CN219413400U - Electric cylinder for engineering machinery with front end connected with head belt buffer - Google Patents
Electric cylinder for engineering machinery with front end connected with head belt buffer Download PDFInfo
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- CN219413400U CN219413400U CN202320642784.2U CN202320642784U CN219413400U CN 219413400 U CN219413400 U CN 219413400U CN 202320642784 U CN202320642784 U CN 202320642784U CN 219413400 U CN219413400 U CN 219413400U
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- push rod
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Abstract
The utility model discloses an electric cylinder for engineering machinery with a head band buffer at the front end, which comprises: one end of the flange is fixedly arranged at one end of the push rod, and the opening at the end part of the push rod is blocked; one end of the spring seat is fixedly connected with one end of the flange plate; a front end fitting, comprising: a main body portion and a limiting plate; one end of the main body part is rod-shaped, is positioned in the spring seat and is spaced from the flange plate; the limiting plate is fixedly connected to the main body part and seals the other end of the spring seat; the inner wall of the spring seat is provided with an annular bulge part; the spring pressing block is fixedly sleeved on the main body part and positioned between the protruding part and the flange plate, and a space is reserved between the spring pressing block and the protruding part; the first buffer spring group is sleeved on the main body part, and two ends of the first buffer spring group respectively lean against the spring pressing block and the protruding part; and the second buffer spring group is sleeved on the main body part, and two ends of the second buffer spring group respectively lean against the limiting plate and the protruding part.
Description
Technical Field
The utility model belongs to the technical field of electric cylinders, and particularly relates to an electric cylinder for engineering machinery, the front end of which is provided with a head belt buffer.
Background
The electric cylinder converts the rotary motion of the motor into linear motion, and simultaneously converts the precise rotating speed control, precise rotating speed control and precise torque control of the motor into precise speed control, precise position control and precise thrust control; realizing a brand new revolutionary product of high-precision linear motion series. At present, a buffer structure is not arranged in a traditional electric cylinder structure, so that an electric cylinder used on engineering machinery such as an excavator and a bulldozer can bear impact load frequently, and the screw rod and the nut can bear periodic pulsating load due to the impact load, so that the service life of the electric cylinder is greatly reduced.
It is therefore necessary to design an electric cylinder with a damping structure.
Disclosure of Invention
The utility model aims to provide an electric cylinder for engineering machinery, the front end of which is provided with a head belt buffer, which can buffer the electric cylinder in time when encountering severe working conditions in engineering operation, so that the service life of the electric cylinder is prolonged.
The technical scheme provided by the utility model is as follows:
an electric cylinder for construction machinery having a front end with a head band buffer, comprising:
one end of the flange is fixedly arranged at one end of the push rod, and the opening at the end part of the push rod is blocked;
the spring seat is of a hollow structure, and one end of the spring seat is connected with the flange plate;
a front end fitting, comprising: a main body portion and a limiting plate;
one end of the main body part is rod-shaped, is positioned in the spring seat, is spaced from the flange plate, and extends to the outside of the spring seat to be connected with a load; the limiting plate is fixedly connected to the main body part and seals the other end of the spring seat;
the inner wall of the spring seat is provided with an annular protruding part, and a space is reserved between the protruding part and the limiting plate and between the protruding part and the flange plate respectively;
the spring pressing block is fixedly sleeved on the main body part and positioned between the protruding part and the flange plate, and a space is reserved between the spring pressing block and the protruding part;
the first buffer spring group is sleeved on the main body part, and two ends of the first buffer spring group respectively lean against the spring pressing block and the protruding part;
the second buffer spring group is sleeved on the main body part, and two ends of the second buffer spring group respectively lean against the limiting plate and the protruding part.
Preferably, the main body part is fixedly provided with a guide key; a key groove is formed in the protruding part along the axial direction; the guide key is disposed in the key groove in a matching manner and is axially movable along the key groove.
Preferably, the electric cylinder for construction machine having a front end with a head band buffer further includes: the spring lock nut is arranged on the main body part and is positioned between the flange plate and the spring pressing block;
the spring lock nut is connected to the main body through threads and is used for axially fixing the spring pressing block.
Preferably, the flange plate faces one end of the spring seat and is provided with a cylindrical positioning groove along the axial direction, one end of the spring seat is provided with a circular positioning boss, and the positioning boss is arranged in the positioning groove in a matching manner.
Preferably, the method further comprises:
a screw rod;
the nut is arranged on the screw rod in a matching way;
the driving motor drives the screw rod to rotate;
the push rod is of a hollow structure and coaxially sleeved on the screw rod; one end of the push rod is fixedly connected with the nut;
the screw rod can drive the nut and the push rod to axially move when rotating.
Preferably, the electric cylinder for construction machine having a front end with a head band buffer further includes:
the lower support lug is connected to the electric cylinder and used for connecting an external machine;
the lower support lug is positioned at one end, far away from the front end connector, of the electric cylinder.
Preferably, the electric cylinder for construction machine having a front end with a head band buffer further includes:
the input end of the speed reducer is connected with the output end of the driving motor, and the output end provides power for the screw rod.
Preferably, the electric cylinder for construction machine having a front end with a head band buffer further includes:
the driving wheel is fixedly connected to the output end of the speed reducer;
the idler wheel is meshed with the driving wheel for transmission;
a driven wheel meshed with the idler wheel for transmission;
one end of the screw rod is fixedly connected with the driven wheel in a coaxial mode.
Preferably, the electric cylinder for construction machine having a front end with a head band buffer further includes:
the gear box is covered outside the driving wheel, the idle wheel and the driven wheel;
wherein, the shell of the speed reducer is fixedly connected to the gear box;
a bearing chamber fixedly connected to the gear case;
a main bearing mounted within the bearing chamber;
wherein the lead screw is rotatably supported in the main bearing.
Preferably, the electric cylinder for construction machine having a front end with a head band buffer further includes:
the cylinder barrel is fixedly sleeved outside the push rod and the screw rod;
the rotation stopping piece is fixedly arranged on the outer wall of the push rod;
the inner wall of the cylinder barrel is provided with a guide groove along the axial direction, and the rotation stopping piece is arranged in the guide groove in a matching mode and can move along the guide groove.
The beneficial effects of the utility model are as follows:
according to the electric cylinder for engineering machinery, the front end of the electric cylinder is connected with the head belt buffer, and the buffer spring groups are arranged on the left side and the right side of the front end connector, so that the electric cylinder can be buffered in time when encountering severe working conditions in engineering operation, and the service life of the electric cylinder is greatly prolonged; and the electric cylinder is driven by a gear, so that the rigidity is better.
Drawings
Fig. 1 is a schematic view of the general structure of an electric cylinder for a construction machine with a front-end headband damper according to the present utility model.
Fig. 2 is an enlarged schematic view of the front end of the electric cylinder according to the present utility model.
Fig. 3 is a schematic cross-sectional view of a lower lug according to the present utility model.
Detailed Description
The present utility model is described in further detail below with reference to the drawings to enable those skilled in the art to practice the utility model by referring to the description.
As shown in fig. 1 to 3, the present utility model provides an electric cylinder for a construction machine having a front end with a head buffer, which comprises a front end joint 1, a push rod 2, a dust ring 3, a waterproof seal ring 4, a front end cap 5, an o-ring 6, a guide groove 7, a nipple 8, a cylinder tube 9, a rotation stop key 10, a main bearing 11, a bearing chamber 12, a main bearing housing 13, a gear housing 14, a screw 15, a gear box cover 16, an auxiliary bearing 17, a driven wheel 18, an idle wheel 19, a driving wheel 20, a speed reducer 21, a driving motor 22, an oil seal 23, a bearing nut 24, a compression nut 25, a first buffer spring group 26, an inner rotation stop key 27, a nut 28, a second buffer spring group 29, a lead screw guide bearing 30, a lead screw guide bearing 32, a flat key 33, a lead screw 34, a lower support lug 35, a push rod guide bearing 37, a spring seat 38, a guide key 39, a spring block 40, a spring lock nut 41, a flange end 42, a screw 43 and a cushion pad 44.
An output shaft of the driving motor 22 is connected with an input end of the speed reducer 21; the driving wheel 20 is of a gear structure and is connected with an output shaft of the speed reducer 21 through a flat key; the idler wheel 19 is of a gear structure and is meshed with the driving wheel 20 and the driven wheel 18 for transmission; the driven wheel 18 is of a gear structure and transmits motion and power to the screw 34 via the flat key 33.
The driving motor 22 converts electric energy into mechanical energy, and the driving motor 22 may be a three-phase alternating current motor, a servo motor or a direct current motor. The speed reducer 21 performs speed reduction and torque increase on the motor 22, and in this embodiment, the speed reducer 21 adopts a planetary speed reducer.
The gear case 14 is covered outside the driving wheel 20, the idle wheel 19 and the driven wheel 18, and the gear case 14 and the gear case cover 16 are locked by the screws 15. The gear case cover 16 seals the gear case 14 and is fitted with a plurality of auxiliary bearings 17, and the idler gear 19, the drive gear 20, and the driven gear 18 are positioned and supported by the auxiliary bearings 17, respectively.
The shell of the speed reducer 21 is fixedly connected to the gear box 14; the bearing chamber 12 is fixedly connected to the gear box 14; the main bearing 11 is mounted in a bearing housing 12. Wherein the screw 34 is rotatably supported in the main bearing 11. The main bearing 11 receives an external load pushing or pulling force, and the bearing housing 12 supports the main bearing 11. The main bearing sleeve 13 positions the outer ring of the main bearing 12. The left end cover of the gear box 14 is provided with an oil seal 23, and one end (right end) of the screw rod 34 penetrates through the oil seal 23 and extends into the gear box 14 to be connected with the driven wheel 18. The oil seal 23 separates the gear box 14 from the cylinder so that grease inside the cylinder is lubricated separately from grease inside the gear box 14. The bearing nut 24 fixes the inner ring of the main bearing 11, which is screwed to the lead screw 34.
The nut 28 is matingly mounted on the lead screw 34. The push rod 2 is a hollow steel push rod and is coaxially sleeved on the screw rod 34; one end of the push rod 2 is sleeved on the nut 28, the inner rotation stopping key 27 is arranged on the nut 28, a groove 36 matched with the inner rotation stopping key 27 is formed in the inner wall of the push rod 2, and the groove 36 is formed in the axial direction of the push rod 2 to stop rotation of the nut 28. The compression nut 25 is screwed on the right end of the push rod 2 for axially compressing the nut 28. A screw guide bearing 30 is arranged in the push rod 2 and supports the left end of a screw 34. The lead screw guide bearing 30 is axially fixed by a collar 32.
The cylinder 9 is fixedly sleeved outside the push rod 2 and the screw rod 34, seals the screw rod 34 and the push rod 2, prevents external impurities from entering the electric cylinder, and simultaneously prevents the rotating screw rod 34 from hurting people. The rotation stopping piece 10 is fixedly arranged on the outer wall of the push rod 2; the inner wall of the cylinder 9 is provided with a guide groove 7 along the axial direction, and the rotation stopping member 27 is arranged in the guide groove 7 in a matching manner and moves along the guide groove 7. The rotation stopping member 27 and the guide groove 7 are provided to stop the rotation of the push rod 2 so that the push rod 2 can only move linearly. The screw 34 drives the nut 28 and the push rod 2 to move axially when rotated. The screw 34 can be a trapezoidal screw, a ball screw, a planetary roller screw, a rectangular threaded screw or the like; correspondingly, the nut 28 converts the rotary motion of the screw 34 into a linear motion of the nut 28, and the nut 28 may be a trapezoidal nut, a ball nut, a planetary roller nut, a rectangular threaded nut, or the like.
The right-hand member of cylinder 9 cup joints the left end at bearing room 12, and the front end housing 5 passes through screw connection with the left end of cylinder 9, and the effect of front end housing 5 is installation dust ring 3, waterproof sealing 4 and push rod guide bearing 37. The dust ring 3 prevents external dust from entering the interior of the electric cylinder, so that the interior of the electric cylinder is always kept clean, since the entry of foreign matter may cause rapid wear of the screw rod 34 and the nut 28, thereby scrapping the electric cylinder. The waterproof sealing ring 4 prevents external moisture from entering the interior of the electric cylinder, so that grease in the interior of the electric cylinder is not polluted by water. The push rod guiding bearing 37 guides the push rod 2, so that the push rod 2 moves more stably, and the push rod guiding bearing 37 is preferably made of self-lubricating materials. The junction of cylinder 9 and bearing room 12 and the junction of cylinder 9 and front end housing all are provided with o type circle 6, and o type circle 6 seals the whole electric jar, has improved the protection level of electric jar. The cylinder barrel 9 is provided with a nozzle 8, so that the electric cylinder is convenient to maintain and lubricate.
One end of the flange 42 is fixedly mounted on one end (left end) of the push rod 2 through threads, and the opening of the (left) end of the push rod 2 is blocked. The spring seat 38 is hollow, and one end of the spring seat 38 is fixedly connected to the other end of the flange 42 by a screw 43. The flange 42 is connected to the push rod 2 and the spring seat 38, respectively, to transmit load.
The front-end fitting 1 includes: a main body 1a and a limiting plate 1b. One end of the main body part 1a is rod-shaped, is positioned in the spring seat 38 and is spaced from the flange 42, and the other end extends to the outside of the spring seat 38 to be connected with a load; the stopper plate 1b is fixedly attached to the main body portion 1a, and closes off the other end of the spring seat 38. The inner wall of the spring seat 38 has an annular protruding portion, and the protruding portion is disposed at the middle end of the spring seat 38, and has a space with the limiting plate 1b and the flange 42.
The spring pressing block 40 is fixedly sleeved on the main body part 1a and is positioned between the protruding part and the flange 42, and a space is reserved between the spring pressing block 40 and the protruding part. The first buffer spring group 26 is sleeved on the main body part, and two ends of the first buffer spring group 26 respectively lean against the spring pressing block 40 and the protruding part. The second buffer spring group 29 is sleeved on the main body part 1a, and two ends of the second buffer spring group 29 respectively lean against the limiting plate 1b and the protruding part. The right end of the main body part 1a is provided with external threads, and a spring lock nut 41 is connected to the main body part 1a through threads and is positioned between a flange 42 and a spring pressing block 40; the spring locking nut 41 is abutted against the spring pressing block 40 for axially fixing the spring pressing block 40, and the spring locking nut 41 provides a certain pre-pressing force for the first buffer spring set 26.
The main body 1a is fixedly provided with a guide key 39; a key groove is axially formed in the protruding part of the spring seat 38; the guide key 39 is matingly disposed in the keyway and is axially movable along the keyway. The guide key 39 is provided so that the front-end fitting 1 does not rotate when slightly displaced left and right. The function of the front end fitting 1 is to be connected to a load, in this embodiment the front end fitting 1 is an externally threaded fitting, in other embodiments other fittings may be used, such as a pin end, rod end joint bearing, etc.
Preferably, a cylindrical positioning groove is axially formed in one end of the flange 42, facing the spring seat 38, and a circular positioning boss is disposed at one end of the spring seat 38, and the positioning boss is disposed in the positioning groove in a matching manner, so as to realize installation positioning of the spring seat 38.
Preferably, the left end face of the bearing chamber 12 and the right end face of the front end cover 5 are respectively provided with a buffer pad 44, and when the screw rod 34 of the electric cylinder is in overtravel operation, the buffer pad 44 buffers the impact of the electric cylinder to a certain extent, so that the electric cylinder is prevented from being damaged due to the overtravel operation.
The lower lug 35 is connected to the gear box cover 16, i.e. at the end of the electric cylinder remote from the front end fitting 1 (the right end of the electric cylinder), for connection to external machinery. When the electric cylinder is pulled, the front end connector 1 has a tendency to move leftwards, so that the spring lock nut 41 is driven to press the spring pressing block 40, the first buffer spring set 26 is further extruded, after the first buffer spring set 26 buffers the load, the load is transmitted to the spring seat 38, the spring seat 38 is connected with the flange plate 42 through screws, the load is transmitted to the flange plate 42, then the load is transmitted to the gear box 14 and the gear box cover 16 through the push rod 2, the nut 28, the screw rod 34 and the main bearing 11, and finally the force is discharged through the lower support lug 35. When the electric cylinder is thrust, the front end connector 1 has a tendency to move rightwards, so that the end face of the front end connector can press the second buffer spring group 29, after the second buffer spring group 29 buffers the load, the load is transferred to the spring seat 38, the spring seat 38 is connected with the flange end 42 through screws, the load is transferred to the flange end 42, then the load is transferred to the gear box 14 and the gear box cover 16 through the push rod 2, the nut 28, the screw rod 34 and the main bearing 11, and finally the force is unloaded through the lower support lug 35.
The working process of the electric cylinder for engineering machinery with the buffer head band at the front end comprises the following steps:
the driving motor 22 is electrified, the motor shaft rotates, the motor shaft transmits motion to the planetary reducer 21 through the anchor ear or the flat key, the output shaft of the planetary reducer 21 starts to rotate, and then the driving wheel 20 is driven to rotate through the flat key on the output shaft. The driving wheel 20 transmits the motion to the driven wheel 18 through the idle wheel 19, the driven wheel 18 transmits the motion to the screw rod 34 through the flat key 33, the screw rod 34 rotates, the nut 28 converts the rotation motion of the screw rod into linear motion, and then the push rod 2 is driven to perform linear motion.
The first buffer spring group 26 is arranged on the right side of the front end connector 1, when the electric cylinder is pulled, the connector 1 has a leftward movement trend, so that the spring lock nut 41 is driven to press the spring pressing block 40, the first buffer spring group 26 is extruded, after the first buffer spring group 26 buffers a load, the load is transmitted to the spring seat 38, the spring seat 38 is connected with the flange end 42 through a screw, the load is transmitted to the flange end 42, then the load is transmitted to the gear box and the gear box cover through the push rod 2, the nut 28, the screw rod 34 and the main bearing 11, and finally the force is unloaded through the lower support lug 35.
The second buffer spring set 29 is arranged on the left side of the front end connector 1, when the electric cylinder is pushed, the front end connector 1 has a tendency to move rightwards, so that the end face of the front end connector 1 can press the second buffer spring set 29, after the second buffer spring set 29 buffers a load, the load is transferred to the spring seat 38, the spring seat 38 is connected with the flange end 42 through screws, the load is transferred to the flange end 42, then the load is transferred to a gear box and a gear box cover through the push rod 2, the nut 28, the screw rod 34 and the main bearing 11, and finally the force is removed through the lower support lug 35.
The electric cylinder for engineering machinery with the front end provided by the utility model is buffered, so that the impact of external impact load on the electric cylinder is greatly reduced, and the service life of the electric cylinder is prolonged.
Although embodiments of the present utility model have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the utility model would be readily apparent to those skilled in the art, and accordingly, the utility model is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (10)
1. An electric cylinder for construction machinery having a front end with a head band buffer, comprising:
one end of the flange is fixedly arranged at one end of the push rod, and the opening at the end part of the push rod is blocked;
the spring seat is of a hollow structure, and one end of the spring seat is connected with the flange plate;
a front end fitting, comprising: a main body portion and a limiting plate;
one end of the main body part is rod-shaped, is positioned in the spring seat, is spaced from the flange plate, and extends to the outside of the spring seat to be connected with a load; the limiting plate is fixedly connected to the main body part and seals the other end of the spring seat;
the inner wall of the spring seat is provided with an annular protruding part, and a space is reserved between the protruding part and the limiting plate and between the protruding part and the flange plate respectively;
the spring pressing block is fixedly sleeved on the main body part and positioned between the protruding part and the flange plate, and a space is reserved between the spring pressing block and the protruding part;
the first buffer spring group is sleeved on the main body part, and two ends of the first buffer spring group respectively lean against the spring pressing block and the protruding part;
the second buffer spring group is sleeved on the main body part, and two ends of the second buffer spring group respectively lean against the limiting plate and the protruding part.
2. The electric cylinder for construction machine having a front end with a head band buffer according to claim 1, wherein a guide key is fixedly provided on the main body; a key groove is formed in the protruding part along the axial direction; the guide key is disposed in the key groove in a matching manner and is axially movable along the key groove.
3. The electric cylinder for construction machine having a front end-mounted head band damper according to claim 1 or 2, further comprising: the spring lock nut is arranged on the main body part and is positioned between the flange plate and the spring pressing block;
the spring lock nut is connected to the main body through threads and is used for axially fixing the spring pressing block.
4. The electric cylinder for construction machinery having a front end with a head band buffer according to claim 3, wherein a cylindrical positioning groove is axially provided at one end of the flange facing the spring seat, a circular positioning boss is provided at one end of the spring seat, and the positioning boss is disposed in the positioning groove in a matching manner.
5. The electric cylinder for construction machine having a head band buffer according to claim 4, further comprising:
a screw rod;
the nut is arranged on the screw rod in a matching way;
the driving motor drives the screw rod to rotate;
the push rod is of a hollow structure and coaxially sleeved on the screw rod; one end of the push rod is fixedly connected with the nut;
the screw rod can drive the nut and the push rod to axially move when rotating.
6. The electric cylinder for construction machine having a head band damper according to claim 1, further comprising:
the lower support lug is connected to the electric cylinder and used for connecting an external machine;
the lower support lug is positioned at one end, far away from the front end connector, of the electric cylinder.
7. The electric cylinder for construction machine having a head band buffer according to claim 6, further comprising:
the input end of the speed reducer is connected with the output end of the driving motor, and the output end provides power for the screw rod.
8. The electric cylinder for construction machine having a head band buffer according to claim 7, further comprising:
the driving wheel is fixedly connected to the output end of the speed reducer;
the idler wheel is meshed with the driving wheel for transmission;
a driven wheel meshed with the idler wheel for transmission;
one end of the screw rod is fixedly connected with the driven wheel in a coaxial mode.
9. The electric cylinder for construction machine having a front-end head band damper according to claim 8, further comprising:
the gear box is covered outside the driving wheel, the idle wheel and the driven wheel;
wherein, the shell of the speed reducer is fixedly connected to the gear box;
a bearing chamber fixedly connected to the gear case;
a main bearing mounted within the bearing chamber;
wherein the lead screw is rotatably supported in the main bearing.
10. The electric cylinder for construction machine having a front-end head band damper according to claim 9, further comprising:
the cylinder barrel is fixedly sleeved outside the push rod and the screw rod;
the rotation stopping piece is fixedly arranged on the outer wall of the push rod;
the inner wall of the cylinder barrel is provided with a guide groove along the axial direction, and the rotation stopping piece is arranged in the guide groove in a matching mode and can move along the guide groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320642784.2U CN219413400U (en) | 2023-03-29 | 2023-03-29 | Electric cylinder for engineering machinery with front end connected with head belt buffer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320642784.2U CN219413400U (en) | 2023-03-29 | 2023-03-29 | Electric cylinder for engineering machinery with front end connected with head belt buffer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219413400U true CN219413400U (en) | 2023-07-25 |
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ID=87206910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320642784.2U Active CN219413400U (en) | 2023-03-29 | 2023-03-29 | Electric cylinder for engineering machinery with front end connected with head belt buffer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219413400U (en) |
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2023
- 2023-03-29 CN CN202320642784.2U patent/CN219413400U/en active Active
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