Compact electric cylinder

Abstract

An embodiment of the utility model discloses a compact electric cylinder, which comprises a sensor, a speed reducer, a motor, a ball screw nut and a screw rod, the motor is connected with the speed reducer, the speed reducer is mounted on a box body, a cylinder body is mounted on the other side of the box body, the cylinder body and the motor are positioned on two sides of the box body, one side of the ball screw nut is positioned in the cylinder body, and the other side of the ball screw nut is positioned in the screw rod. A belt pulley I is mounted at the tail end of the ball screw nut; a belt pulley II is mounted at the output end of the speed reducer; a belt is arranged between the belt pulley I and the belt pulley II; a screw rod is meshed with the ball screw nut and penetrates through the box body and the cylinder body; according to the utility model, the overall length is greatly reduced, and the accuracy of output results is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric cylinder technical field, concretely relates to a compact electric cylinder. BACKGROUND

[0002] Electric cylinder is a kind of execution mechanism that converts electric energy into mechanical energy and realizes linear reciprocating motion. Its basic principle is that the rotary motion of motor (usually servo motor or stepper motor) is converted into linear motion through transmission device (such as ball screw, planetary roller screw or trapezoidal screw, etc.). For example, when the motor rotates, the ball screw nut (connected load) will move linearly along the axis direction of screw, thereby pushing or pulling external load. The current electric cylinder screw one end installs pressure rod, causes length to be longer, is more difficult to operate in the space of low height, sensor is directly connected with pressure rod, can be affected by friction, influence the measurement result of sensor. SUMMARY

[0003] The utility model provides a compact electric cylinder, greatly reduce the overall length, and the output result accuracy is higher.

[0004] To achieve the above object, the utility model provides the following technical scheme:

[0005] A kind of compact electric cylinder, including sensor, speed reducer, motor, ball screw nut and screw rod, motor is connected with speed reducer, speed reducer is installed on box body, the other side of box body installs cylinder body, cylinder body and motor are located at the two sides of box body, one side of ball screw nut is located in cylinder body, the other end of ball screw nut is located in box body, ball screw nut end installs pulley one, pulley two is installed at the output end of speed reducer, pulley one and pulley two are set with belt between, screw rod is engaged with ball screw nut, screw rod passes through box body and cylinder body, the end of cylinder body installs sensor.

[0006] Preferably, spline sleeve is arranged between the end of cylinder body and screw rod, and the end of spline sleeve is located at the middle of sensor.

[0007] Preferably, the cylinder body includes a front cylinder and a rear cylinder, the outer diameter of the rear cylinder is greater than that of the front cylinder, the front cylinder is provided with a spline sleeve mounting groove one, the rear cylinder is provided with a mounting groove two, the diameter of the mounting groove two is greater than that of the mounting groove one, the front end of the spline sleeve is located at the mounting groove one, the rear end outer diameter of the spline sleeve is greater than the diameter of the mounting groove one, and the rear end of the spline sleeve is mounted on the front cylinder by fasteners.

[0008] Preferably, a part of the ball screw nut is located at the mounting groove two, and the ball screw nut is connected with the rear cylinder and the box body by fasteners.

[0009] Preferably, the rear end of the sensor body of the sensor is provided with a snap ring one, the front cylinder is connected with the snap ring one through a fastener, the front end of the front cylinder is provided with a protrusion, the protrusion is located in the snap ring one, the outer side of the sensor body is provided with a circle of mounting holes, and the sensor body is connected with the workbench or the production line through the mounting holes.

[0010] Preferably, the outer side of the box body is provided with a lead screw guard, one end of the lead screw is located in the lead screw guard, and the lead screw guard and the motor are located on the same side of the box body.

[0011] Preferably, the belt pulley one is provided with a snap ring two towards the side of the ball screw nut, and the snap ring two is located in the ball screw nut.

[0012] Compared with the prior art, the sensor is not directly connected with the lead screw, friction influence is avoided, the output result is more accurate and has smaller error, and the sensor is installed on the outer side, so that the sensor is convenient to replace.

[0013] The utility model discloses a motor works, drives the speed reducer, then through the belt drive, drives the ball screw nut rotation, and the ball screw nut drives the lead screw linear motion. The lead screw directly presses the product or draws the product. The overall structure is compact, and the length is small, and is suitable for smaller space work. The sensor is used for detecting the tension or pressure.

[0014] The sensor is not directly connected with the lead screw, friction influence is avoided, the output result is more accurate and has smaller error. Since the sensor is installed on the outer side, it is convenient to replace. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the embodiment schematic diagram of the utility model.

[0016] Figure 2 It is the explosion schematic diagram of the embodiment of the utility model.

[0017] Figure 3 It is the cross section schematic diagram of the embodiment of the utility model.

[0018] Figure 4 It is the sensor schematic diagram of the embodiment of the utility model.

[0019] Figure 5 It is the cylinder main view of the embodiment of the utility model.

[0020] Figure 6 It is the cylinder cross section view of the embodiment of the utility model.

[0021] Figure 7 It is the cylinder bottom view of the embodiment of the utility model.

[0022] Figure 8 It is the cylinder top view of the embodiment of the utility model.

[0023] Figure 9 It is the belt pulley schematic diagram of the embodiment of the utility model.

[0024] Figure 10 is a belt wheel sectional view of the utility model embodiment. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Apparently, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.

[0026] As shown in the figure, the utility model embodiment discloses a compact electric cylinder, including sensor 1, speed reducer 2, motor 3, ball screw nut 4 and screw rod 5, motor 3 is connected with speed reducer 2, speed reducer 3 is installed on the box body 6, the other side of box body 6 installs cylinder body 7, cylinder body 7 and motor 3 are located at the both sides of box body 6, one side of ball screw nut 4 is located in cylinder body 7, the other end of ball screw nut 4 is located in box body 6, the end of ball screw nut 4 installs pulley one 8, the output end of speed reducer 2 installs pulley two 9, and pulley one 8 and pulley two 9 are provided with belt 10 between, screw rod 5 is engaged with ball screw nut 4, and screw rod 5 passes through box body 6 and cylinder body 7, and the end of cylinder body 7 installs sensor 1.

[0027] As the Chinese patent with the application number 2018202123851, the rear end of the screw rod is installed with the main shaft, resulting in the length side length of the whole device, and increasing the parts and weight of the device.

[0028] The utility model utilizes motor 3 work, drives speed reducer 2, then through belt drive, drives ball screw nut 4 rotation, and ball screw nut 4 drives screw rod 5 linear motion. Screw rod directly presses product or pulls product. The overall structure is compact, and the length is small, and it is suitable for smaller space work. Sensor 1 is used to detect tension or pressure.

[0029] In an embodiment of the utility model, spline sleeve 11 is arranged between the end of cylinder body 7 and screw rod 5, and the end of spline sleeve 11 is located at the middle of sensor 1.

[0030] Screw rod 5 is provided with a groove corresponding to spline sleeve 11, to ensure the stable linear motion of screw rod 5. Spline sleeve 11 is used to limit the linear motion of screw rod 5, and cannot rotate or shake.

[0031] In an embodiment of the utility model, the cylinder body 7 includes the front cylinder 71 and the rear cylinder 72, the outer diameter of the rear cylinder 72 is greater than the outer diameter of the front cylinder 71, the front cylinder 71 is equipped with the spline sleeve installation groove one 711, the rear cylinder 72 is equipped with the installation groove two 721, the diameter of the installation groove two 721 is greater than the diameter of the installation groove one 711, the front end of the spline sleeve 11 is located at the installation groove one 711, the rear end outer diameter of the spline sleeve 11 is greater than the diameter of the installation groove one 711, and the rear end of the spline sleeve 11 is installed at the front cylinder 71 through the fastener. The installation groove one 711 installs the spline sleeve.

[0032] In an embodiment of the utility model, a part of the ball screw nut 4 is located at the installation groove two 721, and the ball screw nut 4 is connected with the rear cylinder 72 and the box body 6 through the fastener. The installation groove two 721 installs a part of the ball screw nut 4.

[0033] In an embodiment of the utility model, the rear end of the sensor body 101 of the sensor 1 is equipped with the snap ring one 102, the front cylinder 71 is connected with the snap ring one 102 through the fastener, the front end of the front cylinder 71 is equipped with the protrusion 73, the protrusion 73 is located in the snap ring one 102, and the outside of the sensor body 101 is equipped with a ring of installation holes 103. The sensor body 101 is connected with the workbench or production line through the installation hole 103. The sensor body 101 of the sensor 1 is structured, the sensor 1 is not directly connected with the screw rod, friction influence is avoided, the output result is higher in accuracy and smaller in error. Since the sensor 1 is installed on the outside, it is convenient to replace.

[0034] In an embodiment of the utility model, the box body 6 outside is equipped with the screw rod shield 12, one end of the screw rod 5 is located in the screw rod shield 12, and the screw rod shield 12 and the motor 3 are located at the same side of the box body 6.

[0035] In an embodiment of the utility model, the one side of the belt pulley one 8 towards the ball screw nut 4 is equipped with the snap ring two 81, and the snap ring two 81 is located in the ball screw nut 4. The ball screw nut 4 realizes that the repeatability positioning precision is extremely high, the motion straightness is better, the friction coefficient is small, the equipment maintenance and replacement frequency are reduced, the noise is lower, and the creeping phenomenon does not occur in the movement process, thereby ensuring the stability and accuracy of the equipment in the linear motion, the structure steel and the torsional resistance are strong, the accuracy and stability of the press fitting and the press fitting workpiece are ensured, the mechanical efficiency is high, the axial and radial load is large, and long-term full load operation can be easily coped with. The model of the ball screw nut 4 can select BFBY4040.

[0036] The above content is merely an example and description of the structure of the utility model, and the skilled in the art makes various modifications or supplements or adopts similar ways to replace the described specific embodiments, as long as the structure of the utility model is not deviated or exceeds the range defined in the patent claim, which should belong to the protection range of the utility model.

Claims

1. A compact electric cylinder, characterized in that: The system includes a sensor, a reducer, a motor, a ball screw nut, and a lead screw. The motor is connected to the reducer, which is mounted on a housing. A cylinder is mounted on the other side of the housing. The cylinder and the motor are located on opposite sides of the housing. One end of the ball screw nut is located inside the cylinder, and the other end is located inside the housing. A pulley is mounted on the end of the ball screw nut. A pulley is mounted on the output end of the reducer. A belt is installed between pulleys. The lead screw meshes with the ball screw nut and passes through the housing and the cylinder. A sensor is mounted on the end of the cylinder.

2. A compact electric cylinder according to claim 1, characterized in that: A spline sleeve is provided between the end of the cylinder block and the lead screw, and the end of the spline sleeve is located in the middle of the sensor.

3. A compact electric cylinder according to claim 2, characterized in that: The cylinder block includes a front cylinder and a rear cylinder. The outer diameter of the rear cylinder is larger than that of the front cylinder. The front cylinder is provided with a spline sleeve mounting groove one, and the rear cylinder is provided with a mounting groove two. The diameter of the mounting groove two is larger than that of the mounting groove one. The front end of the spline sleeve is located at one of the mounting grooves, and the outer diameter of the rear end of the spline sleeve is larger than that of the mounting groove one. The rear end of the spline sleeve is mounted on the front cylinder by fasteners.

4. A compact electric cylinder according to claim 3, characterized in that: Part of the ball screw nut is located in mounting slot two, and the ball screw nut is connected to the rear cylinder and housing by fasteners.

5. A compact electric cylinder according to claim 3, characterized in that: The sensor body has a retaining ring at the rear end, and the front cylinder is connected to the retaining ring by fasteners. The front end of the front cylinder has a protrusion located inside the retaining ring. The sensor body has a ring of mounting holes on the outside, and the sensor body is connected to the workbench or production line through the mounting holes.

6. A compact electric cylinder according to claim 1, characterized in that: The outer side of the housing is equipped with a lead screw guard, with one end of the lead screw located inside the lead screw guard. The lead screw guard and the motor are located on the same side of the housing.

7. A compact electric cylinder according to claim 1, characterized in that: A retaining ring 2 is provided on the side of the pulley facing the ball screw nut, and the retaining ring 2 is located inside the ball screw nut.

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