A locking device for garbage transfer equipment

Abstract

The present invention discloses a locking device for garbage transfer equipment, wherein the garbage transfer equipment includes a compression equipment cylinder, and a rear port of the compression equipment cylinder is provided with a door cover that can be opened and closed, and the locking device includes a door cover locating pin fixed to the side of the door cover and a door cover locating lock ear fixed on the rear door frame of the compression equipment cylinder at a position corresponding to the door cover locating pin, the door cover locating lock ear includes a protrusion extending upward, and the door cover locating lock ear supports the door cover locating pin in the closed position of the door cover and abuts against the door cover locating pin in the horizontal direction by means of the protrusion to limit the movement of the door cover in the horizontal direction.

Description

Technical Field

[0001] The invention relates to a locking device, in particular to a locking device used for garbage transfer equipment. Background Art

[0002] The heavy-duty transportation of urban domestic waste is a trend in sanitation operations. Avoiding secondary pollution during waste loading and transportation has become a priority for sanitation vehicle manufacturers.

[0003] During the garbage collection and transportation process, sewage and solid garbage may spill due to the poor sealing of the compression equipment cylinder of the garbage transfer truck, polluting and corroding the road surface. The sealing of the compression equipment cylinder is achieved through the joint action of the compression equipment cylinder and the door cover, and the door cover is a component that needs to be used frequently. The door cover must be opened every time the garbage is dumped. After the garbage is dumped, the door cover must be closed and the compression equipment cylinder must be re-sealed.

[0004] The locking device of the door cover of the garbage transfer vehicle commonly used in the prior art mainly comprises a mechanical door cover positioning lock ear with a downward concave portion and a door cover positioning pin that cooperates with it. This locking device fixes the door cover by continuously applying a holding force by a power mechanism, so in the case of aging failure or failure of the power mechanism, this locking device will not be able to ensure the sealing of the compression device cylinder.

[0005] CN201942232U discloses a garbage transfer truck garbage bin door cover locking device, including three pairs of door cover locking hook devices, namely, an upper locking hook, a lower locking hook, and a lower door locking hook, and three pairs of corresponding locking pins. An adjustable connecting rod mechanism is also provided between the three pairs of linked door cover locking devices. The above-mentioned device adopts six-point linkage locking, which requires a corresponding transmission mechanism. The overall structure is complicated, which increases the difficulty of maintenance and the possibility of failure. When the door cover is closed, the upper locking hook and the lower locking hook lock the locking pins on both sides of the door cover, and the lower door locking hook locks the lower door lock buckle at the bottom of the door cover. Since the upper locking hook, the lower locking hook and the lower door locking hook are linked, the clockwise rotation of the lower door locking hook due to any reason (such as impact) will cause the upper locking hook and the lower locking hook to unlock themselves.

[0006] CN201249989Y discloses a locking mechanism for a door cover of a garbage truck. When the door cover is closed, the lock hook rotates clockwise, and the distance between the door cover and the truck box is gradually shortened under the action of the door opening cylinder, and the sealing strip between the door cover and the truck box is compressed. Then, the door opening cylinder continues to retract to the minimum position, and the door cover is effectively sealed. Since the door opening cylinder needs to maintain a specific length to lock the door cover, the failure of the door opening cylinder due to any reason will cause the sealing of the door cover to fail.

[0007] In summary, in order to ensure the sealing of the cylinder of the compression equipment when the power mechanism fails due to aging or malfunctions, and to simplify the locking device in the prior art, it is necessary to develop an improved locking device. Summary of the invention

[0008] The purpose of the present invention is to ensure the sealing of the cylinder of the compression device when the power mechanism fails due to aging or malfunctions, and to simplify the locking device in the prior art.

[0009] The present invention discloses a locking device for garbage transfer equipment, wherein the garbage transfer equipment comprises a compression equipment cylinder, a rear port of the compression equipment cylinder is provided with a door cover that can be opened and closed, the locking device comprises a door cover locating pin fixed to the side of the door cover and a door cover locating lock ear fixed on the rear door frame of the compression equipment cylinder at a position corresponding to the door cover locating pin, the door cover locating lock ear comprises a protrusion extending upward, and the door cover locating lock ear carries the door cover locating pin in the closed position of the door cover and abuts against the door cover locating pin in the horizontal direction by means of the protrusion to limit the movement of the door cover in the horizontal direction.

[0010] According to an optional embodiment, the compression device cylinder includes a sealing strip arranged at the outer edge of the rear port, and the sealing strip is in close contact with the door cover when the door cover is in the closed position.

[0011] Due to this design, the door cover positioning lock ear plays a role of bearing and limiting. Therefore, even if no force is actively applied to the door cover (for example, applied by a power mechanism), the door cover will remain in close contact with the rear port of the compression device cylinder. In this way, the sealing of the compression device cylinder can be ensured.

[0012] According to an optional embodiment, the profile of the protrusion is designed to gradually release the restriction on the movement of the door cover in the horizontal direction when the door cover moves upward in the vertical direction.

[0013] Due to this design, the door cover is buffered when opening and closing, avoiding the impact on the sealing strip on the rear port of the compression device cylinder, and extending the service life of the sealing strip and the compression device cylinder as a whole.

[0014] According to an optional embodiment, the locking device includes a plurality of door cover positioning pins arranged at intervals in the vertical direction, and a plurality of door cover positioning lock ears arranged at intervals in the vertical direction corresponding to the plurality of door cover positioning pins.

[0015] Due to this design, even if one door cover positioning lock ear is loose, the remaining door cover positioning lock ears can ensure the sealing of the compression equipment cylinder.

[0016] According to an optional embodiment, the locking device also includes a pair of push rods slidably installed on both sides of the compression equipment cylinder along the vertical direction through at least one limit groove, and a first pivot shaft rotatably connected to the upper end of the push rod, and the limit groove is arranged with a wear-resistant gasket on the inner side.

[0017] Due to this design, the push rod does not directly contact the limiting groove, thus avoiding the wear of the limiting groove due to the reciprocating motion of the push rod.

[0018] According to an optional embodiment, the locking device includes a plurality of limiting grooves arranged at intervals along the vertical direction.

[0019] Due to this design, the wear of the wear-resistant gasket in the limit groove caused by the reciprocating motion of the push rod can be shared by multiple parts, thereby extending the cycle of replacing the wear-resistant gasket and reducing maintenance costs.

[0020] According to an optional embodiment, the door cover includes a connection portion rotatably connected to the first pivot shaft, and the connection portion includes a motion conversion mechanism capable of converting the vertical movement of the push rod into the horizontal movement of the door cover.

[0021] Due to this design, the sealing of the door cover can be completed only by the vertical movement of the push rod and the interaction between the door cover positioning lock ear and the door cover positioning pin. At the same time, the sealing and opening and closing of the door cover can be operated by the same device, which simplifies the structure of the locking device and reduces the manufacturing cost.

[0022] According to an optional embodiment, the locking device further comprises a power device mounted on the cylinder of the compression device and hinged to the lower end of the push rod, and the power device comprises a hydraulic cylinder.

[0023] According to an optional embodiment, the compression device cylinder is fixed on the compression device base, the compression device base is supported on the carriage base, and the rear end of the compression device base is hinged to the rear end of the carriage base, the middle part of the carriage base is hinged with a discharge cylinder, the piston rod end of the discharge cylinder is hinged to the middle part of the compression device base, and the axis of the compression device cylinder is parallel to the bottom plane of the carriage base.

[0024] According to an optional embodiment, the locking device includes a control device electrically connected to the power device and the unloading cylinder, the control device is configured to be able to push the push rod upward in the vertical direction with the help of the power device, drive the door cover to move upward, so that the door cover is moved away from the compression equipment cylinder in the horizontal direction under the action of the motion conversion mechanism and the door cover positioning lock ear, and the unloading cylinder is configured to be able to extend the piston rod to lift the front end of the compression equipment base so that the door cover opens.

[0025] Due to this design, when the compression box cylinder is full, the piston rod of the unloading cylinder extends to lift the front end of the compression box base. The door cover at the rear port of the compression box cylinder opens, and the garbage slides out of the compression box cylinder.

[0026] In summary, with the aid of the locking device of the present invention, even if the power mechanism is aged or fails, the door cover can ensure the sealing of the cylinder of the compression equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order that the present invention may be more fully understood, it will now be described by way of example only with reference to the following accompanying drawings, in which:

[0028] Figure 1 It is a side view of a garbage transfer device in the prior art.

[0029] Figure 2 is a side view of a waste transfer device according to an embodiment of the present invention, comprising a locking device according to an embodiment of the present invention, wherein the door cover is in a closed position;

[0030] Figure 3 yes Figure 1 A partial enlarged side view of the garbage transfer equipment in FIG. 1 , wherein the door cover positioning lock ears and the door cover positioning pins are shown;

[0031] Figure 4 yes Figure 1 A side view of the waste transfer device in FIG. 1 with the door cover in an open position; and

[0032] Figure 5 yes Figure 1 A transverse cross-sectional view of the locking device in FIG. DETAILED DESCRIPTION

[0033] Reference Figure 1 , showing a side view of a garbage transfer device in the prior art. A door cover positioning lock ear extending backward is fixedly connected to the rear door frame of the compression box cylinder, and the rear end of the door cover positioning lock ear is bent downward and hooked on the door cover positioning pin.

[0034] Once the door locking cylinder malfunctions or even fails, the door cover will automatically detach due to the combined effect of gravity and the reaction force of the sealing strip, causing leakage of the compression box cylinder.

[0035] Reference Figure 2 , shows a side view of a waste transfer device 1 according to an embodiment of the present invention, which comprises a locking device, wherein the door cover 3 is in a closed position.

[0036] The garbage transfer device 1 includes a compression device cylinder 2. The rear port of the compression device cylinder 2 is provided with a door cover 3 that can be opened and closed. The locking device includes a door cover positioning pin 4 fixed to the side of the door cover 3 and a door cover positioning lock ear 5 fixed on the rear door frame of the compression device cylinder 2 at a position corresponding to the door cover positioning pin 4. The compression device cylinder 2 includes a sealing strip 7 arranged at the outer edge of the rear port. The sealing strip 7 is in close contact with the door cover 3 in the closed position of the door cover 3. The locking device also includes a pair of push rods 9 slidably mounted on both sides of the compression device cylinder 2 in a vertical direction through at least one limiting groove 12, and a first pivot shaft 13 rotatably connected to the upper end of the push rod. The locking device also includes a power device 8 mounted on the compression device cylinder 2 and hinged to the lower end of the push rod 9. Although the power device 8 is a hydraulic cylinder in this embodiment, in other embodiments not shown in the figure, the power device 8 can also be any other device (such as a motor) that can provide power to the push rod 9.

[0037] Reference Figure 3 , showing a partial enlarged side view of the garbage transfer device 1. The door cover positioning lock ear 5 includes a protrusion extending upward. The door cover positioning lock ear 5 carries the door cover positioning pin 4 in the closed position of the door cover 3 and abuts against the door cover positioning pin 4 in the horizontal direction by means of the protrusion to limit the movement of the door cover 3 in the horizontal direction (as shown by the horizontal arrow).

[0038] Due to this design, the door cover positioning lock ear 5 plays a role of bearing and limiting. Therefore, even if no force is actively applied (for example, applied by a power mechanism) to the door cover 3, the door cover 3 will remain in close contact with the rear end of the compression device cylinder 2. In this way, the sealing of the compression device cylinder 2 can be ensured.

[0039] The profile of the protrusion is designed so that when the door cover 3 moves upward in the vertical direction, the restriction on the movement of the door cover 3 in the horizontal direction is gradually released.

[0040] Due to this design, the door cover 3 is buffered when opening and closing, avoiding the impact on the sealing strip 7 at the outer edge of the rear port of the compression device cylinder 2, and extending the service life of the sealing strip 7 and the compression device cylinder 2 as a whole.

[0041] Reference Figure 4 , shows a side view of the garbage transfer device 1, in which the door cover 3 is in the open position. The compression device cylinder 2 is fixed to the compression device base 6. The compression device base 6 is supported on the car body base 15. The rear end of the compression device base 6 is hinged to the rear end of the car body base 15. A discharge cylinder 16 is hinged in the middle of the car body base 15. The piston rod end of the discharge cylinder 16 is hinged in the middle of the compression device base 6. The axis of the compression device cylinder 2 is parallel to the bottom plane of the car body base 15 (that is, perpendicular to the paper direction).

[0042] The locking device includes a control device (not shown) electrically connected to the power device 8 and the discharge cylinder 16. The control device is configured to push the push rod 9 upward in the vertical direction with the help of the power device 8, driving the door cover 3 to move upward, so that the door cover 3 is horizontally away from the compression device cylinder 2 under the action of the motion conversion mechanism 10 and the door cover positioning lock ear 5. The discharge cylinder 16 is configured to extend the piston rod to lift the front end of the compression device base 6 so that the door cover 3 is opened.

[0043] Reference Figure 5 , shows a transverse cross-sectional view of the locking device. A wear-resistant gasket 14 is arranged on the inner side of the limiting groove 12.

[0044] Due to this design, the wear-resistant pad 14 surrounds the push rod 9, so that the movement of the push rod 9 does not cause wear to the limit groove 12, but only consumes the wear-resistant pad 14. When the wear-resistant pad 14 has become thin enough, the wear-resistant pad 14 can be taken out and replaced by removing the cover plate on one side of the limit groove 12.

[0045] The above description is only a preferred embodiment of the present invention, and does not limit the scope of patent protection of the present invention. In addition to the above embodiments, the present invention may also have other implementations. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention. The technical features not described in the present invention can be realized by or using existing technologies, and will not be repeated here.

Claims

1. A locking device for garbage transfer equipment, wherein: The garbage transfer equipment comprises: a locking device, a compression equipment cylinder fixed on the compression equipment base, a rear port of the compression equipment cylinder is provided with a door cover that can be opened and closed, the compression equipment base is supported on the carriage base, and the rear end of the compression equipment base is hinged to the rear end of the carriage base, a discharge cylinder is hinged in the middle of the carriage base, and the piston rod end of the discharge cylinder is hinged in the middle of the compression equipment base, and the discharge cylinder is configured to be able to extend the piston rod to lift the front end of the compression equipment base, and the locking device comprises: a door cover locating pin fixed on the side of the door cover, a door cover locating lock ear fixed on the rear door frame of the compression equipment cylinder at a position corresponding to the door cover locating pin, a pair of push rods slidably installed on both sides of the compression equipment cylinder in a vertical direction through at least one limiting groove, a first pivot shaft rotatably connected to the upper end of the push rod, a power device installed on the compression equipment cylinder and hinged to the lower end of the push rod, and a control device electrically connected to the power device and the discharge cylinder. The door cover comprises a connection part rotatably connected to the first pivot axis, the connection part comprises a motion conversion mechanism capable of converting the vertical movement of the push rod into the horizontal movement of the door cover, the door cover positioning lock ear comprises a protrusion extending upward, and the door cover positioning lock ear carries the door cover positioning pin in the closed position of the door cover and abuts against the door cover positioning pin in the horizontal direction by means of the protrusion to limit the movement of the door cover in the horizontal direction; the profile of the protrusion is designed so that the restriction on the horizontal movement of the door cover is gradually released when the door cover moves upward in the vertical direction; the limiting groove is provided with a wear-resistant gasket on the inner side; the power device comprises a hydraulic cylinder; the control device is configured to be able to push the push rod upward in the vertical direction by means of the power device, drive the door cover to move upward, so that the door cover moves away from the compression device cylinder in the horizontal direction under the action of the motion conversion mechanism and the door cover positioning lock ear, so that the door cover is automatically opened when the front end of the compression device base is lifted.

2. The locking device according to claim 1, wherein: The compression device cylinder includes a sealing strip arranged at the outer edge of the rear port, and the sealing strip is in close contact with the door cover when the door cover is in a closed position.

3. The locking device according to claim 1, wherein: The locking device comprises a plurality of door cover positioning pins arranged at intervals in the vertical direction, and a plurality of door cover positioning lock ears arranged at intervals in the vertical direction corresponding to the plurality of door cover positioning pins.

4. The locking device according to claim 1, wherein: The locking device comprises a plurality of limiting grooves arranged at intervals along the vertical direction.

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