Direct connection type high-thrust electric cylinder

Abstract

The utility model relates to a direct connection type large thrust electric cylinder, which comprises a motor, a speed reducer, a coupler, a lead screw nut pair, a locking block, a thrust ball bearing, a deep groove ball bearing and a piston push rod, the lead screw nut pair comprises a lead screw and a nut, the lead screw sequentially penetrates through the deep groove ball bearing, the thrust ball bearing and the locking block and then is connected with the speed reducer through the coupler, and the piston push rod is connected with the deep groove ball bearing. One end of the piston push rod is connected with a load, and the other end of the piston push rod is connected with a nut in the lever nut pair. Compared with the prior art, the utility model has the advantages of high thrust, high-density installation and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to an electric cylinder, especially a direct connection type large thrust electric cylinder. BACKGROUND

[0002] The electric cylinder is a linear motion execution mechanism mainly composed of a motor and a screw rod, and has the advantages of fast response, accurate stroke control and accurate thrust control. The large thrust electric cylinder usually increases a speed reducer between the motor and the screw rod to increase the thrust of the electric cylinder, and is generally divided into two forms: a folding type electric cylinder and a direct connection type electric cylinder. The folding type electric cylinder usually increases a parallel shaft reducer or a transmission belt between the motor and the screw rod to increase the thrust, but the parallel shaft reducer occupies a large space, so the folding type electric cylinder requires a large installation space, which is not conducive to high-density installation.

[0003] The direct connection type electric cylinder usually installs a speed reducer in a straight line between the motor and the screw rod to increase the thrust, which is slightly smaller than the folding type electric cylinder, but the internal structure of the existing direct connection type electric cylinder with a speed reducer is not compact enough, the cylinder barrel usually occupies a large volume, and the electric cylinder is usually installed by screw connection, which is not convenient for installation and disassembly.

[0004] After searching the Chinese patent publication No. CN214480096U, a servo electric cylinder is disclosed, which specifically discloses a servo motor and an electric cylinder body, a speed reducer is connected between the servo motor and the electric cylinder body, the servo motor, the speed reducer and the electric cylinder body are installed in a straight line, a lead screw is arranged in the electric cylinder body, the servo motor is connected with the lead screw through the speed reducer, one end of the lead screw is fixedly connected with the output shaft of the speed reducer through a shaft coupling, the other end of the lead screw extends out of the electric cylinder body, a sliding block is arranged on the lead screw, a sleeve and a push block connected to the sleeve are arranged, the sliding block moves along the direction of the lead screw, one end of the sliding block abuts one end of the push block, a connecting nut is connected to the output end of the sleeve, and a screw rod is embedded in the connecting nut. However, the patent has the following defects: first, the structure is not compact enough, the installation occupies a large space, and the thrust adjustment density is low; second, the electric cylinder cannot be disassembled from one side of the speed reducer by screw connection. UTILITY MODEL CONTENTS

[0005] The utility model aims at overcoming the defects of the prior art and provides a direct connection type large thrust electric cylinder.

[0006] The utility model can achieve the purpose by the following technical solutions:

[0007] According to one aspect of the utility model, a kind of direct connection type big thrust electric cylinder is provided, including motor, speed reducer, shaft coupling, screw-nut pair, locking block, thrust ball bearing, deep groove ball bearing and piston push rod, the screw-nut pair includes screw and nut, the screw sequentially passes deep groove ball bearing, thrust ball bearing and locking block, is connected with speed reducer by shaft coupling, the speed reducer is connected with motor, one end of the piston push rod is connected with load, and the other end is connected with the nut in screw-nut pair.

[0008] As a preferred technical solution, the electric cylinder further comprises two bearing spacers, which are respectively installed at both ends of the thrust ball bearing.

[0009] As a preferred technical solution, the electric cylinder further comprises an adapter seat, which is provided with a boss for bearing the tension and compression force received by the screw-nut pair and facilitating the installation of the thrust ball bearing.

[0010] As a preferred technical solution, the deep groove ball bearing is in close proximity to the screw part of the screw-nut pair.

[0011] As a preferred technical solution, the electric cylinder further comprises a cylinder barrel and a guide block, the guide block is installed in the cylinder barrel, and the guide block is connected with the nut in the screw-nut pair.

[0012] As a preferred technical solution, the cylinder barrel and the adapter seat are both provided with a relief groove.

[0013] As a preferred technical solution, the electric cylinder further comprises a front flange and a sliding bearing, the piston push rod sequentially passes through the front flange and the sliding bearing and is connected with the nut in the screw-nut pair.

[0014] As a preferred technical solution, the front flange is provided with four threaded through holes.

[0015] As a preferred technical solution, the piston push rod is provided with a conical pin hole for connecting with the load.

[0016] As a preferred technical solution, the adapter seat, the speed reducer and the electric cylinder have consistent width dimensions and are smaller than the width of the cylinder barrel and the front flange.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] 1) The length and width dimensions of the electric cylinder are smaller, and large thrust and high density installation can be realized.

[0019] 2) The front flange of the electric cylinder is provided with four through holes, and the electric cylinder mounting screw can be installed in two directions.

[0020] 3) The cylinder barrel and the adapter seat are both provided with a relief groove, and in combination with the four through holes of the front flange, the electric cylinder can be disassembled and assembled from the motor side.

[0021] 4) The piston push rod of this utility model is equipped with a tapered pin hole structure, which makes the installation more accurate and more secure. Attached Figure Description

[0022] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0023] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 3 This is a schematic diagram of the main structure of this utility model.

[0025] Wherein 101 is the motor, 102 is the reducer, 103 is the coupling, 104 is the lead screw and nut pair, 105 is the locking block, 106 is the thrust ball bearing, 107 is the bearing pad, 108 is the deep groove ball bearing, 109 is the adapter, 110 is the cylinder, 111 is the guide block, 112 is the front flange, 113 is the sliding bearing, 114 is the piston rod, 115 is the clearance groove structure, 116 is the threaded through hole, and W is the width of the front flange. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present utility model.

[0027] like Figure 1 As shown, a direct-drive high-thrust electric cylinder includes a motor 101, a reducer 102, a coupling 103, a lead screw and nut assembly 104, a locking block 105, a thrust ball bearing 106, a deep groove ball bearing 108, and a piston rod 114. The lead screw and nut assembly 104 includes a lead screw and a nut. The lead screw passes sequentially through the deep groove ball bearing 108, the thrust ball bearing 106, and the locking block 105, and is then connected to the reducer 102 via the coupling 103. The reducer 102 is connected to the motor 101. One end of the piston rod 114 is connected to the load, and the other end is connected to the nut in the lead screw and nut assembly 104. This electric cylinder can achieve high thrust and high-density installation.

[0028] The electric cylinder also includes two bearing washers 107, respectively installed at both ends of the thrust ball bearing 106. The electric cylinder also includes an adapter 109, which has a boss for bearing the tensile and compressive forces on the lead screw nut assembly 104 and facilitating the installation of the thrust ball bearing 106. The electric cylinder also includes a cylinder barrel 110 and a guide block 111. The guide block 111 is installed inside the cylinder barrel 110 and is connected to the nut in the lead screw nut assembly 104, sliding within the cylinder barrel 110. The electric cylinder also includes a front flange 112 and a sliding bearing 113. The piston rod 114 passes through the front flange 112 and the sliding bearing 113 in sequence before connecting to the nut in the lead screw nut assembly 104.

[0029] The deep groove ball bearing 108 is located close to the lead screw portion of the lead screw nut assembly 104, facilitating the assembly of the electric cylinder while effectively balancing the hole depths on both sides of the adapter boss, thus simplifying the machining of the adapter. The piston push rod features a tapered pin hole structure, resulting in higher installation accuracy and greater stability.

[0030] like Figure 2 As shown, the adapter 109, reducer 102, and motor 101 have the same width, which is smaller than the width of cylinder 110 and front flange 112. Both cylinder 110 and adapter 109 are provided with clearance grooves 115 to facilitate the insertion and removal of the electric cylinder with a wrench from the motor side. Figure 3 As shown, the front flange 112 has a small width W, which reduces the space required for installation. The front flange 112 has four threaded through holes, allowing the mounting screws to be installed in both directions.

[0031] Both the cylinder and the adapter are equipped with clearance grooves, and the front flange has 4 through holes, allowing the electric cylinder to be installed and removed from the motor side.

[0032] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A direct-drive high-thrust electric cylinder, comprising a motor (101), a reducer (102), a coupling (103), a lead screw and nut pair (104), a locking block (105), a thrust ball bearing (106), a deep groove ball bearing (108), and a piston rod (114), characterized in that, The lead screw and nut assembly (104) includes a lead screw and a nut. The lead screw passes through a deep groove ball bearing (108), a thrust ball bearing (106), and a locking block (105) in sequence, and is then connected to a reducer (102) via a coupling (103). The reducer (102) is connected to a motor (101). One end of the piston push rod (114) is connected to the load, and the other end is connected to the nut in the lead screw and nut assembly (104).

2. The direct-drive high-thrust electric cylinder according to claim 1, characterized in that, The electric cylinder also includes two bearing washers (107), which are respectively installed at both ends of the thrust ball bearing (106).

3. The direct-drive high-thrust electric cylinder according to claim 1, characterized in that, The electric cylinder also includes an adapter (109) with a boss for bearing the tensile and compressive forces on the lead screw nut pair (104) and for facilitating the installation of the thrust ball bearing (106).

4. The direct-drive high-thrust electric cylinder according to claim 1, characterized in that, The deep groove ball bearing (108) is located close to the lead screw portion of the lead screw nut pair (104).

5. The direct-drive high-thrust electric cylinder according to claim 3, characterized in that, The electric cylinder also includes a cylinder barrel (110) and a guide block (111), the guide block (111) being installed inside the cylinder barrel (110) and connected to a nut in the lever nut pair (104).

6. The direct-drive high-thrust electric cylinder according to claim 5, characterized in that, Both the cylinder (110) and the adapter (109) are provided with clearance grooves.

7. The direct-drive high-thrust electric cylinder according to claim 5, characterized in that, The electric cylinder also includes a front flange (112) and a sliding bearing (113). The piston rod (114) passes through the front flange (112) and the sliding bearing (113) in sequence and is connected to the nut in the lever nut pair (104).

8. A direct-drive high-thrust electric cylinder according to claim 7, characterized in that, The front flange (112) is provided with four threaded through holes.

9. A direct-drive high-thrust electric cylinder according to claim 1, characterized in that, The piston rod (114) is provided with a tapered pin hole for connection with the load.

10. A direct-drive high-thrust electric cylinder according to claim 7, characterized in that, The adapter (109), reducer (102) and electric cylinder have the same width dimensions, and are smaller than the width of the cylinder barrel (110) and the front flange (112).

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