Universal structure for connecting electric cylinder and electronic ruler

Abstract

The utility model discloses a general structure for connecting an electric cylinder and an electronic ruler, which relates to the field of electric cylinders and comprises an electric cylinder component, a balance electric cylinder guide rod rotating component mounted on the electric cylinder component, and an electronic ruler component connected between the electric cylinder component and the balance electric cylinder guide rod rotating component, the electric cylinder assembly comprises an electric cylinder barrel, an electric cylinder guide rod, an electric cylinder upper end cover and an upper U-shaped fork, the electric cylinder upper end cover is installed at the end of the electric cylinder barrel, and the electric cylinder guide rod is arranged on the inner side of the electric cylinder barrel and slidably connected with the electric cylinder upper end cover. By arranging the balance electric cylinder guide rod rotating assembly, the electronic ruler can be installed on an anti-torsion electric cylinder and can also be installed on a non-anti-torsion electric cylinder, the problems that the motion precision of the non-anti-torsion electric cylinder is poor in a three-degree-of-freedom platform or a six-degree-of-freedom platform, and the electronic ruler cannot be installed are solved, and the structural design of the electronic rulers installed on the two electric cylinders is consistent; meanwhile, the high-precision electronic ruler is arranged to be matched with the electric cylinder, and the sensitivity of the electric cylinder can be improved.

Description

Technical Field

[0001] The utility model relates to the field of electric cylinders, in particular to a universal structure for connecting an electric cylinder with an electronic ruler. Background Art

[0002] The electric cylinder is a modular product that integrates a servo motor and a lead screw. It can convert the rotational motion of the servo motor into linear motion, and can replace hydraulic cylinders and pneumatic cylinders. It has the advantages of being more environmentally friendly, more energy-efficient, and cleaner. It can be easily connected to control systems such as PLC to achieve high-precision motion control.

[0003] At present, according to the actual needs of users, electric cylinders can be divided into anti-rotation electric cylinders and non-anti-rotation electric cylinders. General applications require anti-rotation restrictions on the piston rod. In some cases, such as front and rear U-shaped fork-type electric cylinders, six-degree-of-freedom platforms, etc., anti-rotation electric cylinders are not required. The rotation of the piston rod will affect the displacement of the cylinder. Generally, whether the electric cylinder requires anti-rotation should be determined at the initial stage of selection.

[0004] The only traditional electric cylinder that can be equipped with an electronic ruler is the anti-torsion electric cylinder. Non-torsion electric cylinders have an additional degree of freedom of rotation. As a result, non-torsion electric cylinders cannot be equipped with electronic rulers, resulting in poor accuracy. Anti-torsion electric cylinders are used in three- and six-degree-of-freedom motion platforms. Due to the lack of a rotational degree of freedom, the choice of articulated parts is limited. Non-torsion electric cylinders have a rich selection of articulated parts on three- and six-degree-of-freedom platforms, but their own rotation cannot be used to install electronic rulers, resulting in poor motion accuracy. Utility Model Content

[0005] Purpose of the utility model: In view of the above shortcomings, the utility model provides a universal structure for connecting an electric cylinder and an electronic ruler to solve the above problems existing in the prior art.

[0006] Technical solution: A universal structure for connecting an electric cylinder and an electronic ruler, comprising an electric cylinder assembly, a balancing electric cylinder guide rod rotating assembly mounted on the electric cylinder assembly, and an electronic ruler assembly connected between the electric cylinder assembly and the balancing electric cylinder guide rod rotating assembly.

[0007] Wherein, the electric cylinder assembly includes an electric cylinder barrel, an electric cylinder guide rod, an electric cylinder upper end cover and an upper U fork.

[0008] The upper end cover of the electric cylinder is installed on the end of the electric cylinder barrel, the electric cylinder guide rod is arranged on the inner side of the electric cylinder barrel and is slidably connected to the upper end cover of the electric cylinder, and the upper U fork is connected to one end of the electric cylinder guide rod close to the upper end cover of the electric cylinder.

[0009] The balancing electric cylinder guide rod rotating assembly comprises a balancing rotating bearing seat, an upper deep groove ball bearing, a hole retaining ring and a connecting screw.

[0010] In which, the balanced rotating bearing seat is arranged at the connection between the electric cylinder guide rod and the upper U fork, and the upper deep groove ball bearing is installed between the balanced rotating bearing seat, the electric cylinder guide rod and the upper U fork, and is used for the electric cylinder guide rod and the upper U fork to be rotatably connected to the balanced rotating bearing seat. The hole retaining spring is installed between the electric cylinder guide rod and the balanced rotating bearing seat, and is used to limit the upper deep groove ball bearing.

[0011] In a further embodiment, the balancing electric cylinder guide rod rotation assembly further includes a linear bearing seat and a balancing rod.

[0012] The linear bearing seat is installed on the outer wall of the cylinder barrel of the electric cylinder. The end of the balance rod is connected to the balance rotation bearing seat through the connecting screw. The balance rod is slidably connected to the linear bearing seat.

[0013] In a further embodiment, the electronic ruler assembly includes an electronic ruler and an electronic ruler pull rod.

[0014] The electronic ruler is mounted on the outer wall of the cylinder barrel of the electric cylinder, the electronic ruler pull rod is threadedly connected to the electronic ruler, and the electronic ruler pull rod is connected to the balanced rotating bearing seat by screws.

[0015] In a further embodiment, the electric cylinder assembly further includes a ball screw, a lower end cover of the electric cylinder, a piston, a screw nut and a lower deep groove ball bearing.

[0016] The ball screw is arranged on the inner side of the cylinder barrel of the electric cylinder, the lower end cover of the electric cylinder is connected to the end of the cylinder barrel of the electric cylinder away from the upper end cover of the electric cylinder, the screw nut is cooperatively connected to the ball screw, the piston is arranged between the screw nut and the electric cylinder guide rod, the lower deep groove ball bearing is installed between the lower end cover of the electric cylinder and the ball screw, and is used for the ball screw to be rotatably connected to the lower end cover of the electric cylinder. The rotation of the ball screw pushes the screw nut to move, which is used to drive the electric cylinder guide rod to move.

[0017] In a further embodiment, the electric cylinder assembly further includes a synchronous wheel box, a servo motor, a synchronous wheel and a synchronous belt.

[0018] The synchronous wheel box is connected to the end of the lower end cover of the electric cylinder away from the cylinder barrel of the electric cylinder. The servo motor is installed on the synchronous wheel box and is located on one side of the cylinder barrel of the electric cylinder. The synchronous belt is installed on the driving end of the servo motor and the end of the ball screw. The synchronous wheel is installed on the synchronous belt. The servo motor drives the synchronous wheel, and the ball screw is driven to rotate through the synchronous belt.

[0019] In a further embodiment, the electric cylinder assembly further includes a lower U fork mounted on the synchronous wheel box, and the lower U fork is arranged corresponding to the upper U fork.

[0020] Beneficial effect: The utility model discloses a universal structure for connecting an electric cylinder and an electronic ruler. By arranging a balanced electric cylinder guide rod rotating assembly, the electronic ruler can be installed not only on an anti-torsion electric cylinder, but also on a non-anti-torsion electric cylinder. This solves the dilemma that the non-anti-torsion electric cylinder has poor motion accuracy in a three- or six-degree-of-freedom platform and cannot be installed with an electronic ruler, and makes the structural design of the electronic ruler installed on the two electric cylinders consistent. At the same time, arranging a high-precision electronic ruler to be installed in conjunction with the electric cylinder can improve the sensitivity of the electric cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the utility model as a whole.

[0022] Figure 2 It is a schematic cross-sectional structural diagram of the entire utility model.

[0023] Figure 3 It is a schematic cross-sectional structural diagram of the utility model from another perspective.

[0024] Figure 4 It is a schematic diagram of part of the structure of the utility model.

[0025] The reference numerals in the figure are: 1. Electric cylinder assembly; 101. Electric cylinder cylinder; 102. Electric cylinder guide rod; 103. Ball screw; 104. Electric cylinder upper end cover; 105. Electric cylinder lower end cover; 106. Upper U fork; 107. Piston; 108. Screw nut; 109. Synchronous wheel box; 110. Servo motor; 111. Lower deep groove ball bearing; 112. Synchronous wheel; 113. Lower U fork; 114. Synchronous belt; 2. Balancing electric cylinder guide rod rotating assembly; 201. Balancing rotating bearing seat; 202. Linear bearing seat; 203. Balancing rod; 204. Upper deep groove ball bearing; 205. Hole retaining ring; 206. Connecting screw; 3. Electronic ruler assembly; 301. Electronic ruler; 302. Electronic ruler pull rod. DETAILED DESCRIPTION

[0026] In the following description, numerous specific details are provided to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features known in the art are not described to avoid confusion with the present invention.

[0027] The applicant believes that the existing non-torsion-proof electric cylinder has one more degree of freedom of rotation than the anti-torsion electric cylinder, which makes it impossible to install an electronic ruler, which easily leads to problems such as poor accuracy. At the same time, the anti-torsion electric cylinder needs to move up and down, and there is a clearance fit between the electric cylinder piston and the anti-torsion bar, which causes the electric cylinder guide rod and the electric cylinder barrel to rotate relative to each other during the movement of the electric cylinder. The rotation will cause the electronic ruler pull rod to rotate as well, causing the displacement of the electronic ruler to be inconsistent with the actual displacement of the electric cylinder, resulting in measurement errors and reduced electric cylinder accuracy.

[0028] To this end, the applicant proposes a universal structure for connecting an electric cylinder with an electronic ruler, such as Figures 1-4 As shown, it includes an electric cylinder assembly 1, a balancing electric cylinder guide rod rotating assembly 2 installed on the electric cylinder assembly 1, and an electronic ruler assembly 3 connected between the electric cylinder assembly 1 and the balancing electric cylinder guide rod rotating assembly 2.

[0029] like Figures 1-4 As shown, the electric cylinder assembly 1 includes an electric cylinder barrel 101, an electric cylinder guide rod 102, a ball screw 103, an electric cylinder upper end cover 104, an electric cylinder lower end cover 105, an upper U fork 106, a piston 107, a screw nut 108, a synchronous wheel box 109, a servo motor 110, a lower deep groove ball bearing 111, a synchronous wheel 112, a lower U fork 113 and a synchronous belt 114.

[0030] Among them, the upper end cover 104 of the electric cylinder is installed at the end of the electric cylinder cylinder 101, the electric cylinder guide rod 102 is arranged on the inner side of the electric cylinder cylinder 101 and is slidably connected to the upper end cover 104 of the electric cylinder, the upper U fork 106 is connected to the end of the electric cylinder guide rod 102 close to the upper end cover 104 of the electric cylinder, the ball screw 103 is arranged on the inner side of the electric cylinder cylinder 101, the lower end cover 105 of the electric cylinder is connected to the end of the electric cylinder cylinder 101 away from the upper end cover 104 of the electric cylinder, the screw nut 108 is matched with the ball screw 103, the piston 107 is arranged between the screw nut 108 and the electric cylinder guide rod 102, and the lower deep groove ball bearing 111 is installed between the lower end cover 105 of the electric cylinder and the ball screw 103, for the ball screw 103 and the lower end cover of the electric cylinder 105 is rotated and connected, the ball screw 103 rotates and pushes the screw nut 108 to move, which is used to drive the electric cylinder guide rod 102 to move, and the synchronous wheel box 109 is connected to the end of the electric cylinder lower end cover 105 away from the electric cylinder cylinder barrel 101. The servo motor 110 is installed on the synchronous wheel box 109 and is located on one side of the electric cylinder cylinder barrel 101. The synchronous belt 114 is installed on the driving end of the servo motor 110 and the end of the ball screw 103. The synchronous wheel 112 is installed on the synchronous belt 114. The servo motor 110 drives the synchronous wheel 112, and drives the ball screw 103 to rotate through the synchronous belt 114. The lower U fork 113 is installed on the synchronous wheel box 109, and the lower U fork 113 is set corresponding to the upper U fork 106.

[0031] like Figures 1-4As shown, the balancing electric cylinder guide rod rotating assembly 2 includes a balancing rotating bearing seat 201, a linear bearing seat 202, a balancing rod 203, an upper deep groove ball bearing 204, a hole retaining ring 205 and a connecting screw 206.

[0032] Among them, the balanced rotating bearing seat 201 is arranged at the connection between the electric cylinder guide rod 102 and the upper U fork 106, and the upper deep groove ball bearing 204 is installed between the balanced rotating bearing seat 201 and the electric cylinder guide rod 102 and the upper U fork 106, and is used for the electric cylinder guide rod 102 and the upper U fork 106 to rotate with the balanced rotating bearing seat 201. The hole retaining spring 205 is installed between the electric cylinder guide rod 102 and the balanced rotating bearing seat 201, and is used to limit the upper deep groove ball bearing 204. The linear bearing seat 202 is installed on the outer wall of the electric cylinder cylinder 101, and the end of the balance rod 203 is connected to the balanced rotating bearing seat 201 through the connecting screw 206, and the balance rod 203 is slidably connected to the linear bearing seat 202.

[0033] like Figure 1 As shown, the electronic ruler assembly 3 includes an electronic ruler 301 and an electronic ruler pull rod 302 .

[0034] The electronic ruler 301 is mounted on the outer wall of the electric cylinder barrel 101 , the electronic ruler pull rod 302 is threadedly connected to the electronic ruler 301 , and the electronic ruler pull rod 302 is connected to the balanced rotating bearing seat 201 via screws.

[0035] In this application, the electronic ruler 301 is installed on the side wall of the electric cylinder barrel 101 and is connected with a threaded structure. The upper deep groove ball bearing 204 and the electric cylinder guide rod 102 are tightly fitted, and the upper deep groove ball bearing 204 and the balanced rotating bearing seat 201 are tightly fitted and have a hole for limiting the position with a retaining ring 205. The electronic ruler pull rod 302 and the balanced rotating bearing seat 201 are screwed, and the electronic ruler pull rod 302 and the electronic ruler 301 are threadedly connected. The linear bearing seat 202 is fixed on the side wall of the electric cylinder barrel 101 and is threadedly connected. The balance rod 203 or the linear optical axis is threadedly connected to the balanced rotating bearing seat 201.

[0036] During use, when the electric cylinder guide rod 102 extends and retracts, it can drive the electronic ruler pull rod 302 and the balance rod 203 to extend and retract together. The balance rod 203 can only move in a straight line under the constraint of the linear bearing seat 202. If the electric cylinder guide rod 102 rotates, since the balance rod 203 can only move in a straight line and the balance rod 203 and the balance rotating bearing seat 201 maintain a fixed relationship, the upper deep groove ball bearing 204 rotates at this time, which will not cause the electronic ruler assembly 3 to rotate, thereby improving the movement accuracy of the electric cylinder.

[0037] The present application provides a balanced electric cylinder guide rod rotation assembly 2, so that the electronic ruler assembly 3 can be installed not only on the anti-torsion electric cylinder, but also on the non-anti-torsion electric cylinder, solving the problem of poor motion accuracy of the non-anti-torsion electric cylinder in three- and six-degree-of-freedom platforms and the inability to install the electronic ruler assembly 3. At the same time, the non-anti-torsion electric cylinder can rotate 360 ​​degrees around the axis of the electric cylinder guide rod 102, and the anti-torsion electric cylinder cannot rotate significantly due to the notch on the piston 107 and the anti-torsion strip. The setting of the present application allows the electronic ruler assembly 3 to be installed on the anti-torsion electric cylinder and the non-anti-torsion electric cylinder to achieve consistency in shape and structure. In addition, the universal structure of using the anti-torsion electric cylinder and the non-anti-torsion electric cylinder to connect the electronic ruler assembly 3 will not require the selection of a single hinge due to the characteristics of the electric cylinder itself during the construction of the three- and six-degree-of-freedom motion platform, so that the design will not be constrained.

[0038] Specifically, the anti-torsion electric cylinder needs to move up and down, and there is a clearance fit between the piston 107 and the anti-torsion bar, which causes the electric cylinder guide rod 102 and the electric cylinder barrel 101 to rotate coaxially relative to each other during the movement of the electric cylinder. The rotation will cause the electronic ruler pull rod 302 to rotate as well, causing the displacement of the electronic ruler component 3 to be inconsistent with the actual displacement of the electric cylinder, resulting in measurement errors and reduced electric cylinder accuracy. By setting the components of the present application, there will be no situation where the displacement of the electronic ruler component 3 is inconsistent with the actual displacement of the electric cylinder. The electric cylinder guide rod 102 can rotate 360 ​​degrees around the axis. When rotating around the axis, the balance rod 203 is constrained by the linear bearing seat 202 and can only move up and down, while the balance rotating bearing seat 201 remains stationary, and the bearing inside the balance rotating bearing seat 201 rotates due to the rotation of the electric cylinder guide rod 102, so that the balance rotating bearing seat 201 is stationary, while pulling the electronic ruler pull rod 302 to move up and down, thereby improving the accuracy of the electric cylinder.

[0039] For a non-torsion-proof electric cylinder, the electric cylinder guide rod 102 can rotate 360 ​​degrees around the axis. When rotating around the axis, the balance rod 203 is constrained by the linear bearing seat 202 and can only move up and down, while keeping the balanced rotating bearing seat 201 stationary. The bearing inside the balanced rotating bearing seat 201 rotates due to the rotation of the electric cylinder guide rod 102, making the balanced rotating bearing seat 201 stationary. At the same time, the electronic ruler pull rod 302 is pulled up and down, thereby improving the accuracy of the electric cylinder.

[0040] As above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be interpreted as limiting the present invention itself. Various changes in form and details may be made without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A universal structure for connecting an electric cylinder and an electronic ruler, characterized in that: It includes an electric cylinder assembly, a balancing electric cylinder guide rod rotating assembly installed on the electric cylinder assembly, and an electronic ruler assembly connected between the electric cylinder assembly and the balancing electric cylinder guide rod rotating assembly; The electric cylinder assembly includes an electric cylinder barrel, an electric cylinder guide rod, an electric cylinder upper end cover and an upper U fork; The upper end cover of the electric cylinder is installed at the end of the cylinder barrel of the electric cylinder; The electric cylinder guide rod is arranged inside the cylinder barrel of the electric cylinder and is slidably connected to the upper end cover of the electric cylinder; The upper U fork is connected to one end of the electric cylinder guide rod close to the upper end cover of the electric cylinder; The balancing electric cylinder guide rod rotating assembly includes a balancing rotating bearing seat, an upper deep groove ball bearing, a hole retaining ring and a connecting screw; The balancing rotating bearing seat is arranged at the connection between the electric cylinder guide rod and the upper U fork; The upper deep groove ball bearing is installed between the balanced rotating bearing seat, the electric cylinder guide rod and the upper U fork, and is used for the electric cylinder guide rod and the upper U fork to be rotatably connected to the balanced rotating bearing seat; The hole retaining spring is installed between the electric cylinder guide rod and the balanced rotating bearing seat, and is used to limit the upper deep groove ball bearing.

2. The universal structure for connecting an electric cylinder and an electronic ruler according to claim 1, characterized in that: The balancing electric cylinder guide rod rotating assembly also includes a linear bearing seat and a balancing rod; The linear bearing seat is mounted on the outer wall of the cylinder barrel of the electric cylinder; The end of the balancing rod is connected to the balancing rotating bearing seat through the connecting screw, and the balancing rod is slidably connected to the linear bearing seat.

3. The universal structure for connecting an electric cylinder and an electronic ruler according to claim 1, characterized in that: The electronic ruler assembly includes an electronic ruler and an electronic ruler pull rod; The electronic ruler is installed on the outer wall of the cylinder barrel of the electric cylinder; The electronic ruler pull rod is threadedly connected to the electronic ruler, and the electronic ruler pull rod is connected to the balanced rotating bearing seat through screws.

4. The universal structure for connecting an electric cylinder and an electronic ruler according to claim 1, characterized in that: The electric cylinder assembly also includes a ball screw, a lower end cover of the electric cylinder, a piston, a screw nut and a lower deep groove ball bearing; The ball screw is arranged inside the cylinder barrel of the electric cylinder; The lower end cover of the electric cylinder is connected to an end of the electric cylinder barrel away from the upper end cover of the electric cylinder; The screw nut is connected to the ball screw in a cooperative manner; The piston is arranged between the screw nut and the electric cylinder guide rod; The lower deep groove ball bearing is installed between the lower end cover of the electric cylinder and the ball screw, and is used for the ball screw to be rotatably connected to the lower end cover of the electric cylinder; The ball screw rotates to push the screw nut to move, which is used to drive the electric cylinder guide rod to move.

5. The universal structure for connecting an electric cylinder and an electronic ruler according to claim 4, characterized in that: The electric cylinder assembly also includes a synchronous wheel box, a servo motor, a synchronous wheel and a synchronous belt; The synchronous wheel box is connected to the end of the lower end cover of the electric cylinder away from the cylinder barrel of the electric cylinder; The servo motor is mounted on the synchronous wheel box and is located on one side of the cylinder barrel of the electric cylinder; The synchronous belt is installed on the driving end of the servo motor and the end of the ball screw; The synchronous wheel is installed on the synchronous belt; The servo motor drives the synchronous wheel, which drives the ball screw to rotate through the synchronous belt.

6. The universal structure for connecting an electric cylinder and an electronic ruler according to claim 5, characterized in that: The electric cylinder assembly further includes a lower U fork mounted on the synchronous wheel box, and the lower U fork is arranged corresponding to the upper U fork.

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