A return electric cylinder

Abstract

The present invention discloses a reciprocating electric cylinder, comprising a first bearing, an adjusting bolt, a bearing pressure plate, a connecting shaft, a second expansion sleeve, a second synchronous wheel, a turning plate, a reducer, a servo motor, a tensioning strip, a tensioning fixing block, a second adjusting bolt, an anti-rotation key, a cylinder cover plate, a muffler and a second bearing. The present invention arranges the first bearing and the second bearing on the inner side of the turning seat, and respectively provides auxiliary support to the second synchronous wheel and the first synchronous wheel through the first bearing and the second bearing, so as to further balance the force on the output end of the reducer and the ball screw, prevent the internal components of the electric cylinder from being damaged by excessive radial force, thereby extending the service life of the electric cylinder, and achieves the beneficial effect of making the force on the output end of the balance reducer and the ball screw more balanced and extending the service life of the electric cylinder.

Description

Technical Field

[0001] The present invention relates to electric cylinders and related fields, and in particular to a reciprocating electric cylinder. Background Art

[0002] The electric cylinder is a modular product that integrates the servo motor and the lead screw. It converts the rotational motion of the servo motor into linear motion. At the same time, it converts the best advantages of the servo motor - precise speed control, precise rotation speed control, and precise torque control - into precise speed control, precise position control, and precise thrust control, realizing a new revolutionary product in the high-precision linear motion series.

[0003] When the electric cylinder is in use, the two synchronous wheels are usually driven by a transmission belt. The greater the load outside the electric cylinder, the greater the pressure on the synchronous wheel. At the same time, the radial force of the lead screw and reducer on the electric cylinder is also increased, which can easily cause the inside of the electric cylinder to be damaged by the radial force. Summary of the invention

[0004] Therefore, in order to solve the above-mentioned shortcomings, the present invention provides a reciprocating electric cylinder.

[0005] The present invention is implemented in this way: a reciprocating electric cylinder is constructed, which includes a joint flange, an oil seal, a ball screw, an oil injection nozzle, a top screw, a first bearing, a tension strip, a second adjusting bolt and a cylinder cover plate, wherein the joint flange is arranged at the left end of the outer side of the piston rod, the oil seal is embedded in the left end of the inner side of the front flange, the front flange is connected to the left end face of the front cover, and the front flange and the inner ring of the oil seal are fitted to the side surface of the piston rod, the front cover is locked to the left end face of the cylinder, and a graphite copper sleeve is installed on the inner ring of the front cover, and the inner ring of the graphite copper sleeve is fitted to the side surface of the piston rod, the piston rod is slidably installed inside the cylinder, and the piston rod is locked to the left end face of the first piston, the ball screw passes through the buffer pad, the bearing pressure The plate, bearing and locking guide sleeve left end face are connected to the first expansion sleeve and the second bearing inner ring, and the ball screw is threadedly matched with the locking nut inner ring, the first piston is locked on the left end face of the second piston, and the first piston and the second piston are embedded with wear-resistant rings, the wear-resistant rings are fitted to the cylinder inner ring, the second piston, the first piston and the piston rod inner ring are threadedly matched with the ball screw, and the second piston is located at the buffer pad, the buffer pad is connected to the left side of the bearing pressure plate, the bearing pressure plate is locked to the left end face of the rear cover, the bearing is installed on the inner end face of the rear cover, the rear cover is locked to the right end face of the cylinder, and the rear cover is embedded in the bottom of the left end face of the turning plate, and the oiling nozzle is opened at the right end of the bottom of the rear cover.

[0006] Preferably, the left and right end surfaces of the locking guide sleeve are respectively tightly attached to the inner ring of the right end surface of the bearing and the left end surface of the locking nut, the inner ring of the first synchronous wheel is provided with a first expansion sleeve, and the first synchronous wheel is located on the inner side of the turning seat, the turning seat is installed on the right end surface of the turning plate, the top screw is threadedly matched with the inner side of the screw hole opened in the middle of the right end surface of the second bearing pressure plate, and the top screw is tightly attached to the right end surface of the connecting shaft, the first bearing is embedded in the middle of the left end surface of the second bearing pressure plate, and the inner ring of the first bearing is connected to the right end of the outer side of the connecting shaft, the second bearing pressure plate is clamped and connected to the top plate surface on the right side of the turning seat, and the second bearing pressure plate is threadedly matched with the side surface of the adjusting bolt through the screw hole opened at the bottom of the right end surface, and the connecting shaft is connected to the output end of the reducer, The second expansion sleeve is fastened to the inner ring of the second synchronous wheel, and the second expansion sleeve is located on the left side of the first bearing. The second synchronous wheel is connected to the first synchronous wheel through a transmission belt. A reducer is installed on the top of the left side of the turning plate. The input end of the reducer is connected to the output end of the servo motor, and the output end of the reducer passes through the top of the left end surface of the turning plate and is connected to the second synchronous wheel and the inner ring of the second expansion sleeve. The servo motor is arranged on the left side of the reducer, and the tensioning strip is arranged at the bottom of the tensioning and fixing block. The second adjusting bolt passes through the tensioning strip and the bottom end surface of the tensioning and fixing block and cooperates with the inner thread of the screw hole opened at the right end of the bottom of the reducer. The cylinder cover plate is embedded in the rear end surface of the cylinder, and an anti-rotation key and a muffler are arranged on the cylinder cover plate.

[0007] Preferably, the joint flange is larger than the outer diameter of the piston rod, and the joint flange is coaxially arranged with the center of the piston rod.

[0008] Preferably, an annular groove is provided at the left inner end of the front flange, and the inner side of the annular groove cooperates with the oil seal.

[0009] Preferably, the reducer is parallel to the servo motor, and the reducer is perpendicular to the left end surface of the turning plate.

[0010] Preferably, the turning plate is flush with the side surface of the turning seat.

[0011] Preferably, an opening is provided at the top of the right end surface of the turning seat, and the opening corresponds to the second bearing pressure plate.

[0012] Preferably, two mufflers are arranged on the outside of the cylinder cover plate, and the two mufflers are symmetrically distributed at the left and right ends of the rear part of the cylinder cover plate.

[0013] The present invention has the following advantages: The present invention provides a reciprocating electric cylinder through improvement, which has the following improvements compared with the same type of equipment:

[0014] The reciprocating electric cylinder described in the present invention has a first bearing and a second bearing arranged on the inner side of the turning seat, and the first bearing and the second bearing respectively provide auxiliary support for the second synchronous wheel and the first synchronous wheel, thereby further balancing the force on the output end of the reducer and the ball screw, preventing the internal components of the electric cylinder from being damaged by excessive radial force, thereby extending the service life of the electric cylinder, achieving the beneficial effect of making the force on the output end of the balance reducer and the ball screw more balanced and extending the service life of the electric cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the top view of the cylinder structure of the present invention;

[0017] Figure 3 The present invention Figure 2 Schematic diagram of the AA section structure;

[0018] Figure 4 It is a right side structural schematic diagram of the turning seat of the present invention.

[0019] Among them: joint flange-1, oil seal-2, front flange-3, front cover-4, graphite copper sleeve-5, cylinder-6, piston rod-7, ball screw-8, first piston-9, wear-resistant ring-10, second piston-11, buffer pad-12, bearing pressure plate-13, bearing-14, rear cover-15, oiling nozzle-16, locking guide sleeve-17, oil seal-18, locking nut-19, first synchronous wheel-20, first expansion sleeve- 21. Turning seat-22, top screw-23, first bearing-24, adjusting bolt-25, second bearing pressure plate-26, connecting shaft-27, second expansion sleeve-28, second synchronous wheel-29, turning plate-30, reducer-31, servo motor-32, tensioning strip-33, tensioning fixing block-34, second adjusting bolt-35, anti-rotation key-36, cylinder cover plate-37, muffler-38, second bearing-39. DETAILED DESCRIPTION

[0020] The following will be combined with the attached Figure 1-4 The present invention is described in detail, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The present invention is implemented in this way: a return type electric cylinder is constructed, which includes a joint flange 1, an oil seal 2, a ball screw 8, an oil injection nozzle 16, a top screw 23, a first bearing 24, a tensioning strip 33, a second adjusting bolt 35 and a cylinder cover plate 37. The joint flange 1 is arranged at the left end of the outer side of the piston rod 7, the oil seal 2 is embedded in the left end of the inner side of the front flange 3, the front flange 3 is connected to the left end face of the front cover 4, and the inner rings of the front flange 3 and the oil seal 2 are attached to the side surface of the piston rod 7, the front cover 4 is locked to the left end face of the cylinder 6, and the inner ring of the front cover 4 is installed with a graphite copper sleeve 5, the inner ring of the graphite copper sleeve 5 is attached to the side surface of the piston rod 7, the piston rod 7 is slidably installed inside the cylinder 6, and the piston rod 7 is locked to the left end face of the first piston 9, the ball screw 8 passes through the buffer pad 12, the bearing pressure plate 13, and the bearing 14. The left end face of the locking guide sleeve 17 is connected to the first expansion sleeve 21 and the inner ring of the second bearing 39, and the ball screw 8 is threadedly matched with the inner ring of the locking nut 19, the first piston 9 is locked on the left end face of the second piston 11, and the first piston 9 and the second piston 11 are embedded with a wear-resistant ring 10, the wear-resistant ring 10 fits the inner ring of the cylinder 6, the second piston 11, the first piston 9 and the inner ring of the piston rod 7 are threadedly matched with the ball screw 8, and the second piston 11 is located at the buffer pad 12, the buffer pad 12 is connected to the left side of the bearing pressure plate 13, the bearing pressure plate 13 is locked to the left end face of the rear cover 15, the bearing 14 is installed on the inner end face of the rear cover 15, the rear cover 15 is locked to the right end face of the cylinder 6, and the rear cover 15 is embedded in the bottom of the left end face of the turning plate 30, and the oiling nozzle 16 is opened at the right end of the bottom of the rear cover 15.

[0022] Furthermore, the left and right end surfaces of the locking guide sleeve 17 are respectively tightly attached to the inner ring of the right end surface of the bearing 14 and the left end surface of the locking nut 19, the inner ring of the first synchronous wheel 20 is provided with a first expansion sleeve 21, and the first synchronous wheel 20 is located on the inner side of the turning seat 22, the turning seat 22 is installed on the right end surface of the turning plate 30, the top screw 23 is threadedly matched with the inner side of the screw hole opened in the middle of the right end surface of the second bearing pressure plate 26, and the top screw 23 is tightly attached to the right end surface of the connecting shaft 27, the first bearing 24 is embedded in the middle of the left end surface of the second bearing pressure plate 26, and the inner ring of the first bearing 24 is connected to the right end of the outer side of the connecting shaft 27, the second bearing pressure plate 26 is clamped and connected to the top plate surface on the right side of the turning seat 22, and the second bearing pressure plate 26 is threadedly matched with the side surface of the adjusting bolt 25 through the screw hole opened at the bottom of the right end surface, the connecting shaft 27 is connected to the output end of the reducer 31, and the second expansion sleeve 21 is provided on the inner ring of the first synchronous wheel 20, and the first synchronous wheel 20 is located on the inner side of the turning seat 22, and the turning seat 22 is installed on the right end surface of the turning plate 30, the top screw 23 is threadedly matched with the inner side of the screw hole opened in the middle of the right end surface of the second bearing pressure plate 26, and the top screw 23 is tightly attached to the right end surface of the connecting shaft 27, the first bearing 24 is embedded in the middle of the left end surface of the second bearing pressure plate 26, and the inner ring of the first bearing 24 is connected to the right end of the outer side of the connecting shaft 27, the second bearing pressure plate 26 is The tightening sleeve 28 is fastened to the inner ring of the second synchronous wheel 29, and the second expansion sleeve 28 is located on the left side of the first bearing 24. The second synchronous wheel 29 is connected to the first synchronous wheel 20 through a transmission belt. A reducer 31 is installed on the top of the left side of the turning plate 30. The input end of the reducer 31 is connected to the output end of the servo motor 32, and the output end of the reducer 31 passes through the top of the left end surface of the turning plate 30 and is connected to the second synchronous wheel 29 and the inner ring of the second expansion sleeve 28. The servo motor 32 is arranged on the left side of the reducer 31. The tensioning strip 33 is arranged at the bottom of the tensioning and fixing block 34. The second adjusting bolt 35 passes through the tensioning strip 33 and the bottom end surface of the tensioning and fixing block 34 and then cooperates with the inner thread of the screw hole opened at the right end of the bottom of the reducer 31. The cylinder cover plate 37 is embedded in the rear end surface of the cylinder 6, and an anti-rotation key 36 and a muffler 38 are arranged on the cylinder cover plate 37.

[0023] Furthermore, the joint flange 1 is larger than the outer diameter of the piston rod 7, and the joint flange 1 and the center of the piston rod 7 are coaxially arranged, which facilitates connecting the joint flange 1 to other external equipment.

[0024] Furthermore, an annular groove is provided at the left end of the inner side of the front flange 3 , and the inner side of the annular groove matches the oil seal 2 , so that the oil seal 2 is conveniently arranged in the front flange 3 .

[0025] Furthermore, the reducer 31 is parallel to the servo motor 32, and the reducer 31 is perpendicular to the left end surface of the turning plate 30, so that the servo motor 32 can drive the output end of the reducer 31 to rotate smoothly.

[0026] Furthermore, the turning plate 30 is flush with the side surface of the turning seat 22 , thereby improving the aesthetics of the connection between the turning plate 31 and the turning seat 22 .

[0027] Furthermore, an opening is provided at the top of the right end surface of the turning seat 22 , and the opening corresponds to the second bearing pressure plate 26 , so as to facilitate fixing the second bearing pressure plate 26 on the turning seat 22 .

[0028] Furthermore, two silencers 38 are provided on the outside of the cylinder cover plate 37 , and the two silencers 38 are symmetrically distributed at the left and right ends of the rear part of the cylinder cover plate 37 , thereby improving the silencing effect inside the cylinder 6 .

[0029] The present invention provides a reciprocating electric cylinder through improvement, and its working principle is as follows:

[0030] First, the servo motor 32 on the device is connected to an external control power supply, and the joint flange 1 is fixedly connected to other external devices to be driven;

[0031] Second, when it is necessary to drive an external device to move, the servo motor 32 can be started to drive the output end of the reducer 31 to rotate, and the output end of the reducer 3 drives the second expansion sleeve 28 and the second synchronous wheel 29 to rotate, and the output end of the reducer 3 drives the connecting shaft 27 to rotate at the same time, and the connecting shaft 27 drives the first bearing 24 to rotate, and when the second synchronous wheel 29 rotates, it drives the first synchronous wheel 20 to rotate through the connected transmission belt;

[0032] Thirdly, the first synchronous wheel 20 then drives the first expansion sleeve 21 to rotate, and the first expansion sleeve 21 drives the inner ring of the second bearing 39 and the ball screw 8 to rotate, so that the rotation process of the ball screw 8 drives the second piston 11, the first piston 9 and the piston rod 7 to move leftward, and the piston rod 7 drives the joint flange 1 and the externally connected transmission shaft to move axially. When the electric cylinder is in use, the components inside the cylinder 6 can be lubricated by the oiling nozzle 16, and the second synchronous wheel 29 and the first synchronous wheel 20 are respectively supported by the first bearing 24 and the second bearing 39, so as to further balance the force on the output end of the reducer 32 and the ball screw 8, and prevent the internal components of the electric cylinder from being damaged by excessive radial force, thereby extending the service life of the electric cylinder.

[0033] The present invention provides a reciprocating electric cylinder through improvement, which respectively provides auxiliary support for the second synchronous wheel 29 and the first synchronous wheel 20 through the first bearing 24 and the second bearing 39, further balancing the forces on the output end of the reducer 32 and the ball screw 8, preventing the internal components of the electric cylinder from being damaged by excessive radial forces, thereby extending the service life of the electric cylinder, achieving the beneficial effect of making the forces on the output end of the balance reducer and the ball screw more balanced and extending the service life of the electric cylinder.

[0034] The above shows and describes the basic principle, main features and advantages of the present invention, and the standard parts used in the present invention can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0035] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A reciprocating electric cylinder, characterized in that: The structure comprises a joint flange (1), an oil seal (2), a ball screw (8), an oil injection nozzle (16), a top screw (23), a first bearing (24), a tensioning strip (33), a second adjusting bolt (35) and a cylinder cover plate (37). The joint flange (1) is arranged at the left end of the outer side of the piston rod (7), the oil seal (2) is embedded in the left end of the inner side of the front flange (3), the front flange (3) is connected to the left end face of the front cover (4), and the front flange (3) and the inner ring of the oil seal (2) are The front cover (4) is fitted on the side surface of the piston rod (7), the front cover (4) is locked on the left end surface of the cylinder (6), and the inner ring of the front cover (4) is installed with a graphite copper sleeve (5), the inner ring of the graphite copper sleeve (5) is fitted on the side surface of the piston rod (7), the piston rod (7) is slidably installed inside the cylinder (6), and the piston rod (7) is locked on the left end surface of the first piston (9), the ball screw (8) passes through the buffer pad (12), the bearing pressure plate (13), the bearing (14) and the locking guide sleeve (17 ) is connected to the first expansion sleeve (21) and the inner ring of the second bearing (39) at the rear end face, and the ball screw (8) is threadedly matched with the inner ring of the locking nut (19). The first piston (9) is locked on the left end face of the second piston (11), and the first piston (9) and the second piston (11) are embedded with a wear-resistant ring (10). The wear-resistant ring (10) is fitted on the inner ring of the cylinder (6). The second piston (11), the first piston (9) and the inner ring of the piston rod (7) are connected to the ball screw ( 8) threadedly matched, and the second piston (11) is located on the buffer pad (12), the buffer pad (12) is connected to the left side of the bearing pressure plate (13), the bearing pressure plate (13) is locked to the left end surface of the rear cover (15), the bearing (14) is installed on the inner end surface of the rear cover (15), the rear cover (15) is locked to the right end surface of the cylinder (6), and the rear cover (15) is embedded in the bottom of the left end surface of the turning plate (30), and the oil injection nozzle (16) is opened at the right end of the bottom of the rear cover (15); The joint flange (1) is larger than the outer diameter of the piston rod (7), and the joint flange (1) and the center of the piston rod (7) are coaxially arranged; An annular groove is provided at the left inner end of the front flange (3), and the inner side of the annular groove is matched with the oil seal (2).

2. The reciprocating electric cylinder according to claim 1, characterized in that: The left and right end surfaces of the locking guide sleeve (17) are respectively tightly attached to the inner ring of the right end surface of the bearing (14) and the left end surface of the locking nut (19); the inner ring of the first synchronous wheel (20) is provided with a first expansion sleeve (21), and the first synchronous wheel (20) is located on the inner side of the turning seat (22); the turning seat (22) is installed on the right end surface of the turning plate (30); the top screw (23) is threadedly matched with the inner side of the screw hole opened in the middle part of the right end surface of the second bearing pressure plate (26), and the top screw (23) is tightly attached to the connecting shaft ( The first bearing (24) is embedded in the middle of the left end surface of the second bearing pressure plate (26), and the inner ring of the first bearing (24) is connected to the right end of the outer side of the connecting shaft (27). The second bearing pressure plate (26) is connected to the right top plate surface of the turning seat (22) by snapping, and the second bearing pressure plate (26) is threadedly matched with the side surface of the adjusting bolt (25) through the screw hole opened at the bottom of the right end surface. The connecting shaft (27) is connected to the output end of the reducer (31), and the second expansion sleeve (28) is tightly connected to the connecting shaft (27). The second synchronous wheel (29) is fixed to the inner ring of the second synchronous wheel (29), and the second expansion sleeve (28) is located on the left side of the first bearing (24). The second synchronous wheel (29) is connected to the first synchronous wheel (20) through a transmission belt. A reducer (31) is installed on the top of the left side of the turning plate (30). The input end of the reducer (31) is connected to the output end of the servo motor (32). The output end of the reducer (31) passes through the top of the left end surface of the turning plate (30) and is connected to the second synchronous wheel (29) and the second expansion sleeve. (28) inner ring, the servo motor (32) is arranged on the left side of the reducer (31), the tensioning strip (33) is arranged at the bottom of the tensioning fixing block (34), the second adjusting bolt (35) passes through the tensioning strip (33) and the bottom end surface of the tensioning fixing block (34) and then engages with the inner thread of the screw hole opened at the right end of the bottom of the reducer (31), the cylinder cover plate (37) is embedded in the rear end surface of the cylinder (6), and the cylinder cover plate (37) is provided with an anti-rotation key (36) and a muffler (38).

3. According to claim 2, the reciprocating electric cylinder is characterized in that: The reducer (31) is parallel to the servo motor (32), and the reducer (31) is perpendicular to the left end surface of the turning plate (30).

4. The reciprocating electric cylinder according to claim 1, characterized in that: The turning plate (30) is flush with the side surface of the turning seat (22).

5. The reciprocating electric cylinder according to claim 2, characterized in that: The top of the right end surface of the turning seat (22) is provided with an opening, and the opening corresponds to the second bearing pressure plate (26).

6. The reciprocating electric cylinder according to claim 2, characterized in that: Two silencers (38) are arranged on the outside of the cylinder cover plate (37), and the two silencers (38) are symmetrically distributed at the left and right ends of the rear part of the cylinder cover plate (37).

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