Early warning device and power device assembly with same

Abstract

The utility model provides an early warning device and a power device assembly with the same. The early warning device comprises a housing, which is disposed at the detection hole, and is provided with an installation cavity communicated with the detection hole. The pressing structure is movably arranged in the mounting cavity; the compressible part is connected with the pressing structure and is used for applying a pushing force for moving towards one side of the detection hole to the pressing structure; the early warning assembly comprises a warning piece and a switch structure connected with the warning piece, the warning piece is used for sending out an early warning signal, and the switch structure is used for controlling the start-stop state of the warning piece; wherein the pressing structure is provided with a pressing position for pressing the trigger end to close the switch structure, when the liquid pressure value is larger than or equal to a preset value, the pressing structure compresses at least part of the compressible part to move to the pressing position, and the switch structure controls the warning part to be started to send out an early warning signal. According to the utility model, the problem in the prior art that a worker cannot perceive whether the pump or the hydraulic motor is damaged or not is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of early warning devices, in particular to an early warning device and a power device component having the early warning device. Background Art

[0002] At present, the main power units of large-scale construction machinery are usually pumps and hydraulic motors. The hydraulic motor mainly relies on the pressure of high-pressure oil to output driving force to the outside, and the pump is used to transport high-pressure oil to the hydraulic motor. Due to the high pressure of the high-pressure oil itself, the pump or hydraulic motor is prone to oil leakage. The leaked oil will continue to accumulate in the front shell of the pump or hydraulic motor, causing the pressure of the oil in the front shell to increase, and eventually exceed the bearing range of the front shell, causing the front shell to burst and the pump or hydraulic motor to be completely damaged.

[0003] However, during the damage process of the above-mentioned pump or hydraulic motor, the staff cannot detect whether the pump or hydraulic motor is damaged. If the front shell bursts when the staff is driving a large construction machinery to perform related operations, it is very easy to cause a safety accident and seriously affect the staff's operating safety. Utility Model Content

[0004] The main purpose of the utility model is to provide an early warning device and a power device assembly having the same, so as to solve the problem in the prior art that the staff cannot detect whether the pump or the hydraulic motor is damaged.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, an early warning device is provided, which is used to warn the liquid pressure value in a power device. The shell of the power device has a detection hole, and the early warning device includes: a shell, which is arranged at the detection hole, and the shell has a mounting cavity connected to the detection hole; a pressing structure, which can be movably arranged in the mounting cavity to push the pressing structure toward a side away from the detection hole through the liquid in the shell; a compressible member, which is arranged in the mounting cavity, and the compressible member is connected to the pressing structure, so as to apply a thrust to the pressing structure to move toward the side of the detection hole; an early warning component, including a warning member and a switch structure connected to the warning member, the warning member is used to send out an early warning signal, and the early warning signal includes at least one of a light signal or a sound signal, and the switch structure is used to control the start and stop state of the warning member, and the trigger end of the switch structure is located in the mounting cavity and is arranged opposite to at least part of the pressing structure; wherein the pressing structure has a pressing position for pressing the trigger end to close the switch structure, and when the liquid pressure value is greater than or equal to the preset value, the pressing structure compresses at least part of the compressible member to move to the pressing position, and the switch structure controls the warning member to start to send out the early warning signal.

[0006] Furthermore, the compressible part is an elastic structure, and the early warning device also includes: a support part, which is arranged in the installation cavity, the support part has a penetration hole for the pressing structure to penetrate, one end of the elastic structure is connected to the pressing structure, and the other end of the elastic structure is connected to the support part; wherein, the position of the support part is adjustable, and the compression amount of the elastic structure when the pressing structure is in the pressing position is adjusted by adjusting the position of the support part, thereby adjusting the thrust value applied by the elastic structure to the pressing structure when it is in the pressing position.

[0007] Furthermore, the support member includes a cylindrical structure and a support body, the support body is arranged in the inner hole of the cylindrical structure and has a through hole, one end of the elastic structure is connected to the support body, the cylindrical structure is threadedly connected to the shell, and the position of the support member is adjusted by screwing the cylindrical structure.

[0008] Furthermore, a first step surface is provided on the cavity wall of the installation cavity, and the first step surface is located on the side of the cylindrical structure close to the detection hole. The pressing structure includes: a pressing portion, used to press the trigger end; an annular limiting portion, which is provided on the pressing portion and located between the first step surface and the cylindrical structure, and the annular limiting portion is used to limit and stop with the first step surface and / or the cylindrical structure, and the end of the elastic structure away from the supporting body is connected to the annular limiting portion; wherein the outer diameter value of the annular limiting portion is greater than the inner diameter value of the cylindrical structure.

[0009] Furthermore, the shell includes: a shell body, having a through hole connected to the detection hole; a cover body, which is covered on the shell body, and an installation cavity is formed between at least part of the cover body and the shell body, wherein the through hole includes a first sub-hole segment and a second sub-hole segment that are connected to each other, the second sub-hole segment is arranged close to the cover body, and the diameter of the first sub-hole segment is smaller than the diameter of the second sub-hole segment, so that a first step surface is formed at the connection between the two.

[0010] Furthermore, the supporting body is in the shape of a plate, and the plate surface of the supporting body away from the detection hole is a measuring surface. The early warning device also includes: scale lines, which are arranged on the outer peripheral surface of the pressing structure; wherein, when the liquid pressure value is zero, the measuring surface is arranged flush with the zero scale line of the scale line; when the liquid pressure value in the shell is greater than zero, the scale value corresponding to the measuring surface is the liquid pressure value in the shell.

[0011] Furthermore, the pressing portion is columnar and includes a first sub-columnar structure and a second sub-columnar structure which are connected to each other, at least a portion of the first sub-columnar structure is located in the first sub-hole segment, at least a portion of the second sub-columnar structure is located in the second sub-hole segment, and a first mounting groove is provided on the outer peripheral surface of the first sub-columnar structure; wherein the early warning device also includes a first sealing member, which is provided in the first mounting groove to seal at least a portion of the gap between the outer peripheral surface of the first sub-columnar structure and the hole wall of the first sub-hole segment.

[0012] Furthermore, the shell body is cylindrical, and a second step surface and a second mounting groove are provided on the outer circumferential surface of the shell body, the second step surface is used to limit the stop with the outer shell, and the second mounting groove is located on the side of the second step surface close to the outer shell; wherein, the early warning device also includes a second sealing member, and the second sealing member is arranged in the second mounting groove to seal at least part of the gap between the outer circumferential surface of the shell body and the hole wall of the detection hole.

[0013] Furthermore, the cover body includes a plate-like structure and a surrounding plate, the plate-like structure has a mounting hole, the mounting hole is used to install the switch structure, the surrounding plate is arranged on the plate surface of the plate-like structure close to the shell body and is threadedly connected to the shell body; wherein, a third step surface is also arranged on the outer peripheral surface of the shell body, the third step surface is located on the side of the second step surface away from the detection hole, and the third step surface is used to limit the stop with the surrounding plate.

[0014] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a power device assembly is provided, the power device assembly includes a power device and an early warning device, the early warning device is arranged on the housing of the power device, and the early warning device is the early warning device mentioned above.

[0015] The technical solution of the utility model is applied, and the early warning device is used to warn the liquid pressure value in the power device. The shell of the power device has a detection hole, and the shell of the early warning device is arranged at the detection hole. The shell has a mounting cavity connected to the detection hole. The pressing structure can be movably arranged in the mounting cavity to push the pressing structure toward the side away from the detection hole through the liquid in the shell. The compressible member is arranged in the mounting cavity and connected to the pressing structure to apply a thrust to the pressing structure to move toward the side of the detection hole. The early warning component includes a warning member and a switch structure connected to the warning member. The warning member is used to send out an early warning signal, and the early warning signal includes at least one of a light signal or a sound signal. The switch structure is used to control the start and stop state of the warning member. The trigger end of the switch structure is located in the mounting cavity and is arranged relative to at least part of the pressing structure. Among them, the pressing structure has a pressing position for pressing the trigger end to close the switch structure. When the liquid pressure value is greater than or equal to the preset value, the pressing structure compresses at least part of the compressible member to move to the pressing position, and the switch structure controls the warning member to start to send out the early warning signal. In this way, when the power device is damaged and the oil pressure in the housing continues to increase, the oil will push the pressing structure to compress the compressible part and move away from the detection hole until the oil pressure value in the housing reaches the preset value. The pressing structure will move to the pressing position and press the switch structure. The switch structure controls the early warning part to start and issue an early warning message, thereby reminding the staff that the power device is damaged, thereby solving the problem in the prior art that the staff cannot detect whether the pump or hydraulic motor is damaged. At the same time, the staff can also repair the power device in advance according to the early warning signal, which not only extends the service life of the power device, but also improves the work safety of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 A cross-sectional schematic diagram of an embodiment of the early warning device according to the utility model is shown.

[0018] The above drawings include the following reference numerals:

[0019] 10. Shell; 11. First step surface; 12. Shell body; 121. Through hole; 1211. First sub-hole section; 1212. Second sub-hole section; 122. Second step surface; 123. Third step surface; 124. Second mounting groove; 13. Cover body; 131. Plate-like structure; 132. Enclosure; 20. Pressing structure; 21. Pressing part; 211. First sub-columnar structure; 2111. First mounting groove; 212. Second sub-columnar structure; 22. Annular limiting part; 30. Compressible part; 40. Early warning component; 41. Switch structure; 412. Trigger end; 50. Support member; 51. Through hole; 52. Cylindrical structure; 53. Support body; 531. Measuring surface; 60. Scale line; 70. First sealing member; 80. Second sealing member; 90. Locking structure; 100. Protective member. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0021] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0022] In the present invention, unless otherwise specified, directional words such as "up" and "down" are usually used in reference to the directions shown in the drawings, or in reference to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are usually used in reference to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0023] In order to solve the problem in the prior art that workers are unable to detect whether a pump or a hydraulic motor is damaged, the present application provides an early warning device and a power device assembly having the same.

[0024] like Figure 1 As shown, the early warning device is used to warn the liquid pressure value in the power device. The shell of the power device has a detection hole. The early warning device includes a shell 10, a pressing structure 20, a compressible member 30 and an early warning assembly 40. The shell 10 is arranged at the detection hole, and the shell 10 has a mounting cavity connected to the detection hole. The pressing structure 20 can be movably arranged in the mounting cavity to push the pressing structure 20 toward a side away from the detection hole through the liquid in the shell. The compressible member 30 is arranged in the mounting cavity, and the compressible member 30 is connected to the pressing structure 20 to apply a thrust to the pressing structure 20 to move toward one side of the detection hole. The early warning assembly 40 includes a warning member and a switch structure 41 connected to the warning member. The warning member is used to send a warning signal, and the warning signal includes at least one of a light signal or a sound signal. The switch structure 41 is used to control the start and stop state of the warning member. The trigger end 412 of the switch structure 41 is located in the mounting cavity and is arranged relative to at least part of the pressing structure 20. Among them, the pressing structure 20 has a pressing position for pressing the trigger end 412 to close the switch structure 41. When the liquid pressure value is greater than or equal to the preset value, the pressing structure 20 compresses at least part of the compressible part 30 to move to the pressing position, and the switch structure 41 controls the alarm part to start to issue a warning signal.

[0025] By applying the technical solution of this embodiment, the early warning device is used to give an early warning of the liquid pressure value in the power device. The outer shell of the power device has a detection hole. The shell 10 of the early warning device is arranged at the detection hole. The shell 10 has an installation cavity connected to the detection hole. The pressing structure 20 can be movably arranged in the installation cavity to push the pressing structure toward a side away from the detection hole through the liquid in the shell. The compressible part 30 is arranged in the installation cavity and connected to the pressing structure to apply a thrust to the pressing structure to move toward the detection hole. The early warning component 40 includes a warning member and a switch structure 41 connected to the warning member. The warning member is used to issue a warning signal, and the warning signal includes at least one of a light signal or a sound signal. The switch structure 41 is used to control the start and stop state of the warning member. The trigger end 412 of the switch structure 41 is located in the installation cavity and is arranged relative to at least part of the pressing structure 20. Among them, the pressing structure 20 has a pressing position for pressing the trigger end 412 to close the switch structure 41. When the liquid pressure value is greater than or equal to the preset value, the pressing structure 20 compresses at least part of the compressible part 30 to move to the pressing position, and the switch structure 41 controls the warning part to start to issue a warning signal. In this way, when the power device is damaged and the oil pressure in the shell continues to increase, the oil will push the pressing structure 20 to compress the compressible part 30 and move away from the detection hole until the oil pressure value in the shell reaches the preset value. The pressing structure 20 will move to the pressing position and press the switch structure 41. The switch structure 41 controls the warning part to start to issue a warning message, thereby reminding the staff that the power device has been damaged, thereby solving the problem that the staff cannot detect whether the pump or hydraulic motor is damaged in the prior art. At the same time, the staff can also repair the power device in advance according to the warning signal, which not only extends the service life of the power device, but also improves the work safety of the staff.

[0026] Optionally, the power device may be a travel motor or a pump.

[0027] Optionally, the warning component may be an LED light. When the switch structure 41 controls the warning component to start, the warning component is always on, or always off, or flashes to remind the staff that the power device has been damaged.

[0028] Optionally, the warning component may be a buzzer. When the switch structure 41 controls the warning component to start, the warning component emits a buzzer to remind the staff that the power device has been damaged.

[0029] It should be noted that the structure of the warning element is not limited thereto, and other structures with warning functions can be set as warning elements. Optionally, the warning element is a display screen on the engineering machinery, and when the switch structure 41 is closed, the display screen displays relevant information that the power device has been damaged.

[0030] like Figure 1As shown, the compressible member 30 is an elastic structure, and the early warning device further includes a support member 50, which is arranged in the installation cavity, and the support member 50 has a penetration hole 51 for the pressing structure 20 to penetrate, one end of the elastic structure is connected to the pressing structure 20, and the other end of the elastic structure is connected to the support member 50. Among them, the position of the support member 50 is adjustable, and the compression amount of the elastic structure when the pressing structure 20 is in the pressing position is adjusted by adjusting the position of the support member 50, thereby adjusting the thrust value applied by the elastic structure to the pressing structure 20 in the pressing position. In this way, the above setting, on the one hand, allows the staff to adjust the compression amount of the elastic structure when the pressing structure 20 is in the pressing position by adjusting the setting position of the support member 50, and then adjust the early warning pressure value when the pressing structure 20 presses the switch structure 41 for early warning, thereby enabling the early warning device to warn power devices of different specifications and sizes, thereby improving the versatility of the early warning device; on the other hand, it makes the structure of the compressible member 30 simpler, easier to process and realize, thereby reducing the processing cost of the compressible member 30 and the processing difficulty of the staff.

[0031] Optionally, the elastic structure is a spring.

[0032] like Figure 1 As shown, the support member 50 includes a cylindrical structure 52 and a support body 53. The support body 53 is arranged in the inner hole of the cylindrical structure 52 and has a through hole 51. One end of the elastic structure is connected to the support body 53. The cylindrical structure 52 is threadedly connected to the housing 10. The position of the support member 50 can be adjusted by screwing the cylindrical structure 52. In this way, the above arrangement, on the one hand, can be threadedly connected between the support member 50 and the housing 10, so that the staff can adjust the setting position of the support member 50 by screwing the cylindrical structure 52, thereby reducing the adjustment difficulty of the staff; on the other hand, the through hole 51 can be located in the inner hole of the cylindrical structure 52, so as to ensure that the setting position of the through hole 51 can match the movement direction of the pressing structure 20, thereby making the structure of the support member 50 more compact and reasonable.

[0033] like Figure 1As shown, a first step surface 11 is provided on the cavity wall of the installation cavity, and the first step surface 11 is located on the side of the cylindrical structure 52 close to the detection hole. The pressing structure 20 includes a pressing portion 21 and an annular limiting portion 22, and the pressing portion 21 is used to press the trigger end 412. The annular limiting portion 22 is provided on the pressing portion 21 and is located between the first step surface 11 and the cylindrical structure 52. The annular limiting portion 22 is used to limit and stop with the first step surface 11 and / or the cylindrical structure 52, and the end of the elastic structure away from the support body 53 is connected to the annular limiting portion 22. Among them, the outer diameter value of the annular limiting portion 22 is greater than the inner diameter value of the cylindrical structure 52. In this way, by limiting and stopping the annular limiting portion 22 and the first step surface 11 or the cylindrical structure 52, on the one hand, it can prevent the pressing structure 20 from popping out of the installation cavity under the thrust of the compressible part 30, thereby improving the operating stability of the early warning device; on the other hand, it can prevent the oil pressure in the outer shell from being too large, which will cause the pressing structure 20 to crush the switch structure 41, thereby extending the service life of the early warning device.

[0034] like Figure 1 As shown, the housing 10 includes a housing body 12 and a cover body 13, and the housing body 12 has a through hole 121 connected to the detection hole. The cover body 13 is covered on the housing body 12, and at least a part of the cover body 13 and the housing body 12 surround a mounting cavity. Among them, the through hole 121 includes a first sub-hole section 1211 and a second sub-hole section 1212 that are connected to each other, and the second sub-hole section 1212 is arranged close to the cover body 13, and the diameter of the first sub-hole section 1211 is smaller than the diameter of the second sub-hole section 1212, so that the connection between the two forms a first step surface 11. In this way, the above-mentioned arrangement allows the staff to inspect and maintain the parts in the housing body 12 by disassembling the cover body 13, thereby reducing the difficulty of inspection and maintenance for the staff; on the other hand, it makes the formation of the first step surface 11 simpler and easier, and the processing is realized, thereby reducing the processing difficulty of the staff and the processing cost of the housing 10.

[0035] In this embodiment, a threaded section is provided on the hole wall of the second sub-hole section 1212 , and the cylindrical structure 52 is threadedly connected to the shell body 12 .

[0036] In this embodiment, the early warning device also includes a locking structure 90, which is threadedly connected to the cylindrical structure 52 and abuts against the shell body 12. The locking structure 90 is used to lock the cylindrical structure 52. By setting the locking structure 90, it is possible to prevent the cylindrical structure 52 from loosening or shifting, which would cause the compression amount of the compressible part 30 to change when the pressing structure 20 is in the pressing position, thereby improving the early warning reliability of the early warning device.

[0037] Specifically, the locking structure 90 is a locking nut.

[0038] like Figure 1As shown, the support body 53 is in the shape of a plate, and the plate surface of the support body 53 away from the detection hole is the measuring surface 531. The early warning device also includes a scale line 60, and the scale line 60 is arranged on the outer peripheral surface of the pressing structure 20. Among them, when the liquid pressure value is zero, the measuring surface 531 is arranged flush with the zero scale line of the scale line 60; when the liquid pressure value in the shell is greater than zero, the scale value corresponding to the measuring surface 531 is the liquid pressure value in the shell. In this way, when the early warning device does not issue an early warning, the staff can also disassemble the cover body 13 to understand the internal pressure of the power device in advance by reading the liquid pressure value corresponding to the measuring surface 531, so that the staff can repair and maintain the power device in advance, further extending the service life of the power device.

[0039] like Figure 1 As shown, the pressing portion 21 is columnar and includes a first sub-columnar structure 211 and a second sub-columnar structure 212 connected to each other, at least part of the first sub-columnar structure 211 is located in the first sub-hole segment 1211, at least part of the second sub-columnar structure 212 is located in the second sub-hole segment 1212, and a first mounting groove 2111 is provided on the outer circumference of the first sub-columnar structure 211. Among them, the early warning device also includes a first sealing member 70, which is arranged in the first mounting groove 2111 to seal at least part of the gap between the outer circumference of the first sub-columnar structure 211 and the hole wall of the first sub-hole segment 1211. In this way, the size of each part of the pressing portion 21 (the first sub-columnar structure 211 and the second sub-columnar structure 212) can match the size of the first sub-hole segment 1211 and the through hole 51, so as to avoid interference between the pressing structure 20 and other structures and affect the running smoothness of the pressing structure 20, thereby improving the early warning reliability of the early warning device. At the same time, by providing the first sealing member 70 to prevent oil from flowing into the installation cavity, not only can the service life of the warning device be extended, but also the pressure warning accuracy of the warning device can be improved.

[0040] Optionally, the first sealing member 70 is a sealing ring.

[0041] like Figure 1As shown, the shell body 12 is cylindrical, and the outer circumferential surface of the shell body 12 is provided with a second step surface 122 and a second mounting groove 124, the second step surface 122 is used to limit the stop with the shell, and the second mounting groove 124 is located on the side of the second step surface 122 close to the shell. Among them, the early warning device also includes a second seal 80, and the second seal 80 is arranged in the second mounting groove 124, so as to seal at least part of the gap between the outer circumferential surface of the shell body 12 and the hole wall of the detection hole. In this way, by setting the second step surface 122, it is convenient for the staff to install the early warning device, that is, when the staff pushes the shell body 12 into the second step surface 122 and the shell limit stop, the early warning device is installed in place, thereby reducing the installation difficulty of the staff. At the same time, the second seal 80 can prevent the high-pressure oil in the shell from flowing out to the outside, resulting in a decrease in the oil pressure in the shell, thereby causing the early warning device to fail to accurately warn to remind the staff that the power device has been damaged, thereby improving the early warning accuracy of the early warning device.

[0042] Optionally, the second sealing member 80 is a sealing ring.

[0043] like Figure 1 As shown, the cover body 13 includes a plate-like structure 131 and a panel 132. The plate-like structure 131 has a mounting hole, and the mounting hole is used to install the switch structure 41. The panel 132 is arranged on the plate surface of the plate-like structure 131 close to the shell body 12 and is threadedly connected to the shell body 12. Among them, a third step surface 123 is also arranged on the outer peripheral surface of the shell body 12. The third step surface 123 is located on the side of the second step surface 122 away from the detection hole, and the third step surface 123 is used to limit the stop with the panel 132. In this way, the switch structure 41 arranged in the mounting hole can be disassembled together with the cover body 13, so that the staff can inspect and maintain the switch structure 41, thereby reducing the difficulty of inspecting the switch structure 41. At the same time, the above-mentioned setting allows the staff to disassemble and assemble the cover body 13 by screwing the cover body 13, thereby reducing the difficulty of disassembly and assembly for the staff; on the other hand, when the cover body 13 is screwed to the limit stop of the third step surface 123, the staff can judge that the cover body 13 is installed in place, further reducing the difficulty of disassembly and assembly for the staff.

[0044] In this embodiment, the early warning device further includes a protective member 100, which is sleeved on the housing body 12 and located between the third step surface 123 and the enclosure 132. The enclosure 132 is provided with a notch on the end surface facing the third step surface 123 for accommodating the protective member 100. In this way, when the cover 13 is installed in place, the protective member 100 can be elastically deformed to stop and buffer the cover 13, thereby preventing the staff from screwing the cover 13 too much and causing damage to the cover 13, thereby extending the service life of the cover 13.

[0045] Optionally, the protective member 100 is an O-shaped protective ring.

[0046] The present application also provides a power device assembly (not shown), which includes a power device and an early warning device. The early warning device is arranged on the outer shell of the power device, and the early warning device is the early warning device mentioned above.

[0047] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0048] The early warning device is used to warn the liquid pressure value in the power device. The shell of the power device has a detection hole. The shell of the early warning device is arranged at the detection hole. The shell has a mounting cavity connected to the detection hole. The pressing structure can be movably arranged in the mounting cavity to push the pressing structure toward the side away from the detection hole through the liquid in the shell. The compressible member is arranged in the mounting cavity and connected to the pressing structure to apply a thrust to the pressing structure to move toward the side of the detection hole. The early warning component includes a warning member and a switch structure connected to the warning member. The warning member is used to send out an early warning signal. The early warning signal includes at least one of a light signal or a sound signal. The switch structure is used to control the start and stop state of the warning member. The trigger end of the switch structure is located in the mounting cavity and is arranged relative to at least part of the pressing structure. Among them, the pressing structure has a pressing position for pressing the trigger end to close the switch structure. When the liquid pressure value is greater than or equal to the preset value, the pressing structure compresses at least part of the compressible member to move to the pressing position, and the switch structure controls the warning member to start to send out the early warning signal. In this way, when the power device is damaged and the oil pressure in the housing continues to increase, the oil will push the pressing structure to compress the compressible part and move away from the detection hole until the oil pressure value in the housing reaches the preset value. The pressing structure will move to the pressing position and press the switch structure. The switch structure controls the early warning part to start and issue an early warning message, thereby reminding the staff that the power device is damaged, thereby solving the problem in the prior art that the staff cannot detect whether the pump or hydraulic motor is damaged. At the same time, the staff can also repair the power device in advance according to the early warning signal, which not only extends the service life of the power device, but also improves the work safety of the staff.

[0049] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0050] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0051] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0052] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An early warning device for early warning of the liquid pressure value in a power device, wherein the housing of the power device has a detection hole, characterized in that: The early warning device comprises: A housing (10) is arranged at the detection hole, and the housing (10) has a mounting cavity communicated with the detection hole; A pressing structure (20) is movably arranged in the installation cavity so as to push the pressing structure (20) toward a side away from the detection hole through the liquid in the housing; A compressible member (30) is arranged in the installation cavity, and the compressible member (30) is connected to the pressing structure (20) so as to apply a thrust to the pressing structure (20) to move toward one side of the detection hole; An early warning component (40) comprises an early warning member and a switch structure (41) connected to the early warning member, the early warning member is used to send an early warning signal, the early warning signal comprises at least one of an optical signal or an acoustic signal, the switch structure (41) is used to control the start and stop state of the early warning member, and a trigger end (412) of the switch structure (41) is located in the installation cavity and is arranged opposite to at least a portion of the pressing structure (20); The pressing structure (20) has a pressing position for pressing the trigger end (412) to close the switch structure (41); when the liquid pressure value is greater than or equal to a preset value, the pressing structure (20) compresses at least a portion of the compressible part (30) to move to the pressing position, and the switch structure (41) controls the alarm part to start up to issue the warning signal.

2. The early warning device according to claim 1, characterized in that: The compressible member (30) is an elastic structure, and the early warning device further comprises: A support member (50) is arranged in the installation cavity, the support member (50) having a penetration hole (51) for the pressing structure (20) to penetrate, one end of the elastic structure is connected to the pressing structure (20), and the other end of the elastic structure is connected to the support member (50); The position of the support member (50) is adjustable, and by adjusting the position of the support member (50), the compression amount of the elastic structure when the pressing structure (20) is in the pressing position can be adjusted, thereby adjusting the thrust value applied by the elastic structure to the pressing structure (20) when the pressing structure (20) is in the pressing position.

3. The early warning device according to claim 2, characterized in that: The support member (50) comprises a cylindrical structure (52) and a support body (53); the support body (53) is arranged in the inner hole of the cylindrical structure (52) and has the through hole (51); one end of the elastic structure is connected to the support body (53); the cylindrical structure (52) is threadedly connected to the shell (10); and the position of the support member (50) is adjusted by screwing the cylindrical structure (52).

4. The early warning device according to claim 3, characterized in that: A first step surface (11) is provided on the cavity wall of the installation cavity, and the first step surface (11) is located on a side of the cylindrical structure (52) close to the detection hole. The pressing structure (20) comprises: A pressing portion (21), used for pressing the trigger end (412); an annular limiting portion (22), the annular limiting portion (22) being arranged on the pressing portion (21) and located between the first step surface (11) and the cylindrical structure (52), the annular limiting portion (22) being used for limiting and stopping with the first step surface (11) and / or the cylindrical structure (52), and one end of the elastic structure away from the supporting body (53) being connected to the annular limiting portion (22); Wherein, the outer diameter of the annular limiting portion (22) is greater than the inner diameter of the cylindrical structure (52).

5. The early warning device according to claim 4, characterized in that: The housing (10) comprises: The housing body (12) has a through hole (121) communicating with the detection hole; A cover body (13) is arranged on the shell body (12), and at least a part of the cover body (13) and the shell body (12) surround and form the installation cavity. The through hole (121) comprises a first sub-hole segment (1211) and a second sub-hole segment (1212) which are interconnected, the second sub-hole segment (1212) is arranged close to the cover body (13), and the diameter of the first sub-hole segment (1211) is smaller than the diameter of the second sub-hole segment (1212), so that the first step surface (11) is formed at the connection between the two.

6. The early warning device according to claim 5, characterized in that: The support body (53) is in the shape of a plate, and the plate surface of the support body (53) away from the detection hole is a measuring surface (531). The early warning device further comprises: A scale line (60) is arranged on the outer peripheral surface of the pressing structure (20); Wherein, when the liquid pressure value is zero, the measuring surface (531) is arranged flush with the zero scale line of the scale line (60); when the liquid pressure value in the shell is greater than zero, the scale value corresponding to the measuring surface (531) is the liquid pressure value in the shell.

7. The early warning device according to claim 5, characterized in that: The pressing portion (21) is columnar and comprises a first sub-columnar structure (211) and a second sub-columnar structure (212) which are connected to each other, at least a portion of the first sub-columnar structure (211) is located in the first sub-hole segment (1211), at least a portion of the second sub-columnar structure (212) is located in the second sub-hole segment (1212), and a first mounting groove (2111) is provided on the outer peripheral surface of the first sub-columnar structure (211); The early warning device further comprises a first seal (70), wherein the first seal (70) is arranged in the first mounting groove (2111) to seal at least part of the gap between the outer peripheral surface of the first sub-columnar structure (211) and the hole wall of the first sub-hole section (1211).

8. The early warning device according to claim 5, characterized in that: The shell body (12) is cylindrical, and a second step surface (122) and a second mounting groove (124) are provided on the outer peripheral surface of the shell body (12), the second step surface (122) is used for limiting and stopping with the shell, and the second mounting groove (124) is located on a side of the second step surface (122) close to the shell; The early warning device further comprises a second seal (80), wherein the second seal (80) is arranged in the second mounting groove (124) to seal at least part of the gap between the outer peripheral surface of the shell body (12) and the hole wall of the detection hole.

9. The early warning device according to claim 8, characterized in that: The cover body (13) comprises a plate-like structure (131) and a surrounding plate (132), the plate-like structure (131) having a mounting hole, the mounting hole being used to mount the switch structure (41), the surrounding plate (132) being arranged on a plate surface of the plate-like structure (131) close to the housing body (12) and being threadedly connected to the housing body (12); A third step surface (123) is also provided on the outer peripheral surface of the shell body (12), and the third step surface (123) is located on the side of the second step surface (122) away from the detection hole, and the third step surface (123) is used to limit and stop with the enclosure (132).

10. A power plant assembly, characterized in that: The power device assembly includes a power device and an early warning device. The early warning device is arranged on the housing of the power device. The early warning device is the early warning device described in any one of claims 1 to 9.

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