A speed lock elastic self-recovery structure

Abstract

The present application relates to an elastic self-restoring structure of a speed lock, comprising: a speed lock, the speed lock comprising a lock cylinder, and a piston rod located in the lock cylinder and coaxially arranged with the lock cylinder, a piston fixedly arranged on the piston rod and slidably connected with the lock cylinder; a self-restoring mechanism, the self-restoring mechanism comprising an elastic cylinder located at one end of the lock cylinder, one end of the piston rod extending into the elastic cylinder, an elastic member for pushing and pulling the piston rod to restore the piston to its original position is arranged in the elastic cylinder. In the present application, when the length dimension of the speed lock is changed by an external impact load, the piston rod of the speed lock will drive the elastic member in the elastic cylinder to compress, and the elastic member provides the speed lock with an elastic restoring force in the opposite direction of the external load, prompting the speed lock to restore the initial length. The present application has good performance in use and economic performance, can better meet the actual requirements of various projects, and has broad market prospects.

Description

Technical Field

[0001] The present application relates to the technical field of bridge anti-seismic lockers, and in particular to an elastic self-recovering structure of a speed locker. Background Art

[0002] Earthquakes are one of the most serious natural disasters faced by human society. The destruction or collapse of bridges in earthquakes will not only cause serious direct losses, but also trigger huge secondary disasters. my country is a country prone to strong earthquakes, with high frequency, high intensity and wide distribution. The Wenchuan earthquake is the most destructive earthquake since the founding of New China, which has prompted my country to accelerate the in-depth research on the seismic design of bridge structures.

[0003] Since 2008, my country has successively promulgated and implemented a number of standards on seismic design of bridge structures, including "Detailed Rules for Seismic Design of Highway Bridges" (JTG / T B02-01-2008), "Code for Seismic Design of Urban Bridges" (CJJ 166-2011), "Seismic Code for Highway Engineering" (JTG B02-2013), and "Code for Seismic Design of Urban Rail Transit Structures" (GB 50909-2014).

[0004] The damage or collapse of bridge structures and the subsequent traffic disruptions have attracted the attention of society and the public. Therefore, how to establish a safe, economical and reliable earthquake-resistant design that can effectively withstand a certain degree of unpredictable catastrophic earthquake has always been a continuous challenge facing bridge engineering earthquake resistance.

[0005] The speed locker is a speed (acceleration) related locking device. Under normal use of the bridge, the longitudinal displacement speed of the bridge caused by temperature difference and creep is small. At this time, the speed locker does not work, and the movable bearing can provide the required displacement. When the bridge movement speed is greater than the design value of the speed locker (such as an earthquake), the speed locker is immediately locked, and the original movable bearing instantly becomes a fixed bearing, so that the bridge structure changes from a fixed pier under normal use to multiple fixed piers, distributing the seismic force to multiple piers, making the bridge structure more evenly stressed, and playing the role of joint thrust resistance and joint earthquake resistance of each pier.

[0006] However, the current products do not have an automatic resetting device for the lock. After the lock is locked, the locking force continues to exist, and the lock can only gradually restore its initial length under the drive of the external structural load. The internal high pressure lasts for a long time, affecting the service life, and provides rigidity to the bridge structure for a long time, and it cannot recover to its original state by itself. Summary of the invention

[0007] The embodiment of the present application provides an elastic self-recovering structure of a speed lock to solve the problem in the related art that after the lock is locked, the locking force continues to exist, the lock can only gradually restore the initial length under the drive of the external structural load, and the internal high pressure lasts for a long time, affecting the service life.

[0008] The embodiment of the present application provides a speed lock elastic self-recovery structure, including:

[0009] A speed locker, the speed locker comprising a locker cylinder, and a piston rod located in the locker cylinder and coaxially arranged with the locker cylinder, wherein a piston is fixedly arranged on the piston rod and is slidably connected with the locker cylinder;

[0010] The self-restoring mechanism comprises an elastic cylinder located at one end of the locking cylinder, one end of the piston rod extends into the elastic cylinder, and an elastic member is arranged in the elastic cylinder for pushing and pulling the piston rod to restore the piston to its original position.

[0011] In some embodiments: a first fixed baffle and a second fixed baffle arranged at intervals are fixedly disposed in the cylinder of the elastic member, and the elastic member is positioned between the first fixed baffle and the second fixed baffle;

[0012] The piston rod is fixedly provided with a first movable baffle and a second movable baffle which are spaced apart from each other. The elastic member is sleeved on the piston rod and is located between the first movable baffle and the second movable baffle.

[0013] In some embodiments: the elastic member is a helical compression spring sleeved on the piston rod and coaxially connected to the piston rod.

[0014] In some embodiments: the elastic member is a plurality of mutually stacked disc springs which are sleeved on the piston rod and coaxially connected to the piston rod.

[0015] In some embodiments: the piston rod is movably connected to a first movable pressure equalizing plate and a second movable pressure equalizing plate which are spaced apart from each other, and the elastic member is located between the first movable pressure equalizing plate and the second movable pressure equalizing plate;

[0016] The first fixed baffle and / or the first movable baffle are in contact with the first movable pressure equalizing plate;

[0017] The second fixed baffle and / or the second movable baffle is in contact with the second movable pressure equalizing plate.

[0018] In some embodiments: the first fixed baffle is a circular steel plate and is located at one end close to the speed locker, the second fixed baffle is a circular sleeve and is located at one end away from the speed locker, and the second fixed baffle is threadedly connected to the elastic member cylinder body.

[0019] In some embodiments: the outer diameter of the first movable baffle is smaller than the inner diameter of the first fixed baffle, and the first movable baffle is coaxially arranged with the first fixed baffle;

[0020] The outer diameter of the second movable baffle is smaller than the inner diameter of the second fixed baffle, and the second movable baffle is coaxially arranged with the second fixed baffle.

[0021] In some embodiments: the end of the piston rod extending into the cylinder of the elastic member is provided with an external thread connecting the first movable baffle plate and the second movable baffle plate, and the first movable baffle plate and the second movable baffle plate are both fixedly connected to the piston rod thread.

[0022] In some embodiments: the two ends of the lock cylinder are respectively provided with a lock front end cover and a lock rear end cover for closing the lock cylinder;

[0023] The two ends of the elastic cylinder are respectively provided with a front connection end cover and a rear connection end cover that close the elastic cylinder, and the rear end cover of the lock is fixedly connected to the front connection end cover;

[0024] The piston rod passes through the front connection end cover, the lock rear end cover and the lock front end cover, and is slidably and sealingly connected with the lock rear end cover and the lock front end cover.

[0025] In some embodiments: a first hinged joint is fixedly disposed at one end of the piston rod away from the self-restoring mechanism, and the first hinged joint is rotatably connected to a tower end connecting support via an axle pin;

[0026] A second hinged joint is fixedly provided on the rear connecting end cover, and the second hinged joint is rotatably connected to the beam end connecting support through an axle pin.

[0027] The beneficial effects of the technical solution provided by this application include:

[0028] An embodiment of the present application provides an elastic self-recovery structure of a speed lock. Since the elastic self-recovery structure of the speed lock of the present application is provided with a speed lock, the speed lock includes a lock cylinder, and a piston rod located in the lock cylinder and coaxially arranged with the lock cylinder, and a piston is fixedly arranged on the piston rod and is slidably connected to the lock cylinder; a self-recovery mechanism, which includes an elastic part cylinder located at one end of the lock cylinder, one end of the piston rod extends into the elastic part cylinder, and an elastic part is provided in the elastic part cylinder for pushing and pulling the piston rod to restore the piston to its original position.

[0029] Therefore, the elastic self-restoring structure of the speed lock of the present application does not provide elastic force to the speed lock when it is not subjected to external impact; when the length of the speed lock changes due to external impact load, the piston rod of the speed lock will drive the elastic part in the elastic part cylinder to compress, and the elastic part provides the speed lock with elastic restoring force in the opposite direction of the external load, prompting the speed lock to restore its initial length. The elastic self-restoring structure of the speed lock of the present application has good performance and economic performance, can better meet the actual requirements of various projects, and has broad market prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 This is a schematic diagram of the structure of an embodiment of the present application;

[0032] Figure 2 This is a schematic diagram of the structure of the self-restoring mechanism of an embodiment of the present application;

[0033] Figure 3 This is a schematic diagram of the usage status of an embodiment of the present application.

[0034] Reference numerals:

[0035] 1. Tower end connecting support; 2. Beam end connecting support; 3. First hinged joint; 4. Piston rod; 5. Lock front end cover; 6. Lock cylinder; 7. Piston; 8. Lock rear end cover; 9. Self-restoring mechanism; 10. Second hinged joint; 11. Pier; 12. Main beam; 91. Front connecting end cover; 92. Elastic member cylinder; 93. First fixed baffle; 94. Second fixed baffle; 95. Elastic member; 96. First movable baffle; 97. Second movable baffle; 98. First movable equalizing plate; 99. Second movable equalizing plate. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0037] The embodiment of the present application provides an elastic self-recovering structure of a speed lock, which can solve the problem in the related art that after the lock is locked, the locking force continues to exist, the lock can only gradually restore the initial length under the drive of the external structural load, and the internal high pressure lasts for a long time, affecting the service life.

[0038] See also Figure 1 and Figure 2 As shown, the embodiment of the present application provides a speed lock elastic self-recovery structure, including:

[0039] A speed locker includes a lock cylinder 6 and a piston rod 4 located in the lock cylinder 6 and coaxially arranged with the lock cylinder 6. A piston 7 is fixedly arranged on the piston rod 4 and is slidably connected to the lock cylinder 6. A locking structure is installed inside the piston 7. When the speed of the piston 7 reaches a predetermined value, the locking structure is activated, and the piston 7 blocks the flow of damping medium in the lock cylinder 6, thereby achieving locking.

[0040] The speed lock does not work when the bridge structure only undergoes thermal expansion and contraction or creep and shrinkage of concrete. The piston 7 can move freely in the lock cylinder 6, with almost no restraint on the bridge structure. When the bridge structure is subjected to sudden vibration loads, the piston 7 in the speed lock is activated, and the speed lock becomes almost a rigid connection device to suppress the vibration of the bridge structure.

[0041] The self-restoring mechanism 9 includes an elastic member cylinder 92 located at one end of the locker cylinder 6, one end of the piston rod 4 extends into the elastic member cylinder 92, and an elastic member 95 for pushing and pulling the piston rod 4 to restore the piston 7 to its original position is provided in the elastic member cylinder 92. The elastic member 95 is located in the locker cylinder 6 and is connected to the push-pull piston rod 4. When the speed locker is subjected to an external impact load, the impact load is transmitted to the elastic member 95, and the elastic member 95 is compressed and deformed to store energy, so as to push and pull the piston rod 4 to restore the piston 7 to its original position.

[0042] When the elastic self-recovery structure of the speed lock in the embodiment of the present application is not subjected to external impact, the self-recovery mechanism 9 does not provide elastic force to the speed lock; when the speed lock is subjected to an external impact load and the length dimension changes, the piston rod 4 of the speed lock will drive the elastic part 95 in the elastic part cylinder 92 to compress, and the elastic part 95 provides the speed lock with an elastic recovery force in the opposite direction to the external load, so that the speed lock recovers its initial length.

[0043] In some optional embodiments: See Figure 2As shown, the embodiment of the present application provides a speed lock elastic self-restoring structure, in which a first fixed baffle 93 and a second fixed baffle 94 are fixedly provided in an elastic member cylinder 92 of the speed lock elastic self-restoring structure, and an elastic member 95 is positioned between the first fixed baffle 93 and the second fixed baffle 94. The first fixed baffle 93 and the second fixed baffle 94 are used to limit the axial position of the elastic member 95 in the elastic member cylinder 92.

[0044] A first movable baffle 96 and a second movable baffle 97 are fixedly provided at intervals on the piston rod 4, and the elastic member 95 is sleeved on the piston rod 4 and is located between the first movable baffle 96 and the second movable baffle 97. The first movable baffle 96 and the second movable baffle 97 are used to limit the axial position of the elastic member 95 on the piston rod 4. When the piston rod 4 reciprocates axially in the elastic member cylinder 92, the first movable baffle 96 and the second movable baffle 97 are used to push and pull the elastic member 95 so that the elastic member 95 is compressed to store energy.

[0045] See also Figure 1 and Figure 2 As shown, when the speed locker is subjected to an external impact load and pushes the piston rod 4 to move to the right, the right end of the elastic member 95 fits against the second fixed baffle 94, and the second movable baffle 97 is disengaged from the right end of the elastic member 95; the left end of the elastic member 95 is disengaged from the first fixed baffle 93, and the first movable baffle 96 is fitted against the left end of the elastic member 95 to push the elastic member 95 to be compressed toward the right direction.

[0046] When the speed locker is subjected to an external impact load and pushes the piston rod 4 to move to the left, the right end of the elastic member 95 disengages from the second fixed baffle 94, and the second movable baffle 97 fits against the right end of the elastic member 95; the left end of the elastic member 95 fits against the first fixed baffle 93, and the first movable baffle 96 disengages from the left end of the elastic member 95, so as to push the elastic member 95 to be compressed toward the left direction.

[0047] In some optional embodiments: See Figure 2 As shown, the embodiment of the present application provides a speed lock elastic self-restoring structure, and the elastic member 95 of the speed lock elastic self-restoring structure is a helical compression spring sleeved on the piston rod 4 and coaxially connected to the piston rod 4. In addition to the helical compression spring, skilled technicians can also use gas springs, rubber springs, etc. The outer diameter, inner diameter, length, stiffness coefficient and spring wire diameter of the helical compression spring of the embodiment of the present application can be specifically set by those skilled in the art according to actual needs to meet the requirements of pushing and pulling the piston rod 4 to restore the piston 7 to its original position.

[0048] In some optional embodiments: See Figure 2As shown, the embodiment of the present application provides an elastic self-restoring structure of a speed locker, wherein the elastic member 95 of the elastic self-restoring structure of the speed locker is a plurality of disc springs stacked on each other and sleeved on the piston rod 4 and coaxially connected to the piston rod 4. The disc spring is in the shape of a conical disk, and can be used alone or in series or in parallel. The disc spring bears static or dynamic loads acting in the axial direction at the upper inner edge and the lower outer edge, and is deformed after being compressed until it is flattened, and acts as a live load in the form of stored energy.

[0049] The elastic member 95 of the embodiment of the present application adopts the same disc spring in different combinations, which can change the spring characteristics in a wide range. It can adopt a combination of matching and overlapping, or a combination of different thicknesses and different numbers of sheets, so as to push and pull the piston rod 4 to restore the piston 7 to its original position. The self-restoring mechanism 9 of the embodiment of the present application cooperates with the speed locker to achieve a damping effect when the speed locker is working normally, and can restore the speed locker to its original state when the speed locker is locked.

[0050] In some optional embodiments: See Figure 2 As shown, the embodiment of the present application provides a speed lock elastic self-restoring structure, the piston rod 4 of the speed lock elastic self-restoring structure is movably connected with a first movable pressure equalizing plate 98 and a second movable pressure equalizing plate 99 arranged at intervals, and the elastic member 95 is located between the first movable pressure equalizing plate 98 and the second movable pressure equalizing plate 99. The first fixed baffle 93 and / or the first movable baffle 96 are in contact with the first movable pressure equalizing plate 98; the second fixed baffle 94 and / or the second movable baffle 97 are in contact with the second movable pressure equalizing plate 99.

[0051] When the speed locker is subjected to an external impact load and pushes the piston rod 4 to move to the right, the first movable baffle 96 and the first movable pressure equalizing plate 98 fit together and push the elastic member 95 to be compressed to the right, and the right end of the elastic member 95 pushes the second movable pressure equalizing plate 99 and the second fixed baffle 94 to fit together; the first movable pressure equalizing plate 98 and the first fixed baffle 93 disengage from each other, and the second movable baffle 97 and the second movable pressure equalizing plate 99 disengage from each other.

[0052] When the speed locker is subjected to an external impact load and pushes the piston rod 4 to move to the left, the second movable baffle 97 and the second movable pressure equalizing plate 99 fit together and push the elastic member 95 to be compressed to the left. The left end of the elastic member 95 pushes the first movable pressure equalizing plate 98 and the first fixed baffle 93 to fit together; the second movable pressure equalizing plate 99 and the second fixed baffle 94 disengage from each other, and the first movable baffle 96 and the first movable pressure equalizing plate 98 disengage from each other.

[0053] The first movable pressure equalizing plate 98 and the second movable pressure equalizing plate 99 are respectively located at the two ends of the elastic member 95 and are used to apply the linear motion of the piston rod 4 in the elastic member cylinder 92 to the elastic member 95. Both ends of the elastic member 95 can be evenly pressurized to improve the working reliability of the elastic member 95.

[0054] In some optional embodiments: See Figure 2 As shown, an embodiment of the present application provides an elastic self-recovering structure of a speed lock, wherein the first fixed baffle 93 of the elastic self-recovering structure of the speed lock is a circular steel plate and is located at one end close to the speed lock, and the second fixed baffle 94 is a circular sleeve and is located at one end away from the speed lock, and the second fixed baffle 94 is threadedly connected to the elastic member cylinder body 92.

[0055] The outer diameter of the first movable baffle 96 is smaller than the inner diameter of the first fixed baffle 93, and the first movable baffle 96 is coaxially arranged with the first fixed baffle 93, and the first movable baffle 96 can move freely in the first fixed baffle 93. The outer diameter of the second movable baffle 97 is smaller than the inner diameter of the second fixed baffle 94, and the second movable baffle 97 is coaxially arranged with the second fixed baffle 94, and the second movable baffle 97 can move freely in the second fixed baffle 94.

[0056] One end of the piston rod 4 extending into the elastic member cylinder 92 is provided with an external thread connecting the first movable baffle 96 and the second movable baffle 97, and the first movable baffle 96 and the second movable baffle 97 are both threadedly fixedly connected to the piston rod 4. The second fixed baffle 94 is threadedly connected to the elastic member cylinder 92, so as to facilitate the installation and positioning of the elastic member 95 in the elastic member cylinder 92, and the first movable baffle 96 and the second movable baffle 97 are both threadedly fixedly connected to the piston rod 4, so as to facilitate the installation and positioning of the elastic member 95 on the piston rod 4.

[0057] In some optional embodiments: See Figure 1 and Figure 2 As shown, an embodiment of the present application provides a speed lock elastic self-recovering structure, and the two ends of the lock cylinder 6 of the speed lock elastic self-recovering structure are respectively provided with a lock front end cover 5 and a lock rear end cover 8 that close the lock cylinder 6; the lock front end cover 5, the lock rear end cover 8 and the lock cylinder 6 form a closed damping medium containing cavity.

[0058] A front connection end cover 91 and a rear connection end cover for closing the elastic member cylinder 92 are respectively provided at both ends of the elastic member cylinder 92, and the lock rear end cover 8 is fixedly connected to the front connection end cover 91 by bolts to fix the speed locker and the self-restoring mechanism 9 into one. The piston rod 4 passes through the front connection end cover 91, the lock rear end cover 8 and the lock front end cover 5, and the lock rear end cover 8 and the lock front end cover 5 are slidably sealed to prevent the damping medium in the damping medium accommodating cavity from leaking.

[0059] In some optional embodiments: See Figure 1 and Figure 3 As shown, the embodiment of the present application provides an elastic self-restoring structure of a speed locker, in which a first hinge joint 3 is fixedly arranged at one end of a piston rod 4 away from a self-restoring mechanism 9, and the first hinge joint 3 is rotatably connected to a tower end connection support 1 through an axle pin, and the tower end connection support 1 is fixed to a pier column 11 through an anchor. A second hinge joint 10 is fixedly arranged on the rear connection end cover, and the second hinge joint 10 is rotatably connected to a beam end connection support 2 through an axle pin, and the beam end connection support 2 is fixed to a main beam 12 through screws, so as to realize locking and damping adjustment between the main beam 12 and the pier column 11.

[0060] How it works

[0061] An embodiment of the present application provides an elastic self-recovery structure of a speed lock. Since the elastic self-recovery structure of the speed lock of the present application is provided with a speed lock, the speed lock includes a lock cylinder 6, and a piston rod 4 located in the lock cylinder 6 and coaxially arranged with the lock cylinder 6, and a piston 7 is fixedly arranged on the piston rod 4 and is slidably connected to the lock cylinder 6; a self-recovery mechanism 9, which includes an elastic member cylinder 92 located at one end of the lock cylinder 6, one end of the piston rod 4 extends into the elastic member cylinder 92, and an elastic member 95 is provided in the elastic member cylinder 92 for pushing and pulling the piston rod 4 to restore the piston 7 to its original position.

[0062] Therefore, the elastic self-restoring structure of the speed lock of the present application does not provide elastic force to the speed lock when it is not subjected to external impact; when the speed lock is subjected to external impact load and the length dimension changes, the piston rod 4 of the speed lock will drive the elastic member 95 in the elastic member cylinder 92 to compress, and the elastic member 95 provides the speed lock with an elastic restoring force in the opposite direction of the external load, so as to restore the speed lock to its initial length. The elastic self-restoring structure of the speed lock of the present application has good performance and economic performance, can better meet the actual requirements of various projects, and has broad market prospects.

[0063] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0064] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0065] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A speed lock elastic self-recovery structure, characterized in that: include: A speed locker, the speed locker comprising a locker cylinder (6), and a piston rod (4) located in the locker cylinder (6) and coaxially arranged with the locker cylinder (6), wherein a piston (7) is fixedly arranged on the piston rod (4) and is slidably connected to the locker cylinder (6); A self-restoring mechanism (9), the self-restoring mechanism (9) comprising an elastic member cylinder (92) located at one end of the locking cylinder (6), one end of the piston rod (4) extending into the elastic member cylinder (92), and an elastic member (95) for pushing and pulling the piston rod (4) to restore the piston (7) to its original position is arranged in the elastic member cylinder (92); A first fixed baffle plate (93) and a second fixed baffle plate (94) are fixedly disposed in the elastic member cylinder (92), and the elastic member (95) is positioned between the first fixed baffle plate (93) and the second fixed baffle plate (94); The piston rod (4) is fixedly provided with a first movable baffle (96) and a second movable baffle (97) which are arranged at intervals, and the elastic member (95) is sleeved on the piston rod (4) and is located between the first movable baffle (96) and the second movable baffle (97); The piston rod (4) is movably connected to a first movable pressure equalizing plate (98) and a second movable pressure equalizing plate (99) which are spaced apart from each other, and the elastic member (95) is located between the first movable pressure equalizing plate (98) and the second movable pressure equalizing plate (99); The first fixed baffle (93) and / or the first movable baffle (96) are in contact with the first movable pressure equalizing plate (98); The second fixed baffle (94) and / or the second movable baffle (97) are in contact with the second movable pressure equalizing plate (99); When the speed locker is subjected to an external impact load and pushes the piston rod (4) to move to the right, the first movable baffle (96) and the first movable pressure equalizing plate (98) fit together and push the elastic member (95) to be compressed to the right, and the right end of the elastic member (95) pushes the second movable pressure equalizing plate (99) and the second fixed baffle (94) to fit together; the first movable pressure equalizing plate (98) and the first fixed baffle (93) are separated from each other, and the second movable baffle (97) and the second movable pressure equalizing plate (99) are separated from each other; When the speed lock is subjected to an external impact load and pushes the piston rod (4) to move to the left, the second movable baffle (97) and the second movable pressure equalizing plate (99) fit together and push the elastic member (95) to be compressed to the left, and the left end of the elastic member (95) pushes the first movable pressure equalizing plate (98) and the first fixed baffle (93) to fit together; the second movable pressure equalizing plate (99) and the second fixed baffle (94) are separated from each other, and the first movable baffle (96) and the first movable pressure equalizing plate (98) are separated from each other.

2. The elastic self-restoring structure of a speed lock according to claim 1, characterized in that: The elastic member (95) is a helical compression spring which is sleeved on the piston rod (4) and coaxially connected to the piston rod (4).

3. The elastic self-restoring structure of a speed lock according to claim 1, characterized in that: The elastic member (95) is a plurality of mutually stacked disc springs which are sleeved on the piston rod (4) and coaxially connected to the piston rod (4).

4. The elastic self-restoring structure of a speed lock according to claim 1, characterized in that: The first fixed baffle (93) is a circular steel plate and is located at one end close to the speed locker, and the second fixed baffle (94) is a circular sleeve and is located at one end away from the speed locker. The second fixed baffle (94) is threadedly connected to the elastic cylinder body (92).

5. The elastic self-restoring structure of a speed lock as claimed in claim 4, characterized in that: The outer diameter of the first movable baffle (96) is smaller than the inner diameter of the first fixed baffle (93), and the first movable baffle (96) and the first fixed baffle (93) are coaxially arranged; The outer diameter of the second movable baffle (97) is smaller than the inner diameter of the second fixed baffle (94), and the second movable baffle (97) and the second fixed baffle (94) are coaxially arranged.

6. The elastic self-restoring structure of a speed lock according to claim 1, characterized in that: One end of the piston rod (4) extending into the elastic member cylinder body (92) is provided with an external thread connecting a first movable baffle (96) and a second movable baffle (97); the first movable baffle (96) and the second movable baffle (97) are both threadedly fixedly connected to the piston rod (4).

7. The elastic self-restoring structure of a speed lock according to claim 1, characterized in that: The two ends of the lock cylinder (6) are respectively provided with a lock front cover (5) and a lock rear cover (8) for closing the lock cylinder (6); The two ends of the elastic member cylinder (92) are respectively provided with a front connection end cover (91) and a rear connection end cover for closing the elastic member cylinder (92), and the rear end cover (8) of the locker is fixedly connected to the front connection end cover (91); The piston rod (4) passes through the front connection end cover (91), the lock rear end cover (8) and the lock front end cover (5), and is slidably sealedly connected to the lock rear end cover (8) and the lock front end cover (5).

8. The elastic self-restoring structure of a speed lock according to claim 7, characterized in that: A first hinged joint (3) is fixedly provided at one end of the piston rod (4) away from the self-restoring mechanism (9), and the first hinged joint (3) is rotatably connected to a tower end connecting support (1) via an axle pin; A second hinged joint (10) is fixedly provided on the rear connection end cover, and the second hinged joint (10) is rotatably connected to a beam end connection support (2) via an axle pin.

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