High-integration-level linear driver

Abstract

The invention discloses a high-integration-level linear driver which comprises a front end cover, a pull pressure sensor is arranged in the center of the front end cover, a head shell is arranged on the front portion of the pull pressure sensor, a head connecting piece is arranged at the front end of the pull pressure sensor, a front end shell is arranged on the rear side of the front end cover, and a common-speed connecting piece is arranged in the front end shell. A torque sensor, a torque sensor mounting plate, an angular contact ball bearing and an encoder mounting plate are sequentially arranged on the outer wall of the common-speed connecting piece from front to back, a frameless torque motor is arranged in the rear end cover shell, a nut is arranged in the frameless torque motor, a transmission assembly is arranged in the nut, and a lead screw is arranged in the transmission assembly. The rear end cover is arranged on the rear side of the rear end cover shell. The frameless torque motor and the reverse planetary roller lead screw are adopted, so that the system size is remarkably reduced, and the flexibility of spatial layout is improved. The high efficiency and high torque density characteristics of the frameless torque motor are combined with the compact structure of the planetary roller screw, so that the driving mode is more efficient and accurate.

Description

Technical Field

[0001] The invention relates to the technical field of linear drive devices, in particular to a highly integrated linear drive. Background Art

[0002] As a key component in the field of modern industrial automation and precision control, linear actuators are widely used for their excellent performance advantages. They can convert the rotary motion of the motor into linear motion, provide precise position control and powerful thrust output. However, although ordinary linear drives perform well in many applications, they still have some limitations. Linear actuators usually use a combination of motor and ball screw, which is often bulky in terms of space requirements. In reciprocating motion applications, the space requirements are large, making it difficult for traditional designs to adapt to space-constrained occasions. For example, the motor assembly is usually connected to one end of the screw, which not only increases the overall length of the actuator unit, but also limits its application capabilities in compact environments; although the ball screw is favored for its precise linear motion, its performance may be limited in applications that require high speed or high acceleration, and it cannot meet the needs of fast movement or fast stopping, limiting its use in high-performance applications; in addition, ordinary linear drives require additional sensors and complex wiring, which increases the complexity of the system and installation costs. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the above technical defects and provide a highly integrated linear driver.

[0004] In order to solve the above problems, the technical solution of the present invention is as follows:

[0005] A front end cover, wherein a tension and pressure sensor is provided at the center of the front end cover, a head shell is sleeved on the front part of the tension and pressure sensor, and a head connector is provided at the front end of the tension and pressure sensor;

[0006] A front end housing, the front end housing is fixedly connected to the rear side of the front end cover by screws, a common speed connector is provided inside the front end housing, and a torque sensor, a torque sensor mounting plate, an angular contact ball bearing and an encoder mounting plate are sleeved on the outer wall of the common speed connector in sequence from front to back;

[0007] A rear end cover shell, wherein the rear end cover shell is fixedly connected to the rear side of the front end shell by screws, a frameless torque motor is arranged inside the rear end cover shell, a nut is passed through the interior of the frameless torque motor, a transmission assembly is arranged inside the nut, and a lead screw is arranged inside the transmission assembly;

[0008] The rear end cover is fixedly connected to the rear side of the rear end cover shell by screws, and a copper sleeve is also provided at the center of the interior of the rear end cover.

[0009] Furthermore, the rear end of the common-speed connector is fixedly connected to a nut via a screw, and an angular contact ball bearing is sleeved on the rear side of the nut.

[0010] Furthermore, the two fixing plates are respectively sleeved on the front end outer wall of the screw rod, a plurality of rollers are respectively meshed and connected with the nuts, and a plurality of rollers are respectively meshed and connected with the screw rod.

[0011] Furthermore, an elastic retaining ring is provided on the front side of the torque sensor, and the elastic retaining ring is clamped on the outer wall of the common speed connecting piece.

[0012] Furthermore, the transmission assembly includes a fixed plate, a fixed shaft and rollers. There are two fixed plates, and a number of equidistant fixed shafts are passed through the opposite sides of the two fixed plates. Both ends of the fixed shafts are respectively connected to the fixed plate bearings, and the outer walls of the fixed shafts are respectively sleeved with rollers.

[0013] Furthermore, the rear end of the screw rod passes through a copper sleeve and is connected with a tail connector.

[0014] The advantages of the present invention compared with the prior art are:

[0015] 1. The present invention provides a highly integrated linear drive, which adopts a frameless torque motor and a reverse planetary roller screw. This design significantly reduces the system volume and improves the flexibility of spatial layout. The high efficiency and high torque density characteristics of the frameless torque motor, combined with the compact structure of the planetary roller screw, make the driving method more efficient and precise. In addition, the design of the integrated torque sensor and tension and pressure sensor not only improves the integration of the system, but also enhances the real-time monitoring capability of thrust and torque. This integrated solution simplifies the system wiring and reduces external interference, thereby improving the overall control accuracy and reliability. Through these innovative designs, the linear drive of this article has achieved significant improvements in accuracy, efficiency and ease of maintenance, meeting the needs of modern industry for high-performance linear motion systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the internal structure of the present invention.

[0017] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0018] As shown in the figure: 1. Front end cover; 2. Head shell; 3. Head connector; 4. Tension and pressure sensor; 5. Elastic retaining ring; 6. Common speed connector; 7. Front end shell; 8. Transmission assembly; 801. Fixed plate; 802. Fixed shaft; 803. Roller; 9. Frameless torque motor; 10. Angular contact ball bearing; 11. Copper sleeve; 12. Screw; 13. Tail connector; 14. Rear end cover; 15. Nut; 16. Rear end cover shell; 17. Encoder mounting plate; 18. Torque sensor mounting plate; 19. Torque sensor. DETAILED DESCRIPTION

[0019] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices consistent with some aspects of the present disclosure as detailed in the appended claims.

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] Embodiment 1:

[0022] like Figure 1 to Figure 2 As shown, the present embodiment proposes a highly integrated linear actuator, including a front end cover 1, a front end shell 7, a rear end cover shell 16 and a rear end cover 14, a tension pressure sensor 4 is inserted at the center of the front end cover 1, a head shell 2 is sleeved on the front part of the tension pressure sensor 4, a head connector 3 is provided at the front end of the tension pressure sensor 4, the front end shell 7 is fixedly connected to the rear side of the front end cover 1 by screws, a common speed connector 6 is inserted inside the front end shell 7, a torque sensor 19, a torque sensor mounting plate 18, an angular contact ball bearing 10 and an encoder mounting plate 17 are sleeved on the outer wall of the common speed connector 6 from front to back, the rear end cover shell 16 is fixedly connected to the rear side of the front end shell 7 by screws, a frameless torque motor 9 is provided inside the rear end cover shell 16, a nut 15 is inserted inside the frameless torque motor 9, a transmission assembly 8 is provided inside the nut 15, a screw 12 is provided inside the transmission assembly 8, the rear end cover 14 is fixedly connected to the rear side of the rear end cover shell 16 by screws, and a copper sleeve 11 is also inserted at the center of the rear end cover 14.

[0023] Embodiment 2:

[0024] The scheme in Example 1 is further introduced below in combination with a specific working method, as described below for details: an elastic retaining ring 5 is provided on the front side of the torque sensor 19, and the elastic retaining ring 5 is clamped on the outer wall of the common-speed connector 6. The rear end of the common-speed connector 6 is fixedly connected to the nut 15 by a screw, and an angular contact ball bearing 10 is sleeved on the rear side of the nut 15.

[0025] Embodiment 3:

[0026] The scheme in Example 2 is further introduced below in combination with the specific working method, as described below for details: the transmission assembly 8 includes a fixed disk 801, a fixed shaft 802 and a roller 803. There are two fixed disks 801, and a plurality of equidistant fixed shafts 802 are passed through the opposite sides of the two fixed disks 801. The two ends of the plurality of fixed shafts 802 are respectively connected to the bearings of the fixed disks 801, and the outer walls of the plurality of fixed shafts 802 are respectively sleeved with rollers 803. The two fixed disks 801 are respectively sleeved on the front end outer walls of the screw rod 12, and the plurality of rollers 803 are respectively meshed and connected with the nuts 15, and the plurality of rollers 803 are respectively meshed and connected with the screw rod 12. The rear end of the screw rod 12 passes through the copper sleeve 11 and is sleeved with a tail connector 13.

[0027] The reverse planetary roller screw is composed of a screw 12, a roller 803 and a nut 15. The roller 803 is meshed with the screw 12 and the nut 15 at the same time. The frameless torque motor 9 is sleeved on the nut 15 to provide power for the rotation of the nut 15. There is an angular contact ball bearing 10 at the right end of the screw 12 and the left and right of the common speed connector 6. The common speed connector 6 is connected to the nut 15 by bolts. The common speed connector 6 is provided with an encoder mounting plate 17, a torque sensor mounting plate 18 and a torque sensor 19. The torque sensor mounting plate 18 is connected to the common speed connector 6 by screws. The left end of the torque sensor 19 is limited by an elastic retaining ring 5. There is an end cover at each of the front and rear ends before driving, which are the front end cover 1 and the rear end cover 14 respectively. The tension and pressure sensor 4 is connected to the front end cover 1, and the outside is wrapped with a head shell 2, and is connected to the front end cover 1 by bolts; the head and tail are provided with a head connector 3 and a tail connector 13 respectively.

[0028] It is composed of a frameless torque motor 9, which drives the rotor to rotate by energizing the frameless torque motor 9, eliminating the limitations of the traditional motor frame, making the entire power source more compact and lightweight. The screw 12, roller 803 and nut 15 form a reverse planetary roller screw, which converts the rotation of the nut 15 into the linear motion of the screw 12. This design effectively improves the transmission efficiency, and due to the planetary arrangement of the roller 803, a higher load-bearing capacity and smoother movement are achieved. The reverse planetary roller screw has a smaller volume and higher rigidity, which is suitable for occasions with limited space and high precision requirements. The encoder is arranged on the encoder mounting plate 17. The encoder is used to accurately measure the position and speed of the rotor and provide the necessary feedback signal for the closed-loop control system. The torque sensor 19 monitors the output torque in real time to ensure that the drive operates within a safe and effective working range. The tension and pressure sensor 4 is used to detect the external force acting on the drive to provide additional safety protection for the system. The phase, output torque and force conditions of the rotor system are fully detected, providing the drive with self-diagnosis and predictive maintenance functions, which helps to discover potential problems in advance and reduce downtime.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0031] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A highly integrated linear driver, characterized in that: include: A front end cover (1), wherein a tension and pressure sensor (4) is provided at the center of the front end cover (1), a head shell (2) is sleeved on the front of the tension and pressure sensor (4), and a head connector (3) is provided at the front end of the tension and pressure sensor (4); A front end housing (7), the front end housing (7) being fixedly connected to the rear side of the front end cover (1) by means of screws, a common speed connection piece (6) being provided inside the front end housing (7), and a torque sensor (19), a torque sensor mounting plate (18), an angular contact ball bearing (10) and an encoder mounting plate (17) being sleeved on the outer wall of the common speed connection piece (6) in sequence from front to back; A rear end cover shell (16), the rear end cover shell (16) is fixedly connected to the rear side of the front end shell (7) by means of screws, a frameless torque motor (9) is arranged inside the rear end cover shell (16), a nut (15) is passed through the interior of the frameless torque motor (9), a transmission assembly (8) is arranged inside the nut (15), and a screw rod (12) is arranged inside the transmission assembly (8); The rear end cover (14) is fixedly connected to the rear side of the rear end cover shell (16) by screws, and a copper sleeve (11) is also provided at the center of the interior of the rear end cover (14).

2. A highly integrated linear driver according to claim 1, characterized in that: An elastic retaining ring (5) is provided on the front side of the torque sensor (19), and the elastic retaining ring (5) is clamped on the outer wall of the common speed connecting member (6).

3. A highly integrated linear driver according to claim 2, characterized in that: The rear end of the common speed connection member (6) is fixedly connected to a nut (15) via a screw, and an angular contact ball bearing (10) is sleeved on the rear side of the nut (15).

4. The highly integrated linear driver according to claim 3, characterized in that: The transmission assembly (8) comprises a fixed disk (801), a fixed shaft (802) and a roller (803). There are two fixed disks (801). A plurality of equidistant fixed shafts (802) are provided on opposite sides of the two fixed disks (801). Both ends of the plurality of fixed shafts (802) are respectively connected to bearings of the fixed disks (801). The outer walls of the plurality of fixed shafts (802) are respectively sleeved with rollers (803).

5. The highly integrated linear driver according to claim 4, characterized in that: The two fixing plates (801) are respectively sleeved on the front end outer wall of the screw rod (12), and a plurality of rollers (803) are respectively meshed and connected with the nut (15), and a plurality of rollers (803) are respectively meshed and connected with the screw rod (12).

6. The highly integrated linear driver according to claim 5, characterized in that: The rear end of the screw rod (12) passes through the copper sleeve (11) and is sleeved with a tail connector (13).

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