Fastening connection structure of direct-connected air compressor motor

Abstract

A secure connection structure for a motor of a direct-connect air compressor. A cylindrical motor housing (1) is provided with a slot-shaped hole (4) at an end close to a pump head main bearing seat (2), and a handle clip (5) that fits a bearing strength of the slot-shaped hole (4) is additionally arranged. A first threaded hole (5a) or / and first through hole (5b) is provided on the handle clip (5); a second threaded hole or / and second through hole (2a) is provided on the pump head main bearing (2). A secure bolt (3) passes through the second through hole (2a) and is then connected to the first threaded hole (5a), or passes through the first through hole (5b) and is then connected to the second threaded hole, or passes through the second through hole (2a) and the first through hole (5b) and is then connected to a nut (6), thereby securing the cylindrical motor housing (1) to the pump head main bearing seat (2). Since the secure bolt (3) is greatly shortened, on one hand, the torsional rigidity of the secure bolt (3) is enhanced, and the quality of connection between a motor and a pump head is improved; on the other hand, bolt materials are saved and the bolt assembling difficulty is reduced, such that production costs of a compressor are reduced.

Description

technical field [0001] The invention belongs to the technical field of compressors, and relates to a fastening connection structure of an air compressor motor, in particular to a direct-coupled air compressor that uses a motor to directly drive the pump head of the compressor to operate, and relates to the connection between the motor and the pump head body Structures that are tightly connected to each other. Background technique [0002] The direct-coupled air compressor is a large-volume and wide-ranging electromechanical product, which is widely used in decoration, medical care, electronic packaging and food packaging and other industries. As the name implies, the direct-coupled air compressor is an air compressor whose motor is directly connected to drive the pump head of the compressor. Due to the direct drive method, the speed of the direct-coupled compressor is relatively high; therefore, the speed of this type of compressor Compared with those indirect compressors (...

AI Technical Summary

Problems solved by technology

[0003] Obviously, there are some deficiencies in the traditional motor fastening structure of direct-coupled air compressors, which are mainly manifested in: 1) The fastening component form of long bolts makes it difficult to guarantee the fastening quality of the motor, because the fastening bolts used are long The diameter ratio usually reaches more than 20 to 1, which belongs to the typical ultra-long thin rod structure, so that the torsional stiffness of the bolt is difficult to bear a larger tightening moment, so the tightening force of the fastening bolt is often small; as we all know, direct coupling The speed of the air compressor is very high, and its vibration frequency is much higher than that of other types of reciprocating compressors. In addition, the motor of the direct-coupled compressor is often supported by a cantilever structure with one end free and the other end fastened (at least for output This is the layout of the largest single-cylinder air compressor), and the small tightening torque can easily cause the failure of the bolt fastening and eventually lead to the loosening of the motor. In other words, the structure of the long bolt fastening motor has poor fastening quality

2) The use of long bolts as a fastening component increases the production cost of the compressor. Firstly, longer bolts will inevitably increase the material cost of the bolts, and secondly, longer bolts will inevitably increase the production cost: on the one hand, long bolts are not easy to fix during installation. Accurate installation holes, especially when the motor is provided with an outer shell and is positioned by the outer shell and the main bearing seat of the pump head, the long bolts often pass through the shell of the motor and match with the threaded holes of the main bearing seat of the pump head , the tightening action at this time is a blind-sight operation mode, and it is not difficult to imagine that the difficulty in positioning is high, resulting in a decrease in production efficiency and an increase in labor costs; on the other hand, the weight and volume of long bolts will inevitably increase, thus More transportation costs and storage costs are derived. These costs not only occur in the production process, but also in the process of packing freight, especially in export freight. Although the increase in the above costs is insignificant for a single compressor product, But note that direct-coupled air compressors are usually mass-produced products, and the effect of accumulating sand will highlight the considerable additional cost

Images