Jacking device and vehicle comprising jacking device

Abstract

The utility model provides a jack and a vehicle including the jack, the jack includes casing pipe, piston rod, power mechanism and sealing cap, the piston rod is provided in the casing pipe along the axial direction of casing pipe, one end of casing pipe is provided with an opening and is fixed with the sealing cap to seal the opening, and the power mechanism is provided with the sealing cap. The power mechanism is arranged in the other end of the sleeve and used for enabling the piston rod to be ejected outwards from the opening. A thrust table extending outwards in the radial direction of the piston rod is arranged at the end, close to the power mechanism, of the piston rod. And a thrust washer is fixed in one end of the sleeve, and when the piston rod is ejected outwards, the thrust washer is used for limiting the thrust table. According to the utility model, the piston rod in high-energy motion can be effectively limited in the ejection process of the piston rod, and the sealing performance in the sleeve is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile safety, in particular to a jacking device and a vehicle comprising the jacking device. Background Art

[0002] In the prior art, a lifter is usually installed on the front hood of a vehicle. At the moment of a pedestrian collision with the vehicle, the lifter can lift the front hood, raising the rear end of the front hood to a certain height. This creates a certain amount of space for the pedestrian to collapse when the pedestrian's head hits the front hood, thereby achieving the purpose of protecting the pedestrian.

[0003] Existing lifters consist of a casing, a piston rod, and a generator. The generator is fixed to the bottom of the casing, which has an opening at the top. The piston rod is positioned axially within the casing. When the generator is activated, the piston rod is ejected from the opening and stopped at a stop angle within the casing. However, for high-capacity lifters, the energy generated by the piston rod during movement is too high, easily exceeding the stop angle of the casing, causing the piston rod to fly out of the casing, thus failing to protect pedestrians. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides a jacking device and a vehicle including the jacking device, so as to effectively limit the high-energy movement of the piston rod during the ejection process of the piston rod and ensure the sealing of the interior of the sleeve.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] On one hand, the utility model provides a jacking device, comprising a sleeve, a piston rod, a power mechanism and a sealing cap, wherein the piston rod is arranged in the sleeve along the axial direction of the sleeve, one end of the sleeve is provided with an opening and the sealing cap is fixed to seal the opening, and the power mechanism is arranged inside the other end of the sleeve, and the power mechanism is used to push the piston rod out from the opening;

[0007] A thrust platform extending radially outward along the piston rod is provided at one end of the piston rod adjacent to the power mechanism; a thrust washer is fixed inside one end of the sleeve, and when the piston rod is pushed outward, the thrust washer is used to limit the thrust platform.

[0008] Furthermore, the sealing cap is sleeved on the one end of the sleeve and has an interference fit with the sleeve.

[0009] Furthermore, the thrust washer includes a side wall and a protrusion extending radially outward from the side wall to form the opening, and the sealing cap includes an undercut portion that is snap-fitted with the protrusion.

[0010] Further, the protrusion is formed to have a tip, and the undercut portion is formed in a hook shape to engage with the tip.

[0011] Furthermore, a circumferentially extending step surface is formed between the side wall of the thrust washer and the protrusion, and the sealing cap has an extrusion boss extending toward the step surface, and the extrusion boss is used to squeeze the top sealing ring onto the step surface.

[0012] Furthermore, the sealing cap has a weakened area corresponding to the end position of the piston rod, and when the piston rod is pushed outward, the weakened area can be separated from the sealing cap.

[0013] Furthermore, a tear line is provided at the edge of the weakened area.

[0014] Furthermore, a sealing gasket is provided between the piston rod and the sleeve, and the sealing gasket is provided adjacent to the thrust washer.

[0015] Furthermore, the power mechanism is a gas generator.

[0016] Another aspect of the present invention provides a vehicle, comprising the jacking device as described above.

[0017] By adopting the above technical solution, the utility model has the following beneficial effects:

[0018] The utility model has a simple and compact structure. A thrust platform extending radially outward along the piston rod is provided at one end of the piston rod adjacent to the power mechanism. A thrust washer is fixed inside one end of the sleeve opening. When the piston rod is pushed outward, the thrust washer abuts against the thrust platform, thereby effectively limiting the position of the piston rod for high-energy movement. At the same time, a sealing cap is fixed at one end of the sleeve opening to seal the inside of the sleeve, thereby preventing corrosion of the piston rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a longitudinal sectional view of the jacking device in Example 1 of the present utility model;

[0020] Figure 2 Schematic diagram of the initial state of the top of the jack in embodiment 1 of the present invention;

[0021] Figure 3 This is a schematic diagram of the final state of the top of the jack in embodiment 1 of the present invention;

[0022] Figure 4 This is an exploded view of the jacking device in Example 1 of the present utility model;

[0023] Figure 5This is a longitudinal sectional view of the jacking device in Example 2 of the present utility model;

[0024] Figure 6 Schematic diagram of the initial state of the top of the jack in embodiment 2 of the present invention;

[0025] Figure 7 This is a schematic diagram of the final state of the top of the jack in Embodiment 2 of the present utility model;

[0026] Figure 8 This is an exploded view of the jacking device in Example 2 of the present utility model. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] The terms used in this utility model are for the purpose of describing specific embodiments only and are not intended to limit the present disclosure. The singular forms "a", "an", "the" and "the" used in this disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items. Example 1

[0029] This embodiment provides a jacking device, which is installed by a bracket 6 (see Figure 1 ) is fixed to the vehicle to lift the vehicle's hood to protect pedestrians.

[0030] like Figures 1 to 4 As shown, the jacking device of this embodiment mainly includes a sleeve 3, a piston rod 5, a power mechanism 11 and a sealing cap 1. Among them, the piston rod 5 is arranged in the sleeve 3 along the axial direction of the sleeve 3, and the piston rod 5 is only circumferentially closed between the bottom and the inner wall of the sleeve 3, and there is a certain gap in the rest of the part to facilitate the movement of the piston rod 5. One end (top end) of the sleeve 3 is provided with an opening, and a sealing cap 1 is fixed to seal the opening. In the initial state, the top end of the piston rod 5 is adjacent to the opening of the sleeve 3. A power mechanism 11 is provided inside the other end (bottom end) of the sleeve 3 to push the piston rod 5 out from the opening through the sealing cap 1.

[0031] In addition, one end (bottom end) of the piston rod 5 adjacent to the power mechanism 11 is also provided with a thrust platform 51 extending radially outward along the piston rod 5, and the thrust platform 51 is circumferentially closed to the sleeve 3; a thrust washer 2 adjacent to the opening is also fixed inside the top end of the sleeve 3. When the piston rod 5 is pushed outward until the thrust platform 51 at its bottom directly or indirectly abuts against the thrust washer 2, the thrust washer 2 can limit the thrust platform 51, thereby preventing the piston rod 5 from flying out of the sleeve 3.

[0032] The thrust washer 2 is a separate component and can be fixed to the inner wall of the sleeve 3 by welding, such as by a furnace brazing process; the thrust platform 51 can be separately processed on the piston rod 5 or can be integrally formed with the piston rod 5.

[0033] It can be seen that the utility model has a simple and compact structure. A thrust platform 51 extending radially outward along the piston rod 5 is provided at one end of the piston rod 5 adjacent to the power mechanism 11; a thrust washer 2 is fixed inside the open end of the sleeve 3. When the piston rod 5 is pushed outward, the thrust washer 2 abuts against the thrust platform 51, thereby effectively limiting the high-energy movement of the piston rod 5; at the same time, by fixing the sealing cap 1 at the open end of the sleeve 3, the interior of the sleeve 3 can also be sealed, thereby preventing the piston rod 5 from being corroded.

[0034] In this embodiment, the sealing cap 1 is sleeved on the open end of the sleeve 3 and has an interference fit with the sleeve 3 to achieve reliable sealing.

[0035] In one embodiment, a sealing gasket 4 is provided between the piston rod 5 and the sleeve 3. The sealing gasket 4 is positioned adjacent to the thrust washer 2 to further ensure airtightness between the piston rod 5 and the sleeve 3 and to guide the movement of the piston rod 5. When the piston rod 5 is ejected, if the thrust stop 51 at the bottom of the piston rod 5 moves past the sealing gasket 4 and abuts the thrust washer 2, further ejection is stopped.

[0036] In one embodiment, the sealing cap 1 further has a weakened area (not shown) corresponding to the end position of the piston rod 5. When the piston rod 5 is pushed outward, the weakened area can be separated from the sealing cap 1. Preferably, the edge of the weakened area is provided with a tear line to facilitate separation of the weakened area.

[0037] like Figure 3 As shown, when the piston rod 5 passes through the sealing cap 1 , the sealing cap 1 will be separated into two parts from the weakened area, the sealing area will be pushed out by the piston rod 5 , and the remaining area will remain sleeved on the sleeve 3 .

[0038] See again Figure 1 、 3 As shown in Figures 4 and 5 , a bottom sealing ring 7 is also provided at the bottom of the piston rod 5 to achieve sealing between the bottom of the piston rod 5 and the sleeve 3.

[0039] In this embodiment, the power mechanism 11 provides power in the following ways, including but not limited to: a mixture of compressed gas and gas generating agent, gas generating agent, electromagnetic, or strong spring, etc. Figure 1 and Figure 4 In the illustrated embodiment, the power mechanism 11 is implemented by a gas generator, which can quickly generate gas after being triggered to serve as a power source for the jacking device.

[0040] In one embodiment, the jacking device of this embodiment may further include a bushing 8 fixed inside the other end (bottom end) of the casing 3. The gas generator is limitedly mounted within the bushing 8 to prevent displacement of the gas generator. The bushing 8 may be fixed within the casing 3 using adhesive tape 9 or other means.

[0041] In addition, the jacking device of this embodiment may further include a heat shrink tube 10 fixed to the outside of the other end of the sleeve 3, which is used to protect the sleeve 3 and the gas generator inside it.

[0042] The working principle of the jacking device provided in this embodiment is as follows:

[0043] like Figure 1 and 2 As shown, when the jack is not ignited, the sealing cap 1 and the sleeve 3 are interference-fitted. The interference-fit structure can isolate the external environment, ensure the sealing of the jack, and prevent the gas-generating agent from getting wet during the jack is stationary or in service, or from failure due to other factors. Figure 3 As shown, after the gas generator is ignited, the sealing cap 1 is destroyed by the piston rod 5 in the weakened area, the piston rod 5 is pushed out, and is limited in displacement by the abutment of the thrust washer 2 against its thrust platform 51, thereby preventing the piston rod 5 from flying out of the sleeve 3 as a whole.

[0044] Example 2

[0045] This embodiment further improves the structures of the thrust washer 2 and the sealing cap 1 on the basis of the embodiment 1.

[0046] Specific as Figure 5-8 As shown, the thrust washer 2 of this embodiment includes a sidewall 21 and a protrusion 22 extending radially outward from the sidewall 21 to form an opening. The sealing cap 1 is configured to include an undercut 13 that engages with the protrusion 22. This improves the connection stability between the thrust washer 2 and the sealing cap 1, enabling more effective position retention and enhancing the seal within the sleeve 3, while reducing the surface protection requirements for components within the sleeve 3. To enhance the position retention effect of the thrust washer 2, the thickness of its sidewall 21 is preferably approximately equal to the radial distance between the piston rod 5 and the sleeve 3.

[0047] See again Figure 6 and Figure 7 As shown, the protrusion 22 in this embodiment is formed to have a tip, and the undercut portion 13 of the sealing cap 1 is formed to be hook-shaped to engage with the tip of the protrusion 22, so that the sealing cap 1 is easy to install.

[0048] In this embodiment, a circumferentially extending step surface is formed between the side wall 21 and the protrusion 22 of the thrust washer 2, and a top sealing ring 12 is provided on the step surface; the sealing cap 1 has an extrusion boss (not shown) extending toward the step surface, so as to squeeze the top sealing ring 12 onto the step surface, thereby further improving the sealing performance of the sealing cap 1 and the thrust washer 2.

[0049] Example 3

[0050] This embodiment provides a vehicle, which includes the jacking device provided in Example 1 or Example 2, so that the hood of the vehicle can be effectively lifted to achieve the purpose of protecting pedestrians.

[0051] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of protection of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of protection of the present invention.

Claims

1. A jacking device, characterized in that: The invention comprises a sleeve, a piston rod, a power mechanism and a sealing cap, wherein the piston rod is arranged in the sleeve along the axial direction of the sleeve, one end of the sleeve is provided with an opening and the sealing cap is fixed thereto to seal the opening, and the power mechanism is arranged inside the other end of the sleeve, and the power mechanism is used to push the piston rod out from the opening; A thrust platform extending radially outward along the piston rod is provided at one end of the piston rod adjacent to the power mechanism; a thrust washer is fixed inside one end of the sleeve, and when the piston rod is pushed outward, the thrust washer is used to limit the thrust platform.

2. The jacking device according to claim 1, characterized in that: The sealing cap is sleeved on the one end of the sleeve and is interference fit with the sleeve.

3. The jacking device according to claim 2, characterized in that: The thrust washer includes a side wall and a protrusion extending radially outward from the side wall to form the opening, and the sealing cap includes an undercut portion that is snap-fitted with the protrusion.

4. The jacking device according to claim 3, characterized in that: The protrusion is formed to have a tip, and the undercut is formed in a hook shape to engage with the tip.

5. The jacking device according to claim 3, characterized in that: A circumferentially extending step surface is formed between the side wall of the thrust washer and the protrusion, and the sealing cap has an extrusion boss extending toward the step surface, and the extrusion boss is used to press the top sealing ring onto the step surface.

6. The jacking device according to any one of claims 1 to 5, characterized in that: The sealing cap has a weakened area corresponding to the end position of the piston rod, and when the piston rod is pushed outward, the weakened area can be separated from the sealing cap.

7. The jacking device according to claim 6, characterized in that: The edges of the weakened area are provided with tear lines.

8. The jacking device according to any one of claims 1 to 5, characterized in that: A sealing gasket is further provided between the piston rod and the sleeve, and the sealing gasket is arranged adjacent to the thrust washer.

9. The jacking device according to any one of claims 1 to 5, characterized in that: The power mechanism is a gas generator.

10. A vehicle, characterized in that: The vehicle comprises a jack as claimed in any one of the preceding claims 1-9.

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