CN209430630U - A kind of overload coupling of low torque permanent torque - Google Patents

Abstract

The utility model relates to a kind of overload couplings of low torque permanent torque, including the drive plate with motor shaft synchronous revolving, with the transmission shift plate of output shaft synchronous revolution, it is characterized by: being equipped with intermediate transmission disk between the drive plate and transmission shift plate, the intermediate transmission disk is pulled pin by bulb and is flexibly connected with transmission shift plate；It is radially evenly distributed with several grooves on the end face that the drive plate is contacted with intermediate transmission disk, places magnet steel in groove and is bonded drive plate with intermediate transmission disk.The utility model has the beneficial effects that providing a kind of overload coupling of low torque permanent torque that the attracting controllability of magnetism is good and stable, moment of friction needed for providing overload coupling passing movement.

Description

A kind of overload coupling of low torque permanent torque

Technical field

The utility model belongs to torque Transfer Technology field more particularly to a kind of overload coupling of low torque permanent torque.

Background technique

Power 10-20W of Weaving device main motor or so, stalling torque of the motor after output of slowing down in 10Nm or more, The torque, which runs well to equipment, has biggish destructiveness.When equipment runs load and surprisingly increases, it is necessary to safe shaft coupling Section rapidly disconnects motor and movement parts.Currently, a kind of row diaphragm friction-type safety shaft coupling commonly used in the trade, by adjustment diaphragm Precompression obtain equipment safety operation torque.But existing two problems of such shaft coupling, first is that safe torque is inadequate It is small, even if the overload coupling is transferred to minimum precompression, safely disconnect torque also in 3Nm or more, to the protection of equipment according to So be lacking.Second is that when precompression is relatively low (if toward to a high-profile, it is more more than the requirement of 1-2Nm, more to the protection of equipment Not enough), the moment of friction of diaphragm coupling is influenced by spring from shake, thus is not sufficiently stable, and needs worker in use The variation for adjusting, observing precompression repeatedly just can guarantee equipment normal use.Once worker tunes too large precompression, Huo Zhean Full moment increases in use not to be found in time, just easily causes equipment damage.

In Chinese patent literature, utility model entitled " a kind of shaft coupling that can be skidded automatically ", notification number are The patent of CN203788122U discloses a kind of shaft coupling, including be located at same rotation axis on first rotating shaft and second turn Axis has been installed with permanent magnet and the first magnetizer in the end of first rotating shaft, and permanent magnet is located on rotation axis, the first magnetizer with Permanent magnet is in close contact and extends to around permanent magnet, forms multiple convex blocks of the uniform ring cloth around permanent magnet, the The end of two shafts has been installed with the second magnetizer, and the second magnetizer is equipped with the multiple convex blocks opposite with the convex block of the first magnetizer, There are magnetic gap between the convex block of second magnetizer and the convex block of the first magnetizer, the magnetic line of force of permanent magnet via the first magnetizer and Second magnetizer forms closed magnetic circuit.There is axial pulling force between the driving shaft and transmission shaft of above-mentioned technical proposal, magnetic it Between interval influenced by mechanical axial gap big, magnetic attraction is unstable.

Summary of the invention

In order to solve the above-mentioned technical problem, the utility model provides a kind of overload coupling of low torque permanent torque, mesh The overload coupling for being to provide a kind of low torque permanent torque that the attracting controllability of magnetism is good and stable, overload coupling is provided Moment of friction needed for passing movement.

The technical solution of the utility model are as follows:

A kind of overload coupling of low torque permanent torque, it is same with output shaft including the drive plate with motor shaft synchronous revolving The transmission shift plate of step revolution, it is characterised in that: intermediate transmission disk, the intermediate biography are equipped between the drive plate and transmission shift plate Moving plate is pulled pin by bulb and is flexibly connected with transmission shift plate；On the end face that the drive plate is contacted with intermediate transmission disk radially It is even that several grooves are distributed with, magnet steel, which is placed, in groove is bonded drive plate with intermediate transmission disk.

Compared to the prior art, this programme motor shaft band nutating disk synchronous revolving, absorption of the intermediate transmission disk in magnet steel Under follow band nutating disk synchronous revolving, two bulb fingers thereon drive transmission shift plate and output shaft synchronous revolution, finger Bulb and reasonable gap common guarantee the smoothness of transmitting is moved between motor shaft and output shaft；When output shaft end encounter compared with When heavy load, as long as being more than the moment of friction that magnet steel suction can be provided, intermediate transmission disk will continue to skid around motor shaft, from And play the role of safeguard protection.In addition, the position of motor shaft and output shaft can also be set in the technical program with intermodulation, groove It sets on intermediate transmission disk or is separately mounted on intermediate transmission disk and drive plate using pairs of magnet.

Based on above scheme, the present invention is also made that following improvement:

Further, the drive plate and intermediate transmission disk are all made of ferromagnetic.It is ferromagnetic with respect to it during this technology is improved He can preferably be attracted with magnet steel material.

Further, the depth of groove is greater than magnet thickness, and the size of space of magnet steel to transmission side surface is consistent.

Further, there are free gyration apertures for the contact jaw surface parts of the driving chuck and intermediate transmission disk.

The utility model has the advantages that using the suction of permanent magnet, being provided safe in the engineer application occasion of low torque (5Nm or less) Moment of friction needed for joint passing movement；When output shaft end encounters relatively large load, as long as being more than that magnet steel suction can be provided Moment of friction, intermediate transmission disk will continue around motor shaft skid, to play the role of safeguard protection.

Detailed description of the invention

Fig. 1 is the utility model local explosion structure diagram；

Fig. 2 is the utility model main view；

Fig. 3 is cross-sectional view of the utility model main view at A-A.

In figure, 1, drive plate；2, intermediate transmission disk；3, it is driven shift plate；4, bulb is pulled pin；5, motor shaft；6, output shaft；7, Holding screw；8, magnet steel；C, the size of space；D, gyration aperture.

Specific embodiment

As shown in Figure 1-3, a kind of overload coupling of low torque permanent torque is included under the action of holding screw (7) respectively Drive plate (1) and transmission shift plate (3) of synchronous revolving, the drive plate (1) and biography are kept with motor shaft (5) and output shaft (6) Intermediate transmission disk (2) are equipped between dynamic shift plate (3), the intermediate transmission disk (2) pulls pin (4) by bulb and transmission shift plate (3) It is flexibly connected；Several grooves are radially evenly distributed on the end face that the drive plate (1) contacts with intermediate transmission disk (2), it is recessed Magnet steel (8) are placed in slot to be bonded drive plate with intermediate transmission disk.The depth of groove is greater than magnet steel (8) thickness, and magnet steel (8) arrives The size of space (c) of drive plate (1) end face is consistent；The size and number of groove diameter can be with the difference of security settings torque Change, in the present embodiment, number of recesses is 4, groove shapes are round.Drive plate (1) is ferromagnetic material, and magnet steel (8) is firmly Ground is adsorbed on groove floor；Intermediate transmission disk (2) is ferromagnetic material, is pasted under the action of magnet steel (8) with the end face of drive plate (1) It is combined, in no magneticaction, or when external torsion is greater than the shearing force that magnet steel provides, intermediate transmission disk (2) can be around Motor shaft (5) rotates freely.The end face of the end face and intermediate transmission disk (2) that are driven shift plate (3) reserves certain between freely turning round Gap (d).

The working principle of the application overload coupling is: motor shaft (5) band nutating disk (1) synchronous revolving, intermediate transmission Disk (2) follows band nutating disk (1) synchronous revolving under the absorption of magnet steel (8), and two bulb fingers (4) thereon drive transmission Shift plate (3) and output shaft synchronous revolution, the bulb of finger and reasonable gap (d) common guarantee are between motor shaft and output shaft Move the smoothness of transmitting.When output shaft end encounters relatively large load, as long as being more than the moment of friction that magnet steel suction can be provided, in Between drive plate (2) will continue around motor shaft skid, to play the role of safeguard protection.

Claims (5)

1. a kind of overload coupling of low torque permanent torque, including the drive plate with motor shaft synchronous revolving, with output shaft synchronous The transmission shift plate of revolution, it is characterised in that: be equipped with intermediate transmission disk, the intermediate transmission between the drive plate and transmission shift plate Disk is pulled pin by bulb and is flexibly connected with transmission shift plate；On the end face that the drive plate is contacted with intermediate transmission disk radially uniformly Several grooves are distributed with, places magnet steel in groove and is bonded drive plate with intermediate transmission disk.

2. overload coupling according to claim 1, it is characterised in that: the drive plate and intermediate transmission disk are all made of iron Magnetic material.

3. overload coupling according to claim 1, it is characterised in that: the depth of groove is greater than magnet thickness, magnet steel The size of space to transmission side surface is consistent.

4. overload coupling according to claim 1, it is characterised in that: the contact of the driving chuck and intermediate transmission disk There are free gyration apertures between end face.

5. overload coupling according to claim 1, it is characterised in that: the bulb, which is pulled pin, can be replaced straight pin or pin Nail.