A telescopic and swivelling electric cylinder for engineering machines

Abstract

The utility model discloses a telescopic and rotatory electric cylinder for engineering machinery, including front end joint, the effect is connected with load, is the external thread joint, push rod, is hollow steel push rod, one end is connected through the thread screwing with front end joint, the other end bolt connection is in the connecting piece subassembly and screw attachment, and the front end cover is connected through screw with cylinder, and the effect of front end cover is installing dustproof ring, waterproof sealing ring and wear -resisting metal ring, and provides support with motor flange bolt connection for the installation of auxiliary motor, first bolt and first elastic pad are used for connecting front end cover and cylinder.

Description

Technical Field

[0001] This utility model belongs to the field of electric cylinder technology, specifically an electric cylinder for engineering machinery that is retractable and rotatable. Background Technology

[0002] Electric cylinders convert the rotary motion of a motor into linear motion, and simultaneously transform the precise speed control, revolution control, and torque control of the motor into precise speed control, position control, and thrust control; thus achieving a new series of high-precision linear motion products. Currently, the extended end of traditional electric cylinders cannot achieve controllable rotation, making them unsuitable for use in engineering machinery such as bottle cap twisters and washing machines, which greatly limits their application areas.

[0003] Therefore, it is necessary to design a telescopic and rotating electric cylinder. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, this utility model provides a telescopic and rotatable electric cylinder for engineering machinery, which effectively solves the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a telescopic and rotatable electric cylinder for engineering machinery, comprising...

[0006] The front connector, used to connect to the load, is an external threaded connector.

[0007] The push rod is a hollow steel push rod, with one end connected to the front connector via a threaded connection, and the other end bolted to the connecting assembly and lead screw accessory.

[0008] The front cover is connected to the cylinder with screws. The function of the front cover is to install the dustproof ring, waterproof sealing ring, and wear-resistant metal ring, and at the same time provide support for the auxiliary motor and bolt connection to the motor flange.

[0009] The first bolt and the first spring washer are used to connect the front cover and the cylinder.

[0010] The front buffer pad provides mechanical restraint for the electric cylinder.

[0011] The lead screw guide bearing supports the front end of the lead screw.

[0012] A lead screw can be one of the following: trapezoidal lead screw, ball screw, planetary roller screw, or rectangular threaded lead screw.

[0013] Preferably, the bearing housing supports the main bearing.

[0014] The main bearing bears external loads, either thrust or tension.

[0015] The round nut anti-reverse washer, used to press the inner ring of the main bearing into place with the auxiliary bearing nut, and to prevent the bearing nut from retracting.

[0016] The bearing nut is used to tighten the inner ring of the main bearing.

[0017] The auxiliary motor provides the drive for the rotary operation of the push rod.

[0018] Preferably, the bearing sleeve is used to position and press the right side of the outer ring of the main bearing.

[0019] The bearing spacer is used to press and position the left side of the inner ring of the main bearing.

[0020] The main motor provides drive for the system to operate with a load.

[0021] The motor mounting plate is bolted to the bearing housing. Its upper slot positions the bearing sleeve, while the other side provides positioning and screw holes for the main motor mounting.

[0022] The timing belt housing accommodates the first pulley, the second timing belt, and the second pulley.

[0023] The timing belt housing cover seals the timing belt housing.

[0024] Preferably, the fourth bolt is used to install the motor mounting plate, the timing belt housing, and the timing belt housing cover.

[0025] The fifth bolt connects the motor flange and the front cover.

[0026] The first pulley is connected to the output shaft of the main motor via a key, transmitting the motion and power of the main motor to the electric cylinder.

[0027] The sixth bolt is used to install the auxiliary motor onto the motor flange.

[0028] Preferably, the first synchronous belt, the connecting third pulley, and the driven internal spline pulley are used to transmit motion and torque.

[0029] Screws are used to install the third pulley, locking it axially to the motor output end.

[0030] The second synchronous belt, connecting the first and second pulleys, is used to transmit motion and torque.

[0031] The second pulley transmits motion and power to the lead screw via a standard flat key.

[0032] The third pulley is a pulley structure, which is connected to the output shaft of the auxiliary motor via a flat key, transmitting the motion and power of the auxiliary motor to the push rod.

[0033] The motor front baffle is used to position and install the third pulley.

[0034] Preferably, the upper cover plate seals the opening at the upper end of the motor flange.

[0035] A standard flat key is used to connect the second pulley and the lead screw, enabling them to rotate synchronously.

[0036] The seventh bolt is used to position and fix the front baffle of the motor.

[0037] The eighth bolt and the third spring washer are used to mount the front cover plate to the motor flange.

[0038] The ninth bolt is used to connect and install the motor mounting plate and the bearing housing.

[0039] Ball screw guide bearing gaskets and elastic retaining rings are used to install ball screw guide bearings.

[0040] The retaining ring is used to install the front buffer pad and the cylinder.

[0041] Preferably, the tenth bolt and the fourth spring washer are used to connect the retaining ring and the cylinder.

[0042] The eleventh bolt is used to connect the cylinder barrel and the bearing housing.

[0043] The motor flange houses the third pulley, provides a motor mounting interface, and supports the front-end components.

[0044] The passive internal spline pulley has its inner ring engaging with the outer ring of the pushrod, receiving motion from the first timing belt to drive the pushrod to rotate.

[0045] The twelfth bolt is used to tighten the wear-resistant metal ring and lock its outer ring rotation.

[0046] Preferably, the wear-resistant metal ring has its outer ring locked in place, while only the inner ring slides against the push rod, thus acting as a bearing.

[0047] The front cover, a sealing front cover, closes the opening at the front of the motor flange.

[0048] The thirteenth bolt and nut are used to secure the motor flange and front cover.

[0049] Compared with the prior art, the beneficial effects of this utility model are:

[0050] A retractable and rotatable electric cylinder for engineering machinery, through the above-mentioned optimization scheme, adds controllable rotational motion to the electric cylinder, and at the same time, its speed control range is also expanded to a certain extent under the same motor conditions, which greatly expands the application field of the electric cylinder and can be used in more complex situations. Attached Figure Description

[0051] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0052] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0053] Figure 2 This is a partially enlarged structural schematic diagram of the present invention;

[0054] Figure 3 This is a partially enlarged structural schematic diagram of the present invention.

[0055] In the diagram: 1. Front connector; 2. Push rod; 3. Dustproof ring; 4. Front cover; 5. First bolt; 6. First spring washer; 7. Waterproof sealing ring; 8. Front buffer pad; 9. Lead screw guide bearing; 10. Lead screw; 11. Cylinder; 12. Second bolt; 13. Third bolt; 14. Second spring washer; 15. Connecting assembly; 16. Rear buffer pad; 17. First O-ring; 18. Bearing housing; 19. Main bearing; 20. Round nut anti-reverse washer; 21. Bearing nut; 22. Auxiliary motor; 23. Second O-ring; 24. Oil seal; 25. Bearing sleeve; 26. Bearing spacer; 27. Oil nozzle; 28. Main motor; 29. ​​Motor mounting plate; 30. Synchronous belt housing; 31. Synchronous belt housing cover; 32. 33. Bolt 4; 34. Bolt 5; 35. First pulley; 36. Bolt 6; 37. First synchronous belt; 38. Screw; 39. Second synchronous belt; 40. Second pulley; 41. Third pulley; 42. Motor front baffle; 43. Top cover plate; 44. Ordinary flat key; 45. Bolt 8; 46. Third spring washer; 47. Ninth bolt; 48. Lead screw guide bearing washer; 49. Elastic retaining ring; 50. Retaining ring; 51. Tenth bolt; 52. Fourth spring washer; 53. Eleventh bolt; 54. Motor flange; 55. Passive internal spline pulley; 56. Twelfth bolt; 57. Wear-resistant metal ring; 58. Front cover plate; 59. Thirteenth bolt; 60. Fourteenth bolt; 61. Nut. Detailed Implementation

[0056] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0057] Depend on Figure 1-3This utility model discloses a telescopic and rotatable electric cylinder for engineering machinery, including...

[0058] Front connector 1 is used to connect to the load. In this diagram, the connector is an external thread connector, but other connectors can also be used, such as pin-end connectors, rod end bearings, etc.

[0059] The push rod 2 is a hollow steel push rod. One end of it is connected to the front connector 1 by threaded engagement, and the other end is bolted to the connecting component assembly 15 and the lead screw accessory.

[0060] Dustproof ring 3 prevents external dust from entering the electric cylinder, keeping the inside of the electric cylinder clean. The entry of impurities may cause rapid wear of the lead screw and nut, which may lead to the scrapping of the electric cylinder.

[0061] The front cover 4 is connected to the cylinder 11 by screws. The function of the front cover 4 is to install the dustproof ring 3, the waterproof sealing ring 7 and the wear-resistant metal ring 57, and at the same time provide support for the installation of the auxiliary motor 22 and bolt it to the motor flange 54.

[0062] The first bolt 5 and the first spring washer 6 connect the front end cover 4 and the cylinder 11.

[0063] Waterproof sealing ring 7 prevents external moisture from entering the electric cylinder, thus preventing water contamination of the grease inside the cylinder.

[0064] The front buffer pad 8 provides mechanical limit to the electric cylinder and cushions it in case of abnormal overtravel, preventing collisions.

[0065] The lead screw guide bearing 9 supports the front end of the lead screw 10.

[0066] The lead screw 10 can be a trapezoidal lead screw, a ball screw, a planetary roller screw, a rectangular threaded lead screw, etc.

[0067] The cylinder 11, the sealing screw 10, and the push rod 2 prevent external impurities from entering the electric cylinder and also prevent the rotating screw from injuring people.

[0068] Second bolt 12, connecting screw 10, push rod 2, connecting component assembly 15.

[0069] The third bolt 13, the second spring washer 14, connects to the main motor 28 and the motor mounting plate 29.

[0070] The connecting component assembly 15 connects the lead screw 10 and the push rod 2, and has a magnetic ring, guide belt and other components fixed on it.

[0071] The rear buffer pad 16 provides mechanical limit to the electric cylinder and provides cushioning and anti-collision in case of abnormal overtravel.

[0072] The first O-ring 17 seals the entire electric cylinder, improving its protection level.

[0073] The bearing housing 18 supports the main bearing 19.

[0074] Main bearing 19 bears external loads, either thrust or tension.

[0075] The round nut anti-reverse washer 20 and the auxiliary bearing nut 21 press against the inner ring of the main bearing 19 to prevent stress concentration in the inner ring of the main bearing 19 and to prevent the bearing nut 21 from retracting.

[0076] The bearing nut 21 is used to tighten the inner ring of the main bearing 19.

[0077] The auxiliary motor 22 provides drive for the rotation of the push rod 2.

[0078] The second O-ring 23 seals the entire electric cylinder, improving its protection level.

[0079] Oil seal 24 separates the timing belt box and bearing chamber, allowing them to be lubricated separately and preventing mutual interference.

[0080] The bearing sleeve 25 is used to position and press the right side of the outer ring of the main bearing 19.

[0081] The bearing spacer 26 is used to press and position the left side of the inner ring of the main bearing 19.

[0082] Oil nozzle 27 facilitates the maintenance and lubrication of the electric cylinder.

[0083] The main motor 28 provides drive for the system to operate with load.

[0084] The motor mounting plate 29 is bolted to the bearing housing 18, and the slot on the plate positions the bearing sleeve 25. At the same time, the other side provides positioning and screw holes for the main motor 28.

[0085] The timing belt housing 30 houses the first pulley 34, the second timing belt 38, and the second pulley 39.

[0086] The synchronous belt housing cover 31 seals the synchronous belt housing 30.

[0087] The fourth bolt 32 is used to install the motor mounting plate 29, the synchronous belt housing 30, and the synchronous belt housing cover 31.

[0088] The fifth bolt 33 connects the motor flange 54 and the front cover 4.

[0089] The first pulley 34 is connected to the output shaft of the main motor 28 via a key, transmitting the motion and power of the main motor 28 to the electric cylinder.

[0090] The sixth bolt 35 is used to install the auxiliary motor 22 onto the motor flange 54.

[0091] The first synchronous belt 36 connects to the third pulley 40 and the passive internal spline pulley 55, transmitting motion and torque.

[0092] Screw 37 is used to install the third pulley 40, so that it is axially locked to the motor output end to prevent axial movement.

[0093] The second synchronous belt 38 connects the first pulley 34 and the second pulley 39, transmitting motion and torque.

[0094] The second pulley 39 transmits motion and power to the lead screw 10 via a standard flat key 43.

[0095] The third pulley 40 is a pulley structure, which is connected to the output shaft of the auxiliary motor 22 via a flat key, transmitting the motion and power of the auxiliary motor 22 to the push rod 2.

[0096] The motor front baffle 41 is used to position and install the third pulley 40.

[0097] The upper cover plate 42 seals the opening at the upper end of the motor flange 54.

[0098] A standard flat key 43 is used to connect the second pulley 39 and the lead screw 10, so that they rotate synchronously.

[0099] The seventh bolt 44 is used to position and fix the front baffle 41 of the motor.

[0100] The eighth bolt 45 and the third spring washer 46 are used to install the front cover plate 58 onto the motor flange 54.

[0101] The ninth bolt 47 is used to connect and install the motor mounting plate 29 and the bearing housing 18.

[0102] The ball screw guide bearing gasket 48 and the elastic retaining ring 49 are used to install the ball screw guide bearing 9.

[0103] The retaining ring 50 is used to install the front buffer pad 8 and the cylinder 11 to absorb the impact when the front end collides abnormally.

[0104] The tenth bolt 51, the fourth spring washer 52, the bolted retaining ring 50 and the cylinder 11 are connected.

[0105] The eleventh bolt 53 is used to connect the cylinder 11 and the bearing housing 18.

[0106] The motor flange 54 houses the third pulley 40, provides a motor mounting interface, and supports the front-end components.

[0107] The passive inner spline pulley 55 has its inner ring used to engage with the outer ring of the push rod 2, receiving motion from the first synchronous belt 36 and driving the push rod 2 to rotate.

[0108] The twelfth bolt 56 is used to tighten the wear-resistant metal ring 57, locking its outer ring rotation and preventing it from moving.

[0109] The wear-resistant metal ring 57 has its outer ring locked and stationary, while only the inner ring rubs and slides against the push rod 2, thus acting as a bearing.

[0110] The front cover plate 58 seals the front end cover 4, thus closing the front opening of the motor flange 54.

[0111] The thirteenth bolt 59 and nut 61 are used to fix the motor flange 54 and the front cover 4. The thirteenth bolt 59 is a large bolt, which distributes the force on the front cover 4 caused by the motor flange 54 when it starts in the axial direction, and reduces the shear force on the fifth bolt 33.

[0112] Work process

[0113] The working process of achieving the telescopic function in motion state 1:

[0114] When the motor is powered on, the auxiliary motor 22 engages the brake, restricting the push rod 2 to linear motion. The passive internal spline pulley 55 drives the push rod 2 to rotate circumferentially and lock it in place. The output shaft of the main motor 28 rotates, transmitting motion to the first pulley 34 (or to the reducer, which then transmits the motion to the first pulley 34) via a clamp or key. The first pulley 34 rotates. The first pulley 34 transmits motion to the second pulley 39 via the second synchronous belt 38. The second pulley 39 transmits motion to the lead screw 10 via a standard key 43. The lead screw 10 rotates, and the lead screw nut converts the rotational motion of the lead screw into linear motion, which then drives the push rod 2 to move linearly.

[0115] The working process of achieving rotation function in motion state 2:

[0116] When the motor is powered on, the data terminal controls the output shafts of the auxiliary motor 22 and the main motor 28, and their speed makes the rotation speed of the lead screw and the telescopic rod equal.

[0117] Transmission during this process:

[0118] The output shaft of the main motor 28 transmits motion to the first pulley 34 (or to the reducer, which then transmits the motion to the first pulley 34) via a clamp or a key, causing the first pulley 34 to rotate. The first pulley 34 then transmits motion to the second pulley 39 via the second synchronous belt 38, and the second pulley 39 transmits motion to the lead screw 10 via a standard key 43, causing the lead screw 10 to rotate.

[0119] The output shaft of the auxiliary motor 22 transmits motion to the third pulley 40 (or to the reducer, which then transmits the motion to the third pulley 40) via a clamp or key, causing the third pulley 40 to rotate. The third pulley 40 then transmits motion to the driven inner spline pulley 55 via the first synchronous belt 36, which synchronously drives the push rod 2 to rotate.

[0120] When the lead screw 10 and the push rod 2 have the same rotating speed and the same rotating direction, the distal end only performs rotary motion.

[0121] Motion state 3: working process of simultaneously realizing rotation and expansion functions:

[0122] Motion transmission is the same as that in motion state 2. When the rotating speed N of the lead screw 10 controlled by the data end (assuming that the rotating direction when the telescopic rod extends when the telescopic rod does not rotate is positive, and N takes a positive value) is greater than the rotating speed n of the push rod 2 (assuming that the rotating direction when the telescopic rod extends when the telescopic rod does not rotate is positive, and n takes a positive value when the rotating direction of the push rod is positive), and when the rotating speed of the lead screw telescopic rod satisfies N>n and n≠0, the distal end of the push rod 2 extends while rotating; when the rotating speed of the lead screw telescopic rod satisfies N<n and n≠0, the distal end of the push rod 2 retracts while rotating. Wherein, when n>0, the rotation is forward rotation, and when n<0, the rotation is reverse rotation.

[0123] The data end can realize rotation and expansion of the extending end at different speeds, in different directions and with different rotating speeds by controlling the rotating speeds of the two servo motors.

[0124] The invention discloses a telescopic and rotatable electric cylinder for engineering machinery. Through the above optimization scheme, controllable rotary motion is added to the electric cylinder, and the speed control range is also expanded to a certain extent under the condition of the same motor, which greatly expands the application field of the electric cylinder and enables the electric cylinder to be used in more complex working conditions.

[0125] In this design, only one specific product based on the design principle is described. A speed-up and speed-down transmission mechanism can be added for transmission, the transmission mode can also be changed into gear transmission, sprocket transmission or other similar transmission modes, and the connection mode can also be other connection modes except internal spline, such as key groove and the like. Any substitution or modification made based on the same principle of the present invention also falls within the protection scope of the design innovation of the present invention.

[0126] It should be noted that in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or apparatus including a series of elements includes not only those elements but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0127] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A telescopic and rotatable electric cylinder for engineering machinery, characterized in that: include The front connector, used to connect to the load, is an external threaded connector. The push rod is a hollow steel push rod, with one end connected to the front connector via a threaded connection, and the other end bolted to the connecting assembly and lead screw accessory. The front cover is connected to the cylinder with screws. The function of the front cover is to install the dustproof ring, waterproof sealing ring, and wear-resistant metal ring, and at the same time provide support for the auxiliary motor and bolt connection to the motor flange. The first bolt and the first spring washer are used to connect the front cover and the cylinder. The front buffer pad provides mechanical restraint for the electric cylinder. The lead screw guide bearing supports the front end of the lead screw. A lead screw can be one of the following: trapezoidal lead screw, ball screw, planetary roller screw, or rectangular threaded lead screw.

2. The telescopic and rotatable electric cylinder for engineering machinery according to claim 1, characterized in that: The bearing housing supports the main bearing. The main bearing bears external loads, either thrust or tension. The round nut anti-reverse washer, used to press the inner ring of the main bearing into place with the auxiliary bearing nut, and to prevent the bearing nut from retracting. The bearing nut is used to tighten the inner ring of the main bearing. The auxiliary motor provides the drive for the rotary operation of the push rod.

3. The telescopic and rotatable electric cylinder for engineering machinery according to claim 2, characterized in that: The bearing sleeve is used to position and tighten the right side of the outer ring of the main bearing. The bearing spacer is used to press and position the left side of the inner ring of the main bearing. The main motor provides drive for the system to operate with a load. The motor mounting plate is bolted to the bearing housing. Its upper slot positions the bearing sleeve, while the other side provides positioning and screw holes for the main motor mounting. The timing belt housing accommodates the first pulley, the second timing belt, and the second pulley. The timing belt housing cover seals the timing belt housing.

4. The telescopic and rotatable electric cylinder for engineering machinery according to claim 3, characterized in that: The fourth bolt is used to install the motor mounting plate, the timing belt housing, and the timing belt housing cover. The fifth bolt connects the motor flange and the front cover. The first pulley is connected to the output shaft of the main motor via a key, transmitting the motion and power of the main motor to the electric cylinder. The sixth bolt is used to install the auxiliary motor onto the motor flange.

5. The telescopic and rotatable electric cylinder for engineering machinery according to claim 4, characterized in that: The first synchronous belt, connecting to the third pulley, and the driven internal spline pulley are used to transmit motion and torque. Screws are used to install the third pulley, locking it axially to the motor output end. The second synchronous belt, connecting the first and second pulleys, is used to transmit motion and torque. The second pulley transmits motion and power to the lead screw via a standard flat key. The third pulley is a pulley structure, which is connected to the output shaft of the auxiliary motor via a flat key, transmitting the motion and power of the auxiliary motor to the push rod. The motor front baffle is used to position and install the third pulley.

6. The telescopic and rotatable electric cylinder for engineering machinery according to claim 5, characterized in that: The top cover plate seals the opening at the top of the motor flange. A standard flat key is used to connect the second pulley and the lead screw, enabling them to rotate synchronously. The seventh bolt is used to position and fix the front baffle of the motor. The eighth bolt and the third spring washer are used to mount the front cover plate to the motor flange. The ninth bolt is used to connect and install the motor mounting plate and the bearing housing. Ball screw guide bearing gaskets and elastic retaining rings are used to install ball screw guide bearings. The retaining ring is used to install the front buffer pad and the cylinder.

7. The telescopic and rotatable electric cylinder for engineering machinery according to claim 6, characterized in that: The tenth bolt and the fourth spring washer are used to connect the retaining ring and the cylinder. The eleventh bolt is used to connect the cylinder barrel and the bearing housing. The motor flange houses the third pulley, provides a motor mounting interface, and supports the front-end components. The passive internal spline pulley has its inner ring engaging with the outer ring of the pushrod, receiving motion from the first timing belt to drive the pushrod to rotate. The twelfth bolt is used to tighten the wear-resistant metal ring and lock its outer ring rotation.

8. The telescopic and rotatable electric cylinder for engineering machinery according to claim 7, characterized in that: The wear-resistant metal ring has its outer ring locked in place, while only the inner ring slides against the push rod, acting as a bearing. The front cover, a sealing front cover, closes the opening at the front of the motor flange. The thirteenth bolt and nut are used to secure the motor flange and front cover.

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