Main shaft coupling

Abstract

The utility model provides a main shaft coupling, which relates to the technical field of couplings, and comprises a coupling main body and coupling columns, the number of the coupling columns is four, the coupling columns are uniformly distributed at one end of the coupling main body in the circumferential direction, and four groups of screw through holes are formed in the two ends of the coupling main body in a penetrating manner. Four groups of dynamic balance holes are uniformly distributed in the coupling main body along the circumferential direction of the edge of the coupling column end, each group of dynamic balance holes are positioned between the adjacent coupling columns, and a tail end flange is integrally arranged at the other end of the coupling main body; an expansion sleeve type inner and outer ring structure of the coupler is omitted, expansion sleeve fastening is changed into screw direct fastening, and the structure and the machining process are simpler; the coupling precision is directly controlled by the end face precision and the aperture matching size, repeated adjustment testing through a fastening screw is not needed any more, and the coupling precision can be debugged by directly tightening the fastening screw with slight force and lightly knocking the fastening screw with a copper rod.

Description

Technical Field

[0001] The utility model relates to the technical field of couplings, in particular to a main shaft coupling. Background Art

[0002] The coupling is a commonly used shaft connection element, mainly used in occasions of transmitting torque and compensating the relative displacement between two shafts; the traditional machine tool spindle coupling adopts the expansion sleeve fastening method, which consists of two parts: the inner ring of the coupling and the outer ring of the coupling. The inner ring of the coupling cooperates with the tail end of the shaft core, and the conical surfaces between the inner and outer rings cooperate and are locked by screws; the fastening screws are screwed from the inner ring of the coupling to the outer ring of the coupling. When the outer ring of the coupling is tightened (tightened by screws), it will apply pressure to the inner ring of the coupling. This pressure will cause the inner hole of the inner ring of the coupling to shrink within a certain range, so that it is tightly sleeved on the tail end of the shaft core. Tighten the fastening screws with standard torque to ensure that the coupling is firmly installed.

[0003] The current spindle coupling has the following defects:

[0004] 1. The installation accuracy of the machine tool spindle coupling is mainly determined by the outer circle runout of the coupling column. During the installation process of the coupling with the traditional expansion sleeve fastening structure, the outer circle runout of the coupling column will continue to change due to the shrinkage and deformation of the inner hole of the coupling. It is necessary to adjust and test repeatedly, which is time-consuming and laborious.

[0005] 2. The coupling of the traditional expansion sleeve structure needs to reserve a disassembly screw hole on the inner ring. The screws are used to apply a sufficient force on the end face of the outer ring of the coupling to separate it from the conical surface of the inner ring of the coupling. There is a risk of the screws breaking during the disassembly process, and the conical surfaces of the inner and outer rings of the coupling after installation and disassembly will inevitably wear out, which makes the re-installation and commissioning of the coupling more difficult, and also affects the maintenance and parts replacement of the machine tool spindle during actual use;

[0006] 3. The dynamic balancing hole of the coupling with the traditional expansion sleeve structure is located on the outer circle of the outer ring of the coupling. When the machine tool spindle rotates at high speed, noise may be generated. At the same time, there is a risk of the dynamic balancing screw or the silencer screw coming off, which poses a certain safety hazard. Utility Model Content

[0007] The purpose of the utility model is to provide a main shaft coupling to solve the above-mentioned deficiencies in the technology.

[0008] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions:.

[0009] A main shaft coupling comprises a coupling body and a coupling column, wherein four coupling columns are provided and are evenly distributed circumferentially at one end of the coupling body, screw holes are provided through both ends of the coupling body, there are four groups of screw holes, each group has several holes and are evenly distributed circumferentially between adjacent coupling columns, the coupling body has dynamic balancing holes evenly distributed circumferentially along the edge of the coupling column end, and there are four groups of dynamic balancing holes, each group has several holes and are evenly distributed circumferentially between adjacent coupling columns, and the other end of the coupling body is integrally provided with a tail end flange.

[0010] Furthermore, the coupling column cooperates with the plum blossom elastic block and the motor end coupling.

[0011] Furthermore, the screw through hole is used to pass a fastening screw, and the fastening screw passes in a direction from the coupling column end to the tail flange end and is connected to the shaft core.

[0012] Furthermore, the interior of the dynamic balancing hole is used for threaded connection of a dynamic balancing screw.

[0013] Furthermore, the outer circle of the tail end flange is matingly connected with the inner hole of the tail end of the shaft core.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1) The inner and outer ring structures of the coupling expansion sleeve are cancelled, and the expansion sleeve fastening is changed to direct screw fastening, which makes the structure and processing technology simpler;

[0016] The coupling accuracy is directly controlled by the end face accuracy and the hole diameter matching size. It is no longer necessary to repeatedly adjust and test the fastening screws. The coupling accuracy can be debugged by simply tightening the fastening screws slightly and tapping them lightly with a copper rod.

[0017] 2) When disassembling the coupling, you only need to remove the fastening screws to complete the disassembly of the coupling, making the maintenance and fault diagnosis of the main shaft more convenient. At the same time, it also avoids equipment damage or parts loss due to the difficulty of disassembling the coupling.

[0018] 3) The dynamic balancing holes of the coupling are changed from uniform distribution on the outer circle to uniform distribution on the end surface, which reduces the noise of the spindle when it rotates at high speed, and also reduces the risk of the dynamic balancing screw or silencer screw coming off and injuring people. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the coupling column end state of a main shaft coupling provided by the utility model;

[0020] Figure 2 A schematic diagram of the second state of a coupling column end of a main shaft coupling provided by the utility model;

[0021] Figure 3A anatomical diagram of a coupling body connecting a shaft core of a main shaft coupling provided by the utility model;

[0022] Figure 4 The utility model provides a coupling body anatomical diagram of a main shaft coupling.

[0023] Legend: 1. Coupling body; 2. Coupling column; 3. Screw hole; 31. Fastening screw; 4. Dynamic balancing hole; 41. Dynamic balancing screw; 5. Tail end flange. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0025] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant literature, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0026] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0028] Example 1

[0029] like Figure 1-4As shown, the utility model provides a technical solution: a main shaft coupling, comprising a coupling body 1 and a coupling column 2, four coupling columns 2 are provided and are circumferentially evenly distributed at one end of the coupling body 1, screw holes 3 are opened through both ends of the coupling body 1, there are four groups of screw holes 3, each group has several holes and are circumferentially evenly distributed between adjacent coupling columns 2, the coupling body 1 has dynamic balancing holes 4 circumferentially evenly distributed along the end edge of the coupling column 2, and there are four groups of dynamic balancing holes 4, each group has several holes and are located between adjacent coupling columns 2, and the other end of the coupling body 1 is integrally provided with a tail end flange 5.

[0030] Example 2

[0031] like Figure 1-4 As shown, the coupling column 2 is used in conjunction with the plum blossom elastic block and the motor end coupling to achieve the transmission of torque and motion.

[0032] The screw through hole 3 is used to pass a fastening screw 31 , and the fastening screw 31 passes in a direction from the end of the coupling column 2 to the end of the tail flange 5 , so that the coupling body 1 is connected to the tail end of the shaft core.

[0033] The inside of the dynamic balancing hole 4 is used for threading a dynamic balancing screw 41 for adjusting the imbalance of the spindle.

[0034] The outer circle of the tail end flange 5 is matingly connected with the inner hole of the tail end of the shaft core.

[0035] Among them, the five factors including the end face accuracy of the shaft core tail end, the inner hole accuracy of the shaft core tail end, the lower end face accuracy of the coupling, the outer circle accuracy of the bottom flange of the coupling, and the fitting tolerance between the outer circle of the bottom flange and the inner hole of the shaft core tail end have a decisive influence on the installation accuracy of the coupling. Among them, the part accuracy can be controlled by processing, and the fitting tolerance can be controlled by selection, which greatly reduces the difficulty of installation accuracy debugging of the coupling.

[0036] Installation and removal steps of this coupling:

[0037] ① Clean the coupling body 1 and the tail end of the shaft core to ensure that there is no debris;

[0038] ② Use a flat-blade screwdriver to lock the dynamic balancing screws 41 into the dynamic balancing holes 4 in sequence;

[0039] ③ Install the tail end flange 5 of the coupling body 1 into the tail end of the shaft core, align it with the hole position, and lock the fastening screw 31, and tighten the fastening screw 31 with a small torque;

[0040] ④ Use a lever micrometer to measure the outer circle runout of the four coupling columns 2, and gently tap the outer circle of the coupling with a copper rod until the outer circle runout of the coupling column 2 reaches the required standard range, and then tighten the fixing screws 31 with standard torque;

[0041] ⑥ Use a lever micrometer to re-measure the outer circle runout of the four coupling columns 2 and the end face runout of the coupling body 1. If the runout is within the standard range, it means that the coupling is successfully debugged;

[0042] ⑦ Remove the fastening screws 31 to remove the coupling body 1.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A main shaft coupling, comprising a coupling body (1) and a coupling column (2), wherein four coupling columns (2) are provided and are evenly distributed in the circumferential direction at one end of the coupling body (1), characterized in that: Screw holes (3) are provided through both ends of the coupling body (1). There are four groups of screw holes (3), each group has several holes and is evenly distributed circumferentially between adjacent coupling columns (2). The coupling body (1) has dynamic balancing holes (4) evenly distributed circumferentially along the end edge of the coupling column (2). There are four groups of dynamic balancing holes (4), each group has several holes and is located between adjacent coupling columns (2). The other end of the coupling body (1) is integrally provided with a tail end flange (5).

2. A main shaft coupling according to claim 1, characterized in that: The coupling column (2) cooperates with the plum blossom elastic block and the motor end coupling.

3. A main shaft coupling according to claim 1, characterized in that: The screw through hole (3) is used to pass a fastening screw (31), and the fastening screw (31) passes from the end of the coupling column (2) to the end of the tail flange (5) and is connected to the shaft core.

4. A main shaft coupling according to claim 1, characterized in that: The interior of the dynamic balancing hole (4) is used for threaded connection with a dynamic balancing screw (41).

5. A main shaft coupling according to claim 1, characterized in that: The outer circle of the tail end flange (5) is matingly connected with the inner hole of the tail end of the shaft core.

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