Sand box cover interlock, sand box assembly and railway locomotive

Abstract

This application discloses a sand box cover interlocking device, a sand box assembly, and a railway locomotive. The sand box cover interlocking device includes a base, a cover plate, a drive mechanism, and a locking mechanism. The cover plate is disposed on one side of the through hole of the base and is rotatably connected to the base. The drive mechanism is mounted on the base, and the actuator of the drive mechanism is pulsatorically connected to the cover plate. The locking mechanism is connected to the base. When the actuator is in the first position, the cover plate is in the closed state, and the locking mechanism is locked to the cover plate. When the actuator is in the second position, the cover plate is in the open state. During the switching between the first and second positions, the actuator drives the locking mechanism to move relative to the base, so that the locking mechanism and the cover plate are unlocked, and drives the cover plate to switch between the closed and open states. The above solution executes the unlocking, locking, opening, and closing actions of the cover plate through the same drive mechanism, realizing automated operation and significantly improving the efficiency of sand adding operations.

Description

Technical Field

[0001] This application relates to the field of railway locomotive technology, and particularly to a sand box cover interlocking device, a sand box assembly, and a railway locomotive. Background Technology

[0002] In the field of railway locomotives, sand boxes are key components used to store dry silica sand. This silica sand is sprayed between the wheels and rails by a sand-spraying device to increase the wheel-rail adhesion coefficient and prevent the wheels from slipping. The top of the sand box is usually equipped with a sand box cover to facilitate the replenishment of silica sand into the sand box.

[0003] In related technologies, sand box covers are mostly controlled manually, requiring operators to manually perform a series of actions such as unlocking, opening, closing, and locking. This manual operation method has the following problems: First, the efficiency of sand adding is low, especially when frequent sand adding is required or in harsh working environments (such as rain, snow, or low temperatures), as manually opening the cover is laborious and time-consuming; second, when manually opening or closing the cover, operators' hands are easily pinched by the gap between the cover and the box body, posing a safety hazard. Summary of the Invention

[0004] This application discloses a sand box cover interlocking device, a sand box assembly, and a railway locomotive, in order to solve the problems of low efficiency and easy injury caused by manual operation in related technologies.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows: In a first aspect, embodiments of this application disclose a sand box cover interlocking device, which includes a base, a cover plate, a driving mechanism, and a locking mechanism. The base has a through hole, the cover plate is placed on one side of the through hole and is rotatably connected to the base, the drive mechanism is mounted on the base, the drive mechanism includes an actuator, the actuator is pulsatorically connected to the cover plate, and the locking mechanism is connected to the base; When the actuator is in the first position, the cover is in the closed state and the locking mechanism is locked to the cover. When the actuator is in the second position, the cover is in the open state. During the switching between the first position and the second position, the actuator drives the locking mechanism to move relative to the base, so that the locking mechanism and the cover plate are in an unlocked state, and drives the cover plate to switch between the closed state and the open state.

[0006] Optionally, the actuator has a first travel range and a second travel range between the first position and the second position; When the actuator is in the first travel range, the actuator drives the locking mechanism and the cover plate to be in an unlocked state; When the actuator is in the second stroke range, the actuator drives the cover plate to rotate and switch between the closed state and the open state.

[0007] Optionally, the locking mechanism includes a locking pin, an elastic element, and a rotating rod; The locking pin is slidably disposed in the mounting hole of the base, the elastic element is elastically supported between the locking pin and the mounting hole, a portion of the rotating rod is disposed in the mounting space of the base, wherein the mounting space and the mounting hole are interconnected; the middle section of the rotating rod is rotatably connected to the base, one end of the rotating rod is rotatably connected to the locking pin, and the other end of the rotating rod is provided with a snap-fit ​​part; When the actuator is in the first position, the elastic member supports the locking pin so that the end of the locking pin is exposed in the mounting hole, and the snap-fit ​​portion snaps into the cover plate. When the actuator is in the first stroke range, the actuator drives the locking pin to move into the mounting hole, and the locking pin drives the rotating rod to rotate, so that the locking part separates from the cover plate.

[0008] Optionally, the rotating rod includes a rotating rod body and a sleeve rod; The middle section of the rotating rod body is rotatably connected to the base, the sleeve is sleeved on one end of the rotating rod body and slidably connected to the rotating rod body, the other end of the rotating rod body is provided with the snap-fit ​​part, and the locking pin is rotatably connected to the sleeve. The locking pin is used to drive the sleeve rod to swing, and through the sleeve rod, it drives the rotating rod body to rotate relative to the base, so that the locking part can engage or disengage with the cover plate.

[0009] Optionally, the drive mechanism further includes a drive unit and a transmission unit; The drive unit is mounted on the base, and the output shaft of the drive unit is fixedly connected to the actuator to drive the actuator to rotate and switch between the first position and the second position; The outer peripheral surface of the actuator is used to slide with the locking pin. The outer peripheral surface is provided with a recess. When the actuator is in the first position, the end of the locking pin extends into the recess and engages with the actuator. The actuator is provided with a connecting rod, one end of the transmission part is hinged to the free end of the connecting rod, and the other end of the transmission part is connected to the cover plate in a transmission manner.

[0010] Optionally, the transmission unit includes a first link and a second link; One end of the first connecting rod is provided with a strip-shaped hole, the free end of the connecting rod is hinged to the strip-shaped hole and slidably connected to the strip-shaped hole, the second connecting rod includes a first part and a second part connected at a preset angle, the end of the first part is hinged to the other end of the first connecting rod, and the end of the second part is connected to the cover plate in a transmission manner. When the actuator is in the first stroke range, the free end of the connecting rod slides between the opposite ends of the strip hole.

[0011] Optionally, the cover plate includes a cover plate body and a mating part fixedly disposed on the side of the cover plate body; The mating part has a sliding mating surface on the side near the actuator. When the actuator is in the first position, a portion of the outer peripheral surface of the actuator abuts against the sliding mating surface to press the cover plate body against one side of the through hole. The mating part has a receiving hole on the side near the locking mechanism. The wall of the receiving hole has a slot. When the actuator is in the first position, the engaging part extends into the receiving hole and engages with the slot. When the actuator is in the first stroke range, the engaging part separates from the slot.

[0012] Optionally, the sand box cover interlocking device further includes a bearing seat, a shaft, and a torsion spring; The bearing seat is fixedly mounted on the base, the shaft passes through the bearing seat and is rotatably connected to the bearing seat, the side of the cover plate is provided with a connecting part, the connecting part is fixedly connected to the shaft, and the transmission part is throttlely connected to the shaft; The torsion spring is sleeved outside the shaft and elastically supported between the shaft seat and the connecting part, and is used to provide the cover plate with an elastic preload force to switch to the closed state.

[0013] Secondly, this application discloses a sand box assembly, which includes a box body and the sand box cover interlocking device described in the first aspect. The box body has an opening, and the base cover is disposed on the opening and fixedly connected to the box body.

[0014] Thirdly, embodiments of this application disclose a railway locomotive, which includes a locomotive body and the sand box assembly described in the second aspect, wherein the sand box assembly is connected to the locomotive body.

[0015] The technical solution adopted in this application can achieve the following technical effects: The sand box cover interlocking device, sand box assembly, and railway locomotive disclosed in this application improve upon related technologies. By utilizing the coordinated operation of the actuator, cover plate, and locking mechanism, when the actuator is in the first position, the cover plate is closed, and the locking mechanism is locked to the cover plate, preventing accidental opening of the sand box cover. When the actuator is in the second position, the cover plate is open. During the switching between the first and second positions, the actuator drives the locking mechanism to unlock and drives the cover plate to open or close. This solution executes the unlocking, locking, opening, and closing actions of the cover plate through a single drive mechanism, achieving automated operation without manual intervention, significantly improving the efficiency of sand filling operations. Simultaneously, it avoids the problem of hand injuries that can occur during manual operation, improving safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the sand box assembly disclosed in the embodiments of this application; Figure 2 This is one of the structural schematic diagrams of the sand box cover interlocking device disclosed in the embodiments of this application; Figure 3 This is a second schematic diagram of the structure of the sand box cover interlocking device disclosed in the embodiments of this application; Figure 4 This is one of the schematic diagrams showing the cooperation between the driving mechanism and the locking mechanism disclosed in the embodiments of this application; Figure 5 This is a schematic diagram of the installation structure of the cover plate disclosed in an embodiment of this application; Figure 6 This is a second schematic diagram showing the cooperation between the driving mechanism and the locking mechanism disclosed in the embodiments of this application; Figure 7 This is the third schematic diagram showing the cooperation between the driving mechanism and the locking mechanism disclosed in the embodiments of this application; Figure 8 This is one of the partial structural schematic diagrams of the sand box assembly disclosed in the embodiments of this application; Figure 9 This is a second partial structural schematic diagram of the sand box assembly disclosed in the embodiments of this application; Figure 10 This is the third partial structural schematic diagram of the sand box assembly disclosed in the embodiments of this application; Figure 11 This is the fourth partial structural schematic diagram of the sand box assembly disclosed in the embodiments of this application; Figure 12 This is the fifth partial structural schematic diagram of the sand box assembly disclosed in the embodiments of this application; Figure 13 This is the sixth partial structural schematic diagram of the sand box assembly disclosed in the embodiments of this application.

[0017] Explanation of reference numerals in the attached figures: 100-Sandbox cover interlocking device, 110-Base, 111-Through hole, 112-Mounting hole, 113-Mounting space, 120-Cover plate, 121-Cover plate body, 122-Mating part, 1221-Sliding mating surface, 1222-Receiving hole, 1223-Slot, 123-Connecting part, 130-Drive mechanism, 131-Actuating component, 1311-Recess, 1312-Connecting rod, 132-Drive Moving part, 133-Transmission part, 1331-First connecting rod, 1331a-Strip hole, 1332-Second connecting rod, 1332a-First part, 1332b-Second part, 140-Locking mechanism, 141-Locking pin, 142-Elastic element, 143-Rotating rod, 1431-Rotating rod body, 1432-Sleeve rod, 144-Snap-fit ​​part, 150-Shaft seat, 160-Shaft, 170-Torsion spring, 200-Box. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0019] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more.

[0020] The technical solutions disclosed in the various embodiments of this application are described in detail below with reference to the accompanying drawings.

[0021] Please refer to Figures 1 to 13This application discloses a sand box cover interlocking device 100, which may include a base 110, a cover plate 120, a drive mechanism 130, and a locking mechanism 140. The base 110 serves as the mounting base for the cover plate 120, the drive mechanism 130, and the locking mechanism 140, and can be fixedly installed at the opening of the sand box assembly's housing 200. The base 110 has a through hole 111 for connecting the interior and exterior of the housing 200 to facilitate the addition of sand. The base 110 can be a cast or welded structure. To facilitate the connection between the base 110 and the housing 200, bolt holes can be provided on the edge of the base 110, allowing for assembly and fixation of the base 110 and the housing 200 via bolt connections.

[0022] A cover plate 120 is disposed over one side of the through hole 111 (i.e., the side of the through hole 111 away from the interior of the housing 200). The cover plate 120 is rotatably connected to the base 110, for example, by means of a hinge, pivot, or other structure. The cover plate 120 can be flipped relative to the base 110 to close or open the through hole 111. A sealing ring may be provided on the lower surface of the cover plate 120 to form a seal with the base 110 in the closed state.

[0023] The drive mechanism 130 is mounted on the base 110. The drive mechanism 130 may include an actuator 131. The drive mechanism 130 provides power, and the drive source of the drive mechanism 130 may be a rotary cylinder, a motor, etc. The actuator 131 is the component in the drive mechanism 130 that directly participates in the motion output; for example, the actuator 131 may be a cam, an eccentric wheel, a crank structure, etc. The actuator 131 and the cover plate 120 can transmit motion through a transmission connection (e.g., connecting rod, gear, etc.), so that the movement of the actuator 131 can drive the cover plate 120 to rotate.

[0024] The locking mechanism 140 is connected to the base 110. The locking mechanism 140 is used to lock the cover 120 when it is closed, preventing accidental opening of the cover 120. The locking mechanism 140 can be implemented as a pin type (inserting a retractable pin into a hole in the cover 120), a hook type (locking the cover 120 with a rotatable hook), a pawl type, or a ratchet type, etc. The locking mechanism 140 can be directly or indirectly driven by the actuator 131, thereby switching between an unlocked state and a locked state.

[0025] In terms of specific operating conditions, such as Figure 8As shown, when the actuator 131 is in the first position, the cover plate 120 covers the through hole 111 and is in a closed state. Simultaneously, the locking mechanism 140 engages or hooks with the cover plate 120, and both are locked. At this time, the cover plate 120 cannot be opened by external force. When the actuator 131 is in the second position, the cover plate 120 is driven to the open state, at which point the through hole 111 is open to facilitate the addition of sand. For example, the second position can be the position after the actuator 131 has rotated 60° to 90° from the first position; correspondingly, the cover plate 120 can be flipped upwards by 60° to 90° from the closed state to switch to the open state.

[0026] like Figures 9 to 11 As shown, when the cover 120 needs to be opened, the drive mechanism 130 drives the actuator 131 to move from the first position to the second position. During this switching process, the actuator 131 first drives the locking mechanism 140 to move relative to the base 110, thereby releasing the locking relationship between the locking mechanism 140 and the cover 120 and entering the unlocked state. Subsequently, the actuator 131 continues to move, driving the cover 120 to gradually flip from the closed state to the open state through the transmission connection. When the actuator 131 reaches the second position, the cover 120 is in the open state. The above-mentioned "unlock first, then open" sequence is determined by the movement trajectory of the actuator 131 and the timing of its contact with the locking mechanism 140 and the cover 120, without the need for additional control logic.

[0027] like Figure 8 , Figure 12 and Figure 13 As shown, when the cover 120 needs to be closed, the drive mechanism 130 reverses the movement of the actuator 131 from the second position to the first position. During this switching process, the actuator 131 can drive the cover 120 to rotate from the open state to the closed state while the locking mechanism 140 is still in the unlocked state. After the cover 120 is fully closed, the actuator 131 continues to move, releasing the driving force on the locking mechanism 140, causing the locking mechanism 140 to reset and re-enter the locked state with the cover 120. When the actuator 131 returns to the first position, the cover 120 is in the closed state and the locking mechanism 140 and the cover 120 are in the locked state. It should be noted that the force that resets the locking mechanism 140 can be the elastic force provided by the spring or the elastic force inherent in the locking mechanism 140 itself.

[0028] As described above, the sand box cover interlocking device 100 disclosed in this application improves upon related technologies. Utilizing the coordinated operation of the actuator 131, the cover plate 120, and the locking mechanism 140, when the actuator 131 is in the first position, the cover plate 120 is closed, and the locking mechanism 140 is locked to the cover plate 120, preventing accidental opening of the sand box cover. When the actuator 131 is in the second position, the cover plate 120 is open. During the switching between the first and second positions, the actuator 131 drives the locking mechanism 140 to unlock and drives the cover plate 120 to open or close. This solution executes the unlocking, locking, opening, and closing actions of the cover plate 120 through the same drive mechanism 130, achieving automated operation without manual intervention, significantly improving the efficiency of sand filling operations. Simultaneously, it avoids the problem of hand injuries during manual operation, enhancing safety.

[0029] In one optional embodiment of this application, the actuator 131 has a first travel interval and a second travel interval between a first position and a second position. The first travel interval is closer to the first position and is independent of it, while the second travel interval is closer to the second position and may include the second position.

[0030] When the actuator 131 is in the first stroke range, it only drives the locking mechanism 140 to perform the corresponding action, changing the relationship between the locking mechanism 140 and the cover plate 120 from a locked state to an unlocked state. Within the first stroke range, the transmission connection between the actuator 131 and the cover plate 120 is in a no-stroke or non-driven state. When the actuator 131 is in the second stroke range, the locking mechanism 140 remains unlocked, and the actuator 131 begins to drive the cover plate 120 to rotate, switching the cover plate 120 between a closed state and an open state.

[0031] The two stroke intervals mentioned above can be achieved through the outer contour curve of the actuator 131, the idle stroke structure of the transmission component (such as the strip hole 1331a), or the separate design of the cam follower. For example, the actuator 131 can be designed as a cam, which pushes the locking mechanism 140 in the first half and pushes the cover plate 120 through the connecting rod in the second half.

[0032] It should be noted that when the actuator 131 is within the second travel range, and the opening process of the cover 120 does not interfere with the locking mechanism 140, the actuator 131 can also release the locking mechanism 140 to reset it; when the cover 120 needs to be closed, the actuator 131 can re-drive the locking mechanism 140 to switch to the unlocked state. In other words, the second travel range can include a first sub-range and a second sub-range, wherein the first sub-range and the first travel range are continuous ranges, and the second sub-range and the first sub-range are continuous ranges, but the second sub-range and the first travel range are spaced apart; when the actuator 131 is in the first sub-range, the locking mechanism 140 can remain in the unlocked state, and when the actuator 131 is in the second sub-range, the actuator 131 can release the locking mechanism 140 to reset it.

[0033] Furthermore, such as Figure 6 and Figure 7 As shown, the locking mechanism 140 described above may include a locking pin 141, an elastic element 142, and a rotating rod 143. The base 110 is provided with a mounting hole 112 and a mounting space 113. The mounting hole 112 may be a circular hole, and the mounting space 113 communicates with the mounting hole 112. The locking pin 141 is slidably disposed in the mounting hole 112. The locking pin 141 may be a stepped shaft, with its end near the actuator 131 being hemispherical or conical, so as to slide against the outer circumferential surface of the actuator 131. The elastic element 142 may be a spring, rubber, silicone, etc., and is elastically supported between the locking pin 141 and the bottom of the mounting hole 112. The elastic element 142 can apply an elastic force to the locking pin 141, causing it to move towards the actuator 131.

[0034] A portion of the rotating rod 143 is housed in the installation space 113, and the middle section of the rotating rod 143 is rotatably connected to the base 110. One end of the rotating rod 143 is rotatably connected to the locking pin 141, and the other end of the rotating rod 143 is provided with a snap-fit ​​part 144. The snap-fit ​​part 144 can be a bent hook-shaped or columnar structure.

[0035] When the actuator 131 is in the first position, the elastic element 142 can push the locking pin 141, so that the end of the locking pin 141 is exposed in the mounting hole 112. One end of the rotating rod 143 is pulled by the locking pin 141, causing the rotating rod 143 to rotate, thereby causing the locking part 144 at the other end of the rotating rod 143 to engage with the cover plate 120, thus achieving locking.

[0036] When the actuator 131 is in the first stroke range, the outer peripheral surface of the actuator 131 presses against the end of the locking pin 141, overcoming the elastic force of the elastic member 142, causing the locking pin 141 to move into the mounting hole 112. The locking pin 141 can drive the rotating rod 143 to rotate in the opposite direction, so that the locking part 144 and the cover plate 120 are separated from each other, thereby unlocking.

[0037] The above scheme utilizes the rotation of the actuator 131 to directly drive the locking pin 141 to slide, and then amplifies the motion through the rotating rod 143 and converts the sliding of the locking pin 141 into the rotational motion of the rotating rod 143, so as to realize the separation or engagement of the locking part 144 and the cover plate 120, which is suitable for installation in the limited space on the side of the sand box cover.

[0038] To absorb machining and assembly errors and prevent the rotating rod 143 from jamming, in this embodiment, the rotating rod 143 may include a rotating rod body 1431 and a sleeve rod 1432. The middle section of the rotating rod body 1431 is rotatably connected to the base 110, and the sleeve rod 1432 is sleeved on one end of the rotating rod body 1431 and slidably connected to it. The other end of the rotating rod body 1431 is provided with a locking part 144, and a locking pin 141 is rotatably connected to the sleeve rod 1432.

[0039] When the locking pin 141 moves into or out of the mounting hole 112, it first drives the sleeve rod 1432 to slide relative to the rotating rod body 1431. This sliding stroke can absorb some displacement. After the sleeve rod 1432 slides to its limit position, the continuing movement of the locking pin 141 drives the rotating rod body 1431 to rotate relative to the base 110 through the swing of the sleeve rod 1432, thereby causing the locking part 144 to engage or disengage with the cover plate 120. By adopting the above scheme, a buffer stroke is provided by the sliding connection between the sleeve rod 1432 and the rotating rod body 1431, making the locking mechanism 140 insensitive to part dimensional tolerances and assembly errors, reducing manufacturing precision requirements, and making the unlocking and locking actions smoother, reducing impact and noise.

[0040] like Figures 1 to 4 As shown, the drive mechanism 130 described above may further include a drive unit 132 and a transmission unit 133. The drive unit 132 is mounted on the base 110 and may be a rotary cylinder, a servo motor, or a stepper motor, etc. The output shaft of the drive unit 132 is fixedly connected to the actuator 131 to drive the actuator 131 to rotate and switch between a first position and a second position.

[0041] The outer peripheral surface of the actuator 131 is used for sliding engagement with the locking pin 141. A recess 1311 is provided on this outer peripheral surface. When the actuator 131 is in the first position, the end of the locking pin 141 extends into the recess 1311 under the push of the elastic member 142, engaging with the actuator 131 to form a limit, thus ensuring that the actuator 131 is stably held in the first position and preventing accidental opening of the cover plate 120. By utilizing the limiting engagement between the locking pin 141 and the recess 1311, combined with the locking effect of the locking mechanism 140 described above on the cover plate 120, the probability of accidental opening of the cover plate 120 can be significantly reduced.

[0042] The actuator 131 is also provided with a connecting rod 1312, which can be fixed to the side of the actuator 131 and moves synchronously with the actuator 131. One end of the transmission part 133 is hinged to the free end of the connecting rod 1312, and the other end of the transmission part 133 is connected to the cover plate 120 in a transmission manner. The transmission part 133 can be a single connecting rod or a linkage group composed of multiple connecting rods.

[0043] In order to achieve the function of not driving the cover plate 120 during the first stroke range (no-load stroke), in this embodiment, the transmission part 133 may include a first connecting rod 1331 and a second connecting rod 1332. One end of the first connecting rod 1331 is provided with a strip hole 1331a, and the free end of the connecting rod 1312 is hinged in the strip hole 1331a and can slide freely between the two ends of the strip hole 1331a (for example, by passing through the strip hole 1331a through a hinge shaft).

[0044] The second connecting rod 1332 includes a first part 1332a and a second part 1332b connected at a preset angle. This preset angle can be 70° to 120°, and the second connecting rod 1332 can be V-shaped or L-shaped. The end of the first part 1332a is hinged to the other end of the first connecting rod 1331. The end of the second part 1332b is drive-connected to the cover plate 120.

[0045] When the actuator 131 is in the first stroke range, the connecting rod 1312 swings with the actuator 131, but its free end only slides within the slot 1331a and has not yet driven the first connecting rod 1331. Therefore, neither the first connecting rod 1331 nor the second connecting rod 1332 moves, and the cover plate 120 remains stationary. When the actuator 131 enters the second stroke range, the free end of the connecting rod 1312 slides to the end of the slot 1331a and begins to drive the first connecting rod 1331 to swing, thereby driving the second connecting rod 1332 to swing, which in turn causes the cover plate 120 to flip. Using the above design, a simple idle stroke delay mechanism is realized using the slot 1331a, eliminating the need for a complex clutch structure and offering advantages such as low cost and high reliability.

[0046] like Figures 3 to 7 As shown, the cover plate 120 may include a cover plate body 121 and a mating part 122 fixedly disposed on the side of the cover plate body 121. The mating part 122 may be integrally cast or welded to the cover plate body 121. A sliding mating surface 1221 is provided on the side of the mating part 122 near the actuator 131. The sliding mating surface 1221 may be an arc surface or a bevel. When the actuator 131 is in the first position, a portion of the outer peripheral surface of the actuator 131 abuts against the sliding mating surface 1221, thereby pressing the cover plate body 121 downward against one side of the through hole 111 to achieve a seal.

[0047] The mating part 122 has a receiving hole 1222 on the side near the locking mechanism 140. The receiving hole 1222 can be a blind hole, and its wall has a slot 1223. When the actuator 131 is in the first position, the locking part 144 of the rotating rod 143 can extend into the receiving hole 1222 and engage with the slot 1223 to achieve mechanical locking. When the actuator 131 is in the first stroke range, the locking part 144 separates from the slot 1223, completing the unlocking.

[0048] By integrating the clamping and locking functions into the same mating part 122, space is saved. The actuator 131 can both drive the locking mechanism 140 to unlock and the cover 120 to rotate, and can also press the cover 120 against one side of the through hole 111 when it is in the first position, further improving the reliability of the cover 120 in the closed state.

[0049] Furthermore, to facilitate the installation and operation of the cover plate 120, the sand box cover interlocking device 100 may also include a bearing seat 150, a shaft 160, and a torsion spring 170. The bearing seat 150 is fixedly mounted on the base 110. The bearing seat 150 may be two opposing vertical plates, each with a shaft hole. The shaft 160 may pass through the bearing seat 150 and be rotatably connected to the bearing seat 150 via a sliding bearing or a needle roller bearing. The axis of the shaft 160 is horizontal and located on the rear side of the cover plate 120. The side (specifically the rear side) of the cover plate 120 is provided with a connecting part 123, which is fixedly connected to the shaft 160. Therefore, when the shaft 160 rotates, the cover plate 120 rotates synchronously.

[0050] The transmission unit 133 is connected to the shaft 160. Specifically, as described above, the second part 1332b of the second link 1332 can be fixedly connected to the shaft 160. When the actuator 131 drives the first link 1331 and the second link 1332 to move, the shaft 160 can be driven to rotate through the first link 1331 and the second link 1332, thereby realizing the rotation of the cover plate 120.

[0051] A torsion spring 170 is sleeved outside the shaft 160. One end of the torsion spring 170 is secured to the bearing seat 150, and the other end is secured to the connecting part 123. The torsion spring 170 can provide an elastic preload force to the cover plate 120 to switch to the closed state. That is, the torsion spring 170 provides an auxiliary closing force during the closing process, ensuring that the cover plate 120 is completely closed and pressed against the through hole 111 even if there is a transmission gap in the transmission part 133; at the same time, the mating structure between the bearing seat 150 and the shaft 160 ensures the accuracy and stability of the cover plate 120's flipping.

[0052] like Figures 1 to 13As shown in the embodiment of this application, a sand box assembly is also disclosed. The sand box assembly includes a box body 200 and the sand box cover interlocking device 100 mentioned above. The box body 200 has an opening, and the base 110 is placed on the opening and fixedly connected to the box body 200 by bolt connection, welding or other means.

[0053] As described above, the sand box assembly disclosed in this application improves upon related technologies by utilizing the linkage between the actuator 131, the cover plate 120, and the locking mechanism 140. When the actuator 131 is in the first position, the cover plate 120 is closed, and the locking mechanism 140 is locked to the cover plate 120, preventing accidental opening of the sand box cover. When the actuator 131 is in the second position, the cover plate 120 is open. During the switching between the first and second positions, the actuator 131 drives the locking mechanism 140 to unlock and drives the cover plate 120 to open or close. This solution executes the unlocking, locking, opening, and closing actions of the cover plate 120 through the same drive mechanism 130, achieving automated operation without manual intervention, significantly improving the efficiency of sand filling operations. Simultaneously, it avoids the problem of hand injuries during manual operation, enhancing safety.

[0054] Please refer to Figures 1 to 13 This application also discloses a railway locomotive, which includes a locomotive body and the sand box assembly described above. The sand box assembly can be connected to the locomotive body by means of bolts, snap-fit, or other methods.

[0055] As described above, the railway locomotive disclosed in this application improves upon related technologies by utilizing the linkage between the actuator 131, the cover plate 120, and the locking mechanism 140. When the actuator 131 is in the first position, the cover plate 120 is closed, and the locking mechanism 140 is locked to the cover plate 120, preventing accidental opening of the sand box cover. When the actuator 131 is in the second position, the cover plate 120 is open. During the switching between the first and second positions, the actuator 131 drives the locking mechanism 140 to unlock and drives the cover plate 120 to open or close. This solution executes the unlocking, locking, opening, and closing actions of the cover plate 120 through the same drive mechanism 130, achieving automated operation without manual intervention and significantly improving the efficiency of sand filling operations. Simultaneously, it avoids the problem of hand injuries during manual operation, enhancing safety.

[0056] The above embodiments of this application focus on describing the differences between the various embodiments. As long as the different technical features between the various embodiments are not contradictory, they can be combined to form more specific embodiments. For the sake of brevity, they will not be described in detail here.

[0057] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A sand box cover interlocking device, characterized in that, Includes base, cover plate, drive mechanism and locking mechanism; The base has a through hole, the cover plate is placed on one side of the through hole and is rotatably connected to the base, the drive mechanism is mounted on the base, the drive mechanism includes an actuator, the actuator is pulsatorically connected to the cover plate, and the locking mechanism is connected to the base; When the actuator is in the first position, the cover is in the closed state and the locking mechanism is locked to the cover. When the actuator is in the second position, the cover is in the open state. During the switching between the first position and the second position, the actuator drives the locking mechanism to move relative to the base, so that the locking mechanism and the cover plate are in an unlocked state, and drives the cover plate to switch between the closed state and the open state.

2. The sand box cover interlocking device according to claim 1, characterized in that, The actuator has a first travel range and a second travel range between the first position and the second position; When the actuator is in the first travel range, the actuator drives the locking mechanism and the cover plate to be in an unlocked state; When the actuator is in the second stroke range, the actuator drives the cover plate to rotate and switch between the closed state and the open state.

3. The sand box cover interlocking device according to claim 2, characterized in that, The locking mechanism includes a locking pin, an elastic element, and a rotating rod; The locking pin is slidably disposed in the mounting hole of the base, the elastic element is elastically supported between the locking pin and the mounting hole, a portion of the rotating rod is disposed in the mounting space of the base, wherein the mounting space and the mounting hole are interconnected; the middle section of the rotating rod is rotatably connected to the base, one end of the rotating rod is rotatably connected to the locking pin, and the other end of the rotating rod is provided with a snap-fit ​​part; When the actuator is in the first position, the elastic member supports the locking pin so that the end of the locking pin is exposed in the mounting hole, and the snap-fit ​​portion snaps into the cover plate. When the actuator is in the first stroke range, the actuator drives the locking pin to move into the mounting hole, and the locking pin drives the rotating rod to rotate, so that the locking part separates from the cover plate.

4. The sand box cover interlocking device according to claim 3, characterized in that, The rotating rod includes a rotating rod body and a sleeve rod; The middle section of the rotating rod body is rotatably connected to the base, the sleeve is sleeved on one end of the rotating rod body and slidably connected to the rotating rod body, the other end of the rotating rod body is provided with the snap-fit ​​part, and the locking pin is rotatably connected to the sleeve. The locking pin is used to drive the sleeve rod to swing, and through the sleeve rod, it drives the rotating rod body to rotate relative to the base, so that the locking part can engage or disengage with the cover plate.

5. The sand box cover interlocking device according to claim 3, characterized in that, The drive mechanism further includes a drive unit and a transmission unit; The drive unit is mounted on the base, and the output shaft of the drive unit is fixedly connected to the actuator to drive the actuator to rotate and switch between the first position and the second position; The outer peripheral surface of the actuator is used to slide with the locking pin. The outer peripheral surface is provided with a recess. When the actuator is in the first position, the end of the locking pin extends into the recess and engages with the actuator. The actuator is provided with a connecting rod, one end of the transmission part is hinged to the free end of the connecting rod, and the other end of the transmission part is connected to the cover plate in a transmission manner.

6. The sand box cover interlocking device according to claim 5, characterized in that, The transmission unit includes a first connecting rod and a second connecting rod; One end of the first connecting rod is provided with a strip-shaped hole, the free end of the connecting rod is hinged to the strip-shaped hole and slidably connected to the strip-shaped hole, the second connecting rod includes a first part and a second part connected at a preset angle, the end of the first part is hinged to the other end of the first connecting rod, and the end of the second part is connected to the cover plate in a transmission manner. When the actuator is in the first stroke range, the free end of the connecting rod slides between the opposite ends of the strip hole.

7. The sand box cover interlocking device according to claim 3, characterized in that, The cover plate includes a cover plate body and a mating part fixedly disposed on the side of the cover plate body; The mating part has a sliding mating surface on the side near the actuator. When the actuator is in the first position, a portion of the outer peripheral surface of the actuator abuts against the sliding mating surface to press the cover plate body against one side of the through hole. The mating part has a receiving hole on the side near the locking mechanism. The wall of the receiving hole has a slot. When the actuator is in the first position, the engaging part extends into the receiving hole and engages with the slot. When the actuator is in the first stroke range, the engaging part separates from the slot.

8. The sand box cover interlocking device according to claim 5, characterized in that, The sand box cover interlocking device also includes a bearing seat, a shaft, and a torsion spring; The bearing seat is fixedly mounted on the base, the shaft passes through the bearing seat and is rotatably connected to the bearing seat, the side of the cover plate is provided with a connecting part, the connecting part is fixedly connected to the shaft, and the transmission part is throttlely connected to the shaft; The torsion spring is sleeved outside the shaft and elastically supported between the shaft seat and the connecting part, and is used to provide the cover plate with an elastic preload force to switch to the closed state.

9. A sand box assembly, characterized in that, The device includes a housing and a sand box cover interlocking device as described in any one of claims 1-8, wherein the housing has an opening, and the base is disposed on the opening and fixedly connected to the housing.

10. A railway locomotive, characterized in that, It includes a locomotive body and the sand box assembly as described in claim 9, wherein the sand box assembly is connected to the locomotive body.

Images