly and the second brake assembly are equipped with the first spring and the second spring, the telescopic core shaft and the core shaft move up and down.

[0056] The ends of the swing arm roller shaft 6.5 corresponding to the top plate 4.7 are provided with deep groove ball bearings 6.6. The protruding end of the swing arm is hinged to the thrust plate 8 of the sleeve 4.1 in conjunction with the double row angular contact ball bearing and is installed by pins.

[0057] The long slot hole and the telescopic core shaft below the countersunk hole are connected through a straight pin. The telescopic core shaft is connected to the cylindrical portion of the core shaft through the coordinated use of the long slot hole and the straight pin.

[0058] The following describes the installation process of the first brake assembly and the second brake assembly of the present invention:

[0059] The first brake assembly has the same features as the second brake assembly, except that the thrust plate 8 and the swing arm 6.3 are left and right.

[0060] The first brake assembly is assembled from a sleeve 4.1, a positioning washer 4.2, a sliding washer 4.3, a core shaft 4.4, a second spring 4.5, a telescopic core shaft 4.6, a first spring, a thrust plate 8, a swing arm, a pin, a double-row angular contact ball bearing, a roller shaft, a deep groove ball bearing, a top plate 4.7, and a reinforcement plate. Due to the flatness error of the floor, the first brake assembly must have main telescopic and compensating telescopic functions. A positioning washer is installed in the sleeve cavity and is tightened and fixed by an hexagon socket countersunk screw. The positioning washer is made of POM polyformaldehyde material and its function is to position and lubricate the telescopic core shaft when it moves up and down; the core shaft is taken out and a sliding washer is installed, which is tightened and fixed with an hexagon socket cylindrical head screw. The second spring is placed in the deep hole and then matched with the axis of the telescopic core shaft; a long slot hole is opened on the cylindrical part of the core shaft, and a pin hole is provided on the telescopic core shaft. The telescopic core shaft is fitted into the deep hole, and the second spring (the second spring adopts a CSSWB rectangular spring) is in an initial pre-compression state. The pin hole on the telescopic core shaft is within the range of the long slot hole on the core shaft, and then a straight pin is provided. As a result, the telescopic core shaft can smoothly apply force and extend and retract in the deep hole due to the elastic force of the second spring, and the amount of extension and retraction is the length of the deep hole on the core shaft.

[0061] The following describes the installation process of the brake buckle of the present invention:

[0062] The center line of the long axis 5 is the rotation center of the brake pedal 2.7 and the disengagement pedal 2.8. The movable tongue is a double convex tongue with the same appearance and an arc-shaped back. There are two holes on the movable tongue 2.3, which keep the same hole distance with the holes on the double slider seat. When the movable tongue is equipped with a composite oil-free bushing, the cylindrical linear guide 2.4 is installed, and then the whole is assembled with the double slider seat and tightened with a hexagon flat-end set screw. The movable tongue is required to slide smoothly relative to the double slider seat without getting stuck.

[0063] To sum up, compression springs 2.10 are installed in the arc notches on both sides of the movable tongue, and baffles 2.12 are installed on the double slider seat, which are connected and tightened with hexagonal countersunk screws. It is required that after the movable tongue is forced, it can slide smoothly relative to the double slider through the cylindrical linear guide without any jamming.

[0064] Take the copper sleeve and put it on the connecting bracket, then install the connecting bracket to the double slider assembly, fasten the hexagon socket head screw, and then install the long shaft 5, brake pedal and disengagement pedal, and locking ring in sequence, activate the long shaft 5, fasten the hexagon socket head screw on the connecting bracket, adjust the relative position of the brake pedal and disengagement pedal to the correct position, and the axial movement of the disengagement pedal is limited by the screw locking ring at both ends, and it is connected and tightened with the hexagon socket head screw. The brake pedal is temporarily connected and tightened with the hexagon socket head screw.

[0065] Take the base plate and install the limit bracket, connect and tighten it with the hexagon socket head screw, then assemble it with the double slider seat assembly, connect and tighten it with the hexagon socket countersunk screw. The function of the limit bracket is to limit the stepping of the disengaging pedal. When its top surface contacts the connecting rod arm in the disengaging pedal, it is disengaged from the movable tongue stuck in the brake pedal, thereby achieving the braking and disengaging effect of the entire machine.

[0066] The following describes the assembly process of the brake buckle and the first and second brake assemblies of the present invention:

[0067] During installation, first install the long connecting rods on the first brake assembly and the second brake assembly respectively, and then install them into the rear tray of the chassis as required, tighten and secure them with hexagon socket head screws, remove the brake buckle 2 structure and disassemble the connecting bracket, then install them into the rear tray of the chassis, and screw on the hexagon socket head screws to pre-tighten and secure them.

[0068] Take the long axis 5 and install the brake pedal and detach the pedal, the connecting bracket removed from the brake buckle 2 structure, and the right support seat, left support seat and short connecting rod respectively, and then place the whole on the V-shaped block of equal height. Pay attention to adjust the direction and position of the short connecting rods at both ends to be synchronized, screw on the hexagon socket head screws and tighten them, then drill the pin holes, insert the cylindrical pins, and remove the hexagon socket head screws for fixing the short connecting rods at both ends.

[0069] Install the entire long axis assembly into the rear tray of the chassis, and fix the right support seat and left support seat at both ends to the rear tray of the chassis with hexagon socket countersunk screws. Note that the hexagon socket countersunk screws are pre-tightened; reinstall the connecting bracket removed from the brake buckle 2 structure to its original position on the brake buckle 2 structure, use a pipe wrench to rotate the long axis back and forth to adjust the brake buckle 2 structure and the right support seat and left support seat to the accurate position, and tighten the screws to fix it.

[0070] In the initial state, the brake pedal and the release pedal are in a horizontally aligned position. Use a hexagon socket head screw to fix the brake pedal to the long axis, then drill a pin hole and insert a cylindrical pin to fix the brake pedal and the long axis, and remove the hexagon socket head screw.

[0071] The working principle of the present invention is described below:

[0072] When braking is needed: the brake pedal 2.7 is stepped on, and the brake pedal 2.7 drives the long shaft 5 to rotate. The rotational movement of the long shaft is transmitted to the swing arm 6.3 through the short connecting rod 6.1 and the long connecting rod 6.2. The swing arm will rotate around the hinge. The roller shaft 6.5 at the top of the swing arm will roll on the top plate from the end close to the limit block (hereinafter referred to as the zero position) to the slope of the top plate (hereinafter referred to as the braking position). At the same time, due to the slope structure of the top plate, the core shaft rod connected to the top plate will drive the flange to press down, indirectly causing the telescopic core shaft to drive the brake chassis to move downward. The chassis brake extends out of the mechanism and contacts the ground to achieve braking.

[0073] When the brakes are not needed: step on the disengagement pedal, the disengagement pedal will rotate around the long axis for a certain angle and then be supported by the limit bracket. At the same time, the working end of the disengagement pedal will push the movable tongue to the rear end for a certain distance. At this time, the movable tongue and the brake pedal are unlocked, and the long axis drives the connecting rod assembly to return to the initial position, thereby driving the swing arm to rotate, and the roller shaft at the top of the swing arm will return from the braking position to the zero position; since the roller shaft returns to the zero position, the telescopic core shaft will move upward under the drive of the first and second springs, and drive the brake chassis to return to its initial position.

Claims

1. A brake structure for a mobile C-arm X-ray machine, characterized in that: The brake buckle comprises a chassis, a brake buckle, a first brake assembly and a second brake assembly; the brake buckle is located at the front end of the chassis, and the first brake assembly and the second brake assembly are relatively arranged on both sides of the rear end of the chassis; the brake buckle has a long axis, one end of the long axis extends to a position corresponding to the first brake assembly, and the other end of the long axis extends to a position corresponding to the second brake assembly; one end of the long axis is transmission-connected to the first brake assembly through a first connecting rod assembly, and the other end of the long axis is transmission-connected to the second brake assembly through a second connecting rod assembly; the brake buckle is assembled from a double slider seat, a connecting bracket, a movable tongue, a guide rail, a copper sleeve, a base plate, a brake pedal, and a disengagement pedal; The movable tongue is a double-bulged tongue tongue, and two guide rail holes are arranged on the inner side between the double-bulged tongues. The movable tongue is placed in the installation space between the double slider seats, and the rear end of the movable tongue can reciprocate in the installation space through the two assembled guide rails; Connecting brackets are installed on both sides of the double slider seat, and the copper sleeves are installed on the connecting brackets facing each other to maintain concentricity, and the long shaft is installed in series; A brake pedal and a disengagement pedal are mounted on the long axis above the base plate, and the brake pedal and the disengagement pedal are arranged between the connecting brackets; the brake pedal is fixedly connected to the long axis, and the disengagement pedal is movably connected to the long axis; a limit bracket is provided on the base plate below the disengagement pedal; the working ends of the brake pedal and the disengagement pedal respectively contact the double protruding tongues of the movable stop tongue; The first brake assembly and the second brake assembly are both assembled from a sleeve, a positioning washer, a sliding washer, a core shaft, a first spring, a telescopic core shaft, a top plate, and a brake chassis; The telescopic core shaft is placed in the sleeve cavity and can move up and down in the sleeve. The outer surface of the top of the telescopic core shaft is provided with a step portion, the radius of the step portion is smaller than the radius of the telescopic core shaft, and a positioning washer is sleeved on the telescopic core shaft at the bottom of the sleeve. The large diameter section of the telescopic core shaft is clearance-matched with the positioning washer hole. The end of the telescopic core shaft located at the bottom outlet of the sleeve is connected to the brake chassis; The core shaft includes a core shaft rod located outside the sleeve, a flange located inside the sleeve, and a cylindrical portion. The flange has a convex ring in the center and is assembled with a sliding washer. The cylindrical portion has a deep hole and long through-holes are opened on both sides of the cylindrical portion. A first spring is sleeved on the cylindrical portion outside the deep hole. One end of the first spring abuts against the flange and the other end abuts against the positioning washer. The top of the core shaft is connected to the top plate, one end of the top plate has a protruding limit stopper, and the other end has a slope; the limit stopper end is the disengagement end corresponding to the disengagement foot, and the slope end is the braking end corresponding to the braking foot; The first connecting rod assembly and the second connecting rod assembly both include a short connecting rod, a long connecting rod and a swing arm; the input end of the short connecting rod is connected to the long shaft, and the output end is connected to the long connecting rod; the protruding end in the middle of the swing arm is hinged on the thrust plate of the sleeve and can rotate around the hinge, the roller shaft at the top of the swing arm can roll along the top plate, and the input end at the bottom of the swing arm is connected to the output end of the long shaft.

2. The brake structure of a mobile C-arm X-ray machine according to claim 1, characterized in that: Compression springs are installed in the arc notches on both sides of the movable blocking tongue, one end of the compression spring abuts against the arc notch, and the other end abuts against the baffle.

3. The brake structure of a mobile C-arm X-ray machine according to claim 1, characterized in that: The long shafts on both sides of the disengaging foot working end are sleeved with locking retaining rings.

4. The brake structure of a mobile C-arm X-ray machine according to claim 1, characterized in that: Bushings are sleeved on the guide rails between the guide rails and the movable blocking tongues.

5. The brake structure of a mobile C-arm X-ray machine according to claim 1, characterized in that: A reinforcement plate is also installed between the core shaft rod and the top plate.

6. The brake structure of a mobile C-arm X-ray machine according to claim 1, characterized in that: A second spring is arranged in the deep hole of the cylindrical portion and is assembled with the countersunk hole on the top of the telescopic core shaft.

7. The brake structure of a mobile C-arm X-ray machine according to claim 1, characterized in that: The long slot hole and the telescopic core shaft below the countersunk hole are connected through a straight pin.

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