Centering self-locking device

Abstract

The utility model discloses a centering self-locking device which comprises a base plate, a centering mechanism is arranged on the upper surface of the base plate, and the centering mechanism comprises a centering base, a set of positioning rods arranged in the centering base, a driving assembly and a positioning locking assembly. The driving assembly at least comprises a rotatable cover plate, a set of arc-shaped guide openings extending from the center to the edge are formed in the cover plate, and the positioning rods penetrate through the arc-shaped guide openings. The rotary cover plate drives the positioning rod to move along the diameter direction of the base; the positioning locking assembly limits the moving position of the positioning rod. The utility model has the advantages that the arc-shaped guide port on the cover plate drives the positioning rod to synchronously move in the linear direction towards the center of the cover plate or the edge of the cover plate, and the movement is limited by the edge of the arc-shaped guide port and the locking component when the movement is stopped, so that the condition of inaccurate positioning caused by displacement deviation of the positioning rod due to inertia is effectively prevented; a driving part and / or a linkage part are / is not required to drive the positioning rod to move synchronously; moving and positioning are more stable, the structure is simple, and the manufacturing cost is low.

Description

Technical Field

[0001] The utility model belongs to the technical field of equipment manufacturing, in particular to a centering self-locking device. Background Art

[0002] The brake is a device that has the function of slowing down, stopping or keeping the moving parts (or moving machinery) stopped. It is a moving part in the machinery, a mechanical part that stops or slows down. The wheel brake is mainly composed of a rotating part (such as a brake drum), a fixed part (such as a brake shoe, a brake base plate) and an adjustment mechanism (such as an adjustment cam). These parts work together to achieve the braking effect on the vehicle.

[0003] During the assembly of the brake, the stability of its installation position and the concentricity of the installed parts are important factors in determining whether the assembly is qualified. Since the sizes of brakes in different places of use are different, the production cost of equipping each size of brake with a set of assembly equipment that matches its size is high, and the utilization rate of a single assembly equipment is too low, so it is very necessary to design an assembly device that can be applied to brakes of various sizes.

[0004] The structure designed for brakes of various sizes in the prior art can refer to patent CN208399159U, "Automatic tire centering and positioning device". Most of the prior art including this technical solution uses a driving mechanism to linearly drive the positioning rod. Since there are at least two positioning rods, a linkage or transmission structure needs to be set between the multiple positioning rods to ensure the synchronous centering movement of the positioning rods. These existing structures that drive the centering movement of the positioning rods by setting up a separate driving mechanism require a certain assembly space, otherwise the driving mechanism is easy to interfere with other equipment.

[0005] Furthermore, since most of the prior art uses a linear drive mechanism to drive the positioning rod to move linearly, if the driving mechanism is fast, the positioning rod will move forward or backward due to inertia when it stops, causing positioning deviation, affecting the positioning accuracy and brake assembly stability; if the driving mechanism is slow, the positioning time is long, reducing assembly efficiency. In addition, in the above patents, the positioning rods are connected by a synchronous belt. As is known to all, the synchronous belt will produce certain wear and fatigue during long-term use, so some personnel are required to regularly inspect the equipment or replace the synchronous belt, and the maintenance costs of personnel and equipment will inevitably increase. In order to solve the above problems, designing a centering self-locking device is an important technical problem that technicians in this field need to solve. Utility Model Content

[0006] The purpose of the utility model is to solve the above problems existing in the prior art and to provide a centering self-locking device.

[0007] The purpose of the utility model is achieved through the following technical solutions:

[0008] A centering self-locking device comprises a base plate, the upper surface of which is provided with a centering mechanism, the centering mechanism comprises a centering base, a group of positioning rods arranged in the centering base, a driving assembly and a positioning locking assembly; the driving assembly comprises at least a rotatable cover plate, the cover plate is formed with a group of arc-shaped guide openings extending from the center to the edge, and the positioning rods pass through the arc-shaped guide openings; the cover plate is rotated to drive the positioning rods to move along the diameter direction of the base; the positioning locking assembly limits the moving position of the positioning rod.

[0009] Preferably, the positioning rod is connected to the centering base via a sliding assembly, and the sliding assembly includes a slide rail fixed on the centering base and a slider arranged on the slide rail; the positioning rod is connected to the slider via a connecting block.

[0010] Preferably, guide blocks are also arranged in parallel on both sides of the slide rail, and both sides of the connecting block are in contact with the upper surface of the guide blocks.

[0011] Preferably, there are at least two positioning rods, and the number of the positioning rods is consistent with the number of the arc-shaped guide openings; the top end of the positioning rod is conical, and a positioning protrusion extends upward from the top end.

[0012] Preferably, the driving assembly also includes a handle for driving the cover plate to rotate; the handle passes through a through hole 1 on the side wall of the centering base, and its through end is fixedly connected to the cover plate via a mounting block; the handle moves along the setting direction of the through hole 1, and drives the cover plate to rotate around its center point.

[0013] Preferably, a second through hole is further provided on the side wall of the centering base; the positioning locking assembly includes a locking rod passing through the second through hole, a stop block fixed to the through end of the locking rod, and a locking block sleeved on the proximal end of the locking rod; an external force drives the locking rod to move along the diameter direction of the centering base until the stop block abuts against the connecting block; the locking block rotates around the axis of the locking rod.

[0014] Preferably, a lifting mechanism is coaxially arranged below the centering mechanism, and the lifting mechanism at least partially penetrates the substrate and the centering mechanism and abuts against the center of the brake to drive the brake to reciprocate in the vertical direction.

[0015] Preferably, the lifting mechanism is arranged on a lifting base, and the lifting base is fixed to the lower surface of the substrate; the lifting mechanism includes a cylinder fixed on the lifting base, a connecting shaft arranged on the cylinder driving shaft, a push rod tightly connected to the connecting shaft, and a support rod arranged at the top end of the push rod; the cylinder drives the support rod to penetrate the top cover plate and be plugged into the center of the brake.

[0016] Preferably, the cross-section of the push rod is convex, and its convex part passes through the centering mechanism; a sleeve is fixedly provided at the center of the centering base, an elastic member is provided between the bottom end of the sleeve and the push rod, and the sleeve is sleeved on the outer periphery of the convex part of the push rod.

[0017] Preferably, a steel ball accommodating groove with a diameter larger than the inner diameter of its main body is provided at the top end of the sleeve, and a guide slope is formed on the side wall of the steel ball accommodating groove; a through hole for accommodating steel balls is formed on the side wall of the push rod near its top end; a steel ball groove is formed on the side wall of the support rod near its lower part; in the first state, the steel ball is located in the guide slope and the through hole, and the support rod is in a free state; in the second state, the steel ball is located in the through hole and the steel ball groove, the support rod is in a locked state, and rises and falls synchronously with the push rod.

[0018] The advantages of the technical solution of the utility model are mainly reflected in:

[0019] A group of positioning rods are driven to move synchronously toward the center or edge of the cover plate in a straight line through the arc-shaped guide opening on the cover plate, and the edge of the arc-shaped guide opening limits the movement when the movement stops, effectively preventing the positioning rods from having displacement deviations due to inertia, resulting in inaccurate positioning; and after any positioning rod moves into position, it is stopped from moving by the locking assembly, and is limited in movement by the edge of the arc-shaped guide opening while in contact, without the need for additional driving components and / or linkage components to drive the positioning rods to move synchronously; movement and positioning are more stable, the structure is simple, and the manufacturing cost is low;

[0020] By arranging guide blocks in parallel on both sides of the sliding assembly, the slide rail and the positioning rod arranged above the slide rail will not shake during the movement, thereby increasing the stability of movement;

[0021] A steel ball is arranged at the connection between the top rod and the support rod. The connection and disconnection of the top rod and the support rod are achieved by moving the steel ball outward or inward, so that the two can be raised and lowered synchronously, and partial locking is achieved after the two are connected, thereby enhancing the stability of the brake during the descent process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 : A three-dimensional diagram of a preferred embodiment of the utility model;

[0023] Figure 2: A cross-sectional view of a preferred embodiment of the utility model;

[0024] Figure 3 : A three-dimensional diagram of the centering mechanism of the preferred embodiment of the utility model;

[0025] Figure 4 : A cross-sectional view of the centering mechanism of a preferred embodiment of the utility model;

[0026] Figure 5 : The positioning rod structure diagram of the preferred embodiment of the utility model. DETAILED DESCRIPTION

[0027] The purpose, advantages and features of the present invention will be illustrated and explained through the non-limiting description of the following preferred embodiments. These embodiments are only typical examples of the application of the technical solution of the present invention, and any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection claimed by the present invention.

[0028] In the description of the scheme, it should be noted that the terms "center", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Moreover, in the description of the scheme, with the operator as a reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0029] like Figure 1 As shown, the utility model discloses a centering self-locking device, including a base plate 1, a centering mechanism 2 is arranged on the upper surface of the base plate 1, and the centering mechanism 2 includes a centering base 21, a group of positioning rods 22 arranged in the centering base 21, a driving component 23 and a positioning locking component 24. The driving component 23 drives the positioning rod 22 to reciprocate along the diameter direction of the centering base 21, and after moving to a position, the positioning rod 22 is limited by the positioning locking component 24 to ensure the stability of the moving position.

[0030] Specific combination Figure 1 and Figure 3 As shown, there are at least two positioning rods 22. In order to better support the centering of the brake in this application, three positioning rods 22 are preferably provided. The number of positioning rods 22 can be adjusted according to the positioning requirements of the brake and is not limited here. Figure 5As shown, the present application preferably designs the top end of the positioning rod 22 to be conical in shape, and a positioning protrusion 221 extends upward from the top end thereof, and by plugging the protrusion 221 into the positioning hole at the bottom end of the brake, the stability of the brake placement position is ensured, and the contact area between the two is reduced, thereby reducing the friction during the operation of the brake, thereby improving the brake yield and extending the service life of the positioning rod.

[0031] Further, such as Figure 4 As shown, the positioning rod 22 is connected to the centering base 21 through a sliding assembly. Specifically, the sliding assembly includes a slide rail 251 fixed on the centering base 21 and a slider 252 arranged on the slide rail 251; the positioning rod 22 is connected to the slider 252 through a connecting block 225. Since the slide rail 251 is arranged along the diameter direction of the centering base 21, the positioning rod 22 will move along the diameter direction of the centering base 21. Furthermore, guide blocks 253 are also arranged in parallel on both sides of the slide rail 251, and both sides of the connecting block 225 are in contact with the upper surface of the guide block 253. By arranging the guide blocks in parallel on both sides of the sliding assembly, the slide rail and the positioning rod arranged above the slide rail will not shake during the movement, thereby increasing the stability of movement.

[0032] like Figure 3 to Figure 4 As shown, the driving assembly 23 at least includes a rotatable cover plate 231. Further, a group of arc-shaped guide openings 230 extending from the center to the edge are formed on the cover plate 231, and the positioning rods 22 pass through the arc-shaped guide openings 230; the number of the positioning rods 22 is consistent with the number of the arc-shaped guide openings 230. Further, the driving assembly 23 also includes a handle 232 for driving the cover plate 231 to rotate; that is, the handle 232 passes through the through hole 1 2301 on the side wall of the centering base 21, and its through end is fixedly connected to the cover plate 231 through a mounting block. The handle 232 moves along the setting direction of the through hole 1 2301, and drives the cover plate 231 to rotate around its center point. It can be seen that when the handle 232 is driven by external force to move along the through hole 1 2301, the cover plate 231 will be driven to rotate, and then the positioning rod 22 will be driven to move along the diameter direction of the base 21, and finally the moving position of the positioning rod 22 will be limited by the positioning locking assembly 24. A group of positioning rods are driven to move synchronously toward the center or edge of the cover plate through the arc-shaped guide opening on the cover plate, and the positioning rods are limited by the sliding assembly to move only in a straight line, and the moving position of the positioning rods is limited by the locking assembly to adapt to brakes of different diameters; there is no need to set up a separate driving component and / or linkage component to drive the positioning rods to move synchronously; the movement and positioning are more stable, the structure is simple and the manufacturing cost is low.

[0033] Further, such as Figure 3As shown, the outer edge of the cover plate 231 is provided with an arrow, and the upper surface of the cover plate 231 is provided with a diameter mark. When the cover plate 231 stops rotating, any diameter mark on it will be located on the same axis as the arrow. At this time, the diameter mark corresponding to the arrow indicates the diameter of the circle surrounded by the current positioning rod, or the brake of the diameter size that the current positioning rod can adapt to. It can be seen that the positioning rod can be quickly moved to the end position through the diameter mark, saving the positioning rod adjustment time and improving the positioning efficiency.

[0034] like Figure 3 or Figure 4 As shown, a second through hole 2302 is also provided on the side wall of the centering base 21. The positioning locking assembly 24 includes a locking rod 241 that passes through the second through hole 2302, a stop block 242 fixed to the through end of the locking rod 241, and a locking block 243 sleeved on the proximal end of the locking rod 241. The locking rod 241 is driven by an external force to move along the diameter direction of the centering base 21 until the stop block 242 abuts against the connecting block 225. After the stop block abuts against the connecting block, the locking block 243 can be rotated around the axis of the locking rod 241, so that personnel can quickly determine the state of the positioning locking assembly. Furthermore, the end diameter of the locking block 243 is larger than the width of the second through hole 2302. In addition, in the present application, a buffer is preferably provided on the side wall of the centering base 21, and the buffer is inserted into the second through hole 2302. The locking rod 241 can move relative to the buffer and play a role of vibration reduction and buffering when the locking block 243 contacts the buffer, thereby effectively preventing damage to the two due to hard contact and extending their service life.

[0035] like Figure 1 to Figure 2 As shown, a lifting mechanism 3 is coaxially arranged below the centering mechanism 2, and the lifting mechanism 3 at least partially penetrates the substrate 1 and the centering mechanism 2, and abuts against the center of the brake to drive the brake to reciprocate in the vertical direction.

[0036] Furthermore, the lifting mechanism 3 is arranged on a lifting base 30, and the lifting base 30 is fixed to the lower surface of the substrate 1. The lifting mechanism 3 includes a cylinder 31 fixed on the lifting base 30, a connecting shaft 32 arranged on the driving shaft of the cylinder 31, a push rod 33 tightly connected to the connecting shaft 32, and a support rod 34 arranged at the top of the push rod 33. The cylinder 31 drives the support rod 34 to penetrate the top cover plate 231 and plug into the center of the brake. The lifting mechanism drives the support rod to move along its driving direction, and the brake is supported and placed on the positioning rod to ensure the stability of the brake during the lifting process.

[0037] like Figure 2As shown, the cross section of the push rod 33 is convex, and its convex part penetrates the centering mechanism 2. A sleeve 35 is fixedly arranged at the center of the centering base 21, and an elastic member 4 is arranged between the bottom end of the sleeve 35 and the push rod 33, and the sleeve 35 is sleeved on the outer periphery of the convex part of the push rod 33. When the cylinder 31 drives the push rod 33 to move upward, the elastic member 4 is compressed; otherwise, the elastic member 4 is reset. The elastic member effectively avoids hard contact between the push rod and the sleeve, reduces component damage caused by hard contact, and extends the service life of the equipment.

[0038] Furthermore, the top of the sleeve 35 is provided with a steel ball receiving groove 350 having a diameter greater than the inner diameter of the main body thereof, and the side wall of the steel ball receiving groove 350 is formed with a guide slope 351. A through hole 330 for receiving the steel ball 36 is provided on the side wall of the push rod 33 near its top; and a steel ball groove 340 is provided on the side wall of the support rod 34 near its bottom. In the first state, the cylinder 31 is started to drive the push rod 22 and the support rod 34 to move upward synchronously until the top of the support rod 34 abuts against the center of the brake and is connected to the brake; at this time, the steel ball 36 is located in the guide slope 351 and the open through hole 330, and the support rod 34 is in a free state. When moving upward, the support rod 34 can move upward synchronously with the push rod 33 under the action of the push rod 33; but when moving downward, in order to prevent the support rod 34 from being separated from the push rod 33, the two are movably connected through the steel ball 36. In the second state, the cylinder 31 is reset, driving the push rod 33 and the support rod 34 to move downward relative to the shaft sleeve 35; the outer surface of the catch 36 moves toward the side wall of the support rod 24 under the guidance of the guide slope 351 until the steel ball 36 is located in the through hole 330 and the steel ball groove 340; at this time, the support rod 34 is in a locked state and rises and falls synchronously with the push rod 33. A steel ball is set at the connection between the push rod and the support rod, and the connection and separation of the push rod and the support rod are realized by moving the steel ball outward or inward, so that the two can rise and fall synchronously, and partial locking is realized after the two are connected, thereby enhancing the stability of the brake during the descent process.

[0039] There are many implementation methods of the utility model, and all technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of the utility model.

Claims

1. A centering self-locking device, characterized in that: The invention comprises a base plate (1), wherein a centering mechanism (2) is arranged on the upper surface of the base plate (1), wherein the centering mechanism (2) comprises a centering base (21), a group of positioning rods (22) arranged in the centering base (21), a driving assembly (23) and a positioning locking assembly (24); the driving assembly (23) comprises at least a rotatable cover plate (231), wherein a group of arc-shaped guide openings (230) extending from the center to the edge are formed on the cover plate (231), and the positioning rods (22) pass through the arc-shaped guide openings (230); the cover plate (231) is rotated to drive the positioning rods (22) to move along the diameter direction of the base (21); and the positioning locking assembly (24) limits the moving position of the positioning rods (22).

2. A centering self-locking device according to claim 1, characterized in that: The positioning rod (22) is connected to the centering base (21) via a sliding assembly, wherein the sliding assembly comprises a slide rail (251) fixed on the centering base (21) and a slide block (252) arranged on the slide rail (251); the positioning rod (22) is connected to the slide block (252) via a connecting block (225).

3. A centering self-locking device according to claim 2, characterized in that: Guide blocks (253) are also arranged in parallel on both sides of the slide rail (251), and both sides of the connection block (225) are in contact with the upper surface of the guide blocks (253).

4. A centering self-locking device according to claim 3, characterized in that: There are at least two positioning rods (22), the number of which is consistent with the number of the arc-shaped guide openings (230); the top end of the positioning rod (22) is in a cone shape, and a positioning protrusion (221) extends upward from the top end.

5. A centering self-locking device according to claim 4, characterized in that: The driving assembly (23) further comprises a handle (232) for driving the cover plate (231) to rotate; the handle (232) passes through a through hole 1 (2301) on the side wall of the centering base (21), and its through end is fixedly connected to the cover plate (231) via a mounting block; the handle (232) moves along the setting direction of the through hole 1 (2301), and drives the cover plate (231) to rotate around its center point.

6. A centering self-locking device according to claim 5, characterized in that: The side wall of the centering base (21) is also provided with a second through hole (2302); the positioning locking assembly (24) includes a locking rod (241) passing through the second through hole (2302), a stop block (242) fixed to the through end of the locking rod (241), and a locking block (243) sleeved on the proximal end of the locking rod (241); an external force drives the locking rod (241) to move along the diameter direction of the centering base (21) until the stop block (242) abuts against the connecting block (225); the locking block (243) rotates around the axis of the locking rod (241).

7. A centering self-locking device according to claim 6, characterized in that: A lifting mechanism (3) is coaxially arranged below the centering mechanism (2), and the lifting mechanism (3) at least partially penetrates the substrate (1) and the centering mechanism (2) and abuts against the center of the brake to drive the brake to reciprocate in the vertical direction.

8. A centering self-locking device according to claim 7, characterized in that: The lifting mechanism (3) is arranged on a lifting base (30), and the lifting base (30) is fixed to the lower surface of the base plate (1); the lifting mechanism (3) comprises a cylinder (31) fixed on the lifting base (30), a connecting shaft (32) arranged on the driving shaft of the cylinder (31), a push rod (33) tightly connected to the connecting shaft (32), and a support rod (34) arranged at the top end of the push rod (33); the cylinder (31) drives the support rod (34) to penetrate the top cover plate (231) and be plugged into the center of the brake.

9. A centering self-locking device according to claim 8, characterized in that: The cross section of the push rod (33) is convex, and its convex portion passes through the centering mechanism (2); a shaft sleeve (35) is fixedly arranged at the center of the centering base (21), an elastic member (4) is arranged between the bottom end of the shaft sleeve (35) and the push rod (33), and the shaft sleeve (35) is sleeved on the outer periphery of the convex portion of the push rod (33).

10. A centering self-locking device according to claim 9, characterized in that: The top end of the shaft sleeve (35) is provided with a steel ball receiving groove (350) having a diameter greater than the inner diameter of the main body thereof, and the side wall of the steel ball receiving groove (350) is formed with a guiding inclined surface (351); a through hole (330) for receiving a steel ball (36) is formed on the side wall of the push rod (33) near its top end; a steel ball groove (340) is formed on the side wall of the support rod (34) near its bottom; in a first state, the steel ball (36) is located in the guiding inclined surface (351) and the through hole (330), and the support rod (34) is in a free state; in a second state, the steel ball (36) is located in the through hole (330) and the steel ball groove (340), and the support rod (34) is in a locked state and rises and falls synchronously with the push rod (33).

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