Transmission shaft for flat head thread rolling machine

Abstract

The utility model provides a transmission shaft for a flat head thread roller, which comprises a hollow cylinder (1), a flange seat (2) arranged at one end of the hollow cylinder, an external thread (3) arranged at the other end of the hollow cylinder (1) and matched with a nut, and a key slot (4) arranged on the outer surface of the middle part of the hollow cylinder (1) and used for transmission, the clamping groove (5) is formed in the area of the external thread (3) and used for fixing a threaded nut in a matched mode; and the step (6) is arranged on the inner side of the flange seat (2) and contracts towards the inner side. The transmission shaft for the flat-end thread rolling machine can finish connection and transmission with an output shaft of a speed reducer and a machine head, prevents the machine head and the transmission shaft from relatively moving in the axial direction, and can be matched with a smoothing cutter bar driven by a motor behind the speed reducer.

Description

Technical Field

[0001] This utility model relates to the field of steel bar processing technology, specifically to a drive shaft for a flat-head thread rolling machine. Background Technology

[0002] The applicant has developed a dual-motor driven flat-end thread rolling machine (see CN202421563337.9). Its core technology involves one motor driving the stripping and thread rolling of the rebar ends, while another motor drives the flattening of the rebar ends, with the two motors connected in series. However, connecting the two drive motors in series with a reducer and the machine head results in a relatively long overall length of the flat-end thread rolling machine, making the core components less compact and causing numerous inconveniences in manufacturing, transportation, and use. Furthermore, the excessively long output shaft (flattening tool holder) of the motor furthest from the machine head increases energy loss due to friction and deflection, leading to low power transmission efficiency. The longer output shaft also increases flexibility and deflection, resulting in torque transmission loss and causing vibration or unstable operation under high loads. It is also more susceptible to external impacts or torque, reducing the risk of damage.

[0003] The applicant further improved the layout of the motor by stacking one motor with another motor or reducer, thus solving the above problems.

[0004] Because the output shaft of the reducer needs to be connected to the machine head via a drive shaft to simultaneously complete the connection and transmission while preventing axial movement, and the machine head performs the peeling and thread rolling of the rebar ends; at the same time, the output shaft (flattening tool holder) of the motor behind the reducer needs to be coaxially aligned with the reducer's output shaft to flatten the rebar ends in the axial direction, and the flattening tool holder of the motor behind the reducer needs to be nested within the drive shaft. Therefore, a drive shaft that meets the above requirements needs to be designed. Utility Model Content

[0005] This utility model provides a drive shaft for a flat-head thread rolling machine, including a hollow cylinder 1, a flange seat 2 disposed at one end of the hollow cylinder 1, an external thread 3 disposed at the other end of the hollow cylinder 1 for cooperating with a nut, a keyway 4 disposed on the outer surface of the middle part of the hollow cylinder 1 for transmission, a retaining groove 5 disposed in the area of ​​the external thread 3 for cooperating and fixing the threaded nut; and a step 6 disposed on the inner side of the flange seat 2 and tapering inward.

[0006] The advantages of this utility model are as follows:

[0007] The structure of the drive shaft enables it to connect and transmit power to the output shaft of the reducer and the machine head, preventing relative axial movement between the machine head and the drive shaft. It can also be matched with the flattening tool bar driven by the motor behind the reducer. Attached Figure Description

[0008] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0009] Figure 1 This is a schematic diagram of the structure of the drive shaft for the flat-head thread rolling machine of this utility model;

[0010] Figure 2 This is a top view schematic diagram of the drive shaft for the flat-head thread rolling machine of this utility model.

[0011] Figure 3 This is a partial assembly drawing of the drive shaft of this utility model in a flat-head thread rolling machine.

[0012] In the diagram: 1. Hollow cylinder; 2. Flange seat; 3. External thread; 4. Keyway; 5. Slot; 6. Step; 7. Head; 8. Reducer; 9. Reducer input shaft; 10. Flattening tool holder. Detailed Implementation

[0013] Example 1

[0014] like Figure 1 and Figure 2 As shown, this embodiment provides a drive shaft for a flat-head thread rolling machine, including a hollow cylinder 1, a flange seat 2 disposed at one end of the hollow cylinder 1, an external thread 3 disposed at the other end of the hollow cylinder 1 for cooperating with a nut, a keyway 4 disposed on the outer surface of the middle part of the hollow cylinder 1 for transmission, a groove 5 disposed in the area of ​​the external thread 3 for cooperating and fixing the threaded nut; and a step 6 disposed on the inner side of the flange seat 2 and tapering inward.

[0015] The structure of the aforementioned drive shaft enables it to connect and transmit power to the output shaft of the reducer 8 and the machine head 7, preventing the machine head 7 and the drive shaft from moving relative to each other in the axial direction. It can also be matched with the flattening cutter bar 10 driven by the motor behind the reducer to flatten the ends of the reinforcing bars.

[0016] Work process: such as Figure 3 As shown, the flange seat 2 of the drive shaft of the flat-head thread rolling machine is connected to the output shaft (not shown) of the reducer 8. A machine head drive component (not shown) is nested on the outside of the hollow cylinder. The machine head drive component transmits torque through the keyway 4 of the hollow cylinder 1 and is used for the machine head 7 to roll and peel the ends of the steel bars.

[0017] The flattening cutter bar 10 driven by the motor behind the reducer passes through the input shaft 9 and the output shaft of the reducer 8, and then passes through the hollow cylinder 1 to flatten the end of the steel bar.

[0018] Several bearings (not shown) are installed at appropriate positions on the outside of the hollow cylinder 1 to support the cylinder, especially one bearing that cooperates with the step 6 to prevent axial movement of the drive shaft;

[0019] The external thread 3 is assembled inside the machine head 7 and fixed to the machine head 7 with a nut to prevent axial movement of the machine head; after assembly, a retaining strip is set at the slot 5 to lock the nut and the thread. In this way, the drive shaft completes the connection and transmission with the output shaft of the reducer 8 and the machine head 7, preventing the machine head 7 and the drive shaft from moving relative to each other in the axial direction. At the same time, it can also match the flattening cutter bar 10 driven by the motor behind the reducer to flatten the end of the steel bar.

Claims

1. A drive shaft for a flat-end thread rolling machine, characterized in that, It includes a hollow cylinder (1), a flange seat (2) provided at one end of the hollow cylinder, an external thread (3) provided at the other end of the hollow cylinder (1) for cooperating with a nut, a keyway (4) provided on the outer surface of the middle part of the hollow cylinder (1) for transmission, a slot (5) provided in the area of ​​the external thread (3) for cooperating and fixing the threaded nut; and a step (6) provided inside the flange seat (2) and tapering inward.

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