Small-size large-thrust electric cylinder
By introducing a front thrust bearing and a rear thrust bearing into the electric cylinder, and fixing the lead screw to the inner hole of the rotor, combined with a composite bearing, the problem of insufficient thrust in traditional electric cylinders with small size is solved, achieving the effect of greater thrust in a smaller size.
Patent Information
- Application Number
- CN202423272811.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Traditional electric cylinders are difficult to achieve high thrust in small sizes, and the drive motor is prone to damage, takes up a lot of space, and has low integration.
The drive motor is equipped with front and rear thrust bearings, which are fixed to the rotor inner hole by lead screws. Combined with composite bearings and guide rail structure, it can achieve large thrust in small size.
It improves the axial load-bearing capacity of the drive motor, shortens the axial dimension, makes it suitable for smaller installation spaces, and achieves higher integration.
Smart Images
Figure CN223758100U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to an electric cylinder, especially a small-size large-thrust electric cylinder. BACKGROUND
[0002] The electric cylinder can convert the rotary motion output by the motor into linear motion and is widely applied to industrial equipment and automation equipment. With the continuous development of automation, the demand for small-size large-thrust electric cylinders with high integration is increasing. The driving motor in the traditional electric cylinder cannot bear a large axial load, is prone to damage to internal parts, and reduces the service life of the motor. Meanwhile, the axial design occupies a large space and has low integration.
[0003] Therefore, how to realize a small-size large-thrust electric cylinder becomes a technical problem to be solved. SUMMARY
[0004] The utility model discloses a small-size large-thrust electric cylinder, which can realize greater thrust under smaller size.
[0005] The utility model discloses a small-size large-thrust electric cylinder, which can realize greater thrust under smaller size.
[0006] According to one aspect of the utility model, a small-size large-thrust electric cylinder is provided, which comprises a driving motor, a lead screw, a nut, a push rod, a guide rail, a sliding block, a front thrust bearing and a rear thrust bearing.
[0007] As a preferred technical scheme, the lead screw provides pre-tightening force for the front thrust bearing and the rear thrust bearing.
[0008] As a preferred technical scheme, the lead screw is directly fixed and installed with the inner hole of the rotor.
[0009] As a preferred technical scheme, the width W of the electric cylinder is not more than 20 mm.
[0010] As a preferred technical scheme, the height H of the electric cylinder is not more than 110 mm.
[0011] As a preferred technical scheme, the electric cylinder further comprises a composite bearing installed on the push rod.
[0012] As a preferred technical scheme, the front flange is installed on the outer side of the composite bearing.
[0013] As a preferred technical scheme, the electric cylinder further comprises a cylinder barrel.
[0014] Compared with the prior art, the utility model has the advantages of:
[0015] 1) The utility model discloses before and after the front end cover of the driving motor is equipped with the front thrust bearing and the rear thrust bearing, so that the driving motor can bear high axial load, and compared with the same size electric cylinder, the requirement of large thrust is realized.
[0016] 2) The utility model discloses that the screw rod is directly fixed and installed in the inner hole of the rotor, and the axial dimension is shortened, so that the electric cylinder can be applied to smaller installation space. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is the sectional view structural schematic drawing of the utility model;
[0018] Figure 2 It is the side view structural schematic drawing of the utility model
[0019] Wherein 1 is the rotor, 2 is the rear thrust bearing, 3 is the front thrust bearing, 4 is the nut, 5 is the push rod, 6 is the cylinder, 7 is the composite bearing, 8 is the front flange, 9 is the guide rail, 10 is the sliding block, 11 is the screw rod, 12 is the front end cover, 13 is the deep groove ball bearing, 14 is the stator, W is the electric cylinder width, H is the electric cylinder height. DETAILED DESCRIPTION
[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the utility model.
[0021] As Figure 1 The utility model discloses a small size big thrust electric cylinder, the utility model discloses drive motor, screw rod 11, nut 4, cylinder 6, push rod 5, guide rail 9, sliding block 10, front flange 8, front thrust bearing 3, rear thrust bearing 2, drive motor includes rotor 1, stator 14, front end cover 12, deep groove ball bearing 13, the front end cover 12 is equipped with front thrust bearing 3 and rear thrust bearing 2 before and after, the screw rod 11 is fixed in the rotor 1 in drive motor, and pre-tightening force is provided for front thrust bearing 3 and rear thrust bearing 2, the nut 4 is installed on the screw rod 11, the push rod 5 is fixed on the nut 4 and sliding block 10 simultaneously, the sliding block is installed on the guide rail, and the electric cylinder width W is not more than 20mm, and the height H is not more than 110mm.
[0022] The driving motor drives the screw rod 11 to rotate, the push rod 5 fixed on the sliding block 10 and the nut 4 converts the rotary motion into linear motion, and the front thrust bearing 3 and the rear thrust bearing 2 can bear large axial force when the push rod 5 reciprocates.
[0023] The front end cover 12 of the driving motor is provided with the front thrust bearing 3 and the rear thrust bearing 2, the screw rod 11 is fixed on the rotor 1 in the driving motor, and the front thrust bearing 3 and the rear thrust bearing 2 are provided with pre-tightening force, the nut 4 is installed on the screw rod 11, the push rod 5 is fixed on the nut 4 and the sliding block 10 at the same time, the sliding block 10 is installed on the guide rail 9, and the electric cylinder further comprises a front flange 8, a cylinder barrel 6 and a composite bearing 7.
[0024] In actual operation, the driving motor drives the screw rod to provide rotary motion, the nut fixed on the push rod converts the rotary motion into reciprocating linear motion when the screw rod moves, and the axial force borne by the push rod when doing axial reciprocating motion is transmitted to the front thrust bearing and the rear thrust bearing, so that the electric cylinder can bear large axial load.
[0025] The above is only a specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the utility model, and these modifications or replacements should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of claims.
Claims
1. A small size and large thrust electric cylinder, characterized by, It comprises a driving motor, a screw rod (11), a nut (4), a push rod (5), a guide rail (9), a sliding block (10), a front thrust bearing (3) and a rear thrust bearing (2), the driving motor comprises a rotor (1), a stator (14) and a front end cover (12), the front end cover (12) is assembled with the front thrust bearing (3) and the rear thrust bearing (2) from front to back, the screw rod (11) is fixed on the rotor (1), the nut (4) is installed on the screw rod (11), the push rod (5) is fixed with the nut (4) and the sliding block (10) respectively, and the sliding block (10) is installed on the guide rail (9).
2. The small-size large-thrust electric cylinder according to claim 1, characterized in that, The screw rod (11) provides pre-tightening force for the front thrust bearing (3) and the rear thrust bearing (2).
3. The small size and large thrust electric cylinder according to claim 1, wherein The screw rod (11) is directly fixed and installed in the inner hole of the rotor (1).
4. The small-size large-thrust electric cylinder according to claim 1, characterized in that, The width W of the electric cylinder is not more than 20 mm.
5. The small size and large thrust force electric cylinder according to claim 1, wherein The height H of the electric cylinder is not more than 110 mm.
6. The small size and large thrust force electric cylinder according to claim 1, wherein The electric cylinder further comprises a composite bearing (7) installed on the push rod (5).
7. The small-size large-thrust electric cylinder according to claim 6, characterized in that, The front flange (8) is installed on the outer side of the composite bearing (7).
8. The small size and large thrust force electric cylinder according to claim 1, wherein The electric cylinder further comprises a cylinder barrel (6).