Mandrel capable of being mutually spliced

Abstract

The utility model discloses a mandrel capable of being mutually spliced, which belongs to the field of mandrels and comprises a first mandrel, two connecting pieces and two second mandrels, the two connecting pieces are respectively positioned at two ends of the first mandrel, and the two second mandrels are respectively positioned at two ends, far away from each other, of the two connecting pieces; by arranging a first spline, an inserting groove, a second spline and an inserting block, the two connecting pieces can be clamped to the two ends of the first shaft core through shape matching of the first spline and the second spline and shape matching of the inserting groove and the inserting block, at the moment, a first pin hole, a second pin hole and a third pin hole in the same side can be aligned, and then a taper pin is inserted into the first pin hole, so that the connecting pieces are clamped to the two ends of the first shaft core. The first shaft core and the connecting piece can be fixed together by arranging the first shaft core and the second shaft core, so that the first shaft core and the connecting piece cannot be separated when forward or reverse power is transmitted, and by arranging the fixing screw and the limiting ring, after threaded holes in the connecting piece and the second shaft core are aligned, the fixing screw is screwed into the threaded holes, and the connecting piece and the second shaft core can be fixed together.

Description

Technical Field

[0001] The utility model relates to the technical field related to core shafts, in particular to core shafts that can be spliced ​​with each other. Background Art

[0002] A spliced ​​mandrel is a mandrel that can be spliced ​​together. It is usually composed of multiple identical or different mandrel segments. The advantages of a spliced ​​mandrel are that it can save materials, improve production efficiency and reduce costs. In addition, this spliced ​​mandrel can be used to connect parts to each other, thereby ensuring the normal operation of large equipment.

[0003] Since the spliced ​​mandrel transmits power between parts, the accuracy and stability of the connection must be ensured during connection to avoid problems such as looseness or deformation. However, the multiple sections of some spliced ​​mandrels are connected by threads, which can only transmit power in one direction. After frequent power transmission, the threads are easily worn, affecting the stability of power transmission. Utility Model Content

[0004] In order to solve the defects in the prior art, the utility model provides a core shaft that can be spliced ​​with each other.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] The utility model discloses a core shaft which can be spliced ​​with each other, comprising a first shaft core, two connecting members and two second shaft cores, wherein the two connecting members are respectively located at two ends of the first shaft core, and the two second shaft cores are respectively located at two ends of the two connecting members which are far away from each other, first splines are fixedly connected at the edges of both ends of the first shaft core, slots are provided at the centers of both ends of the first shaft core, second splines which match the corresponding first splines are fixedly connected to the two connecting members, and plug blocks are fixedly connected at the centers of the two connecting members.

[0007] As a preferred technical solution of the utility model, corresponding first pin holes and second pin holes are provided on the first splines at both ends of the first shaft core, and third pin holes corresponding to the positions of the first pin holes and the second pin holes on the same side are provided on the two connecting parts.

[0008] As a preferred technical solution of the utility model, conical pins are inserted between the first pin hole, the second pin hole and the third pin hole on the same side, and the two conical pins on both sides form a cross in the same plane.

[0009] As a preferred technical solution of the utility model, three threaded holes are provided at the connection between the connecting member and the second shaft core on the same side, and a fixing screw is threadedly connected between two corresponding threaded holes on the connecting member and the second shaft core.

[0010] As a preferred technical solution of the utility model, the top of the fixing screw is provided with a cross slot, and the lower end of the fixing screw is rounded.

[0011] As a preferred technical solution of the utility model, an annular groove is provided on the two connecting members, and the three threaded holes on the connecting members are all located in the annular groove.

[0012] As a preferred technical solution of the utility model, a limiting ring is sleeved on each of the annular grooves.

[0013] The beneficial effects of the utility model are:

[0014] 1. This kind of core shaft that can be spliced ​​with each other, by setting a first spline, a slot, a second spline and an insert, utilizing the shape matching of the first spline and the second spline, as well as the shape matching of the slot and the insert, can snap the two connecting parts into place at both ends of the first shaft core. At this time, the first pin hole, the second pin hole and the third pin hole on the same side will be aligned, and then the conical pin will be inserted therein, so that the first shaft core and the connecting part can be fixed together, so that the first shaft core and the connecting part will not be separated when transmitting forward or reverse power.

[0015] 2. This kind of core shaft that can be spliced ​​with each other is provided with fixing screws and limiting rings. When the threaded holes on the connecting piece and the second shaft core are aligned, the fixing screws are screwed into them to fix the connecting piece and the second shaft core together. Since the lower end of the fixing screw has a rounded corner, the force applied can be evenly dispersed to prevent the fixing screw from breaking. Afterwards, the limiting ring is put on the annular groove to prevent the fixing screw from falling off the connecting piece, thereby ensuring the stability of power transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the main structure of a mandrel that can be spliced ​​with each other according to the utility model;

[0018] Figure 2 This is a schematic diagram of the first shaft core structure of a mandrel that can be spliced ​​with each other according to the utility model;

[0019] Figure 3 This is a schematic cross-sectional structure diagram of a connecting piece of a mandrel that can be spliced ​​with each other according to the utility model;

[0020] Figure 4 This is a schematic cross-sectional structure diagram of a second shaft core of a mandrel that can be spliced ​​with each other according to the utility model;

[0021] Figure 5 The utility model is a schematic diagram of a conical pin structure of a core shaft that can be spliced ​​with each other.

[0022] In the figure: 1, first shaft core; 2, connecting piece; 3, second shaft core; 4, first spline; 5, slot; 6, second spline; 7, plug block; 8, first pin hole; 9, second pin hole; 10, third pin hole; 11, tapered pin; 12, threaded hole; 13, fixing screw; 14, annular groove; 15, limit ring. DETAILED DESCRIPTION

[0023] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0024] Example: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the utility model is a core shaft that can be spliced ​​with each other, including a first shaft core 1, two connecting members 2 and two second shaft cores 3, the two connecting members 2 are respectively located at two ends of the first shaft core 1, the two second shaft cores 3 are respectively located at two ends of the two connecting members 2 that are far away from each other, first splines 4 are fixedly connected at the edges of both ends of the first shaft core 1, slots 5 are opened at the centers of both ends of the first shaft core 1, second splines 6 that match the corresponding first splines 4 are fixedly connected to the two connecting members 2, and plug blocks 7 are fixedly connected at the centers of the two connecting members 2.

[0025] Among them, corresponding first pin holes 8 and second pin holes 9 are provided on the first splines 4 at both ends of the first shaft core 1, and third pin holes 10 corresponding to the positions of the first pin holes 8 and the second pin holes 9 on the same side are provided on the two connecting parts 2. By setting the first pin holes 8, the second pin holes 9 and the third pin holes 10, when the first spline 4 and the second spline 6 are stuck together, the first pin holes 8, the second pin holes 9 and the third pin holes 10 on the same side can be aligned.

[0026] Among them, a conical pin 11 is inserted between the first pin hole 8, the second pin hole 9 and the third pin hole 10 on the same side, and the two conical pins 11 on both sides are in a cross shape in the same plane. By setting the conical pin 11, the first shaft core 1 and the two connecting parts 2 at both ends can be fixed together.

[0027] Among them, three threaded holes 12 are opened at the connection between the connecting member 2 and the second shaft core 3 on the same side, and a fixing screw 13 is threadedly connected between two corresponding threaded holes 12 on the connecting member 2 and the second shaft core 3. By setting the threaded holes 12 and the fixing screws 13, the corresponding connecting member 2 and the second shaft core 3 can be fixed together.

[0028] Among them, the top of the fixing screw 13 is provided with a cross groove, and the lower end of the fixing screw 13 is rounded. By setting a cross groove at the top of the fixing screw 13, the disassembly and assembly of the fixing screw 13 can be facilitated, and by rounding the lower end of the fixing screw 13, it can be ensured that the fixing screw 13 is subjected to uniform force.

[0029] Among them, an annular groove 14 is formed on both connecting members 2, and the three threaded holes 12 on the connecting member 2 are all located in the annular groove 14. By providing the annular groove 14, the fixing screws 13 can be hidden to prevent the fixing screws 13 from protruding.

[0030] The annular grooves 14 are all sleeved with limit rings 15 . The limit rings 15 can prevent the fixing screws 13 from falling off the connecting member 2 .

[0031] During operation, the two second shaft cores 3 are welded to the parts on both sides that need to transmit power, and then the connecting piece 2 is put on the corresponding second shaft core 3. After the threaded holes 12 on the connecting piece 2 and the second shaft core 3 are aligned, the fixing screws 13 are screwed into them to fix the connecting piece 2 and the second shaft core 3 together. Since the lower end of the fixing screw 13 has a rounded corner, the force received can be evenly dispersed to prevent the fixing screw 13 from breaking when transmitting power. Then the limiting ring 15 is put on the annular groove 14. The limiting ring 15 will cover the fixing screw 13 in the annular groove 14 to prevent the fixing screw 13 from falling off from the connecting piece 2. Then the first shaft core 1 is clamped between the two connecting pieces 2. Since the first spline 4 and the second spline 3 are fixed together, the fixing screw 13 can be fixed together. By matching the shapes of the two splines 6, as well as the slots 5 and the inserts 7, the relative positions of the two connecting parts 2 and the first shaft core 1 will be fixed, and at this time, the first pin hole 8, the second pin hole 9 and the third pin hole 10 on the same side will be aligned, and then the conical pin 11 will be inserted thereinto, so that the first shaft core 1 and the connecting part 2 can be fixed together, so that the first shaft core 1 and the connecting part 2 will not be separated when transmitting power. Since the first shaft core 1 and the two connecting parts 2 can be disassembled, the distance between the parts on both sides can be adapted by replacing the first shaft core 1 of different lengths, and when disassembling, it is only necessary to remove the conical pins 11 at both ends of the first shaft core 1, and the first shaft core 1 can be removed from between the two connecting parts 2 for replacement.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A mandrel that can be spliced ​​together, characterized in that: The invention comprises a first shaft core (1), two connecting members (2) and two second shaft cores (3), wherein the two connecting members (2) are respectively located at two ends of the first shaft core (1), and the two second shaft cores (3) are respectively located at two ends of the two connecting members (2) which are far away from each other. First splines (4) are fixedly connected at the edges of both ends of the first shaft core (1), slots (5) are provided at the centers of both ends of the first shaft core (1), second splines (6) matching the corresponding first splines (4) are fixedly connected to the two connecting members (2), and plug blocks (7) are fixedly connected at the centers of the two connecting members (2).

2. A mandrel that can be spliced ​​together according to claim 1, characterized in that: The first splines (4) at both ends of the first shaft core (1) are each provided with a corresponding first pin hole (8) and a second pin hole (9), and the two connecting members (2) are each provided with a third pin hole (10) corresponding to the position of the first pin hole (8) and the second pin hole (9) on the same side.

3. A mandrel that can be spliced ​​together according to claim 2, characterized in that: A conical pin (11) is inserted between the first pin hole (8), the second pin hole (9) and the third pin hole (10) on the same side, and the two conical pins (11) on both sides are in the shape of a cross in the same plane.

4. The mandrel that can be spliced ​​together according to claim 1, characterized in that: Three threaded holes (12) are provided at the connection between the connecting member (2) and the second shaft core (3) on the same side, and a fixing screw (13) is threadedly connected between two corresponding threaded holes (12) on the connecting member (2) and the second shaft core (3).

5. A mandrel that can be spliced ​​together according to claim 4, characterized in that: The top ends of the fixing screws (13) are each provided with a cross slot, and the lower ends of the fixing screws (13) are rounded.

6. A mandrel that can be spliced ​​together according to claim 4, characterized in that: An annular groove (14) is provided on each of the two connecting members (2), and the three threaded holes (12) on the connecting members (2) are all located in the annular groove (14).

7. A mandrel that can be spliced ​​together according to claim 6, characterized in that: The annular grooves (14) are sleeved with limit rings (15).

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