CN220797978U - Electric cylinder and lifting equipment - Google Patents

Abstract

The utility model discloses an electric cylinder and lifting equipment, wherein the electric cylinder comprises: the motor is in transmission connection with the speed reducer, the transmission part is in transmission connection with the speed reducer, the screw rod module is connected with the transmission part, and the electromagnetic buffering assembly is connected with a driving shaft of the motor. The speed reduction of the driving shaft is realized by adopting the electromagnetic buffer assembly, so that on one hand, the speed limit can not be generated on the normal operation of the driving shaft, and the high-speed operation of the driving shaft is ensured; on the other hand, no additional energy loss is generated to the rotating drive shaft, thereby improving the rotation efficiency of the drive shaft.

Description

Electric cylinder and lifting equipment

Technical Field

The utility model relates to the technical field of electric cylinders, in particular to an electric cylinder and lifting equipment.

Background

An electric cylinder is a device for producing linear motion. The electric cylinder can be used for moving the lifting equipment up and down. When in actual use, the condition of sudden power failure occurs, and the electric cylinder can lock, so that lifting equipment is stagnated in the air. Because the lifting device is generally operated by a worker, the lifting device is required to fall back to the ground slowly due to the lag of the lifting device.

In order to solve the problem, the mechanical centrifugal brake is arranged at one end of the speed reducer, the centrifugal brake is permanently connected with the rotating shaft of the speed reducer, and when the lifting equipment falls back, the centrifugal brake can generate certain resistance to prevent the motor from rotating too fast.

However, in the conventional method, the centrifugal brake is permanently connected to the rotating shaft of the speed reducer, so that the rotating speed of the motor during normal operation is limited, and when the rotating speed of the motor exceeds a certain value, the centrifugal brake acts, so that the maximum rotating speed of the motor during normal operation cannot exceed the acting rotating speed of the centrifugal brake. This results in a reduction in the rotational efficiency of the motor shaft.

Disclosure of utility model

The utility model aims to solve the technical problems that: the existing deceleration braking mode can limit the rotating speed of the motor in normal operation and influence the technical problem of the rotating efficiency of the motor. Therefore, the utility model provides the electric cylinder and lifting equipment, which adopts an electromagnetic buffer mode to reduce the speed of the motor shaft, does not influence the high-speed operation of the motor during the work, and is beneficial to improving the rotation efficiency.

The technical scheme adopted for solving the technical problems is as follows: an electric cylinder comprising: the motor is in transmission connection with the speed reducer, the transmission part is in transmission connection with the speed reducer, the screw rod module is connected with the transmission part, and the electromagnetic buffering assembly is connected with a driving shaft of the motor.

Further, the electromagnetic buffer assembly includes: a stator part and a rotor part, the rotor part is connected with a driving shaft of the motor, and an air gap is arranged between the stator part and the rotor part.

Further, a coil and a permanent magnet are arranged in the stator component; the rotor component includes: the motor comprises a connecting flange, a spring plate and an armature, wherein the armature is connected with the connecting flange through the spring plate, and the connecting flange is connected with a driving shaft of the motor.

Further, an elastic baffle is arranged at one end of the rotor component, which is far away from the stator component.

Further, the electromagnetic buffer assembly is integrated at the tail end of the motor.

Further, a spacer is arranged at one end of the rotor component, which is close to the stator component, and the spacer is sleeved on a driving shaft of the motor.

Further, a groove is formed in the driving shaft of the motor, and the elastic baffle is located in the groove.

Further, the width of the groove is larger than that of the elastic baffle.

Further, a gasket is provided between the elastic baffle and the rotor member.

Further, the motor includes: the motor is characterized by comprising a motor main body and a motor rear cover, wherein the motor rear cover is connected with the motor main body through a protective shell, and the electromagnetic buffering assembly is positioned in the protective shell.

Further, the protective housing is provided with an isolation cover at one end close to the motor main body, and the isolation cover is connected with a driving shaft of the motor through a bearing.

Further, a release handle is arranged on the motor rear cover.

Further, the electromagnetic buffer assembly is arranged at one end, away from the motor, of the speed reducer.

Further, the electromagnetic buffer assembly is installed between the motor and the speed reducer.

The utility model also provides lifting equipment which comprises a lifting platform and an electric cylinder.

The utility model has the advantages that,

According to the electric cylinder and lifting equipment, the electromagnetic buffer assembly is adopted to realize the speed reduction of the driving shaft, so that on one hand, the speed limit on the normal operation of the driving shaft is avoided, and the high-speed operation of the driving shaft is ensured; on the other hand, no additional energy loss is generated to the rotating drive shaft, thereby improving the rotation efficiency of the drive shaft.

The electromagnetic buffer assembly is integrated in the motor, so that the high integration of the motor is improved, and the installation space required by the external connection of the conventional centrifugal brake is reduced.

Drawings

The utility model will be further described with reference to the drawings and examples.

Fig. 1 is a cross-sectional view of an electric cylinder according to a first embodiment of the present utility model.

Fig. 2 is a schematic view of an electromagnetic buffer assembly integrated into a motor according to a first embodiment of the present utility model.

Fig. 3 is a schematic structural diagram of an electromagnetic buffer assembly according to a first embodiment of the present utility model.

Fig. 4 is a schematic illustration of a spacer disposed within an air gap according to a first embodiment of the present utility model.

Fig. 5 is a cross-sectional view of an electric cylinder according to a third embodiment of the present utility model.

Fig. 6 is a schematic view of an electromagnetic buffering assembly according to a third embodiment of the present utility model.

In the figure: 1. a motor; 2. a speed reducer; 3. a transmission member; 4. a screw rod module; 5. an electromagnetic buffer assembly; 6. a protective shell; 7. an isolation cover; 8. a bearing; 9. a gasket; 10. an elastic baffle; 11. a spacer bush; 12. releasing the handle; 101. a motor main body; 102. a motor rear cover; 103. a groove; 104. a brake component; 201. a copper sleeve; 51. a stator component; 52. a rotor component; 53. an air gap; 54. a coil; 55. a permanent magnet; 521. a connecting flange; 522. a spring plate; 523. an armature.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only the structures which are relevant to the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Example 1

As shown in fig. 1 to 4, the electric cylinder of the present embodiment includes: the motor 1 is in transmission connection with the speed reducer 2, the transmission part 3 is in transmission connection with the speed reducer 2, the screw rod module 4 is connected with the transmission part 3, and the electromagnetic buffer assembly 5 is in rigid connection with a driving shaft of the motor 1. When the motor 1 works, the speed reducer 2 can be driven to rotate, and the speed reducer 2 enables the screw rod module 4 to do linear telescopic motion through the transmission part 3. When an emergency situation occurs (e.g. a sudden power failure), the drive shaft of the motor 1 locks and the screw module 4 also stops moving. Because the extending end of the screw rod module 4 is connected with the lifting platform, after the motor 1 is suddenly locked, the lifting platform cannot be stagnated in the air, and the lifting platform needs to slowly fall back to the ground. At this time, when the worker releases the braking force of the motor 1, the electromagnetic buffer assembly 5 generates a torque to the rotation of the driving shaft, and the rotation speed of the driving shaft is slowed down, so that the deceleration falling back of the lifting platform is realized.

Compared with the prior art, the utility model adopts the electromagnetic buffer assembly 5 to slow down the rotation speed of the driving shaft of the motor 1, the electromagnetic buffer assembly 5 only acts in emergency, and can not generate speed limitation on the high-speed running of the motor 1 in normal operation and can not generate extra energy loss on the driving shaft in normal rotation, thereby improving the rotation efficiency of the driving shaft.

For example, the electromagnetic buffer assembly 5 may be integrated at the trailing end of the motor 1. The electromagnetic buffer assembly 5 is integrated in the motor 1, so that the high integration of the motor 1 is improved, and the installation space required by the external connection of the conventional centrifugal brake is reduced.

Specifically, the motor 1 includes: the motor main body 101 and the motor back cover 102, motor back cover 102 is connected with motor main body 101 through protective housing 6, and electromagnetic buffer assembly 5 is located protective housing 6. The protective housing 6 is provided with an isolation cover 7 at one end close to the motor main body 101, and the isolation cover 7 is connected with the driving shaft of the motor 1 through a bearing 8. Since the electromagnetic buffer assembly 5 is an electromagnetic product, in order to prevent the electromagnetic buffer assembly 5 from affecting the normal operation of the motor 1, a magnetism isolating process is required. In this embodiment, the electromagnetic buffer assembly 5 is isolated in a space by adopting a mode that the protective shell 6 and the isolation cover 7 are matched. The protective case 6 and the isolation cover 7 may be made of aluminum or copper, which is a magnetic shielding metal material.

Specifically, the electromagnetic buffer assembly 5 includes: a stator part 51 and a rotor part 52, the rotor part 52 being rigidly connected to the drive shaft of the motor 1, an air gap 53 being provided between the stator part 51 and the rotor part 52. A coil 54 and a permanent magnet 55 are provided in the stator member 51. The stator part 51 is fixedly connected to the isolation cover 7, for example by means of screws, and the rotor part 52 is fixedly connected to the drive shaft of the electric machine 1. The rotor member 52 includes: the motor comprises a connecting flange 521, a spring plate 522 and an armature 523, wherein the armature 523 is connected with the connecting flange 521 through the spring plate 522, and the connecting flange 521 is connected with a driving shaft of the motor 1. The coil 54 is connected to a power supply of the motor 1. When the motor 1 is energized to operate normally (the coil 54 is in an energized state), the magnetic force generated by the coil 54 and the magnetic force of the permanent magnet 55 cancel each other, the armature 523 is pulled toward the connection flange 521 by the elastic force of the spring plate 522, the armature 523 is separated from the stator member 51 and is not in contact, and the drive shaft of the motor 1 can rotate freely. When the motor 1 is de-energized, the magnetic force of the coil 54 disappears, and at this time, the magnetic force of the permanent magnet 55 attracts the armature 523, and the armature 523 contacts the stator part 51, so that the rotor part 52 is integrally connected with the stator part 51. At this time, if the drive shaft of the motor 1 is intended to rotate, it is necessary to overcome the torque generated by the rotation of the stator part 51 to the rotor part 52, which reduces the rotational speed of the drive shaft of the motor 1, but does not lock the drive shaft of the motor 1, mainly playing a role of deceleration buffering.

The magnitude of the air gap 53 affects the magnitude of the torque, and the smaller the air gap 53, the larger the torque. Based on this, the magnitude of the torque can be changed by changing the magnitude of the air gap 53.

For example, the end of the rotor part 52 remote from the stator part 51 is provided with an elastic baffle 10. A groove 103 is arranged on the driving shaft of the motor 1, and the elastic baffle 10 is positioned in the groove 103. The rotor part 52 is provided with a spacer 11 at one end near the stator part 51, the spacer 11 being sleeved on the drive shaft of the motor 1. The resilient tabs 10 and spacers 11 cooperate to locate the axial position of the rotor member 52 to improve the stability of the size of the air gap 53 during operation. The spacer 11 is located at the inner ring of the stator member 51, and may further function as magnetism insulator, and the spacer 11 is made of aluminum or copper, which is a magnetism insulator metal material. For example, the width of the recess 103 is greater than the width of the resilient flap 10, so that the size of the air gap 53 can be adjusted by fine-tuning the axial position of the rotor member 52 during installation. In addition, the size of the air gap 53 can also be changed by adding a spacer 9 between the rotor member 52 and the elastic shutter 10.

For example, a brake element 104 is arranged between the motor rear cover 102 and the protective shell 6, and the brake element 104 can lock the driving shaft when the power is suddenly cut off. The motor rear cover 102 is provided with a release handle 12. The release handle 12 is connected to the brake element 104 by a connecting rod. When the drive shaft is locked, a worker can release the restriction force of the brake part 104 to the drive shaft by pulling the release handle 12, so that the drive shaft is restored to freely rotate.

The working process comprises the following steps:

When sudden power failure occurs, the driving shaft of the motor 1 is locked, the electromagnetic buffer assembly 5 is powered off, a worker releases the brake component 104 by pulling the release handle 12, the driving shaft of the motor 1 reverses and drives under the gravity action of the lifting platform, the rotor component 52 can be driven to rotate when the driving shaft rotates, the armature 523 is adsorbed by the permanent magnet 55 when the electromagnetic buffer assembly 5 is powered off, at the moment, the electromagnetic seed changing assembly 5 reverses the driving shaft to generate a torque (the torque is larger than the driving torque for driving the driving shaft to rotate and smaller than the braking torque for stopping the driving shaft to rotate), the rotating speed of the driving shaft can be slowed down, the speed reduction and the fallback of the lifting platform are realized, and the safety of the worker is ensured.

Example two

The present embodiment differs from the first embodiment in that the electromagnetic buffer assembly 5 is installed between the motor 1 and the speed reducer 2. That is, the electromagnetic buffer assembly 5 is integrated at the output of the motor 1.

Example III

As shown in fig. 5 to 6, the present embodiment differs from the first embodiment in that the electromagnetic buffer assembly 5 is mounted at the end of the speed reducer 2 remote from the motor 1. The protective housing 6 is connected with speed reducer 2, and rotor part 52 and the pivot fixed connection of speed reducer 2, electromagnetic buffer subassembly 5 pass through the pivot transmission connection of speed reducer 2 and the drive shaft of motor 1. The stator member 51 is fixed to the protective case 6 by screws. The groove 103 is provided on the rotation shaft of the speed reducer 2, and the elastic baffle 10 is located at one end of the rotor member 52 away from the stator member 51. The end of the rotating shaft of the speed reducer 2 is provided with a copper sleeve 201, the copper sleeve 201 is connected with the rotating shaft through a screw, and the copper sleeve 201 is located at one end of the rotor part 52 close to the stator part 51, namely, in the embodiment, the copper sleeve 201 and the elastic baffle 10 cooperate to position the axial position of the rotor part 52.

The working process comprises the following steps:

When the driving shaft of the motor 1 is locked, the rotating shaft of the speed reducer 2 is also stopped, and at this time, a worker pulls the release handle 12 to enable the motor 1 and the speed reducer 2 to resume rotation. The electromagnetic buffer assembly 5 generates a torque to the rotation of the rotating shaft of the speed reducer 2, so that the rotating speed of the rotating shaft of the speed reducer 2 is reduced, and the rotating speed of the driving shaft of the motor 1 is reduced.

Example IV

The embodiment provides lifting equipment, which comprises a lifting platform and an electric cylinder of the first embodiment, the second embodiment or the third embodiment. The output end of the screw rod module 4 is connected with a lifting platform, and the electric cylinder can drive the lifting platform to move up and down. The lifting platform can drive the bearing platform of scissor-fork type supports, overhead working equipment, cranes and other equipment. When the lifting platform is suddenly powered off and needs emergency descent, the lifting platform needs to be protected by decelerating and falling back. At this time, after the worker pulls the release handle 12, the electromagnetic buffer assembly 5 generates a certain stopping moment to the rotation of the driving shaft to reduce the rotation speed of the driving shaft, thereby reducing the falling speed of the platform, and further, the worker on the lifting platform can be effectively protected.

In summary, according to the electric cylinder and lifting device disclosed by the utility model, the electromagnetic buffer assembly 5 is adopted to realize the speed reduction of the driving shaft, so that on one hand, the speed limit on the normal operation of the driving shaft is avoided, and the high-speed operation of the driving shaft is ensured; on the other hand, no additional energy loss is generated to the rotating drive shaft, thereby improving the rotation efficiency of the drive shaft. The electromagnetic buffer assembly 5 is integrated in the motor 1, so that the high integration of the motor 1 is improved, and the installation space required by the external connection of the conventional centrifugal brake is reduced.

With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined as the scope of the claims.

Claims (15)

1. An electric cylinder, comprising: motor (1), speed reducer (2), drive unit (3), lead screw module (4) and electromagnetic buffer assembly (5), motor (1) with speed reducer (2) transmission is connected, drive unit (3) with speed reducer (2) transmission is connected, lead screw module (4) with drive unit (3) are connected, electromagnetic buffer assembly (5) with drive shaft connection of motor (1).

2. The electric cylinder according to claim 1, characterized in that the electromagnetic damping assembly (5) comprises: a stator part (51) and a rotor part (52), the rotor part (52) being connected to a drive shaft of the electric machine (1), an air gap (53) being provided between the stator part (51) and the rotor part (52).

3. An electric cylinder according to claim 2, characterized in that the stator part (51) is provided with a coil (54) and a permanent magnet (55); the rotor member (52) includes: -a connection flange (521), -a spring plate (522), and-an armature (523), -the armature (523) is connected to the connection flange (521) by means of the spring plate (522), -the connection flange (521) is connected to a drive shaft of the electric motor (1).

4. An electric cylinder as claimed in claim 2, characterized in that the end of the rotor part (52) remote from the stator part (51) is provided with an elastic stop (10).

5. An electric cylinder according to claim 4, characterized in that the electromagnetic buffer assembly (5) is integrated at the tail end of the motor (1).

6. An electric cylinder according to claim 5, characterized in that the end of the rotor part (52) adjacent to the stator part (51) is provided with a spacer (11), which spacer (11) is fitted over the drive shaft of the electric motor (1).

7. An electric cylinder according to claim 5, characterized in that the drive shaft of the motor (1) is provided with a recess (103), the elastic baffle (10) being located in the recess (103).

8. An electric cylinder according to claim 7, characterized in that the width of the recess (103) is greater than the width of the elastic flap (10).

9. An electric cylinder according to claim 4, characterized in that a spacer (9) is provided between the elastic baffle (10) and the rotor part (52).

10. An electric cylinder according to claim 5, characterized in that the electric motor (1) comprises: the motor comprises a motor main body (101) and a motor rear cover (102), wherein the motor rear cover (102) is connected with the motor main body (101) through a protective shell (6), and the electromagnetic buffer assembly (5) is located in the protective shell (6).

11. An electric cylinder according to claim 10, characterized in that the protective housing (6) is provided with a separating cover (7) at the end near the motor body (101), the separating cover (7) being connected to the drive shaft of the motor (1) by means of a bearing (8).

12. The electric cylinder according to claim 10, characterized in that the motor rear cover (102) is provided with a release handle (12).

13. An electric cylinder according to claim 1, characterized in that the electromagnetic buffer assembly (5) is mounted at the end of the reducer (2) remote from the motor (1).

14. An electric cylinder according to claim 1, characterized in that the electromagnetic buffer assembly (5) is mounted between the motor (1) and the reducer (2).

15. A lifting device comprising a lifting platform and an electric cylinder as claimed in any one of claims 1 to 14.