Casing device and construction machinery

Abstract

The present invention relates to the technical field of construction machinery, and particularly relates to a casing device and a construction machinery. The casing device includes: a mounting seat, a first side cylinder and a second side cylinder, a driving part and a transmission mechanism. The first side cylinder and the second side cylinder are arranged oppositely and are both rotatably connected to the mounting seat; the driving part is arranged between the first side cylinder and the second side cylinder, one end of the driving part is rotatably connected to the mounting seat, and the other end of the driving part is rotatably connected to the side of the first side cylinder facing the second side cylinder; the transmission mechanism is fixedly connected to one end of the driving part and is connected to the second side cylinder. When the driving part drives the first side cylinder to rotate relative to the mounting seat, the driving part drives the second side cylinder to rotate relative to the mounting seat through the transmission mechanism. The driving part and the transmission mechanism are located inside the casing device, are not easily damaged by external object impacts, reduce the maintenance cost, and are beneficial to extending the service life.

Description

Technical Field

[0001] The present invention relates to the technical field of construction machinery, and particularly relates to a casing device and a construction machinery. Background Art

[0002] For a long auger drill, the casing device is an essential component. The casing device is arranged at the lower part of the mast, plays a guiding and supporting role for the auger rod to ensure the perpendicularity of the drill rod and control the deviation degree in the depth direction of the pile foundation hole. At the same time, the casing device needs to be able to open so that the power head can continue to drill. The existing casing devices usually have two oil cylinders arranged on the outer side of the casing, and the two oil cylinders are used to control the opening and closing of the left and right casings respectively.

[0003] However, due to the complex on-site environment, the oil cylinders are easily damaged by external objects. Therefore, the casing device needs to be frequently repaired and replaced, increasing the use cost of the equipment. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the existing casing device is easily damaged, so as to provide a casing device and a construction machinery that are not easily damaged.

[0005] To solve the above problems, the present invention provides a casing device, including: a mounting seat; a first side cylinder and a second side cylinder, which are oppositely arranged and both rotatably connected to the mounting seat; a driving part, arranged between the first side cylinder and the second side cylinder, one end of the driving part is rotatably connected to the mounting seat, and the other end of the driving part is rotatably connected to one side of the first side cylinder facing the second side cylinder; a transmission mechanism, fixedly connected to one end of the driving part and connected to the second side cylinder. When the driving part drives the first side cylinder to rotate relative to the mounting seat, the driving part drives the second side cylinder to rotate relative to the mounting seat through the transmission mechanism.

[0006] Optionally, the transmission mechanism includes a first rotating part, a second rotating part and a connecting part; the first rotating part rotates coaxially with one end of the driving part; the second rotating part is rotatably connected to the mounting seat and cooperates with the first rotating part, and the first rotating part drives the second rotating part to rotate; one end of the connecting part is fixedly connected to the second rotating part and the other end is rotatably connected to the second side cylinder to push the second side cylinder to rotate relative to the mounting seat; when the first side cylinder and the second side cylinder approach each other, the casing device is in a closed state; when the first side cylinder and the second side cylinder move away from each other, the casing device is in an open state.

[0007] Optionally, the connecting part includes: a rocker and a connecting rod, one end of the rocker is rotatably connected to one end of the connecting rod, the other end of the rocker is fixedly connected to the second rotating part, and the other end of the connecting rod is rotatably connected to the second side cylinder.

[0008] Optionally, both the first side cylinder and the second side cylinder have a closed position where they are close to each other and an open position where they are far from each other. While the driving part drives the first side cylinder to switch between the closed position and the open position, it drives the second side cylinder to switch between the closed position and the open position through a transmission mechanism. When both the first side cylinder and the second side cylinder are in the closed position, the rocker and the connecting rod are arranged at an angle; when both the first side cylinder and the second side cylinder are in the open position, the rocker and the connecting rod are on the same straight line to lock the second side cylinder.

[0009] Optionally, the first rotating part is a first gear, and the second rotating part is a second gear. The first gear meshes with the second gear so that the rotation direction of the second gear is opposite to that of the first gear.

[0010] Optionally, when the casing device switches from the closed state to the open state, the angle turned by the driving part is the first angle, and the angle turned by the rocker is the second angle; the ratio of the number of teeth of the first gear to the number of teeth of the second gear is equal to the ratio of the second angle to the first angle.

[0011] Optionally, the first side cylinder and the second side cylinder are symmetrically arranged with respect to the symmetry line. When the casing device is in the closed state, the rocker is parallel to the driving part and arranged at an angle with the symmetry line; when the casing device switches from the closed state to the open state, the angle turned by the rocker is three times the angle turned by the driving part.

[0012] Optionally, one end of the driving part is configured as a mounting shaft. The mounting shaft is rotatably connected to the mounting seat. The first rotating part is fixedly sleeved on the mounting shaft, and the mounting shaft drives the first rotating part to rotate relative to the mounting seat.

[0013] Optionally, the driving part is a telescopic cylinder. The telescopic drive of the telescopic cylinder drives the first side cylinder to rotate relative to the mounting seat. When the telescopic cylinder extends, the first side cylinder and the second side cylinder move away from each other; when the telescopic cylinder contracts, the first side cylinder and the second side cylinder move closer to each other.

[0014] The present invention also provides a construction machinery, which includes: the above-mentioned casing device.

[0015] The present invention has the following advantages:

[0016] 1. By arranging a driving part between the first side cylinder and the second side cylinder, with the driving part located inside the casing device. At the same time, the transmission mechanism is fixedly connected to one end of the driving part and connected to the second side cylinder, so that the transmission mechanism is also located inside the casing device. Therefore, the driving part and the transmission mechanism are not easily damaged by external object impacts, reducing the maintenance cost and facilitating the extension of the service life. Moreover, by the combined action of the driving part and the transmission mechanism to drive the first side cylinder and the second side cylinder to act, only one driving component, i.e., the driving part, is needed to drive the first side cylinder to act and at the same time drive the second side cylinder to act through the transmission mechanism. Compared with the traditional method of arranging two driving components to drive the first side cylinder and the second side cylinder respectively, the number of driving components is reduced, the synchronization of the actions of the first side cylinder and the second side cylinder is improved. And as a mechanical device, the transmission mechanism will not have problems such as oil leakage due to the damage of the sealing ring. It has higher reliability than driving components such as hydraulic cylinders, reducing the production cost of the casing device, improving the use reliability of the casing device, reducing the maintenance and replacement frequency of the casing device, and thus improving the stability and reliability of the whole machine and reducing the use cost of the whole machine.

[0017] 2. By arranging a second rotating part to cooperate with the first driving part, driving the second rotating part to rotate through the first rotating part, and then driving one end of the connecting part fixedly connected thereto to rotate through the rotation of the second rotating part, so as to drive the second side cylinder rotatably connected to the other end of the connecting part to act through the rotation of the connecting part relative to the mounting seat, realizing the rotation of the second side cylinder relative to the mounting seat, that is, realizing the synchronous action of the second side cylinder and the first side cylinder. The structure is simple, reliable and low-cost.

[0018] 3. By arranging the other end of the rocker to be fixedly connected to the second rotating part, realizing the rotation of the rocker relative to the mounting seat driven by the second rotating part; by arranging the connecting part to include a rocker and a connecting rod rotatably connected, the rocker, the connecting rod, the second side cylinder and the mounting seat form a four-bar linkage mechanism. When the connecting rod rotates relative to the rocker, the distance between the hinge point of the second rotating part and the mounting seat and the hinge point of the connecting rod and the second side cylinder changes, thereby driving the second side cylinder to rotate around the second hinge axis. The structure is reliable and low-cost.

[0019] 4. When both the first side cylinder and the second side cylinder are in the closed position, the rocker and the connecting rod are arranged at an angle, and the distance between the end of the rocker away from the connecting rod and the end of the connecting rod away from the rocker is less than the sum of the lengths of the rocker and the connecting rod, so as to provide a margin for driving the second side cylinder to rotate; when both the first side cylinder and the second side cylinder are in the open position, the rocker and the connecting rod are on the same straight line, and the distance between the end of the rocker away from the connecting rod and the end of the connecting rod away from the rocker is equal to the sum of the lengths of the rocker and the connecting rod. The second side cylinder reaches the limit position of rotation, and the four-bar linkage is in the dead point position to lock the second side cylinder. By using the dead point locking principle of the four-bar linkage, the position of the second side cylinder will not be changed passively. Furthermore, through the cooperation of the driving part and the transmission mechanism, the position of the first side cylinder is also locked, increasing the stability and safety of the device. Description of the Drawings

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 Shows a schematic structural diagram of the casing device according to an embodiment of the present invention when in the closed state;

[0022] Figure 2 Shows Figure 1 A partial enlarged schematic view of part A of the casing device;

[0023] Figure 3 Shows Figure 1 A schematic structural diagram of the casing device when in the open state.

[0024] Description of the Reference Numerals:

[0025] 11. First side cylinder; 12. Second side cylinder; 20. Mounting seat; 30. Driving part; 31. First rotating part; 41. Second rotating part; 42. Rocker; 43. Connecting rod; 50. Symmetry line. Detailed Embodiments

[0026] The following will clearly and completely describe the technical solutions of the present invention with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0027] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] As Figures 1 to 3 shown, the casing device of this embodiment includes: a mounting base 20, a first side cylinder 11 and a second side cylinder 12, a driving part 30 and a transmission mechanism. The first side cylinder 11 and the second side cylinder 12 are arranged oppositely and are both rotatably connected to the mounting base 20; the driving part 30 is arranged between the first side cylinder 11 and the second side cylinder 12. One end of the driving part 30 is rotatably connected to the mounting base 20, and the other end of the driving part 30 is rotatably connected to the side of the first side cylinder 11 facing the second side cylinder 12; the transmission mechanism is fixedly connected to one end of the driving part 30 and is connected to the second side cylinder 12. When the driving part 30 drives the first side cylinder 11 to rotate relative to the mounting base 20, the driving part 30 drives the second side cylinder 12 to rotate relative to the mounting base 20 through the transmission mechanism. Among them, the other end of the driving part 30 refers to the end of the driving part 30 far from the mounting base 20; the end of the transmission mechanism fixedly connected to the driving part 30 is the end where the driving part 30 is connected to the mounting base 20. The first side cylinder 11 is rotatably connected to the mounting base 20 through a first hinge shaft; the second side cylinder 12 is rotatably connected to the mounting base 20 through a second hinge shaft.

[0031] In the casing device of the present embodiment, the driving part 30 is arranged between the first side tube 11 and the second side tube 12, so that the driving part 30 is located inside the casing device. At the same time, the transmission mechanism is fixedly connected to one end of the driving part 30 and is connected to the second side tube 12, so that the transmission mechanism is also located inside the casing device. Therefore, the driving part 30 and the transmission mechanism are not easily damaged by the impact of foreign objects, which reduces the maintenance cost and is conducive to prolonging the service life. In addition, the driving part 30 and the transmission mechanism work together to drive the first side tube 11 and the second side tube 12 to move, and only one driving component of the driving part 30 is provided to realize that the driving part 30 drives the first side tube 11 and the second side tube 12 to move. When the first side tube 11 moves, the second side tube 12 is driven to move through the transmission mechanism. Compared with the traditional method of setting two driving components to drive the first side tube 11 and the second side tube respectively, the number of driving components is reduced, and the synchronization of the first side tube 11 and the second side tube 12 is improved. In addition, the transmission mechanism is a mechanical device, and the mechanical device will not have problems such as oil leakage due to damage to the sealing ring. It has higher reliability than driving components such as hydraulic cylinders, reduces the production cost of the casing device, improves the use reliability of the casing device, reduces the maintenance and replacement frequency of the casing device, thereby improving the stability and reliability of the whole machine, and reducing the use cost of the whole machine.

[0032] It should be noted that the first side tube 11 and the second side tube 12 are arranged opposite to each other, and both of them have a closed position close to each other and an open position away from each other. When both of them are in the closed position, the casing device is in a closed state, and a circular clearance space is formed between the first side tube 11 and the second side tube 12. The auger rod is located in the clearance space, and the first side tube 11 and the second side tube 12 clamp the auger rod; and when both of them are in the open position, the casing device is in an open state, and the first side tube 11 and the second side tube 12 release the auger rod, so that the auger rod can rotate and work. The casing device can be used on a rotary drilling rig to provide guidance and support for the auger rod. The casing device is arranged at the lower part of the mast, and the mounting seat 20 is arranged on the mast to achieve the connection between the casing device and the mast.

[0033] In this embodiment, the transmission mechanism includes a first rotating part 31, a second rotating part 41 and a connecting part. One end of the first rotating part 31 rotates coaxially with one end of the driving part 30. The second rotating part 41 is rotatably connected to the mounting seat 20 and cooperates with the first rotating part 31, and the first rotating part 31 drives the second rotating part 41 to rotate. One end of the connecting part is fixedly connected to the second rotating part 41 and the other end is rotatably connected to the second side cylinder 12 to push the second side cylinder 12 to rotate relative to the mounting seat 20. When the first side cylinder 11 and the second side cylinder 12 approach each other, the guard cylinder device is in a closed state. When the first side cylinder 11 and the second side cylinder 12 move away from each other, the guard cylinder device is in an open state. Herein, one end of the driving part 30 refers to the end where the driving part 30 is connected to the mounting seat 20, and the coaxial rotation of the first rotating part 31 and one end of the driving part 30 enables the first rotating part 31 to rotate relative to the mounting seat 20. By arranging the second rotating part 41 to cooperate with the first rotating part 31, the first rotating part 31 drives the second rotating part 41 to rotate, and then the rotation of the second rotating part 41 drives one end of the connecting part fixedly connected thereto to rotate, so as to drive the second side cylinder 12 rotatably connected to the other end of the connecting part to move relative to the mounting seat 20, realizing the rotation of the second side cylinder 12 relative to the mounting seat 20, that is, realizing the synchronous movement of the second side cylinder 12 and the first side cylinder 11. The structure is simple and reliable and the cost is low.

[0034] In this embodiment, the connecting part includes a rocker 42 and a connecting rod 43. One end of the rocker 42 is rotatably connected to one end of the connecting rod 43, the other end of the rocker 42 is fixedly connected to the second rotating part 41, and the other end of the connecting rod 43 is rotatably connected to the second side cylinder 12. Herein, the other end of the rocker 42 refers to the end of the rocker 42 far from the connection with the connecting rod 43, and the other end of the connecting rod 43 refers to the end of the connecting rod 43 far from the connection with the rocker 42. By arranging the other end of the rocker 42 to be fixedly connected to the second rotating part 41, the rocker 42 is driven by the second rotating part 41 to rotate relative to the mounting seat 20. By arranging the connecting part to include the rocker 42 and the connecting rod 43 which are rotatably connected, the rocker 42, the connecting rod 43, the second side cylinder 12 and the mounting seat 20 form a four-bar linkage mechanism. When the connecting rod 43 and the rocker 42 rotate relative to each other, the distance between the hinge point of the second rotating part 41 and the mounting seat 20 and the hinge point of the connecting rod 43 and the second side cylinder 12 changes, so as to push the second side cylinder 12 to rotate around the second hinge axis. The structure is reliable and the cost is low.

[0035] In this embodiment, both the first side cylinder 11 and the second side cylinder 12 have a closed position close to each other and an open position far from each other. While the driving part 30 drives the first side cylinder 11 to switch between the closed position and the open position, it drives the second side cylinder 12 to switch between the closed position and the open position through a transmission mechanism. Thus, the casing device switches between the closed state and the open state. Only by setting one driving part 30 can the synchronous movement of the second side cylinder 12 and the first side cylinder 11 be achieved. The number of driving components is small, and the synchronization between the second side cylinder 12 and the first side cylinder 11 is high, effectively avoiding the situation where only one side cylinder moves when two driving parts are traditionally used to drive two side cylinders respectively, thereby improving the stability and reliability of the device. When both the first side cylinder 11 and the second side cylinder 12 are in the closed position, the rocker 42 and the connecting rod 43 are arranged at an angle, and the distance between the end of the rocker 42 far from the connecting rod 43 and the end of the connecting rod 43 far from the rocker 42 is less than the sum of the lengths of the rocker 42 and the connecting rod 43, so as to provide a margin for pushing the second side cylinder 12 to rotate. When both the first side cylinder 11 and the second side cylinder 12 are in the open position, the rocker 42 and the connecting rod 43 are on the same straight line, and the distance between the end of the rocker 42 far from the connecting rod 43 and the end of the connecting rod 43 far from the rocker 42 is equal to the sum of the lengths of the rocker 42 and the connecting rod 43. The second side cylinder 12 reaches the limit position of rotation. Due to the characteristics of the four-bar linkage itself, the rocker 42 and the connecting rod 43 on the same straight line make the four-bar linkage in the dead center position. At this time, when the second side cylinder 12 receives an external force from the outside of the second side cylinder 12 towards the direction of the connecting rod 43, due to the locking effect of the four-bar linkage, the second side cylinder 12 will not rotate towards the closed position due to the external force. Using the dead center locking principle of the four-bar linkage, the position of the second side cylinder 12 will not be changed passively, so as to lock the second side cylinder 12. Furthermore, through the cooperation of the driving part 30 and the transmission mechanism, the position of the first side cylinder 11 is also locked, increasing the stability and safety of the device. It should be noted that the locking function of the four-bar linkage is used to protect the second side cylinder 12 from forcibly rotating towards the closed position by external forces, but it does not affect the rocker 42 driving the second side cylinder 12 to switch to the closed position by its own rotation. That is, when it is necessary to switch the casing device from the open state to the closed state, the rocker 42 is driven to rotate back through the transmission mechanism, and then the second side cylinder 12 is driven to switch to the closed position through the four-bar linkage. At the same time, the first side cylinder 11 is switched to the closed position under the drive of the driving part 30, realizing the switching of the casing device to the closed state.

[0036] In this embodiment, the first rotating part 31 is a first gear, and the second rotating part 41 is a second gear. The first gear and the second gear are externally meshed so that the rotation directions of the second gear and the first gear are opposite, thereby driving the second side cylinder 12 and the first side cylinder 11 to move in opposite directions, that is, driving the first side cylinder 11 and the second side cylinder 12 to switch to the closed position or the open position simultaneously. The gear structure is stable, the transmission is reliable and the cost is low. The rotation center of the second gear and the rotation center of the first gear are symmetrically arranged with respect to the symmetry line 50, which is convenient for the first side cylinder 11 and the second side cylinder 12 to rotate the same angle relative to the mounting base 20, improving the synchronization of the movement of the first side cylinder 11 and the second side cylinder 12.

[0037] In this embodiment, when the casing device switches from the closed state to the open state, the angle turned by the driving part 30 is the first angle, and the angle turned by the rocker 42 is the second angle; the ratio of the number of teeth of the first gear to the number of teeth of the second gear is equal to the ratio of the second angle to the first angle. Specifically, the relationship between the number of teeth z1 of the first gear and the number of teeth z2 of the second gear satisfies: z1 / z2 = θ2 / θ1, where θ1 is the angle turned by the driving part 30 when the casing device switches from the closed state to the open state; θ2 is the angle turned by the rocker 42 when the casing device switches from the closed state to the open state. Calculating the number of teeth z1 of the first gear and the number of teeth z2 of the second gear according to the relation z1 / z2 = θ2 / θ1 improves the accuracy of the device and further ensures the synchronous movement of the first side cylinder 11 and the second side cylinder 12.

[0038] In this embodiment, the first side cylinder 11 and the second side cylinder 12 are symmetrically arranged with respect to the symmetry line 50. When the casing device is in the closed state, the rocker 42 is parallel to the driving part 30 and is arranged at an angle with the symmetry line 50. Both the rocker 42 and the driving part 30 deviate from the symmetry line 50 towards the side of the first side cylinder 11; when the casing device switches from the closed state to the open state, the angle θ2 turned by the rocker 42 is 3 times the angle θ1 turned by the driving part 30. Specifically, as shown in Figure 3 When the first side cylinder 11 and the second side cylinder 12 are fully opened, θ1 is 22°, and θ2 is 66°. At this time, the distance between the first side cylinder 11 and the second side cylinder 12 is reasonable, which can ensure the rotation of the spiral drill bit and also play a certain protective role.

[0039] It can be understood that as an alternative embodiment, the transmission mechanism may not be provided with a connecting portion composed of the rocker 42 and the connecting rod 43. The transmission mechanism includes a first rotating portion 31 and a second rotating portion 41. The first rotating portion 31 is a first gear, and the second rotating portion 41 is a second gear. A third gear is fixedly sleeved on the second hinge shaft, and the second gear is directly engaged with the third gear. The second gear drives the second hinge shaft to rotate through the third gear, and the rotation of the second side cylinder 12 relative to the mounting seat 20 can also be realized. Among them, according to the distance between the second gear and the third gear in the actual situation, when the second gear and the third gear cannot be directly meshed, an appropriate number of gears can be provided between the second gear and the third gear to realize the transmission between the second gear and the third gear, and the rotation of the second side cylinder 12 relative to the mounting seat 20 can also be realized through the transmission mechanism.

[0040] In this embodiment, one end of the driving portion 30 is configured as a mounting shaft, and the mounting shaft is rotatably connected to the mounting seat 20, so as to realize the rotatable connection between the driving portion 30 and the mounting seat 20. The first rotating portion 31 is fixedly sleeved on the mounting shaft, and the mounting shaft drives the first rotating portion 31 to rotate relative to the mounting seat 20, so as to realize the driving portion 30 driving the first rotating portion 31 to rotate relative to the mounting seat 20, with a simple structure and good stability.

[0041] In this embodiment, the driving portion 30 is a telescopic cylinder, and the telescopic driving of the telescopic cylinder drives the first side cylinder 11 to rotate relative to the mounting seat 20. When the telescopic cylinder extends, the first side cylinder 11 and the second side cylinder 12 move away from each other; and when the telescopic cylinder contracts, the first side cylinder 11 and the second side cylinder 12 move closer to each other. When the first side cylinder 11 and the second side cylinder 12 are in the closed position, the cylinder rod of the telescopic cylinder is in the contracted position and is not easily polluted by environmental dust. Preferably, the telescopic cylinder is a telescopic oil cylinder or a telescopic air cylinder. Both the telescopic oil cylinder and the telescopic air cylinder are relatively common, with mature technologies, good driving force and high stability.

[0042] The working process of the casing device is as follows:

[0043] First, use the driving portion 30 to drive the first side cylinder 11 to open. During the opening process of the first side cylinder 11, the mounting shaft of the driving portion 30 rotates;

[0044] A first gear is installed on the mounting shaft of the driving portion 30. The first gear rotates and drives the second gear to rotate in the reverse direction by a certain angle;

[0045] The rotation of the second gear drives the rocker 42 of the transmission mechanism to rotate, and the rotation of the rocker 42 pushes the connecting rod 43 to move.

[0046] The connecting rod 43 is connected to the second side cylinder 12, and the connecting rod 43 pushes the second side cylinder 12 to rotate;

[0047] When the rocker 42 and the connecting rod 43 are collinear, the limit position where the first side cylinder 11 and the second side cylinder 12 are opened is reached. The four-bar linkage is in the dead center position, and the position of the protective cylinder is locked.

[0048] The present invention also provides a construction machinery, which includes: the above-mentioned protective cylinder device.

[0049] In this embodiment, the construction machinery is a rotary drilling rig.

[0050] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0051] 1. The driving part 30 and the four-bar linkage are arranged inside the protective cylinder and are not easily damaged by external object impacts.

[0052] 2. A single driving part 30 is used to drive the first side cylinder 11 to open, and the second side cylinder 12 is synchronously driven to open through the cooperation of the driving part 30 and the transmission mechanism. The number of driving components is small and the synchronism is high.

[0053] 3. Gears are used to make the driving part 30 and the rocker 42 rotate in opposite directions, and large and small gears are used to match the rotation angles of the driving part 30 and the rocker 42. The structure is reasonable and the synchronism is good.

[0054] 4. The four-bar linkage moves to the dead center position to lock the first side cylinder 11 and the second side cylinder 12, preventing the side cylinders from rotating and improving the safety of the device.

[0055] Obviously, the above embodiments are only examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A casing device, characterized in that, Comprising: A mounting base (20); A first side cylinder (11) and a second side cylinder (12), which are oppositely arranged and are both rotatably connected to the mounting base (20); A driving part (30), arranged between the first side cylinder (11) and the second side cylinder (12), one end of the driving part (30) is rotatably connected to the mounting base (20), and the other end of the driving part (30) is rotatably connected to the side of the first side cylinder (11) facing the second side cylinder (12); A transmission mechanism, fixedly connected to one end of the driving part (30) and connected to the second side cylinder (12). When the driving part (30) drives the first side cylinder (11) to rotate relative to the mounting base (20), the driving part (30) drives the second side cylinder (12) to rotate relative to the mounting base (20) through the transmission mechanism; The transmission mechanism includes a first rotating part (31), a second rotating part (41) and a connecting part; the first rotating part (31) rotates coaxially with one end of the driving part (30); the second rotating part (41) is rotatably connected to the mounting base (20) and cooperates with the first rotating part (31), and the first rotating part (31) drives the second rotating part (41) to rotate; one end of the connecting part is fixedly connected to the second rotating part (41) and the other end is rotatably connected to the second side cylinder (12) to push the second side cylinder (12) to rotate relative to the mounting base (20); when the first side cylinder (11) and the second side cylinder (12) approach each other, the protective cylinder device is in a closed state; when the first side cylinder (11) and the second side cylinder (12) move away from each other, the protective cylinder device is in an open state.

2. The casing device according to claim 1, characterized in that, The connecting part includes: a rocker (42) and a connecting rod (43), one end of the rocker (42) is rotatably connected to one end of the connecting rod (43), the other end of the rocker (42) is fixedly connected to the second rotating part (41), and the other end of the connecting rod (43) is rotatably connected to the second side cylinder (12).

3. The casing device according to claim 2, characterized in that, Both the first side cylinder (11) and the second side cylinder (12) have a closed position where they approach each other and an open position where they move away from each other. While the driving part (30) drives the first side cylinder (11) to switch between the closed position and the open position, it drives the second side cylinder (12) to switch between the closed position and the open position through the transmission mechanism. When both the first side cylinder (11) and the second side cylinder (12) are in the closed position, the rocker (42) and the connecting rod (43) are arranged at an angle; when both the first side cylinder (11) and the second side cylinder (12) are in the open position, the rocker (42) and the connecting rod (43) are located on the same straight line to lock the second side cylinder (12).

4. The casing device according to claim 2, wherein, The first rotating part (31) is a first gear, the second rotating part (41) is a second gear, and the first gear meshes with the second gear so that the rotation direction of the second gear is opposite to that of the first gear.

5. The casing device according to claim 4, wherein, When the casing device switches from the closed state to the open state, the angle through which the driving part (30) rotates is a first angle, and the angle through which the rocker (42) rotates is a second angle; the ratio of the number of teeth of the first gear to the number of teeth of the second gear is equal to the ratio of the second angle to the first angle.

6. The casing device according to claim 2, characterized in that, The first side cylinder (11) and the second side cylinder (12) are symmetrically arranged with respect to the symmetry line (50). When the casing device is in the closed state, the rocker (42) is parallel to the driving part (30) and is arranged at an angle with respect to the symmetry line (50); when the casing device switches from the closed state to the open state, the angle through which the rocker (42) rotates is three times the angle through which the driving part (30) rotates.

7. The casing device according to claim 1, characterized in that, One end of the driving part (30) is configured as a mounting shaft, the mounting shaft is rotatably connected to the mounting seat (20), the first rotating part (31) is fixedly sleeved on the mounting shaft, and the mounting shaft drives the first rotating part (31) to rotate relative to the mounting seat (20).

8. The casing device according to any one of claims 1 to 6, characterized in that, The driving part (30) is a telescopic cylinder, the telescopic movement of the telescopic cylinder drives the first side cylinder (11) to rotate relative to the mounting seat (20). When the telescopic cylinder extends, the first side cylinder (11) and the second side cylinder (12) move away from each other; when the telescopic cylinder contracts, the first side cylinder (11) and the second side cylinder (12) move closer to each other.

9. An engineering machinery, characterized in that, Comprising: The casing device according to any one of claims 1-8.

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