External oil injection integrated electric cylinder

Abstract

The utility model discloses an external oil injection integrated electric cylinder which comprises a ball screw, a motor, a cylinder body, a piston assembly and the like. The motor is installed at one end of the external oil injection integrated electric cylinder and connected with the ball screw through the coupler, the ball nut and the piston are integrated, and an internal thread is machined in the piston and matched with the ball screw to move. The ball screw is driven by the motor to rotate, so that the integrated piston can do reciprocating rectilinear motion on the ball screw, and therefore the piston rod is driven; oil injection holes are formed in the cylinder body and the integrated piston, and grease can be injected into the integrated piston from the outside of the electric cylinder under the condition that components of the electric cylinder are not disassembled. The ball nut and the piston are integrated, the design of the electric cylinder is simplified, the installation convenience and the rigidity of the electric cylinder are improved, and an external oil injection structure is adopted, so that the electric cylinder is easier and faster to maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission devices, in particular to an external oil injection integrated electric cylinder. Background Art

[0002] The electric cylinders widely available in the market currently require ball nuts to be installed on the piston end face or inside, and the piston, ball nut and ball screw are used together. In terms of oil filling and maintenance, external oil filling cannot be achieved, and the electric cylinder components need to be disassembled for maintenance. A small number of electric cylinders have oil filling holes processed in the cylinder body, but the grease can only be introduced into the piston rod, and cannot be injected into the ball screw and ball nut, making oil filling and maintenance difficult.

[0003] There is room for improvement in the rigidity, oil filling and maintenance convenience, and assembly difficulty of the above-mentioned electric cylinder structure, and a new transmission structure is needed to solve the above problems. Summary of the invention

[0004] The utility model relates to an external oil injection integrated electric cylinder, which adopts an integrated piston and an external oil injection structure, integrates the piston and the ball nut, and the motor drives the ball screw to rotate through a coupling, and the ball screw drives the integrated piston and the piston rod locked and fixed on the integrated piston to move. The utility model has the characteristics of good rigidity, simple and quick assembly, and larger effective stroke.

[0005] The utility model discloses an external oil injection integrated electric cylinder comprising a ball screw, a cylinder body, an integrated piston, a piston rod and other parts.

[0006] In this utility model, the ball nut and the piston are integrated, and the internal thread is processed inside the piston. The ball nut can be matched with the ball screw to complete the linear motion without assembling the ball nut. The integrated piston simplifies the assembly of the electric cylinder, saves the nut assembly time, improves the installation convenience and reduces the assembly difficulty, and effectively improves the rigidity of the electric cylinder.

[0007] As an optimized design, the electric cylinder body and the integrated piston are processed with oil filling holes. There is no need to disassemble the electric cylinder. Grease can be introduced into the integrated piston from the outside of the cylinder body. The position of the integrated piston oil filling hole is opposite to the internal thread. Grease can directly enter the internal thread to fully lubricate the ball screw and the integrated piston, making the maintenance of the electric cylinder simpler and faster. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic diagram of the external structure of the external oil injection integrated electric cylinder of the utility model;

[0009] Figure 2 Figures a and b are cross-sectional structural diagrams of the external oil injection integrated electric cylinder of the utility model;

[0010] Figure 3These are schematic diagrams a and b of the external structure of the integrated piston of the utility model;

[0011] Figure 4 This is a schematic diagram of the external oil injection structure of the utility model;

[0012] Figure 5 It is a schematic diagram of the cross-sectional structure of the integrated piston of the utility model.

[0013] The main parts are marked as follows: 1, ball screw; 2, cylinder; 3, integrated piston; 4, piston rod; 5, motor; 6, motor seat; 7, coupling; 8, bearing fixing seat; 9, angular contact bearing; 10, locking nut; 11, magnetic seat; 12, magnetic ring; 13, guide block; 14, front cover; 15, joint; 16, cylinder oil filling hole; 17, integrated piston oil filling hole; 18, integrated piston internal thread; DETAILED DESCRIPTION

[0014] The structure and features of the present invention will be described below, and component numbers will be used for explanation throughout the description.

[0015] Figure 1 It is an external oil injection integrated electric cylinder, such as Figure 2 As shown in a and b in the figure, the utility model mainly comprises a ball screw (1), a cylinder body (2), an integrated piston (3) and a piston rod (4). The integrated piston (3) is assembled on the ball screw (1), and an angular contact bearing (9) and a locking nut (10) are assembled at the front end (close to the motor side) of the ball screw (1) and fixed to the bearing fixing seat (8). Figure 3 As shown in a and b in the figure, the two ends of the integrated piston (3) are processed with locking threads, one end is used to lock and fix the magnetic seat (11) and the magnetic ring (12), and the other end is used to lock and fix the piston rod (4). The piston rod (4) is sleeved on the ball screw (1), and the motor seat (6), the bearing fixing seat (8) (the ball screw is already assembled), the cylinder body (2), and the front cover (14) are locked and fixed in sequence. The motor (5) is installed on the motor seat (6) and drives the ball screw (1) to rotate through the coupling (7). When the motor drives the ball screw (1) to rotate, the movement of the ball screw and the integrated piston will be converted into the advancement and contraction movement of the piston rod (4). The second end of the piston rod (4) is installed with a joint (15), and the advancement and contraction movement of the piston rod (4) can drive the load movement through the joint (15).

[0016] like Figure 4As shown, both the cylinder body and the integrated piston are processed with oil injection holes, and the cylinder body oil injection hole (16) and the integrated piston oil injection hole (17) are located opposite to each other. Grease can be introduced from the cylinder body oil injection hole to the integrated piston oil injection hole without disassembling the electric cylinder components until the integrated piston internal thread (18). The external oil injection structure of the electric cylinder makes the maintenance of the electric cylinder simpler and faster, and the external oil injection structure of the utility model can directly inject grease from the outside of the electric cylinder body into the integrated piston internal thread (18), so that the grease can fully lubricate the ball screw (1) and the integrated piston (3).

[0017] like Figure 5 As shown, the utility model integrates the piston and the ball nut, processes and grinds the internal thread inside the piston, and does not need to install the ball nut. Under the drive of the motor, the integrated piston can perform reciprocating linear motion in the direction of the ball screw. The integrated structure of the piston and the ball nut can improve the rigidity of the electric cylinder. The structure without the ball nut reduces the overall size of the integrated piston and increases the effective stroke of the electric cylinder. The integrated piston (3) simplifies the structure of the electric cylinder, simplifies the assembly of the electric cylinder, and improves the assembly efficiency.

[0018] The internal thread (18) of the integrated piston is rough-machined and ground inside the integrated piston (3) according to the use requirements to meet any lead requirements.

[0019] At least two guide blocks (13) are mounted on the integrated piston to guide the pushing and contracting movement of the piston rod (4).

[0020] The above is the implementation method of the present invention. The present invention not only improves the convenience of electric cylinder installation, but also simplifies the structure of the electric cylinder. The external oil injection structure makes the maintenance of the electric cylinder more convenient and can increase the service life. The integrated piston improves the rigidity of the electric cylinder and increases the effective stroke, which can achieve the purpose of the present invention.

[0021] The content described above is one of the feasible implementation cases of the present utility model and cannot completely limit the implementation scope of the present utility model. In other words, the content that is transformed in expression and packaged in language according to the present utility model is within the implementation scope of the present utility model.

Claims

1. An external oil injection integrated electric cylinder, characterized in that: It comprises a ball screw (1), a motor (5), a cylinder body (2), an integrated piston (3) and a piston rod (4); The motor (5) and the motor seat (6) are mounted on one end of the cylinder body (2), and the motor (5) is connected to the ball screw (1) via a coupling. An internal thread is machined inside the piston, and the ball nut and the piston are integrated. A magnetic seat (11) and a magnetic ring (12) are mounted on one end of the integrated piston (3) close to the motor, and a piston rod (4) is mounted on the other end. Locking threads are machined on both ends of the integrated piston, and the magnetic seat and the piston rod are fixed to the integrated piston via thread locking. When the motor drives the ball screw to rotate, the integrated piston can perform reciprocating linear motion on the ball screw (1), thereby driving the piston rod (4) to enable the piston rod (4) to complete telescopic motion. A joint (15) is mounted on the other end of the piston rod (4), and the joint (15) can drive the load to complete linear motion.

2. The external oil injection integrated electric cylinder according to claim 1, characterized in that: At least two guide blocks (13) are mounted on the integrated piston (3) and are embedded in the cylinder body (2).

3. The external oil injection integrated electric cylinder according to claim 1, characterized in that: The cylinder body (2) is provided with a cylinder body oil filling hole (16), and the integrated piston (3) is provided with an integrated piston oil filling hole (17). The cylinder body oil filling hole (16) and the integrated piston oil filling hole (17) are located opposite to each other. Grease is injected into the cylinder body oil filling hole (16) without removing the cylinder body (2). The grease flows into the integrated piston oil filling hole (17) through the cylinder body oil filling hole (16) and is finally introduced into the integrated piston internal thread (18), thereby completing the oil filling maintenance of the electric cylinder.

4. The external oil injection integrated electric cylinder according to claim 1, characterized in that: The integrated piston (3) integrates the piston and the ball nut into one, and an internal thread is processed inside the piston. The internal thread (18) of the integrated piston can be assembled with a ball so as to realize the movement between the integrated piston (3) and the ball screw, thereby saving the assembly time of the ball nut, improving the installation convenience and reducing the assembly difficulty, and improving the rigidity of the electric cylinder. The integration of the piston and the ball nut can increase the effective stroke of the electric cylinder without changing the external dimensions of the electric cylinder.

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