Heavy well lid opening device

Abstract

The utility model provides a heavy well lid opening device. The heavy well lid opening device comprises a support; the driving structure comprises a first fixing shaft, a first connected gear and a wrench connecting rod, and a first transmission wheel clamped with the wrench connecting rod is integrally, coaxially and fixedly arranged on the first connected gear; the conduction structure comprises a second fixing shaft and a second connected gear, a second transmission wheel is integrally, coaxially and fixedly arranged on the second connected gear, and the second connected gear is in meshing tooth fit with the first connected gear; the lifting structure comprises a third fixing shaft, a third connected gear, a mooring rope and a hook, a reel and a ratchet wheel are integrally, coaxially and fixedly arranged on the third connected gear, the third connected gear is matched with the second transmission wheel in a meshed mode, and the mooring rope is fixed to the reel; the limiting structure comprises a fourth fixing shaft, a pawl and a spring, one end of the spring is fixed to the first fixing shaft, and the other end of the spring is fixed to the pawl. The tool can greatly save manpower needed for opening the heavy well lid, has high bearing capacity, and is safe and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a heavy manhole cover opening device. Background Art

[0002] Concrete and other heavy manhole covers are often used in municipal sewage pipe networks. During pipeline construction and maintenance, the manhole covers need to be lifted, moved and installed. Existing manhole cover opening devices are mostly crowbar-type tools, which often require a large operating space, require high physical labor and pose safety hazards. In addition, crowbar-type tools are not only difficult to move after opening heavy manhole covers such as concrete, but also easily cause the manhole cover to fall into the well during installation, affecting production and maintenance work. Utility Model Content

[0003] In view of the deficiencies in the prior art, the present invention provides a heavy-duty manhole cover opening device. In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0004] Heavy-duty manhole cover opening device, including:

[0005] The bracket is frame-shaped, and a plurality of universal wheels are fixedly mounted on the bottom of the bracket to move on the road surface;

[0006] The driving structure comprises a first fixed shaft, a first conjoined gear and a wrench connecting rod, wherein the first fixed shaft is fixedly mounted on the bracket, the first conjoined gear is symmetrically mounted on the first fixed shaft, and a first transmission wheel connected to the wrench connecting rod is integrally and coaxially fixedly arranged on the first conjoined gear;

[0007] The transmission structure includes a second fixed shaft and a second conjoined gear, wherein the second fixed shaft is fixedly mounted on the bracket, the second conjoined gear is symmetrically mounted on the second fixed shaft, a second transmission wheel is integrally and coaxially fixedly arranged on the second conjoined gear, and the second conjoined gear meshes with the first conjoined gear;

[0008] The lifting structure includes a third fixed shaft, a third conjoined gear, a cable and a hook, wherein the third fixed shaft is fixed on the bracket, the third conjoined gear is symmetrically rotatably mounted on the third fixed shaft, a winch and a ratchet are integrally and coaxially fixedly arranged on the third conjoined gear, the third conjoined gear meshes with the second transmission wheel, the cable is fixed on the winch, and the hook is fixed at the end of the cable and is used to hook the heavy manhole cover;

[0009] The limiting structure includes a fourth fixed shaft, a pawl and a spring. The fourth fixed shaft is fixedly mounted on the bracket, the pawl is symmetrically mounted on the fourth fixed shaft, one end of the spring is fixed on the first fixed shaft, and the other end is fixed on the pawl, so as to clamp the pawl on the ratchet.

[0010] Furthermore, the radius of the second transmission wheel is smaller than the radius of the second conjoined gear, the radius of the second conjoined gear is larger than the radius of the first conjoined gear, and the radius of the third conjoined gear is larger than the radius of the second transmission wheel.

[0011] Furthermore, the cross section of the first transmission wheel is a square or a regular hexagon.

[0012] Furthermore, a handle is fixedly connected to the pawl.

[0013] Furthermore, the pawl is fixedly connected to a limiting portion adjacent to the outer edge of the ratchet wheel, and the handle is located between the end of the pawl and the limiting portion.

[0014] Furthermore, the second fixed axis and the third fixed axis are arranged horizontally and in parallel, and the first fixed axis is located above and in the center of the second fixed axis and the third fixed axis.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] Utilizing the lever principle and multi-gear transmission, the capstan is driven to rotate through the wrench connecting rod, driving the cable to be wound around the capstan, so that the cable lifts the manhole cover, and through the limiting effect of the ratchet, the manhole cover is stably lifted step by step within the frame of the bracket, which prevents reversal and slowly releases the cable. The universal wheel can support the horizontal movement of the equipment at any angle. Through the coordination of various structures, the tool can greatly save the manpower required to open heavy manhole covers. It has strong bearing capacity, safety and reliability, and can move freely in narrow lanes, providing convenience for maintenance work, effectively making up for the shortcomings of traditional manhole cover opening, which consumes manpower, is dangerous to operate, and damages the manhole cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of the gear matching in the embodiment of the utility model;

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the pawl and the ratchet wheel in the embodiment of the utility model.

[0021] In the above drawings: bracket 1, universal wheel 2, first fixed shaft 3, first connected gear 4, wrench connecting rod 5, first transmission wheel 6, second fixed shaft 7, second connected gear 8, second transmission wheel 9, third fixed shaft 10, third connected gear 11, cable 12, hook 13, winch 14, ratchet 15, fourth fixed shaft 16, pawl 17, spring 18, handle 19, limit part 20. DETAILED DESCRIPTION

[0022] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0023] like Figure 1~Figure 3 As shown, the embodiment of the utility model provides a heavy manhole cover opening device, comprising:

[0024] The bracket 1 is frame-shaped, and a plurality of universal wheels 2 are fixedly mounted on the bottom of the bracket 1 so as to move on the road surface;

[0025] The driving structure includes a first fixed shaft 3, a first conjoined gear 4 and a wrench connecting rod 5, wherein the first fixed shaft 3 is fixedly mounted on the bracket 1, the first conjoined gear 4 is symmetrically mounted on the first fixed shaft 3, and a first transmission wheel 6 engaged with the wrench connecting rod 5 is integrally and coaxially fixedly arranged on the first conjoined gear 4;

[0026] The transmission structure includes a second fixed shaft 7 and a second conjoined gear 8. The second fixed shaft 7 is fixedly mounted on the bracket 1. The second conjoined gear 8 is symmetrically mounted on the second fixed shaft 7. A second transmission wheel 9 is integrally and coaxially fixedly arranged on the second conjoined gear 8. The second conjoined gear 8 meshes with the first conjoined gear 4.

[0027] The lifting structure includes a third fixed shaft 10, a third conjoined gear 11, a cable 12 and a hook 13. The third fixed shaft 10 is fixed on the bracket 1. The third conjoined gear 11 is symmetrically mounted on the third fixed shaft 10. A winch 14 and a ratchet 15 are integrally and coaxially fixed on the third conjoined gear 11. The third conjoined gear 11 meshes with the second transmission wheel 9. The cable 12 is fixed on the winch 14. The hook 13 is fixed at the end of the cable 12 and is used to hook the heavy manhole cover.

[0028] The limiting structure includes a fourth fixed shaft 16, a pawl 17 and a spring 18. The fourth fixed shaft 16 is fixedly mounted on the bracket 1, and the pawl 17 is symmetrically mounted on the fourth fixed shaft 16. One end of the spring 18 is fixed on the first fixed shaft 3, and the other end is fixed on the pawl 17, so as to clamp the pawl 17 on the ratchet 15.

[0029] When lifting the manhole cover, Figure 1 , Figure 2As shown, the wrench connecting rod 5 is rotated clockwise, driving the first connected gear 4 to rotate clockwise, thereby driving the second connected gear 8 to rotate counterclockwise, and then driving the third connected gear 11 to rotate clockwise, and the rotating capstan 14 drives the cable 12 to be wound around the capstan 14, so as to be used to lift the manhole cover. During the clockwise rotation of the third connected gear 11, the pawl 17 cooperates with the ratchet 15 under the action of the spring 18 to prevent the ratchet 15 from reversing, thereby lifting the manhole cover step by step.

[0030] When lowering the manhole cover, slowly pull the pawl 17 to disengage the pawl 17 from the ratchet 15, then release the pawl 17, the pawl 17 is reset and stuck on the ratchet 15 under the action of the spring 18, repeat this action, slowly reverse the winch 14, and then lower the manhole cover.

[0031] In this embodiment, if Figure 1 As shown, the radius of the second transmission wheel 9 is smaller than the radius of the second conjoined gear 8, the radius of the second conjoined gear 8 is larger than the radius of the first conjoined gear 4, and the radius of the third conjoined gear 11 is larger than the radius of the second transmission wheel 9. The first conjoined gear 4 with a small radius drives the second conjoined gear 8 with a large radius, and the concentrically arranged second transmission wheel 9 with a small radius drives the third conjoined gear 11 with a large radius to rotate, thereby realizing labor-saving gear transmission, and with the lever effect of the wrench connecting rod 5, a heavy manhole cover can be easily lifted, realizing a more labor-saving manhole cover opening tool.

[0032] In this embodiment, if Figure 1 As shown, the cross section of the first transmission wheel 6 is a square or a regular hexagon. The cross section of the first transmission wheel 6 can be a regular polygon other than a regular triangle and a circle, but a square and a regular hexagon are commonly used, which facilitates the cooperation of the wrench connecting rod 5 and the first transmission wheel 6. After the first transmission wheel 6 is rotated, the wrench connecting rod 5 is separated from the first transmission wheel 6, and then they are matched at another angle to realize the continuous rotation of the first transmission wheel 6, which is convenient to use.

[0033] In this embodiment, if Figure 2 , Figure 3 As shown, a handle 19 is fixedly connected to the pawl 17. The handle 19 can be used to easily separate the pawl 17 from the ratchet 15, and only the handle 19 needs to be pressed, which is easy to operate.

[0034] In this embodiment, if Figure 3 As shown, the pawl 17 is also fixedly connected with a limiting portion 20 adjacent to the outer edge of the ratchet 15, and the handle 19 is located between the end of the pawl 17 and the limiting portion 20. The limiting portion 20 is arranged below the ratchet 15, and after the handle 19 is pressed, the limiting portion 20 can be against the ratchet 15, so as to avoid pressing the handle 19 too much and affecting the ratchet 15 to reverse too quickly.

[0035] In this embodiment, if Figure 1 As shown, the second fixed axis 7 and the third fixed axis 10 are arranged horizontally and in parallel, and the first fixed axis 3 is located above and in the middle of the second fixed axis 7 and the third fixed axis 10. Sufficient matching space is provided between the wrench connecting rod 5 and the first transmission wheel 6, so that the operator can rotate the first transmission wheel 6 conveniently.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. Heavy-duty manhole cover opening device, characterized in that: include: The bracket is frame-shaped, and a plurality of universal wheels are fixedly mounted on the bottom of the bracket to move on the road surface; The driving structure comprises a first fixed shaft, a first conjoined gear and a wrench connecting rod, wherein the first fixed shaft is fixedly mounted on the bracket, the first conjoined gear is symmetrically mounted on the first fixed shaft, and a first transmission wheel connected to the wrench connecting rod is integrally and coaxially fixedly arranged on the first conjoined gear; The transmission structure includes a second fixed shaft and a second conjoined gear, wherein the second fixed shaft is fixedly mounted on the bracket, the second conjoined gear is symmetrically mounted on the second fixed shaft, a second transmission wheel is integrally and coaxially fixedly arranged on the second conjoined gear, and the second conjoined gear meshes with the first conjoined gear; The lifting structure includes a third fixed shaft, a third conjoined gear, a cable and a hook, wherein the third fixed shaft is fixed on the bracket, the third conjoined gear is symmetrically rotatably mounted on the third fixed shaft, a winch and a ratchet are integrally and coaxially fixedly arranged on the third conjoined gear, the third conjoined gear meshes with the second transmission wheel, the cable is fixed on the winch, and the hook is fixed at the end of the cable and is used to hook the heavy manhole cover; The limiting structure includes a fourth fixed shaft, a pawl and a spring. The fourth fixed shaft is fixedly mounted on the bracket, the pawl is symmetrically mounted on the fourth fixed shaft, one end of the spring is fixed on the first fixed shaft, and the other end is fixed on the pawl, so as to clamp the pawl on the ratchet.

2. The heavy manhole cover opening device according to claim 1, characterized in that: The radius of the second transmission wheel is smaller than the radius of the second conjoined gear, the radius of the second conjoined gear is larger than the radius of the first conjoined gear, and the radius of the third conjoined gear is larger than the radius of the second transmission wheel.

3. The heavy manhole cover opening device according to claim 1, characterized in that: The cross section of the first transmission wheel is a square or a regular hexagon.

4. The heavy manhole cover opening device according to claim 1, characterized in that: The ratchet is fixedly connected with a handle.

5. The heavy manhole cover opening device according to claim 4, characterized in that: The pawl is also fixedly connected with a limiting portion adjacent to the outer edge of the ratchet wheel, and the handle is located between the end of the pawl and the limiting portion.

6. The heavy manhole cover opening device according to claim 1, characterized in that: The second fixed axis and the third fixed axis are arranged horizontally and in parallel, and the first fixed axis is located above and in the center of the second fixed axis and the third fixed axis.

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