Locking device of centrifugal machine and centrifugal machine

Abstract

The utility model relates to the technical field of centrifugal machines, in particular to a locking device of a centrifugal machine and the centrifugal machine, and aims to solve the problems that an existing centrifugal machine and a locking device of the centrifugal machine are complex in structure and large in size, and consequently reliability is poor and opening and closing are difficult. In order to achieve the purpose, the locking device comprises a lock shell fixed on the barrel body, a locking cavity is formed in the lock shell, and a lock hole communicated with the locking cavity is formed in the top of the lock shell; the lock pin is fixed to the bottom of the cover body and can penetrate through the lock hole to enter the locking cavity, and a locking opening is formed in the lock pin; the lock handle is movably connected in the locking cavity, a lock hook is arranged at the top of the lock handle and can penetrate into the locking opening to lock the lock pin, and a transmission hole is formed in the bottom of the lock handle; the transmission turntable is mounted in the transmission hole, is in rotating fit with the transmission hole and is eccentrically and rotationally connected with the lock shell; and the limiting unit can limit the lock handle, so that the lock handle swings under the driving of the transmission turntable, and the lock handle can reach a door opening standby position, a locking position and an unlocking position.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifuges, and specifically provides a locking device for a centrifuge and a centrifuge. Background Art

[0002] Centrifuge is a machine that uses centrifugal force to accelerate the separation of different materials that need to be separated. It is widely used in chemical, petroleum, food, pharmaceutical, mineral processing, coal, water treatment and shipping sectors. Centrifuges require high sealing performance to ensure the stability and efficiency of the centrifuge during operation, and to safely handle various media while reducing the risk of leakage. Therefore, the design and maintenance of sealing performance are crucial to the reliable operation of the centrifuge.

[0003] However, in order to ensure the sealing and safety during operation, the existing centrifuge and its locking device have a complex structure and a large size, resulting in poor reliability and difficulty in opening and closing.

[0004] Therefore, this field needs a new technical solution to solve the above problems. Utility Model Content

[0005] The utility model aims to solve the above technical problem, that is, to solve the problem that the existing centrifuge and its locking device have complex structure and bulky size, resulting in poor reliability and difficulty in opening and closing.

[0006] In a first aspect, the utility model provides a locking device for a centrifuge, the centrifuge comprising a barrel and a cover, the cover being movably covered on the barrel, the locking device comprising: a lock shell, the lock shell being fixed on the barrel, the interior of the lock shell forming a locking cavity, the top of the lock shell being provided with a lock hole connecting the locking cavity with an external space; a lock pin, the lock pin being fixed to the bottom of the cover and being able to pass through the lock hole into the locking cavity, and the lock pin being provided with a locking opening; a lock handle, the lock handle being movably connected in the locking cavity, the lock A lock hook is provided on the top of the lock handle, and the lock hook can be inserted into the locking port to lock the lock pin, and a transmission hole is provided at the bottom of the lock handle; a transmission turntable, which is installed in the transmission hole and rotatably cooperates with the transmission hole, and the transmission turntable is eccentrically rotationally connected to the lock shell and can drive the lock handle to perform rotational reciprocating motion; a limiting unit, which can limit the movement of the lock handle so that the lock handle swings under the drive of the transmission turntable, and then the lock handle can reach the door opening standby position, the locking position and the unlocking position.

[0007] In the preferred technical solution of the above-mentioned locking device, the locking device also includes a driving assembly, the driving assembly is fixed on the lock housing, and the output shaft of the driving assembly is eccentrically connected to the transmission turntable, and can drive the transmission turntable to rotate eccentrically relative to the lock housing.

[0008] In the preferred technical solution of the above-mentioned locking device, the driving assembly includes a driving motor and a reducer, the reducer is fixed on the lock housing, the output shaft of the driving motor is fixedly connected to the input shaft of the reducer, and the output shaft of the reducer is eccentrically connected to the transmission turntable.

[0009] In the preferred technical solution of the above-mentioned locking device, the locking device also includes a trigger turntable and a first switch, a second switch, a third switch and a fourth switch electrically connected to the drive assembly, the trigger turntable is eccentrically connected to the output shaft of the drive assembly, the first switch is arranged below the lock hook and can be triggered by the lock pin, the second switch and the fourth switch are relatively arranged on both sides of the lock handle, the third switch is arranged below the lock handle, and a trigger part is arranged on the trigger turntable at a position away from the axis center, and the trigger part can sequentially trigger the second switch, the third switch and the fourth switch during clockwise rotation.

[0010] In a preferred technical solution of the above locking device, the first switch, the second switch, the third switch and the fourth switch are all configured as micro switches, and the triggering portion is configured as a protruding structure.

[0011] In the preferred technical solution of the above-mentioned locking device, the limiting unit includes a limiting protrusion arranged on the lock handle, a first limiting pin arranged on the lock housing, and a reset torsion spring connecting the lock handle and the lock housing, and the limiting protrusion cooperates with the first limiting pin to drive the lock handle to swing in a direction away from the lock pin, and the reset torsion spring can drive the lock handle to swing in the direction of the lock pin.

[0012] In the preferred technical scheme of the above-mentioned locking device, the locking device also includes a rotating arm and a tension spring, the lock handle is provided with a second limit pin, the rotating arm is pivotally connected to the lock shell, the first end of the rotating arm is elastically connected to the lock shell through the tension spring, and when the lock handle is in the locking position, the second limit pin abuts against the second end of the rotating arm to prevent the lock hook from disengaging from the locking mouth; and / or the lock shell is also provided with a limit hole, the second limit pin is located in the limit hole and can move along the inner edge of the limit hole to limit the lock handle.

[0013] In a preferred technical solution of the above locking device, the locking device also includes a pull rope, a first end of which is fixedly connected to the locking hook, and a second end of which passes under the first end of the rotating arm and extends to the outside of the lock housing.

[0014] In a preferred technical solution of the above locking device, a stop plate is further provided on the lock handle, and the stop plate is spaced below the lock hook to prevent the lock pin from moving downward and impacting the first switch.

[0015] In a second aspect, the proposal provides a centrifuge, comprising the locking device described above.

[0016] Under the condition of adopting the above technical scheme, the utility model provides a locking device of a centrifuge, the centrifuge comprises a barrel body and a cover body, the cover body can be movably covered on the barrel body, and the locking device of the utility model comprises: a lock shell, the lock shell is fixed on the barrel body, a locking cavity is formed inside the lock shell, and a lock hole connecting the locking cavity and the external space is arranged on the top of the lock shell; a lock pin, the lock pin is fixed on the bottom of the cover body, can pass through the lock hole to enter the locking cavity, and a locking port is arranged on the lock pin; a lock handle, the lock handle is movably connected in the locking cavity, a lock hook is arranged on the top of the lock handle, the lock hook can penetrate the locking port to lock the lock pin, and a transmission hole is arranged on the bottom of the lock handle; a transmission turntable, the transmission turntable is installed in the transmission hole and rotates with the transmission hole, the transmission turntable is eccentrically rotationally connected with the lock shell, and can drive the lock handle to rotate and reciprocate; a limiting unit, the limiting unit can limit the movement of the lock handle, so that the lock handle swings under the drive of the transmission turntable, and then the lock handle can reach the door opening standby position, the locking position and the unlocking position. Through such an arrangement, on the one hand, after the lock hook and the lock pin are locked with each other, the lock handle can be driven to move downward by the eccentric rotation of the transmission turntable, so that the lock handle moves from the door opening standby position to the locking position, and then the lock pin and the cover body are pulled downward by the lock hook, thereby improving the sealing between the cover body and the barrel body; on the other hand, when unlocking is required, the lock handle can be swung horizontally by the eccentric rotation of the transmission turntable, so that the lock handle moves from the locking position to the unlocking position, and then the locking mouth is separated from the lock hook, thereby achieving the purpose of unlocking; the above arrangement not only improves the locking strength and sealing between the cover body and the barrel body, but also simplifies the structure of the locking device, improves the reliability and stability of the locking structure, and makes the locking and unlocking as well as the opening and closing of the cover body easier and more convenient.

[0017] Furthermore, the locking device of the utility model also includes a driving assembly, which is fixed on the lock housing, and the output shaft of the driving assembly is eccentrically connected to the transmission turntable, which can drive the transmission turntable to rotate eccentrically relative to the lock housing. Through such a setting, manual unlocking is replaced, making the user's locking and unlocking process easier and more labor-saving, and the locking force is stronger.

[0018] Furthermore, the drive assembly of the utility model includes a drive motor and a reducer, the reducer is fixed on the lock housing, the output shaft of the drive motor is fixedly connected to the input shaft of the reducer, and the output shaft of the reducer is eccentrically connected to the transmission turntable. Through such an arrangement, the power output by the drive motor can be decelerated and torqued by the reducer, thereby increasing the torque acting on the transmission turntable, so that the lock pin and the cover body can be easily tightened downward.

[0019] Furthermore, the locking device of the utility model also includes a triggering turntable and a first switch, a second switch, a third switch and a fourth switch electrically connected to the driving assembly, the triggering turntable is eccentrically connected to the output shaft of the driving assembly, the first switch is arranged below the lock hook and can be triggered by the lock pin, the second switch and the fourth switch are relatively arranged on both sides of the lock handle, the third switch is arranged below the lock handle, and a triggering part is arranged on the triggering turntable away from the axis, and the triggering part can sequentially trigger the second switch, the third switch and the fourth switch during the clockwise rotation process. Through such a setting, on the one hand, the position of the lock pin and the locking state of the lock pin and the lock hole can be detected by the triggering of the lock pin on the first switch, and then the start and stop of the driving motor can be controlled by the first switch; on the other hand, the start and stop of the driving motor can be controlled by the triggering of the second switch, the third switch and the fourth switch by the triggering turntable, so that the lock handle can accurately reach different workstations.

[0020] Furthermore, the first switch, the second switch, the third switch and the fourth switch of the utility model are all configured as micro switches, and the trigger part is configured as a protruding structure. Through such a configuration, the trigger device has a simple structure and low cost, and the trigger signal is more accurate and reliable, which facilitates the precise control of the drive motor, thereby improving the accuracy of the lock hook running between various workstations.

[0021] Furthermore, the limiting unit of the utility model includes a limiting protrusion arranged on the lock handle, a first limiting pin arranged on the lock shell, and a reset torsion spring connecting the lock handle and the lock shell. The limiting protrusion cooperates with the first limiting pin to drive the lock handle to swing in a direction away from the lock pin, and the reset torsion spring can drive the lock handle to swing in the direction of the lock pin. Through such a setting, the limiting protrusion cooperates with the first limiting pin to push the lock hook out of the locking port during the upward movement of the lock handle to complete the unlocking; the reset torsion spring can apply a restoring force to the lock handle in the direction of the lock pin when the lock handle is not subjected to external force, so that the lock handle can be reset in time after the limiting protrusion is separated from the first limiting pin.

[0022] Furthermore, the locking device of the utility model further comprises a rotating arm and a tension spring, a second limiting pin is provided on the lock handle, the rotating arm is pivotally connected to the lock housing, the first end of the rotating arm is elastically connected to the lock housing through the tension spring, and when the lock handle is in the locking position, the second limiting pin abuts against the second end of the rotating arm to prevent the lock hook from escaping from the locking opening; and / or the lock housing further comprises a limiting hole, the second limiting pin is located in the limiting hole and can move along the inner edge of the limiting hole to limit the lock handle. Through such a setting, the horizontal movement of the lock hook can be limited, the lock hook is locked in the locking opening, and the lock hook is prevented from escaping from the locking opening, thereby improving the stability and safety of the locking state; the limiting hole can limit the movement range of the lock handle so that it can just move between several workstations.

[0023] Furthermore, the locking device of the utility model also includes a pull rope, the first end of which is fixedly connected to the lock hook, and the second end of which is passed around the bottom of the first end of the rotating arm and extends to the outside of the lock shell. Through such an arrangement, a manual unlocking solution is provided, that is, the first end of the rotating arm is pulled upward by the pull rope to make the second end of the rotating arm rotate downward and release the abutment with the second limit pin, so that the lock hook can be pulled out of the lock hole at the same time to complete the unlocking, avoiding the centrifuge being unable to unlock after an accidental power failure; the tension spring can automatically reset the rotating arm after the tension disappears.

[0024] Furthermore, the lock handle of the utility model is also provided with a stop plate, which is arranged at intervals below the lock hook and can prevent the lock pin from moving downward and impacting the first switch. Through such an arrangement, the downward movement of the lock pin can be limited to prevent the lock pin from pressing the first switch to the limit position, which has a protective effect on the first switch and prolongs its service life.

[0025] In addition, the centrifuge further provided by the utility model on the basis of the above locking device has the technical effect possessed by the above locking device due to the adoption of the above locking device. Compared with the centrifuge before the improvement, the structure of the centrifuge of the utility model is simpler and more compact, and the automation of locking and unlocking as well as the pull-down locking of the cover body are realized, so that the locking and opening and closing of the cover body are more stable and convenient, and the sealing and safety of the centrifuge are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0027] Figure 1 This is a schematic diagram of the structure of the locking device of the centrifuge of the utility model Figure 1 ;

[0028] Figure 2 This is a schematic diagram of the structure of the locking device of the centrifuge of the utility model Figure 2 ;

[0029] Figure 3 yes Figure 2 A partial enlarged view of the

[0030] Figure 4 This is a schematic diagram of the structure of the locking device of the centrifuge of the utility model Figure 3 ;

[0031] Figure 5 This is a schematic diagram of the structure of the locking device of the centrifuge of the utility model Figure 4 ;

[0032] Figure 6 It is a schematic diagram of the assembly of the lock pin, lock handle and transmission turntable of the utility model;

[0033] Figure 7 It is a schematic diagram of the assembly of the lock pin and the lock handle of the utility model;

[0034] Figure 8 It is a structural schematic diagram of the locking device of the utility model when the door is opened and the standby position;

[0035] Fig. 9 It is a schematic diagram of the structure of the locking device of the utility model in which the lock hook and the locking opening are locked with each other;

[0036] Fig.10 It is a structural schematic diagram of the locking device of the utility model when it is in the unlocking position;

[0037] Fig.11 It is a schematic diagram of the structure of the utility model after the lock pin and the lock handle are separated;

[0038] Fig.12 It is a schematic structural diagram of the locking device of the utility model when it is manually unlocked.

[0039] List of reference numerals:

[0040] 1. Lock pin; 11. Locking mouth; 2. Lock handle; 21. Lock hook; 22. Transmission hole; 23. Limiting protrusion; 24. Second limiting pin; 25. Stop plate; 3. Transmission turntable; 41. Drive motor; 42. Reducer; 5. Trigger turntable; 51. Trigger part; 61. First switch; 62. Second switch; 63. Third switch; 64. Fourth switch; 7. Reset torsion spring; 81. Rotating arm; 82. Tension spring; 83. Pull rope; 9. Lock housing; 91. First limiting pin; 92. Limiting hole. DETAILED DESCRIPTION

[0041] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0042] It should be noted that in the description of the present invention, the terms "inside", "outside", "upper", "lower", "top", "bottom" and other terms indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0043] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "connect", and "install" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Based on the problems pointed out in the background technology that the existing centrifuge and its locking device are complex in structure and bulky in size, resulting in poor reliability and difficulty in opening and closing. The utility model provides a locking device for a centrifuge and a centrifuge, by providing a lock handle and a lock hook that lock with a lock pin, and providing a transmission turntable, a trigger turntable and a plurality of switches, and driving the transmission turntable and the trigger turntable to rotate eccentrically by a driving motor, so that the lock handle and the lock hook reach different workstations, and respectively trigger the corresponding switches to realize automatic padlocking, locking and unlocking of the locking device, thereby improving the sealing and locking strength of the locking device, and making locking and unlocking easier and more convenient.

[0045] Specifically, if Figures 1 to 12 As shown, the centrifuge of the utility model includes a barrel body and a cover body, the cover body can be movably covered on the barrel body, and the locking device of the utility model includes: a lock shell 9, the lock shell 9 is fixed on the barrel body, the interior of the lock shell 9 forms a locking cavity, and the top of the lock shell 9 is provided with a lock hole connecting the locking cavity and the external space; a lock pin 1, the lock pin 1 is fixed to the bottom of the cover body, can pass through the lock hole into the locking cavity, and the lock pin 1 is provided with a locking port 11; a lock handle 2, the lock handle 2 is movably connected in the locking cavity, and the top of the lock handle 2 is provided with a lock hook 21 The lock hook 21 can be inserted into the locking opening 11 to lock the lock pin 1, and a transmission hole 22 is provided at the bottom of the lock handle 2; a transmission turntable 3, the transmission turntable 3 is installed in the transmission hole 22 and rotates with the transmission hole 22, the transmission turntable 3 is eccentrically connected to the lock shell 9, and can drive the lock handle 2 to rotate and reciprocate; a limiting unit, the limiting unit can limit the movement of the lock handle 2, so that the lock handle 2 swings under the drive of the transmission turntable 3, and then the lock handle 2 can reach the door opening standby position, the locking position and the unlocking position.

[0046] Exemplarily, the top of the barrel body has an access opening, and the cover body is pivotally connected to the top of the barrel body to open and close the access opening. The locking device is installed at the junction of the cover body and the barrel body, and its number can be flexibly set to one or more. The locking pin 1 is set at the edge of the cover body and extends downward. The locking pin 1 can pass through the locking hole into the locking cavity and be locked with the lock hook 21 through the locking mouth 11. The locking handle 2, the transmission turntable 3, etc. are all installed in the locking cavity.

[0047] The transmission turntable 3 can be manually driven from the outside through a rocker or a turntable, or can be electrically driven by installing a drive motor 41 or other drive components. In this case, the electric drive method is preferably used.

[0048] Specifically, the drive assembly is installed on the outside of the lock shell 9, and is preferably set to a combination of a drive motor 41 and a reducer 42. The output shaft of the reducer 42 passes through the lock shell 9 and is eccentrically connected to the transmission turntable 3 and the trigger turntable 5 on the inside of the lock shell 9, wherein the transmission turntable 3 and the trigger turntable 5 are also plugged and fixed by means of a limit hole 92 and a limit pin, so that the drive assembly can drive the transmission turntable 3 and the trigger turntable 5 to rotate eccentrically synchronously, and the transmission hole 22 on the lock handle 2 is adapted to the transmission turntable 3, so that the transmission turntable 3 can rotate and slide in the transmission hole 22, similar to the engine's crankshaft driving the cylinder connecting rod to perform rotational reciprocating motion, and the transmission turntable 3 can drive the lock handle 2 to perform rotational reciprocating motion through eccentric rotation.

[0049] The limiting unit can limit the movement trajectory of the lock handle 2, and can increase the horizontal swing amplitude of the lock handle 2 during the rotational reciprocating motion of the lock handle 2, so that the lock handle 2 can reach the door opening standby position, the locking position and the unlocking position, ensuring that the lock hook 21 can enter the locking mouth 11 to complete the locking when the lock handle 2 is in the door opening standby position and the locking position, and can completely withdraw from the locking mouth 11 to complete the unlocking when the lock handle 2 is in the unlocking position.

[0050] Preferably, the limiting unit includes a limiting protrusion 23 arranged on the lock handle 2, a first limiting pin 91 arranged on the lock housing 9, and a reset torsion spring 7 connecting the lock handle 2 and the lock housing 9. The limiting protrusion 23 cooperates with the first limiting pin 91 to drive the lock handle 2 to swing in the direction away from the lock pin 1, and the reset torsion spring 7 can drive the lock handle 2 to swing in the direction of the lock pin 1.

[0051] The limiting protrusion 23 is arranged on the edge of the middle part of the lock handle 2 close to the lock pin 1, and the first limiting pin 91 is arranged between the lock handle 2 and the lock pin 1. When the limiting protrusion 23 moves with the lock handle 2 to touch the first limiting pin 91, the interaction between the two will drive the upper part of the lock handle 2 to swing away from the lock pin 1, thereby separating the lock hook 21 from the locking mouth 11. When the limiting protrusion 23 moves to one side of the first limiting pin 91, the lock handle 2 will complete the reset under the action of the reset torsion spring 7.

[0052] Specifically, if Figures 8 to 11 As shown, when the distal point of the transmission turntable 3 rotates to the upper part, the lock handle 2 will be lifted by the transmission turntable 3, so that the lock handle 2 and the lock hook 21 reach the door opening standby position (such as Figure 8 As shown), in the door open standby position, the lock pin 1 can enter the locking opening 11 to complete the locking as the cover body closes downward (as shown in FIG. Fig. 9 When the distal point of the transmission turntable 3 rotates to the lower half of the transmission turntable 3, the lock handle 2 moves downward along with the distal point, so that the lock handle 2 and the lock hook 21 reach the locking position to pull the lock pin 1 and the cover body downward together; in addition, the first limit pin 91 is located on the left side of the middle of the lock handle 2, as shown in FIG. Fig.10 As shown, when the distal point rotates from the bottom to the left side (that is, when the lock handle 2 moves from the locked position to the unlocked position), the lower end of the lock handle 2 will swing leftward to the lower left of the first limit pin 91. At this time, the limit protrusion 23 will move to touch the first limit pin 91. Under the action of the first limit pin 91, the limit protrusion 23 makes the upper end of the lock handle 2 swing rightward to the upper right of the first limit pin 91, thereby making the lock hook 21 move rightward and disengage from the locking mouth 11, so as to achieve the unlocking of the two. After unlocking, the lock pin 1 and the cover body can be opened freely upward (as shown in FIG. Fig.11 shown).

[0053] At the same time, a first switch 61 fixed on the lock handle 2 is provided below the lock hook 21, and a second switch 62 and a fourth switch 64 fixedly connected to the lock shell 9 are relatively provided at the upper positions on both sides of the trigger turntable 5, and a third switch 63 fixedly connected to the lock shell 9 is provided below the trigger turntable 5. The first switch 61, the second switch 62, the third switch 63 and the fourth switch 64 can all control the start and stop of the drive motor 41.

[0054] Specifically, if Figures 8 to 11 As shown, when the cover is closed and the lock hook 21 enters the locking opening 11, the bottom of the lock pin 1 will trigger the first switch 61, and a trigger portion 51 is provided at the distal end of the trigger turntable 5. The trigger portion 51 can sequentially trigger the second switch 62, the third switch 63 and the fourth switch 64 as the trigger turntable 5 rotates, and when the lock handle 2 reaches the door opening standby position, the trigger portion 51 just turns to the position of triggering the second switch 62, when the lock handle 2 reaches the locking position, the trigger portion 51 just turns to the position of triggering the third switch 63, and when the lock handle 2 turns to the unlocking position, the trigger portion 51 just turns to the position of triggering the fourth switch 64.

[0055] The specific operation process is: when the cover body is opened, the lock handle 2 remains in the door opening standby position. When the cover body is closed downward, the lock pin 1 passes through the lock hole into the locking cavity and locks with the lock hook 21. It should be noted here that the top of the lock hook 21 is set as an inclined structure. When the lock handle 2 is in the door opening standby position, the reset torsion spring 7 is not subject to external force. Therefore, in the process of the lock hook 21 downwardly engaging with the lock hole, the inclined surface will be squeezed to push the lock hook 21 to one side, and the reset torsion spring 7 will be subjected to torsion force to accumulate elastic potential energy. When the locking mouth 11 drops to the same height as the lock hook 21, the restoring force generated by the reset torsion spring 7 will press the lock hook 21 into the locking mouth 11 to complete the locking of the two.

[0056] When the lock hook 21 enters the locking opening 11, the bottom end of the lock pin 1 will trigger the first switch 61, so that the drive motor 41 is powered on and drives the lock handle 2 to move to the locking position through the transmission turntable 3. During this process, the trigger part 51 on the trigger turntable 5 will disconnect the second switch 62 and rotate in the direction of the third switch 63. When the trigger part 51 triggers the third switch 63, the third switch 63 will control the drive motor 41 to stop, so that the lock handle 2 and the lock hook 21 stop in the locking position, thereby locking the cover body.

[0057] When unlocking is required, the user only needs to operate the unlocking button to make the drive motor 41 continue to start and drive the lock handle 2 to move to the unlocking position, and drive the trigger part 51 to rotate toward the fourth switch 64 synchronously. When the trigger part 51 triggers the fourth switch 64, the fourth switch 64 will control the drive motor 41 to stop, so that the lock handle 2 remains in the unlocking position, so that the lock pin 1 can be separated from the lock hook 21.

[0058] When the cover is opened, the lock pin 1 moves upward and separates from the lock hook 21, and the first switch 61 is disconnected at the same time. The disconnection of the first switch 61 will energize the drive motor 41 again, causing the lock handle 2 to move to the door opening standby position until the trigger part 51 triggers the second switch 62 again to cut off the power to the drive motor 41, thereby stopping the lock handle 2 in the door opening standby position, waiting for the next closing of the cover.

[0059] Through such arrangement, on the one hand, after the lock hook 21 and the lock pin 1 are locked with each other, the lock handle 2 can be driven to move downward by the eccentric rotation of the transmission turntable 3, so that the lock handle 2 moves from the door opening standby position to the locking position, and then the lock pin 1 and the cover body are pulled downward by the lock hook 21, thereby improving the sealing between the cover body and the barrel body; on the other hand, when unlocking is required, the lock handle 2 can be swung horizontally by the eccentric rotation of the transmission turntable 3, so that the lock handle 2 moves from the locking position to the unlocking position, and then the locking mouth 11 is separated from the lock hook 21, thereby achieving the purpose of unlocking; the above arrangement not only improves the locking strength and sealing between the cover body and the barrel body, but also simplifies the structure of the locking device, improves the reliability and stability of the locking structure, and makes the locking, unlocking and opening and closing of the cover body easier and more convenient.

[0060] Preferably, if Figure 1 , Figure 2 and Figure 5 As shown, the locking device of the utility model further includes a driving assembly, which is fixed on the lock housing 9, and the output shaft of the driving assembly is eccentrically connected to the transmission turntable 3, and can drive the transmission turntable 3 to rotate eccentrically relative to the lock housing 9. The driving device is electrically driven, replacing manual drive to lock and unlock, making the locking and unlocking process easier and more labor-saving, and increasing the locking force.

[0061] Preferably, if Figure 1 , Figure 2 and Figure 5 As shown, the drive assembly of the utility model includes a drive motor 41 and a reducer 42, the reducer 42 is fixed on the lock housing 9, the output shaft of the drive motor 41 is fixedly connected to the input shaft of the reducer 42, and the output shaft of the reducer 42 is eccentrically connected to the transmission turntable 3. The combination of the drive motor 41 and the reducer 42 can reduce the speed and increase the torque output by the drive motor 41 through the reducer 42, thereby increasing the torque acting on the transmission turntable 3, so that the lock pin 1 and the cover body can be pulled downward more easily.

[0062] Preferably, if Figures 2 to 6 As shown, the locking device of the utility model further includes a triggering turntable 5 and a first switch 61, a second switch 62, a third switch 63 and a fourth switch 64 electrically connected to the driving assembly. The triggering turntable 5 is eccentrically connected to the output shaft of the driving assembly. The first switch 61 is arranged below the lock hook 21 and can be triggered by the lock pin 1. The second switch 62 and the fourth switch 64 are relatively arranged on both sides of the lock handle 2. The third switch 63 is arranged below the lock handle 2. A triggering portion 51 is arranged at a position away from the axis on the triggering turntable 5. The triggering portion 51 can sequentially trigger the second switch 62, the third switch 63 and the fourth switch 64 during the clockwise rotation process. On the one hand, the position of the lock pin 1 and the locking state of the lock pin 1 and the lock hole can be detected by the triggering of the lock pin 1 on the first switch 61, and then the start and stop of the driving motor 41 can be controlled by the first switch 61; on the other hand, the start and stop of the driving motor 41 can be controlled by the triggering of the second switch 62, the third switch 63 and the fourth switch 64 by the triggering turntable 5, so that the lock handle 2 can accurately reach different positions.

[0063] It should be noted that, in actual applications, those skilled in the art can flexibly set the first switch 61, the second switch 62, the third switch 63 and the fourth switch 64 as micro switches or electromagnetic induction switches, etc., as long as they can be triggered in conjunction with the trigger part 51. Such flexible adjustment and change does not deviate from the principle and scope of the present utility model and should be limited within the protection scope of the present utility model.

[0064] Preferably, if Figures 2 to 6 As shown, the first switch 61, the second switch 62, the third switch 63 and the fourth switch 64 of the utility model are all configured as micro switches, and the trigger portion 51 is configured as a protruding structure. The cooperation between the micro switch and the protruding structure makes the trigger device simple in structure and low in cost, and the trigger signal is more accurate and reliable, which facilitates the precise control of the drive motor 41, thereby improving the accuracy of the operation of the lock hook 21 between various stations.

[0065] Preferably, if Figure 4 and Figure 6 As shown, the locking device of the present invention also includes a rotating arm 81 and a tension spring 82, a second limit pin 24 is provided on the lock hook 21, the rotating arm 81 is pivotally connected to the lock shell 9, the first end of the rotating arm 81 is elastically connected to the lock shell 9 through the tension spring 82, when the lock handle 2 is in the locking position, the second limit pin 24 abuts against the second end of the rotating arm 81 to prevent the lock hook 21 from disengaging from the locking mouth 11; and / or the lock shell 9 also has a limit hole 92, the second limit pin 24 is located in the limit hole 92 and can move along the inner edge of the limit hole 92 to limit the lock handle 2.

[0066] like Figure 4 As shown, the rotating arm 81 is arranged on the right side of the locking handle 2, and the tension spring 82 keeps the rotating arm 81 in a nearly horizontal state. When the locking handle 2 is in the locked position, the second limiting pin 24 is exactly at the same height as the second end of the rotating arm 81 and the two are abutted in the horizontal direction, so that the lock hook 21 can be locked in the locked position to prevent the lock hook 21 from escaping from the locking hole 11, thereby improving the stability and safety of the locking. The second end of the rotating arm 81 is arranged as an inclined surface slightly inclined to the right. When unlocking is required, that is, during the movement of the locking handle 2 from the locked position to the unlocked position, the second limiting pin 24 will go around the upper part of the rotating arm 81 along the inclined surface of the second end of the rotating arm 81 to release the horizontal limitation of the locking handle 2 by the rotating arm 81, so that the lock hook 21 can move to the right to exit from the locking hole 11.

[0067] The limiting hole 92 is preferably arranged in a fan shape, which can limit the movement range of the lock handle 2 so that it can move between several working positions.

[0068] Preferably, if Figure 2 , Figure 3 and Fig.12 As shown, the locking device of the present invention further includes a pull rope 83 , a first end of which is fixedly connected to the lock hook 21 , and a second end of the pull rope 83 passes under the first end of the rotating arm 81 and extends to the outside of the lock housing 9 .

[0069] For example, Fig.12As shown, the first end of the pull rope 81 is inserted into the through hole on the lock hook 21 and bound, and the second end of the pull rope 81 is passed under the first end of the rotating arm 81 and extends to the outside of the centrifuge. When the centrifuge is accidentally powered off and the drive motor 41 cannot be started, the user can pull the first end of the pull rope 81 to rotate the rotating arm 81 counterclockwise, and then the second end of the rotating arm 81 moves downward and contacts and locks with the second limit pin 24, so that the lock hook 21 can be pulled out of the lock hole to complete the unlocking. A manual unlocking solution is provided to avoid the centrifuge being unable to be unlocked after an accidental power outage, thereby improving the safety and flexibility of unlocking. The tension spring 82 can automatically reset the rotating arm 81 after the tension disappears.

[0070] Preferably, if Figures 2 to 5 As shown, a stop plate 25 is also provided on the lock handle 2 of the present invention. The stop plate 25 is spaced below the lock hook 21 and can prevent the lock pin 1 from moving downward and impacting the first switch 61 .

[0071] Through such a configuration, the downward movement of the lock pin 1 can be limited to prevent the lock pin 1 from pressing the first switch 61 to the limit position, thereby protecting the first switch 61 and extending its service life.

[0072] In addition, the centrifuge further provided by the utility model on the basis of the above locking device has the technical effect possessed by the above locking device due to the adoption of the above locking device. Compared with the centrifuge before the improvement, the structure of the centrifuge of the utility model is simpler and more compact, and the automation of locking and unlocking is realized, so that the locking and opening and closing of the cover body are more stable and convenient, and the sealing and safety of the centrifuge are improved.

[0073] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A locking device for a centrifuge, the centrifuge comprising a barrel and a cover, the cover movably covering the barrel, characterized in that: The locking device comprises: A lock shell, wherein the lock shell is fixed to the barrel body, a locking cavity is formed inside the lock shell, and a lock hole is provided on the top of the lock shell to connect the locking cavity with the external space; A lock pin, which is fixed to the bottom of the cover body and can pass through the lock hole into the locking cavity, and a locking opening is provided on the lock pin; A lock handle, the lock handle is movably connected in the locking cavity, a lock hook is arranged on the top of the lock handle, the lock hook can be inserted into the locking opening to lock the lock pin, and a transmission hole is arranged on the bottom of the lock handle; A transmission turntable, the transmission turntable is installed in the transmission hole and rotatably cooperates with the transmission hole, the transmission turntable is eccentrically rotatably connected to the lock housing, and can drive the lock handle to perform rotational reciprocating motion; A limiting unit, wherein the limiting unit can limit the movement of the lock handle, so that the lock handle can swing under the drive of the transmission turntable, and then the lock handle can reach the door opening standby position, the locking position and the unlocking position.

2. The locking device according to claim 1, characterized in that: The locking device further comprises a driving assembly, wherein the driving assembly is fixed on the lock housing, and an output shaft of the driving assembly is eccentrically connected to the transmission turntable, and can drive the transmission turntable to rotate eccentrically relative to the lock housing.

3. The locking device according to claim 2, characterized in that: The driving assembly includes a driving motor and a reducer, wherein the reducer is fixed on the lock housing, the output shaft of the driving motor is fixedly connected to the input shaft of the reducer, and the output shaft of the reducer is eccentrically connected to the transmission turntable.

4. The locking device according to claim 2, characterized in that: The locking device also includes a trigger turntable and a first switch, a second switch, a third switch and a fourth switch electrically connected to the drive assembly, the trigger turntable is eccentrically connected to the output shaft of the drive assembly, the first switch is arranged below the lock hook and can be triggered by the lock pin, the second switch and the fourth switch are relatively arranged on both sides of the lock handle, the third switch is arranged below the lock handle, and a trigger part is arranged on the trigger turntable at a position away from the axis, and the trigger part can sequentially trigger the second switch, the third switch and the fourth switch during clockwise rotation.

5. The locking device according to claim 4, characterized in that: The first switch, the second switch, the third switch and the fourth switch are all configured as micro switches, and the triggering portion is configured as a protruding structure.

6. The locking device according to claim 1, characterized in that: The limiting unit includes a limiting protrusion arranged on the lock handle, a first limiting pin arranged on the lock housing, and a reset torsion spring connecting the lock handle and the lock housing. The limiting protrusion cooperates with the first limiting pin to drive the lock handle to swing in a direction away from the lock pin, and the reset torsion spring can drive the lock handle to swing in the direction of the lock pin.

7. The locking device according to claim 1, characterized in that: The locking device further comprises a rotating arm and a tension spring, the locking handle is provided with a second limiting pin, the rotating arm is pivotally connected to the lock housing, the first end of the rotating arm is elastically connected to the lock housing via the tension spring, and when the locking handle is in the locking position, the second limiting pin abuts against the second end of the rotating arm to prevent the lock hook from disengaging from the locking opening; And / or the lock housing further has a limiting hole, the second limiting pin is located in the limiting hole and can move along the inner edge of the limiting hole to limit the lock handle.

8. The locking device according to claim 7, characterized in that: The locking device also includes a pull rope, a first end of which is fixedly connected to the lock hook, and a second end of which passes under the first end of the rotating arm and extends to the outside of the lock housing.

9. The locking device according to claim 5, characterized in that: The lock handle is also provided with a stop plate, which is spaced below the lock hook and can prevent the lock pin from moving downward and impacting the first switch.

10. A centrifuge, characterized in that: The centrifuge comprises the locking device according to any one of claims 1 to 9.

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