A lever mechanism of a rail transit brake clamp convenient to maintain

Abstract

The application relates to a lever mechanism of a rail transit brake clamp convenient to maintain, belonging to the field of rail transit brake clamps, which comprises a lever body, an axial hole is formed in the left side of the bottom of the lever body, a bushing is fixed in the inner cavity of the axial hole, a U-shaped groove is formed in the upper surface of the lever body, and a sleeve rod penetrating through the lever body and extending into the U-shaped groove is arranged at the left and right ends of the upper surface of the lever body. The lever mechanism of the rail transit brake clamp convenient to maintain is provided with a clamping plate on the lower surface of the positioning plate, when the clamping plate enters the annular groove, the clamping plate can provide a limiting action on the fixed screw plug, so that when the fixed screw plug is adjusted or limited, the two sides of the clamping plate only need to be pulled and moved away from the fixed block, the efficiency of adjusting or limiting the fixed screw plug is greatly improved, meanwhile, the staff can conveniently install and dismount the pressing block, the operation is relatively simple, and the staff can quickly maintain.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rail transit brake caliper, in particular to a lever mechanism of rail transit brake caliper convenient to maintain. BACKGROUND

[0002] The rail transit brake caliper is a key executive component in the basic brake device of the rail transit vehicle, which functions to clamp the brake disc during braking, generate braking force through friction, and slow down or stop the vehicle. The brake caliper usually includes a lever, a hanger seat, a brake pad holder, a brake pad holder hanger, and other main load-bearing components. The lever mainly bears the brake clamping force in the brake caliper, and drives the brake pad to press against the brake disc through rotation, thereby achieving braking.

[0003] Through retrieval, it is found that the Chinese patent No. CN105292172A discloses a lever mechanism of rail transit brake caliper, which has a lever body. The middle part of the lever body is provided with an axle hole. One end of the lever body is provided with a top block mechanism. The top block mechanism has a top block body, which has two coaxial connecting shafts. The top block body is provided with a radial positioning hole. The top block body is provided with a mounting hole. A fixing screw plug is arranged in the mounting hole. The front end surface of the fixing screw plug is provided with a counterbore. A pressing block is arranged in the counterbore. The other end of the lever body is provided with a pad. After the rail transit brake caliper uses the lever mechanism, the pressing block of the top block mechanism can always maintain maximum area contact with the output shaft of the brake cylinder, effectively improving the efficiency of transmitting braking force. When the pressing block or the pad is worn out, only the parts need to be replaced, and the maintenance cost is low. When a fault occurs, manual relief can be achieved by adjusting the fixing screw plug in the top block mechanism, which is simple to operate.

[0004] In the present application, the limiting screw is threadedly connected with the positioning hole, but no limiting mechanism is arranged on the limiting screw. If the limiting screw rotates, the end of the limiting screw moves out of the inner cavity of the circumferential limiting groove, resulting in poor limiting effect on the fixing screw plug. When adjusting the fixing screw plug, the limiting screw needs to be rotated out with the help of a tool, thereby reducing the installation efficiency. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a lever mechanism of rail transit brake caliper convenient to maintain, which has the advantages of being able to limit the fixing screw plug, etc. The problem of the prior art that the limiting screw is threadedly connected with the positioning hole, but no limiting mechanism is arranged on the limiting screw, if the limiting screw rotates, the end of the limiting screw moves out of the inner cavity of the circumferential limiting groove, resulting in poor limiting effect on the fixing screw plug, and when adjusting the fixing screw plug, the limiting screw needs to be rotated out with the help of a tool, thereby reducing the installation efficiency is solved.

[0006] In order to achieve the above object, the present application provides the following technical scheme: A lever mechanism of rail transit brake clamp convenient to maintain, comprising a lever body, an axial hole is formed in the left side of the bottom of the lever body, a bushing is fixed in the inner cavity of the axial hole, a U-shaped groove is formed in the upper surface of the lever body, a sleeve rod penetrating through the lever body and extending into the U-shaped groove is arranged at the left and right ends of the upper surface of the lever body, a fixed block is fixed between the opposite sides of the two sleeve rods, a threaded hole is formed in the middle of the front surface of the fixed block, a fixed screw plug is threadedly connected in the inner cavity of the threaded hole, a limiting mechanism for limiting the fixed screw plug is arranged on the upper and lower sides of the fixed block, and a convenient assembly component is arranged on the front surface of the fixed screw plug.

[0007] The limiting mechanism comprises a jack inserted into the upper and lower sides of the fixed block, the upper and lower sides of the fixed block are provided with positioning plates, cavities are formed in the left and right ends of the inner cavities of the positioning plates, a connecting rod is fixed between the opposite sides of the left and right side walls in the inner cavities of the cavities, a movable plate is slidably connected to the outer surface of the connecting rod, a telescopic rod is fixed to the bottom between the opposite sides of the cavities and the movable plate, a return spring is movably sleeved on the outer surface of the telescopic rod, a linkage plate is fixed to the upper surface of the movable plate, positioning blocks are fixed to the bottom between the opposite sides of the left and right ends of the linkage plate, a sunken groove is formed in the left and right ends of the upper and lower sides of the fixed block, a positioning groove is formed in the opposite side of the left and right ends of the sunken groove, and a pull plate is fixed to the opposite side of the left and right ends of the linkage plate.

[0008] Further, the size of the inner cavity of the U-shaped groove is greater than the size of the fixed block, and the fixed screw plug is threadedly connected with the threaded hole.

[0009] Further, an annular groove is formed in the outer side of the fixed screw plug, and clamping plates are fixed to the opposite sides of the upper and lower sides of the positioning plates.

[0010] Further, the size of the clamping plate is matched with the size of the jack, a sliding block is fixed to the lower surface of the movable plate, a sliding groove is formed in the inner bottom wall of the cavity, and the sliding block moves horizontally in the inner cavity of the sliding groove.

[0011] Further, the two ends of the return spring are fixedly connected between the opposite sides of the cavities and the movable plate, and a through hole is formed in the opposite side of the left and right ends of the cavity.

[0012] Further, the cross-sectional shape of the linkage plate is inverted L-shaped, and the size of the linkage plate is matched with the size of the inner cavity of the through hole.

[0013] Further, the size of the inner cavity of the sunken groove is matched with the size of the linkage plate, and the size of the positioning block is matched with the size of the inner cavity of the positioning groove.

[0014] Further, a finger insertion hole is formed on the left side of the pull plate.

[0015] Further, the convenient assembly component comprises a connecting groove formed on the front surface of the fixing screw plug, a connecting plate is threadedly connected in the inner cavity of the connecting groove, and a pressing block is fixed on the front surface of the connecting plate.

[0016] Further, a finger accommodating groove is formed on the front surface of the pressing block, and the number of the finger accommodating grooves is two.

[0017] Compared with the prior art, the technical scheme has the following beneficial effects:

[0018] The lever mechanism of the rail transit brake clamp convenient to maintain is provided with a clamping plate on the lower surface of the positioning plate, and the clamping plate can provide a limiting action on the fixing screw plug when the clamping plate enters the annular groove, so that when the fixing screw plug is adjusted or limited, it is only necessary to pull the pull plates on both sides and move away from the fixed block, thereby greatly improving the efficiency of adjusting or limiting the fixing screw plug, and facilitating the installation and disassembly of the pressing block by the staff, and the operation is relatively simple and convenient for the staff to quickly maintain. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic view of the present application;

[0020] Figure 2 It is a structural schematic view of the limiting mechanism of the present application;

[0021] Figure 3 It is a structural schematic view of the positioning plate of the present application;

[0022] Figure 4 It is a structural schematic view of the convenient assembly component of the present application.

[0023] In the figure: 1 lever body, 2 axial hole, 3 bushing, 4 U-shaped groove, 5 sleeve rod, 6 fixed block, 7 threaded hole, 8 fixing screw plug, 9 limiting mechanism, 901 jack, 902 positioning plate, 903 cavity, 904 connecting rod, 905 movable plate, 906 telescopic rod, 907 return spring, 908 linkage plate, 909 positioning block, 910 sink groove, 911 positioning groove, 912 pull plate, 10 convenient assembly component, 101 connecting groove, 102 connecting plate, 103 pressing block. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0025] Please refer to Figure 1 The lever mechanism of the rail transit brake clamp convenient to maintain in the embodiment comprises a lever body 1, an axial hole 2 is formed in the left side of the bottom of the lever body 1, a bushing 3 is fixed in the inner cavity of the axial hole 2, a U-shaped groove 4 is formed in the upper surface of the lever body 1, a sleeve rod 5 extending through the lever body 1 and extending into the U-shaped groove 4 is arranged at each of the left and right ends of the upper surface of the lever body 1, a fixed block 6 is fixed between the opposite sides of the two sleeve rods 5, a threaded hole 7 is formed in the middle of the front surface of the fixed block 6, a fixed screw plug 8 is threadedly connected in the inner cavity of the threaded hole 7, a limiting mechanism 9 for limiting the fixed screw plug 8 is arranged on the upper and lower sides of the fixed block 6, and a convenient assembly component 10 is arranged on the front surface of the fixed screw plug 8.

[0026] In the embodiment, the size of the inner cavity of the U-shaped groove 4 is greater than the size of the fixed block 6, and the fixed screw plug 8 is threadedly connected with the threaded hole 7.

[0027] It should be noted that the EMU brake system maintenance includes a CR400AF simulation brake control device, the CR400AF simulation brake control device mainly comprises an EBCU (electronic control unit), a pressure switch function module, a supply air and air spring control function module, a brake control function module, and a parking function module, the brake control function module of the brake system comprises a closed cock, a pressure measuring connector, a pressure sensor, an air vehicle valve, an emergency switching electromagnetic valve, an emergency electromagnetic valve, an electric control change valve, and a relay valve, and the module is mainly used for vehicle brake pressure control, and different brake pressures are output through air spring pressure and brake level, and air spring pressure cutting and brake pressure cutting can also be performed.

[0028] Please refer to Figures 2-3In order to provide the limiting effect for the fixed screw plug 8, the limiting mechanism 9 in the embodiment includes the insertion hole 901 opened on the upper and lower sides of the fixed block 6, and the positioning plate 902 is arranged on the upper and lower sides of the fixed block 6. The positioning plate 902 is placed on the upper and lower sides of the insertion hole 901, and the clamping plate on the opposite side of the two positioning plates 902 is inserted through the insertion hole 901. The cavities 903 are opened on the left and right ends of the inner cavity of the positioning plate 902, and the connecting rod 904 is fixed between the opposite sides of the left and right side walls of the inner cavity of the cavity 903. The outer surface of the connecting rod 904 is slidingly connected with the movable plate 905. The bottom between the opposite side of the cavity 903 and the movable plate 905 is fixed with the telescopic rod 906. The outer surface of the telescopic rod 906 is movably sleeved with the return spring 907. The upper surface of the movable plate 905 is fixed with the linkage plate 908. The bottom between the opposite sides of the left and right ends of the linkage plate 908 is fixed with the positioning block 909. The left and right ends of the upper and lower sides of the fixed block 6 are provided with the sunken groove 910. The opposite sides of the left and right ends of the sunken groove 910 are provided with the positioning groove 911. The opposite sides of the left and right ends of the linkage plate 908 are fixed with the pull plate 912. The movement of the two pull plates 912 drives the opposite movement of the two linkage plates 908. The opposite movement of the two linkage plates 908 makes the positioning block 909 move and causes the telescopic rod 906 and the return spring 907 to be extruded. The movement of the linkage plate 908 drives the movable plate 905 to move on the outer surface of the connecting rod 904, so that the distance between the two linkage plates 908 is increased.

[0029] In the embodiment, the outer side of the fixed screw plug 8 is provided with an annular groove. The opposite sides of the upper and lower positioning plates 902 are fixed with the clamping plate. The width of the clamping plate is matched with the width of the annular groove. The size of the clamping plate is matched with the size of the insertion hole 901. The lower surface of the movable plate 905 is fixed with the sliding block. The inner bottom wall of the cavity 903 is provided with the sliding groove. The sliding block moves horizontally in the inner cavity of the sliding groove.

[0030] The positioning plate 902 is moved downward, so that the lower surface of the positioning plate 902 is attached to the fixed block 6. The bottom of the linkage plate 908 and the positioning block 909 can enter the inner cavity of the sunken groove 910. At this time, the limiting of the two pull plates 912 is released. The return spring 907 rebounds without being limited and drives the telescopic rod 906 to be elongated, so that the two movable plates 905 move on the outer surface of the connecting rod 904. The movement of the movable plate 905 drives the linkage plate 908 to move, so that the positioning block 909 enters the inner cavity of the positioning groove 911, so that the clamping plate can be clamped into the annular groove on the fixed screw plug 8. The upper and lower sides of the fixed screw plug 8 can be limited.

[0031] The two ends of the reset spring 907 are fixedly connected with the cavity 903 and the side opposite to the movable plate 905, respectively, the side opposite to the cavity 903 of the left and right ends is provided with a through hole, the cross section shape of the linkage plate 908 is inverted L shape, the size of the linkage plate 908 is matched with the size of the inner cavity of the through hole, the size of the inner cavity of the sinking groove 910 is matched with the size of the linkage plate 908, and the size of the positioning block 909 is matched with the size of the inner cavity of the positioning groove 911.

[0032] It can be understood that the position of the clamping plate can be fixed by fixing the positioning plate 902 and the fixed block 6 through the positioning block 909 and the positioning groove 911, so that the fixed screw plug 8 can be stably positioned, when the fixed screw plug 8 is adjusted, the two pull plates 912 are pulled and moved, the positioning plate 902 can be separated from the fixed block 6, the movement of the positioning plate 902 drives the clamping plate to move out of the annular groove, so that the fixed screw plug 8 can be adjusted.

[0033] In addition, the left side of the pull plate 912 is provided with a finger insertion hole, the fingers are inserted into the finger insertion hole provided on the left side of the pull plate 912, and the two pull plates 912 are moved by the staff.

[0034] It should be noted that the clamping plate is arranged on the lower surface of the positioning plate 902, when the clamping plate enters the annular groove, the fixed screw plug 8 can be limited, so that when the fixed screw plug 8 is adjusted or limited, the two pull plates 912 on the two sides are only pulled and moved away from the fixed block 6, which greatly improves the efficiency of adjusting or limiting the fixed screw plug 8.

[0035] Please refer to Figure 4 In order to facilitate the staff to disassemble and replace the pressing block 103, the convenient assembly 10 in the embodiment comprises a connecting groove 101 provided on the front surface of the fixed screw plug 8, and the inner cavity of the connecting groove 101 is threadedly connected with a connecting plate 102, and the front surface of the connecting plate 102 is fixedly connected with the pressing block 103.

[0036] In the embodiment, the front surface of the pressing block 103 is provided with a finger accommodating groove, the number of the finger accommodating groove is two, two fingers are respectively put into the inner cavity of the finger accommodating groove, then the connecting plate 102 is aligned with the connecting groove 101 by pinching, and the connecting plate 102 is screwed into the inner cavity of the connecting groove 101 until the pressing block 103 completely enters the inner cavity of the connecting groove 101, so that the pressing block 103 can be fixed in the inner cavity of the connecting groove 101, which is convenient for the staff to install and disassemble the pressing block 103, and the operation is relatively simple, and it is convenient for the staff to quickly maintain.

[0037] It can be understood that the end of the rod is passed through the lever mounting hole on the support seat of the clamp shell into the axial hole 2 on the lever body 1, the lever body 1 is fixed with the clamp shell, the pressing block 103 in the fixed block 6 is opposite to the output shaft of the brake cylinder, then the brake cylinder is started, the output shaft of the brake cylinder is extended to press the pressing block 103 in the fixed block 6, at this time the lever body 1 is forced to rotate along the axial hole 2, and then the lever body 1 is rotated.

[0038] The working principle of the above embodiment is:

[0039] (1) In use, first, the fixed plug 8 is screwed into the inner cavity of the threaded hole 7. In order to limit the fixed plug 8, the positioning plates 902 are placed on the upper and lower sides of the insertion hole 901, and the clamping plates on the opposite sides of the two positioning plates 902 are inserted through the insertion hole 901. At this time, the fingers are inserted into the finger insertion hole on the left side of the pull plate 912, and then the two pull plates 912 are moved away from the positioning plates 902. The movement of the two pull plates 912 drives the two linkage plates 908 to move away from each other. The movement of the two linkage plates 908 causes the positioning block 909 to move and press the telescopic rod 906 and the return spring 907. The movement of the linkage plate 908 drives the movable plate 905 to move on the outer surface of the connecting rod 904, so that the distance between the two linkage plates 908 increases. Then move the positioning plate 902 downward, so that the lower surface of the positioning plate 902 is attached to the fixed block 6, and the bottom of the linkage plate 908 and the positioning block 909 enter the inner cavity of the sunken groove 910. At this time, the limitation of the two pull plates 912 is released, and the return spring 907 rebounds and drives the telescopic rod 906 to elongate, so that the two movable plates 905 move on the outer surface of the connecting rod 904. The movement of the movable plate 905 drives the linkage plate 908 to move, so that the positioning block 909 enters the inner cavity of the positioning groove 911, so that the clamping plate can be clamped into the annular groove on the fixed plug 8, and the upper and lower sides of the fixed plug 8 can be limited. By positioning the positioning block 909 and the positioning groove 911, the positioning plate 902 and the fixed block 6 are fixed, so that the position of the clamping plate is fixed, thereby providing stable limiting for the fixed plug 8. When adjusting the fixed plug 8, pull the pull plates 912 on both sides and move them to separate the positioning plate 902 from the fixed block 6. The movement of the positioning plate 902 drives the clamping plate to move out of the annular groove, so that the fixed plug 8 can be adjusted.

[0040] (2) two fingers are respectively placed into the inner cavities of the finger accommodating grooves, then the connecting plates 102 are pinched to align with the connecting grooves 101, and the connecting plates 102 are screwed into the inner cavities of the connecting grooves 101 until the pressing blocks 103 completely enter the inner cavities of the connecting grooves 101, the pressing blocks 103 can be fixed in the inner cavities of the connecting grooves 101, then one end of one rod is passed through the lever mounting hole on the clamping jaw shell support seat into the axial hole 2 on the lever body 1, the lever body 1 and the clamping jaw shell can be fixed, so that the pressing block 103 in the fixed block 6 is opposite to the output shaft of the brake cylinder, then the brake cylinder is started, the output shaft of the brake cylinder is stretched out to press the pressing block 103 in the fixed block 6, at this time the lever body 1 is stressed to rotate along the axial hole 2, and then the lever body 1 is rotated.

[0041] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises... a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element.

[0042] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, alternatives, and variations can be made in the embodiments without departing from the spirit and scope of the present application.

Claims

1. A lever mechanism of a rail transit brake caliper that is easy to maintain, comprising a lever body (1), characterized in that: The left side of the bottom of the lever body (1) is provided with an axial hole (2), the inner cavity of the axial hole (2) is fixedly provided with a bushing (3), the upper surface of the lever body (1) is provided with a U-shaped groove (4), the left and right ends of the upper surface of the lever body (1) are both provided with a sleeve rod (5) penetrating through the lever body (1) and extending into the U-shaped groove (4), the opposite sides of the two sleeve rods (5) are fixedly provided with a fixed block (6), the middle part of the front surface of the fixed block (6) is provided with a threaded hole (7), the inner cavity of the threaded hole (7) is threadedly connected with a fixed screw plug (8), the upper and lower sides of the fixed block (6) are both provided with a limiting mechanism (9) for limiting the fixed screw plug (8), and the front surface of the fixed screw plug (8) is provided with a convenient assembly component (10). The limiting mechanism (9) comprises a jack (901) provided on the upper and lower sides of the fixed block (6), the upper and lower sides of the fixed block (6) are both provided with a positioning plate (902), the left and right ends of the inner cavity of the positioning plate (902) are both provided with a cavity (903), the opposite sides of the left and right side walls in the inner cavity of the cavity (903) are fixedly provided with a connecting rod (904), the outer surface of the connecting rod (904) is slidably connected with a movable plate (905), the bottom between the cavity (903) and the opposite side of the movable plate (905) is fixedly provided with an extension rod (906), the outer surface of the extension rod (906) movably sleeved with a reset spring (907), the upper surface of the movable plate (905) is fixedly provided with a linkage plate (908), the bottom between the opposite sides of the linkage plate (908) is fixedly provided with a positioning block (909), the left and right ends of the upper and lower sides of the fixed block (6) are both provided with a sunken groove (910), and the opposite sides of the sunken grooves (910) are both provided with a positioning groove (911).

2. A lever mechanism for a rail transit brake caliper that is easy to maintain according to claim 1, characterized in that: The size of the inner cavity of the U-shaped groove (4) is greater than the size of the fixed block (6), and the fixed screw plug (8) is threadedly connected with the threaded hole (7).

3. A lever mechanism for a rail transit brake caliper that is easy to maintain, according to claim 1, characterized in that: The outer side of the fixed screw plug (8) is provided with an annular groove, and the opposite sides of the positioning plates (902) on the upper and lower sides are both fixedly provided with a clamping plate, the width of the clamping plate is matched with the width of the annular groove.

4. A lever mechanism for a rail transit brake caliper that is easy to maintain according to claim 3, characterized in that: The size of the clamping plate is matched with the size of the jack (901), the lower surface of the movable plate (905) is fixedly provided with a sliding block, the inner bottom wall of the cavity (903) is provided with a sliding groove, and the sliding block moves horizontally in the inner cavity of the sliding groove.

5. A lever mechanism for a rail transit brake caliper that is easy to maintain, according to claim 1, characterized in that: The two ends of the reset spring (907) are fixedly connected with the opposite sides of the cavity (903) and the movable plate (905), respectively, and the opposite sides of the left and right ends of the cavity (903) are both provided with a through hole.

6. A lever mechanism for a rail transit brake caliper that is easy to maintain according to claim 5, characterized in that: The cross-sectional shape of the linkage plate (908) is inverted L-shaped, and the size of the linkage plate (908) is matched with the size of the inner cavity of the through hole.

7. A lever mechanism for a rail transit brake caliper that facilitates maintenance, according to claim 1, characterized in that: The size of the inner cavity of the sunken groove (910) is matched with the size of the linkage plate (908), and the size of the positioning block (909) is matched with the size of the inner cavity of the positioning groove (911).

8. A lever mechanism for a rail transit brake caliper that is easy to maintain, according to claim 1, characterized in that: The left side of the pull plate (912) is provided with a finger insertion hole.

9. A lever mechanism for a rail transit brake caliper that facilitates maintenance, according to claim 1, characterized in that: The convenient assembly (10) comprises a connecting groove (101) formed on the front surface of the fixing screw plug (8), and the inner cavity of the connecting groove (101) is in threaded connection with a connecting plate (102), and the front surface of the connecting plate (102) is fixedly connected with a pressing block (103).

10. A lever mechanism for a rail transit brake caliper that facilitates maintenance, according to claim 9, characterized in that: The front surface of the pressing block (103) is provided with a finger accommodating groove, and the number of the finger accommodating grooves is two.

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