An adjustable pitch electric cylinder

Abstract

The utility model belongs to electric cylinder technical field especially relates to a kind of electric cylinder of adjustable pitch, including machine case, transmission mechanism and telescopic mechanism.Transmission mechanism includes transmission motor, transmission shaft, transmission gear, adjusting gear, adjusting fixed axle, adjusting bearing and driven gear.The electric cylinder of adjustable pitch provided in the application, by adjusting gear along the axial movement of adjusting fixed axle, the meshing position of its transmission gear, driven gear can be accurately adjusted, effectively compensate the misalignment, wear and tear caused by long-term use, etc. Cause the problem of bad meshing, improve gear matching precision and transmission accuracy;By adjusting gear meshing position, avoid the excessive wear of gear due to eccentric load, impact, reduce the replacement frequency of spare parts, prolong the overall service life of electric cylinder.

Description

Technical Field

[0001] This utility model belongs to the field of electric cylinder technology, and in particular relates to an electric cylinder with adjustable tooth pitch. Background Technology

[0002] Electric cylinders, as actuators that convert the rotary motion of an electric motor into linear motion, are widely used in automation equipment, robots, precision machine tools, medical devices, and other fields. Their core transmission components typically employ a gear drive combined with a lead screw and nut structure. Power is transmitted through the gears, driving the lead screw to rotate, thereby achieving the linear extension and retraction of the piston rod.

[0003] In traditional electric cylinder gear transmission systems, the positions of components such as the drive gear and driven gear are relatively fixed, and the tooth pitch cannot be adjusted once determined. Over long-term use, the following reasons can lead to a decrease in gear transmission accuracy:

[0004] The vibrations generated during equipment operation cause slight displacement of the gear shaft system, resulting in a shift in the center distance of the gears;

[0005] Tiny errors accumulated during assembly gradually amplify over long-term use.

[0006] The aforementioned problems can lead to poor meshing between gears, resulting in phenomena such as uneven loading and impact. This not only reduces transmission accuracy and efficiency but also exacerbates gear wear, shortens service life, and increases maintenance costs. Utility Model Content

[0007] The purpose of this invention is to provide an electric cylinder with adjustable tooth pitch, which aims to solve the technical problem that the gear transmission of traditional electric cylinders is prone to misalignment and poor meshing due to long-term use, resulting in a decrease in accuracy.

[0008] To achieve the above objectives, the present invention provides an adjustable pitch electric cylinder, which includes a housing, a transmission mechanism, and a telescopic mechanism. The telescopic mechanism is disposed within the transmission mechanism, and both the transmission mechanism and the telescopic mechanism are disposed within the housing.

[0009] The transmission mechanism includes a transmission motor, a transmission shaft, a transmission gear, an adjusting gear, an adjusting fixed shaft, an adjusting bearing, and a driven gear. The transmission shaft is fixed to the transmission motor, and the adjusting gear is fixed to the outside of the transmission gear. The adjusting gear is disposed between the transmission gear and the driven gear, and meshes with both the transmission gear and the driven gear. The adjusting gear moves axially along the adjusting fixed shaft via the adjusting gear, the adjusting fixed shaft, and the adjusting bearing, and adjusts its meshing position with the transmission gear and the driven gear. The adjusting fixed shaft movably passes through the housing, and the adjusting bearing is fixedly installed on the adjusting fixed shaft and the adjusting gear. The driven gear meshes with the adjusting gear and is connected to the telescopic mechanism.

[0010] As an optional solution of this utility model, two adjusting bearings are provided, and both are fixedly installed on the outside of the adjusting fixed shaft.

[0011] As an optional solution of this utility model, an adjustment fixing plate is provided at one end of the adjustment fixing shaft, and the adjustment fixing plate is fixedly connected to the adjustment fixing shaft; the adjustment fixing plate is provided with adjustment fixing holes.

[0012] As an optional solution of this utility model, the transmission mechanism further includes a motor mounting base and a motor mounting plate. The motor mounting base is fixedly connected to one end of the transmission motor, and the motor mounting plate is fixedly connected to the other end of the transmission motor and fixedly connected to the chassis.

[0013] As an optional solution of this utility model, the telescopic mechanism includes a lead screw, a nut, a piston rod, and a cylinder. One end of the lead screw is fixedly inserted through the driven gear and disposed in the cylinder. The nut is threaded to the outside of the lead screw and fixedly connected to the piston rod. Both the nut and the piston rod are movably disposed in the cylinder.

[0014] As an optional solution of this utility model, a cylinder seat is provided at one end of the cylinder body, and the cylinder seat is fixedly connected to the cylinder body.

[0015] The adjustable tooth pitch electric cylinder provided in this utility model embodiment has at least one of the following technical effects:

[0016] The adjustable pitch electric cylinder provided in this application can precisely adjust the meshing position of the adjustable gear with the transmission gear and the driven gear by adjusting the gear's axial movement along the adjusting fixed shaft. This effectively compensates for poor meshing caused by gear misalignment and wear due to long-term use, and improves gear matching accuracy and transmission accuracy. By adjusting the gear meshing position, excessive wear of the gear due to uneven load and impact is avoided, reducing the frequency of parts replacement and extending the overall service life of the electric cylinder. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A perspective view of an electric cylinder with adjustable tooth pitch provided for an embodiment of this utility model.

[0019] Figure 2 A perspective view of an electric cylinder with adjustable tooth pitch provided for an embodiment of this utility model.

[0020] Figure 3 A side view of an adjustable pitch electric cylinder provided for an embodiment of this utility model.

[0021] Figure 4 for Figure 3 Sectional view along the middle AA.

[0022] Figure 5 The perspective view of the adjustable pitch electric cylinder provided in the embodiment of this utility model, omitting the casing.

[0023] The following are the labeling elements in the figure:

[0024] 1. Chassis; 2. Transmission mechanism; 3. Telescopic mechanism;

[0025] 20. Motor mounting bracket; 21. Drive motor; 22. Drive shaft; 23. Drive gear; 24. Adjusting gear; 25. Adjusting fixed shaft; 26. Adjusting bearing; 27. Driven gear; 28. Adjusting fixed plate; 29. ​​Motor mounting plate;

[0026] 31. Lead screw; 32. Nut; 33. Piston rod; 34. Cylinder block; 35. Cylinder seat;

[0027] 281. Adjust the fixing holes. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of this utility model, and should not be construed as limiting the utility model.

[0029] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0032] In one embodiment of this utility model, such as Figures 1-5 As shown, an electric cylinder with adjustable gear pitch is provided, including a housing 1, a transmission mechanism 2 and a telescopic mechanism 3. The telescopic mechanism 3 is disposed within the transmission mechanism 2, and both the transmission mechanism 2 and the telescopic mechanism 3 are disposed inside the housing 1.

[0033] The transmission mechanism 2 includes a drive motor 21, a drive shaft 22, a drive gear 23, an adjusting gear 24, an adjusting fixed shaft 25, an adjusting bearing 26, and a driven gear 27. The drive motor 21 is fixedly installed in the housing 1 via a motor mounting base 20 and a motor mounting plate 29. The motor mounting base 20 is fixedly connected to one side of the output end of the drive motor 21, and the motor mounting plate 29 is fixedly connected to the other end of the drive motor 21. The motor mounting plate 29 is also fixedly connected to the housing 1 by bolts.

[0034] One end of the drive shaft 22 is fixedly connected to the output shaft of the drive motor 21 via a coupling, and the other end of the drive shaft 22 is fixedly connected to the drive gear 23. When the drive motor 21 is working, it drives the drive shaft 22 and the drive gear 23 to rotate synchronously.

[0035] The adjusting gear 24 is positioned between the drive gear 23 and the driven gear 27, and meshes with both gears to form an intermediate transmission link. The adjusting fixed shaft 25 movably passes through the side wall of the housing 1, with its axis parallel to the axes of the drive gear 23 and the driven gear 27. The adjusting gear 24 is mounted on the adjusting fixed shaft 25 via two adjusting bearings 26 located on either side of the adjusting gear 24. The inner ring of each bearing is interference-fitted with the adjusting fixed shaft 25, and the outer ring is interference-fitted with the inner bore of the adjusting gear 24, allowing the adjusting gear 24 to both rotate around and move axially along the adjusting fixed shaft 25.

[0036] One end of the adjusting fixed shaft 25 extends to the outside of the chassis 1 and is fixedly connected to an adjusting fixed plate 28. The adjusting fixed plate 28 has an adjusting fixed hole 281, through which bolts pass to fix the adjusting fixed plate 28 to the outer wall of the chassis 1. After loosening the bolts, the adjusting fixed shaft 25 can be moved along the length of the adjusting fixed hole 281, thereby driving the adjusting gear 24 to move axially, changing its meshing position with the transmission gear 23 and the driven gear 27, thus achieving gear pitch adjustment. After adjustment, tightening the bolts will fix the adjusting fixed shaft 25 in place.

[0037] Driven gear 27 is connected to telescopic mechanism 3, and its central shaft is fixedly connected to lead screw 31 of telescopic mechanism 3. Telescopic mechanism 3 includes lead screw 31, nut 32, piston rod 33, and cylinder 34. Cylinder 34 is fixedly installed at one end of housing 1, and its axis coincides with the axis of lead screw 31. One end of lead screw 31 is fixedly inserted through the central hole of driven gear 27, and the other end is rotatably supported inside cylinder 34 by bearing. Nut 32 is threaded to the outside of lead screw 31, and its outer wall is fixedly connected to one end of piston rod 33. The other end of piston rod 33 extends to the outside of cylinder 34. Nut 32 and piston rod 33 are both slidably fitted with the inner wall of cylinder 34, restricting their rotational freedom, so that when lead screw 31 rotates, nut 32 drives piston rod 33 to perform linear telescopic motion along the axial direction.

[0038] A cylinder seat 35 is fixedly connected to the end of the cylinder body 34 away from the casing 1. The cylinder seat 35 has a mounting hole for fixing the electric cylinder to an external device.

[0039] The working process of this embodiment is as follows:

[0040] Power transmission: The drive motor 21 starts and drives the drive gear 23 to rotate through the drive shaft 22. The drive gear 23 drives the adjustment gear 24 to rotate through meshing with the adjustment gear 24. The adjustment gear 24 then drives the driven gear 27 to rotate through meshing with the driven gear 27, which in turn drives the lead screw 31 to rotate. The lead screw 31 converts the rotational motion into the linear extension and retraction motion of the nut 32 and the piston rod 33 through the threaded engagement with the nut 32.

[0041] Pitch adjustment: When poor gear meshing occurs after long-term use, loosen the fixing bolts on the adjusting fixing plate 28, and move the adjusting fixing shaft 25 along the length of the adjusting fixing hole 281. The adjusting gear 24 moves axially with the adjusting fixing shaft 25, changing its meshing position with the transmission gear 23 and the driven gear 27 until the optimal meshing state is achieved. Then tighten the fixing bolts to fix the adjusting fixing shaft 25, completing the pitch adjustment.

[0042] The adjustable pitch electric cylinder provided in this application can precisely adjust the meshing position of the adjustable gear 24 with the transmission gear 23 and the driven gear 27 by adjusting the gear 24 to move axially along the adjusting fixed shaft 25. This effectively compensates for poor meshing caused by gear misalignment and wear due to long-term use, and improves gear matching accuracy and transmission accuracy. By adjusting the gear meshing position, excessive wear of the gears due to uneven load and impact is avoided, reducing the frequency of parts replacement and extending the overall service life of the electric cylinder.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electric cylinder with adjustable tooth pitch, characterized in that, It includes a chassis, a transmission mechanism, and a telescopic mechanism, wherein the telescopic mechanism is disposed within the transmission mechanism, and both the transmission mechanism and the telescopic mechanism are disposed within the chassis; The transmission mechanism includes a transmission motor, a transmission shaft, a transmission gear, an adjusting gear, an adjusting fixed shaft, an adjusting bearing, and a driven gear. The transmission shaft is fixed to the transmission motor, and the adjusting gear is fixed to the outside of the transmission gear. The adjusting gear is disposed between the transmission gear and the driven gear, and meshes with both the transmission gear and the driven gear. The adjusting gear moves axially along the adjusting fixed shaft via the adjusting gear, the adjusting fixed shaft, and the adjusting bearing, and adjusts its meshing position with the transmission gear and the driven gear. The adjusting fixed shaft movably passes through the housing, and the adjusting bearing is fixedly installed on the adjusting fixed shaft and the adjusting gear. The driven gear meshes with the adjusting gear and is connected to the telescopic mechanism.

2. The electric cylinder with adjustable tooth pitch according to claim 1, characterized in that, Two adjusting bearings are provided, and both are fixedly installed on the outside of the adjusting fixed shaft.

3. An adjustable pitch electric cylinder according to claim 1, characterized in that, An adjustment fixing plate is provided at one end of the adjustment fixing shaft, and the adjustment fixing plate is fixedly connected to the adjustment fixing shaft; the adjustment fixing plate is provided with adjustment fixing holes.

4. An adjustable pitch electric cylinder according to claim 1, characterized in that, The transmission mechanism also includes a motor mounting base and a motor mounting plate. The motor mounting base is fixedly connected to one end of the transmission motor, and the motor mounting plate is fixedly connected to the other end of the transmission motor and fixedly connected to the chassis.

5. An adjustable pitch electric cylinder according to claim 1, characterized in that, The telescopic mechanism includes a lead screw, a nut, a piston rod, and a cylinder. One end of the lead screw is fixedly inserted through the driven gear and disposed within the cylinder. The nut is threaded onto the outside of the lead screw and fixedly connected to the piston rod. Both the nut and the piston rod are movably disposed within the cylinder.

6. An adjustable pitch electric cylinder according to claim 5, characterized in that, A cylinder seat is provided at one end of the cylinder body, and the cylinder seat is fixedly connected to the cylinder body.

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