Driving connection structure of cutter head of tube push bench

Abstract

The utility model discloses a driving connection structure of a cutter head of a tube push bench. The driving connection structure of the pipe push bench cutter head comprises a driving box, the driving box is fixedly connected with a driving main shaft, the side, extending out of the driving box, of the driving main shaft is sequentially sleeved with a sealing seat and a cutter head seat from back to front, the sealing seat is fixedly connected with the driving box, and a cover plate is arranged at the front end of the driving main shaft and prevents the cutter head seat from slipping off from the driving main shaft. An inner spline is arranged on the inner circumferential surface of the cutter head seat, an outer spline matched with the inner spline is arranged on the outer circumferential surface of the driving main shaft, a conical groove is formed in the rear side of the inner circumferential surface of the cutter head seat, and a conical boss matched with the conical groove is arranged on the outer circumferential surface of the driving main shaft. The utility model solves the problems of large assembly difficulty and short service life in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe jacking machines, in particular to a driving connection structure of a cutter head of a pipe jacking machine. Background Art

[0002] At present, in order to ensure the transmission of torque, involute splines are applied to the connection structure of the cutter head of the pipe jacking machine. For example, the Chinese utility model patent with publication number CN215170018U, entitled "A multi-channel spray device for the main shaft water supply of a pipe jacking machine", discloses that the cutter head and the spline sleeve are connected, and the spline sleeve is connected to the main shaft. However, the internal splines of the spline sleeve and the external splines on the main shaft are clearance fit. The direct connection between the two makes the gap difficult to control. In addition, during the construction process, hard objects such as stones are encountered, and the gap between the internal and external splines is uneven due to external forces. In addition, the switching between forward and reverse rotation is frequent, and the internal and external splines are squeezed against each other, causing great damage and a short service life. Utility Model Content

[0003] The purpose of the utility model is to provide a drive connection structure for a pipe jacking machine cutter head that can ensure uniform clearance between inner and outer splines, reduce mutual extrusion damage between inner and outer splines, and prolong service life in response to the deficiencies in the prior art.

[0004] In order to achieve the above purpose, the technical solution adopted by the drive connection structure of the pipe jacking machine cutter head of the utility model is:

[0005] A drive connection structure for a pipe jacking machine cutter disc, including a drive box, a drive spindle fixedly connected to the drive box, a sealing seat and a cutter disc seat sequentially sleeved on one side of the drive spindle extending out of the drive box from the back to the front, the sealing seat being fixed to the drive box, a cover plate being provided at the front end of the drive spindle, the cover plate preventing the cutter disc seat from slipping off the drive spindle, an inner spline being provided on the inner circumference of the cutter disc seat, an outer spline matching the inner spline being provided on the outer circumference of the drive spindle, a conical groove being provided on the rear side of the inner circumference of the cutter disc seat, and a conical boss matching the conical groove being provided on the outer circumference of the drive spindle.

[0006] Preferably, the angle between the side wall and the end face of the conical boss is 93-98°.

[0007] Preferably, the length of the tapered boss is smaller than the depth of the tapered groove.

[0008] Preferably, a wear-resistant ring is provided between the inner circumference of the sealing seat and the outer circumference of the driving main shaft, and the wear-resistant ring is interference-fitted with the driving main shaft.

[0009] Compared with the prior art, the present invention has the following advantages:

[0010] The conical groove and the conical boss cooperate to connect the cutter disc seat to the driving spindle, which ensures precise positioning, convenient control of the gap between the inner and outer splines, and easy assembly. During the construction process, it can also prevent the cutter disc seat from radial displacement under the action of external force, ensure the uniform gap between the inner and outer splines, reduce the wear caused by mutual extrusion between the inner and outer splines, and extend the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the drive connection structure of the cutter head of the pipe jacking machine of the present invention;

[0012] Figure 2 It is a cross-sectional view of the cutterhead seat.

[0013] Among them, 1 drive box, 2 drive spindle, 21 external spline, 22 tapered boss, 3 sealing seat, 4 cutter head seat, 41 internal spline, 42 tapered groove, 5 wear-resistant ring, 6 cover plate. DETAILED DESCRIPTION

[0014] The present invention is further illustrated below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, modifications of various equivalent forms of the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0015] like Figure 1-2 As shown, a drive connection structure of a pipe jacking machine cutter disc includes a drive box 1, a drive box fixedly connected to a drive spindle 2, a side of the drive spindle extending out of the drive box is sequentially sleeved with a sealing seat 3 and a cutter disc seat 4 from back to front, the sealing seat is fixed to the front end of the drive box, a wear-resistant ring 5 is arranged between the inner circumference of the sealing seat and the outer circumference of the drive spindle, the wear-resistant ring and the drive spindle have an interference fit, the wear-resistant ring protects the drive spindle from the wear of the seal in the sealing seat, thereby improving the service life of the drive spindle, and the front end of the drive spindle is passed through the sealing seat. The cover plate 6 is installed by bolts to prevent the cutter disc seat from slipping off the drive spindle. The inner circumference of the cutter disc seat is processed with an internal spline 41, and the outer circumference of the drive spindle is processed with an external spline 21 that cooperates with the internal spline. A conical groove 42 is provided on the rear side of the inner circumference of the cutter disc seat, and a conical boss 22 that cooperates with the conical groove is processed on the outer circumference of the drive spindle. The angle between the side wall and the end face of the conical boss is 95°, and the length of the conical boss is less than the depth of the conical groove, which does not hinder the close fit between the cutter disc seat and the drive spindle.

[0016] The specific working process and principle of the drive connection structure of the cutter disc of a pipe jacking machine: during assembly, the cutter disc seat is directly sleeved on the outside of the conical boss, and as the cover plate is installed, the conical groove and the conical boss are driven to fit more and more tightly, and the positioning of the cutter disc seat is also more and more precise, ensuring that the clearance between the internal and external splines is consistent, and the operation is very convenient; during the construction process, when the cutter disc crushes hard objects or switches forward and reverse, due to the support of the conical boss, the cutter disc seat will not undergo radial displacement, avoiding the phenomenon of mutual squeezing and wear of the internal and external splines, thereby extending the service life of the drive spindle and the cutter disc seat, and ensuring the construction progress.

Claims

1. A drive connection structure for a pipe jacking machine cutterhead, comprising a drive box, a drive spindle fixedly connected to the drive box, a sealing seat and a cutterhead seat being sleeved in sequence from back to front on one side of the drive spindle extending out of the drive box, the sealing seat being fixedly connected to the drive box, a cover plate being provided at the front end of the drive spindle, the cover plate preventing the cutterhead seat from slipping off the drive spindle, an internal spline being provided on the inner circumference of the cutterhead seat, and an external spline being provided on the outer circumference of the drive spindle to cooperate with the internal spline, characterized in that: A conical groove is provided on the rear side of the inner circumference of the cutter disc seat, and a conical boss matched with the conical groove is provided on the outer circumference of the driving spindle.

2. The drive connection structure of the cutter head of the pipe jacking machine according to claim 1, characterized in that: The included angle between the side wall and the end face of the conical boss is 93-98°.

3. The drive connection structure of the cutter head of the pipe jacking machine according to claim 1, characterized in that: The length of the tapered boss is smaller than the depth of the tapered groove.

4. The drive connection structure of the cutter head of the pipe jacking machine according to claim 1, characterized in that: A wear-resistant ring is provided between the inner circumference of the sealing seat and the outer circumference of the driving main shaft, and the wear-resistant ring is interference-fitted with the driving main shaft.

Images