Lever mechanism of rail transit brake clamp convenient to maintain

Abstract

The invention relates to a rail transit brake clamp lever mechanism convenient to maintain, and belongs to the field of rail transit brake clamps, the rail transit brake clamp lever mechanism comprises a lever body, an axial hole is formed in the left side of the bottom of the lever body, a lining is fixed to an inner cavity of the axial hole, and a U-shaped groove is formed in the upper surface of the lever body; the left end and the right end of the upper surface of the lever body are each provided with a loop bar, and one end of each loop bar penetrates through the lever body and extends into the U-shaped groove. According to the rail transit brake clamp lever mechanism convenient to maintain, a clamping plate is arranged on the lower surface of a positioning plate, when the clamping plate enters an annular groove, a limiting effect can be provided for a fixing plug, and therefore when the fixing plug is adjusted or limited, only pulling plates on the two sides need to be pulled and move towards the side away from a fixing block, and the fixing plug can be adjusted or limited. The efficiency of adjusting or limiting the fixed plug is greatly improved, meanwhile, a worker can conveniently mount and dismount the pressing block, operation is easy and convenient, and rapid maintenance by the worker is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of rail transit brake calipers, in particular to a lever mechanism of a rail transit brake caliper which is easy to maintain. Background Art

[0002] The rail transit brake caliper is a key actuator in the basic braking device of rail transit vehicles. Its function is to clamp the brake disc during braking and generate braking force through friction to slow down or stop the vehicle. The brake caliper usually includes main bearing parts such as levers, hangers, brake pad supports, and brake pad support hangers. The lever in the brake caliper mainly bears the brake clamping force, and its rotation drives the brake pad to press the brake disc to achieve braking.

[0003] Through searching, it was found that Chinese patent announcement number: CN105292172A discloses a lever mechanism of a rail transit brake caliper, which has a lever body, an axial hole is opened in the middle of the lever body, and a top block mechanism is provided at one end of the lever body, and the top block mechanism has a top block body, and the top block body has two coaxial connecting shafts, and a radial positioning hole is provided on the top block body, and a mounting hole is opened on the top block body, and a fixing screw plug is installed in the mounting hole, and a countersunk hole is provided on the front end surface of the fixing screw plug, and a pressure block is installed in the countersunk hole, and a cushion block is provided at the other end of the lever body. After the rail transit brake caliper uses this lever mechanism, the pressure block of the top block mechanism and the output shaft of the brake cylinder can always maintain the maximum area contact, which effectively improves the efficiency of transmitting the braking force; when the pressure block or the cushion block is worn, only the parts need to be replaced, and the maintenance cost is low; when a fault occurs, only the fixing screw plug in the top block mechanism needs to be adjusted to achieve manual relief, and the operation is simple.

[0004] In this invention, the limit screw and the positioning hole are threadedly connected, but no limit mechanism is set on the limit screw. If the limit screw rotates, one end of the limit screw will move out from the inner cavity of the circumferential limit groove, resulting in poor limiting effect on the fixing screw plug. When adjusting the fixing screw plug, the limit screw needs to be unscrewed with the help of a tool, thereby reducing the installation efficiency. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a lever mechanism for a rail transit brake caliper that is easy to maintain and has the advantages of being able to limit the fixing screw plug, etc., solving the problem of a threaded connection between the limit screw and the positioning hole in the prior art, but no limiting mechanism is provided on the limit screw. If the limit screw rotates, one end of the limit screw will move out of the inner cavity of the circumferential limit groove, resulting in poor limiting effect on the fixing screw plug. When adjusting the fixing screw plug, the limit screw needs to be unscrewed with the help of a tool, thereby reducing the installation efficiency.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a lever mechanism of a rail transit brake caliper that is easy to maintain, comprising a lever body, an axial hole is provided on 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 provided on the upper surface of the lever body, and sleeve rods with one end penetrating the lever body and extending into the U-shaped groove are provided at both left and right ends of the upper surface of the lever body, a fixing block is fixed between opposite sides of the two sleeve rods, a threaded hole is provided in the middle of the front of the fixing block, a fixing screw plug is threadedly connected to the inner cavity of the threaded hole, a limiting mechanism for limiting the fixing screw plug is provided on the upper and lower sides of the fixing block, and a convenient assembly is provided on the front of the fixing screw plug;

[0007] The limiting mechanism includes jacks provided on the upper and lower sides of the fixed block, positioning plates are provided on the upper and lower sides of the fixed block, cavities are provided on the left and right ends of the inner cavity of the positioning plate, a connecting rod is fixed between the opposite sides of the left and right side walls of the cavity, a movable plate is slidably connected to the outer surface of the connecting rod, a telescopic rod is fixed to the bottom between the cavity and the opposite side of the movable plate, a return spring is provided on the movable sleeve of the outer surface of the telescopic rod, a linkage plate is fixed to the upper surface of the movable plate, and positioning blocks are fixed to the bottom between the opposite sides of the linkage plates at the left and right ends, sink grooves are provided on the left and right ends of the upper and lower sides of the fixed block, and positioning grooves are provided on the opposite sides of the sink grooves at the left and right ends, and pull plates are fixed on the opposite sides of the linkage plates at the left and right ends.

[0008] Furthermore, the size of the inner cavity of the U-shaped groove is larger than the size of the fixing block, and the fixing screw plug is threadedly connected to the threaded hole.

[0009] Furthermore, an annular groove is provided on the outer side of the fixing screw plug, and clamping plates are fixed on opposite sides of the upper and lower positioning plates, and the width of the clamping plates is adapted to the width of the annular groove.

[0010] Furthermore, the size of the card plate is adapted to the size of the jack, a slider is fixed to the lower surface of the movable plate, a slide groove is provided on the inner bottom wall of the cavity, and the slider performs horizontal linear motion in the inner cavity of the slide groove.

[0011] Furthermore, the two ends of the return spring are respectively fixedly connected to the cavity and the opposite side of the movable plate, and the opposite sides of the cavities at the left and right ends are both provided with through holes.

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

[0013] Furthermore, the size of the inner cavity of the sinking 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] Furthermore, a finger insertion hole is provided on the left side of the pull plate.

[0015] Furthermore, the casual wear component includes a connecting groove opened on the front side of the fixing screw plug, the inner cavity of the connecting groove is threadedly connected with a connecting plate, and a pressure block is fixed on the front side of the connecting plate.

[0016] Furthermore, a finger receiving groove is provided on the front side of the pressing block, and the number of the finger receiving grooves is two.

[0017] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0018] The lever mechanism of the rail transit brake caliper which is easy to maintain has a clamping plate on the lower surface of the positioning plate. When the clamping plate enters the annular groove, it can provide a limiting effect on the fixed screw plug. Therefore, when adjusting or limiting the fixed screw plug, it is only necessary to pull the pull plates on both sides and move them to the side away from the fixed block, which greatly improves the efficiency of adjusting or limiting the fixed screw plug. At the same time, it is convenient for workers to install and disassemble the pressure block, which is relatively simple to operate and convenient for workers to quickly maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the limiting mechanism of the present invention;

[0021] Figure 3 This is a schematic diagram of the appearance structure of the positioning plate of the present invention;

[0022] Figure 4 It is a schematic diagram of the structure of the casual clothing component of the present invention.

[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 fixed screw plug, 9 limit 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 casual assembly, 101 connecting groove, 102 connecting plate, 103 pressing block. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the 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.

[0025] See also Figure 1 In this embodiment, a lever mechanism of a rail transit brake caliper that is easy to maintain includes a lever body 1, an axial hole 2 is opened on 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 opened on the upper surface of the lever body 1, and a sleeve rod 5 with one end penetrating the lever body 1 and extending into the U-shaped groove 4 is provided at both left and right ends of the upper surface of the lever body 1, a fixing block 6 is fixed between the opposite sides of the two sleeve rods 5, a threaded hole 7 is opened in the middle of the front side of the fixing block 6, a fixing screw plug 8 is threadedly connected to the inner cavity of the threaded hole 7, and a limiting mechanism 9 for limiting the fixing screw plug 8 is provided on the upper and lower sides of the fixing block 6, and a convenient assembly 10 is provided on the front side of the fixing screw plug 8.

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

[0027] It should be noted that the maintenance of the EMU braking system includes the CR400AF simulation brake control device, which is mainly composed of the EBCU (electronic control unit), pressure switch functional module, air supply and air spring control functional module, brake control functional module and parking functional module. The brake control functional module of the braking system includes a closed plug, a pressure measuring joint, a pressure sensor, an air valve, an emergency switching solenoid valve, an emergency solenoid valve, an electronically controlled conversion valve and a relay valve. This module is mainly used for vehicle brake pressure control. It outputs different brake pressures through air spring pressure and brake level, and can also perform air spring pressure cut-off and brake pressure cut-off.

[0028] See also Figures 2 to 3In order to provide a limiting effect on the fixing screw plug 8, the limiting mechanism 9 in this embodiment includes a socket 901 opened on the upper and lower sides of the fixing block 6, and a positioning plate 902 is provided on the upper and lower sides of the fixing block 6. The positioning plate 902 is placed on the upper and lower sides of the socket 901, and the card plates on the opposite sides of the two positioning plates 902 are inserted through the socket 901. The left and right ends of the inner cavity of the positioning plate 902 are provided with a cavity 903, and a 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 slidably connected with a movable plate 905, and a telescopic rod 906 is fixed at the bottom between the opposite sides of the cavity 903 and the movable plate 905. The outer surface of the telescopic rod 906 is movably sleeved with a reset spring 907. A linkage plate 908 is fixed to the upper surface of the movable plate 905, and a positioning block 909 is fixed to the bottom between the opposite sides of the left and right linkage plates 908. Sink grooves 910 are provided on the left and right ends of the upper and lower sides of the fixed block 6, and a positioning groove 911 is provided on the opposite side of the left and right sink grooves 910. Pull plates 912 are fixed to the opposite sides of the left and right linkage plates 908. The movement of the two pull plates 912 drives the two linkage plates 908 to move away from each other. The away movement of the two linkage plates 908 causes the positioning block 909 to move and squeeze 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, which can increase the distance between the two linkage plates 908.

[0029] In this embodiment, an annular groove is provided on the outer side of the fixed screw plug 8, and a clamping plate is fixed on the opposite side of the upper and lower positioning plates 902. The width of the clamping plate is adapted to the width of the annular groove, and the size of the clamping plate is adapted to the size of the socket 901. A slider is fixed to the lower surface of the movable plate 905, and a sliding groove is provided on the inner bottom wall of the cavity 903. The slider makes horizontal linear motion 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 fitted with the fixed block 6, so that the bottom of the linkage plate 908 and the positioning block 909 can enter the inner cavity of the sink groove 910. At this time, the limit of the two pull plates 912 is released, and the reset spring 907 rebounds after being unrestricted and drives the telescopic rod 906 to extend, so that the two movable plates 905 make relative movement 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 card plate can be inserted into the annular groove on the fixed screw plug 8, and the upper and lower sides of the fixed screw plug 8 can be limited.

[0031] Among them, the two ends of the reset spring 907 are fixedly connected between the cavity 903 and the opposite side of the movable plate 905, and through holes are opened on the opposite sides of the left and right cavities 903. The cross-sectional shape of the linkage plate 908 is an inverted L shape. The size of the linkage plate 908 is adapted to the size of the inner cavity of the through hole, the size of the inner cavity of the sinking groove 910 is adapted to the size of the linkage plate 908, and the size of the positioning block 909 is adapted to the size of the inner cavity of the positioning groove 911.

[0032] It can be understood that by fixing the positioning plate 902 to the fixed block 6 through the positioning block 909 and the positioning groove 911, the position of the clamping plate can be fixed, thereby providing a stable limit for the fixed screw plug 8. When adjusting the fixed screw plug 8, the pull plates 912 on both sides are pulled and moved 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, thereby adjusting the fixed screw plug 8.

[0033] In addition, a finger insertion hole is provided on the left side of the pull plate 912 , and inserting a finger into the finger insertion hole provided on the left side of the pull plate 912 makes it convenient for the staff to move the two pull plates 912 .

[0034] It should be noted that, by providing a clamping plate on the lower surface of the positioning plate 902, when the clamping plate enters the annular groove, a limiting effect can be provided for the fixed screw plug 8. Therefore, when adjusting or limiting the fixed screw plug 8, it is only necessary to pull the pull plates 912 on both sides and move them to the side away from the fixed block 6, thereby greatly improving the efficiency of adjusting or limiting the fixed screw plug 8.

[0035] See also Figure 4 In order to facilitate the staff to remove and replace the pressure block 103, the casual wear component 10 in this embodiment includes a connecting groove 101 opened on the front side of the fixing screw plug 8, the inner cavity of the connecting groove 101 is threadedly connected to the connecting plate 102, and the pressure block 103 is fixed to the front side of the connecting plate 102.

[0036] In this embodiment, a finger receiving groove is opened on the front side of the pressing block 103, and there are two finger receiving grooves. Two fingers are respectively placed in the inner cavity of the finger receiving grooves, and then the connecting plate 102 is pinched to align with the connecting groove 101, 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. 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. The operation is relatively simple and convenient for the staff to quickly maintain it.

[0037] It can be understood that by passing one end of a rod from the lever mounting hole on the clamp housing support seat into the axial hole 2 on the lever body 1, the lever body 1 can be fixed to the clamp housing, so that the pressure block 103 in the fixed block 6 is opposite to the output shaft of the brake cylinder, and then the brake cylinder is started. The output shaft of the brake cylinder extends to squeeze the pressure block 103 in the fixed block 6. At this time, the lever body 1 is forced to rotate along the axial hole 2, thereby causing the lever body 1 to rotate.

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

[0039] (1) When in use, first screw the fixing screw plug 8 into the inner cavity of the threaded hole 7. In order to limit the fixing screw plug 8, the positioning plates 902 can be placed on the upper and lower sides of the insertion hole 901, and the card plates on the opposite sides of the two positioning plates 902 are inserted through the insertion hole 901. At this time, insert your fingers into the finger insertion hole opened on the left side of the pull plate 912, and then move the two pull plates 912 to the side away from the positioning plate 902. The movement of the two pull plates 912 drives the two linkage plates 908 to move back to back. The back-to-back movement of the two linkage plates 908 causes the positioning block 909 to move and squeeze 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, which can increase the distance between the two linkage plates 908. Then move the positioning plate 902 downward so that the lower surface of the positioning plate 902 fits with the fixing block 6, which can make the bottom of the linkage plate 908 The two movable plates 905 are relatively moved 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 card plate can be inserted into the annular groove on the fixed screw plug 8, and the upper and lower sides of the fixed screw plug 8 can be limited. The positioning plate 902 is fixed to the fixed block 6 by the positioning block 909 and the positioning groove 911, and the position of the card plate can be fixed, thereby providing a stable limit for the fixed screw plug 8. When adjusting the fixed screw plug 8, the pull plates 912 on both sides are pulled and moved, and the positioning plate 902 can be separated from the fixed block 6. The movement of the positioning plate 902 drives the card plate to move out of the annular groove, so that the fixed screw plug 8 can be adjusted.

[0040] (2) Place two fingers into the inner cavity of the finger receiving groove respectively, then pinch to align the connecting plate 102 with the connecting groove 101, and screw the connecting plate 102 into the inner cavity of the connecting groove 101 until the pressure block 103 completely enters the inner cavity of the connecting groove 101, so that the pressure block 103 can be fixed in the inner cavity of the connecting groove 101, and then pass one end of a rod from the lever mounting hole on the clamp housing support seat through the axial hole 2 on the lever body 1, so that the lever body 1 can be fixed to the clamp housing, so that the pressure block 103 in the fixed block 6 is opposite to the output shaft of the brake cylinder, and then start the brake cylinder. The output shaft of the brake cylinder extends to squeeze the pressure block 103 in the fixed block 6. At this time, the lever body 1 is forced to rotate along the axial hole 2, thereby causing the lever body 1 to rotate.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0042] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A lever mechanism for a rail transit brake caliper that is easy to maintain, comprising a lever body (1), characterized in that: An axial hole (2) is provided on 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 provided on the upper surface of the lever body (1), a sleeve rod (5) is provided at both left and right ends of the upper surface of the lever body (1), one end of which penetrates the lever body (1) and extends into the U-shaped groove (4), a fixing block (6) is fixed between the two opposite sides of the sleeve rods (5), a threaded hole (7) is provided in the middle of the front of the fixing block (6), a fixing screw plug (8) is threadedly connected in the inner cavity of the threaded hole (7), a limiting mechanism (9) for limiting the fixing screw plug (8) is provided on the upper and lower sides of the fixing block (6), and a convenient assembly (10) is provided on the front of the fixing screw plug (8); The limiting mechanism (9) comprises jacks (901) provided on the upper and lower sides of the fixing block (6); positioning plates (902) are provided on the upper and lower sides of the fixing block (6); cavities (903) are provided at both left and right ends of the inner cavity of the positioning plate (902); a connecting rod (904) is fixed between opposite sides of the left and right side walls of the inner cavity of the cavity (903); a movable plate (905) is slidably connected to the outer surface of the connecting rod (904); a telescopic rod (904) is fixed at the bottom between the opposite sides of the cavity (903) and the movable plate (905); 06), a return spring (907) is provided on the outer surface of the telescopic rod (906), a linkage plate (908) is fixed on the upper surface of the movable plate (905), and positioning blocks (909) are fixed at the bottom between the opposite sides of the linkage plates (908) at the left and right ends, and the left and right ends of the upper and lower sides of the fixed block (6) are provided with sink grooves (910), and the opposite sides of the sink grooves (910) at the left and right ends are provided with positioning grooves (911), and the opposite sides of the linkage plates (908) at the left and right ends are fixed with pull plates (912).

2. The lever mechanism of 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 larger than the size of the fixing block (6), and the fixing screw plug (8) is threadedly connected to the threaded hole (7).

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

4. The lever mechanism of the rail transit brake caliper that is easy to maintain according to claim 3 is characterized in that: The size of the card plate is matched with the size of the jack (901), a slider is fixed on the lower surface of the movable plate (905), a slide groove is provided on the inner bottom wall of the cavity (903), and the slider performs horizontal linear motion in the inner cavity of the slide groove.

5. The lever mechanism of the rail transit brake caliper that is easy to maintain according to claim 1 is characterized in that: The two ends of the return spring (907) are respectively fixedly connected between the cavity (903) and the opposite side of the movable plate (905), and through holes are provided on the opposite sides of the cavity (903) at the left and right ends.

6. The lever mechanism of the 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 an inverted L-shape, and the size of the linkage plate (908) is compatible with the size of the inner cavity of the through hole.

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

9. The lever mechanism of a rail transit brake caliper that is easy to maintain according to claim 1, characterized in that: The casual wear assembly (10) comprises a connection groove (101) provided on the front side of a fixing screw plug (8); a connection plate (102) is threadedly connected to the inner cavity of the connection groove (101); and a pressure block (103) is fixed to the front side of the connection plate (102).

10. The lever mechanism of the rail transit brake caliper that is easy to maintain according to claim 9, characterized in that: The front side of the pressing block (103) is provided with finger receiving grooves, and the number of the finger receiving grooves is two.

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