Portable hydraulic manhole cover lifter

Abstract

This utility model provides a portable hydraulic manhole cover puller, including a main beam, a first lifting frame, a second lifting frame, and an auxiliary support. The main beam is a telescopic beam structure, with a pulling component installed in front of the telescopic structure. The first and second lifting frames are respectively located on both sides of the main beam. The auxiliary support is located on the main beam and hinged to it. A jack is detachably connected to the bottom of the first lifting frame. By setting the auxiliary support structure, the hinge provides additional support points for the puller, ensuring stability during pulling and reducing tilting of the puller caused by unbalanced force application, which would affect normal operation. In addition, the structure of this application, through the hinge and detachable connection, facilitates the separate storage and carrying of the entire puller, as well as folding it for carrying when going out to work. It is more convenient to carry and occupies less space.

Description

Technical Field

[0001] This utility model relates to the field of manhole cover dismantling equipment processing technology, and in particular to a portable hydraulic manhole cover puller. Background Technology

[0002] Manhole covers are used to cover deep wells in roads or homes to prevent people or objects from falling in. They can be classified by material, such as metal manhole covers, high-strength fiber-reinforced concrete manhole covers, and resin manhole covers, and are generally available in round and square shapes. They can be used in green belts, sidewalks, driveways, docks, alleyways, etc.

[0003] Since manhole covers are often used to cover sewers, heating pipes, or power lines, they are generally very tightly fitted after installation. Furthermore, manhole covers are often located on roads, and the pressure from pedestrians and vehicles, as well as the accumulation of dirt in the gaps, makes the connection between the cover and its location extremely tight. Disassembling them often requires tools. Current technology typically uses simple tools like pry bars to lift the covers. While portable, this is inconvenient, requiring considerable force and a precise angle to pry them off, resulting in a poor user experience. To address this, some manhole cover pullers have emerged, such as the Chinese utility model patent CN222846436U, which describes a multi-functional puller. This new puller structure allows for adjustable fulcrum positions compared to traditional pry bars, and its longer application end makes lifting manhole covers easier. However, it still requires significant physical effort from workers, and the long handle structure makes it difficult to carry. Of course, there are also structures on the market that use jacks to lift manhole covers, but these structures are often integrally molded, which is not only heavy, but also inconvenient to carry due to the integrated support structure.

[0004] Therefore, existing technologies need further improvement. Utility Model Content

[0005] This utility model proposes a portable hydraulic manhole cover puller to overcome the shortcomings of existing technologies.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a portable hydraulic manhole cover puller, comprising a main beam, a first lifting frame, a second lifting frame, and an auxiliary support. The main beam is a telescopic beam structure, with a puller component installed in front of the telescopic structure. The first and second lifting frames are respectively installed on both sides of the main beam. The auxiliary support is installed on the main beam and hinged to it. A jack is detachably connected to the bottom of the first lifting frame.

[0007] In a preferred embodiment of this application, the lifting member is detachably connected to the main beam.

[0008] In a preferred embodiment of this application, a sliding sleeve is fitted on the surface of the main beam, a positioning element is provided between the sliding sleeve and the main beam, and the sliding sleeve is detachably connected to the puller.

[0009] In a preferred embodiment of this application, a secondary beam is provided inside the main beam, the secondary beam is telescopically connected to the main beam, the end of the secondary beam protrudes from the main beam, the secondary beam is provided with a connecting frame, and the connecting frame is detachably connected to the lifting member.

[0010] In a preferred embodiment of this application, a support frame is hinged at the end of the sub-beam, and a connection port is provided below the hinged position, which can be connected to a jack.

[0011] In a preferred embodiment of this application, the manhole cover puller also includes a cleaning rod, and a slot structure is provided on the top of the main beam, with the cleaning rod being engaged in the slot.

[0012] In a preferred embodiment of this application, an auxiliary support rod is provided at the bottom of the end of the auxiliary bracket, and multiple positioning holes are opened on the surface of the auxiliary bracket. The auxiliary support rod is detachably connected to the positioning holes.

[0013] In summary, the beneficial effects of this utility model are as follows:

[0014] This application utilizes a first and second lifting frame. The first lifting frame connects to a jack, eliminating the need for extensive manual labor to lift manhole covers, making it convenient to use. The second lifting frame can directly press down on the manhole cover, requiring no additional personnel and ensuring easy lifting. Furthermore, the auxiliary support structure provides additional support points for the lifting device via hinges, ensuring stability during lifting and reducing tilting caused by uneven force application, thus minimizing disruption to normal operation. Additionally, the hinged and detachable connection design allows for easy separate storage and folding of the lifting device, making it convenient for workers to carry while working outdoors, and requiring minimal space. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the extended sub-beam of this utility model;

[0017] Figure 3 This is a top view of the structure of this utility model.

[0018] Legend: 1. Main beam; 2. First lifting frame; 3. Second lifting frame; 4. Auxiliary support; 5. Lifting component; 6. Jack; 8. Sliding sleeve; 9. Sub-beam; 10. Connecting frame; 11. Support frame; 12. Cleaning rod; 13. Slot; 14. Rod body; 15. Seat body. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Reference Figure 1-3 As shown, a portable hydraulic manhole cover puller includes a main beam 1, a first lifting frame 2, a second lifting frame 3, and an auxiliary support 4. The main beam 1 is a telescopic beam structure, with a lifting component 5 installed in front of the telescopic structure. The first and second lifting frames are respectively installed on both sides of the main beam 1. The auxiliary support 4 is installed on the main beam 1 and hinged to it. A jack 6 is detachably connected to the bottom of the first lifting frame.

[0025] Among them, such as Figure 1As shown, the main beam 1 is a crossbar structure with a hollow interior and a sliding track structure. A secondary beam 9 is installed inside the main beam 1. The secondary beam 9 is telescopically connected to the main beam 1, which facilitates the entry and exit of the secondary beam 9 into the main beam 1. The end of the secondary beam 9 protrudes from the main beam 1 and leaves an opening for pulling out the secondary beam 9. In order to improve the load-bearing strength, a cross-shaped reinforcing rib structure can be set inside the secondary beam 9.

[0026] In addition, for the auxiliary support structure 4, such as Figure 2 As shown, the part connected to the main beam 1 has convex plate structures on the upper and lower sides, and the main beam 1 has threaded columns that are hinged to the auxiliary support 4 to realize the swing of the auxiliary support 4.

[0027] Furthermore, the lifting component 5 is detachably connected to the main beam 1. The structure of the lifting component 5 can be a straight rod structure. If a straight rod structure is used, a connection port 13 or a strip groove for the tube to pass through is required on the surface of the main beam 1, and it is fixed by a threaded nut. Of course, a hook structure can be used. For the hook structure, a hooking position is required at the bottom of the main beam 1. The hook can be a large solid hook, or a chain hook can be used to increase the hooking height.

[0028] As a preferred embodiment of this application, such as Figure 3 As shown, a sliding sleeve 8 is fitted on the surface of the main beam 1, and a positioning element is provided between the sliding sleeve 8 and the main beam 1. The sliding sleeve 8 is detachably connected to the puller. In this embodiment, the sliding sleeve 8 can be conveniently adjusted to adjust the hook position. The positioning element can be a screw structure. The main beam 1 and the positioning element are provided with a strip hole structure. After sliding to a suitable position, the screw can be used to lock the position to ensure the normal operation of the puller.

[0029] Furthermore, the end of the secondary beam 9 protrudes from the main beam 1, and the secondary beam 9 is equipped with a connecting frame 10, which is detachably connected to the lifting component 5. It is understandable that the connecting frame 10 on the secondary beam 9 allows the lifting component 5 to also be installed there. For some manhole covers, due to their large structure, two lifting openings are provided. Therefore, the secondary beam 9 also provides the conditions for installing the lifting component 5, allowing simultaneous lifting of both sides of the manhole cover, facilitating its removal from the manhole.

[0030] In addition, a support frame 11 is hinged at the end of the sub-beam 9, and a connection port 13 is provided below the hinge position, which can be connected to the jack 6. The hinged support frame 11 can be hinged to change its position from collinear with the sub-beam 9 to perpendicular to the sub-beam 9 when no puller is needed, thus supporting the puller. When the jack 6 is needed, it can be changed from a vertical position back to a horizontal position, and the jack 6 can be connected to the connection port 13 at the bottom of the sub-beam 9, which facilitates the application of force by two jacks 6 and allows for more stable lifting of the manhole cover.

[0031] In a preferred embodiment, such as Figure 3 As shown, the manhole cover puller also includes a cleaning rod 12. A slot 13 structure is provided on the top of the main beam 1, and the cleaning rod 12 is engaged in the slot 13. Regarding the structure of the cleaning rod 12, after the manhole cover has been used for a long time, a lot of dust, dirt or other impurities will remain in the gap between it and the ground. These impurities will affect the manhole cover puller and interfere with it. The head end of the cleaning rod 12 is provided with a pointed structure and a certain curvature. The pointed structure scrapes back and forth in the gap to remove the impurities in the gap.

[0032] Furthermore, to facilitate the removal and insertion of the cleaning rod 12, the slot 13 structure can use a plastic buckle with a certain degree of elasticity. When not in use, simply insert the rod body 14 of the cleaning rod 12 into it for removal. To prevent injury to personnel from the pointed structure during transport, a placement opening can be provided at the top of the main beam 1, with the pointed structure facing the placement opening to partially conceal it and improve carrying safety. Moreover, to facilitate carrying the entire puller, a handle can also be provided at the top of the main beam 1. The handle is offset from the slot 13 and is at a higher height, reducing the impact on the removal and insertion of the slot 13 and the cleaning rod 12.

[0033] Optionally, such as Figure 1 and Figure 2 As shown, an auxiliary support rod is provided at the bottom of the auxiliary bracket 4. Multiple positioning holes are opened on the surface of the auxiliary bracket 4. The auxiliary support rod is detachably connected to the positioning holes, which makes it convenient to connect the auxiliary support rod by threading when in use, and can be removed when not in use to reduce the space occupied.

[0034] Furthermore, for ease of carrying, a slot 13 structure similar to that on the top of the main beam 1 can be provided on the surface of the auxiliary support 4. The auxiliary support rod 14, when not in use, can be snapped onto the top of the auxiliary support 4. The auxiliary support rod can be divided into a rod body 14 and a base 15. The base 15 can be set as a small disc-shaped structure with an anti-slip pad at the bottom. When in use, the two are assembled together. When not in use, a screw hole can be opened on the side of the auxiliary support 4. The screw at the top of the base 15, which is used to cooperate with the rod body 14, can be inserted into the screw hole of the auxiliary support 4 to carry the base 15, further reducing the space occupied by the entire puller and making it easier to carry.

[0035] All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. At the same time, the electrical components mentioned in this application are all connected to an external power supply and control switch when in use. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art, which is common knowledge in the field. Therefore, this utility model will not explain the control method and circuit connection in detail. Moreover, the external controller mentioned in the specification can play a control role for the electrical components mentioned in this article, and the external controller is a conventional known device.

[0036] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above are only preferred embodiments of this utility model. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this utility model, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. A portable hydraulic manhole cover puller, characterized in that, It includes a main beam, a first lifting frame, a second lifting frame, and an auxiliary support. The main beam is a telescopic beam structure with a lifting device in front of the telescopic structure. The first and second lifting frames are respectively located on both sides of the main beam. The auxiliary support is located on the main beam and is hinged to it. A jack is detachably connected to the bottom of the first lifting frame.

2. The portable hydraulic manhole cover puller as described in claim 1, characterized in that, The lifting member is detachably connected to the main beam.

3. A portable hydraulic manhole cover puller as described in claim 2, characterized in that, A sliding sleeve is fitted on the surface of the main beam, and a positioning element is provided between the sliding sleeve and the main beam. The sliding sleeve is detachably connected to the puller.

4. A portable hydraulic manhole cover puller as described in claim 3, characterized in that, A secondary beam is provided inside the main beam. The secondary beam is telescopically connected to the main beam. The end of the secondary beam protrudes from the main beam. A connecting frame is provided on the secondary beam. The connecting frame is detachably connected to the lifting member.

5. A portable hydraulic manhole cover puller as described in claim 4, characterized in that, The end of the secondary beam is hinged to a support frame, and a connection port is provided below the hinge position, which can be connected to a jack.

6. A portable hydraulic manhole cover puller as described in claim 1, characterized in that, The manhole cover puller also includes a cleaning rod, and a slot structure is provided on the top of the main beam, into which the cleaning rod is engaged.

7. A portable hydraulic manhole cover puller as described in claim 1, characterized in that, An auxiliary support rod is provided at the bottom of the end of the auxiliary bracket, and multiple positioning holes are opened on the surface of the auxiliary bracket. The auxiliary support rod is detachably connected to the positioning holes.

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