Novel mara puller for excavator

Abstract

The invention discloses a novel mara puller for an excavator, and relates to the technical field of building equipment. Comprising a shaft barrel, a section is arranged in the shaft barrel, two pairs of first threaded holes are formed in the shaft barrel and located on one side of the section, two pairs of second threaded holes are formed in the shaft barrel and located on the other side of the section, and jackscrew threaded holes are formed in the shaft barrel and located between the two pairs of second threaded holes. A pair of fixing threaded holes is formed in the bottom of the shaft barrel, convex faces are arranged on the two sides of the shaft barrel, and a built-in sleeve is arranged in the shaft barrel. A structure convenient to replace is designed, the device does not need to be pressed, after the rotating shaft is inserted, the rotating shaft can be directly replaced, screws and nuts penetrate through two pairs of first threaded holes and second threaded holes correspondingly, the interior of the sleeve is fixed, the rotating shaft is tightly sleeved, the sealing performance is good, the device is suitable for riverway excavation, the contact face and the friction face are increased, and the shaft is not prone to being broken; and the service life is 8-10 years, the cost is low, and a driver can directly replace the device quickly and conveniently.

Description

Technical Field

[0001] The invention relates to the technical field of construction equipment, in particular to a new type of horse-drawn head for an excavator. Background Art

[0002] The excavator arm is an important part of the excavator, which includes a connecting rod and a horse-drawn head, and the horse-drawn head is used to insert the bucket pin. The existing horse-drawn head includes a shaft cylinder and a sleeve installed in the shaft cylinder, and the shaft cylinder is welded to the connecting rod. The existing horse-drawn head is difficult to replace. If the horse-drawn head needs to be replaced, the old shaft cylinder needs to be cut off, and then the shaft cylinder of the new horse-drawn head is connected to the connecting rod.

[0003] In the process of realizing the present invention, the inventors found that the prior art had the following problems: the horse heads on the market are pressed in, and have two sealing sleeves inside, which are easy to get into water and sand, and the shaft is easy to break. The average life span is 1-2 years, and welding is required for replacement. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a new type of horse-drawn head for an excavator, which solves the existing

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a new type of horse pulling head for an excavator, including a shaft cylinder, a section is provided in the shaft cylinder, two pairs of first threaded holes are provided on the shaft cylinder and located on one side of the section, two pairs of second threaded holes are provided on the shaft cylinder and located on the other side of the section, a top screw threaded hole is provided on the shaft cylinder and located between the two pairs of the second threaded holes, a pair of fixing threaded holes is provided at the bottom of the shaft cylinder, convex surfaces are provided on both sides of the shaft cylinder, and a built-in sleeve is provided in the shaft cylinder.

[0006] Preferably, the inner portion of the built-in sleeve has a friction surface.

[0007] Preferably, two pairs of the first threaded holes are respectively connected to two pairs of the second threaded holes.

[0008] Preferably, the pair of convex surfaces are both annular.

[0009] Beneficial Effects

[0010] The present invention provides a new type of horse head for an excavator. The present invention designs a structure for easy replacement. The device does not need to be pressed. After the rotating shaft is inserted, it can be directly replaced. The screws and nuts are respectively passed through two pairs of first threaded holes and second threaded holes to fix the inside of the sleeve, and the rotating shaft is tightly sleeved with good sealing. It is suitable for river channel excavation. There is only one sleeve inside, and the contact surface and friction surface are increased. The shaft is not easy to break. The service life is 8-10 years and the cost is low. The driver can directly replace it, which is quick and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0012] Figure 2 It is a schematic diagram of the back structure of the present invention.

[0013] Figure 3 It is a schematic diagram of the bottom structure of the present invention.

[0014] Figure 4 It is a schematic diagram of the internal section of the present invention.

[0015] In the figure: 1, shaft cylinder; 2, first threaded hole; 3, cross section; 4, second threaded hole; 5, top screw threaded hole; 6, convex surface; 7, fixed threaded hole; 8, built-in sleeve. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] See also Figure 1-4 The present invention provides a technical solution: a new type of horse head for an excavator, comprising a shaft cylinder 1, a section 3 is provided in the shaft cylinder 1, two pairs of first threaded holes 2 are provided on the shaft cylinder 1 and located on one side of the section 3, two pairs of second threaded holes 4 are provided on the shaft cylinder 1 and located on the other side of the section 3, a top screw threaded hole 5 is provided on the shaft cylinder 1 and located between the two pairs of the second threaded holes 4, a pair of fixing threaded holes 7 are provided at the bottom of the shaft cylinder 1, convex surfaces 6 are provided on both sides of the shaft cylinder 1, and a built-in sleeve 8 is provided in the shaft cylinder 1.

[0018] This embodiment is further configured such that a friction surface is provided inside the inner sleeve 8. Increasing the friction surface can reduce the problem of shaft breakage.

[0019] This embodiment is further configured such that two pairs of the first threaded holes 2 are respectively connected to two pairs of the second threaded holes 4. The two pairs are fixedly connected by bolts and nuts, so that the inside of the device is tightened, which has better fastening and is convenient for disassembly and replacement.

[0020] This embodiment is further configured such that the pair of convex surfaces 6 are both annular. The convex surface of the link increases the contact range between the device and the rotating shaft, expands the contact surface, and can reduce the problem of broken shaft.

[0021] The detailed connection means are well-known in the art. The following mainly introduces the working principle and process. The specific work is as follows.

[0022] Embodiment: This device does not need to be pressed, and can be directly replaced and fixed on the forearm of the excavator by screws and nuts. First, the rotating shaft is inserted into the sleeve 1. Since the section 3 is opened, the space inside the sleeve 1 is adjustable. After the rotating shaft is inserted, the sleeve 1 is fixed by two pairs of first threaded holes 2 and second threaded holes 4 respectively. The section 3 is closed and close to tighten the rotating shaft. The top threaded hole 5 is fixed by a top screw, and there is a pair of fixed threaded holes 7 that are fixed by fixing screws to prevent the rotating shaft from shaking inside the built-in sleeve 8. The surface of the built-in sleeve 8 has a friction surface, the contact surface and the friction surface are increased, and the shaft is not easy to break.

[0023] It should be noted that, in this document, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

Claims

1. A new type of horse-drawn head for an excavator, comprising a shaft cylinder (1), characterized in that: The shaft cylinder (1) is provided with a section (3) inside, two pairs of first threaded holes (2) are provided on the shaft cylinder (1) and located on one side of the section (3), two pairs of second threaded holes (4) are provided on the shaft cylinder (1) and located on the other side of the section (3), a top screw threaded hole (5) is provided on the shaft cylinder (1) and located between the two pairs of the second threaded holes (4), a pair of fixing threaded holes (7) are provided at the bottom of the shaft cylinder (1), convex surfaces (6) are provided on both sides of the shaft cylinder (1), and a built-in sleeve (8) is provided inside the shaft cylinder (1).

2. The new horse-drawn head for excavators according to claim 1, characterized in that: The inner sleeve (8) has a friction surface.

3. The new horse-drawn head for excavator according to claim 1, characterized in that: The two pairs of the first threaded holes (2) are respectively connected to the two pairs of the second threaded holes (4).

4. The new horse-drawn head for excavators according to claim 1, characterized in that: The pair of convex surfaces (6) are both annular.

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