Anti-rebound device and gate

Abstract

The utility model provides an anti-rebound device and a gate, and relates to the technical field of nuclear power equipment. The gate comprises an anti-rebound device. The anti-springback device comprises a position adjusting shaft bolt and a locking sleeve which are matched with each other; one of the position adjusting shaft bolt and the locking sleeve is used for being installed on a door body, and the other one of the position adjusting shaft bolt and the locking sleeve is used for being installed on a cabin panel. The locking sleeve is provided with a mounting groove, and a movable fixing piece is arranged in the mounting groove; the position adjusting shaft bolt is movably arranged in the mounting groove, the position adjusting shaft bolt is provided with a locking part, and when the position adjusting shaft bolt is located in the mounting groove, the locking part is connected with the fixing piece. The reliability of the gate can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of nuclear power equipment, and particularly relates to a rebound prevention device and a gate. BACKGROUND

[0002] A containment in a nuclear power plant can separate a reactor from an external environment to prevent radioactive substances from spreading to the external environment through air, water or other means. A gate is an access passage for operating and maintenance personnel to enter and exit a safety cabin of the containment. Some tools and small equipment can be transported through the gate.

[0003] The gate mainly comprises a door body, a door bolt and a transmission mechanism. The door body is driven to be closed by the transmission mechanism, and the transmission mechanism continues to operate to drive the door bolt to be buckled after the door body is closed. In order to ensure the safety and sealing of the containment, the door body is relatively thick and heavy. When the door body is closed and contacts a cabin panel, a large kinetic energy is generated, the kinetic energy is converted into an impact force in an instant, and the impact force can cause the door body to rebound. The rebound can cause the transmission mechanism to be unable to continuously operate, thereby affecting the buckling of the door bolt, and causing the gate to have low reliability. CONTENT OF THE UTILITY MODEL

[0004] The rebound prevention device and the gate provided by the embodiments of the present application are used to solve the problem of low reliability of the gate.

[0005] The embodiments of the present application provide a rebound prevention device, which comprises a position adjusting shaft bolt and a locking sleeve matched with each other.

[0006] One of the position adjusting shaft bolt and the locking sleeve is used to be installed on the door body, and the other of the position adjusting shaft bolt and the locking sleeve is used to be installed on the cabin panel.

[0007] The locking sleeve is provided with a mounting groove, and a movable fixing member is arranged in the mounting groove.

[0008] The position adjusting shaft bolt is movably arranged in the mounting groove, the position adjusting shaft bolt is provided with a locking portion, and the locking portion is connected with the fixing member when the position adjusting shaft bolt is located in the mounting groove.

[0009] In some embodiments of the present application, the locking portion is arranged as a locking groove, and the locking groove is arranged on the outer surface of the position adjusting shaft bolt along the circumferential direction of the position adjusting shaft bolt.

[0010] In some embodiments of the present application, the fixing member can move along the inner wall of the mounting groove to be close to or away from the mounting groove.

[0011] When the fixing member is close to the inner wall of the mounting groove, the fixing member is separated from the locking groove.

[0012] When the fixing member is away from the inner wall of the mounting groove, the fixing member is located in the locking groove, and the position adjusting shaft bolt is fixed with the locking sleeve.

[0013] In some embodiments of the present application, the number of the fixing members is multiple, and the fixing members are arranged in sequence and at intervals.

[0014] In some embodiments of the present application, the locking sleeve is provided with an elastic member, a first end of the elastic member is connected with the locking sleeve;

[0015] A second end of the elastic member is retractable in a direction close to or away from the locking sleeve, and the second end of the elastic member is connected with the fixing member.

[0016] In some embodiments of the present application, the locking sleeve is provided with an adjusting member, and the adjusting member is arranged in the locking sleeve;

[0017] The adjusting member is connected with the fixing member, and the adjusting member is movable in a direction close to or away from the center of the mounting groove.

[0018] In some embodiments of the present application, a first end of the adjusting member is located in the mounting groove, and a second end of the adjusting member is located outside the mounting groove;

[0019] The second end of the adjusting member is provided with a connecting portion, and the adjusting member is fixed with the locking sleeve through the connecting portion.

[0020] In some embodiments of the present application, the adjusting shaft bolt is provided with an extension member, and the extension member is arranged in the base of the door body;

[0021] The extension member is provided with a mounting portion, and the extension member is mounted on the base through the mounting portion.

[0022] In some embodiments of the present application, the number of the mounting portions is multiple, and the multiple mounting portions include a first mounting portion and a second mounting portion;

[0023] The first mounting portion and the second mounting portion are movably arranged in the extension member, the first mounting portion is used for abutting against at least a first surface of the door body, and the second mounting portion is used for abutting against at least a second surface of the door body.

[0024] Another aspect of the embodiments of the present application provides a gate, which comprises the anti-rebound device as described above.

[0025] The application provides a bounce-preventing device and a gate. The gate comprises a door body, a door bolt, the bounce-preventing device and a transmission mechanism. The transmission mechanism can drive the door body to close when rotating, and the transmission mechanism can drive the door bolt to close when continuously rotating. The bounce-preventing device comprises a position-adjusting shaft bolt and a locking sleeve which are matched with each other. One of the position-adjusting shaft bolt and the locking sleeve is arranged on the door body, and the other of the position-adjusting shaft bolt and the locking sleeve is arranged on a hatch cover. The locking sleeve is provided with a mounting groove, and the mounting groove is provided with a movable fixing member. The position-adjusting shaft bolt is movably arranged in the mounting groove, and the position-adjusting shaft bolt is provided with a locking portion. When the position-adjusting shaft bolt is arranged in the mounting groove, the locking portion is connected with the fixing member. An acting force can be generated between the locking portion and the fixing member, and the acting force is greater than an impact force when the door body is closed, so that the position-adjusting shaft bolt and the locking sleeve are in a locked state, and the door body is in a locked state, thereby preventing the door body from bouncing. In this way, the transmission mechanism can continuously rotate, the door bolt can be smoothly closed, and the reliability of the gate is improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] The drawings incorporated into the specification and forming a part thereof, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application.

[0027] Figure 1 A front view of the bounce-preventing device provided by the embodiments of the application;

[0028] Figure 2 A partial enlarged view of A in Figure 1

[0029] Figure 3 A sectional view of the bounce-preventing device provided by the embodiments of the application and perpendicular to the axial direction of the locking sleeve;

[0030] Figure 4 A top view of the bounce-preventing device and part of the transmission mechanism provided by the embodiments of the application.

[0031] Reference signs:

[0032] 1-bounce-preventing device;

[0033] 10-position-adjusting shaft bolt;

[0034] 110-locking portion; 120-elongated member; 130-mounting portion; 131-first mounting portion; 132-second mounting portion;

[0035] 20-locking sleeve;

[0036] 210-mounting groove; 220-fixing member; 230-elastic member; 240-adjusting member; 250-connecting portion; 260-arc-shaped curved surface;

[0037] ​30 - base; 310 - longitudinal adjustment screw; 320 - radial adjustment screw;

[0038] 40 - hand wheel;

[0039] 50 - drive shaft;

[0040] 60 - incomplete gear rack structure;

[0041] 70 - latch.

[0042] The specific embodiments of the application will now be described in detail with reference to the following figures. The following description, with reference to the figures, is not meant to limit the scope of the application in any way but is merely meant to illustrate the application to a person skilled in the art with reference to particular embodiments. DETAILED DESCRIPTION

[0043] The exemplary embodiments will be described in detail with reference to the accompanying drawings. The following description is made with reference to the accompanying drawings in which like numerals represent like elements, unless the context dictates otherwise. The following description of exemplary embodiments is not representative of all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the appended claims.

[0044] The technical solutions of the present application and how the technical solutions of the present application solve the above technical problems will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes can not be described again in some embodiments. The embodiments of the present application will be described below with reference to the accompanying drawings.

[0045] In the related art, the containment vessel in a nuclear power plant can separate the reactor from the external environment to prevent radioactive substances from spreading to the external environment through air, water or other means. The gate is the access passage for operating and maintenance personnel to enter and exit the safety cabin of the containment vessel. Some tools and small equipment can be transported through the gate.

[0046] The gate mainly consists of a door body, a latch and a transmission mechanism. The door body is driven to close by the transmission mechanism, and after the door body is closed, the transmission mechanism continues to operate to drive the latch to be buckled. In order to ensure the safety and airtightness of the containment vessel, the door body is relatively thick and heavy. When the door body is closed and contacts the cabin panel, a large amount of kinetic energy will be generated, which will be converted into impact force in an instant, and the impact force will cause the door body to rebound. This rebound can cause the transmission mechanism to be unable to maintain continuous operation, thereby affecting the buckling of the latch and the reliability of the gate.

[0047] In view of this, the anti-rebound device and the gate provided by the embodiments of the present application are provided. The gate comprises a door body, a door bolt, an anti-rebound device and a transmission mechanism. The transmission mechanism can drive the door body to close, and the transmission mechanism can further drive the door bolt to close. The anti-rebound device comprises a position adjusting shaft bolt and a locking sleeve which are matched with each other. One of the position adjusting shaft bolt and the locking sleeve is used to be installed on the door body, and the other of the position adjusting shaft bolt and the locking sleeve is used to be installed on the hatch cover panel. The locking sleeve is provided with a mounting groove, and a movable fixing member is arranged in the mounting groove. The position adjusting shaft bolt is movably arranged in the mounting groove, and the position adjusting shaft bolt is provided with a locking portion. When the position adjusting shaft bolt is located in the mounting groove, the locking portion is connected with the fixing member. An acting force can be generated between the locking portion and the fixing member, and the acting force is greater than an impact force when the door body is closed, so that the position adjusting shaft bolt and the locking sleeve are in a locked state, and the door body is in a locked state, thereby preventing the door body from rebounding. In this way, the continuous operation of the transmission mechanism can be ensured, the door bolt can be smoothly closed, and the reliability of the gate can be improved.

[0048] The gate and the anti-rebound device will be described in detail below.

[0049] The embodiments of the present application provide a gate, which comprises a door body, a door bolt, an anti-rebound device and a transmission mechanism. The transmission mechanism can drive the door body to open and close, and the transmission mechanism can further drive the door bolt to close and open. The anti-rebound device can prevent the door body from rebounding through a locking mechanism, and ensure that the door body remains stable after being closed. The anti-rebound device can prevent the door body from rebounding to affect the continuous operation of the transmission mechanism, thereby affecting the closing of the door bolt and the reliability of the gate.

[0050] Referring to Figure 1 The anti-rebound device 1 comprises a position adjusting shaft bolt 10 and a locking sleeve 20 which are matched with each other. The position adjusting shaft bolt 10 and the locking sleeve 20 are matched with each other to form a locked state, thereby preventing the door body from rebounding.

[0051] Further, the position adjusting shaft bolt 10 can be installed on the door body, and the locking sleeve 20 can be installed on the hatch cover panel. For example, the position adjusting shaft bolt 10 can be installed on a base, and the base is installed on the door body, so as to adjust the position of the position adjusting shaft bolt 10 and match the position adjusting shaft bolt 10 with the locking sleeve 20. The locking sleeve 20 can be welded on the hatch cover panel through a connecting plate. In this way, the locking sleeve 20 can be replaced, and the locking sleeve 20 is fixed firmly and reliably.

[0052] In some embodiments, the locking sleeve 20 is used to be installed on the door body, and the position adjusting shaft bolt 10 is used to be installed on the hatch cover panel. In this way, the applicability of the anti-rebound device 1 can be improved.

[0053] Referring to Figure 2As shown, the locking sleeve 20 is provided with a mounting groove 210, which can be provided in a shape matching the outer surface of the positioning shaft bolt 10. For example, the mounting groove 210 can be provided as a circular cavity to reduce the processing difficulty of the locking sleeve 20.

[0054] In combination Figure 2 and Figure 3 As shown, the mounting groove 210 is provided with a movable fixing member 220, which cooperates with the positioning shaft bolt 10 to prevent the door body from rebounding. For example, the fixing member 220 can be provided as a steel ball, which is commonly used to reduce the cost of the anti-rebound device 1. For another example, the fixing member 220 can be provided as an elastic protrusion, which is relatively firm and can improve the reliability of the anti-rebound device 1.

[0055] The positioning shaft bolt 10 is movably arranged in the mounting groove 210. That is, the positioning shaft bolt 10 can be mounted in the mounting groove 210 or detached from the mounting groove 210. The positioning shaft bolt 10 is provided with a locking portion 110, which can be connected with the fixing member 220 to make the positioning shaft bolt 10 and the locking sleeve 20 in a locked state.

[0056] For example, the locking portion 110 can be provided as a groove, and the fixing member 220 can be provided as an elastic protrusion. The positioning shaft bolt 10 and the locking sleeve 20 are in a locked state by the locking portion 110 and the fixing member 220 to prevent the door body from rebounding.

[0057] The anti-rebound device 1 includes the positioning shaft bolt 10 and the locking sleeve 20. The positioning shaft bolt 10 is provided with the locking portion 110, and the locking sleeve 20 is provided with the movable fixing member 220. When the positioning shaft bolt 10 is located in the mounting groove 210 of the locking sleeve 20, the locking portion 110 can be connected with the fixing member 220. An acting force can be generated between the locking portion 110 and the fixing member 220, which is greater than the impact force when the door body is closed, so that the positioning shaft bolt 10 and the locking sleeve 20 are in a locked state, thereby making the door body in a locked state and preventing the door body from rebounding. This can ensure the continuous operation of the transmission mechanism and make the door bolt smoothly engaged, thereby improving the reliability of the gate.

[0058] The structure of the anti-rebound device 1 will be described in detail below.

[0059] In combination Figure 2 and Figure 3 As shown, the positioning shaft bolt 10 of the anti-rebound device 1 is provided with an extension member 120, which is used to be arranged in the base 30 of the door body. This can make the positioning shaft bolt 10 and the base 30 of the door body have a certain connection strength. When a large impact force is generated when the door body is closed, the positioning shaft bolt 10 connected with the base 30 of the door body will not be loose, thereby improving the reliability of the anti-rebound device 1.

[0060] The extension 120 is provided with a mounting portion 130, and the extension 120 can be mounted on the base 30 through the mounting portion 130. In this way, loosening of the positioning shaft bolt 10 can be prevented.

[0061] For example, the base 30 of the door body is provided with a threaded hole, the extension 120 is provided as a threaded cylinder, and the mounting portion 130 is provided as a nut. By inserting the extension 120 into the mounting hole and cooperating the mounting portion 130 with the extension 120, the positioning shaft bolt 10 is fixed on the base 30, the stability of the positioning shaft bolt 10 is improved, and thus the stability of the anti-rebound device 1 is improved. In this way, the positioning shaft bolt 10 is convenient to replace and maintain, and thus the maintainability of the anti-rebound device 1 is improved.

[0062] The number of mounting portions 130 is multiple. The multiple mounting portions 130 are fixed at different positions of the extension 120, stress can be dispersed, and the fixing strength of the positioning shaft bolt 10 is improved.

[0063] The multiple mounting portions 130 include a first mounting portion 131 and a second mounting portion 132. The first mounting portion 131 is used to at least abut against a first surface of the door body, and the second mounting portion 132 is used to at least abut against a second surface of the door body. By making the first mounting portion 131 and the second mounting portion 132 contact different surfaces of the door body respectively, the positioning shaft bolt 10 can be fixed on the base 30 of the door body in two directions, so as to ensure that the positioning shaft bolt 10 can remain stable during use and prevent the positioning shaft bolt 10 from loosening or shifting.

[0064] The first mounting portion 131 and the second mounting portion 132 are movably arranged on the extension 120. In this way, the extension 120 can be removed, and the maintainability of the positioning shaft bolt 10 is improved. By loosening the first mounting portion 131 and the second mounting portion 132, the position of the positioning shaft bolt 10 along the axial direction of the positioning shaft bolt 10 can be adjusted, the relative position between the positioning shaft bolt 10 and the locking sleeve 20 is changed, the needs of different door bodies are met, and the applicability of the anti-rebound device 1 is improved.

[0065] The first mounting portion 131 and the second mounting portion 132 can be provided as nuts, so that the stability of the positioning shaft bolt 10 on the base 30 of the door body can be improved through threaded connection. The first mounting portion 131 and the second mounting portion 132 can also be fixed on the extension 120 by setting a locking screw, and the stability of the positioning shaft bolt 10 on the base 30 of the door body is further improved.

[0066] The locking portion 110 on the positioning shaft bolt 10 can be provided as a locking groove, and the locking groove is arranged on the outer surface of the positioning shaft bolt 10 along the circumferential direction of the positioning shaft bolt 10. The locking groove allows the fixing member 220 to be embedded in the locking groove and the locking groove to be in circumferential contact with the fixing member 220, and the stability and reliability of the connection between the positioning shaft bolt 10 and the fixing member 220 can be improved.

[0067] Specifically, the locking groove can be set as a circular-arc-shaped recess, which can be processed by a machine tool or the like, so as to reduce the processing difficulty of the positioning shaft bolt 10. In addition, the circular-arc-shaped recess has a relatively smooth curved surface, so as to avoid stress concentration when being connected with the fixing member 220, and prevent the locking groove from being broken.

[0068] The first end of the positioning shaft bolt 10 first contacts the locking groove. When the door body is closed, the first end of the positioning shaft bolt 10 is first inserted into the mounting groove 210. Therefore, an arc-shaped curved surface 260 is processed between the first end of the positioning shaft bolt 10 and the locking groove, which can play a guiding role. With the first end of the positioning shaft bolt 10 being inserted into the mounting groove 210, the arc-shaped curved surface 260 contacts and slides along the fixing member 220, so as to push the fixing member 220 to move away from the inner wall of the mounting groove 210. In this way, the collision between the positioning shaft bolt 10 and the fixing member 220 can be prevented, so as to prevent the fixing member 220 or the positioning shaft bolt 10 from being broken.

[0069] In some embodiments, the base 30 is fixed on the door body by a bolt fastener. In order to facilitate the insertion of the positioning shaft bolt 10 into the mounting groove 210, a longitudinal positioning screw 310 is arranged on the base 30. The longitudinal positioning screw 310 is arranged through the base 30 and abuts against the door body, and is fixed on the base 30 by a nut. By adjusting the position of the longitudinal positioning screw 310 along the height direction of the door body, the position of the base 30 relative to the door body is adjusted, and the position of the base 30 is changed, so as to realize the adjustment of the position of the positioning shaft bolt 10 in the height direction.

[0070] Referring to Figure 4 In some embodiments, the base 30 is fixed on the door body by a bolt fastener. In order to facilitate the insertion of the positioning shaft bolt 10 into the mounting groove 210, a radial positioning screw 320 is arranged on the base 30. The radial positioning screw 320 is perpendicular to the axial direction of the positioning shaft bolt 10 and perpendicular to the height direction of the positioning shaft bolt 10. For example, a through hole is arranged on the base 30, and the extension member 120 is arranged through the base 30, and the through hole is slightly larger than the extension member 120. The radial positioning screw 320 passes through the threaded hole of the base 30 and abuts against the positioning shaft bolt 10. By adjusting the screwing depth of the radial positioning screw 320, the adjustment of the position of the positioning shaft bolt 10 in the longitude direction is realized.

[0071] Continuing to refer to Figure 2 and Figure 3 As described above, the locking sleeve 20 of the anti-rebound device 1 is provided with a movable fixing member 220. The fixing member 220 can move along the inner wall of the mounting groove 210 of the locking sleeve 20 away from or close to the locking sleeve 20. That is, the fixing member 220 can reciprocate along the radial direction of the locking sleeve 20.

[0072] When the fixing member 220 is close to the inner wall of the mounting groove 210, the fixing member 220 is disengaged from the locking groove. At this time, the positioning shaft bolt 10 is not in contact with the fixing member 220, and the positioning shaft bolt 10 is not in contact with the locking sleeve 20, so that the door body can be opened and closed.

[0073] When the fixing member 220 is away from the inner wall of the mounting groove 210, the fixing member 220 is located in the locking groove, and the fixing member 220 is embedded in the locking groove. When the door body is closed, the contact surface of the fixing member 220 and the locking groove can generate a force, so that the positioning shaft bolt 10 and the locking sleeve 20 are fixed. In this way, the rebound of the door body can be prevented, and the reliability of the gate is improved.

[0074] Further, the number of the fixing member 220 can be set to be multiple, and the contact area of the multiple fixing members 220 and the locking groove is larger, so that the connection between the positioning shaft bolt 10 and the locking sleeve 20 is more reliable, and the stability and reliability of the anti-rebound device 1 of the gate are enhanced. In addition, the multiple fixing members 220 can allow the wear or failure of individual fixing members 220, so as not to affect the use of the anti-rebound device 1.

[0075] The multiple fixing members 220 can be sequentially and spacedly arranged. When the door body is closed, this can ensure that the anti-rebound device 1 can evenly disperse stress when subjected to impact force, and further improve the anti-rebound effect.

[0076] Specifically, the number of the fixing member 220 can be set to four, and the four fixing members 220 are arranged at intervals. The size of the force generated by the four fixing members 220 and the locking groove is appropriate. The force can prevent the door body from rebounding when the door body is closed, and can also drive the locking groove to disengage from the fixing member 220 when the door body is opened.

[0077] In some embodiments, the fixing member 220 can move along the inner wall close to or away from the mounting groove 210, and the locking sleeve 20 is provided with an elastic member 230, and the elastic force generated by the deformation of the elastic member 230 is used to drive the movement of the fixing member 220. For example, the elastic member 230 can be set as a spring.

[0078] The first end of the elastic member 230 is connected with the locking sleeve 20, and the second end of the elastic member 230 is connected with the fixing member 220. The second end of the elastic member 230 can be extended or retracted in the direction close to or away from the locking sleeve 20. During the closing of the door body, the positioning shaft bolt 10 is gradually inserted into the installation groove 210 of the locking sleeve 20, and one end of the positioning shaft bolt 10 first contacts the fixing member 220, the elastic member 230 is compressed through the fixing member 220, and the second end of the elastic member 230 is away from the locking sleeve 20. After the positioning shaft bolt 10 is inserted into the installation groove 210 of the locking sleeve 20, the elastic member 230 generates an elastic force to restore the original state after being compressed. The second end of the elastic member 230 drives the fixing member 220 to move in the direction close to the locking sleeve 20, so that the fixing member 220 is embedded in the installation groove 210. By arranging the elastic member 230, the fixing member 220 can be moved, the structure of the anti-rebound device 1 is relatively simple, and the use requirement can be met. For example, the first end of the elastic member 230 is installed on the locking sleeve 20 through the installation cylinder, and the first end of the elastic member 230 is connected with the locking sleeve 20 to provide a fixed point.

[0079] The locking sleeve 20 is provided with an adjusting member 240. The adjusting member 240 can adjust the radial position of the fixing member 220 along the locking sleeve 20, so that the connection of the fixing member 220 with the locking groove is more stable.

[0080] The adjusting member 240 is arranged in the locking sleeve 20, the adjusting member 240 is connected with the fixing member 220, and the adjusting member 240 can move in the direction close to or away from the center of the installation groove 210. The movement of the adjusting member 240 drives the movement of the fixing member 220, so that the radial position of the fixing member 220 along the locking sleeve 20 is changed. Different types of door bodies generate different impact forces when being closed, the position of the fixing member 220 is adjusted through the adjusting member 240, so that the connection of the fixing member 220 with the locking groove is more stable, and the rebound of the door body is prevented. In this way, the applicability of the anti-rebound device 1 can be improved.

[0081] For example, the adjusting member 240 can be a hollow screw. The locking sleeve 20 is provided with a threaded hole, the hollow screw is screwed into the threaded hole, and the position of the fixing member 220 is adjusted by adjusting the screwing depth. In this way, the use requirement can be met and the structure is simple.

[0082] The first end of the adjusting member 240 is located in the installation groove 210, the fixing member 220 is close to the first end of the adjusting member 240, and the second end of the adjusting member 240 is located outside the installation groove 210. In this way, the adjusting member 240 can be adjusted without disassembling the anti-rebound device 1, and the maintainability and operation convenience of the anti-rebound device 1 are improved.

[0083] The second end of the adjusting member 240 is provided with a connecting part 250, and the adjusting member 240 is fixed with the locking sleeve 20 through the connecting part 250. By fixing the adjusting member 240 through the connecting part 250, the impact force generated when the door body is closed can be avoided to cause the adjusting member 240 to be loose, so that the fixing member 220 cannot be connected with the locking groove.

[0084] For example, the connecting part 250 can be a nut, and the adjusting member 240 can be a hollow screw rod. The hollow screw rod is installed on the locking sleeve 20 through external thread cooperation, and the nut is abutted with the locking sleeve 20 through external thread cooperation with the hollow screw rod, so as to fix the adjusting member 240 on the locking sleeve 20. The connecting part 250 can improve the reliability of the fixing of the adjusting member 240.

[0085] Referring to Figure 4 As shown in the figure, the transmission mechanism of the gate includes a hand wheel 40, a driving shaft 50, an incomplete gear structure (not shown in the figure), and an incomplete gear rack structure 60. First, the hand wheel 40 is rotated, and the hand wheel 40 drives the driving shaft 50 to rotate. The incomplete gear structure on the driving shaft 50 is engaged through the gear teeth, and outputs the torque to the door body, so as to drive the door body to close. As the door body is closed, the adjusting shaft bolt 10 on the door body is inserted into the locking sleeve 20 on the deck plate. After the door body is closed, the adjusting shaft bolt 10 is completely inserted into the installation groove 210 of the locking sleeve 20. At this time, the locking groove is connected with the fixing member 220, and the action force between the locking groove and the fixing member 220 is greater than the impact force when the door body is closed, so that the door body is in a locked state, and the door body is prevented from rebounding. As the driving shaft 50 continues to rotate, the incomplete gear on the driving shaft 50 is at the locking arc position, and the door body is not in action. The incomplete gear rack structure 60 on the driving shaft 50 drives the rack to move, and the rack drives the latch 70 to be buckled, so as to complete the closing process of the gate.

[0086] When the door body is opened, the driving shaft 50 is reversely rotated, the gear teeth of the incomplete gear structure are engaged, and the door body is opened. As the door body is opened, the door body drives the adjusting shaft bolt 10 to move, and the axial force applied to the adjusting shaft bolt 10 is greater than the axial action force generated between the locking groove and the fixing member 220. The elastic member 230 is compressed, the fixing member 220 is separated from the locking groove, and the adjusting shaft bolt 10 is separated from the locking sleeve 20.

[0087] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms “center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer” and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0088] In the description of the application, it should be understood that the terms "including" and "having" and any change thereof used herein are intended to cover the inclusions not exclusively, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0089] Unless otherwise clearly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or can be integrated; can be directly connected, or can be indirectly connected through an intermediate medium; can be connected inside two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated.

[0090] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A kickback prevention device characterized by comprising: The adjusting shaft bolt (10) and the locking sleeve (20) are matched with each other. One of the adjusting shaft bolt (10) and the locking sleeve (20) is arranged on the door body, and the other is arranged on the hatch cover. The locking sleeve (20) is provided with a mounting groove (210), and a movable fixing part (220) is arranged in the mounting groove (210). The adjusting shaft bolt (10) is movably arranged in the mounting groove (210), and the adjusting shaft bolt (10) is provided with a locking part (110), and when the adjusting shaft bolt (10) is located in the mounting groove (210), the locking part (110) is connected with the fixing part (220).

2. The anti-rebound device of claim 1, wherein The locking part (110) is arranged as a locking groove, which is arranged on the outer surface of the adjusting shaft bolt (10) along the circumferential direction of the adjusting shaft bolt (10).

3. The anti-rebound device of claim 2, wherein, The fixing part (220) can move towards or away from the inner wall of the mounting groove (210). When the fixing part (220) is close to the inner wall of the mounting groove (210), the fixing part (220) is separated from the locking groove. When the fixing part (220) is away from the inner wall of the mounting groove (210), the fixing part (220) is located in the locking groove, and the adjusting shaft bolt (10) is fixed with the locking sleeve (20).

4. The anti-rebound device of claim 3, wherein The number of the fixing part (220) is multiple, and the fixing parts (220) are arranged in sequence and at intervals.

5. The anti-rebound device of claim 1, wherein The locking sleeve (20) is provided with an elastic part (230), and a first end of the elastic part (230) is connected with the locking sleeve (20). A second end of the elastic part (230) can be stretched and contracted in the direction of approaching or moving away from the locking sleeve (20), and the second end of the elastic part (230) is connected with the fixing part (220).

6. A back lash prevention device according to any one of claims 1-5, characterized in that The locking sleeve (20) is provided with an adjusting part (240), and the adjusting part (240) is arranged in the locking sleeve (20). The adjusting part (240) is connected with the fixing part (220), and the adjusting part (240) can move in the direction of approaching or moving away from the center of the mounting groove (210).

7. The anti-rebound device of claim 6, wherein A first end of the adjusting part (240) is located in the mounting groove (210), and a second end of the adjusting part (240) is located outside the mounting groove (210). The second end of the adjusting part (240) is provided with a connecting part (250), and the adjusting part (240) is fixed with the locking sleeve (20) through the connecting part (250).

8. The anti-rebound device of any one of claims 1-5, wherein, The adjusting shaft bolt (10) is provided with an extension part (120), and the extension part (120) is arranged in the base of the door body. The extension part (120) is provided with a mounting part (130), and the extension part (120) can be mounted on the base through the mounting part (130).

9. The anti-rebound device of claim 8, wherein, The number of the mounting part (130) is multiple, and the multiple mounting parts (130) include a first mounting part (131) and a second mounting part (132). The first mounting portion (131) and the second mounting portion (132) are movably arranged on the extension member (120), the first mounting portion (131) is arranged to abut against a first surface of the door body, and the second mounting portion (132) is arranged to abut against a second surface of the door body.

10. A gate characterized by, The anti-rebound device according to any one of claims 1-9.

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