Protective device for separation of combined part and compressor

Abstract

The utility model relates to a protective device for separation of a combined part and a compressor. The protection device for separation of the combined part comprises a first part and a second part, a second member; the connecting piece is sequentially connected with the first component and the second component; and the air bag is arranged on the first component and surrounds the connecting piece, and the air bag is configured to expand in response to separation of the first component and the second component and wrap the connecting piece. Due to the fact that the connecting piece is loosened, the first component is separated from the second component, the air bag is expanded in response to the separation of the first component and the second component, the connecting piece is wrapped in the air bag, the connecting piece is prevented from colliding with other components after falling off, and then potential safety hazards are prevented.

Description

Technical Field

[0001] The utility model relates to the field of protection and warning equipment, in particular to a protection device for the detachment of a combined component and a compressor. Background Art

[0002] In some related technologies, a semi-hermetic screw compressor includes a cantilever. The end of the cantilever restricts the axial movement of the motor through a gland, and the gland is fastened by a bolt passing through the axis. During use, there is a problem that the gland may fall off and bump the motor winding of the compressor, resulting in the burning of the motor. Summary of the Utility Model

[0003] Some embodiments of the utility model provide a protection device for the detachment of a combined component and a compressor, which is used to reduce the collision damage to other components after the detachment of the combined component.

[0004] In one aspect of the utility model, a protection device for the detachment of a combined component is provided, including:

[0005] A first component;

[0006] A second component;

[0007] A connecting member that sequentially connects the first component and the second component; and

[0008] An airbag is provided on the first component and is arranged around the connecting member. The airbag is configured to expand in response to the detachment of the first component and the second component, and cover the connecting member.

[0009] In some embodiments, the protection device for the detachment of a combined component further includes:

[0010] A third component, which is arranged in the direction of the first component away from the second component; and

[0011] A first switch is provided on the third component. The first switch is configured to emit a warning signal in a state of being pushed by the expansion of the airbag.

[0012] In some embodiments, the protection device for the detachment of a combined component further includes a controller. The controller is electrically connected to the second component and the first switch. The controller is configured to control the movement of the second component and stop the movement of the second component after receiving the warning signal from the first switch.

[0013] In some embodiments, an annular groove is provided on the first component around the position where the connecting member passes through, and the airbag is arranged in the annular groove.

[0014] In some embodiments, the protection device for the detachment of the combined components further includes a piezoelectric trigger, which is disposed between the connecting member and the first component in a squeezed manner, and the piezoelectric trigger is configured to emit a signal for controlling the inflation of the airbag in response to the detachment of the first component and the second component.

[0015] In some embodiments, a first hole is provided on the first component, a part of the piezoelectric trigger is disposed in the first hole, and another part of the piezoelectric trigger is located outside the first hole.

[0016] In some embodiments, the protection device for the detachment of the combined components further includes a second switch, which is connected in series to the control circuit where the piezoelectric trigger and the airbag are located. The second switch is configured to cut off the control circuit during the process that the connecting member squeezes the piezoelectric trigger to connect the first component and the second component, and the second switch is configured to connect the control circuit in response to the detachment of the first component and the second component and before the piezoelectric trigger emits a signal.

[0017] In some embodiments, the second switch is disposed between the connecting member and the first component in a squeezed manner, and the second switch is configured to be squeezed by the connecting member synchronously with the piezoelectric trigger after the connecting member squeezes the piezoelectric trigger to reach a first stroke.

[0018] In some embodiments, the second switch is configured to be squeezed by the connecting member synchronously with the piezoelectric trigger, and after the piezoelectric trigger is squeezed to reach a second stroke, the second switch cuts off the control circuit.

[0019] In some embodiments, the piezoelectric trigger is configured to complete energy storage after the second switch cuts off the control circuit and is squeezed by the connecting member to reach a third stroke; the connecting member is configured to complete the connection of the first component and the second component after the piezoelectric trigger completes energy storage.

[0020] In some embodiments, the first stroke is one-third of the total stroke required for the piezoelectric trigger to complete energy storage, the second stroke is one-third of the total stroke required for the piezoelectric trigger to complete energy storage, and the third stroke is one-third of the total stroke required for the piezoelectric trigger to complete energy storage.

[0021] In some embodiments, a second hole is provided on the first component, a part of the second switch is disposed in the second hole, and another part of the second switch is located outside the second hole.

[0022] In some embodiments, a first hole is provided on the first component, a part of the piezoelectric trigger is disposed in the first hole, and another part of the piezoelectric trigger is located outside the first hole; the part of the piezoelectric trigger located outside the first hole abuts against the connecting member prior to the part of the second switch located outside the first hole.

[0023] In some embodiments, a cover plate is provided on a side of the airbag away from the first component, and the cover plate is configured to abut against the panel of the first switch after the airbag expands.

[0024] In one aspect of the present utility model, a compressor is provided, including the protection device for the detachment of the above-mentioned combined components, wherein the first component is the gland of the compressor, and the second component is the rotating shaft of the compressor.

[0025] In some embodiments, the protection device for the detachment of the combined components further includes:

[0026] A third component, disposed in a direction away from the rotating shaft of the gland, and the third component is the suction filter of the compressor; and

[0027] A first switch, disposed on the suction filter, and the first switch is configured to emit a warning signal in a state of being pushed by the expansion of the airbag.

[0028] Based on the above technical solutions, the present utility model has at least the following beneficial effects:

[0029] In some embodiments, the protection device for the detachment of the combined components includes a first component, a second component, a connecting member, and an airbag. The connecting member sequentially connects the first component and the second component. The airbag is disposed on the first component and is arranged around the connecting member. The airbag is configured to expand in response to the detachment of the first component and the second component, and wrap the connecting member. Since the loosening of the connecting member will cause the detachment of the first component and the second component, the airbag expands in response to the detachment of the first component and the second component, and wraps the connecting member in the airbag, preventing the connecting member from colliding with other components after falling off, thereby preventing potential safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0031] Figure 1 It is a schematic structural diagram of the protection device for the detachment of the combined components according to some embodiments of the present utility model;

[0032] Figure 2Schematic diagram of a piezoelectric trigger and an uncompressed second switch provided according to some embodiments of the present utility model;

[0033] Figure 3 Schematic diagram of a protection device for the separation of a combined component in an inflated state of an airbag provided according to some embodiments of the present utility model.

[0034] The reference numerals in the drawings are explained as follows:

[0035] 1 - First component; 1a - gland; 2 - Second component; 2a - rotating shaft; 3 - connecting member; 4 - airbag; 5 - Third component; 5a - filter; 6 - First switch; 7 - piezoelectric trigger; 8 - Second switch; 9 - cover plate; 10 - gasket.

[0036] It should be understood that the dimensions of the various parts shown in the drawings are not drawn according to actual proportional relationships. In addition, the same or similar reference numerals represent the same or similar components. Detailed implementation manners

[0037] Now, various exemplary embodiments of the present utility model will be described in detail with reference to the drawings. The description of the exemplary embodiments is merely illustrative and in no way limits the present utility model and its application or use. The present utility model can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present utility model thorough and complete and to fully convey the scope of the present utility model to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, the components of materials, numerical expressions, and numerical values set forth in these embodiments should be construed as merely exemplary and not as limitations.

[0038] The "first", "second", and similar terms used in the present utility model do not denote any order, quantity, or importance, but are merely used to distinguish different parts. Terms such as "including" or "comprising" mean that the elements before the term cover the elements listed after the term and do not exclude the possibility of also covering other elements. "Upper", "lower", "left", "right", etc. are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0039] In the present utility model, when it is described that a specific device is located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device. When it is described that a specific device is connected to other devices, the specific device may be directly connected to the other devices without an intermediate device, or may not be directly connected to the other devices and have an intermediate device.

[0040] All terms used in this utility model (including technical terms or scientific terms) have the same meaning as understood by those of ordinary skill in the art to which this utility model pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless specifically defined as such herein.

[0041] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the specification.

[0042] Figure 1 is a schematic structural diagram of some embodiments of a protection device for the detachment of combined components according to the present utility model. Refer to Figure 1 In some embodiments, the protection device for the detachment of combined components includes a first component 1, a second component 2, a connecting member 3, and an airbag 4.

[0043] The connecting member 3 sequentially connects the first component 1 and the second component 2.

[0044] The airbag 4 is provided on the first component 1 and is disposed around the connecting member 3. The airbag 4 is configured to expand in response to the detachment of the first component 1 and the second component 2, and cover the connecting member 3 (refer to Figure 3 ).

[0045] In the above embodiment, if the connecting member 3 becomes loose, it will cause the detachment of the first component 1 and the second component 2. The airbag 4 expands in response to the detachment of the first component 1 and the second component 2, covering the connecting member 3 in the airbag 4, preventing the connecting member 3 from colliding with other components after detachment, and thus preventing potential safety hazards.

[0046] In some embodiments, the connecting member 3 includes a bolt. The bolt sequentially connects the first component 1 and the second component 2.

[0047] In some embodiments, the first component 1 can be the gland 1a of a compressor, the second component 2 can be the rotating shaft 2a of the compressor, and the connecting member 3 connects the gland 1a and the rotating shaft 2a.

[0048] In the case where the connecting member 3 becomes loose and the gland 1a and the rotating shaft 2a become detached, the airbag 4 expands in response to the detachment of the gland 1a and the rotating shaft 2a, covering the connecting member 3 in the airbag 4, which can prevent the connecting member 3 from colliding with the motor winding in the compressor after detachment, causing damage to the motor, and thus preventing potential safety hazards.

[0049] In some embodiments, the protection device for the detachment of combined components further includes a third component 5 and a first switch 6.

[0050] The third component 5 is disposed in the direction away from the second component 2 of the first component 1.

[0051] The first switch 6 is disposed on the third component 5, and the first switch 6 is configured to emit a warning signal in a state of being inflated and pushed by the airbag 4.

[0052] In the above embodiment, the first switch 6 is in a normally open state. The airbag 4 expands and pushes the first switch 6, causing the first switch 6 to be in a closed state, and the first switch 6 emits a warning signal outward.

[0053] In the above embodiment, the connecting member 3 becomes loose, the first component 1 is separated from the second component 2, the airbag 4 expands and pushes the first switch 6, and the first switch 6 emits a warning signal outward, which can remind the corresponding personnel of the problem that the first component 1 is separated from the second component 2, playing a warning role, and can also remind the corresponding personnel to stop the operation of the equipment and perform maintenance on the fault.

[0054] Furthermore, the airbag 4 expands and pushes the first switch 6 on the third component 5, which can limit the airbag 4 and the first component 1 between the third component 5 and the second component 2, preventing the first component 1 from detaching and causing collision damage to other components.

[0055] In some embodiments, the third component 5 is the suction filter 5a of the compressor. The suction filter 5a is disposed at the suction end of the compressor. The rotating shaft 2a and the suction filter 5a are axially spaced apart, and the gland 1a is disposed at the end of the rotating shaft 2a adjacent to the suction filter 5a. When the connecting member 3 becomes loose and the gland 1a and the rotating shaft 2a are separated, the airbag 4 expands and pushes the first switch 6, causing the first switch 6 to close and emit a warning signal, which can remind the corresponding personnel that the gland 1a and the rotating shaft 2a are separated, solving the problem that the gland 1a of the compressor cannot be warned of falling off, and facilitating after-sales fault maintenance of the compressor.

[0056] At the same time, the airbag 4 expands and pushes the first switch 6 on the suction filter 5a, and the airbag 4, the connecting member 3 and the gland 1a are limited between the suction filter 5a and the rotating shaft 2a, which can prevent the gland 1a and the rotating shaft 2a from being separated and causing collision damage to the motor winding.

[0057] In some embodiments, the protection device for the separation of the combined components further includes a controller. The controller is electrically connected to the second component 2 and the first switch 6. The controller is configured to control the movement of the second component 2 and to control the second component 2 to stop moving after receiving the warning signal from the first switch 6.

[0058] In the above embodiment, the second component 2 is a moving component. Since the first component 1 and the second component 2 are connected by the connecting member 3, during the movement of the second component 2, the first component 1 will move with the second component 2, and the movement and stop of the second component 2 are controlled by the controller.

[0059] The controller is electrically connected to the first switch 6. After receiving the warning signal from the first switch 6, it indicates that there is a problem of loosening of the connecting member 3 and the separation of the first component 1 from the second component 2. Therefore, in order to prevent the second component 2 from continuing to operate in the event of a fault, the controller controls the second component 2 to stop moving for fault repair to avoid the equipment running with a fault and generating potential safety hazards.

[0060] In some embodiments, the second component 2 includes the rotating shaft 2a of the compressor. The controller is electrically connected to the power mechanism of the rotating shaft 2a and the first switch 6. The controller is configured to control the movement of the rotating shaft 2a and to control the rotating shaft 2a to stop rotating after receiving the warning signal from the first switch 6, so as to avoid the compressor running with a fault and generating potential safety hazards.

[0061] In some embodiments, an annular groove is provided on the first component 1 around the penetration position of the connecting member 3, and the airbag 4 is arranged in the annular groove.

[0062] In the above embodiments, the annular groove is provided on the first component 1 and the airbag 4 is arranged in the annular groove, which can realize the position fixation of the airbag 4 and the first component 1, and can make the airbag 4 expand uniformly. After the first component 1 is separated from the second component 2, the airbag 4 will move with the first component 1 and circumferentially wrap the connecting member 3 to improve the protection effect. The airbag 4 provides circumferential protection for the connecting member 3, which can effectively prevent the connecting member 3 from separating from the first component 1 and avoid the connecting member 3 causing impact damage to other components.

[0063] Moreover, the airbag 4 is arranged in the annular groove on the first component 1. After the first component 1 is separated from the second component 2, it can move with the first component 1 and collide with and push the first switch 6 to quickly trigger the first switch 6 to send out a warning signal, improving the rapidity, timeliness and accuracy of the warning, avoiding the equipment running with a fault and improving the safety.

[0064] In some embodiments, the protection device for the separation of the combined components further includes a piezoelectric trigger 7. The piezoelectric trigger 7 is arranged between the connecting member 3 and the first component 1 in a squeezed manner. The piezoelectric trigger 7 is configured to send out a signal for controlling the expansion of the airbag 4 in response to the separation of the first component 1 from the second component 2.

[0065] In the above embodiments, the piezoelectric trigger 7 can be compressed. When the piezoelectric trigger 7 is compressed, it stores elastic potential energy, and when the piezoelectric trigger 7 restores its elastic deformation, it releases electrical energy. Since the piezoelectric trigger 7 can quickly restore its elastic deformation, it can release electrical energy in a very short time and has fast responsiveness. And the piezoelectric trigger 7 is very sensitive to the compression and release processes and has high sensitivity.

[0066] The piezoelectric trigger 7 is squeezed and arranged between the connecting member 3 and the first component 1, storing elastic potential energy. When the connecting member 3 is loosened and the first component 1 is separated from the second component 2, the squeezing force of the connecting member 3 and the first component 1 on the piezoelectric trigger 7 is reduced, and the piezoelectric trigger 7 restores its deformation to release electrical energy, sending a signal to control the expansion of the airbag 4.

[0067] Since the piezoelectric trigger 7 is squeezed and arranged between the connecting member 3 and the first component 1, it can respond quickly when the connecting member 3 is loose, thereby improving the timeliness and accuracy of early warning and protection, avoiding the safety hazards caused by the separation of the first component 1 and the second component 2, and improving the safety of the equipment.

[0068] In the above embodiment, the piezoelectric trigger 7 sends a signal for controlling the expansion of the airbag 4 in response to the separation of the first component 1 and the second component 2, including at least two specific implementations.

[0069] In the first implementation mode, the piezoelectric trigger 7 includes a piezoelectric part and a trigger part. The piezoelectric part sends a signal to control the expansion of the airbag 4 in response to the separation of the first component 1 and the second component 2, and releases electric energy. The trigger part receives the signal and electric energy sent by the piezoelectric part, and uses the electric energy to generate an electric spark to cause the pre-installed inflator in the airbag 4 to react, quickly generate a large amount of gas, and make the airbag 4 expand and extend, providing timely protection and early warning.

[0070] In the second implementation, the airbag 4 includes a control component and an ignition component. The control component sends a signal to control the expansion of the airbag 4 in response to the separation of the first component 1 and the second component 2. After receiving the signal, the ignition component starts ignition, causing the preset inflator in the airbag 4 to react, quickly generating a large amount of gas, causing the airbag 4 to expand and extend, providing timely protection and early warning.

[0071] In some embodiments, the inflator pre-placed in the airbag 4 includes solid fuel, such as sodium azide (NaN3), etc. A large amount of gas is rapidly generated during the combustion of the inflator, and the gas is usually nitrogen (N2).

[0072] In some embodiments, a first hole is provided on the first component 1, a portion of the piezoelectric trigger 7 is provided in the first hole, and another portion of the piezoelectric trigger 7 is located outside the first hole.

[0073] In the above embodiment, a first hole is provided on the first component 1, and a piezoelectric trigger 7 is arranged in the first hole. The structure is simple, and a part of the piezoelectric trigger 7 is arranged in the first hole, while another part of the piezoelectric trigger 7 is located outside the first hole. The part of the piezoelectric trigger 7 located outside the first hole can be in direct contact and abutment with the connecting member 3. The piezoelectric trigger 7 is compressed by the connecting member 3 to store energy. After the connecting member 3 becomes loose and the extrusion force of the connecting member 3 on the piezoelectric trigger 7 decreases, the piezoelectric trigger 7 can quickly respond to the change of the connecting member 3, with relatively high sensitivity and reliability.

[0074] In some embodiments, the first hole is located inside the airbag 4.

[0075] Reference Figure 2 , in some embodiments, the protection device for the detachment of the combined component further includes a second switch 8. The second switch 8 is connected in series to the control circuit where the piezoelectric trigger 7 and the airbag 4 are located. The second switch 8 is configured to cut off the control circuit during the process of the connecting member 3 extruding the piezoelectric trigger 7 to connect the first component 1 and the second component 2, and the second switch 8 is configured to connect the control circuit in response to the detachment of the first component 1 and the second component 2 and before the piezoelectric trigger 7 emits a signal.

[0076] In the above embodiment, the second switch 8 can be compressed. When the second switch 8 is pressed down, it is in an open state and the control circuit is disconnected. When the second switch 8 resumes deformation and bounces back, it is in a closed state and the control circuit is connected.

[0077] The second switch 8 cuts off the control circuit during the process of the connecting member 3 extruding the piezoelectric trigger 7 to connect the first component 1 and the second component 2, which can prevent the piezoelectric trigger 7 from misoperating and restoring deformation to release electrical energy and emitting a signal to control the inflation of the airbag 4 during the extrusion process of the piezoelectric trigger 7, thus generating a false alarm. The second switch 8 can also connect the control circuit in response to the detachment of the first component 1 and the second component 2 and before the piezoelectric trigger 7 emits a signal, so that when the piezoelectric trigger 7 emits a signal, the control circuit forms a loop, and the signal emitted by the piezoelectric trigger 7 can be sent to the airbag 4 to cause the airbag 4 to inflate.

[0078] Therefore, the setting of the second switch 8 can prevent the piezoelectric trigger 7 from emitting a false signal to control the inflation of the airbag 4 due to misoperation during the process of connecting the first component 1 and the second component 2 by extruding the piezoelectric trigger 7 with the connecting member 3, and can improve the accuracy of device protection and warning.

[0079] In some embodiments, the second switch 8 is arranged to be extruded between the connecting member 3 and the first component 1, and the second switch 8 is configured to be extruded by the connecting member 3 synchronously with the piezoelectric trigger 7 after the connecting member 3 extrudes the piezoelectric trigger 7 to reach the first stroke.

[0080] In the above embodiments, when the piezoelectric trigger 7 is squeezed to reach the first stroke and continues to be squeezed, the second switch 8 and the piezoelectric trigger 7 are synchronously squeezed by the connecting member 3, which can accurately feedback the state of the piezoelectric trigger 7 being squeezed, so as to timely cut off the control circuit and prevent the piezoelectric trigger 7 from storing sufficient elastic potential energy during the subsequent continuous squeezing process of the piezoelectric trigger 7, and then due to misoperation, the piezoelectric trigger 7 releases electric energy and sends a signal to control the inflation of the airbag 4.

[0081] In some embodiments, the second switch 8 is configured to be synchronously squeezed by the connecting member 3 with the piezoelectric trigger 7, and after the piezoelectric trigger 7 is squeezed to reach the second stroke, the second switch 8 cuts off the control circuit.

[0082] In the above embodiments, after the piezoelectric trigger 7 is squeezed to reach the second stroke, it means that the piezoelectric trigger 7 may store potential energy capable of sending a signal. Therefore, setting the squeezing state of the second switch 8 to cut off the control circuit after the second switch 8 is synchronously squeezed with the piezoelectric trigger 7 and reaches the second stroke of the piezoelectric trigger 7 can improve the timeliness and accuracy of cutting off the control circuit and prevent misoperation from sending out wrong signals.

[0083] At the same time, during the process of the piezoelectric trigger 7 recovering from deformation, when the piezoelectric trigger 7 returns to the starting position of the second stroke, the second switch 8 can connect the control circuit. When the piezoelectric trigger 7 returns to the starting position of the first stroke (i.e., the position where the deformation is completely recovered) and sends a signal, it can ensure that the control circuit is connected.

[0084] Therefore, the setting of the second switch 8 can not only prevent the piezoelectric trigger 7 from sending out false alarms due to misoperation during the process of the connecting member 3 squeezing and connecting the first component 1 and the second component 2, but also timely connect the control circuit during the process of the connecting member 3 loosening and the first component 1 and the second component 2 separating, without preventing the piezoelectric trigger 7 from sending a signal to control the inflation of the airbag 4.

[0085] In some embodiments, the piezoelectric trigger 7 is configured to complete energy storage after the second switch 8 cuts off the control circuit and is squeezed by the connecting member 3 to reach the third stroke; the connecting member 3 is configured to complete the connection of the first component 1 and the second component 2 after the piezoelectric trigger 7 completes energy storage.

[0086] In the above embodiments, after the piezoelectric trigger 7 is squeezed by the connecting member 3 to reach the second stroke, the second switch 8 cuts off the control circuit. At this time, the piezoelectric trigger 7 is continuously squeezed to enable the piezoelectric trigger 7 to complete energy storage. The total stroke of the piezoelectric trigger 7 is set to be adapted to the stroke of the connecting member 3 connecting the first component 1 and the second component 2, so that while the connecting member 3 completes the connection of the first component 1 and the second component 2, the piezoelectric trigger 7 can complete energy storage, cleverly utilizing the cooperation between the mechanical mechanism and the electronic control to improve the accuracy and sensitivity of the control.

[0087] In some embodiments, the first stroke is one-third of the total stroke required for the piezoelectric trigger 7 to complete energy storage, the second stroke is one-third of the total stroke required for the piezoelectric trigger 7 to complete energy storage, and the third stroke is one-third of the total stroke required for the piezoelectric trigger 7 to complete energy storage.

[0088] In the above embodiments, in order to prevent misoperation, the 1 / 3 stroke segmentation method is adopted, and the total stroke of the piezoelectric trigger 7 is divided into 3 segments, each segment being 1 / 3 of the total stroke of the piezoelectric trigger 7.

[0089] The first segment is the basic stroke. When the connecting member 3 presses down to enable the piezoelectric trigger 7 to complete the first 1 / 3 of the total stroke, the second switch 8 will be synchronously contacted. At this time, when the connecting member 3 continues to press down, the piezoelectric trigger 7 and the second switch 8 can be pressed down synchronously. When the piezoelectric trigger 7 is squeezed to reach the second 1 / 3 of the total stroke, the second switch 8 starts to disconnect. Since the second switch 8 and the piezoelectric trigger 7 are connected in series in the control circuit, after the piezoelectric trigger 7 is pressed to 2 / 3 of the total stroke, the contacts of the second switch 8 start to separate and cut off the control circuit, ensuring that after the last 1 / 3 of the total stroke of the piezoelectric trigger 7, the piezoelectric trigger 7 can complete energy storage. When the piezoelectric trigger 7 is completely pressed, the second switch 8 is completely disconnected, the control circuit is disconnected, and the pressing of the contact generator 7 is completed and the energy storage is completed. At this time, the connecting member 3 can complete the connection of the first component 1 and the second component 2. That is to say, the bolt tightens the gland 1a and the rotating shaft 2a.

[0090] In the above embodiments, dividing the stroke of the piezoelectric trigger 7 into three equal parts can more finely control the response of the piezoelectric trigger 7, realize the cooperation with the stroke of the second switch 8, ensure that each stroke stage proceeds according to the predetermined requirements, enable the second switch 8 to play the corresponding role, and enable the piezoelectric trigger 7 to store or release energy.

[0091] Of course, adopting the 1 / 3 stroke segmentation method is only an optional or preferred way, not the only way. As long as after the piezoelectric trigger 7 is squeezed for a certain stroke, the piezoelectric trigger 7 and the second switch 8 are squeezed synchronously, and the second switch 8 cuts off the control circuit before the piezoelectric trigger 7 finishes energy storage, preventing misoperation from causing the piezoelectric trigger 7 to send an incorrect signal; and the second switch connects the control circuit before the piezoelectric trigger 7 releases electrical energy and sends a signal, which will not affect the piezoelectric trigger 7 from sending an alarm signal.

[0092] In some embodiments, the first component 1 is provided with a second hole, and a part of the second switch 8 is disposed in the second hole, and another part of the second switch 8 is located outside the second hole.

[0093] In the above embodiment, the second hole is provided on the first component 1, and the second switch 8 is disposed in the second hole. The structure is simple, and a part of the second switch 8 is disposed in the second hole, and another part of the second switch 8 is located outside the second hole. The part of the second switch 8 located outside the second hole can directly contact and abut against the connecting member 3, and the second switch 8 can cut off the control circuit when being squeezed by the connecting member 3. After the connecting member 3 becomes loose and the squeezing force of the connecting member 3 on the second switch 8 decreases, the second switch 8 can respond quickly and connect the circuit, with relatively high sensitivity and reliability.

[0094] In some embodiments, the second hole is located inside the airbag 4.

[0095] In some embodiments, both the first hole and the second hole are located inside the airbag 4, and the first hole and the second hole are oppositely arranged.

[0096] In some embodiments, the first component 1 is provided with a first hole, a part of the piezoelectric trigger 7 is disposed in the first hole, and another part of the piezoelectric trigger 7 is located outside the first hole; the part of the piezoelectric trigger 7 located outside the first hole abuts against the connecting member 3 before the part of the second switch 8 located outside the first hole.

[0097] In the above embodiment, both the piezoelectric trigger 7 and the second switch 8 can be compressed.

[0098] In some embodiments, when the lengths of the piezoelectric trigger 7 and the second switch 8 are the same, a stroke difference can be formed by the height of the installation positions, that is, a stroke difference between the piezoelectric trigger 7 and the second switch 8 is formed by the depths of the first hole and the second hole. For example: the depth of the first hole is less than the depth of the second hole.

[0099] In some other embodiments, the depths of the first hole and the second hole can also be made the same, and a stroke difference between the piezoelectric trigger 7 and the second switch 8 is formed by the different lengths of the piezoelectric trigger 7 and the second switch 8. For example: the length of the piezoelectric trigger 7 is made greater than the length of the second switch 8.

[0100] In the above embodiments, the piezoelectric trigger 7 abuts against the connecting member 3 prior to the second switch 8, and there is a travel difference between the piezoelectric trigger 7 and the second switch 8. This is beneficial in that the second switch 8 cuts off the control circuit before the piezoelectric trigger 7 completes energy storage, preventing misoperation from causing the piezoelectric trigger 7 to send an incorrect signal; and it is also beneficial in that the second switch 8 connects the control circuit before the piezoelectric trigger 7 releases electrical energy and sends a signal, without affecting the piezoelectric trigger 7 from sending an alarm signal.

[0101] Figure 2 Shown is the virtual extended state of the piezoelectric trigger 7 and the second switch 8, and the connecting member 3 is in the compressed position. In fact, after the connecting member 3 is in the compressed position, the piezoelectric trigger 7 and the second switch 8 are compressed back.

[0102] In some embodiments, a cover plate 9 is provided on the side of the airbag 4 away from the first component 1, and the cover plate 9 is configured to abut against the panel of the first switch 6 after the airbag 4 expands.

[0103] In the above embodiments, the cover plate 9 is provided on the airbag 4, and after the airbag 4 expands, the cover plate 9 abuts against the panel of the first switch 6, which can reduce the friction between the airbag 4 and the panel of the first switch 6, prevent the airbag 4 from twisting, affect the stability of the pressure on the first component 1, and cause the first component 1 to fall off from the second component 2.

[0104] In some embodiments, the cover plate 9 is adhesively bonded to the airbag 4.

[0105] In order to avoid the second component 2 moving during the period when the airbag 4 abuts against the first switch 6 of the third component 5, driving the first component 1 and the airbag 4 to move and twist, damaging the stability of the airbag 4, the panel of the first switch 6 is made of a metal panel, and the cover plate 9 of the airbag 6 is made of polytetrafluoroethylene. After the airbag 6 expands and pops out, the cover plate 9 fits with the metal panel of the first switch 6. Since the sliding coefficients of the metal panel and the polytetrafluoroethylene cover plate 9 are both very small, they can slide and roll briefly, so that the airbag 4 does not stick rigidly to the panel of the first switch 6 and twist, which can effectively stabilize the airbag system, avoid losing the pressure of the airbag 4 after twisting, and prevent the first component 1 from falling off from the second component 2.

[0106] Some embodiments of the present utility model further provide a compressor, which includes the protection device for the separation of the combined components in any of the above embodiments, the first component 1 is the gland 1a of the compressor, and the second component 2 is the rotating shaft 2a of the compressor.

[0107] In some embodiments, the compressor includes a housing, a rotating shaft 2a is axially provided in the housing, a motor winding is provided on the outer periphery of the rotating shaft 2a, and a gland 1a is provided at the end of the rotating shaft 2a. The gland 1a is connected to the rotating shaft 2a through a connecting member 3. Optionally, the connecting member 3 includes a bolt.

[0108] Due to the loosening of the connecting member 3, there is a risk that the gland 1a may fall off the rotating shaft 2a. After the gland 1a is separated from the rotating shaft 2a and the gland 1a and the connecting member 3 are separated, the gland 1a and the connecting member 3 will touch the motor winding, posing a safety hazard. Moreover, since there is no warning when the gland 1a falls off and the compressor continues to operate, the gland 1a and the connecting member 3 will damage the motor, causing compressor failure.

[0109] Based on this, in the protection device for the separation of the combined components, the first component 1 is the gland 1a of the compressor, the second component 2 is the rotating shaft 2a of the compressor, and the connecting member 3 connects the gland 1a and the rotating shaft 2a. When the connecting member 3 is loose and the gland 1a and the rotating shaft 2a are about to separate, the airbag 4 expands in response to the separation of the gland 1a and the rotating shaft 2a, wrapping the connecting member 3 in the airbag 4 to prevent the connecting member 3 from colliding with the motor winding after falling off, causing motor damage and further posing a safety hazard problem.

[0110] In some embodiments, the protection device for the separation of the combined components further includes a third component 5 and a first switch 6.

[0111] The third component 5 is arranged in the direction away from the rotating shaft 2a of the gland 1a, and the third component 5 is the suction filter 5a of the compressor.

[0112] The first switch 6 is arranged on the suction filter 5a and is configured to emit a warning signal when in the state of being pushed by the expansion of the airbag 4.

[0113] In the above embodiment, when the connecting member 3 is loose and the gland 1a and the rotating shaft 2a are separated, the airbag 4 expands and pushes the first switch 6, causing the first switch 6 to emit a warning signal, which can remind the corresponding personnel that the gland 1a and the rotating shaft 2a are separated, playing a warning role, and can also remind the corresponding personnel to stop the operation of the compressor for fault repair, solving the problem that the gland 1a of the compressor cannot be warned when it falls off, and facilitating the after-sales fault repair of the compressor.

[0114] Furthermore, the airbag 4 expands and pushes the first switch 6 on the suction filter 5a, which can limit the gland 1a between the suction filter 5a and the rotating shaft 2a to prevent the gland 1a from falling off and causing collision damage to the motor winding.

[0115] In some embodiments, the suction filter 5a is arranged at the suction end of the compressor, the rotating shaft 2a and the suction filter 5a are arranged at an axial interval, and the gland 1a is arranged at the end of the rotating shaft 2a adjacent to the suction filter 5a.

[0116] In some embodiments, the protection device for the separation of the combined components further includes a controller, the controller is electrically connected to the power mechanism of the rotating shaft 2a and the first switch 6, and the controller is configured to control the movement of the rotating shaft 2a and control the rotating shaft 2a to stop moving after receiving the warning signal from the first switch 6.

[0117] The controller included in the protective device for disengagement of the combined components can be a controller built into the compressor. The controller is electrically connected to the power mechanism of the rotating shaft 2a and the first switch 6. The controller sends a signal to the power mechanism to control the movement of the rotating shaft 2a, and after receiving the early warning signal from the first switch 6, it sends a signal to the power mechanism to control the rotating shaft 2a to stop moving.

[0118] In the above embodiment, after receiving the early warning signal from the first switch 6, the controller indicates that the connecting member 3 is loose and the pressure cover 1a and the rotating shaft 2a are detached. Therefore, the airbag 4 opens and covers the connecting member 3 to prevent the connecting member 3 from colliding with the motor winding and damaging the motor winding. The airbag 4 pushes the first switch 6, and the first switch 6 sends a early warning signal to the controller. In order to prevent the rotating shaft 2a from continuing to run in the event of a fault, the controller controls the rotating shaft 2a to stop moving, thereby protecting the compressor motor winding from secondary damage, and facilitating fault inspection and repair of the compressor to avoid the compressor from running with a fault and causing safety hazards.

[0119] In some embodiments, the connector 3 is axially connected to the gland 1a and the rotating shaft 2a, and an annular groove is provided on the end surface of the gland 1a around the connector 3, and the airbag 4 is installed in the annular groove.

[0120] In some embodiments, a first hole is drilled from the end surface of the gland 1a to the inside of the gland 1a, and the first hole is used to place the piezoelectric trigger 7. The first hole is located on the inner side of the annular groove.

[0121] In some embodiments, a second hole is drilled from the end surface of the gland 1a to the inside of the gland 1a, and the second hole is used to place the second switch 8. The second hole is located on the inner side of the annular groove. Optionally, the second hole is arranged opposite to the first hole.

[0122] In some embodiments, the lengths of the piezoelectric trigger 7 and the second switch 8 are consistent, and the depth of the first hole is less than the depth of the second hole, so that the length of the piezoelectric trigger 7 extending out of the first hole is greater than the length of the second switch 8 extending out of the second hole, and the piezoelectric trigger 7 is squeezed by the connecting member 3 before the second switch 8.

[0123] In some embodiments, the connection member 3 comprises a bolt.

[0124] In some embodiments, a gasket 10 is sleeved on the bolt, and the gasket 10 is located between the head of the bolt and the end face of the pressure cover 1a. When the bolt is pre-tightened, the gasket 10 is pressed, and the gasket 10 presses the piezoelectric trigger 7. When the bolt is loosened, the piezoelectric trigger 7 is triggered, and the piezoelectric trigger 7 causes the inflator in the airbag 4 to react, rapidly expand and generate gas, and the airbag 4 is in an extended state.

[0125] refer to Figure 3, after the airbag 4 extends, it first protects the bolt, wraps the bolt in the airbag 4, and prevents the bolt from colliding with the motor winding after falling off. Moreover, after the airbag 4 extends, it presses against the suction filter 5a at the front end of the compressor. A first switch 6 is provided on the suction filter 5a, and the first switch 6 is connected to an external controller, and the controller controls the compressor to stop urgently.

[0126] In order to prevent the rotating shaft 2a from continuing to rotate during the period when the airbag 4 presses against the suction filter 5a, when the rotating shaft 2a rotates, it drives the airbag 4 to rotate and twist, damaging the stability of the airbag 4. Therefore, the panel of the first switch 6 is made of a metal panel, and the cover plate 9 of the airbag 4 is made of polytetrafluoroethylene. After the airbag 4 pops out, the cover plate 9 fits with the metal panel of the first switch 6. Since the sliding coefficients of the metal panel and the polytetrafluoroethylene cover plate 9 are very small, they can slide and roll briefly, so that the airbag 4 does not stick rigidly to the panel of the first switch 6 and twist, which can effectively stabilize the airbag system and prevent the loss of the airbag pressure on the gland 1a after twisting, and the gland 1a falls off from the rotating shaft 2a.

[0127] In the above embodiment, after the airbag 4 opens, it pushes against the first switch 6 on the suction filter 5a, causing the first switch 6 to send a signal to control the compressor to stop urgently. However, there may be a situation where the compressor is restarted without inspection. Therefore, the first switch 6 is set to the normally open state. The airbag 4 pushes against the first switch 6 to make it in the closed state. The first switch 6 sends a signal to the external controller to control the compressor to stop, so as to ensure that during the period when the airbag 4 expands and pushes against the first switch 6, the first switch 6 is always in the closed state until the fault is eliminated, and the compressor can resume starting.

[0128] In some embodiments, the compressor includes a semi-hermetic screw compressor.

[0129] In some embodiments, the shafting of the semi-hermetic screw compressor is a single cantilever structure. A gland 1a is provided at the cantilever end to limit the axial movement of the motor. The gland 1a is fastened to the rotating shaft 2a through a bolt at the axis. When the gland 1a falls off, it will knock against the motor winding of the compressor, resulting in the motor burning out.

[0130] Based on this, the compressor includes a protection device for the separation of combined components. When the connecting piece 3 becomes loose and the gland 1a and the rotating shaft 2a become separated, the airbag 4 expands in response to the separation of the gland 1a and the rotating shaft 2a, wraps the connecting piece 3 in the airbag 4, and prevents the connecting piece 3 from colliding with the motor winding after falling off, causing damage to the motor and further resulting in potential safety hazards.

[0131] Based on the above embodiments of the present utility model, without explicit negation or conflict, the technical features of one embodiment can be beneficially combined with one or more other embodiments.

[0132] Although some specific embodiments of the present utility model have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration purposes and not for limiting the scope of the present utility model. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be equivalently replaced without departing from the scope and spirit of the present utility model. The scope of the present utility model is defined by the appended claims.

Claims

1. A protective device for the detachment of a combined component, characterized in that: include: First component (1); The second component (2); A connecting member (3) connecting the first component (1) and the second component (2) in sequence; and An airbag (4) is provided on the first component (1) and is arranged around the connecting member (3). The airbag (4) is configured to expand in response to the separation of the first component (1) and the second component (2) and to cover the connecting member (3).

2. The protective device for detaching a combined component according to claim 1, characterized in that: Also includes: a third component (5) arranged in a direction where the first component (1) is away from the second component (2); as well as The first switch (6) is provided on the third component (5), and the first switch (6) is configured to send out a warning signal when being pushed by the airbag (4) when it is inflated.

3. The protective device for detaching a combined component according to claim 2, characterized in that: The invention also comprises a controller, the controller being electrically connected to the second component (2) and the first switch (6), the controller being configured to control the movement of the second component (2) and to control the second component (2) to stop moving after receiving a warning signal from the first switch (6).

4. The protective device for detaching a combined component according to claim 1, characterized in that: An annular groove is provided on the first component (1) around the position where the connecting member (3) is inserted, and the airbag (4) is arranged in the annular groove.

5. The protective device for detaching a combined component according to claim 1, characterized in that: It also includes a piezoelectric trigger (7), which is squeezed and arranged between the connecting member (3) and the first component (1), and the piezoelectric trigger (7) is configured to send a signal to control the expansion of the airbag (4) in response to the separation of the first component (1) and the second component (2).

6. The protective device for the detachment of the combined components according to claim 5, characterized in that: The first component (1) is provided with a first hole, a portion of the piezoelectric trigger (7) is arranged in the first hole, and another portion of the piezoelectric trigger (7) is located outside the first hole.

7. The protective device for detaching a combined component according to claim 5, characterized in that: The invention also comprises a second switch (8), wherein the second switch (8) is connected in series to a control circuit in which the piezoelectric trigger (7) and the airbag (4) are located, and the second switch (8) is configured to cut off the control circuit when the connecting member (3) squeezes the piezoelectric trigger (7) to connect the first component (1) and the second component (2), and the second switch (8) is configured to connect the control circuit in response to the separation of the first component (1) and the second component (2) and before the piezoelectric trigger (7) sends a signal.

8. The protective device for detaching a combined component according to claim 7, characterized in that: The second switch (8) is squeezed and arranged between the connecting member (3) and the first component (1), and the second switch (8) is configured to be squeezed by the connecting member (3) synchronously with the piezoelectric trigger (7) after the connecting member (3) squeezes the piezoelectric trigger (7) to reach a first stroke.

9. The protective device for detaching a combined component according to claim 8, characterized in that: The second switch (8) is configured to be squeezed by the connecting member (3) synchronously with the piezoelectric trigger (7), and after the piezoelectric trigger (7) is squeezed to reach a second stroke, the second switch (8) cuts off the control circuit.

10. The protective device for detaching a combined component according to claim 9, characterized in that: The piezoelectric trigger (7) is configured to complete energy storage after the second switch (8) cuts off the control circuit and is squeezed by the connecting member (3) to reach a third stroke; the connecting member (3) is configured to complete the connection between the first component (1) and the second component (2) after the piezoelectric trigger (7) completes energy storage.

11. The protective device for detaching a combined component according to claim 10, characterized in that: The first stroke is one third of the total stroke required for the piezoelectric trigger (7) to complete energy storage, the second stroke is one third of the total stroke required for the piezoelectric trigger (7) to complete energy storage, and the third stroke is one third of the total stroke required for the piezoelectric trigger (7) to complete energy storage.

12. The protective device for detaching a combined component according to claim 7, characterized in that: The first component (1) is provided with a second hole, a portion of the second switch (8) is arranged in the second hole, and another portion of the second switch (8) is located outside the second hole.

13. The protective device for detaching a combined component according to claim 12, characterized in that: The first component (1) is provided with a first hole, a portion of the piezoelectric trigger (7) is provided in the first hole, and another portion of the piezoelectric trigger (7) is located outside the first hole; the portion of the piezoelectric trigger (7) located outside the first hole first contacts the connecting member (3) relative to the portion of the second switch (8) located outside the first hole.

14. The protective device for detaching a combined component according to claim 2, characterized in that: A cover plate (9) is provided on a side of the airbag (4) away from the first component (1), and the cover plate (9) is configured to abut against a panel of the first switch (6) after the airbag (4) is inflated.

15. A compressor, characterized in that: The invention comprises a protective device for disengaging a combined component according to any one of claims 1 to 14, wherein the first component (1) is a gland (1a) of the compressor, and the second component (2) is a rotating shaft (2a) of the compressor.

16. The compressor according to claim 15, characterized in that The protective device for the separation of the combined components also includes: a third component (5), arranged in a direction of the gland (1a) away from the rotating shaft (2a), the third component (5) being an air intake filter (5a) of the compressor; and A first switch (6) is provided on the air intake filter (5a), and the first switch (6) is configured to send out a warning signal when being pushed by the air bag (4) when inflated.

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