An expansion board self-locking device

Abstract

The present invention discloses an expansion board self-locking device, including: a bracket assembly, which includes a fixed bracket, a locking bracket arranged at the end of the fixed bracket, and a motor bracket arranged at the lower end of the locking bracket; a driving assembly, which includes an electric push rod arranged on the electric bracket and a connecting plate arranged at the end of the electric push rod; and a locking assembly, the locking assembly is arranged on the connecting plate, and the electric push rod is provided with a locking component. When the locking component locks the electric push rod, the first end of the electric push rod cannot be telescoped, so that the self-locking push rod no longer moves, thereby maintaining the locked state. The locking is achieved through the threaded engagement between the limit lock head and the action wheel support rod. This device is applicable to various complex road surfaces; at the same time, it also has multiple locking functions and can still maintain the locked state in the case of power failure of the motor and other situations.

Description

Technical Field

[0001] The present invention relates to the technical field of expansion board locking, and in particular to a self-locking device for an expansion board. Background Art

[0002] To facilitate the transportation and movement of equipment and increase the available space inside mobile equipment, adding an expansion board with shock-absorbing casters has become a common solution. The self-locking of traditional expansion board casters is generally achieved by restricting shock displacement. This method is very easy to damage the shock absorption performance and cause irreversible damage to the shock absorption structure. Moreover, it has high requirements for the working ground environment. On pitted ground, the casters are prone to angular displacement under external forces, resulting in self-locking failure and serious safety hazards. In view of this phenomenon, the present invention proposes a new type of expansion board self-locking device, which can effectively solve the locking problem of the casters, adapt to various complex working conditions, and make it safe and reliable. Summary of the Invention

[0003] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Simplifications or omissions may be made in this part, as well as in the abstract and title of the specification of this application, to avoid obscuring the purpose of this part, the abstract, and the title. However, such simplifications or omissions shall not be used to limit the scope of the present invention.

[0004] In view of the problems existing in the existing expansion board self-locking devices, the present invention is proposed.

[0005] To solve the above technical problems, the present invention provides the following technical solution: A self-locking device for an expansion board, comprising: a bracket assembly, including a fixed bracket, a locking bracket provided at the end of the fixed bracket, and a motor bracket provided at the lower end of the locking bracket; a driving assembly, including an electric push rod provided on the electric bracket and a connecting plate provided at the end of the electric push rod; and a locking assembly, which is provided on the connecting plate.

[0006] As a preferred solution of the self-locking device for an expansion board of the present invention, wherein: the locking assembly includes a self-locking push rod provided on the locking bracket, a second through hole opened at one end of the locking bracket, and a bearing bronze sleeve provided in the second through hole. One end of the self-locking push rod is cooperatively connected with the bearing bronze sleeve, and the self-locking push rod is inserted into the upper end of the connecting plate.

[0007] A washer is provided at the insertion part of the self-locking push rod and the connecting plate.

[0008] As a preferred embodiment of the self-locking device for the expansion board of the present invention, the following is provided: A limit lock head is provided at one end of the self-locking push rod away from the connection board. A first through hole is formed between the fixed bracket and the locking bracket. A spring baffle is provided in the middle of the self-locking push rod. A spring is sleeved outside the self-locking push rod, and the spring is arranged between the spring baffle and the locking bracket.

[0009] As a preferred embodiment of the self-locking device for the expansion board of the present invention, the following is provided: A moving wheel support rod is provided on the fixed bracket. A first thread is provided outside the moving wheel support rod. A second thread that mates with the first thread is provided for the second end of the limit lock head 11.

[0010] Among them, a rectangular groove is formed on the moving wheel support rod. A thrust screw is slidably connected to the fixed bracket, and the thrust screw cooperates with the rectangular groove. The rectangular groove is formed along the length direction of the moving wheel support rod.

[0011] As a preferred embodiment of the self-locking device for the expansion board of the present invention, the following is provided: A locking component is provided at the end of the electric push rod. The locking component includes a locking ring rotatably connected inside the fixed bracket, a side groove formed on the locking ring, and a plurality of locking rods rotatably connected to the inner side of the fixed bracket.

[0012] Among them, the rotation plane of the locking rod is a horizontal plane. A plurality of rotating blocks are rotatably connected in the side groove, and the rotating blocks are slidably connected to the locking rods.

[0013] As a preferred embodiment of the self-locking device for the expansion board of the present invention, the following is provided: A clamping block is rotatably connected inside the fixed bracket. A driving rod is rotatably connected to the clamping block. A mating ring is provided on the locking ring. A driving block is rotatably connected to the mating ring. The driving rod is connected to the driving block, and a driving member for driving the driving rod to rotate is provided on the clamping block.

[0014] As a preferred embodiment of the self-locking device for the expansion board of the present invention, the following is provided: The driving member includes a stepping motor and a starting circuit board provided on the stepping motor. A displacement monitoring member is provided on the locking ring, and an infrared transceiver is provided on the displacement monitoring member.

[0015] As a preferred embodiment of the self-locking device for the expansion board of the present invention, the following is provided: An external thread is provided on the driving rod. An internal threaded hole is formed on the driving block. A clamping groove is formed at the end of the locking rod. A guide wheel is rotatably connected in the clamping groove, and a rubber layer is attached to the surface of the guide wheel.

[0016] The beneficial effects of the present invention: Multiple locking means are used to prevent the phenomenon of self-locking failure.

[0017] 1. Locking is achieved through the threaded engagement of the limit lock head and the moving wheel support rod, which is suitable for various complex road surfaces;

[0018] 2. A rectangular groove with a certain depth is opened along the axial direction of the driving wheel support rod. The thrust screw restricts the circumferential angular displacement of the driving wheel support rod through the rectangular groove, providing a secondary guarantee for the reliable locking function.

[0019] 3. A spring in a compressed state is installed on the self-locking push rod. The elastic force of the spring exerts a thrust on the self-locking push rod through the spring baffle. When the motor is powered off, the limit lock head can still be in close contact with the driving wheel support rod to maintain the locked state.

[0020] 4. The electric push rod is provided with a locking component. When the locking component locks the electric push rod, the first end of the electric push rod cannot extend or retract, causing the self-locking push rod to stop moving, thereby maintaining the locked state. The locking is achieved through the threaded engagement between the limit lock head and the driving wheel support rod. This device is applicable to various complex road surfaces and also has multiple locking functions, being able to maintain the locked state even in situations such as when the motor is powered off. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. Among them:

[0022] Figure 1 Schematic diagram of the connection between the fixed bracket of the self-locking device for the extension board of the present invention and the driving wheel support rod.

[0023] Figure 2 Schematic diagram of the structure of the locking component of the self-locking device for the extension board of the present invention.

[0024] Figure 3 Cross-sectional view of the overall structure of the self-locking device for the extension board of the present invention in the locked state.

[0025] Figure 4 Schematic diagram of the structure of the locking component of the self-locking device for the extension board of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0026] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the following will provide a detailed description of the specific embodiments of the present invention in conjunction with the drawings of the specification.

[0027] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0028] Second, the "one embodiment" or "embodiment" mentioned herein refers to specific features, structures or characteristics that may be included in at least one implementation manner of the present invention. The "in one embodiment" that appears in different places in this specification does not all refer to the same embodiment, nor is it a separate or selectively mutually exclusive embodiment with other embodiments.

[0029] Thirdly, the present invention is described in detail in conjunction with schematic diagrams. When detailing the embodiments of the present invention, for the convenience of explanation, the cross-sectional views showing the device structure will be locally enlarged out of the general proportion, and the schematic diagrams are only examples and should not limit the scope of protection of the present invention herein. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in actual production.

[0030] Embodiment 1

[0031] Referring to Figures 1-4 , which is the first embodiment of the present invention, a self-locking device for an expansion board is provided. The self-locking device for the expansion board is composed of a bracket assembly 100, a driving assembly 200, a locking assembly 300 and a moving wheel strut 400. In this embodiment, the bracket assembly 100 includes a fixed bracket 101, a locking bracket 102 and a motor bracket 103. One end of the fixed bracket 101 is fixedly connected to the second end of the locking bracket 102; the lower part of the locking bracket 102 is fixedly connected to the upper part of the motor bracket 103. Preferably, the fixed bracket 101 is fixedly connected to the locking bracket 102 by screws; the locking bracket 102 is fixedly connected to the motor bracket 103 by screws.

[0032] The driving assembly 200 includes an electric push rod 201 and a connecting plate 202. The electric push rod 201 is installed on the motor bracket 103; the electric push rod 201 is fixed on the motor bracket 103 by interference fit. The first end of the electric push rod 201 can be telescopic, and the first end of the electric push rod 201 is fixedly connected to the lower part of the connecting plate 202; the electric push rod 201 is connected to the locking assembly 200 through the connecting plate 202.

[0033] Further, the locking assembly 300 includes a self-locking push rod 301, a limit lock head 305, a spring 308, a spring 308 baffle 307, a thrust screw 404, a bearing bronze bushing 303 and an open washer 304. The self-locking push rod 301 is installed on the locking bracket 102; a second through hole 302 is provided at the first end of the locking bracket 102, and a bearing bronze bushing 303 is provided in the second through hole 302. The bearing bronze bushing 303 can slide along the second through hole 302; the first end of the self-locking push rod 301 is fixedly installed in the bearing bronze bushing 303 in a matching manner, and the self-locking push rod 301 can slide along the second through hole 302 together with the bearing bronze bushing 303; the self-locking push rod 301 is installed on the locking bracket 102 through the bearing bronze bushing 303, and the first end of the self-locking push rod 301 is fixedly connected to the upper part of the connecting plate 202.

[0034] Furthermore, the first end of the self-locking push rod 301 is fixedly connected to the upper part of the connecting plate 202 through an opening washer 304, and the second end of the self-locking push rod 301 is connected to the first end of the limit lock head 305; further, the limit lock head 305 is fixed to the second end of the self-locking push rod 301 through a flat key. A first through hole 306 is provided between the fixed bracket 101 and the locking bracket 102. The second end of the limit lock head 305 can pass through the first through hole 306. A spring 308 baffle 307 is provided in the middle of the self-locking push rod 301; the spring 308 is sleeved on the self-locking push rod 301; the spring 308 is arranged between the spring 308 baffle 307 and the inner wall of the first end of the locking bracket 102. When the limit lock head 305 is far from the action wheel support rod 400, the spring 308 is in a compressed state. Preferably, when the self-locking push rod 301 moves towards the action wheel support rod 400 and the limit lock head 305 abuts against the action wheel support rod 400, the spring 308 is still in a compressed state and has elastic force. When the first end of the electric push rod 201 expands and contracts, it can drive the self-locking push rod 301 to move in the same direction through the fixed bracket 101.

[0035] Further, an action wheel support rod 400 is installed in the fixed bracket 101. The action wheel support rod 400 is placed on the fixed bracket 101 through a copper sleeve. The action wheel support rod 400 can be extended or shortened. A first thread 401 is provided on the outer side of the action wheel support rod 400. The direction of the first thread 401 is perpendicular to the telescopic direction (support rod direction) of the action wheel support rod 400. A second thread 402 is provided for fitting with the second end of the limit lock head 305. The second thread 402 of the limit lock head 305 can be engaged into the first thread 401 of the action wheel support rod 400. After the second thread 402 of the limit lock head 305 can be engaged into the first thread 401 of the action wheel support rod 400, the action wheel support rod 400 cannot be telescoped, but can have an angular displacement.

[0036] Further, a rectangular groove 403 is provided in the action wheel support rod 400 along the support rod direction. The self-locking device further includes a thrust screw 404. A third through hole is provided on the side of the fixed bracket 101. The thrust screw 404 is installed on the through hole of the fixed bracket 101; the thrust screw 404 can protrude from the third through hole; when the thrust screw 404 protrudes from the third through hole, one end of the thrust screw 404 can be caught in the rectangular groove 403 of the action wheel support rod 400. After one end of the thrust screw 404 can be caught in the rectangular groove 403 of the action wheel support rod 400, the action wheel support rod 400 cannot have an angular displacement, but can be telescoped.

[0037] A locking member 500 is further provided on the electric push rod 201. The locking member 500 can lock the electric push rod 201. When the locking member 500 locks the electric push rod 201, the first end of the electric push rod 201 cannot expand and contract.

[0038] Operation process: First, install the self-locking device of the extension board at an appropriate position on the device. The moving wheel support rod 400 is fixedly connected to the moving wheel. When the device moves to an appropriate position, the electric push rod 201 fixed on the motor bracket 103 is powered on and starts to work, driving the connecting plate 202 to move leftward. The connecting plate 202 drives the self-locking push rod 301 installed on the locking bracket 102 through the bracket copper sleeve together with the opening washer 304 to move leftward. The self-locking push rod 301 drives the limit lock head 305 to move leftward through the flat key, so that the limit lock head 305 is inserted into the thread of the moving wheel support rod 400, restricting the displacement of the moving wheel support rod 400 in the vertical direction. At the same time, the thrust screw 404 installed on the fixed support is stuck into the rectangular groove 403 of the moving wheel support rod 400, restricting the angular displacement of the moving wheel, thereby achieving the self-locking effect.

[0039] When releasing the locked state, the electric push rod 201 is powered on and starts to rotate in the reverse direction, driving the connecting plate 202 to move rightward. The connecting plate 202 drives the self-locking push rod 301 together with the opening washer 304 to move rightward. The self-locking push rod 301 drives the limit lock head 305 to move rightward, so that the limit lock head 305 leaves the thread of the moving wheel support rod 400, realizing the free displacement of the moving wheel support rod 400 in the vertical direction. At the same time, the thrust screw 404 installed on the fixed support is pulled out from the rectangular groove 403 of the moving wheel support rod 400, and the moving wheel support rod 400 can rotate.

[0040] Embodiment 2

[0041] Refer to Figures 1-4 , which is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that in this embodiment, the strengthening component includes a locking ring 501 rotatably connected inside the fixed bracket 101. The inner diameter of the locking ring 501 is the same as the opening diameter of the upper end of the fixed bracket 101. Three side slots 502 are also opened on the side of the locking ring 501. The three side slots 502 are not connected to each other. At the same time, at the position corresponding to each side slot 502, that is, on the upper surface of the fixed bracket 101, a locking rod 503 is also rotatably connected. There are three locking rods 503, and they extend into the center position of the locking ring 501 through the side slots 502.

[0042] Further, a number of rotating blocks 504 are rotatably connected in each side slot 502. The rotating blocks 504 are slidably connected to the locking rod 503. Thus, after the locking ring 501 rotates, it can drive the rotation of the locking rod 503. Then, in order to drive the rotation of the locking ring 501, a clamping block 505 is rotatably connected to the upper end of the fixed bracket 101. A driving rod 506 is rotatably connected to the clamping block 505. A driving member 600 is arranged on the side wall of the clamping block 505. The driving member 600 is connected to the driving rod 506. Thus, it can drive the rotation of the driving rod 506. A mating ring 507 is arranged on the locking ring 501. A driving block 508 is rotatably connected to the mating ring 507. The driving rod 506 is connected to the driving block 508. An external thread is arranged on the driving rod 506. An internal thread hole is formed in the driving block 508. The internal thread hole is matched with the external thread. Thus, the forward and backward movement of the driving block 508 can be realized. The movement of the driving block 508 will drive the rotation of the locking ring 501 under the restriction of the mating ring 507. Then, it drives the swing of the locking rod 503. After the locking rod 503 swings, the end of the locking rod 503 will swing towards the direction of approaching or separating, realizing clamping or loosening.

[0043] Preferably, a clamping groove 603 is formed at the end of the locking rod 503. A guide wheel 604 is rotatably connected in the clamping groove 603. A rubber layer is attached to the surface of the guide wheel 604, which can increase the friction force during clamping.

[0044] In this embodiment, the driving member 600 includes a stepping motor 601 and a starting circuit board arranged on the stepping motor 601. The stepping motor 601 is connected to the rear end of the driving rod 506. A displacement monitoring member is arranged on the locking ring 501. Among them, the displacement monitoring member includes a detection block rotatably connected to the locking ring 501, a rotating wheel arranged on the detection block, and a microswitch arranged at the rear end of the rotating wheel. An infrared signal receiver is arranged on the starting circuit board. Thus, when the rotating wheel senses the sliding of the electric push rod 201, it can rotate accordingly. Then, the microswitch is started, making the stepping motor 601 start, and further clamping the electric push rod 201.

[0045] The remaining structure is the same as that in Embodiment 1.

[0046] Operation process: The cooperation of the internal thread hole and the external thread can realize the forward and backward movement of the driving block 508. The movement of the driving block 508 will drive the rotation of the locking ring 501 under the restriction of the mating ring 507. Then, it drives the swing of the locking rod 503. After the locking rod 503 swings, the end of the locking rod 503 will swing towards the direction of approaching or separating, realizing clamping or loosening.

[0047] Importantly, it should be noted that the construction and arrangement of the present application shown in multiple different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who refer to this disclosure should easily understand that many modifications are possible without materially departing from the novel teachings and advantages of the subject matter described in this application (e.g., changes in the dimensions, scales, structures, shapes and proportions of various elements, as well as parameter values (such as temperature, pressure, etc.), installation arrangements, use of materials, colors, orientations, etc.). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature, number or position of discrete elements may be altered or changed. Accordingly, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means-plus-function" clause is intended to cover the structures that perform the recited function described herein, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the present invention is not limited to specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0048] In addition, in order to provide a concise description of the exemplary embodiments, all features of the actual embodiments may not be described (i.e., those features that are not relevant to the currently contemplated best mode of carrying out the present invention, or those features that are not relevant to the implementation of the present invention).

[0049] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous specific implementation decisions may be made. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, the development efforts will be a routine task of design, manufacture and production without excessive experimentation.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention may be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. An expansion board self-locking device, characterized in that: Comprising, A bracket assembly (100), including a fixed bracket (101), a locking bracket (102) arranged at the end of the fixed bracket (101), and a motor bracket (103) arranged at the lower end of the locking bracket (102); A drive assembly (200), including an electric push rod (201) arranged on the electric bracket and a connecting plate (202) arranged at the end of the electric push rod (201); and, A locking assembly (300), the locking assembly (300) being arranged on the connecting plate (202); The locking assembly (300) includes a self-locking push rod (301) arranged on the locking bracket (102), a second through hole (302) opened at one end of the locking bracket (102), and a support bushing (303) arranged in the second through hole (302). One end of the self-locking push rod (301) is cooperatively connected with the support bushing (303), and the self-locking push rod (301) is inserted into the upper end of the connecting plate (202), A washer (304) is arranged at the insertion part of the self-locking push rod (301) and the connecting plate (202); A limit lock head (305) is arranged at one end of the self-locking push rod (301) away from the connecting plate (202). A first through hole (306) is opened between the fixed bracket (101) and the locking bracket (102). A spring (308) baffle (307) is arranged in the middle of the self-locking push rod (301). A spring (308) is sleeved outside the self-locking push rod (301), and the spring (308) is arranged between the spring (308) baffle (307) and the locking bracket (102); An action wheel support rod (400) is arranged on the fixed bracket (101). A first thread (401) is arranged outside the action wheel support rod (400). A second thread (402) cooperatively matched with the first thread (401) is arranged at the second end of the limit lock head (305), Wherein, a rectangular groove (403) is opened on the action wheel support rod (400). A thrust screw (404) is slidably connected to the fixed bracket (101). The thrust screw (404) is cooperatively matched with the rectangular groove (403), and the rectangular groove (403) is opened along the length direction of the action wheel support rod (400).

2. The expansion board self-locking device according to claim 1, wherein: A locking component (500) is arranged at the end of the electric push rod (201). The locking component (500) includes a locking ring (501) rotatably connected in the fixed bracket (101), a side groove (502) opened on the locking ring (501), and a plurality of locking rods (503) rotatably connected to the inner side of the fixed bracket (101), Wherein, the rotation plane of the locking rod (503) is a horizontal plane. A plurality of rotating blocks (504) are rotatably connected in the side groove (502), and the rotating blocks (504) are slidably connected to the locking rods (503).

3. The expansion board self-locking device according to claim 2, characterized in that: A clamping block (505) is rotatably connected inside the fixed bracket (101). A driving rod (506) is rotatably connected to the clamping block (505). A matching ring (507) is arranged on the locking ring (501). A driving block (508) is rotatably connected to the matching ring (507). The driving rod (506) is connected to the driving block (508). A driving member (600) for driving the driving rod (506) to rotate is arranged on the clamping block (505).

4. The expansion board self-locking device according to claim 3, wherein: The driving member (600) includes a stepping motor (601) and a starting circuit board arranged on the stepping motor (601). A displacement monitoring member is arranged on the locking ring (501). An infrared transceiver (602) is arranged on the displacement monitoring member.

5. The expansion board self-locking device according to claim 4, wherein: External threads are arranged on the driving rod (506). An internal threaded hole is formed in the driving block (508). A clamping groove (603) is formed at the end of the locking rod (503). A guide wheel (604) is rotatably connected in the clamping groove (603). A rubber layer is attached to the surface of the guide wheel (604).

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