Shutdown safety locking device for walking-beam-free vertical machine and using method

Abstract

The invention discloses a walking-beam-free vertical machine shutdown safety locking device and a using method, the walking-beam-free vertical machine shutdown safety locking device comprises a brake disc and a fixed base plate, a shaft hole is formed in the center of the brake disc, and the brake disc comprises a locking brake disc and a friction brake disc; a locking brake handle and a friction brake pad are arranged on the fixed base plate, and the friction brake pad can clamp the friction brake disc to generate friction force; the locking brake handle is provided with a locking safety device, the locking brake disc is provided with first special-shaped teeth, the locking brake handle is provided with second special-shaped teeth, and the first special-shaped teeth can be meshed with the second special-shaped teeth. The brake is mechanically locked, self-locking is achieved through the special-shaped teeth, slipping is avoided, and intrinsic safety of the brake is ensured.

Description

Technical Field

[0001] This invention relates to the field of oil pumping unit technology, specifically to a safety locking device and method for stopping a beamless vertical pumping unit. Background Technology

[0002] Currently, the main surface oil production equipment in oilfields is the pumping unit, and among vertical pumping units, the beamless pumping unit is the primary extraction equipment. The pumping unit's braking is achieved through a brake disc mounted on the input shaft of the reducer, which, through friction braking of the brake pads, brings the input shaft to a complete stop. With increasing service life, the friction coefficient of the friction surfaces decreases, and the braking force cannot be fully guaranteed after repeated braking. After shutdown, operators perform work, maintenance, and other operations on the pumping unit, relying solely on the conventional braking device. During pumping operations, when changes in well load occur, or during pumping unit maintenance, guide wheel repair, or cleaning of lubricating oil inside the casing, the friction brake is susceptible to slippage due to external vibrations, causing unexpected movement of the pumping unit and posing significant safety hazards to the equipment and operators.

[0003] Publication (Announcement) No.: CN113107994A, discloses a method and device for improving the braking safety of a beam pumping unit. The device comprises a brake disc, locking teeth, locking tooth shaft, shift fork, conversion head, handle seat, and other parts. Braking is achieved through gear-type brake disc and locking teeth meshing, and after braking, the position of the locking teeth is fixed and cannot be moved, thus locking the brake disc.

[0004] Publication (Announcement) No.: CN208935228U discloses a self-locking protection device for a belt-driven oil pumping unit brake. After the oil pumping unit stops, pulling the brake handle causes the ratchet teeth to rotate clockwise, pushing the locking teeth block backward. After the brake system is fully engaged, the locking teeth block is reset under the action of the return spring, cooperating with the ratchet to lock the brake and prevent the brake from slipping.

[0005] Publication (Announcement) No.: CN214945913U discloses a double-meshing toothed disc brake safety device for an oil pumping unit. The brake plate is located on the upper part of the outer toothed disc and is connected to the gearbox together with the brake hoop through an extended brake shaft. An inner toothed disc is provided inside the outer toothed disc. Through double meshing of the inner and outer teeth, the brake can be reliably locked and easily released at any position of the oil pumping unit, whether under load or not.

[0006] The aforementioned prior art uses ordinary tooth profiles without a self-locking function. It cannot work when the mechanical structure used to lock the handle fails, and the handle's rotating shaft has no safety measures. If the brake is activated during the operation of the pumping unit, it will cause danger.

[0007] In summary, the technical solutions, technical problems to be solved, and beneficial effects of the above-disclosed technologies are all different from those of the present invention. Regarding the more technical features, technical problems to be solved, and beneficial effects of the present invention, the above-disclosed technical documents do not provide any technical inspiration. Summary of the Invention

[0008] In view of the above-mentioned defects in the existing technology, the purpose of this invention is to provide a safety locking device for stopping a beamless vertical machine and its usage method.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] On one hand, the present invention provides a safety locking device for stopping a beamless vertical machine, including a brake disc and a fixed base plate. The brake disc has a shaft hole in the center and includes a locking brake disc and a friction brake disc. The fixed base plate is provided with a locking brake lever and a friction brake pad. The friction brake pad can apply friction to the friction brake disc to generate friction. The locking brake lever is provided with a locking safety. The locking brake disc is provided with a first shaped tooth and the locking brake lever is provided with a second shaped tooth. The first shaped tooth and the second shaped tooth can mesh.

[0011] Furthermore, the first irregular tooth includes a left side face and a right side face;

[0012] Specifically, the left side includes a left tooth tip edge, a left tooth middle edge, and a left tooth bottom edge that are connected as one piece; the right side includes a right tooth tip edge, a right tooth middle edge, and a right tooth bottom edge that are connected as one piece.

[0013] Specifically, the left tooth tip and the right tooth tip intersect at the top to form an acute angle at the tooth tip, and the left and right sides of the first irregular tooth are symmetrical about the line connecting the tooth tip and the center of the locking brake disc.

[0014] Specifically, the middle edge of the left tooth and the middle edge of the right tooth are both inclined inward and their extension lines intersect at the center of the compression brake disc;

[0015] Specifically, the left tooth tip edge and the left tooth bottom edge form obtuse angles with the left tooth middle edge, and the right tooth tip edge and the right tooth bottom edge form obtuse angles with the right tooth middle edge; the left tooth tip edge is parallel to the left tooth bottom edge, and the right tooth tip edge is parallel to the right tooth bottom edge.

[0016] Specifically, the second non-standard tooth profile is consistent with the first non-standard tooth profile.

[0017] Furthermore, the locking brake has a long strip-shaped longitudinal section; the locking brake includes a handle, a second shaped tooth, and a pivot hole;

[0018] Specifically, the locking safety is a self-locking rotary plunger;

[0019] Specifically, the handle and the pivot hole are respectively distributed at the lower end and the upper end of the locking brake lever, the second shaped tooth is provided on the side of the locking brake lever, and at least one of the second shaped teeth is provided;

[0020] Specifically, the locking brake lever has a plunger mounting hole at one end of the rotating shaft hole, which extends from the outer surface to the rotating shaft hole. The self-locking rotating plunger is concentric with the plunger mounting hole and is fixedly connected to the plunger mounting hole.

[0021] Furthermore, a hanging shaft fixing plate is provided on the fixed base plate, and a brake lever hanging shaft is provided on the hanging shaft fixing plate. The locking brake lever is installed on the brake lever hanging shaft through a pivot hole, and the locking brake lever can rotate around the brake lever hanging shaft.

[0022] Specifically, the brake lever pin is provided with a radial countersunk hole, which is used to engage with a self-locking rotary plunger to lock and tighten the brake lever;

[0023] Specifically, an axial countersunk hole is provided on the end face of the brake lever shaft, an axial fixing bolt is provided in the axial countersunk hole, and a fixing baffle is provided under the bolt head of the axial fixing bolt to restrict the radial movement of the locking brake lever.

[0024] Furthermore, the self-locking rotary plunger includes an operating knob, a mounting base, a locking pin, and a compression spring; the mounting base is fixedly connected to the plunger mounting hole.

[0025] Specifically, the lower end of the mounting base is provided with a spring countersunk hole, the upper end of the spring countersunk hole is provided with a stud through hole, and the compression spring is disposed in the spring countersunk hole;

[0026] Specifically, the upper end of the locking pin is provided with a stud, the locking pin is set in the spring countersunk hole, and the stud passes through the compression spring and the stud through hole, and the lower end of the operating knob is connected to the stud;

[0027] Specifically, the lower end of the operating knob is provided with a convex structure, and the upper end of the mounting base is provided with a concave structure, wherein the convex structure can be inserted into the concave structure.

[0028] Furthermore, the locking brake disc has a circular ring structure, the first irregular teeth are evenly distributed along the outer circumference of the locking brake disc, and at least two circular holes are provided in the middle of the locking brake disc;

[0029] Specifically, the circular holes on the locking brake disc are distributed in the same way as the circular holes on the friction brake disc, and the locking brake disc and the friction brake disc are fixed together by a locking brake disc fixing pad, a locking brake disc fixing bolt, and a locking brake disc fixing nut.

[0030] Specifically, the friction brake disc is connected to the input shaft of the gearbox via a keyway and an axial locking bolt, and the friction brake disc, locking brake disc, and gearbox input shaft are coaxial.

[0031] Furthermore, both the left and right tooth mid-sides are inclined inward by five degrees.

[0032] Secondly, the present invention provides a beamless vertical machine, including a gearbox, wherein the input shaft of the gearbox is provided with the above-mentioned safety locking device for stopping the beamless vertical machine.

[0033] In three aspects, the present invention provides a method for using a safety locking device for stopping a beamless vertical crane, comprising the following steps:

[0034] S1. The above-mentioned safety locking device for stopping a beamless vertical machine is installed on the input shaft of the gearbox of the beamless vertical machine;

[0035] S2. During locking, the friction brake pads are pressed together to rub against the friction brake disc, so that the input shaft of the gearbox, which is coaxial with the friction brake disc, stops rotating.

[0036] First, release the safety, then rotate the brake lever downwards around the brake lever shaft. The second shaped tooth on the brake lever engages with the first shaped tooth on the brake disc to complete the locking and parking maneuver.

[0037] S3. When unlocking, rotate the locking brake lever upward around the brake lever shaft. The second eccentric tooth on the locking brake lever will disengage from the first eccentric tooth on the locking brake disc. Then release the friction brake pads. At this time, the gearbox input shaft can rotate freely. Then engage the safety mechanism.

[0038] Furthermore, when releasing the safety, lift the operating knob to separate the convex and concave structures, and then rotate the operating knob to complete the opening operation. At this time, the locking pin compresses the compression spring.

[0039] Furthermore, when locking, the operating knob is rotated, and the locking pin moves downward and inserts into the radial countersunk hole by the elastic force of the compression spring. At the same time, the convex structure penetrates into the concave structure to complete the locking.

[0040] Compared with the prior art, the present invention has the following advantages:

[0041] 1. The structure and layout are reasonable, which effectively reduces production costs and improves economic efficiency.

[0042] 2. The operation process is simplified, saving time and effort.

[0043] 3. The brakes are mechanically locked, using special-shaped teeth to achieve self-locking, preventing slippage and ensuring the inherent safety of the brakes.

[0044] 4. It is conducive to promotion and application. Attached Figure Description

[0045] Figure 1 This is a structural schematic diagram of a beamless vertical machine stop safety locking device according to the present invention;

[0046] Figure 2 This is a schematic diagram of the brake disc structure in this invention;

[0047] Figure 3 This is a schematic diagram of the brake arm in this invention;

[0048] Figure 4 This is a schematic diagram of the brake axle system in this invention;

[0049] Figure 5 This is a schematic diagram of the structure of the present invention mounted on the gearbox;

[0050] Figure 6 This is a schematic diagram of the assembly of the brake hanger and the locking brake lever in this invention;

[0051] Figure 7 This is a state diagram of the self-locking rotary plunger in this invention.

[0052] In the diagram: 1. Locking brake disc; 1.1. First irregular tooth; 2. Locking brake lever; 2.1. Second irregular tooth; 2.2. Plunger mounting hole; 3. Brake lever hanger shaft; 3.1. Radial countersunk hole; 3.2. Axial countersunk hole; 4. Hanger shaft fixing plate; 5. Friction brake disc; 6. Locking brake disc fixing pad; 7. Locking brake disc fixing bolt; 8. Fixing base plate; 9. Friction brake pad; 10. Fixing baffle; 11. Axial fixing bolt; 12. Shaft hole; 13. Hanger shaft fixing plate mounting bolt; 14. Gearbox; 15. Self-locking rotary plunger; 15.1. Operating knob; 15.2. Mounting seat; 15.3. Locking pin; 15.4. Convex structure; 15.5. Concave structure; 15.6. Compression spring. Detailed Implementation

[0053] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0054] Example 1:

[0055] Please see Figures 1 to 7The present invention provides a safety locking device for stopping a beamless vertical machine, comprising a brake disc and a fixed base plate 8. The brake disc has a shaft hole 12 at its center for connection to the input shaft of a gearbox 14. The brake disc includes a locking brake disc 1 and a friction brake disc 5. The fixed base plate 8 is provided with a locking brake handle 2 and a friction brake pad 9. The locking brake handle 2 can fix the locking brake disc 1, and the friction brake pad 9 can apply friction to the friction brake disc 5. The locking brake handle 2 is provided with a locking safety to prevent the locking brake handle 2 from accidentally locking the locking brake disc 1 when the gearbox 14 is working, thus avoiding an accident.

[0056] Specifically, the locking brake disc 1 is an annular structure with a certain thickness, a first irregular tooth 1.1 on the outer periphery, and two or more circular holes in the middle. The first irregular tooth 1.1 is evenly distributed along the outer periphery of the locking brake disc 1.

[0057] Specifically, the fixed base plate 8 is a flat plate that can be fixed on the housing of the gearbox 14. The circular holes on the locking brake disc 1 are distributed in the same way as the circular holes on the friction brake disc 5 fixed on the input shaft of the gearbox 14 in the beamless vertical machine. The locking brake disc 1 and the friction brake disc 5 are fixed together by the locking brake disc fixing pad 6, the locking brake disc fixing bolt 7, and the locking brake disc fixing nut. The friction brake disc 5 is connected to the input shaft of the gearbox 14 by the keyway and the axial locking bolt. The friction brake disc 5, the locking brake disc 1, and the input shaft of the gearbox 14 are coaxial.

[0058] Preferably, the first irregular tooth 1.1 includes a left side and a right side. The left side includes a left tooth tip edge, a left tooth middle edge, and a left tooth bottom edge that are integrally connected vertically. The right side includes a right tooth tip edge, a right tooth middle edge, and a right tooth bottom edge that are integrally connected vertically. The left tooth tip edge and the right tooth tip edge intersect at the top to form an acute angle. The left side and the right side of the first irregular tooth 1.1 are symmetrical about the line connecting the tooth tip and the center of the locking brake disc 1. The left tooth middle edge and the right tooth middle edge are both inclined inward, and their extension lines intersect at the center of the locking brake disc 1. The center of the brake disc is tightened; the left tooth tip and the left tooth bottom edge form obtuse angles with the left tooth middle edge, the right tooth tip and the right tooth bottom edge form obtuse angles with the right tooth middle edge, the left tooth tip edge is parallel to the left tooth bottom edge, and the right tooth tip edge is parallel to the right tooth bottom edge; this tooth shape makes the tooth tip shape formed by the left tooth tip edge, the left tooth middle edge, the right tooth tip edge, and the right tooth middle edge consistent with the tooth groove shape formed by the left tooth bottom edge, the left tooth middle edge, the right tooth bottom edge, and the right tooth middle edge, achieving a tight connection between the tooth tip and the tooth groove, forming a self-locking mechanism that is not easy to disengage.

[0059] Specifically, the locking brake lever 2 has a certain thickness and a long strip-shaped structure in longitudinal section, including a handle, a second shaped tooth 2.1, and a pivot hole. The locking safety is a self-locking rotary plunger 15. The handle and the pivot hole are respectively distributed at the lower end and the upper end of the locking brake lever 2. The second shaped tooth 2.1 is provided on the side of the locking brake lever 2. At least two second shaped teeth 2.1 are provided. The tooth shape of the second shaped tooth 2.1 is consistent with the tooth shape of the first shaped tooth 1.1.

[0060] Specifically, a hanging shaft fixing plate 4 is provided on the fixed base plate 8, and a brake lever hanging shaft 3 is provided on the hanging shaft fixing plate 4. The locking brake lever 2 is installed on the brake lever hanging shaft 3 through a rotating shaft hole. The locking brake lever 2 can rotate around the brake lever hanging shaft 3, and the second profile tooth 2.1 of the locking brake lever 2 can mesh with the first profile tooth 1.1 of the locking brake disc 1.

[0061] Specifically, the locking brake lever has a plunger mounting hole 2.2 at one end of the shaft hole, which extends from the outer surface to the shaft hole. The self-locking rotary plunger 15 is concentric with the plunger mounting hole 2.2 and is mounted on the plunger mounting hole 2.2 by welding.

[0062] Preferably, the hanging shaft fixing plate 4 is a rectangular metal plate with a certain thickness, a fixing round hole at each of the four corners, and a brake lever hanging shaft 3 in the middle. The hanging shaft fixing plate 4 is fixed to the fixing base plate 8 through the fixing round hole and the hanging shaft fixing plate mounting bolt 13. The brake lever hanging shaft 3 is cylindrical and is connected to the hanging shaft fixing plate 4 by welding.

[0063] Specifically, the brake lever shaft 3 is provided with a radial countersunk hole 3.1, which is used to lock the brake lever 2 in conjunction with the self-locking rotary plunger 15; the brake lever shaft 3 is provided with an axial countersunk hole 3.2 on its end face, and an axial fixing bolt 11 is provided in the axial countersunk hole 3.2. A fixing baffle 10 is provided under the bolt head of the axial fixing bolt 11. The axial fixing bolt 11 and the fixing baffle 10 serve to restrict the radial movement of the locked brake lever 2.

[0064] Specifically, the self-locking rotary plunger 15 includes an operating knob 15.1, a mounting base 15.2, a locking pin 15.3, and a compression spring 15.6. The mounting base 15.2 is welded to the plunger mounting hole 2.2. The lower end of the mounting base 15.2 has a spring countersunk hole, and the upper end of the spring countersunk hole has a stud through hole. The compression spring 15.6 is disposed in the spring countersunk hole. The upper end of the locking pin 15.3 is provided with a stud, and the locking pin 15.3 is disposed in the spring countersunk hole, allowing the stud to pass through the compression spring 15.6 and the stud through hole. The lower end of the operating knob 15.1 is connected to the stud, and the lower end of the operating knob 15.1 is provided with a convex structure 15.4. The upper end of the mounting base 15.2 is provided with a concave structure 15.5. The convex structure 15.4 can be inserted into the concave structure 15.5, preventing the operating knob 15.1 from rotating around the mounting base 15.2.

[0065] When the self-locking rotary plunger 15 is opened, lift the operating knob 15.1 to separate the convex structure 15.4 from the concave structure 15.5. Then rotate the operating knob 15.1 90° to complete the opening operation. At this time, the locking pin 15.3 compresses the compression spring 15.6. When locking, rotate the operating knob 15.1 90° again. Relying on the elastic force of the compression spring 15.6, the locking pin 15.3 moves downward, and at the same time, the convex structure 15.4 penetrates into the concave structure 15.5 to complete the locking.

[0066] Example 2:

[0067] This embodiment provides a method for using a safety locking device for stopping a beamless vertical crane, specifically including the following steps:

[0068] S1. A safety locking device for stopping a beamless vertical machine is installed on the input shaft of the gearbox of the beamless vertical machine;

[0069] S2. During locking, the friction brake pad 9 is pressed down to rub against the friction brake disc 5, so that the gearbox input shaft 12, which is coaxial with the friction brake disc 5, stops rotating.

[0070] First, release the safety, lift the operating knob 15.1 to separate the convex structure 15.4 from the concave structure 15.5, and then rotate the operating knob 15.1 90° to complete the opening operation. At this time, the locking pin 15.3 will compress the compression spring 15.6.

[0071] Then, the brake lever 2 is rotated downwards around the brake lever shaft 3, and the second shaped tooth 2.1 on the brake lever 2 meshes with the first shaped tooth 1.1 on the brake disc 1, thus completing the locking and parking process.

[0072] S3. When unlocking, rotate the locking brake lever 2 upward around the brake lever shaft 3. The second shaped tooth 2.1 on the locking brake lever 2 disengages from the first shaped tooth 1.1 on the locking brake disc 1. Then release the friction brake pad 9. At this time, the gearbox input shaft can rotate freely.

[0073] Then, the safety mechanism is engaged, causing the operating knob 15.1 to rotate 90°. Relying on the elastic force of the compression spring 15.6, the locking pin 15.3 moves downward and inserts into the radial countersunk hole 3.1. At the same time, the convex structure 15.4 extends into the concave structure 15.5, completing the locking.

[0074] Example 3:

[0075] Based on the technical solution described in Embodiment 1, the second irregular tooth 2.1 on the locking brake lever 2 is a single tooth, which is convenient for manufacturing;

[0076] Both the left and right tooth sides are designed with an inward inclination of five degrees. Tests have shown that this design angle has both a good self-locking effect and facilitates operation when opening, making it a suitable angle.

[0077] All components not discussed in detail in this application, as well as the connection methods of these components, are well-known technologies in this field. They can be directly applied and will not be elaborated further.

[0078] In this invention, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0079] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0080] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0081] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A safety locking device for stopping a beamless vertical machine, comprising a brake disc and a fixed base plate, wherein the brake disc has a shaft hole at its center, characterized in that, The brake disc includes a locking brake disc and a friction brake disc; The fixed base plate is provided with a locking brake lever and a friction brake pad, and the friction brake pad can support the friction brake disc to generate friction force. The locking brake lever is equipped with a locking safety, the locking brake disc is equipped with a first shaped tooth, and the locking brake lever is equipped with a second shaped tooth, wherein the first shaped tooth and the second shaped tooth can mesh.

2. The beamless vertical crane stop safety locking device according to claim 1, characterized in that, The first irregular tooth includes a left side face and a right side face; The left side includes a left tooth top edge, a left tooth middle edge, and a left tooth bottom edge that are connected as one piece; the right side includes a right tooth top edge, a right tooth middle edge, and a right tooth bottom edge that are connected as one piece. The left tooth tip and the right tooth tip intersect at the top to form an acute angle. The left and right sides of the first irregular tooth are symmetrical about the line connecting the tooth tip and the center of the locking brake disc. The middle edge of the left tooth and the middle edge of the right tooth are both inclined inward and their extension lines intersect at the center of the compression brake disc; The left tooth tip and the left tooth bottom edge form obtuse angles with the left tooth middle edge, and the right tooth tip and the right tooth bottom edge form obtuse angles with the right tooth middle edge; the left tooth tip edge is parallel to the left tooth bottom edge, and the right tooth tip edge is parallel to the right tooth bottom edge. The second non-standard tooth profile is consistent with the first non-standard tooth profile.

3. The beamless vertical crane stop safety locking device according to claim 2, characterized in that, The locking brake has a long strip-shaped longitudinal section; the locking brake includes a handle, a second special-shaped tooth, and a rotating shaft hole; The locking safety is a self-locking rotary plunger; The handle and the pivot hole are respectively distributed at the lower end and the upper end of the locking brake lever, and the second shaped tooth is provided on the side of the locking brake lever, and at least one of the second shaped teeth is provided; The locking brake lever has a plunger mounting hole at one end of the rotating shaft hole, which extends from the outer surface to the rotating shaft hole. The self-locking rotating plunger is concentric with the plunger mounting hole and is fixedly connected to the plunger mounting hole.

4. The beamless vertical crane stop safety locking device according to claim 3, characterized in that, A hanging shaft fixing plate is provided on the fixed base plate, and a brake lever hanging shaft is provided on the hanging shaft fixing plate. The locking brake lever is installed on the brake lever hanging shaft through a pivot hole, and the locking brake lever can rotate around the brake lever hanging shaft. The brake lever pin is provided with a radial countersunk hole, which is used to engage with a self-locking rotary plunger to lock and tighten the brake lever. An axial countersunk hole is provided on the end face of the brake lever shaft, and an axial fixing bolt is provided in the axial countersunk hole. A fixing baffle is provided under the bolt head of the axial fixing bolt to restrict the radial movement of the brake lever.

5. The beamless vertical crane stop safety locking device according to claim 4, characterized in that, The self-locking rotary plunger includes an operating knob, a mounting base, a locking pin, and a compression spring; the mounting base is fixedly connected to the plunger mounting hole. The mounting base has a spring countersunk hole at its lower end, and a stud through hole at its upper end. The compression spring is disposed in the spring countersunk hole. The upper end of the locking pin is provided with a stud, the locking pin is set in the spring countersunk hole, and the stud passes through the compression spring and the stud through hole. The lower end of the operating knob is connected to the stud. The lower end of the operating knob is provided with a convex structure, and the upper end of the mounting base is provided with a concave structure. The convex structure can be inserted into the concave structure.

6. The beamless vertical crane stop safety locking device according to claim 1, characterized in that, The locking brake disc has a circular structure, the first irregular teeth are evenly distributed along the outer circumference of the locking brake disc, and at least two circular holes are provided in the middle of the locking brake disc; The circular holes on the locking brake disc are distributed in the same way as the circular holes on the friction brake disc. The locking brake disc and the friction brake disc are fixed together by the locking brake disc fixing pad, the locking brake disc fixing bolt, and the locking brake disc fixing nut. The friction brake disc is connected to the input shaft of the gearbox via a keyway and axial locking bolts, and the friction brake disc, locking brake disc, and gearbox input shaft are coaxial.

7. The beamless vertical crane stop safety locking device according to claim 2, characterized in that, Both the left and right sides of the tooth's mid-edge are inclined inward by five degrees.

8. A beamless vertical milling machine, comprising a gearbox, characterized in that, The input shaft of the gearbox is equipped with a safety locking device for stopping a beamless vertical machine as described in any one of claims 1-7.

9. A method for using a safety locking device for stopping a beamless vertical crane, characterized in that, Includes the following steps: S1. The safety locking device for stopping a beamless vertical machine as described in any one of claims 1-7 is installed on the input shaft of the gearbox of the beamless vertical machine; S2. During locking, the friction brake pads are pressed together to rub against the friction brake disc, so that the input shaft of the gearbox, which is coaxial with the friction brake disc, stops rotating. First, release the safety, then rotate the brake lever downwards around the brake lever shaft. The second shaped tooth on the brake lever engages with the first shaped tooth on the brake disc to complete the locking and parking maneuver. S3. When unlocking, rotate the locking brake lever upward around the brake lever shaft. The second eccentric tooth on the locking brake lever will disengage from the first eccentric tooth on the locking brake disc. Then release the friction brake pads. At this time, the gearbox input shaft can rotate freely. Then engage the safety mechanism.

10. The method of using the safety locking device for stopping a beamless vertical crane according to claim 9, characterized in that, To release the safety, lift the operating knob to separate the convex and concave structures, then rotate the operating knob to complete the opening operation. At this time, the locking pin compresses the compression spring. When locking, the operating knob is rotated, and the locking pin moves downward and is inserted into the radial countersunk hole by the elastic force of the compression spring. At the same time, the convex structure penetrates into the concave structure to complete the locking.

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