A hydraulic jacker

Abstract

A hydraulic jacking device comprises a handle assembly, a rotating oil passing mechanism and a jacking assembly; wherein the jacking assembly comprises an oil cylinder, the handle assembly is pivotally connected with the oil cylinder through the rotating oil passing mechanism, and the handle assembly, the rotating oil passing mechanism and an internal oil passage of the oil cylinder are communicated. The application realizes the active communication of the oil passage of the handle assembly and the oil passage in the oil cylinder by arranging the communicated oil passage in the rotating oil passing mechanism, and the handle assembly can freely adjust the oil passing angle, so that the oil passing pump can be connected with the oil passing head from various angles and provide the hydraulic driving force to the jacking assembly, and the device is suitable for various complex rescue environments. Meanwhile, the unified arrangement of the handle and the oil passing head cancels the transition joint part, so that the product use is more stable, and the oil leakage risk is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of rescue tools, and particularly relates to a hydraulic jacking device. BACKGROUND

[0002] The hydraulic jacking device is a hydraulic breaking tool, which is mainly used for rescuing victims trapped in limited environments. The main components of the hydraulic jacking device are an oil cylinder and a piston push rod. The hydraulic jacking device is usually powered by a motor pump or an electric pump. The piston push rod is pushed out of the oil cylinder by hydraulic pressure to achieve the jacking function.

[0003] In a car accident rescue, the hydraulic jacking device can support, stabilize or lift a vehicle locally according to the needs, and open a channel for rescue. In disaster rescue such as fire and earthquake, the device can be used to support dangerous objects and lift heavy objects to expand the space. The device is an essential rescue tool for fire departments, traffic police and other disaster rescue departments.

[0004] The traditional hydraulic jacking device has a handle and an oil pump connection joint, which are arranged at a fixed angle. When the space is narrow and the operation space is complex, the oil pump connection joint cannot be connected to the oil pump at a fixed angle, which affects the rescue process. Therefore, there is an urgent need for a hydraulic jacking device that can flexibly adjust the angle of the oil pump connection joint. SUMMARY

[0005] The application provides a hydraulic jacking device to solve the technical problem that the angle of the oil passing assembly of the traditional jacking device is single and cannot be changed, and the device cannot adapt to complex rescue environments.

[0006] To solve the above technical problems, one technical solution adopted by the application is as follows:

[0007] A hydraulic jacking device, comprising a handle assembly, a rotating oil passing mechanism and a jacking assembly.

[0008] The jacking assembly comprises an oil cylinder. The handle assembly and the oil cylinder are pivotally connected through the rotating oil passing mechanism. The handle assembly, the rotating oil passing mechanism and the internal oil circuit of the oil cylinder are in communication.

[0009] Further, the rotating oil passing mechanism comprises a first connecting piece fixedly connected with the handle assembly, a rotating central shaft and a second connecting piece fixedly connected with the oil cylinder.

[0010] The rotating central shaft is pivotally connected with the first connecting piece and the second connecting piece. The internal oil circuits of the first connecting piece, the rotating central shaft and the second connecting piece are in communication.

[0011] Further, the first connecting member comprises a first base and two first extension parts extending non-parallel from the first base, the first base is fixedly connected with the handle assembly, and the two first extension parts are oppositely and spacedly arranged; wherein, each of the first extension parts is provided with a first through hole in the axial direction of the rotating shaft, and the rotating shaft passes through the first through hole and is pivotally connected with the first extension part.

[0012] Further, the second connecting member comprises a second base and a second extension part extending non-parallel from the second base, the second base is fixedly connected with the oil cylinder, the second extension part is arranged between the two first extension parts, and the second extension part is provided with a second through hole in the axial direction of the rotating shaft, the rotating shaft passes through the second through hole, and the second extension part can rotate around the rotating shaft.

[0013] Further, the first base is internally provided with at least one first oil passage, and the first oil passage is in communication with one of the first through holes;

[0014] The second base is internally provided with at least one second oil passage, and the second oil passage is in communication with the second through hole;

[0015] The rotating shaft is internally provided with at least one third oil passage, and the two ends of the third oil passage are respectively in communication with the first through hole and the second through hole, so that the first oil passage, the second oil passage and the third oil passage are in communication.

[0016] Further, the handle assembly comprises an oil passing head, a reversing handle and a reversing valve, the oil passing head is in communication with the reversing valve through the reversing handle; wherein, the reversing valve is provided at the bottom with a first oil hole in communication with the first oil passage.

[0017] Further, the rotating shaft is centrally provided at both sides with an adjusting hole, the rotating shaft is externally provided at both sides with an outer oil groove, and the outer oil groove is internally provided with a second oil hole;

[0018] The rotating shaft is internally provided at both sides with an inner oil groove, and the inner oil groove is internally provided with a third oil hole; wherein, the second oil hole and the third oil hole located at the same side are in communication through the third oil passage.

[0019] Further, the first oil passage corresponds in position to the outer oil groove, and the second oil passage corresponds in position to the inner oil groove.

[0020] Further, the oil cylinder further comprises a cylinder head, a cylinder body, a cylinder bottom, an oil passing pipe and a holding handle, the cylinder head and the cylinder bottom are fixedly connected with the holding handle and are connected through the cylinder body, and the cylinder body is provided at the upper side with the oil passing pipe;

[0021] The cylinder head sidewall is provided with a second oil hole that communicates with the second oil passage, and one of the fourth oil holes is connected to the oil passage at the bottom of the cylinder through the oil pipe.

[0022] Furthermore, the support assembly also includes a support head, a primary piston, a secondary piston, and a central oil pipe. The primary piston is movably fitted in the cylinder block and the cylinder head, the secondary piston is movably fitted in the primary piston, the central oil pipe is disposed inside the secondary piston, and the support head is fixedly connected to the outer end of the secondary piston and the rear end of the cylinder bottom.

[0023] The beneficial effects of this application are as follows: By setting up an interconnected oil circuit inside the rotary oil-passing mechanism, the oil circuit of the handle assembly and the oil circuit in the oil cylinder are dynamically connected. At the same time, the angle between the oil inlet end of the handle assembly and the oil pump pipe can be freely adjusted through the rotary oil-passing mechanism, which makes it easy for the oil pump to connect to the oil-passing head from various angles and provide hydraulic driving force to the support assembly, adapting to various complex rescue environments. This application also directly connects the handle assembly, the rotary oil-passing mechanism and the oil pump pipe into a unified rotary oil-passing assembly, eliminating the transition joint parts, making the product more stable in use and reducing the risk of oil leakage. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0025] Figure 1 This is a schematic diagram of one embodiment of the hydraulic jacking device of this application;

[0026] Figure 2 yes Figure 1 A schematic diagram of one embodiment of the rotating oil-passing mechanism;

[0027] Figure 3 yes Figure 2 A cross-sectional structural schematic diagram of one embodiment of the first connecting member;

[0028] Figure 4 yes Figure 2 A schematic diagram of one embodiment of the rotating central axis;

[0029] Figure 5 yes Figure 4 A cross-sectional structural schematic diagram of one embodiment of the rotating central axis;

[0030] Figure 6 yes Figure 2 A cross-sectional structural schematic diagram of one embodiment of the second connector;

[0031] Figure 7 is Figure 1 structure diagram of an embodiment of the handle assembly;

[0032] Figure 8 is Figure 1 structure diagram of an embodiment of the oil cylinder. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0034] As Figure 1 shown, Figure 1 The hydraulic jacking device comprises a handle assembly 1, a rotating oil passing mechanism 2 and a jacking assembly 4; wherein the jacking assembly 4 comprises an oil cylinder 3, the handle assembly 1 is pivotally connected with the oil cylinder 3 through the rotating oil passing mechanism 2, and the handle assembly 1, the rotating oil passing mechanism 2 and the internal oil passage of the oil cylinder 3 are communicated.

[0035] The present application sets the communicated oil passage in the rotating oil passing mechanism 2, and the oil passage of the handle assembly 1 and the oil passage in the oil cylinder 3 are communicated, and the handle assembly 1 is freely adjusted in the rotating oil passing mechanism 2, so that the oil passing pump can be connected with the oil passing head 11 from various angles and provide the hydraulic driving force for the jacking assembly 4, and various complex rescue environments are adapted. The handle assembly 1 and the rotating oil passing mechanism 2 are directly connected and uniformly arranged, the transition joint part is cancelled, the product is more stable, and the oil leakage risk is reduced.

[0036] As Figures 2-3 shown, Figure 2 The structure diagram of the rotating oil passing mechanism of the present application, Figure 3Figure 2 is a sectional view of the first connecting member of the rotating oiling mechanism of the present application; the rotating oiling mechanism 2 comprises a first connecting member 21, a rotating central shaft 22 and a second connecting member 23. The rotating oiling mechanism 2 comprises the first connecting member 21 fixedly connected with the handle assembly 1, the rotating central shaft 22 and the second connecting member 23 fixedly connected with the oil cylinder 3; wherein the rotating central shaft 22 is pivotally connected with the first connecting member 21 and the second connecting member 23; and the internal oil passages of the first connecting member 21, the rotating central shaft 22 and the second connecting member 23 are in communication. The beneficial effect is that the first connecting member 21 and the second connecting member 23 can both rotate around the rotating central shaft 22, preventing the first connecting member 21 or the second connecting member 23 from being stuck and unable to adjust the angle of the rotating oiling mechanism 2. Of course, in other embodiments, the structure of the rotating oiling mechanism 2 can also be other, for example, the first connecting member 21 is fixedly connected with the rotating central shaft 22, and the second connecting member 23 is pivotally connected with the rotating central shaft 22, only the second connecting member 23 needs to be directly rotated, thereby reducing the risk of oil leakage.

[0037] Optionally, the first connecting member 21 comprises a first base 212 and two first extension parts 211 extending non-parallel from the first base 212, the first base 212 is fixedly connected with the handle assembly 1, and the two first extension parts 211 are oppositely and spacedly arranged; wherein in the axial direction of the rotating central shaft 22, each first extension part 211 is provided with a first through hole 213, the rotating central shaft 22 passes through the first through hole 213 and is pivotally connected with the first extension part 211; this arrangement can make the first base 212 be fixedly connected with the handle assembly 1, while the first connecting member 21 is sleeved on the rotating central shaft 22 and freely rotates.

[0038] The second connecting member 23 comprises a second base 232 and a second extension part 231 extending non-parallel from the second base, the second base 232 is fixedly connected with the oil cylinder 3, the second extension part 231 is arranged between the two first extension parts 211, and in the axial direction of the rotating central shaft 22, the second extension part 231 is provided with a second through hole 233, the rotating central shaft 22 passes through the second through hole 233, and the second extension part 231 can rotate around the rotating central shaft 22; wherein the second connecting member 23 is sleeved in the middle part of the rotating central shaft 22 and can freely rotate through the second through hole 233, while the rotating oiling mechanism 2 is fixedly connected at the side end of the oil cylinder 3 through the second base 232.

[0039] In this embodiment, the first connecting member 21 and the second connecting member 23 are simultaneously and movably sleeved on the rotating central shaft 22, which can make the first connecting member 21 freely rotate relative to the second connecting member 23, thereby realizing the free rotation of the handle assembly 1 at the side end of the oil cylinder 3.

[0040] In other embodiments, the first connecting member 21 or the second connecting member 23 can be directly fixed with the rotating central shaft 22, so that only the second connecting member 23 or the first connecting member 21 is sleeved on the rotating central shaft 22 for rotation.

[0041] The first base 212 is internally provided with at least one first oil passage 214, which is communicated with one of the first through holes 213, and the first base 212 can be provided with multiple first oil passages 214 according to actual oil quantity demand, so as to increase the flow of hydraulic oil; the second base 232 is internally provided with at least one second oil passage 234, which is communicated with the second through hole 233, and the second base 232 can also be provided with multiple second oil passages 234 according to actual oil quantity demand, so as to increase the flow of hydraulic oil; the rotating central shaft 22 is internally provided with at least one third oil passage 225, which is respectively communicated with the first through hole 213 and the second through hole 233 at two ends, so that the first oil passage 214, the second oil passage 234 and the third oil passage 225 are communicated.

[0042] The arrangement makes the first extension 211 communicate with the first oil hole 131 of the handle assembly 1, so that the hydraulic oil of the handle assembly 1 flows into the first oil passage 214, the third oil passage 225 and the second oil passage 234 of the same side end in sequence, and then enters the oil cylinder 3, and then the hydraulic oil flows into the second oil passage 234, the third oil passage 225 and the first oil passage 214 of the other side end in sequence from the fourth oil hole 311 of the oil cylinder 3, so as to realize the circulating flow of the hydraulic oil, thereby controlling the extension and contraction of the roof supporting assembly 4.

[0043] As shown in Figures 4-6 , Figure 4 and Figure 5 are respectively the front view and the sectional view of the rotating central shaft of the application, Figure 6 is a sectional structure schematic view of the second connecting piece of the application; the rotating central shaft 22 is provided with an adjusting hole 226 at the center of two sides; the rotating central shaft 22 is provided with an outer oil groove 221 at the outer end of two sides, and the outer oil groove 221 is internally provided with a second oil hole 222; the rotating central shaft 22 is provided with an inner oil groove 223 at the inner end of two sides, and the inner oil groove 223 is internally provided with a third oil hole 224; wherein the second oil hole 222 and the third oil hole 224 located at the same side end are communicated through the third oil passage 225; the design can communicate the outer oil groove 221 and the inner oil groove 223, so as to facilitate the flow of hydraulic oil.

[0044] The first oil passage 214 corresponds in position to the outer oil groove 221, and the second oil passage 234 corresponds in position to the inner oil groove 223; wherein the outer oil groove 221 is sealingly and pivotally connected with the first through hole 213, so as to ensure that the hydraulic oil does not leak from the first through hole 213 during rotation. The inner oil groove 223 is sealingly and pivotally connected with the second through hole 233, so as to ensure that the hydraulic oil does not leak from the second through hole 233 during rotation.

[0045] In this embodiment, the outer oil groove 221 of the rotating central shaft 22 is connected to the corresponding first oil passage 214, allowing the hydraulic oil in the first oil passage 214 to enter the outer oil groove 221 from any angle. The hydraulic oil then enters the inner third oil passage 225 through the second oil hole 222, and subsequently enters the inner oil groove 223. Simultaneously, because the second oil passage 234 corresponds to the inner oil groove 223, the hydraulic oil in the inner oil groove 223 can flow into the second oil passage 234 from any angle, and then into the oil cylinder 3. This allows the rotating oil-passing mechanism 2 to rotate freely while the hydraulic oil flows through the first connecting member 21, the second connecting member 23, and the rotating central shaft 22.

[0046] like Figure 7 As shown, Figure 7 This is a schematic diagram of the handle assembly of this application. The handle assembly 1 includes an oil passage head 11, a reversing handle 12, and a reversing valve 13. The oil passage head 11 and the reversing valve 13 are connected through the reversing handle 12. The bottom of the reversing valve 13 is provided with a first oil hole 131 that is connected to the first oil passage 214. An external oil pump connector is connected to the handle assembly 1 through the oil passage head 11, thereby providing pressure to the hydraulic oil. The reversing valve 13 then selects the oil passage, thereby controlling the hydraulic oil to flow into the rotary oil passage mechanism 2 through the first oil hole 131.

[0047] Optionally, in this embodiment, the handle assembly 1 includes a reversing valve 13, which is fixedly mounted on the first connecting member 21 of the rotary oil passage mechanism 2, so that the first oil hole 131 of the reversing valve 13 is connected to the first oil passage 214 of the first connecting member 21, which facilitates the input of hydraulic oil. At the same time, the oil cylinder 3 is fixedly connected to the second connecting member 23, which also connects the oil cylinder 3 to the second connecting member 23, so that the hydraulic oil input by the reversing valve 13 can be transmitted to the oil cylinder 3 through the internal oil passage of the rotary oil passage mechanism 2, thereby realizing flexible control of the oil injection angle.

[0048] like Figure 8 As shown, Figure 8 The diagram shows the structure of the hydraulic cylinder of this application. The hydraulic cylinder 3 also includes a cylinder head 31, a cylinder body 32, a cylinder bottom 33, an oil passage pipe 34, and a handle 35. The handle 35 is fixedly connected to the side wall of the cylinder head 31 and the cylinder bottom 33 and is connected through the cylinder body 32. An oil passage pipe 34 is provided on the upper side of the cylinder body 32. The side wall of the cylinder head 31 is provided with a fourth oil hole 311 that communicates with the second oil passage 234. One of the fourth oil holes 311 is connected to the oil passage of the cylinder bottom 33 through the oil passage pipe 34. This arrangement can transmit hydraulic oil to the cylinder head 31 or the cylinder bottom 33 respectively.

[0049] In this embodiment, the cylinder head 31 of the hydraulic cylinder 3 has at least two oil passages. One oil passage is directly connected to the cylinder body 32, and the other oil passage is connected in sequence through the oil pipe 34, the cylinder bottom 33 and the cylinder body 32, so that oil can be injected into both ends of the hydraulic cylinder 3.

[0050] The jacking assembly 4 further comprises a jacking head 41, a first-stage piston 42, a second-stage piston 43 and a central oil pipe 44, the first-stage piston 42 is movably sleeved in the cylinder body 32 and the cylinder head 31, the second-stage piston 43 is movably sleeved in the first-stage piston 42, the central oil pipe 44 is arranged inside the second-stage piston 43, and the jacking head 41 is fixedly connected to the outer end of the second-stage piston 43 and the rear end of the cylinder bottom 33; through the oil pressure of the cylinder head 31 or the cylinder bottom 33, the first-stage piston 42 and the second-stage piston 43 are pushed to slide in the corresponding direction.

[0051] Specific working principle, when the jacking head 41 of the jacking device needs to be expanded, first, according to the actual environment, adjust the rotation angle of the rotating oil passing mechanism 2, so that the oil passing head 11 is connected to the oil pipe of the oil pump at a suitable angle, then the reversing valve 13 selects the oil path, the oil pump can provide hydraulic oil with a certain pressure, which is input into the first oil path 214, the third oil path 225 and the second oil path 234 on one side, then enters the oil cylinder 3, then the hydraulic oil enters the cylinder bottom 33 through the oil passing pipe 34, and then enters the cylinder body from the cylinder bottom 33, thereby pushing the first-stage piston 42 and the second-stage piston 43 to slide towards the cylinder head 31, realizing the expansion of the jacking head 41; when the jacking head 41 needs to be retracted, adjust the reversing valve 13 to reverse the oil path, so that the hydraulic oil enters the first oil path 214, the third oil path 225 and the second oil path 234 on the other side through the first oil hole 131, then directly enters the cylinder body 32 through the cylinder head 31, pushes the first-stage piston 42 and the second-stage piston 43 towards the cylinder bottom 33, thereby completing the retraction of the jacking head 41.

[0052] The handle assembly 1 of the present application can freely adjust the angle of the oil passing head 11, which facilitates the oil pump to be connected to the oil passing head 11 from various angles and provide hydraulic driving force to the jacking assembly 4, and adapt to various complex rescue environments. The handle and the oil passing head are directly connected and uniformly arranged, the transition joint parts are cancelled, the product use is more stable, and the oil leakage risk is reduced.

[0053] The above is only an embodiment of the present application, and does not limit the patent scope of the present application, any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A hydraulic jacking device, characterized in that, The utility model provides a kind of handle assembly, rotating oil mechanism and prop top assembly; Wherein, the prop top assembly includes oil cylinder, the handle assembly is pivoted with the oil cylinder by the rotating oil mechanism, and the handle assembly, the rotating oil mechanism and the internal oil circuit of the oil cylinder are communicated; The rotating oil mechanism includes the first connecting piece fixedly connected with the handle assembly, the rotating middle shaft and the second connecting piece fixedly connected with the oil cylinder; Wherein, the rotating middle shaft is pivoted with the first connecting piece and the second connecting piece;And the internal oil circuit of the first connecting piece, the rotating middle shaft and the second connecting piece is communicated; Meanwhile, the first connecting piece includes first base and two first extension parts extending from the first base non-parallelly, the first base is fixedly connected with the handle assembly, and the two first extension parts are oppositely and spacedly arranged;Wherein, in the axial direction of the rotating middle shaft, each first extension part is provided with first through hole, and the rotating middle shaft is provided through the first through hole and is pivoted with the first extension part; Meanwhile, the second connecting piece includes second base and second extension part extending from the second base non-parallelly, the second base is fixedly connected with the oil cylinder, the second extension part is arranged between the two first extension parts, and in the axial direction of the rotating middle shaft, the second extension part is provided with second through hole, the rotating middle shaft is provided through the second through hole, and the second extension part can rotate around the rotating middle shaft. The first base is internally provided with at least one first oil circuit, and the first oil circuit is communicated with one of the first through holes; 2. A hydraulic roof prop according to claim 1, characterised in that The second base is internally provided with at least one second oil circuit, and the second oil circuit is communicated with the second through hole; The rotating middle shaft is internally provided with at least one third oil circuit, and the two ends of the third oil circuit are respectively communicated with the first through hole and the second through hole, so that the first oil circuit, the second oil circuit and the third oil circuit are communicated. The handle assembly includes oil head and reversing handle and reversing valve, the oil head is communicated with the reversing valve through the reversing handle;Wherein, the bottom of the reversing valve is provided with first oil hole communicated with the first oil circuit.

3. A hydraulic roof prop according to claim 2, wherein The rotating middle shaft is provided with adjusting hole in the center of both sides, and the outer oil groove is provided on the outer end of both sides of the rotating middle shaft, and the second oil hole is provided in the inner part of the outer oil groove; 4. A hydraulic roof prop according to claim 3, wherein The inner oil groove is provided on the inner end of both sides of the rotating middle shaft, and the third oil hole is provided in the inner part of the inner oil groove;Wherein, the second oil hole and the third oil hole on the same side are communicated through the third oil circuit. The position of the first oil circuit corresponds to the outer oil groove, and the position of the second oil circuit corresponds to the inner oil groove.

5. A hydraulic roof prop according to claim 4, wherein The oil cylinder further includes cylinder head, cylinder body, cylinder bottom, oil pipe and holding handle, the cylinder head and the cylinder bottom side wall are fixedly connected with holding handle and are connected through the cylinder body, and the cylinder body upper side is provided with the oil pipe; 6. A hydraulic roof prop according to claim 4, wherein Wherein, the cylinder head side wall is provided with fourth oil hole communicated with the second oil circuit, and one of the fourth oil holes is communicated with the oil circuit of the cylinder bottom through the oil pipe. ​ 7. A hydraulic roof prop according to claim 6, wherein The jacking assembly further comprises a jacking head, a first piston, a second piston and a central oil pipe, the first piston is movably sleeved in the cylinder body and the cylinder head, the second piston is movably sleeved in the first piston, the central oil pipe is arranged inside the second piston, and the jacking head is fixed to the outer end of the second piston and the rear end of the cylinder bottom.

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