Combined connecting piece for shaft connection

Abstract

The utility model relates to the technical field of parts of logistics equipment, in particular to a combined connecting piece used for shaft connection, which comprises an outer connecting section and an inner connecting section, a welding flux table top used for welding is arranged at the junction of the outer connecting section and the inner connecting section, the welding flux table top comprises a positioning end face and a welding flux guide face, and the positioning end face and the welding flux guide face are arranged on the outer connecting section. The positioning end face is perpendicular to the central axis of the inner connecting section, and the welding flux guide face is annularly arranged on the periphery of the positioning end face and inclines towards the direction of the inner connecting section. The connecting piece can be machined through the upsetting technology, cutting machining of drilling is omitted, batch production is facilitated, and the production cost is reduced; according to the connecting piece, the welding flux table top is arranged at the junction of the outer connecting section and the inner connecting section, welding flux can be guided to flow towards the hollow shaft body in the welding process, the welding flux can be fully combined with the hollow shaft body, the welding strength is improved, and the connecting strength of the connecting piece and the hollow shaft body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of logistics equipment parts, in particular to a combined connecting piece for shaft connection. Background Art

[0002] Rollers are the most commonly used components in logistics conveying equipment. They have a support shaft installed inside them, allowing them to rotate relative to the shaft. Traditionally, the support shaft is solid, which increases the weight and cost of the roller.

[0003] The Chinese utility model patent with authorization announcement number CN219030764U discloses a roller using a composite shaft, including a cylinder, a bearing assembly and a drive assembly. The bearing assembly and the drive assembly are movably connected by a composite shaft, and the composite shaft includes short shafts at both ends and a hollow shaft between the short shafts. The roller has a hollow composite shaft inside, which makes the overall structure lighter and lower in cost than traditional single-shaft rollers. However, the short shaft and the hollow shaft are connected by threads. This connection method requires separate thread processing on both, which increases production costs. In addition, the roller is prone to loosening during rapid rotation. Utility Model Content

[0004] The purpose of the utility model is to provide a combined connecting piece for shaft connection, so as to solve the problems raised in the background technology.

[0005] The above-mentioned purpose of the present utility model is achieved through the following technical solutions: a combined connecting piece for shaft connection, comprising an outer connecting section and an inner connecting section, a solder table for welding is provided at the intersection of the outer connecting section and the inner connecting section, the solder table comprises a positioning end face and a solder guide surface, the positioning end face is perpendicular to the central axis of the inner connecting section, the solder guide surface is arranged around the outer periphery of the positioning end face and the solder guide surface is inclined toward the inner connecting section.

[0006] Preferably, the diameter of the inner connecting section is smaller than the diameter of the outer connecting section, and the solder mesa is located at one end of the outer connecting section close to the inner connecting section.

[0007] Preferably, the diameter of the inner connecting section is 3 / 4-4 / 5 of the diameter of the outer connecting section.

[0008] Preferably, the length of the inner connecting section is smaller than that of the outer connecting section, and the length of the inner connecting section is 1 / 5-2 / 5 of the length of the outer connecting section.

[0009] Preferably, one end of the inner connecting section away from the outer connecting section is provided with a chamfer.

[0010] Preferably, an external connection structure is provided at one end of the external connection section away from the internal connection section.

[0011] Preferably, the external connection structure is an internal threaded hole, an external threaded column, or a flat tenon.

[0012] Preferably, it further comprises a hollow shaft body welded to the outer connecting section, the inner connecting section is inserted into the hollow shaft body, and the end face of the hollow shaft body abuts against and is welded to the solder table.

[0013] Preferably, the wall thickness of the hollow shaft body is greater than the radial width of the positioning end face, the connection between the positioning end face and the solder guide surface is located on the inner side of the radial direction of the outer wall of the hollow shaft body, and the outer wall and end face of the hollow shaft body and the solder guide surface are all covered with solder.

[0014] Beneficial effects of the utility model:

[0015] 1. The connector of the utility model can be processed by upsetting technology, eliminating the need for drilling and cutting, facilitating mass production and reducing production costs;

[0016] 2. By setting a solder table at the intersection of the outer connecting section and the inner connecting section, the solder can be guided to flow toward the hollow shaft during the welding process, so that the solder can be fully combined with the hollow shaft, thereby improving the welding strength and the connection strength between the connector and the hollow shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of the connecting member in Example 1 of the present utility model;

[0018] Figure 2 is a cross-sectional view of the connecting member in Example 1 of the present utility model;

[0019] Figure 3 This is a schematic diagram of the connection between the connecting piece and the hollow shaft in Example 1 of the present utility model;

[0020] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle;

[0021] Figure 5 This is a schematic structural diagram of the connecting member in Example 2 of the present utility model;

[0022] Figure 6 This is a schematic structural diagram of the connecting member in Example 3 of the present utility model;

[0023] In the figure: 1-connecting piece, 101-external connecting section, 102-internal connecting section, 103-solder table, 1031-positioning end surface, 1032-solder guide surface, 104-chamfer, 105-inner threaded hole, 106-external threaded column, 107-flat tenon, 2-hollow shaft body, 3-solder. DETAILED DESCRIPTION

[0024] The present invention will be described in further detail below with reference to the accompanying drawings.

[0025] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

[0026] Example 1:

[0027] like Figure 1 and Figure 2 As shown, a modular connector for shaft connection includes an outer connecting section 101 and an inner connecting section 102, wherein both the outer connecting section 101 and the inner connecting section 102 are cylindrical, and the diameter d of the inner connecting section 102 is smaller than the diameter D of the outer connecting section 101, and the diameter d of the inner connecting section 102 is 3 / 4-4 / 5 of the diameter D of the outer connecting section 101. In this embodiment, the diameter D of the outer connecting section 101 is φ20 mm, and the diameter d of the inner connecting section 102 is φ15 mm.

[0028] The length L2 of the inner connecting section 102 is smaller than the length L1 of the outer connecting section 101, and the length L2 of the inner connecting section 102 is 1 / 5-2 / 5 of the length L1 of the outer connecting section 101. In this embodiment, the length L2 of the inner connecting section 102 is 10 mm, and the length L1 of the outer connecting section 101 is 40 mm.

[0029] A soldering platform 103 for soldering is provided at the intersection of the outer connecting section 101 and the inner connecting section 102 . The soldering platform 103 is located at one end of the outer connecting section 101 close to the inner connecting section 102 .

[0030] The solder table 103 includes a positioning end surface 1031 and a solder guide surface 1032 . The positioning end surface 1031 is perpendicular to the central axis of the inner connecting section 102 . The solder guide surface 1032 is arranged around the outer periphery of the positioning end surface 1031 and is inclined toward the inner connecting section 102 .

[0031] An external connection structure is provided at one end of the external connection section 101 away from the internal connection section 102 . In this embodiment, the external connection structure is an internal threaded hole 105 .

[0032] The connector 1 is entirely processed by upsetting to form an outer connecting section 101 , an inner connecting section 102 , a solder table 103 , a chamfer 104 and a connecting hole. In subsequent processing, the connecting hole is tapped to form an internal threaded hole 105 .

[0033] like Figure 3 and Figure 4 As shown, the combined shaft consists of a connecting member 1 and a hollow shaft body 2. The connecting member 1 is connected to both ends of the hollow shaft body 2. The hollow shaft body 2 is welded to the outer connecting section 101 of the connecting member 1. The end face of the hollow shaft body 2 rests on the solder table 103 and is welded to the solder table 103.

[0034] The inner connecting section 102 is inserted into the hollow shaft body 2 . An end of the inner connecting section 102 away from the outer connecting section 101 is provided with a chamfer 104 to facilitate insertion of the inner connecting section 102 into the hollow shaft body 2 .

[0035] In this embodiment, the inner connecting section 102 is connected by interference fit, and the diameter D of the outer connecting section 101 is larger than the diameter of the hollow shaft body 2 .

[0036] The wall thickness t of the hollow shaft body 2 is greater than the radial width h of the positioning end face 1031. The connection between the positioning end face 1031 and the solder guide surface 1032 is located on the inner side of the radial direction of the outer wall of the hollow shaft body 2. The outer end of the solder guide surface 1032 is located on the outer side of the outer wall of the hollow shaft body 2, so that the solder guide surface 1032 and the end of the hollow shaft body 2 form a groove for accommodating the solder 3. The outer wall and end face of the hollow shaft body 2 and the solder guide surface 1032 are all covered with solder 3.

[0037] During the welding process, the welding gun remains stationary and the shaft keeps rotating slowly. The molten solder 3 flows downward along the solder guide surface 1032 into the groove, so that the outer wall and end face of the hollow shaft body 2 can fully contact the solder 3, so that the solder guide surface 1032 of the connector 1 and the outer wall and end face of the hollow shaft body 2 are welded together through the solder 3, increasing the contact area between the solder 3 and the two and improving the welding strength.

[0038] Example 2:

[0039] like Figure 5 As shown, the difference from Example 1 is that the external connection structure is an external threaded column 106.

[0040] Example 3:

[0041] like Figure 6 As shown, the difference from embodiment 1 is that the external connection structure is a flat tenon 107, that is, a flattening operation is performed on both sides of the external connection section 101.

[0042] According to the above embodiment, taking the internal thread M12 core shaft φ20mm and length 1000mm as an example:

[0043] 1. Material cost:

[0044] 1. The weight of a solid mandrel is 2.42 kg, while the weight of a welded mandrel (using a 19×2 mm diameter shaft tube in the middle) is 1.02 kg;

[0045] 2. The mandrel head is processed by piercing technology, and the hole is directly pierced, eliminating the need for drilling and cutting. The material saving is 3.14×5.1 / 1000×5.1 / 1000×30×7.85=0.019Kg, and a total of 0.038Kg is saved at both ends;

[0046] 3. The total material saving is 2.42-1.02+0.038=1.438Kg, and the material saving rate is 1.438 / 2.42×100%=59.4%.

[0047] 2. Manufacturing cycle

[0048] 1. The manufacturing process of a solid mandrel is as follows: round steel cutting - chamfering - drilling - tapping. Since the two ends are symmetrical, chamfering, drilling, and tapping are all done twice. Including the material change time, the round steel cutting takes about 8 seconds, each chamfer takes about 10 seconds, drilling takes about 20 seconds, and tapping takes about 9 seconds. The total time for a single piece is 8 + 2 × (10 + 20 + 9) = 84 seconds.

[0049] 2. Manufacturing process of welding mandrel: round tube cutting - welding. The mandrel head is a standard part of Silver Shaft. The material is prepared in advance. Including the material change time, each welding process takes about 8 seconds to cut the round tube and about 10 seconds to weld. In total, each pipe takes 8 + 2 × 10 = 28 seconds.

[0050] 3. After receiving the order, the manufacturing time of the welded mandrel is about 84-28=56s shorter than that of the solid mandrel, and the time saving rate is about 56 / 84×100%=75%.

[0051] 3. Standardization work

[0052] 1. Whether it is internal or external threads, the mandrel head is made into enterprise standardization and stocked in advance according to needs. Since it is batch processing, the cost will be greatly reduced accordingly.

[0053] 2. In addition, after the implementation of standardization work, the workload of inspection (mainly the total length of the size inspection) will be greatly reduced.

[0054] 4. Application

[0055] This welding mandrel can be used as the shaft core of various non-powered rollers, single / double chain rollers and other powered rollers, and can also be used as the pull rod of equipment.

Claims

1. A modular connector for shaft connection, comprising an outer connecting section (101) and an inner connecting section (102), characterized in that: A solder table (103) for soldering is provided at the intersection of the outer connecting section (101) and the inner connecting section (102), the solder table (103) comprising a positioning end surface (1031) and a solder guide surface (1032), the positioning end surface (1031) being perpendicular to the central axis of the inner connecting section (102), the solder guide surface (1032) being arranged around the outer periphery of the positioning end surface (1031) and being inclined toward the inner connecting section (102).

2. A modular connector for shaft connection according to claim 1, characterized in that: The diameter of the inner connecting section (102) is smaller than the diameter of the outer connecting section (101), and the solder table (103) is located at one end of the outer connecting section (101) close to the inner connecting section (102).

3. The combined connector for shaft connection according to claim 2, characterized in that: The diameter of the inner connecting section (102) is 3 / 4-4 / 5 of the diameter of the outer connecting section (101).

4. The combined connector for shaft connection according to claim 1, characterized in that: The length of the inner connecting section (102) is smaller than the length of the outer connecting section (101), and the length of the inner connecting section (102) is 1 / 5-2 / 5 of the length of the outer connecting section (101).

5. The combined connector for shaft connection according to claim 1, characterized in that: An end of the inner connecting section (102) away from the outer connecting section (101) is provided with a chamfer (104).

6. The combined connector for shaft connection according to claim 1, characterized in that: An external connection structure is provided at one end of the external connection section (101) away from the internal connection section (102).

7. The combined connector for shaft connection according to claim 6, characterized in that: The external connection structure is an internal threaded hole (105) or an external threaded column (106) or a flat tenon (107).

8. The combined connector for shaft connection according to claim 1, characterized in that: It also includes a hollow shaft body (2) welded to the outer connecting section (101), the inner connecting section (102) is inserted into the hollow shaft body (2), and the end face of the hollow shaft body (2) abuts against the solder table (103) and is welded to the solder table (103).

9. The combined connector for shaft connection according to claim 8, characterized in that: The wall thickness of the hollow shaft body (2) is greater than the radial width of the positioning end surface (1031); the connection between the positioning end surface (1031) and the solder guide surface (1032) is located on the inner side of the outer wall of the hollow shaft body (2) in the radial direction; the outer wall and end surface of the hollow shaft body (2) and the solder guide surface (1032) are all covered with solder (3).

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