阅读说明：本技术 一种保温舱开关盖装置 (Switch cover device of heat preservation cabin ) 是由 吴建胜 徐鹤元 谢文建 王艳 赵黎明 程斐 蒋爱民 路世奇 白学文 于 2020-07-20 设计创作，主要内容包括：本发明涉及一种保温舱开关盖装置,包括伺服电机、传动轴和两个间隔设置的电动缸,电动缸包括缸体,缸体的下端固定有下支耳,下支耳与舱体上对应设置的下支座铰接,缸体中设有丝杠和蜗杆,丝杠的下端同轴固定有与蜗杆啮合的蜗轮,丝杠上套设有与其配合的螺母,螺母与缸体之间设有沿轴向的导向机构,螺母的上侧同轴固定有活塞杆,活塞杆的上端伸出缸体并固定有上支耳,上支耳与舱盖上对应设置的上支座铰接,传动轴的两端分别通过联轴器对应与两个电动缸的蜗杆同轴连接,伺服电机固定在一电动缸相对于传动轴的另一侧,伺服电机的输出轴通过联轴器与该电动缸的蜗杆同轴连接。其具有结构简单、控制方便、同步性好、可靠性高的优点。(The invention relates to a switch cover device of a thermal insulation cabin, which comprises a servo motor, the electric cylinder comprises a transmission shaft and two electric cylinders arranged at intervals, the electric cylinder comprises a cylinder body, a lower support lug is fixed at the lower end of the cylinder body, the lower support lug is hinged to a lower support seat correspondingly arranged on a cabin body, a lead screw and a worm are arranged in the cylinder body, a worm wheel meshed with the worm is coaxially fixed at the lower end of the lead screw, a nut matched with the lead screw is sleeved on the lead screw, a guide mechanism along the axial direction is arranged between the nut and the cylinder body, a piston rod is coaxially fixed on the upper side of the nut, the upper end of the piston rod extends out of the cylinder body and is fixed with an upper support lug, the upper support lug is hinged to an upper support seat correspondingly arranged on the cabin cover, two ends of the transmission shaft are respectively and correspondingly and coaxially connected with the worms of the two electric cylinders through couplers, a servo motor is fixed on. The device has the advantages of simple structure, convenient control, good synchronism and high reliability.)

1. A switch cover device of a heat preservation cabin comprises a servo motor (1), a transmission shaft (2) and two electric cylinders (3) arranged at intervals, and is characterized in that each electric cylinder (3) comprises a cylinder body (31), a lower support lug (32) is fixed at the lower end of each cylinder body (31), each lower support lug (32) is hinged to a lower support seat (101) correspondingly arranged on a cabin body (100), a lead screw (33) and a worm (34) are arranged in each cylinder body (31), a worm wheel (331) meshed with the worm (34) is coaxially fixed at the lower end of the lead screw (33), a nut (35) matched with the lead screw (33) is sleeved on the lead screw (33), an axial guide mechanism is arranged between the nut (35) and the cylinder body (31), a piston rod (36) is coaxially fixed on the upper side of the nut (35), an upper support lug (37) extends out of each cylinder body (31) and is fixed at the upper end of each piston rod (36), and the upper support lug (37) is hinged to an upper support seat (201), the two ends of the transmission shaft (2) are respectively and correspondingly connected with the worms (34) of the two electric cylinders (3) in a coaxial mode through the couplers (4), the servo motor (1) is fixed on the other side, opposite to the transmission shaft (2), of one electric cylinder (3), and the output shaft of the servo motor (1) is connected with the worms (34) of the electric cylinders (3) in a coaxial mode through the couplers (4).

2. The switch cover device of the thermal insulation cabin according to claim 1, wherein a hand wheel (5) is arranged on the other side of the electric cylinder (3) relative to the transmission shaft (2), and the hand wheel (5) is coaxially and fixedly connected with a worm (34) of the electric cylinder (3); the hand wheel (5) and the servo motor (1) are arranged on different electric cylinders (3).

3. The switch cover device of the heat preservation cabin according to claim 2, characterized in that the cylinder body (31) comprises a base (311) and a cylinder body (312) installed on the base (311) through threads, the cylinder body (312) is provided with an extending access switch (38) and a receiving access switch (38'), and the lower support lug (32) is fixed on the bottom of the base (311) through a bolt.

4. The switch cover device of the heat preservation cabin according to claim 3, characterized in that the screw rod (33) is provided with an upper locating sleeve (332) and a lower locating sleeve (333) at the upper side and the lower side of the worm wheel (331) correspondingly, and a first bearing (334) and a second bearing (335) are clamped between the upper locating sleeve (332) and the lower locating sleeve (333) and the base (311) correspondingly; and third bearings (341) are respectively clamped between the two ends of the worm (34) and the base (311).

5. The thermal insulation cabin switch cover device as claimed in claim 4, wherein a ring platform (351) is arranged on the outer wall of the nut (35), the ring platform (351) is provided with an axial guide groove, an axial guide strip (313) is fixed on the inner wall of the cylinder body (312), and the guide strip (313) is positioned in the guide groove of the ring platform (351).

6. The thermal compartment cover and shutter device according to claim 5, wherein the lower end of the piston rod (36) is threadedly mounted on the nut (35), and the upper lug (37) is threadedly mounted on the piston rod (36); the upper ends of the screw rod (33) and the cylinder body (312) are correspondingly fixed with a first supporting sleeve (336) and a second supporting sleeve (314), and the inner wall and the outer wall of the piston rod (36) are correspondingly matched with the first supporting sleeve (336) and the second supporting sleeve (314) in a sliding mode.

7. The switch cover device of the thermal insulation cabin according to claim 5, characterized in that a swing arm (6) is arranged between the two electric cylinders (1), one end of the swing arm (6) is sleeved on the transmission shaft (2) and a deep groove ball bearing (61) is arranged between the two, and the other end of the swing arm (6) is hinged with a lower support (101) correspondingly arranged on the cabin body (100).

8. The switch cover device of the thermal insulation cabin in claim 5, characterized in that the threads of the worm (34) and the worm wheel (331) are trapezoidal threads, and the servo motor (1) is provided with a band-type brake.

9. The switch cover device of the heat-preservation cabin, according to claim 5, characterized by further comprising a controller (7), a motor driver (8), and an on-to-position approach switch (9) and an off-to-position approach switch (9 ') arranged on the cabin cover (200), wherein the controller (7) is connected with the motor driver (8) through a CAN bus, the motor driver (8) is connected with the motor (1) and the on-position approach switches (38) and the off-position approach switches (38 ') on the two electric cylinders (3) through cables, and the on-position approach switches (9) and the off-position approach switches (9 ') are connected with the controller (7); the controller (7) is connected with a cover opening button (71) and a cover closing button (72), the cover opening button (71) is used for triggering a cover opening instruction, and the cover closing button (72) is used for triggering a cover closing instruction.

10. The switch cover device of the thermal insulation cabin according to claim 9, further comprising an upper computer in communication connection with the controller (7), wherein the controller (7) is connected with a switching knob (73) for switching between a local control mode and a remote control mode.

Technical Field

The invention relates to a lifting device, in particular to a cover opening and closing device for a thermal insulation cabin.

Background

In the field of aerospace, products such as rockets and the like are generally stored and transported by using insulated cabins (boxes). The heat preservation cabin needs to be provided with a cabin cover so as to provide an avoiding space for the product to enter and exit the heat preservation cabin in an uncovering state and provide a constant temperature and humidity environment for the product in a covering state. The existing cover opening and closing mechanism of the insulation cabin usually adopts hydraulic cylinders arranged at intervals as executing components and carries out synchronous control through a hydraulic pipeline and a hydraulic valve member, and the mode has the following problems in practical application: 1) longer hydraulic pipelines need to be arranged, the system is complex and inconvenient to maintain, and the risk of pipeline leakage exists, so that the safety and the reliability are influenced; 2) the integrated design of a driving control mechanism and an actuating mechanism cannot be realized, the control difficulty is high, the synchronism is poor, and the opening and closing requirements of a large-span (more than 3 m) hatch cover cannot be met.

Disclosure of Invention

The invention aims to provide a thermal insulation cabin opening and closing cover device which has the advantages of simple structure, convenience in control, good synchronism and high reliability.

In order to solve the problems in the prior art, the invention provides a switch cover device of a thermal insulation cabin, which comprises a servo motor, a transmission shaft and two electric cylinders arranged at intervals, wherein each electric cylinder comprises a cylinder body, a lower support lug is fixed at the lower end of the cylinder body, the lower support lug is hinged with a lower support seat correspondingly arranged on a cabin body, a lead screw and a worm are arranged in the cylinder body, a worm wheel meshed with the worm is coaxially fixed at the lower end of the lead screw, a nut matched with the lead screw is sleeved on the lead screw, an axial guide mechanism is arranged between the nut and the cylinder body, a piston rod is coaxially fixed on the upper side of the nut, the upper end of the piston rod extends out of the cylinder body and is fixed with an upper support lug, the upper support lug is hinged with an upper support seat correspondingly arranged on the cabin cover, two ends of the transmission shaft are respectively and correspondingly and coaxially connected with two electric worms of the two electric, an output shaft of the servo motor is coaxially connected with a worm of the electric cylinder through a coupler.

Further, the switch cover device of the heat preservation cabin is characterized in that a hand wheel is arranged on the other side, opposite to the transmission shaft, of the electric cylinder, and the hand wheel is coaxially and fixedly connected with a worm of the electric cylinder; the hand wheel and the servo motor are arranged on different electric cylinders.

Further, the switch cover device of the heat preservation cabin comprises a cylinder body and a lower support lug, wherein the cylinder body comprises a base and a cylinder body, the cylinder body is installed on the base through threads, an extending position access switch and a receiving position access switch are arranged on the cylinder body, and the lower support lug is fixed to the bottom of the base through bolts.

Further, the switch cover device of the heat preservation cabin is characterized in that the upper side and the lower side of the worm gear of the screw rod are correspondingly provided with an upper locating sleeve and a lower locating sleeve, and a first bearing and a second bearing are correspondingly clamped between the upper locating sleeve and the base and between the lower locating sleeve and the base; and third bearings are respectively clamped between the two ends of the worm and the base.

Further, the switch cover device of the heat preservation cabin is characterized in that a ring table is arranged on the outer wall of the nut, an axial guide groove is formed in the ring table, an axial guide strip is fixed on the inner wall of the cylinder body, and the guide strip is located in the guide groove of the ring table.

Further, the invention relates to a switch cover device of a heat preservation cabin, wherein the lower end of a piston rod is arranged on a nut through threads, and an upper lug is arranged on the piston rod through threads; the upper ends of the screw rod and the cylinder body are correspondingly fixed with a first supporting sleeve and a second supporting sleeve, and the inner wall and the outer wall of the piston rod are correspondingly matched with the first supporting sleeve and the second supporting sleeve in a sliding mode.

Further, the switch cover device of the heat preservation cabin is characterized in that a swing arm is arranged between the two electric cylinders, one end of the swing arm is sleeved on the transmission shaft, a deep groove ball bearing is arranged between the two electric cylinders, and the other end of the swing arm is hinged with a lower support correspondingly arranged on the cabin body.

Further, the switch cover device of the heat preservation cabin is characterized in that threads of the worm and the worm wheel are trapezoidal threads, and the servo motor is provided with a band-type brake.

Further, the switch cover device of the heat preservation cabin further comprises a controller, a motor driver, an in-place opening proximity switch and an in-place closing proximity switch, wherein the in-place opening proximity switch and the in-place closing proximity switch are arranged on the cabin cover; the controller is connected with an uncovering button and a closing button, the uncovering button is used for triggering an uncovering instruction, and the closing button is used for triggering a closing instruction.

Further, the switch cover device of the heat preservation cabin further comprises an upper computer in communication connection with the controller, and the controller is connected with a switching knob for switching between a local control mode and a remote control mode.

Compared with the prior art, the switch cover device of the heat preservation cabin has the following advantages: the invention arranges the servo motor, the transmission shaft and two electric cylinders arranged at intervals, so that the electric cylinders are provided with cylinder bodies, a lower support lug is fixed at the lower end of the cylinder body and is hinged with a lower support seat correspondingly arranged on the cabin body, a lead screw and a worm are arranged in the cylinder body, a worm wheel meshed with the worm is coaxially fixed at the lower end of the lead screw, a nut matched with the screw rod is sleeved on the screw rod, a guide mechanism along the axial direction is arranged between the nut and the cylinder body, the upper side of the nut is coaxially fixed with a piston rod, the upper end of the piston rod extends out of the cylinder body and is fixed with an upper support lug, the upper support lug is hinged with an upper support seat correspondingly arranged on the cabin cover, two ends of a transmission shaft are correspondingly and coaxially connected with the worms of the two electric cylinders through couplers respectively, the servo motor is fixed on the other side of one electric cylinder relative to the transmission shaft, and an output shaft of the servo motor is coaxially connected with the worm of the electric cylinder through the coupler. Therefore, the switch cover device of the heat preservation cabin, which has the advantages of simple structure, convenient control, good synchronism and high reliability, is formed. In practical application, the servo motor is used for driving the electric cylinder to stretch and retract by giving a servo motor signal, so that the cover can be opened and closed. According to the invention, the electric cylinders are used as the execution components, the worms of the two electric cylinders are connected through the transmission shaft, and the servo motor is fixed on one electric cylinder, so that the integrated design of the driving control and the execution mechanism is realized. Meanwhile, the electric cylinders are provided with the worm and worm gear transmission pair, so that the purposes of speed reduction and torque amplification are achieved, the transmission shaft is connected with the worms of the two electric cylinders by adopting the shaft coupling, the synchronism of actions of the two cylinders is ensured by utilizing rigid transmission, and the opening and closing requirements of the large-span (more than 3 m) hatch cover can be completely met.

The following describes a thermal insulation cabin switch cover device in further detail with reference to the specific embodiments shown in the drawings.

Drawings

FIG. 1 is a schematic view of an installation state of a switch cover device of a thermal insulation cabin according to the present invention;

FIG. 2 is a schematic power transmission diagram of an insulation cabin switch cover device according to the present invention;

FIG. 3 is an enlarged view of position A of FIG. 2;

FIG. 4 is an enlarged view of the location B in FIG. 2;

FIG. 5 is a sectional view of an electric cylinder in an opening and closing cover device of a thermal insulation compartment according to the present invention;

FIG. 6 is a connection diagram of the control relationship of the cover opening and closing device of the thermal insulation cabin.

Detailed Description

First, it should be noted that, the directional terms such as up, down, left, right, front, rear, etc. described in the present invention are only described with reference to the accompanying drawings for easy understanding, and do not limit the technical solution and the claimed scope of the present invention.

As shown in fig. 1 to 5, the embodiment of the cover opening and closing device for the thermal insulation cabin of the present invention includes a servo motor 1, a transmission shaft 2 and two electric cylinders 3 arranged at intervals. The electric cylinder 3 is provided with a cylinder body 31, a lower lug 32 is fixed to the lower end of the cylinder body 31, and the lower lug 32 is hinged to a lower support 101 correspondingly provided on the cabin 100. A screw 33 and a worm 34 are provided in the cylinder 31, a worm wheel 331 that meshes with the worm 34 is coaxially fixed to a lower end of the screw 33, and a nut 35 that engages with the screw 33 is fitted over the screw 33. An axial guide mechanism is arranged between the nut 35 and the cylinder 31, the piston rod 36 is coaxially fixed on the upper side of the nut 35, the upper end of the piston rod 36 extends out of the cylinder 31 and is fixed with an upper lug 37, and the upper lug 37 is hinged with an upper support 201 correspondingly arranged on the hatch cover 200. Two ends of the transmission shaft 2 are respectively and correspondingly coaxially connected with the worms 34 of the two electric cylinders 3 through the shaft couplings 4. The servo motor 1 is fixed on the other side of an electric cylinder 3 relative to the transmission shaft 2, and the output shaft of the servo motor 1 is coaxially connected with the worm 34 of the electric cylinder 3 through the coupling 4.

The heat-preservation cabin opening and closing cover device is simple in structure, convenient to control, good in synchronism and high in reliability. In practical application, the servo motor 1 is given to drive the electric cylinder 3 to extend and retract through the servo motor 1, and the cover can be opened and closed. According to the invention, the electric cylinders 3 are used as the execution components, the worms 34 of the two electric cylinders 3 are connected through the transmission shaft 2, and the servo motor 1 is fixed on one electric cylinder 3, so that the integrated design of the driving control and the execution mechanism is realized. Meanwhile, the electric cylinders 3 are provided with worm and worm gear transmission pairs, so that the purposes of speed reduction and torque amplification are achieved, the transmission shaft 2 is connected with the worms 34 of the two electric cylinders 3 by adopting the coupler 4, the synchronism of actions of the two cylinders is ensured by utilizing rigid transmission, and the opening and closing requirements of a large-span (more than 3 m) hatch cover can be completely met. It should be noted that, in practical application, in order to implement stopping locking at any position, the worm 34 and the worm wheel 331 adopt trapezoidal threads, and the servo motor 1 is provided with a band-type brake, so as to enhance the reliability of locking. In addition, the cabin body 100 and the cabin cover 200 of the thermal insulation cabin are hinged, so that the cabin cover 200 can rotate around a hinge shaft; the figure shows only one side of the cabin and the hatch, which is usually also provided with a symmetrical construction.

As an optimized scheme, in the present embodiment, a hand wheel 5 is disposed on the other side of an electric cylinder 3 relative to a transmission shaft 2, and the hand wheel 5 is coaxially and fixedly connected with a worm 34 of the electric cylinder 3. Wherein, the hand wheel 5 and the servo motor 1 are respectively arranged on two different electric cylinders 3. According to the structure, when the servo motor 1 breaks down or is powered off, manual cover opening and closing operation can be achieved by rotating the hand wheel 5, and functionality and practicability are enhanced. It should be noted that the brake of the servo motor 1 should be opened before the manual lid opening and closing operation is performed by the hand wheel 5. Meanwhile, in the present embodiment, the swing arm 6 is disposed between the two electric cylinders 1, one end of the swing arm 6 is sleeved on the transmission shaft 2, the deep groove ball bearing 61 is disposed between the two electric cylinders, and the other end of the swing arm 6 is hinged to the lower support 101 correspondingly disposed on the cabin 100. For the large-span hatch cover, the structural stability and the rotating stability of the transmission shaft are enhanced by arranging the swing arms 6, and the number of the swing arms 6 is specifically set according to the span of the hatch cover and the distance between the two electric cylinders 3.

As a specific embodiment, the present invention provides that the cylinder 31 is provided with a base 311 and a cylinder 312 screwed on the base 311, and the cylinder 312 is provided with an extension approach switch 38 and a reception approach switch 38', wherein the lower lug 32 is fixed on the bottom of the base 311 by a bolt. The arrangement improves the convenience of disassembly, assembly and maintenance by adopting a split structure and connecting the cylinder body 31 through threads; by arranging the extension approach switch 38 and the reception approach switch 38', the extension and retraction of the electric cylinder 3 can be accurately controlled by using the in-place signals of the extension approach switch and the reception approach switch, and the reliability of the action of opening and closing the cover is improved. As a specific embodiment, the invention adopts the following mounting modes for the screw 33 and the worm 34: an upper positioning sleeve 332 and a lower positioning sleeve 333 are correspondingly arranged on the screw rod 33 on the upper side and the lower side of the worm wheel 331, and a first bearing 334 and a second bearing 335 are correspondingly clamped between the upper positioning sleeve 332, the lower positioning sleeve 333 and the base 311; third bearings 341 are respectively clamped between both ends of the worm 34 and the base 311. In practical applications, the present invention generally uses angular contact ball bearings for the first bearing 334 and the second bearing 335 to improve the stability and reliability of the supporting load.

As a specific embodiment, the present invention adopts the following method for the guide mechanism between the nut 35 and the cylinder 31: a collar 351 is provided on the outer wall of the nut 35, a guide groove in the axial direction is provided on the collar 351, and a guide bar 313 in the axial direction is fixed to the inner wall of the cylinder 312 so that the guide bar 313 is positioned in the guide groove of the collar 351. The guiding mechanism has the characteristics of simple structure, easy realization and stable guiding. For ease of disassembly and maintenance, this embodiment has the lower end of the piston rod 36 threadably mounted on the nut 35 and the upper lug 37 threadably mounted on the piston rod 36. In order to enhance the structure and improve the stability of the operation, the first support sleeve 336 and the second support sleeve 314 are fixed on the upper ends of the lead screw 33 and the cylinder 312, and the inner and outer walls of the piston rod 36 are slidably engaged with the first support sleeve 336 and the second support sleeve 314. To reduce wear, the present invention typically provides a guide strip and oil reservoir on the peripheral wall of the first support sleeve 336.

As an optimized solution, as shown in fig. 6, the present embodiment is further provided with a controller 7, a motor driver 8, and an open-position proximity switch 9 and a close-position proximity switch 9' provided on the hatch 200. The controller 7 is connected with the motor driver 8 through a CAN bus, the motor driver 8 is connected with the motor 1 and the proximity switches 38 and 38 'in the two electric cylinders 3, the proximity switches 9 in the on position and 9' in the off position are connected with the controller 7 through cables, the controller 7 is connected with a cover opening button 71 and a cover closing button 72, the cover opening button 71 is used for triggering a cover opening instruction, and the cover closing button 72 is used for triggering a cover closing instruction. According to the structure, the in-place proximity switch 9 ' and the extending proximity switch 38 ' are triggered to be in-place signals through the receiving proximity switch 38 ', so that the convenience and the accuracy of control are improved, wherein the in-place proximity switch 9 and the extending proximity switches 38 on the two electric cylinders 3 form redundancy, the in-place proximity switch 9 ' and the receiving proximity switches 38 ' on the two electric cylinders 3 form redundancy, and the reliability of the in-place judgment of opening and closing of the hatch cover is guaranteed. In order to realize remote control, the embodiment further provides an upper computer (not shown in the figure) in communication connection with the controller 7, and the controller 7 is connected with a switching knob 73 for switching between the local control mode and the remote control mode, so that the functionality and the practicability are enhanced.

To assist the skilled person in understanding the present invention, the following description is given for a brief explanation of the manner of controlling the cover opening and closing device of the thermal insulating compartment.

Firstly, the control mode is switched to the local control mode by the switching knob 73.

Secondly, the uncovering button 71 is pressed, after the controller 7 detects an uncovering instruction, a forward rotation instruction and a speed value are sent to the servo motor 1 through the CAN bus and the motor driver 8, the servo motor 1 rotates forward, the electric cylinder 3 extends, and the hatch cover 200 is opened gradually.

Thirdly, when the cover opening button 71 is released or the hatch cover 200 is opened in place, the on-position approaching switch 9 triggers an on-position signal, and the servo motor 1 stops; when the servo motor 1 runs continuously in a fault, the extension approach switch 38 triggers an extension signal, and the motor driver 8 stops the servo motor 1 immediately after receiving the extension signal so as to prevent the mechanical structure from running continuously and causing damage.

And fourthly, pressing a cover closing button 72, after detecting a cover closing instruction, the controller 7 sends a reverse instruction and a speed value to the servo motor 1 through the CAN bus and the motor driver 8, the servo motor 1 runs in a reverse mode, the electric cylinder 3 does withdrawing action, and the hatch cover 200 is gradually closed.

Fifthly, when the cover closing button 72 is released or the hatch cover 200 is closed in place, the closing in-place proximity switch 9' triggers a closing in-place signal, and the servo motor 1 stops; when the servo motor 1 runs continuously in a fault, the received bit proximity switch 38' triggers a received bit signal, and the motor driver 8 stops the servo motor 1 immediately after receiving the received bit signal so as to prevent the mechanical structure from being damaged due to continuous running.

Sixthly, the control mode is switched to the remote control mode through the switching knob 73, the cover opening button 71 and the cover closing button 72 are invalid, remote cover opening and closing operation is carried out through the upper computer, the control mode is similar to the local control mode, and repeated description is omitted.

The above examples are only for describing the preferred embodiments of the present invention, and do not limit the scope of the claimed invention, and various modifications made by those skilled in the art according to the technical solutions of the present invention should fall within the scope of the invention defined by the claims without departing from the design concept of the present invention.