CN113983078A - An all-metal coupling that can be used in tight spaces - Google Patents

Abstract

The invention discloses an all-metal coupling capable of being used in a narrow space, which comprises a connecting piece, a sliding piece in a square structure and a clearance fit structure capable of compensating installation deviation between shafts, wherein the connecting piece consists of a connecting shaft and a connecting base plate, two shaft ends of the connecting shaft are respectively connected with a driving shaft and the front side of the connecting base plate, the clearance fit structure consists of clamping grooves formed in four corner regions of the sliding piece, two first convex blocks symmetrically arranged on the back side of the connecting base plate and two second convex blocks symmetrically arranged on the end surface of the driven shaft facing the driving shaft, the two clamping grooves on each diagonal line of the sliding piece are symmetrical, the two first convex blocks are embedded into the two symmetrical clamping grooves, the two second convex blocks are embedded into the other two symmetrical clamping grooves, and the first convex blocks are in clearance fit with the corresponding clamping grooves and the second convex blocks are in clearance fit with the corresponding clamping grooves; the connecting device has the advantages that the connecting device can be applied to an axial narrow space, has long service life and low maintenance cost, and can connect a driving shaft and a driven shaft with large axial difference.

Description

All-metal coupling capable of being used in narrow space

Technical Field

The invention relates to a coupling, in particular to an all-metal coupling which can be used in a narrow space.

Background

The coupling is a device for connecting two shafts or a shaft and a rotating part, rotating together in the process of transmitting motion and power and not separating under normal conditions. Sometimes, the coupling is also used as a safety device for preventing the coupled machine parts from bearing overlarge load, plays a role in overload protection, and can be widely applied to transmitting torque in mechanical shafting of lifting, engineering transportation, mines, petroleum, ships, coal, rubber, paper machinery and other heavy machinery industries. The couplings can be divided into high-pressure damping rubber type couplings, diaphragm type couplings, plum blossom type couplings, bellows type couplings, crosshead shoe type couplings, rigid couplings, universal couplings and the like according to different structures.

The large-scale machinery equipment is difficult to realize coaxiality by adjusting two shafts of the driving shaft and the driven shaft, so that a coupler which is long in service life and convenient to replace easily damaged parts is usually installed between the driving shaft and the driven shaft, and the effects of transmitting torque, compensating installation deviation between shafts, absorbing equipment vibration, buffering load impact and the like are achieved. However, the existing non-all-metal coupling has the problems of short service life and sensitivity to high temperature and high pollution environment compared with the all-metal coupling, for example, the quincunx coupling belongs to the non-all-metal coupling, the quincunx coupling comprises a small metal shaft sleeve, a large metal shaft sleeve matched with the small metal shaft sleeve and a non-metal elastomer arranged in a cavity formed after the small metal shaft sleeve and the large metal shaft sleeve are matched, the non-metal elastomer is easily interfered by the working environment (environment influenced by high temperature, chemical industry and the like on non-metal materials), and the service life can be directly influenced. The part of all-metal couplings also have the problem of limited service life, for example, a diaphragm type coupling does not need lubrication and maintenance, so that the economic benefit is improved, the environmental pollution is small, but the fatigue degree of an elastomer formed by a plurality of diaphragms is low, the durability is poor, and the service life can be directly influenced. In addition, the existing couplings have the following problems: 1) the problem of long axial length exists, and in order to facilitate the installation and maintenance of the coupling, the coupling is mainly applied to the machine equipment with enough installation space between a driving shaft and a driven shaft at present, but is difficult to apply in an axial narrow space; 2) the driving shaft and the driven shaft with large difference of the shaft diameters cannot be directly connected.

Disclosure of Invention

The invention aims to solve the technical problem of providing an all-metal coupling capable of being used in a narrow space, which can be applied in an axial narrow space, has long service life and low maintenance cost, can directly connect a driving shaft and a driven shaft with larger axial difference, and can be suitable for some complex working environments with high temperature and high corrosion.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides an all-metal coupling that can use in narrow space, its characterized in that is including the connecting piece that is used for being connected with the actuating shaft of machine equipment, be the gleitbretter of square structure and can compensate the clearance fit structure of installation deviation between the axle, the connecting piece constitute by connecting axle and connection substrate, one of them axle head of connecting axle with drive shaft connection, another axle head of connecting axle with connection substrate's positive fixed connection, clearance fit structure by set up in four draw-in grooves altogether on four angular regions of gleitbretter, symmetry set up in two first lugs on connection substrate's the back, symmetry set up in the passive axle orientation of machine equipment two second lugs on the axle head terminal surface of drive shaft constitute, every diagonal two of gleitbretter draw-in groove symmetry, two first lug embedding one of them diagonal two of gleitbretter draw-in the draw-in groove And the two second convex blocks are embedded into the two clamping grooves on the other diagonal line of the sliding sheet, and the first convex blocks are in clearance fit with the corresponding clamping grooves and the second convex blocks are in clearance fit with the corresponding clamping grooves.

The clamping groove is a rectangular groove with an opening facing the outer part of the sliding sheet, and the first lug and the second lug are rectangular blocks with the same size. The clamping grooves are designed into the rectangular grooves, the first protruding blocks and the second protruding blocks are designed into the rectangular blocks, and the first protruding blocks can be better matched with the corresponding clamping grooves in a clearance fit mode, and the second protruding blocks can be better matched with the corresponding clamping grooves in a clearance fit mode.

After the first lug is embedded into the corresponding clamping groove, the single-side gap between the first lug and the corresponding clamping groove is 4 micrometers, and after the second lug is embedded into the corresponding clamping groove, the single-side gap between the second lug and the corresponding clamping groove is 4 micrometers. In order to enable the sliding sheet to move freely in a radial plane (the radial plane of the driving shaft and the driven shaft), a single-side gap between the first convex block and three corresponding edges (two side edges and a bottom edge of the clamping groove) of the clamping groove is designed to be 4 micrometers, a single-side gap between the second convex block and three corresponding edges of the clamping groove is also designed to be 4 micrometers, and the value of 4 micrometers is an optimal value determined through a large number of experiments.

The connecting substrate is strip-shaped, and the two first lugs are symmetrically arranged on the length direction of the back surface of the connecting substrate. Because the two clamping grooves matched with the two first lugs are positioned on one diagonal line of the sliding sheet, and the matching of the two second lugs and the two corresponding clamping grooves cannot be influenced by the connecting substrate after the two first lugs are matched with the two corresponding clamping grooves, the connecting substrate is designed into a long strip shape, and the strength, the cost and the attractiveness can be simultaneously considered in the actual design process.

The connecting shaft and the driving shaft are connected by adopting a spline or a flat key or adopt other existing connecting structures.

Compared with the prior art, the invention has the advantages that:

1) the slip sheet is of a sheet structure and can be thinned as much as possible under the condition of ensuring the strength, the connecting substrate of the connecting piece is as thin as possible under the condition of ensuring the strength as the slip sheet is, the length of the connecting shaft of the connecting piece can be reliably connected with the driving shaft, and therefore the axial length of the whole all-metal coupling is greatly reduced compared with that of the existing coupling, and the all-metal coupling can be applied to realize power transmission in an axial narrow space.

2) Because the slip sheet, the connecting piece, the first lug and the second lug in the all-metal coupler are all metal pieces, and the connection between the slip sheet and the connecting substrate as well as the connection between the slip sheet and the driven shaft are all rigid connections, the service life of the all-metal coupler is greatly prolonged.

3) The all-metal coupler is simple in structure composition, high in fatigue degree and low in maintenance cost.

4) Because the main stress point of the all-metal coupler is arranged at the first lug and the clamping groove and the second lug and the clamping groove, the diameter of the driven shaft can be selected within a large range as long as the shaft diameter of the driving shaft is unchanged within a light range, so that the all-metal coupler can be directly connected with the driving shaft and the driven shaft which have larger difference in the shaft diameter.

5) The all-metal coupler has two degrees of freedom in a radial plane, and the sliding sheet can move randomly within the range of the gaps between the first protruding blocks and the corresponding clamping grooves and between the second protruding blocks and the corresponding clamping grooves, so that the inter-shaft installation deviation can be well compensated.

6) Because the components of the whole structure are made of metal materials, surface treatment and material selection can be carried out on any component according to the working environment so as to adapt to different working environments, particularly complex working environments such as high temperature, high corrosion and the like.

Drawings

Fig. 1 is a schematic overall perspective view of an all-metal coupling according to the present invention;

FIG. 2 is a schematic overall side view of the all-metal coupling of the present invention;

fig. 3 is an exploded view of the all-metal coupling of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

The invention provides an all-metal coupling capable of being used in a narrow space, which comprises a connecting piece 1 used for being connected with a driving shaft (not shown in the figure, such as an output shaft of a motor) of machine equipment, a sliding piece 2 in a square structure and a clearance fit structure 3 capable of compensating installation deviation between shafts, wherein the connecting piece 1 consists of a connecting shaft 11 and a connecting base plate 12, one shaft end of the connecting shaft 11 is connected with the driving shaft, the other shaft end of the connecting shaft 11 is fixedly connected with the front surface of the connecting base plate 12, the clearance fit structure 3 consists of four clamping grooves 31 which are arranged on four corner regions of the sliding piece 2, two first convex blocks 32 which are symmetrically arranged on the back surface of the connecting base plate 12 and two second convex blocks 33 which are symmetrically arranged on the end surface of a driven shaft 9 of the machine equipment, which faces to the shaft end, and two clamping grooves 31 on each diagonal line of the sliding piece 2 are symmetrical, the two first bumps 32 are embedded into the two slots 31 on one diagonal of the slide 2, the two second bumps 33 are embedded into the two slots 31 on the other diagonal of the slide 2, and the first bumps 32 and the corresponding slots 31 and the second bumps 33 and the corresponding slots 31 are in clearance fit.

In the present embodiment, the slot 31 is a rectangular slot with an opening facing the outside of the slider 2, and the first protrusion 32 and the second protrusion 33 are rectangular blocks with the same size. The card slot 31 is designed to be a rectangular slot, and the first projection 32 and the second projection 33 are designed to be rectangular blocks, so that the clearance fit between the first projection 32 and the corresponding card slot 31 and the clearance fit between the second projection 33 and the corresponding card slot 31 can be better ensured.

In this embodiment, after the first bump 32 is inserted into the corresponding card slot 31, a single-side gap between the first bump 32 and the corresponding card slot 31 is 4 micrometers, and after the second bump 33 is inserted into the corresponding card slot 31, a single-side gap between the second bump 33 and the corresponding card slot 31 is 4 micrometers. In order to enable the sliding sheet 2 to move freely in a radial plane (a radial plane of the driving shaft and the driven shaft 9), single-side gaps between the first protruding blocks 32 and three corresponding edges of the clamping grooves 31 (two side edges and bottom edges of the clamping grooves 31) are designed to be 4 micrometers, single-side gaps between the second protruding blocks 33 and three corresponding edges of the clamping grooves 31 are designed to be 4 micrometers, and the value of 4 micrometers is an optimal value determined through a large number of experiments.

In the embodiment, the connection substrate 12 is in a strip shape, and the two first bumps 32 are symmetrically disposed in the length direction of the back surface of the connection substrate 12. Because the two card slots 31 matched with the two first bumps 32 are located on one diagonal line of the sliding piece 2, and the connection substrate 12 cannot affect the matching of the two second bumps 33 and the two corresponding card slots 31 after the two first bumps 32 are matched with the two corresponding card slots 31, the connection substrate 12 is designed into a long strip shape, and the connection substrate can be designed with strength, cost and beauty taken into consideration in the actual design process, for example, into the shape as shown in the figure.

In the present embodiment, the connecting shaft 11 and the driving shaft are connected by a spline or a flat key, or by other connecting structures.

Claims (5)

1. An all-metal coupling that can be used in a narrow space, characterized in that it includes a connecting piece for connecting with a drive shaft of a machine, a sliding vane in a square structure, and a clearance fit that can compensate for the installation deviation between the shafts structure, the connecting piece is composed of a connecting shaft and a connecting substrate, one of the shaft ends of the connecting shaft is connected with the driving shaft, and the other shaft end of the connecting shaft is connected with the connecting substrate. The front side is fixedly connected, and the clearance fit structure consists of a total of four card slots opened on the four corner areas of the slide plate, two first bumps symmetrically arranged on the back side of the connection substrate, It is composed of two second projections symmetrically arranged on the shaft end face of the passive shaft of the machine equipment facing the drive shaft, and the two card slots on each diagonal line of the sliding sheet are symmetrical, The two first protrusions are embedded in the two card slots on one of the diagonal lines of the sliding sheet, and the two second protrusions are embedded in the other one of the sliding sheets. In the two card slots on the diagonal line, the first protrusion and the corresponding card groove and the second protrusion and the corresponding card groove are all clearance fit. 2. An all-metal coupling that can be used in a narrow space according to claim 1, characterized in that the card slot is a rectangular slot with an opening facing the outside of the sliding piece, and the first slot is a rectangular slot. A bump and the second bump are rectangular blocks of the same size. 3. An all-metal coupling that can be used in a narrow space according to claim 2, wherein the first protrusion is inserted into the corresponding slot after the first protrusion is inserted into the corresponding groove. The unilateral gap between the block and the corresponding card slot is 4 microns. After the second bump is embedded in the corresponding card slot, the second bump and the corresponding card slot The one-sided gap between the grooves is 4 microns. 4. An all-metal coupling that can be used in a narrow space according to any one of claims 1 to 3, characterized in that the connecting substrate is in the shape of a long strip, and the two first The bumps are symmetrically arranged in the longitudinal direction of the back surface of the connection substrate. 5 . The all-metal coupling according to claim 1 , wherein the connecting shaft and the driving shaft are connected by splines or flat keys. 6 .

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