Differential type core rod

Abstract

The differential type core rod comprises a core rod body, one end of the core rod body is fixedly connected with a drill bit, the other end of the core rod body is fixedly connected with a connecting cylinder, the outer surface of the core rod body is sleeved with a supporting base, a driving cylinder is inserted into the connecting cylinder, and a mounting groove is formed in the outer surface of the driving cylinder; a friction plate is slidably connected into the mounting groove, the surface of one side of the friction plate is connected to the inner side face of the connecting cylinder in an abutting mode, a guide rod is connected to the other side of the friction plate, a wedge-shaped block is connected to one end of the guide rod, and the wedge-shaped block is slidably mounted on one side of the interior of the driving cylinder; jacking springs are installed at the two ends of the surface of one side of the wedge-shaped block, the connecting position of the driving cylinder can adjust the jacking force, differential adjustment can be achieved while driving control is guaranteed, slipping buffering is conducted after limitation is exceeded, impact is avoided, safety and stability are improved, and production and use are facilitated.

Description

Technical Field

[0001] The present invention relates to the field of mandrels, and more particularly to differential mandrels. Background Art

[0002] In the rolling process of steel pipes, a mandrel is required to facilitate the drilling of the steel billet.

[0003] The mandrel structure used in steel rolling is mostly a simple round rod structure, which is not conducive to guide support during drive control, and is prone to drooping and bending in local positions, causing local swings and affecting the smoothness of rotation. In addition, the drive connection type cannot be adjusted in differential combination, which easily causes interference and has poor safety and stability. It is yet to be proposed a differential mandrel structure. Summary of the invention

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide a differential core rod, which connects the drill bit and the connecting tube through the core rod body, so as to install the support seat and the driving tube. It can be installed in a separate assembly and can provide auxiliary support in the middle position to avoid sagging. At the same time, it can slide and contract to avoid interference. The connection position of the driving tube can adjust the tightening force, ensure drive control and differential adjustment at the same time. After exceeding the limit, it can perform slippage buffering to avoid impact, improve safety and stability, and facilitate production use.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] The differential mandrel comprises a mandrel body, one end of the mandrel body is fixedly connected to a drill bit, the other end of the mandrel body is fixedly connected to a connecting tube, the outer surface of the mandrel body is sleeved with a support seat, and the interior of the connecting tube is plugged with a driving tube;

[0007] The outer surface of the driving cylinder is provided with a mounting groove, the interior of the mounting groove is slidably connected with a friction plate, and one side surface of the friction plate is tightly connected to the inner side surface of the connecting cylinder;

[0008] The other side of the friction plate is connected to a guide rod, one end of the guide rod is connected to a wedge block, the wedge block is slidably mounted on one side of the inner side of the driving cylinder, and two ends of one side surface of the wedge block are mounted with tension springs;

[0009] A bearing is installed inside the support seat, and the bearing is sleeved on the surface of the core rod body. A compression spring is fixedly installed on one side of the support seat, and the compression spring is sleeved on the outer surface of the core rod body.

[0010] Furthermore, there are at least three support seats, which are evenly connected to the outer surface of the core rod body at equal intervals.

[0011] Furthermore, a connecting groove is provided on the outer surface of the support seat, and a movable roller is rotatably installed inside the connecting groove. The movable rollers are symmetrically distributed on the outer surface of the support seat. The movable rollers are installed through the connecting groove and can slide and contract laterally to avoid interference with the core rod body, which is beneficial to auxiliary support.

[0012] Furthermore, an electric telescopic rod is fixedly installed inside the driving cylinder, and a rod head of the electric telescopic rod is connected to a pushing block.

[0013] Furthermore, the pushing block is slidably installed inside the driving cylinder, and the outer surface of the pushing block is tightly connected to the inclined surface of the wedge block. The pushing block is installed by an electric telescopic rod, and the wedge block can be pushed to adjust the tightening force, which facilitates differential control and is safe and stable.

[0014] Furthermore, both ends of one side of the electric telescopic rod are fixedly connected with a threading tube, and one end of the threading tube is located on the outer surface of the driving cylinder.

[0015] Furthermore, a fixing ring is sleeved on one end of the driving cylinder, and conductive rings are fixedly connected to both ends of the fixing ring.

[0016] Furthermore, a conductive block is slidably mounted on the inner surface of the conductive ring. The conductive block is mounted on one end of the threading tube through an electric wire and is connected to both ends of the electric telescopic rod.

[0017] Furthermore, a power-carrying wire is provided on the other side of the conductive ring, and the power-carrying wire is fixedly connected to the outer surface of the fixed ring. The conductive ring is divided into positive and negative poles. The conductive block is installed through a wire threading tube, and the conductive ring is installed in combination with the fixed ring. The contact can be rotated to control the power supply, avoid interference, and facilitate combined use.

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] (1) This solution connects the drill bit and the connecting tube through the core rod body, thereby installing the support seat and the driving tube. They can be installed in a split assembly and can provide auxiliary support in the middle position to prevent sagging. At the same time, they can slide and shrink to avoid interference. The connection position of the driving tube can adjust the tightening force to ensure drive control while allowing differential adjustment. When the limit is exceeded, slippage and buffering are performed to avoid impact, thereby improving safety and stability and facilitating production use.

[0020] (2) The movable roller is installed through the connecting groove, which can slide and shrink laterally to avoid interference with the core rod body and facilitate auxiliary support.

[0021] (3) By installing the push block through the electric telescopic rod, the wedge block can be pushed to adjust the tightening force, which is convenient for differential control and safe and stable.

[0022] (4) The conductive block is installed through the threading tube, and the conductive ring is installed in combination with the fixing ring. The contact can be rotated to control the power supply, avoid interference, and facilitate combined use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a partial schematic diagram of the connection of the support seat of the present invention;

[0025] Figure 3 A side cross-sectional view of the drive cylinder connection of the present invention;

[0026] Figure 4 For the present invention Figure 3 Enlarged view of point A where the middle friction block is connected;

[0027] Figure 5 It is a partial schematic diagram of the fixing ring connection of the present invention.

[0028] Description of the numbers in the figure:

[0029] 1 core rod body, 11 drill bit, 12 support seat, 13 connecting cylinder, 14 driving cylinder, 15 installation groove, 16 friction plate, 17 guide rod, 18 wedge block, 19 tightening spring, 2 electric telescopic rod, 21 push block, 22 bearing, 23 compression spring, 24 connecting groove, 25 moving roller, 26 threading tube, 3 fixing ring, 31 conductive ring, 32 conductive block, 33 conducting wire. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0031] Example 1

[0032] See also Figure 1 , Figure 2 and Figure 3 , a differential mandrel, comprising a mandrel body 1, one end of the mandrel body 1 is fixedly connected to a drill bit 11, the other end of the mandrel body 1 is fixedly connected to a connecting tube 13, the outer surface of the mandrel body 1 is sleeved with a support seat 12, and the interior of the connecting tube 13 is plugged with a driving tube 14;

[0033] The outer surface of the driving cylinder 14 is provided with a mounting groove 15, and a friction plate 16 is slidably connected inside the mounting groove 15, and one side surface of the friction plate 16 is tightly connected to the inner side surface of the connecting cylinder 13;

[0034] The other side of the friction plate 16 is connected to a guide rod 17, one end of the guide rod 17 is connected to a wedge block 18, the wedge block 18 is slidably mounted on one side of the inner side of the driving cylinder 14, and the two ends of one side surface of the wedge block 18 are mounted with a tightening spring 19;

[0035] A bearing 22 is installed inside the support seat 12 , and the bearing 22 is sleeved on the surface of the core rod body 1 . A compression spring 23 is fixedly installed on one side of the support seat 12 , and the compression spring 23 is sleeved on the outer surface of the core rod body 1 .

[0036] There are at least three support seats 12, which are evenly connected to the outer surface of the core rod body 1 at equal intervals. The outer surface of the support seat 12 is provided with a connecting groove 24, and a movable roller 25 is rotatably installed inside the connecting groove 24. The movable rollers 25 are symmetrically distributed on the outer surface of the support seat 12. The movable rollers are installed through the connecting grooves, which can slide and shrink laterally to avoid interference with the core rod body, which is beneficial to auxiliary support.

[0037] Example 1

[0038] See also Figure 1 , Figure 3 and Figure 4 , a differential mandrel, comprising a mandrel body 1, one end of the mandrel body 1 is fixedly connected to a drill bit 11, the other end of the mandrel body 1 is fixedly connected to a connecting tube 13, the outer surface of the mandrel body 1 is sleeved with a support seat 12, and the interior of the connecting tube 13 is plugged with a driving tube 14;

[0039] The outer surface of the driving cylinder 14 is provided with a mounting groove 15, and a friction plate 16 is slidably connected inside the mounting groove 15, and one side surface of the friction plate 16 is tightly connected to the inner side surface of the connecting cylinder 13;

[0040] The other side of the friction plate 16 is connected to a guide rod 17, one end of the guide rod 17 is connected to a wedge block 18, the wedge block 18 is slidably mounted on one side of the inner side of the driving cylinder 14, and the two ends of one side surface of the wedge block 18 are mounted with a tightening spring 19;

[0041] A bearing 22 is installed inside the support seat 12 , and the bearing 22 is sleeved on the surface of the core rod body 1 . A compression spring 23 is fixedly installed on one side of the support seat 12 , and the compression spring 23 is sleeved on the outer surface of the core rod body 1 .

[0042] An electric telescopic rod 2 is fixedly installed inside the driving cylinder 14, and a push block 21 is connected to the rod head of the electric telescopic rod 2. The push block 21 is slidably installed inside the driving cylinder 14, and the outer surface of the push block 21 is tightly connected to the inclined surface of the wedge block 18. By installing the push block on the electric telescopic rod, the wedge block can be pushed to adjust the tightening force, which facilitates differential control and is safe and stable.

[0043] Example 3

[0044] See also Figure 1 , Figure 3 and Figure 5 , a differential mandrel, comprising a mandrel body 1, one end of the mandrel body 1 is fixedly connected to a drill bit 11, the other end of the mandrel body 1 is fixedly connected to a connecting tube 13, the outer surface of the mandrel body 1 is sleeved with a support seat 12, and the interior of the connecting tube 13 is plugged with a driving tube 14;

[0045] The outer surface of the driving cylinder 14 is provided with a mounting groove 15, and a friction plate 16 is slidably connected inside the mounting groove 15, and one side surface of the friction plate 16 is tightly connected to the inner side surface of the connecting cylinder 13;

[0046] The other side of the friction plate 16 is connected to a guide rod 17, one end of the guide rod 17 is connected to a wedge block 18, the wedge block 18 is slidably mounted on one side of the inner side of the driving cylinder 14, and the two ends of one side surface of the wedge block 18 are mounted with a tightening spring 19;

[0047] A bearing 22 is installed inside the support seat 12 , and the bearing 22 is sleeved on the surface of the core rod body 1 . A compression spring 23 is fixedly installed on one side of the support seat 12 , and the compression spring 23 is sleeved on the outer surface of the core rod body 1 .

[0048] A threading tube 26 is fixedly connected to both ends of one side of the electric telescopic rod 2. One end of the threading tube 26 is located on the outer surface of the driving cylinder 14. A fixing ring 3 is sleeved on one end of the driving cylinder 14. A conductive ring 31 is fixedly connected to both ends of the inside of the fixing ring 3. A conductive block 32 is slidably installed on the inner surface of the conductive ring 31. The conductive block 32 is installed on one end of the threading tube 26 through an electric wire and is connected to both ends of the electric telescopic rod 2. A conducting wire 33 is provided on the other side of the conductive ring 31. The conducting wire 33 is fixedly connected to the outer surface of the fixing ring 3. The conductive ring 31 is divided into positive and negative poles. The conductive block is installed through the threading tube and the conductive ring is installed in combination with the fixing ring. The contact can be rotated to control the power supply, avoid interference, and facilitate combined use.

[0049] When in use, the other end of the driving cylinder 14 is installed to the shaft end of the rotating motor, and they can be installed in combination. In this way, the friction plate 16 presses the inner surface of the connecting cylinder 13, and the connecting cylinder 13 and the core rod body 1 can be rotated. At the same time, the support seat 12 is combined with auxiliary support to ensure the stability of rotation. The drill bit 11 can be aligned with the end position of the billet for drilling and rolling. As the drill bit 11 and the core rod body 1 penetrate into the interior of the billet, the end position pushes the support seat 12 back to slide axially, thereby pressing the compression spring 23 for compression and contraction, which can be avoided and will not interfere with the deep drilling. It is safe and stable. At the same time, during the rotation of the driving cylinder 14, the threading tube 26 is brought to the conductive block 32 to fit the conductive ring 31 for rotation. Without interfering with each other, the power-on control is guaranteed. The extended length of the electric telescopic rod 2 can be controlled in combination with the switch, so that the pushing block 21 can be combined with the wedge block 18 to tighten the force of the friction plate 16, thereby ensuring sufficient friction to drive the connecting tube 13 to rotate. When the resistance to the rotation of the core rod body 1 is too large, the friction force of the friction plate 16 can be overcome, and the connecting tube 13 and the driving tube 14 will slip against each other. In this way, they will be separated after exceeding the limit, thereby improving the driving safety. In this way, the tightening force can be adjusted by controlling the extended length of the electric telescopic rod 2, so as to adjust the driving force according to different needs, thereby realizing differential adjustment control, which is accurate and efficient, safe and stable, and has high adaptability.

[0050] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A differential mandrel, comprising a mandrel body (1), one end of the mandrel body (1) being fixedly connected to a drill bit (11), and the other end of the mandrel body (1) being fixedly connected to a connecting tube (13), characterized in that: The outer surface of the mandrel body (1) is sleeved with a support seat (12), and the interior of the connecting tube (13) is plugged with a driving tube (14); The outer surface of the driving cylinder (14) is provided with a mounting groove (15), the interior of the mounting groove (15) is slidably connected with a friction plate (16), and one side surface of the friction plate (16) is tightly connected to the inner side surface of the connecting cylinder (13); The other side of the friction plate (16) is connected to a guide rod (17), one end of the guide rod (17) is connected to a wedge block (18), the wedge block (18) is slidably mounted on one side of the inner side of the driving cylinder (14), and two ends of one side surface of the wedge block (18) are mounted with tension springs (19); A bearing (22) is installed inside the support seat (12), and the bearing (22) is sleeved on the surface of the core rod body (1). A compression spring (23) is fixedly installed on one side of the support seat (12), and the compression spring (23) is sleeved on the outer surface of the core rod body (1).

2. The differential mandrel according to claim 1, characterized in that: There are at least three support seats (12), which are evenly connected to the outer surface of the core rod body (1) at equal intervals.

3. The differential mandrel according to claim 1, characterized in that: The outer surface of the support seat (12) is provided with a connecting groove (24), and a moving roller (25) is rotatably installed inside the connecting groove (24), and the moving rollers (25) are symmetrically distributed on the outer surface of the support seat (12).

4. The differential mandrel according to claim 1, characterized in that: An electric telescopic rod (2) is fixedly installed inside the driving cylinder (14), and a rod head of the electric telescopic rod (2) is connected to a pushing block (21).

5. The differential mandrel according to claim 4, characterized in that: The pushing block (21) is slidably mounted inside the driving cylinder (14), and the outer surface of the pushing block (21) is tightly connected to the inclined surface of the wedge block (18).

6. The differential mandrel according to claim 4, characterized in that: A wire threading tube (26) is fixedly connected to both ends of one side of the electric telescopic rod (2), and one end of the wire threading tube (26) is located on the outer surface of the driving cylinder (14).

7. The differential mandrel according to claim 1, characterized in that: One end of the driving cylinder (14) is sleeved with a fixing ring (3), and both ends of the fixing ring (3) are fixedly connected with conductive rings (31).

8. The differential mandrel according to claim 7, characterized in that: A conductive block (32) is slidably mounted on the inner surface of the conductive ring (31); the conductive block (32) is mounted on one end of a wire threading tube (26) via an electric wire and is connected to both ends of the electric telescopic rod (2).

9. The differential mandrel according to claim 7, characterized in that: A conducting wire (33) is provided on the other side of the conductive ring (31); the conducting wire (33) is fixedly connected to the outer surface of the fixed ring (3); and the conductive ring (31) is divided into positive and negative poles.

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