Long-life belt pulley for main shaft of pipe threading lathe
By using a high-strength alloy steel matrix, ultra-hard wear-resistant coating and structural optimization design on the spindle pulley of the pipe thread lathe, the problem of wear and fracture of the traditional pulley is solved, long life and efficient power transmission are achieved, and the stability and precision of the equipment are improved.
Patent Information
- Application Number
- CN202422840778.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-11-21
AI Technical Summary
The spindle pulley of traditional pipe threading lathes is prone to wear and breakage under long-term high-load operation, causing the belt to slip and fall off, affecting processing accuracy and production efficiency.
It adopts a high-strength alloy steel base, ultra-hard wear-resistant coating, reinforcing ribs, balance correction holes, heat dissipation holes and tapered expansion sleeve design, combined with V-shaped belt groove and fastening bolts to improve friction and wear resistance, ensure shape stability and heat dissipation, and adjust the balance state through dynamic balance test.
It extends the service life of the pulleys, improves the reliability and stability of the equipment, and ensures processing accuracy and production efficiency.
Smart Images
Figure CN223447593U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to mechanical processing equipment technical field, concretely is long life belt pulley for pipe thread lathe main shaft. BACKGROUND
[0002] Pipe thread lathe is a horizontal lathe specially designed for turning machining of large-diameter pipe fittings, which adopts pressure hobbing cutting method, that is, a pressure in the outer diameter direction is applied on the pipe, and the position contacted with the turning tool will be deformed, thereby generating cutting effect. This lathe can automatically complete the feeding, rotation and cutting of the pipe. Machining pipe thread: pipe thread lathe is mainly used for machining the thread of pipe fittings (such as drill pipe, drill collar, kelly, casing, etc.), which can turn cylindrical and conical pipe threads of metric and imperial system.
[0003] In addition, it can also undertake turning of external circle, boring, turning of internal and external conical surface and plane of ordinary lathe. Pipe thread lathe is widely used in mechanical machining operation of mechanical manufacturing, petroleum, chemical industry, coal, geological exploration, urban water supply and drainage and other industries. Especially in the repair of steel pipes in the oil pipe station, pipe thread lathe plays an important role.
[0004] However, in the actual use of the prior art, in the pipe thread lathe, the main shaft pulley is one of the key components for driving the rotation of the main shaft, which is connected with the motor through the belt to transmit power to realize the rotation of the main shaft. However, the traditional belt pulley is prone to wear, fracture and other problems under long-time high-load operation due to limitations in material, structure design or manufacturing process, which leads to belt slip, falling off, even damage to the main shaft, and seriously affects the machining accuracy and production efficiency of the lathe. UTILITY MODEL CONTENTS
[0005] The utility model discloses a long life belt pulley for pipe thread lathe main shaft, to solve the problem of the pipe thread lathe in the background art, the main shaft pulley is one of the key components for driving the rotation of the main shaft, which is connected with the motor through the belt to transmit power to realize the rotation of the main shaft. However, the traditional belt pulley is prone to wear, fracture and other problems under long-time high-load operation due to limitations in material, structure design or manufacturing process, which leads to belt slip, falling off, even damage to the main shaft, and seriously affects the machining accuracy and production efficiency of the lathe.
[0006] To achieve the above object, the utility model provides the following technical scheme: including the belt pulley main part, the superhard wear -resisting coating is added to the outer surface of belt pulley main part,
[0007] The reinforcing ribs are fixedly arranged at both sides of the outer end of the pulley body, balance correction holes and heat dissipation holes are respectively arranged at the outer sides of both ends of the middle part of the pulley body, balance screws are threadedly connected to the inner walls of the balance correction holes, a transmission groove is formed through the middle part of the pulley body, a belt groove is formed at the outer end of the pulley body for transmission with the belt, a conical expansion sleeve for transmission with the transmission groove and the external transmission shaft is movably connected to the inner wall of the transmission groove, and fastening bolts for expanding the conical expansion sleeve are threadedly connected to the front end of the conical expansion sleeve.
[0008] Preferably, the pulley body is made of high-strength, high-wear-resistant and high-toughness alloy steel as the base body, so that the pulley body achieves the ideal balance of hardness and toughness.
[0009] Preferably, the super-hard wear-resistant coating is made of silicon carbide or silicon nitride, so that the friction coefficient and wear resistance between the belt and the pulley body are improved through the super-hard wear-resistant coating.
[0010] Preferably, the number of reinforcing ribs is several, which are symmetrically distributed in sequence at both sides of the outer end of the pulley body, so that the pulley body remains stable in shape and prevents deformation under high tension through the reinforcing ribs.
[0011] Preferably, the number of balance correction holes and heat dissipation holes is several, which are symmetrically distributed in sequence at the outer sides of both ends of the middle part of the pulley body, and the inner walls of the balance correction holes are provided with internal threads.
[0012] Preferably, the number of balance screws is several, which are adapted to different weights, and the inner side of the belt groove is designed in a V shape.
[0013] Preferably, the number of fastening bolts is several, which are symmetrically distributed in sequence at the front end of the conical expansion sleeve.
[0014] Compared with the prior art, the pulley body has the advantages that:
[0015] 1、The super-hard wear-resistant coating improves the friction coefficient and wear resistance between the belt and the pulley body, the reinforcing ribs ensure that the pulley body remains stable in shape and prevents deformation under high tension, the heat dissipation holes dissipate heat, avoid the pulley body from deforming due to overheating during long-time operation, and when the pulley body is detected by a dynamic balance test equipment during maintenance and is found to be unbalanced, balance screws are added or removed in the corresponding balance correction holes according to the detection results, so that the pulley body reaches a balanced state, the V-shaped design of the inner side of the belt groove increases the contact area between the belt and the belt groove, improves the friction force, and reduces the edge wear of the belt, thereby prolonging the service life of the pulley body and improving the reliability and stability of the equipment.
[0016] 2、 The utility model discloses still when the pulley main part is installed, through the fastening bolt of tightening, when fastening bolt is tightened, the conical expansion sleeve will produce the expansion force between the external transmission shaft and transmission groove, through this expansion effect, the conical expansion sleeve and the external transmission shaft and with transmission groove form the close interference fit, produce enough friction to transmit torque and radial force, thereby realize the installation between the pulley main part and the external transmission shaft conveniently. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is the whole structure schematic diagram of long life pulley for pipe thread lathe spindle of the utility model Figure One ;
[0018] Figure 2 It is the whole structure schematic diagram of long life pulley for pipe thread lathe spindle of the utility model Figure Two ;
[0019] Figure 3 It is the whole structure schematic diagram of long life pulley for pipe thread lathe spindle of the utility model Figure Three .
[0020] In the drawing: 1, pulley main part;2, reinforcing rib;3, balance correction hole;4, heat dissipation hole;5, balance screw;6, transmission groove;7, belt groove;8, conical expansion sleeve;9, fastening bolt. DETAILED DESCRIPTION
[0021] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the scope of the utility model.
[0022] Please refer to Figures 1-3 The utility model provides long life pulley technical scheme for pipe thread lathe spindle: including pulley main part 1, pulley main part 1 adopts high strength, high wear resistance and high toughness alloy steel as base body, makes pulley main part 1 reach ideal hardness and toughness balance, to adapt long time high load operation, the outer surface of pulley main part 1 is applied with superhard wear-resistant coating, and the superhard wear-resistant coating is made of silicon carbide or silicon nitride, so that the friction coefficient and wear resistance between the belt and pulley main part 1 are improved through the superhard wear-resistant coating;
[0023] The reinforcing ribs 2 are fixedly installed on both sides of the outer end of the belt pulley body 1, and the number of reinforcing ribs 2 is several, which are symmetrically distributed in sequence on both sides of the outer end of the belt pulley body 1, so that the shape of the belt pulley body 1 remains stable and deformation is prevented under high tension through the reinforcing ribs 2, balance correction holes 3 and heat dissipation holes 4 are respectively formed on the outer sides of both ends of the middle part of the belt pulley body 1, and the number of balance correction holes 3 and heat dissipation holes 4 is several, which are symmetrically distributed in sequence on the outer sides of both ends of the middle part of the belt pulley body 1, the inner wall of the balance correction hole 3 is provided with internal threads, and the balance correction hole 3 is threadedly connected with a balance screw 5, and the number of balance screws 5 is several, and is adapted to different weights, a transmission groove 6 is formed through the middle part of the belt pulley body 1, so that the belt pulley body 1 is driven to rotate through the transmission groove 6 and an external transmission shaft, a belt groove 7 for transmitting with a belt is formed on the outer end of the belt pulley body 1, and the inner side of the belt groove 7 is designed in a V shape, so that the contact area between the belt and the belt groove 7 is increased through the V-shaped design of the inner side of the belt groove 7, the friction force is improved, and the edge wear of the belt is reduced, and a conical expansion sleeve 8 for transmitting with the transmission groove 6 and the external transmission shaft is movably connected to the inner wall of the transmission groove 6, and the conical expansion sleeve 8 is a conical fitting part composed of a sleeve and a cone, the sleeve is an inner conical surface, and the cone is an outer conical surface, and the front end of the conical expansion sleeve 8 is threadedly connected with a fastening bolt 9 for expanding the conical expansion sleeve 8, and the number of fastening bolts 9 is several, which are symmetrically distributed in sequence on the front end of the conical expansion sleeve 8.
[0024] Working principle: in use, the belt pulley body 1 of the utility model adopts high-strength, high-wear-resistant and high-toughness alloy steel as the base body, so that the belt pulley body 1 achieves ideal hardness and toughness balance to adapt to long-time high-load operation, the friction coefficient and wear resistance between the belt and the belt pulley body 1 are improved through the super-hard wear-resistant coating, the shape of the belt pulley body 1 remains stable and deformation is prevented under high tension through the reinforcing ribs 2, heat dissipation is performed through the heat dissipation holes 4 to avoid the situation that the belt pulley body 1 is deformed due to overheating during long-time operation, and when the belt pulley body 1 is detected by a dynamic balance testing device during maintenance that the belt pulley body 1 is in an unbalanced state, the balance screw 5 is added or removed in the corresponding balance correction hole 3 according to the detection result, so that the belt pulley body 1 reaches a balanced state, the contact area between the belt and the belt groove 7 is increased through the V-shaped design of the inner side of the belt groove 7, the friction force is improved, and the edge wear of the belt is reduced, so as to realize the service life of the belt pulley body 1 and improve the reliability and stability of the equipment.
[0025] At the same time, when the pulley body 1 is installed, the fastening bolt 9 is tightened, the conical expansion sleeve 8 generates expansion force between the external drive shaft and the transmission groove 6 when the fastening bolt 9 is tightened, and through the expansion effect, the conical expansion sleeve 8 and the external drive shaft and the transmission groove 6 form a close interference fit, generate sufficient friction to transmit torque and radial force, so as to realize the installation between the pulley body 1 and the external drive shaft.
[0026] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.
[0027] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. Long-life pulley for spindle of pipe thread lathe, characterized by: It comprises a pulley body (1), wherein the outer surface of the pulley body (1) is applied with a super-hard wear-resistant coating; Reinforcing ribs (2) are fixedly installed on both sides of the outer ends of the pulley body (1), and balance correction holes (3) and heat dissipation holes (4) are respectively opened on the outer sides of the two ends of the middle part of the pulley body (1), and the inner wall of the balance correction hole (3) is threadedly connected with a balance screw (5), and a transmission groove (6) is opened through the middle part of the pulley body (1), and a belt groove (7) for transmitting with a belt is opened at the outer end of the pulley body (1), and the inner wall of the transmission groove (6) is movably connected with a conical expansion sleeve (8) for cooperating with the transmission groove (6) and the external transmission shaft for transmission, and the front end of the conical expansion sleeve (8) is threadedly connected with a fastening bolt (9) for tightening the conical expansion sleeve (8).
2. The long-life pulley for the main shaft of a pipe thread lathe according to claim 1, characterized in that: The pulley body (1) uses high-strength, high-wear-resistant and high-toughness alloy steel as a matrix, so that the pulley body (1) achieves an ideal balance between hardness and toughness.
3. The long-life pulley for the main shaft of a pipe thread lathe according to claim 2, characterized in that: The super-hard wear-resistant coating is made of silicon carbide or silicon nitride, so that the friction coefficient and wear resistance between the belt and the pulley body (1) are improved by the super-hard wear-resistant coating.
4. The long-life pulley for the main shaft of a pipe thread lathe according to claim 3, characterized in that: There are several reinforcing ribs (2), which are symmetrically distributed on both sides of the outer end of the pulley body (1), so that the reinforcing ribs (2) ensure that the pulley body (1) can maintain a stable shape and prevent deformation under high tension.
5. The long-life pulley for the main shaft of a pipe thread lathe according to claim 4, characterized in that: There are a number of the balance correction holes (3) and the heat dissipation holes (4), which are symmetrically distributed on the outer sides of the middle and two ends of the pulley body (1). The inner wall of the balance correction hole (3) is provided with an internal thread.
6. The long-life pulley for the main shaft of a pipe thread lathe according to claim 5, characterized in that: There are several balancing screws (5) adapted to different weights, and the inner side of the belt groove (7) is designed in a V shape.
7. The long-life pulley for the main shaft of a pipe thread lathe according to claim 6, characterized in that: There are several fastening bolts (9), which are symmetrically distributed in sequence around the front end of the conical expansion sleeve (8).