Coaxial electric cylinder
By adding anti-collision pads and limit sensors to the coaxial electric cylinder, the collision problem between the planetary roller screw and the end flange plate is solved, and dust is prevented from entering through the sealing ring, which improves the use effect of the electric cylinder and Operation stability.
Patent Information
- Application Number
- CN202420913763.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2024-12-20
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The planetary roller screw in the coaxial electric cylinder is prone to impact when it moves, resulting in damage to internal parts. During long-term use, external dust enters and causes sliding blockage, affecting normal operation.
Add collision pads and limit sensors to coaxial electric cylinders to prevent impact, and install sealing rings at the connection between the planetary roller screw and screw to prevent dust from entering.
It effectively avoids collision between the planetary roller screw and the end flange plate, improves the use effect, and prevents dust from entering through the sealing structure, extends the service life of the electric cylinder and stable operation.
Smart Images
Figure CN222215408U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric cylinders, in particular to a coaxial electric cylinder. Background Art
[0002] An electric cylinder is a device that converts the rotary motion of a servo motor into reciprocating linear motion of a piston rod, driving the extension and retraction of the electric cylinder screw to generate push-pull forces. Electric cylinders have gradually replaced servo hydraulic cylinders in daily life because of their high motion accuracy, fast response, and good rigidity. Electric cylinders can be divided into servo electric cylinders and coaxial electric cylinders according to their style characteristics.
[0003] The coaxial electric cylinder drives the ball screw to move horizontally by driving the screw to rotate through the servo motor. Compared with the traditional hydraulic brake and the traditional electromechanical piston movement, it has a better effect of adjusting and controlling the actuation speed and actuation acceleration.
[0004] In the process of realizing the utility model, the inventors found that the prior art had the following problems: 1. When the planetary roller screw in the coaxial electric cylinder moves to the flange plate at one end, it is easy to collide, causing damage to the internal parts of the coaxial electric cylinder, thereby affecting the use effect of the coaxial electric cylinder; 2. When the coaxial electric cylinder is used for a long time, external dust is easy to enter the planetary roller screw inside the electric cylinder, causing the planetary roller screw to slide and become blocked, affecting the normal operation of the coaxial electric cylinder. Utility Model Content
[0005] The purpose of the utility model is to provide a coaxial electric cylinder to solve the problem that one end of the planetary roller screw of the coaxial electric cylinder proposed in the above background technology is easy to collide with the flange plate at one end when moving, causing damage to internal parts, and the use effect of the rigid coaxial electric cylinder. At the same time, when the coaxial electric cylinder is used for a long time, external dust is easy to enter the planetary roller screw inside the electric cylinder, causing the planetary roller screw to slide and block, affecting the normal operation of the coaxial electric cylinder. In order to achieve the above purpose, the utility model provides the following technical solutions: the coaxial electric cylinder includes a protective component, a driving component is installed inside the protective component, and a connecting component is arranged at one end of the driving component.
[0006] The protective component includes an electric cylinder housing, a limit groove is embedded in the interior of the electric cylinder housing, a limit sensor is installed on the inner wall of the electric cylinder housing, one end flange of the electric cylinder housing is connected to a first flange plate, the external thread of the first flange plate is connected to a first fastening bolt, the other end flange of the electric cylinder housing is connected to a second flange plate, the center of the second flange plate is glued with a first sealing ring, and the external thread of the second flange plate is connected to a second fastening bolt.
[0007] The drive assembly includes a servo motor, one end of the servo motor is drivingly connected to a coaxial connector, one end of the coaxial connector is drivingly connected to a screw, the other end of the screw is provided with a first anti-collision pad, the external thread of the screw is connected to a planetary roller screw, the internal rotation of the planetary roller screw is connected to a threaded roller, limit strips are installed on both sides of the planetary roller screw, the upper and lower ends of the planetary roller screw are fitted with a limit slider, the internal thread of the limit slider is connected to a third fastening bolt, and one end of the planetary roller screw is threadedly connected to a second sealing ring.
[0008] The connection assembly includes a load push rod, one end of which is threadedly connected to a third sealing ring, the other end of which is threadedly connected to a load end head, and one end of which is provided with a second anti-collision pad.
[0009] Further preferably, two thread grooves are embedded in the outer walls of the upper and lower ends of the planetary roller screw, and the third fastening bolt is threadedly connected to the interior of the limiting slider and the thread groove to form a threaded connection structure, and the limiting slider and the limiting sliding groove form a sliding connection structure.
[0010] Further preferably, there are four limit sensors in total, which are respectively located at both ends of the inner walls on both sides of the electric cylinder housing and are consistent in height with the limit bars.
[0011] Further preferably, a plurality of threaded rollers are evenly distributed inside the planetary roller screw, and one end of the planetary roller screw is threadedly connected to the third sealing ring.
[0012] Further preferably, the load push rod passes through the center of the second flange plate and forms a sliding connection structure with the inner wall of the first sealing ring.
[0013] Further preferably, when one end of the planetary roller screw moves to one end of the coaxial connector, one end of the first anti-collision pad and one end of the second anti-collision pad fit together.
[0014] Compared with the prior art, the utility model has the following beneficial effects:
[0015] In the utility model, two anti-collision pads are added to the end head and the inside of the screw of the coaxial electric cylinder to protect the end head and the screw. At the same time, limit sensors are added to the electric cylinder housings on both sides of the planetary roller screw to limit the position of the planetary roller screw, thereby preventing the planetary roller screw from colliding with the flange plate at one end of the end when moving, thereby improving the use effect of the coaxial electric cylinder.
[0016] In the utility model, a sealing ring is added at the connection between the planetary roller screw and the screw rod to prevent dust from entering the interior of the planetary roller screw and affecting the sliding of the planetary roller screw during movement. At the same time, a first sealing ring is added at the connection between the second flange plate and the load push rod to further prevent external dust from entering the interior of the coaxial electric cylinder, thereby improving the operating effect of the coaxial electric cylinder. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the front view structure of the utility model;
[0018] Figure 2 This is a schematic diagram of the explosion structure of the protection component of the utility model;
[0019] Figure 3 This is a schematic diagram of the internal structure of the drive assembly of the utility model;
[0020] Figure 4 It is a schematic diagram of the exploded and enlarged structure of the connection component of the utility model.
[0021] In the figure: 1. Protection component; 101. Electric cylinder housing; 102. Limit slide groove; 103. Limit sensor; 104. First flange plate; 105. First fastening bolt; 106. Second flange plate; 107. First sealing ring; 108. Second fastening bolt; 2. Drive component; 201. Servo motor; 202. Coaxial connector; 203. Screw; 204. First anti-collision pad; 205. Planetary roller screw; 206. Threaded roller; 207. Limit strip; 208. Limit slide block; 209. Third fastening bolt; 2010. Second sealing ring; 3. Connecting component; 301. Load push rod; 302. Third sealing ring; 303. Load end; 304. Second anti-collision pad. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the utility model.
[0023] See also Figures 1 to 4 The utility model provides a technical solution: a coaxial electric cylinder includes a protection component 1, a driving component 2 is installed inside the protection component 1, and a connecting component 3 is arranged at one end of the driving component 2.
[0024] The protection component 1 includes an electric cylinder housing 101, a limit slide groove 102 is embedded in the interior of the electric cylinder housing 101, a limit sensor 103 is installed on the inner wall of the electric cylinder housing 101, one end of the electric cylinder housing 101 is flange-connected with a first flange plate 104, the external thread of the first flange plate 104 is connected with a first fastening bolt 105, the other end of the electric cylinder housing 101 is flange-connected with a second flange plate 106, the center of the second flange plate 106 is glued with a first sealing ring 107, and the external thread of the second flange plate 106 is connected with a second fastening bolt 108.
[0025] The driving assembly 2 includes a servo motor 201, one end of the servo motor 201 is drivingly connected to a coaxial connector 202, one end of the coaxial connector 202 is drivingly connected to a screw 203, the other end of the screw 203 is provided with a first anti-collision pad 204, the external thread of the screw 203 is connected to a planetary roller screw 205, the internal rotation of the planetary roller screw 205 is connected to a threaded roller 206, limit strips 207 are installed on both sides of the planetary roller screw 205, the upper and lower ends of the planetary roller screw 205 are fitted with a limit slider 208, the internal thread of the limit slider 208 is connected to a third fastening bolt 209, and one end of the planetary roller screw 205 is threadedly connected to a second sealing ring 2010.
[0026] The connection assembly 3 includes a load push rod 301 , one end of which is threadedly connected to a third sealing ring 302 , the other end of which is threadedly connected to a load terminal 303 , and one end of which is provided with a second anti-collision pad 304 .
[0027] In this embodiment, Figure 2 and Figure 3 As shown, two thread grooves are embedded in the outer walls of the upper and lower ends of the planetary roller screw 205, and the third fastening bolt 209 is threadedly connected to the inside of the limit slider 208 to form a threaded connection structure with the thread groove, and the limit slider 208 and the limit slide groove 102 form a sliding connection structure; by using the third fastening bolt 209 to fix the limit slider 208 at the upper and lower ends of the planetary roller screw 205, the planetary roller screw 205 is controlled to slide in the electric cylinder housing 101, thereby improving the stability of the planetary roller screw 205 when sliding, and thereby improving the stability of the operation of the coaxial electric cylinder.
[0028] In this embodiment, Figure 1 and Figure 2As shown, there are four limit sensors 103, which are respectively located at the two ends of the inner walls of the two sides of the electric cylinder housing 101, and are consistent with the height of the limit bar 207; by adding limit bars 207 on both sides of the planetary roller screw 205 and cooperating with the limit sensors 103 at both ends to limit the sliding distance of the planetary roller screw 205, it is avoided that the servo motor 201 drives the moving distance to be too large or too small to affect the use effect of the coaxial electric cylinder, thereby improving the safety and reliability of the device.
[0029] In this embodiment, Figure 1 and Figure 3 As shown, a plurality of threaded rollers 206 are evenly distributed inside the planetary roller screw 205, and one end of the planetary roller screw 205 is threadedly connected to the third sealing ring 302; the planetary roller screw 205 is driven to translate by the plurality of threaded rollers 206 in cooperation with the rotation of the screw 203, and the second sealing ring 2010 and the third sealing ring 302 at both ends are cooperated to protect against dust, so as to prevent dust from entering the planetary roller screw 205 and causing damage to the sliding or the threaded roller 206 from getting stuck due to damage to the internal thread.
[0030] In this embodiment, Figure 1 and Figure 4 As shown, the load push rod 301 passes through the center of the second flange plate 106 and forms a sliding connection structure with the inner wall of the first sealing ring 107; by adding the first sealing ring 107 to the outer wall of the load push rod 301 and the inside of the second flange plate 106, external dust is prevented from entering the interior of the electric cylinder, further protecting against dust and improving the operating stability of the coaxial electric cylinder.
[0031] In this embodiment, Figure 3 and Figure 4 As shown, when one end of the planetary roller screw 205 moves to one end of the coaxial connector 202, one end of the first anti-collision pad 204 and one end of the second anti-collision pad 304 fit together; by arranging two anti-collision pads at the inner wall of the connection between the load end 303 and one end of the screw 203, it is avoided that the use effect of the screw 203 and the load end 303 is affected by the collision between the screw 203 and the load end 303, thereby improving the service life of the coaxial electric cylinder.
[0032] The use method and advantages of the utility model: When the coaxial electric cylinder is used, the working process is as follows:
[0033] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, first, the operator starts the servo motor 201, driving the screw 203 in the docked coaxial connector 202 to rotate; then, the screw 203 rotates while driving the multiple threaded rollers 206 in the planetary roller screw 205 to rotate, and the planetary roller screw 205 is driven to slide along the limit slide groove 102 in the electric cylinder housing 101 under the action of the limit sliders 208 at the upper and lower ends; then, the load push rod 301 connected to one end of the planetary roller screw 205 is driven to reciprocate in the center of the second flange plate 106, and at the same time, the second sealing ring 2010 and the third sealing ring 302 threadedly connected at both ends of the planetary roller screw 205 are prevented from dust. Enter the planetary roller screw 205, and at the same time, the first sealing ring 107 in the center of the second flange plate 106 can effectively prevent dust from entering the coaxial electric cylinder; finally, when the limit strips 207 on both sides of the planetary roller screw 205 pass through the limit sensors 103 on both sides of the inner wall of the electric cylinder housing 101, the servo motor 201 is controlled to stop running, so as to prevent the load push rod 301 from moving too much and causing damage to the coaxial electric cylinder. At the same time, when the planetary roller screw 205 moves to the side of the first flange plate 104, the second anti-collision pad 304 inside the load end 303 and the first anti-collision pad 204 at one end of the screw 203 fit each other, so as to further protect the device as a whole.
[0034] The above shows and describes the basic principle, main features and advantages of the utility model. Technical staff in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.
Claims
1. A coaxial electric cylinder, comprising a protective assembly (1), characterized in that: A driving component (2) is installed inside the protection component (1), and a connecting component (3) is provided at one end of the driving component (2); The protection component (1) comprises an electric cylinder housing (101), a limit slide groove (102) is embedded in the interior of the electric cylinder housing (101), a limit sensor (103) is installed on the inner wall of the electric cylinder housing (101), one end of the electric cylinder housing (101) is flange-connected with a first flange plate (104), the outer surface of the first flange plate (104) is threadedly connected with a first fastening bolt (105), the other end of the electric cylinder housing (101) is flange-connected with a second flange plate (106), the center of the second flange plate (106) is glued with a first sealing ring (107), and the outer surface of the second flange plate (106) is threadedly connected with a second fastening bolt (108); The driving assembly (2) comprises a servo motor (201), one end of the servo motor (201) is drivingly connected to a coaxial connector (202), one end of the coaxial connector (202) is drivingly connected to a screw rod (203), the other end of the screw rod (203) is provided with a first anti-collision pad (204), the external thread of the screw rod (203) is connected to a planetary roller screw (205), the internal rotation of the planetary roller screw rod (205) is connected to a threaded roller (206), both sides of the planetary roller screw rod (205) are installed with a limit strip (207), the upper and lower ends of the planetary roller screw rod (205) are fitted with a limit slider (208), the internal thread of the limit slider rod (208) is connected to a third fastening bolt (209), and one end of the planetary roller screw rod (205) is threadedly connected to a second sealing ring (2010); The connection assembly (3) comprises a load push rod (301), one end of which is threadedly connected to a third sealing ring (302), the other end of which is threadedly connected to a load end head (303), and one end of which is provided with a second anti-collision pad (304).
2. The coaxial electric cylinder according to claim 1, characterized in that: Two thread grooves are embedded in the outer walls at both ends of the planetary roller screw (205), and the third fastening bolt (209) is threadedly connected to the interior of the limiting slider (208) and the thread groove to form a threaded connection structure, and the limiting slider (208) and the limiting slide groove (102) form a sliding connection structure.
3. The coaxial electric cylinder according to claim 1, characterized in that: There are four limit sensors (103) in total, which are located at the two ends of the inner walls on both sides of the electric cylinder housing (101) and are at the same height as the limit bar (207).
4. The coaxial electric cylinder according to claim 1, characterized in that: A plurality of threaded rollers (206) are evenly distributed inside the planetary roller screw (205), and one end of the planetary roller screw (205) is threadedly connected to the third sealing ring (302).
5. The coaxial electric cylinder according to claim 1, characterized in that: The load push rod (301) passes through the center of the second flange plate (106) and forms a sliding connection structure with the inner wall of the first sealing ring (107).
6. The coaxial electric cylinder according to claim 1, characterized in that: When one end of the planetary roller screw (205) moves to one end of the coaxial connector (202), one end of the first anti-collision pad (204) and one end of the second anti-collision pad (304) fit together.