CN113003030B

CN113003030B - Hopper assembly and concrete pump truck

Info

Publication number: CN113003030B
Application number: CN202110177110.5A
Authority: CN
Inventors: 亢晨钢; 葛超波; 曹富龙; 许宏志
Original assignee: Xuzhou XCMG Schwing Machinery Co Ltd
Current assignee: Xuzhou XCMG Schwing Machinery Co Ltd
Priority date: 2021-02-07
Filing date: 2021-02-07
Publication date: 2022-08-02
Anticipated expiration: 2041-02-07
Also published as: CN113003030A

Abstract

The invention relates to the technical field of engineering machinery, in particular to a hopper assembly and a concrete pump truck. The hopper subassembly includes: the hopper comprises a hopper body, a hopper cover and a locking mechanism, wherein the locking mechanism comprises a stop piece, a first locking piece and a second locking piece, the stop piece and the first locking piece are respectively arranged on one and the other of the hopper cover and the hopper body, the first locking piece can rotate between a locking position and an unlocking position, and the second locking piece is movably connected to the first locking piece; the hopper assembly is provided with a locking state and an unlocking state, when the hopper assembly is in the locking state, the hopper cover is closed, the first locking piece rotates to a locking position and is combined with the stop piece, and the second locking piece moves to the first position relative to the first locking piece to lock the first locking piece and the stop piece; when the locking mechanism is in an unlocking state, the second locking piece is separated from the stop piece, and the first locking piece rotates to an unlocking position and is separated from the stop piece. Therefore, the risk that the hopper cover shakes due to road jolt and other reasons can be reduced.

Description

Hopper assembly and concrete pump truck

Technical Field

The invention relates to the technical field of engineering machinery, in particular to a hopper assembly and a concrete pump truck.

Background

In concrete pump trucks, a hopper cover is generally arranged on the hopper and can be connected with the hopper in an opening and closing manner so as to shield the concrete in the hopper and prevent the concrete from overflowing or splashing.

Under the driving working condition, the hopper cover is normally closed to prevent the flash problem. However, the traveling road condition of the concrete pump truck is generally poor, and the road surface is bumpy, so that the hopper cover is easy to shake up and down to influence the material shielding effect, and the hopper cover is easy to damage due to the up-and-down shaking to influence the service life.

Disclosure of Invention

The invention aims to solve the technical problems that: the risk that the hopper cover shakes is reduced.

In order to solve the above technical problem, an embodiment of the present invention provides a hopper assembly, including:

a hopper;

the hopper cover is connected to the hopper in an openable and closable manner; and

a locking mechanism including a stopper provided on one of the hopper cover and the hopper, a first locking member provided on the other of the hopper cover and the hopper and rotatable between a locking position and an unlocking position, and a second locking member movably connected to the first locking member;

the hopper assembly is provided with a locking state and an unlocking state, when the hopper assembly is in the locking state, the hopper cover is closed, the first locking piece rotates to a locking position and is combined with the stop piece, the second locking piece moves to the first position relative to the first locking piece, and the first locking piece and the stop piece are locked to lock the hopper and the hopper cover; when being in the unblock state, second locking piece and backstop throw off, and first locking piece rotates to the unblock position, and throw off with the backstop to the realization is to the unblock of hopper and hopper cover.

In some embodiments, the first locking member is provided with a first notch, the stop member is embedded in the first notch in the locking state to realize the combination of the first locking member and the stop member, and the stop member is separated from the first notch in the unlocking state to realize the separation of the first locking member and the stop member.

In some embodiments, the second locking member is provided with a second notch, and the stop member is embedded into the second notch in the locking state, so as to lock the first locking member and the stop member by the second locking member.

In some embodiments, the first locking member is provided with an elongated hole, and the first locking member is slidably connected with the second locking member through the elongated hole.

In some embodiments, the latch mechanism further includes an operating member coupled to the second latch member, the second latch member sliding relative to the first latch member when the operating member is operated.

In some embodiments, the operating member includes a connecting portion and an operating portion, the operating portion is connected to the second lock member through the connecting portion, and the operating portion has an arc-shaped surface.

In some embodiments, the second locking member is slidably coupled to the first locking member via an operating member.

In some embodiments, the locked position is a vertical position; and/or the unlocked position is a horizontal position.

In some embodiments, the first locking member is disposed on the hopper, and the unlocking position is a horizontal position, and the locking mechanism further includes a support member disposed on the hopper and supporting the first locking member when the first locking member rotates to the unlocking position.

The embodiment of the invention also provides a concrete pump truck which comprises the hopper assembly.

In the embodiment of the invention, the locking mechanism can lock the hopper cover and the hopper, so that the hopper cover can be stably kept in a closed state when needed, and the risk of shaking of the hopper cover due to road jolt and other reasons is reduced.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of a hopper assembly in an unlocked state according to an embodiment of the present invention.

Fig. 2 is a schematic diagram illustrating a state of the hopper assembly when the hopper assembly is switched from the unlocked state to the locked state according to the embodiment of the present invention.

FIG. 3 is a schematic view of the hopper assembly in a locked position according to an embodiment of the present invention.

FIG. 4 is a schematic view of the installation of the stopper in the embodiment of the present invention.

Fig. 5 is a perspective view of a locking assembly in an embodiment of the present invention.

Fig. 6 is a schematic view illustrating the installation of the first locking member in the embodiment of the present invention.

FIG. 7 is a schematic view of the second latch member and the operating member mounted thereto in accordance with an embodiment of the present invention.

Fig. 8 is a perspective view of a second locking member according to an embodiment of the invention.

FIG. 9 is a schematic view of the installation of the support member in the embodiment of the present invention.

Description of reference numerals:

10. a hopper assembly;

1. a hopper; 11. connecting holes;

2. a hopper cover; 21. mounting holes;

3. a locking mechanism; 31. a stopper; 32. a locking assembly; 311. a rod portion; 312. a head portion; 313. a stopping table; 33. a first locking member; 331. a first notch; 332. a long hole; 333. a shaft hole; 34. a second lock; 341. a second notch; 342. a through hole; 343. a first portion; 344. a second portion; 35. an operating member; 351. an operation section; 352. a connecting portion; 36. a support member; 361. a first plate portion; 362. a second plate portion; 37. a nut; 38. a gasket; 39. and (4) bolts.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

In the description of the present invention, it should be understood that the terms "first", "second", etc. are used to define the components, and are used only for the convenience of distinguishing the corresponding components, and if not otherwise stated, the terms have no special meaning, and thus, should not be construed as limiting the scope of the present invention.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The concrete pump truck is an engineering machine which utilizes pressure to convey pre-stirred concrete to a certain height and distance along a distribution pipeline, and is widely applied to modern building engineering. Generally, a concrete pump truck comprises a special truck chassis, supporting legs, a rotary base, a pumping unit, a rotary device, a distributing boom system, an electrical system, a hydraulic system and the like. Wherein, the pumping unit comprises parts such as hopper, hopper lid, distributing valve, concrete cylinder, washing tank, advancing device and controlling means. The hopper is used for depositing the concrete. The hopper cover is arranged on the hopper and can be opened and closed relative to the hopper cover so as to open or close the opening of the hopper.

In order to enable the hopper cover to be stably kept in a closed state when needed without shaking back and forth, the embodiment of the invention provides a hopper assembly 10. Fig. 1-9 schematically illustrate the construction of the hopper assembly 10 of the present invention.

Referring to fig. 1-9, in an embodiment of the present invention, a hopper assembly 10 comprises:

a hopper 1;

a hopper cover 2 openably and closably connected to the hopper 1; and

a lock mechanism 3 including a stopper 31, a first lock 33, and a second lock 34, the stopper 31 being provided on one of the hopper cover 2 and the hopper 1, the first lock 33 being provided on the other of the hopper cover 2 and the hopper 1 and being rotatable between a lock position and an unlock position, the second lock 34 being movably connected to the first lock 33;

the hopper assembly 10 has a locking state and an unlocking state, when the hopper assembly is in the locking state, the hopper cover 2 is closed, the first locking piece 33 rotates to the locking position and is combined with the stop piece 31, and the second locking piece 34 moves to the first position relative to the first locking piece 33 to lock the first locking piece 33 and the stop piece 31, so that the hopper 1 and the hopper cover 2 are locked; in the unlocked state, the second lock 34 is disengaged from the stopper 31, and the first lock 33 rotates to the unlocked position to be disengaged from the stopper 31, so that the hopper 1 and the hopper cover 2 are unlocked.

Locking mechanism 3 that sets up can carry out the locking to hopper cover 2 and hopper 1, is fixed in closed position with hopper cover 2, consequently, can reduce hopper cover 2 and come back to the risk of rocking because of reasons such as the road surface jolts, and this is favorable to realizing hopper cover 2 more reliable and stable's effect of hiding, and is favorable to preventing hopper cover 2 and damaging because of rocking, prolongs hopper cover 2's life.

Moreover, based on the locking mechanism 3, the hopper assembly 10 can be switched between the locking state and the unlocking state only by rotating the first locking piece 33 and moving the second locking piece 34, which is convenient and efficient. Specifically, referring to fig. 1 to 3, when the hopper cover 2 needs to be locked, the hopper cover 2 can be locked and fixed only by rotating the first locking member 33 from the unlocking position to the locking position, and then moving the second locking member 34 to the first position relative to the first locking member 33; when the hopper cover 2 needs to be opened, the first locking piece 33 and the stopping piece 31 are unlocked only by moving the second locking piece 34 away from the first position, and then the first locking piece 33 is rotated from the locking position to the unlocking position, so that the hopper cover 2 can be unlocked, and the hopper cover 2 can be opened smoothly.

Meanwhile, the locking mechanism 3 is simple in structure, does not contain a spring inside, is not limited by the effective service life of the spring, and is safe, reliable and long in service life.

Referring to fig. 2-3, in some embodiments, the first locking element 33 is provided with a first indentation 331. The first locking member 33 is coupled to or separated from the stopper 31 by the first notch 331. When the hopper assembly 10 is in a locked state, the stopper 31 is embedded in the first notch 331, so that the first locking piece 33 is combined with the stopper 31; when the hopper assembly 10 is in the unlocked state, the stopper 31 is disengaged from the first notch 331, thereby achieving disengagement of the first locking member 33 from the stopper 31.

Based on the set first notch 331, the first locking member 33 can be naturally combined with the stop member 31 only by rotating to the locking position, and other connecting operations for the first locking member 33 or the stop member 31 are not needed; when the hopper cover 2 needs to be unlocked, the first lock 33 can be directly rotated to the unlocking position by simply unlocking the first lock 33 and the stopper 31 by the second lock 34, and there is no need to perform another separating operation on the first lock 33 and the stopper 31. The whole process is simple and convenient, and efficient locking and unlocking processes are facilitated.

With continued reference to fig. 2-3, in some embodiments, second notch 341 is provided in second latch member 34. The second locking member 34 is engaged with or disengaged from the stopper 31 through the second notch 341, thereby locking or unlocking the stopper 31 and the first locking member 33 engaged with each other. When the hopper assembly 10 is in the locked state, the stop member 31 is inserted into the second notch 341, so as to lock the first locking member 33 and the stop member 31 by the second locking member 34. When the hopper assembly 10 is in the unlocked state, the stopper 31 is separated from the second notch 341, and the stopper 31 no longer locks the first locking member 33 and the stopper 31.

Based on the second notch 341, after the first locking member 33 rotates to the locking position and is combined with the stop member 31, the second locking member 34 can be naturally combined with the stop member 31 only by moving to the first position relative to the first locking member 33, and the stop member 31 and the first locking member 33 are locked, and other connecting operations between the second locking member 34 and the stop member 31 and between the second locking member 34 and the first locking member 33 are not needed in the process; when the hopper assembly 10 needs to be switched from the locking state to the unlocking state, the second locking piece 34 only needs to move in the direction away from the first position, and can be naturally separated from the stop piece 31, so that the stop piece 31 and the first locking piece 33 are unlocked, the first locking piece 33 can be rotated towards the unlocking position, and other separation operations among the second locking piece 34, the stop piece 31 and the first locking piece 33 are not needed in the process. The whole process is simple and convenient, and efficient locking and unlocking processes are facilitated.

The movable connection of the second locking member 34 to the first locking member 33 can be achieved in various ways. For example, in some embodiments, the first locking member 33 is provided with a rail, and the second locking member 34 is slidably connected to the rail, so that the second locking member 34 can slide along the rail, and thus can move relative to the first locking member 33. For another example, referring to fig. 3, in some embodiments, an elongated hole 332 is formed on the first locking member 33, and the first locking member 33 is slidably connected to the second locking member 34 through the elongated hole 332, so that the second locking member 34 slides along the elongated hole 332, and the movement relative to the first locking member 33 can be achieved.

Of the two extreme positions at which the second lock member 34 moves relative to the first lock member 33, the other position other than the first position may be referred to as a second position.

The movement of the second lock member 34 relative to the first lock member 33 may be achieved by directly operating the second lock member 34, or may be achieved by further providing an operating member 35 on the second lock member 34 and operating the operating member 35. For example, referring to fig. 1-3, 5 and 7, in some embodiments, the locking mechanism 3 further includes an operating member 35, the operating member 35 is connected to the second locking member 34, and when the operating member 35 is operated, the second locking member 34 slides relative to the first locking member 33. Thus, the second lock 34 can be moved relative to the first lock 33 by operating the operating element 35, which is more convenient to operate.

Here, referring to fig. 7, in some embodiments, the operation member 35 includes a connecting portion 352 and an operation portion 351, the operation portion 351 is connected with the second lock member 34 through the connecting portion 352, and the operation portion 351 has an arc-shaped surface. In this case, the second lock 34 can be moved by pushing or pulling the operating portion 351. Moreover, the operating part 351 has an arc-shaped surface, so that the operating part is more convenient to grasp, less prone to scratching hands and safer.

With continued reference to FIG. 7, in some embodiments, the second lock 34 is slidably coupled to the first lock 33 via an operating member 35. At this time, the operation member 35 is not only used for being operated by a worker to realize the movement of the second lock 34, but also used for realizing the sliding connection between the second lock 34 and the first lock 33, and as this makes it unnecessary to additionally provide other structures to realize the movable connection between the second lock 34 and the first lock 33, the structure is simplified and becomes more compact.

In the foregoing embodiments, specific positions of the lock position and the unlock position are not particularly limited. For example, the locked position may be, but is not limited to, a vertical position. The unlocked position may be, but is not limited to, a horizontal position. The rotational angle of the first lock 33 between the locked position and the unlocked position may be equal to, less than, or greater than 90 °.

Referring to fig. 3, when the first locking member 33 is disposed on the hopper 1 and the unlocking position is a horizontal position, in some embodiments, the locking mechanism 3 further includes a supporting member 36, and the supporting member 36 is disposed on the hopper 1 and supports the first locking member 33 when the first locking member 33 rotates to the unlocking position. Thus, when the first locking member 33 rotates to the horizontal position, the supporting member 36 can support the first locking member 33, limit the position of the first locking member 33, and prevent the first locking member 33 from continuing to rotate downward, thereby being beneficial to stably keeping the first locking member 33 at the unlocking position.

The embodiments shown in fig. 1-9 will be further described below.

As shown in fig. 1 to 9, in this embodiment, the hopper assembly 10 includes a hopper 1, a hopper cover 2, and a lock mechanism 3.

The hopper 1 is used for storing concrete. The top of the hopper 1 is provided with an opening.

Hopper cover 2 sets up in the top of hopper 1 to with the pin joint of hopper 1, make hopper cover 2 can open or shield the opening through rotating for hopper 1, realize hopper cover 2 in the switching between open mode and closed state.

The locking mechanism 3 is used to implement or release the locking of the hopper 1 and the hopper cover 2, so that the hopper cover 2 can be stably kept in a closed state when the concrete in the hopper 1 needs to be covered, and the hopper cover 2 can be conveniently opened when the concrete needs to be poured into the hopper 1.

The locking mechanism 3 includes a stopper 31 and a locking assembly 32, and the locking assembly 32 includes a first locking member 33, a second locking member 34, an operating member 35, and a receiver 36.

As shown in fig. 1 to 4, in this embodiment, the stopper 31 is fixed to the hopper cover 2 and is used to cooperate with the first locking member 33 and the second locking member 34 to lock the hopper cover 2 in the closed position. In particular, as can be seen in fig. 4, in this embodiment the stop 31 comprises a stem 311 and a head 312. The rod portion 311 is used to connect the head portion 312 and the hopper cover 2, and is used to combine with the first lock 33 and the second lock 34, and to realize the combination of the stopper 31 with the first lock 33 and the second lock 34. The head 312 is connected to one end of the rod 311, and is used for limiting the position of the second locking member 34 after the second locking member 34 is combined with the rod 311. More specifically, the first end of the rod portion 311 is inserted into the mounting hole 21 on the hopper cover 2 and is fixed by the nut 37 and the washer 38, achieving the mounting and fixing of the stopper 31 on the hopper cover 2. A second end of the lever portion 311, which is opposite to the first end, is located outside the hopper cover 2, protruding horizontally outward with respect to the hopper cover 2. The head 312 is connected to the second end of the stem 311 and has a larger cross-sectional area than the stem 311.

In addition, as shown in fig. 4, in this embodiment, the stopper 31 further includes a stop table 313, and the stop table 313 is disposed on the rod portion 311, is located between the first end and the second end of the rod portion 311, and protrudes from the rod portion 311 to the radial outside of the rod portion 311. The stopper 313 prevents the stem 311 from being excessively inserted by abutting on the outer surface of the hopper cover 2 during the insertion of the stem 311 into the mounting hole.

The first locking member 33 is rotatably provided on the hopper 1, and is engaged with and disengaged from the stopper 31 by rotating between a locking position and an unlocking position. Wherein, as shown in fig. 1-3 and 5-7, in this embodiment, the first locking member 33 is plate-shaped and is rotatably coupled to the hopper 1 by means of bolts 39. Specifically, the hopper 1 is provided with a connecting hole 11, the first locking member 33 is correspondingly provided with a shaft hole 333, and the bolt 39 passes through the shaft hole 333 and the connecting hole 11, so that the first locking member 3 can rotate between the locking position and the unlocking position by rotating around the axis of the bolt 39. The bolt 39 and the hopper 1 are locked by the nut 37 and the washer 38, and the bolt 39 and the hopper 1 are fixedly connected. The bolt 39 is retained against the first lock member 33 by a nut 37 and a washer 38 to prevent axial play of the first lock member 33. Wherein the locked position is a vertical position, as shown in fig. 3. As shown in fig. 1, the unlocked position is a horizontal position.

In addition, as shown in fig. 1 to 3 and fig. 5 to 7, in this embodiment, the first locking member 33 is provided with a first notch 331 and an elongated hole 332. The first notch 331 is configured to engage with the rod portion 311 of the stop member 31 when the first locking member 33 rotates to the locking position, and is recessed from a first side of the first locking member 33 facing the stop member 31 to another side opposite to the first side in the locking position, so that the rod portion 311 can be gradually inserted into the first notch 331 during the rotation of the first locking member 33 to the locking position, and can be just inserted into position when the first locking member 33 rotates to the locking position, and abut against a closed end of the first notch 331 opposite to the open end, thereby achieving smooth combination of the first locking member 33 and the stop member 31. The elongated hole 332 is disposed on a side of the first notch 331 away from the axle hole 333, and is used for connecting with the second lock member 34, so as to realize a relatively movable connection between the second lock member 34 and the first lock member 33, and guide the second lock member 34 to move on the first lock member 33 between the first position and the second position. The end of the elongated hole 332 close to the axial hole 333 and the end far from the axial hole 333 correspond to the first position and the second position of the second lock member 34, respectively. When the first locking member 33 is rotated to the locking position, the elongated hole 332 extends in the vertical direction, so that the second locking member 34 falls to the first position under the action of gravity, and locks the stopper 31 and the first locking member 33. The elongated hole 332 may be an oblong hole.

The second lock member 34 is slidably attached to the first lock member 33, and by sliding between a first position and a second position with respect to the first lock member 33, locks or unlocks the first lock member 33 and the stopper member 31 which are coupled to each other. As shown in fig. 1-3, 5, and 7-8, in this embodiment, the second locking member 34 is in the form of a block with a hollow interior. The first lock 33 passes through the inside of the second lock 34 so that the second lock 34 has a first portion 343 and a second portion 344 located on both sides in the thickness direction of the first lock 33. The second locking member 34 is provided with a second notch 341 and a through hole 342. The second notch 341 is recessed from a side of the second locking member 34 facing the shaft hole 333 to a side away from the shaft hole 333, and is configured to engage with the stopper 31 when the first locking member 33 rotates to the locking position and the second locking member 34 slides to the first position, so as to lock the first locking member 33 and the stopper 31. The maximum width of the second gap 341 is smaller than the diameter of the head 312 of the stopper 31, so that after the second lock member 34 falls to the first position, the head 312 acts as an additional stopper for the second lock member 34, further preventing the second lock member 34 from disengaging from the stopper 31 in a direction away from the hopper cover. The through hole 342 penetrates the second lock member 34 in the thickness direction (i.e., penetrates the first portion 343 and the second portion 344) and is used for cooperating with the operating member 35 to realize the sliding connection of the second lock member 34 on the first lock member 33. The through hole 342 is located on a side of the second gap 341 away from the axial hole 333. In this way, after the second lock 34 rotates to the lock position at the vertical position along with the first lock 33, it can fall to the first position by gravity, and reliably engage with the stopper 31, thereby smoothly locking the stopper 31 and the first lock 33.

The operating member 35 connects the first lock member 33 and the second lock member 34 to achieve a sliding connection therebetween. As shown in fig. 1 to 3, 5, and 7, in this embodiment, the operating member 35 includes an operating portion 351 and a connecting portion 352. The connecting portion 352 passes through the portion of the through hole 342 on the first portion, the elongated hole 332 and the portion of the through hole 342 on the second portion, and is fixed by the nut 37 and the washer 38, so that the connecting portion 352 is fixedly connected to the second locking member 34 and movably disposed in the elongated hole 332, and the connecting portion 352 slides along the elongated hole 332 to move the second locking member 34 between the first position and the second position relative to the first locking member 33. The operating portion 351 is connected to an end of the connecting portion 352 remote from the hopper 1 and is substantially spherical, for example, in a full sphere or a hemisphere shape, for a worker to grasp. In use, a worker holds the operating portion 351 and pulls the operating member 35 to move the second locking member 34 along the elongated hole 332 between the first position and the second position. The operation portion 351 is spherical, so that the hand can be conveniently gripped, the surface is smooth, and the hand is not easily scratched.

The support member 36 is disposed on the hopper 1 and configured to support the first locking member 33 rotated to the unlocking position. As shown in fig. 1 to 3, 5 and 9, in this embodiment, the support member 36 is fixed to the hopper 1 and includes a first plate portion 361 and a second plate portion 362. The first plate portion 361 extends vertically and is fixedly connected to the hopper 1 by means of a nut 37 and a washer 38, so as to fixedly connect the support 36 to the hopper 1. The second plate portion 362 is connected to the bottom end of the first plate portion 361 and is bent at an angle of approximately 90 ° with respect to the first plate portion 361, so that the supporting member 36 is approximately L-shaped. The second plate portion 362 is located below the first lock member 33 in the unlock position, and is used for supporting the first lock member 33 when the first lock member 33 rotates to the unlock position which is a horizontal position, so that the first lock member 33 can be stably maintained in the unlock position without further downward rotation.

Based on the foregoing arrangement, in the embodiment shown in fig. 1-9, the operation of the locking mechanism 3 can be as follows:

(1) when it is not necessary to lock the hopper cover 2, for example, when the hopper cover 2 is in an open state, as shown in fig. 1, the first lock 33 is held in a horizontal position and is held by the holder 36, and at this time, the second lock 34 may be in a first position, a second position, or any position between the first position and the second position with respect to the first lock 33;

(2) when the hopper cover 2 is closed and the hopper cover 2 needs to be locked, for example, in a driving condition, the first locking member 33 may be rotated counterclockwise from the horizontal position to the vertical position to insert the stop member 31 into the first notch 331, in this process, in order to prevent the second locking member 34 from blocking the engagement between the stop member 31 and the first notch 331 when the first locking member 33 is rotated to the vertical position, the operator may pull the operating member 35 before the first locking member 33 is rotated to the vertical position to make the second locking member 34 not be in the first position, for example, to make the second locking member 34 be kept in the second position (as shown in fig. 2), and then, after the first locking member 33 is rotated to the vertical position and the first notch 331 is engaged in the first notch 331, the operator may release the operating member 35, so that the second locking member 34 can fall to the first position under the action of gravity (see the change process shown in fig. 2 to 3), the stopper 31 is embedded into the second notch 341, so that the second locking piece 34 locks the stopper 31 and the first locking piece 33, the hopper cover 2 is locked in a closed state, and the hopper cover 2 is fixed at a closed position;

(3) when the hopper cover 2 needs to be switched from the locking state to the unlocking state, for example, when concrete needs to be poured into the hopper 1, the operating member 35 may be pulled upward first to separate the second locking member 34 from the first position, and the second notch 341 is separated from the stop member 31, at this time, the locking action of the second locking member 34 on the stop member 31 and the first locking member 33 is released, and the first locking member 33 may rotate; thereafter, the first lock 33 is rotated clockwise downward to return the first lock 33 to the horizontal position, and since the first notch 331 is disengaged from the stopper 31 at this time, the first lock 33 is not connected to the stopper 31, and since the second lock 34 is also disengaged from the stopper 31, the locking action of the lock mechanism 3 on the hopper cover 2 is released, and the hopper cover 2 can be freely opened and closed.

It can be known from the above-mentioned synthesis that locking mechanical system 3 that this embodiment provided can realize when needs reliably locking hopper cover 2 on hopper 1, prevents that hopper cover 2 from opening or taking place unexpected rocking by accident to, convenient to use, simple structure does not contain the spring, need not to receive the restriction of spring limited life.

The above description is only exemplary of the present invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A hopper assembly (10), comprising:

a hopper (1);

a hopper cover (2) connected to the hopper (1) in an openable manner; and

a lock mechanism (3) including a stopper (31), a first lock (33) and a second lock (34), the stopper (31) being provided on one of the hopper cover (2) and the hopper (1), the first lock (33) being provided on the other of the hopper cover (2) and the hopper (1) and being rotatable between a lock position and an unlock position, the second lock (34) being movably connected to the first lock (33);

wherein the hopper assembly (10) has a locked state in which the hopper cover (2) is closed, the first locking member (33) rotates to a locked position in engagement with the stop member (31), and the second locking member (34) moves to a first position relative to the first locking member (33) to lock the first locking member (33) and the stop member (31) to effect locking of the hopper (1) and the hopper cover (2); when the hopper cover is in the unlocking state, the second locking piece (34) is separated from the stop piece (31), and the first locking piece (33) rotates to the unlocking position and is separated from the stop piece (31) so as to unlock the hopper (1) and the hopper cover (2).

2. The hopper assembly (10) according to claim 1, characterized in that said first locking member (33) is provided with a first notch (331), said stop member (31) being inserted in said first notch (331) in said locked condition to enable engagement of said first locking member (33) with said stop member (31), and said stop member (31) being disengaged from said first notch (331) in said unlocked condition to enable disengagement of said first locking member (33) from said stop member (31).

3. The hopper assembly (10) according to claim 1, wherein a second notch (341) is provided on the second locking member (34), and in the locked state, the stop member (31) is inserted into the second notch (341) to lock the first locking member (33) and the stop member (31) by the second locking member (34).

4. The hopper assembly (10) according to claim 1, wherein the first locking member (33) is provided with an elongated hole (332), and the first locking member (33) is slidably connected with the second locking member (34) through the elongated hole (332).

5. The hopper assembly (10) according to any one of claims 1 to 4, wherein said locking mechanism (3) further comprises an operating member (35), said operating member (35) being connected to said second locking member (34), said second locking member (34) sliding relative to said first locking member (33) when said operating member (35) is operated.

6. The hopper assembly (10) according to claim 5, wherein the operating member (35) comprises a connecting portion (352) and an operating portion (351), the operating portion (351) being connected with the second locking member (34) through the connecting portion (352), and the operating portion (351) having an arc-shaped surface.

7. The hopper assembly (10) according to claim 5, characterized in that said second locking member (34) is slidingly associated with said first locking member (33) through said operating member (35).

8. The hopper assembly (10) of claim 1 wherein said locked position is a vertical position; and/or the unlocked position is a horizontal position.

9. The hopper assembly (10) according to claim 8, wherein said first locking member (33) is arranged on said hopper (1) and said unlocking position is a horizontal position, said locking mechanism (3) further comprising a bearing member (36), said bearing member (36) being arranged on said hopper (1) and bearing said first locking member (33) when said first locking member (33) is rotated to said unlocking position.

10. A concrete pump truck characterized by comprising a hopper assembly (10) according to any one of claims 1 to 9.