Manual electromagnetic parking brake valve

Abstract

The manual electromagnetic parking brake valve comprises a valve body, a valve element, an electromagnetic push rod, a first spring and a handle, the valve element is contained in a hollow cavity in the valve body and can slide in the axial direction of the hollow cavity, and the first spring is arranged in the hollow cavity in a sleeved mode and can enable the valve element to be kept at the initial position. The tail end of the electromagnetic push rod extends into the hollow cavity, when the electromagnetic push rod moves from one end to the other end of the stroke of the electromagnetic push rod, the first spring can be compressed to enable the valve element to move from the initial position to the tail end position of the electromagnetic push rod, the handle can be switched between a first position and a second position around a fulcrum, and when the handle is located at the first position, the second spring can be compressed to enable the valve element to move from the initial position to the tail end position. When the handle is located at the first position, the electromagnetic push rod can move within the stroke range of the electromagnetic push rod, and when the handle is located at the second position, the electromagnetic push rod is limited and enables the valve element to move to the tail end position. The device is reasonable in structure, safe, reliable and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of reversing valves, in particular to a manual electromagnetic parking brake valve. Background Art

[0002] With the continuous development of the mining industry, the frequency of use of underground explosion-proof vehicles has continued to increase, and transportation safety issues have also become an important concern of the industry. At present, most underground explosion-proof vehicles are controlled by drivers. Due to the terrain and environment in underground mining operations, drivers often need to drive and park on steep slopes to achieve forward, parking, starting and other actions. There are two options for the existing explosion-proof vehicle parking brake valve: 1) a parking valve operated by a mechanical handle; 2) an electromagnetic reversing valve as a parking brake valve; when driving in a mine area with limited height, the mechanical handle operation method has high technical requirements for the driver, is difficult to operate, and is prone to traffic accidents due to misoperation. The solution of using an electromagnetic reversing valve as a parking brake valve also has certain safety hazards. When the electromagnetic reversing valve loses power due to a fault, it will cause brake failure, causing casualties or property losses.

[0003] There are also brake valves in the prior art that combine mechanical and electromagnetic reversing valves, such as the patent document with application number 201911424658.4 and titled "A Four-Diameter Electromagnetic Manual Reversing Valve". Although it can overcome the defects of pure mechanical or electromagnetic brake valves, there are still problems such as the high flexibility of the mechanical handle and easy misoperation leading to accidents. Utility Model Content

[0004] The utility model discloses a manual electromagnetic parking brake valve, which solves the technical problems of easy misoperation of mechanical handles or poor reliability of electromagnetic brake valves in the prior art, and has the technical effects of reasonable structure, safety, reliability and convenient operation. The technical scheme adopted is as follows:

[0005] A manual electromagnetic parking brake valve comprises a valve body, a valve core, an electromagnetic push rod, a first spring and a handle, wherein the valve core is accommodated in a hollow cavity in the valve body and can slide axially along the hollow cavity, the first spring is sleeved in the hollow cavity and can keep the valve core in an initial position, the end of the electromagnetic push rod extends into the hollow cavity, when the electromagnetic push rod moves from one end of its stroke to the other end, the first spring can be compressed to move the valve core from the initial position to its end position, the handle can be switched between a first position and a second position around a fulcrum, when the handle is in the first position, the electromagnetic push rod can be displaced within its stroke range, and when the handle is in the second position, the electromagnetic push rod is limited and causes the valve core to move to its end position.

[0006] On the basis of the above technical solution, a toggle sleeve is axially slidably sleeved in the hollow cavity, the end of the electromagnetic push rod includes a transition rod, the transition rod is connected to the valve core through the toggle sleeve, and the transition rod is axially slidably connected to the toggle sleeve, the handle is movably connected to the toggle sleeve, and when the handle is switched from the first position to the second position, the toggle sleeve slides from the first end of its stroke to the second end of its stroke in the hollow cavity to limit the action of the electromagnetic push rod.

[0007] On the basis of the above technical solution, it also includes two second springs, which are respectively arranged on both sides of the toggle sleeve and are sleeved outside the transition rod. One of the second springs is respectively in contact with the electromagnetic push rod and the toggle sleeve, and the other second spring is respectively in contact with the toggle sleeve and the inner wall of the hollow cavity.

[0008] On the basis of the above technical solution, the transition rod is coaxially connected to the valve core through a limit screw, and the head of the limit screw is accommodated in a limit cavity in the driving sleeve. When the handle is in the first position and the electromagnetic push rod is displaced within its stroke range, the head of the limit screw can respectively abut against the two end surfaces of the limit cavity to limit the stroke range of the electromagnetic push rod.

[0009] On the basis of the above technical solution, the valve body includes a first body and a second body, and the first body and the second body are fixedly connected and can form a hollow cavity together.

[0010] On the basis of the above technical solution, a pin hole is provided on the toggle sleeve, and the handle includes a cross bar and a toggle pin. The two ends of the cross bar are respectively rotatably connected to the valve body, and the toggle pin is vertically fixed to the cross bar. The end of the toggle pin includes a ball head, and the ball head can be accommodated in the pin hole. When the handle switches between the first position and the second position around the cross bar, the toggle sleeve can be driven to slide axially in the hollow cavity.

[0011] On the basis of the above technical solution, the handle includes a handle rod, a locking rod, a lifting ring and an elastic pin. The locking rod is sleeved in the handle rod and is axially slidably connected to the handle rod. The lifting ring is sleeved outside the handle rod. One end of the elastic pin is fixedly connected to the lifting ring, and the other end of the elastic pin passes through a long hole axially extending on the handle rod and is fixedly connected to the locking rod. The end of the locking rod extends out of the handle rod, and a first concave cavity and a second concave cavity are respectively provided at corresponding positions on the valve body. When the locking rod extends into the first concave cavity, the handle is locked in the first position, and when the locking rod extends into the second concave cavity, the handle is locked in the second position.

[0012] On the basis of the above technical solution, a third spring is further included, the handle rod includes a slot hole, the locking rod is accommodated in the slot hole and is gap-matched with the slot hole, and the top end of the locking rod is connected to the slot hole through the third spring.

[0013] On the basis of the above technical solution, it also includes a handle ball head, the slot hole axially extends through the handle rod and forms a recessed groove on the handle ball head, and the handle ball head is threadedly connected to the handle rod.

[0014] On the basis of the above technical solution, the electromagnetic push rod includes an explosion-proof electromagnet.

[0015] Beneficial Effects

[0016] The utility model has a reasonable structure, and the handle is combined with the electromagnetic push rod to realize the integration of the handle and the electromagnetic reversing, wherein the handle operation can be locked in the first position and the second position respectively and switched between the first position and the second position, so that the operating handle can not only realize the switching between the driving state and the braking state, but also avoid the occurrence of safety accidents caused by misoperation, and at the same time, when the electromagnet in the electromagnetic push rod is not energized or stuck, it can also be manually operated, which is beneficial to improve safety and reliability.

[0017] In the utility model, the handle and the electromagnetic push rod can move separately. When the handle is in the first position, the electromagnetic push rod can be displaced within its travel range to switch between the driving state and the braking state. When the handle is switched between the first position and the second position, the driving state and the braking state can also be switched. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only one embodiment of the utility model. For ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0019] Figure 1 : A schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 2 : Schematic diagram of the working principle of the utility model;

[0021] Figure 3 : A schematic diagram of the structure of the top view of the utility model in the parking state;

[0022] Figure 4 : Figure 3 Schematic diagram of the cross-sectional structure along the BB direction;

[0023] Figure 5 : A structural diagram of the main view of the utility model in driving state;

[0024] Figure 6 : Figure 5 Schematic diagram of the cross-sectional structure along the AA direction;

[0025] Figure 7 : Figure 5 Schematic diagram of the cross-sectional structure along the middle DD direction;

[0026] Figure 8 : A structural diagram of the left view of the utility model in the parking state;

[0027] Fig. 9 : Figure 8 Schematic diagram of the cross-sectional structure in the CC direction; DETAILED DESCRIPTION

[0028] The following description and accompanying drawings fully illustrate the specific embodiments of this article so that those skilled in the art can practice them. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. The scope of the embodiments of this article includes the entire scope of the claims, as well as all available equivalents of the claims. Herein, the terms "first", "second", etc. are only used to distinguish one element from another, without requiring or implying any actual relationship or order between these elements. In fact, the first element can also be called the second element, and vice versa. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that the structure, device or equipment including a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also include elements inherent to such structure, device or equipment. In the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the structure, device or equipment including the elements. Each embodiment is described in a progressive manner herein, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the embodiments can be referred to each other.

[0029] The terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. in this document indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this document and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of this document, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, it can also be the internal communication of two elements, it can be a direct connection, or it can be an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0030] As used herein, the term "plurality" means two or more than two, unless otherwise specified.

[0031] In this document, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B.

[0032] In this article, the term "and / or" is a description of the association relationship between objects, indicating that three relationships may exist. For example, A and / or B means: A or B, or, A and B.

[0033] like Figures 1 to 9 A manual electromagnetic parking brake valve shown includes a valve body 1, a valve core 2, an electromagnetic push rod 3, a first spring 4 and a handle 5.

[0034] like Figure 1 As shown, the valve body 1 includes a first body 11 and a second body 12, which are fixedly connected and can form a hollow cavity 13 together, wherein the hollow cavity of the second body 12 is respectively connected with a P port, a T port and a B port, wherein the P port is connected with an accumulator, the T port is connected with an oil tank, and the B port is connected with a parking brake, wherein the accumulator and the parking brake are prior arts and will not be described in detail here.

[0035] The valve core 2 is accommodated in the hollow cavity 13 in the valve body 1 and can slide axially along the hollow cavity 13. The first spring 4 is sleeved in the hollow cavity 13. Figure 4 and 6 As shown, one end of the first spring 4 abuts against the flange on the valve core 2, and the other end of the first spring 4 abuts against the stepped end surface in the hollow cavity 13. Under the action of the first spring 4, the valve core 2 can be kept in the initial position, as shown in FIG. Figure 4 As shown;

[0036] The electromagnetic push rod 3 includes an explosion-proof electromagnet. When the explosion-proof electromagnet is energized, the electromagnetic push rod 3 can push the valve core 2 to slide. When the explosion-proof electromagnet is de-energized, the valve core 2 can be reset to its initial position under the action of the first spring 4. Figure 4 As shown, the electromagnetic push rod 3 is arranged close to the first body 11 , the end of the electromagnetic push rod 3 extends into the hollow cavity 13 , the end of the electromagnetic push rod 3 is coaxially fixed with a transition rod 7 , and the transition rod 7 is coaxially connected to the valve core 2 through a limit screw 8 .

[0037] like Figure 4 and 6As shown, a toggle sleeve 6 is axially slidably sleeved in the hollow cavity 13 corresponding to the first body 11, and the transition rod 7 passes through the toggle sleeve 6 and is clearance-matched with the toggle sleeve 6, so that the transition rod 7 can slide axially relative to the toggle sleeve 6, wherein the end of the toggle sleeve 6 close to the valve core 2 includes a limit cavity 61, the head of the limit screw 8 is accommodated in the limit cavity 61 in the toggle sleeve 6, and the transition rod 7 is fixedly connected to the head of the limit screw 8, and the head of the limit screw 8 includes an annular wing plate, and when the electromagnetic push rod 3 moves from one end of its stroke to the other end, the annular wing plate can respectively abut against the two end surfaces of the limit cavity 61.

[0038] It also includes two second springs 9, which are respectively arranged on both sides of the toggle sleeve 6 and sleeved outside the transition rod 7. One second spring 9 abuts against the electromagnetic push rod 3 and the toggle sleeve 6 respectively, and the other second spring 9 abuts against the toggle sleeve 6 and the inner wall of the hollow cavity 13 respectively.

[0039] The toggle sleeve 6 is provided with a pin hole, such as Figure 7 As shown, the handle 5 includes a cross bar 51 and a push pin 52. Both ends of the cross bar 51 are rotatably connected to the valve body 1 respectively, and a bearing is sleeved at the rotational connection. The push pin 52 is vertically fixed to the cross bar 51. The end of the push pin 52 includes a ball head, which can be accommodated in the pin hole. When the handle 5 switches between the first position and the second position around the cross bar 51, the push pin 52 drives the push sleeve 6 to slide axially in the hollow cavity 13.

[0040] When the handle 5 is in the first position, the second spring 9 away from the valve core 2 is compressed, and the vehicle is in the parking state. Figure 3 and 4 As shown, the hydraulic oil P port is blocked, and the B port is connected to the T port, so that the spring of the parking brake takes effect and the vehicle is in the parking state. At this time, the valve core 2 is in the initial position under the action of the first spring. In addition, when the handle 5 is in the first position, under the action of the push pin 52, the push sleeve 6 is set away from the valve core 2. Even when the explosion-proof electromagnet is energized, the electromagnetic push rod 3 cannot overcome the pressure of the second spring 9 to do work, that is, the electromagnetic push rod 3 is limited. On the one hand, it avoids safety accidents caused by the fault displacement of the electromagnetic push rod 3 when the handle is operated; on the other hand, the handle 5 is locked in the first position to avoid safety accidents caused by misoperation.

[0041] When the handle 5 is in the second position, the driving sleeve 6 slides from the first end of its stroke to the second end of its stroke in the hollow cavity 13 to limit the action of the electromagnetic push rod 3. At this time, the second spring 9 close to the valve core 2 is compressed. Figure 5 and 6As shown, it is the driving state, at this time, the hydraulic oil port P is connected with the B port, and the T port is blocked, so that the spring of the parking brake fails, and the vehicle is in the driving state. At this time, under the action of the detent pin 52, the toggle sleeve 6 is set close to the valve core 2, that is, the toggle sleeve 6 does not limit the action of the electromagnetic push rod 3, and the electromagnetic push rod 3 can be axially displaced within its stroke range. Specifically, at this time, if the explosion-proof electromagnet is energized, the electromagnetic push rod 3 is pushed out, and the electromagnetic push rod is displaced from one end of its stroke to the other end, and the valve core 2 is pushed from the initial position to the right to its end position through the transition rod 7 and the limit screw 8, the first spring 4 is compressed, the hydraulic oil P port is blocked, and the B port is connected with the T port, so that the vehicle is switched from the driving state to the parking state; if the explosion-proof electromagnet loses power, the electromagnetic push rod 2 is passively actuated, and under the action of the first spring 4, the valve core 2 is reset from the end position to the initial position, so that the vehicle is switched from the driving state to the parking state.

[0042] Among them, the limit cavity 61 is designed so that the axial length of the limit cavity 61 is adapted to the stroke range of the electromagnetic push rod 3, that is, when the electromagnetic push rod 3 is displaced within its stroke range, the head of the limit screw 8 can respectively abut against the two end surfaces of the limit cavity 61 to limit the stroke range of the electromagnetic push rod 3, so as to make the operation of the brake valve safer and more reliable and improve the precise limit of the stroke range of the electromagnetic push rod 3.

[0043] like Figure 8 and 9 As shown, the handle 5 includes a handle rod 53, a locking rod 54, a lifting ring 55, a third spring 57, a handle ball head 58 and an elastic pin 56. The locking rod 54 is sleeved in the handle rod 53 and is axially slidably connected to the handle rod 53. Specifically, the handle rod 53 includes a slot, and the handle ball head 58 is screwed to the top of the handle rod 53. The slot axially extends through the handle rod 53 and forms a recessed groove on the handle ball head 58. The locking rod 54 is accommodated in the slot and is in clearance with the slot. The third spring 57 is embedded in the recessed groove and fixedly connected to the recessed groove. The other end of the third spring 57 is fixedly connected or abutted with the locking rod 54.

[0044] The lifting ring 55 is sleeved outside the handle rod 53, one end of the elastic pin 56 is fixedly connected to the lifting ring 55, the other end of the elastic pin 56 passes through the long hole extending axially on the handle rod 53 and is fixedly connected to the locking rod 54, the end of the locking rod 54 extends out of the handle rod 53, and the first concave cavity 100 and the second concave cavity 200 are respectively provided at corresponding positions on the valve body 1. Fig. 9 As shown, the axes of the first cavity 100 and the second cavity 100 extend radially from the center point of the cross bar 51. When the locking rod 54 is extended into the first cavity 100, the handle 5 is locked in the first position. When the lifting ring 55 is operated to make the locking rod 54 extend into the second cavity 200, the handle 5 is locked in the second position.

[0045] The present invention is described above by way of examples, but the present invention is not limited to the above specific embodiments, and any changes or modifications based on the present invention belong to the scope of protection required by the present invention.

Claims

1. A manual electromagnetic parking brake valve, comprising a valve body (1), a valve core (2), an electromagnetic push rod (3), a first spring (4) and a handle (5), wherein the valve core (2) is accommodated in a hollow cavity (13) in the valve body (1) and can slide axially along the hollow cavity (13), the first spring (4) is sleeved in the hollow cavity (13) and can keep the valve core (2) in an initial position, the end of the electromagnetic push rod (3) extends into the hollow cavity (13), and when the electromagnetic push rod (3) moves from one end of its stroke to the other end, the first spring (4) can be compressed to move the valve core (2) from the initial position to its end position, characterized in that: The handle (5) can be switched around a fulcrum between a first position and a second position; when the handle (5) is in the first position, the electromagnetic push rod (3) can be displaced within its travel range; when the handle (5) is in the second position, the electromagnetic push rod (3) is limited and causes the valve core (2) to be displaced to its end position.

2. The manual electromagnetic parking brake valve according to claim 1, characterized in that: A toggle sleeve (6) is axially slidably sleeved in the hollow cavity (13); the end of the electromagnetic push rod (3) includes a transition rod (7); the transition rod (7) is connected to the valve core (2) through the toggle sleeve (6); and the transition rod (7) is axially slidably connected to the toggle sleeve (6); the handle (5) is movably connected to the toggle sleeve (6); and when the handle (5) is switched from a first position to a second position, the toggle sleeve (6) slides from a first end of its stroke to a second end of its stroke in the hollow cavity (13) to limit the movement of the electromagnetic push rod (3).

3. The manual electromagnetic parking brake valve according to claim 2, characterized in that: It also includes two second springs (9), which are arranged on both sides of the toggle sleeve (6) and sleeved outside the transition rod (7), one of the second springs (9) respectively abuts against the electromagnetic push rod (3) and the toggle sleeve (6), and the other second spring (9) respectively abuts against the toggle sleeve (6) and the inner wall of the hollow cavity (13).

4. The manual electromagnetic parking brake valve according to claim 2, characterized in that: The transition rod (7) is coaxially connected to the valve core (2) via a limit screw (8); the head of the limit screw (8) is accommodated in a limit cavity (61) in the shift sleeve (6); when the handle (5) is in the first position and the electromagnetic push rod (3) is displaced within its stroke range, the head of the limit screw (8) can respectively abut against the two end surfaces of the limit cavity (61) to limit the stroke range of the electromagnetic push rod (3).

5. The manual electromagnetic parking brake valve according to claim 4, characterized in that: The valve body (1) comprises a first body (11) and a second body (12); the first body (11) and the second body (12) are fixedly connected and can jointly form a hollow cavity (13).

6. The manual electromagnetic parking brake valve according to any one of claims 2 to 5, characterized in that: The toggle sleeve (6) is provided with a pin hole. The handle (5) comprises a cross bar (51) and a toggle pin (52). The two ends of the cross bar (51) are respectively rotatably connected to the valve body (1). The toggle pin (52) is vertically fixed to the cross bar (51). The end of the toggle pin (52) comprises a ball head. The ball head can be accommodated in the pin hole. When the handle (5) switches between the first position and the second position around the cross bar (51), the toggle sleeve (6) can be driven to slide axially in the hollow cavity (13).

7. The manual electromagnetic parking brake valve according to claim 6, characterized in that: The handle (5) comprises a handle rod (53), a locking rod (54), a lifting ring (55) and an elastic pin (56); the locking rod (54) is sleeved inside the handle rod (53) and is axially slidably connected to the handle rod (53); the lifting ring (55) is sleeved outside the handle rod (53); one end of the elastic pin (56) is fixedly connected to the lifting ring (55); the other end of the elastic pin (56) passes through an axially extending long hole on the handle rod (53) and is fixedly connected to the locking rod (54); a distal end of the locking rod (54) extends outside the handle rod (53); a first concave cavity (100) and a second concave cavity (200) are respectively provided at corresponding positions on the valve body (1); when the locking rod (54) extends into the first concave cavity (100), the handle (5) is locked in the first position; when the locking rod (54) extends into the second concave cavity (200), the handle (5) is locked in the second position.

8. The manual electromagnetic parking brake valve according to claim 7, characterized in that: It also includes a third spring (57), the handle rod (53) includes a slotted hole, the locking rod (54) is accommodated in the slotted hole and is clearance-matched with the slotted hole, and the top end of the locking rod (54) is connected to the slotted hole via the third spring (57).

9. The manual electromagnetic parking brake valve according to claim 8, characterized in that: It also comprises a handle ball head (58), the slot hole axially extending through the handle rod (53) and forming a recessed groove on the handle ball head (58), and the handle ball head (58) is threadedly connected to the handle rod (53).

10. The manual electromagnetic parking brake valve according to any one of claims 7 to 9, characterized in that: The electromagnetic push rod (3) comprises an explosion-proof electromagnet.

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