Cantilever type shaft mounting structure

Abstract

The utility model discloses a cantilever type shaft mounting structure which comprises a rack, a connected piece, a cushion block, a connecting shaft, a taper sleeve, a fixing bolt, a knuckle bearing, a gland and a gland bolt, the rack is provided with a mounting inner hole, and the connected piece is provided with a mounting through hole; the connecting shaft is axially provided with a connecting shaft through hole, the front part of the connecting shaft is provided with a conical head, the rear part of the connecting shaft is provided with a connecting rod, and the rear end part of the connecting shaft is provided with a shaft threaded hole; the cushion block and the taper sleeve are installed in the installation inner hole, the conical head is installed in the taper sleeve inner hole, the knuckle bearing is installed in the installation through hole, the connecting rod is arranged on the knuckle bearing in a sleeved mode, the front end of the fixing bolt penetrates through the connecting shaft through hole to be connected to the cushion block threaded hole, and the gland bolt penetrates through the gland through hole of the gland to be connected to the shaft threaded hole. The clearance compensation device is convenient to disassemble and assemble, and the clearance generated by abrasion can be compensated by adjusting the tightening torque of the fixing bolt.

Description

Technical Field

[0001] The utility model belongs to the technical field of mining dump trucks, and in particular relates to a cantilever shaft mounting structure. Background Art

[0002] Mining vehicles are important transportation equipment for open-pit mining. Cantilever shafts are often used to install components such as lifting cylinders, steering cylinders, suspension cylinders, and carriages. One end of the cantilever shaft is installed on the frame, and the other end is used to install the cylinder body or other components.

[0003] There are two ways to connect the cantilever shaft in the existing technical solution:

[0004] 1. One end of the cantilever shaft is directly installed on the frame by interference fit, and the rotation and axial displacement of the shaft are limited by the interference force. The disadvantage of this connection method is that the installation and disassembly of the shaft is inconvenient, and the parts need to be frozen or heated.

[0005] 2. Another method is to install one end of the cantilever shaft on the frame by using a clearance fit, and then connect it to the frame with a bolt through the center hole of the shaft to limit the rotation and axial displacement of the shaft. The disadvantage of this connection method is that due to the gap between the shaft and the hole, the gap between the shaft and the hole will become larger and larger under the action of load during use, affecting the reliability and service life of the parts installation. Utility Model Content

[0006] The utility model aims to overcome the shortcomings of the prior art and provide a cantilever shaft installation structure, which is convenient for assembly and disassembly and can compensate for the gap caused by wear by adjusting the tightening torque of the fixing bolts.

[0007] The technical solution is as follows:

[0008] A cantilever shaft mounting structure comprises: a frame, a connected part, a cushion block, a connecting shaft, a tapered sleeve, a fixing bolt, a spherical bearing, a pressure cover, and a pressure cover bolt. The frame is provided with a mounting inner hole, a retaining ring is provided in the mounting inner hole, the retaining ring divides the mounting inner hole into a first chamber and a second chamber, and the connected part is provided with a mounting through hole; the cushion block is provided with a cushion block threaded hole, the outer wall surface of the tapered sleeve is provided with an open groove, the middle part is provided with a tapered sleeve inner hole, and the tapered sleeve inner hole is a tapered hole; the connecting shaft is axially provided with a connecting shaft through hole, a tapered head is provided at the front, a connecting rod is provided at the rear, and a shaft threaded hole is provided at the rear end; the pressure cover is located on the side of the spherical bearing, and the pressure cover is provided with a pressure cover through hole; the cushion block is installed in the first chamber, the tapered sleeve is installed in the second chamber, the tapered head is installed in the tapered sleeve inner hole, the spherical bearing is installed in the mounting through hole, the connecting rod is sleeved on the spherical bearing, the front end of the fixing bolt passes through the connecting shaft through hole and is connected to the cushion block threaded hole, and the pressure cover bolt passes through the pressure cover through hole and is connected to the shaft threaded hole.

[0009] Furthermore, the connecting shaft through hole axially penetrates the connecting shaft, the mounting inner hole and the cushion block are cylindrical, the outer shape of the tapered sleeve is cylindrical, the open groove axially penetrates the outer wall of the tapered sleeve, and the inner wall surface of the inner hole of the tapered sleeve is a conical arc surface.

[0010] Furthermore, the joint bearing includes: a bearing sleeve, an annular sleeve, and a ball head. The annular sleeve is installed in the bearing sleeve, the annular sleeve is provided with a spherical inner cavity, the ball head is a spherical structure, installed in the spherical inner cavity, and the ball head is provided with a ball head inner hole; the connecting rod is sleeved on the ball head inner hole of the joint bearing, and the pressure cover is pressed on the side of the ball head.

[0011] Further, the outer diameter of the conical head is greater than the outer diameter of the connecting rod.

[0012] Compared with the prior art, the utility model has the following technical effects:

[0013] The cantilever shaft installation structure of the utility model has the structural advantage of convenient disassembly and assembly, and no heating or freezing of parts is required during the disassembly and assembly process.

[0014] The utility model compensates for the gap caused by wear by adjusting the tightening torque of the fixing bolt, thereby improving the use safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the cantilever shaft installation structure in the utility model;

[0016] Figure 2 It is a structural schematic diagram of the connecting shaft in the utility model;

[0017] Figure 3 It is a structural schematic diagram of the cone sleeve in the utility model;

[0018] Figure 4 It is a right view of the cone sleeve in the utility model. DETAILED DESCRIPTION

[0019] The technical solution of the utility model is described in detail below with reference to the example implementation. However, the example implementation can be implemented in various forms and should not be understood as being limited to the implementations described herein; on the contrary, these implementations are provided to make the utility model more comprehensive and complete, and to fully convey the concept of the example implementation to those skilled in the art.

[0020] like Figure 1 The figure is a schematic diagram of the overall structure of the cantilever shaft installation structure in the utility model.

[0021] The cantilever shaft mounting structure is connected between a frame 1 and a connected component 2, and includes a cushion block 3, a connecting shaft 4, a taper sleeve 5, a fixing bolt 6, a spherical bearing 7, a gland 8, and a gland bolt 9.

[0022] The frame 1 is provided with an installation inner hole (cylindrical), and a retaining ring 11 is provided in the middle of the installation inner hole. The retaining ring 11 divides the installation inner hole into a first chamber 12 and a second chamber.

[0023] The connected member 2 is provided with a mounting through hole.

[0024] The cushion block 3 is cylindrical, with a cushion block threaded hole provided in the middle, and the cushion block 3 is installed in the first chamber 12 .

[0025] like Figure 2 , which is a schematic structural diagram of the connecting shaft 4 in the present invention.

[0026] The connecting shaft 4 is a stepped structure, with a connecting shaft through hole 43 provided in the axial direction, a conical head 41 provided at the front, a connecting rod 42 provided at the rear, and a shaft threaded hole 44 provided at the rear end.

[0027] The outer diameter of the conical head 41 is greater than the outer diameter of the connecting rod 42 .

[0028] like Figure 3 As shown, it is a schematic diagram of the structure of the cone sleeve 5 in the utility model. Figure 4 Shown is a right view of the cone sleeve 5 in the utility model.

[0029] The cone sleeve 5 is cylindrical in shape, with an open groove 52 on the outer wall. The open groove 52 axially penetrates the outer wall of the cone sleeve 5, and a cone sleeve inner hole 51 is provided in the middle. The cone sleeve inner hole 51 is a tapered hole, and the inner wall surface is a tapered arc surface.

[0030] The joint bearing 7 comprises: a bearing outer sleeve, an annular sleeve, and a ball head. The annular sleeve is installed in the bearing outer sleeve, the annular sleeve is provided with a spherical inner cavity, the ball head is a spherical structure, installed in the spherical inner cavity, and the ball head is provided with a ball head inner hole.

[0031] The gland 8 is provided with a gland through hole, and the gland bolt 9 is installed on the gland through hole. The gland 8 and the gland bolt 9 function to limit the axial displacement of the spherical bearing 7.

[0032] The pad 3 is installed in the first chamber 12, the tapered sleeve 5 is installed in the second chamber, the tapered head 41 is installed in the inner hole 51 of the tapered sleeve, the spherical bearing 7 is installed in the mounting through hole of the connected part 2, and the connecting rod 42 is sleeved on the inner hole of the ball head of the spherical bearing 7; the front end of the fixing bolt 6 passes through the connecting shaft through hole 43 and is connected to the threaded hole of the pad; the pressure cover 8 is pressed on the ball head of the spherical bearing 7, and the pressure cover bolt 9 passes through the pressure cover through hole and is connected to the shaft threaded hole 44.

[0033] The method of using the cantilever shaft installation structure is as follows:

[0034] Step 1: The cantilever shaft mounting structure is connected between the frame 1 and the connected component 2;

[0035] Install the cushion block 3 in the first chamber 12 of the frame 1, install the cone sleeve 5 in the second chamber, and fit the end faces of the cushion block 3 and the cone sleeve 5 onto the retaining ring 11;

[0036] Install the conical head 41 of the connecting shaft 4 into the inner hole 51 of the conical sleeve 5, and connect the front end of the fixing bolt 6 to the threaded hole of the cushion block 3 through the connecting shaft through hole 43, and tighten the fixing bolt 6 according to the specified torque;

[0037] The spherical bearing 7 is installed to the installation through hole of the connected component 2, the pressure cover 8 is pressed on the ball head of the spherical bearing 7, and the pressure cover bolt 9 passes through the pressure cover through hole and is connected to the shaft threaded hole 44.

[0038] Step 2: During use, the load borne by the connected component 2 is transferred to the connecting shaft 4 through the spherical bearing 7.

[0039] As the use time increases, a gap will be generated due to wear of the tapered sleeve inner hole 51 of the tapered sleeve 5 and the tapered head 41 of the connecting shaft 4. The purpose of compensating the gap can be achieved by removing the gland 8 and the gland bolts 9 and re-adjusting the tightening torque of the fixing bolts 6.

[0040] The terms used in the present invention are illustrative and exemplary, rather than restrictive. Since the present invention can be implemented in various forms without departing from the spirit or essence of the present invention, it should be understood that the above embodiments are not limited to any of the aforementioned details, but should be widely interpreted within the spirit and scope defined by the attached claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the attached claims.

Claims

1. A cantilever shaft mounting structure, characterized in that: include: A frame, a connected part, a pad, a connecting shaft, a tapered sleeve, a fixing bolt, a spherical bearing, a pressure cover, and a pressure cover bolt. The frame is provided with an installation inner hole, and a retaining ring is provided in the installation inner hole. The retaining ring divides the installation inner hole into a first chamber and a second chamber. The connected part is provided with a mounting through hole; the pad is provided with a pad threaded hole, the outer wall of the tapered sleeve is provided with an open groove, the middle is provided with a tapered sleeve inner hole, and the tapered sleeve inner hole is a tapered hole; the connecting shaft is axially provided with a connecting shaft through hole, a tapered head is provided at the front, a connecting rod is provided at the rear, and a shaft threaded hole is provided at the rear end; the pressure cover is located on the side of the spherical bearing, and the pressure cover is provided with a pressure cover through hole; the pad is installed in the first chamber, the tapered sleeve is installed in the second chamber, the tapered head is installed in the tapered sleeve inner hole, the spherical bearing is installed in the installation through hole, the connecting rod is sleeved on the spherical bearing, the front end of the fixing bolt passes through the connecting shaft through hole and is connected to the pad threaded hole, and the pressure cover bolt passes through the pressure cover through hole and is connected to the shaft threaded hole.

2. The cantilever shaft mounting structure according to claim 1, characterized in that: The connecting shaft through hole axially penetrates the connecting shaft, the mounting inner hole and the cushion block are cylindrical, the outer shape of the tapered sleeve is cylindrical, the open groove axially penetrates the outer wall of the tapered sleeve, and the inner wall surface of the inner hole of the tapered sleeve is a conical arc surface.

3. The cantilever shaft mounting structure according to claim 1, characterized in that: The joint bearing includes: a bearing outer sleeve, an annular sleeve, and a ball head. The annular sleeve is installed in the bearing outer sleeve, the annular sleeve is provided with a spherical inner cavity, the ball head is a spherical structure, installed in the spherical inner cavity, and the ball head is provided with a ball head inner hole; the connecting rod is sleeved on the ball head inner hole of the joint bearing, and the pressure cover is pressed on the side of the ball head.

4. The cantilever shaft mounting structure according to claim 1, characterized in that: The outer diameter of the conical head is larger than the outer diameter of the connecting rod.

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