A servo electric push rod cylinder with large thrust and built-in pressure sensor

Abstract

The present invention discloses a servo electric push rod cylinder with a large thrust and a pressure sensor, comprising: a cylinder body arranged horizontally, the front end of the cylinder body is connected to the rear end of a coupling mounting seat through a pressure sensor, a coupling is arranged in the coupling mounting seat, a ball screw is arranged in the cylinder body, the front end of the ball screw extends to the outside of the cylinder body and is clamped with the rear end of the coupling through bolts on the coupling, and the rear end is threadedly connected with a guide bushing, a screw nut is sleeved on one end of the ball screw located in the cylinder body, a hollow sleeve is sleeved on the screw nut, and the end of the hollow sleeve extends to the outside of the cylinder body to form a closed end; a driving device is connected to the front end of the coupling and drives the screw nut and the hollow sleeve to reciprocate along the axial direction of the ball screw. The present invention optimizes the front and rear end cover structures of the electric push rod cylinder, has a compact structure, a centrally placed pressure sensor, direct and timely data feedback, improved working stability, and reduced noise.

Description

Technical Field

[0001] The invention relates to the technical field of electric push rods, in particular to a servo electric push rod cylinder with a large thrust and a pressure sensor. Background Art

[0002] Due to the complex structure of existing electric push rod cylinders, and the high requirements for parts processing and installation accuracy, workers cannot accurately ensure the installation accuracy during assembly, so that electric push rod cylinders often fail to meet the design and use requirements. Especially in large-thrust electric push rod cylinders, various precision issues cause low stability and high noise. Summary of the invention

[0003] The main technical problem solved by the present invention is to provide a servo electric push rod cylinder with large thrust and built-in pressure sensor, which has compact structure, high working stability and low noise.

[0004] In order to solve the above technical problems, a technical solution adopted by the present invention is: a servo electric push rod cylinder with high thrust and built-in pressure sensor, comprising: a horizontally arranged cylinder body, the front end of the cylinder body is connected to the rear end of the coupling mounting seat through a pressure sensor, a coupling is arranged in the coupling mounting seat, a ball screw is arranged in the cylinder body, the front end of the ball screw extends out of the cylinder body and is threadedly connected to the rear end of the coupling, and the rear end is threadedly connected to the guide bushing, a screw nut is sleeved on one end of the ball screw located in the cylinder body, a hollow sleeve is sleeved on the screw nut, and the end of the hollow sleeve extends out of the cylinder body to form a closed end; a driving device is connected to the front end of the coupling and drives the screw nut and the hollow sleeve to reciprocate along the axial direction of the ball screw.

[0005] In a preferred embodiment of the present invention, a transmission device is provided between the driving device and the coupling mounting seat, and the transmission device is a speed reducer and is mounted on the front end surface of the coupling mounting seat by bolts.

[0006] In a preferred embodiment of the present invention, the cylinder body and the coupling mounting seat are connected to the screw holes on the pressure sensor through a plurality of bolts.

[0007] In a preferred embodiment of the present invention, the hollow sleeve is provided with an internal thread that matches the lead screw nut, and the two form a threaded tight connection.

[0008] In a preferred embodiment of the present invention, an expansion sleeve is sleeved on the ball screw, and the expansion sleeve is fixedly connected to the coupling and abuts against the rear end face of the coupling.

[0009] In a preferred embodiment of the present invention, a locking nut is provided on the ball screw behind the expansion sleeve.

[0010] The beneficial effects of the present invention are as follows: compared with the traditional large-thrust electric push cylinder, the patent optimizes the design of the front and rear end covers, optimizes the original external front and rear end cover structure, makes the structure more compact and reliable, improves concentricity, reduces costs, simplifies assembly steps, and improves production efficiency. At the same time, the central placement of the pressure sensor improves the installation accuracy and use accuracy, improves working stability, reduces noise, and can drive a larger tonnage (10t-20t). BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0012] Figure 1 It is a cross-sectional structural diagram of a servo electric push rod cylinder with a large thrust and a pressure sensor of the present invention;

[0013] Figure 2 The utility model is a schematic diagram of the installation of a servo electric push rod cylinder with a large thrust and a pressure sensor according to the present invention. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] See also Figure 1-2 The servo electric push rod cylinder with a large thrust and a built-in pressure sensor comprises: a cylinder body 1 arranged horizontally, the front end of the cylinder body 1 is connected to the rear end of a coupling mounting seat 3 through a pressure sensor 2, a coupling 4 is arranged in the coupling mounting seat 3, a ball screw 5 is arranged in the cylinder body 1, the front end of the ball screw 5 extends to the outside of the cylinder body and is clamped with the rear end of the coupling 4 through the bolts on the coupling, and the rear end of the ball screw 5 is threadedly connected with a guide bushing 6. A screw nut 7 is sleeved on one end of the ball screw 5 located in the cylinder body, and a hollow sleeve 8 is sleeved on the screw nut, and the end of the hollow sleeve 8 extends to the outside of the cylinder body to form a closed end. Specifically, an internal thread matching the screw nut 7 is provided on the hollow sleeve 8, and the two are tightly connected by thread, which plays a certain supporting role on the ball screw 5, making the structure more stable. Compared with the traditional electric push cylinder, the design of the front and rear end covers is optimized, and the original external front and rear end covers are changed to internal ones, making the structure more compact and reliable.

[0016] The driving device is a motor, and a transmission device is fixedly installed between the driving device and the coupling mounting seat. The transmission device is a reducer 9 and is installed on the front end surface of the coupling mounting seat 3 by bolts. The driving principle of the electric push rod part in this patent is consistent with the traditional electric push rod. The torque is provided by the motor, and the reducer 9 transmits the torque and transmits it to the ball screw 5 through the coupling 4. As the ball screw 5 rotates, the screw nut 7 drives the screw nut 7 and the hollow sleeve 8 connected by threads to move back and forth along the axial direction of the ball screw 5.

[0017] Specifically, the cylinder body 1 and the coupling mounting seat 3 are connected to the screw holes on the pressure sensor 2 through a plurality of bolts, and may also be fixedly connected through other methods such as welding.

[0018] Specifically, when the ball screw 5 moves, the pressure sensor 2 starts to feed back data to the PLC controller after being pressurized, with high detection accuracy and more sensitive response.

[0019] Specifically, an expansion sleeve 12 is sleeved on the ball screw 5, and the expansion sleeve 12 is fixedly connected to the coupling and abuts against the rear end face of the coupling. A locking nut 10 is arranged behind the expansion sleeve 12, and a bearing 11 and a bearing seat are sleeved on the rear side of the locking nut 10. The locking nut and the expansion sleeve play a role in axial positioning of the ball screw.

[0020] The beneficial effects of the high-thrust servo electric push rod cylinder with a built-in pressure sensor of the present invention are as follows: compared with the traditional high-thrust electric push cylinder, the patent optimizes the design of the front and rear end covers, optimizes the original external front and rear end cover structure, makes the structure more compact and reliable, improves concentricity, reduces costs, simplifies assembly steps, and improves production efficiency. At the same time, the central placement of the pressure sensor improves the installation accuracy and use accuracy, improves working stability, reduces noise, and can drive a larger tonnage.

[0021] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A servo electric push rod cylinder with large thrust and built-in pressure sensor, characterized in that: include: The cylinder body is arranged horizontally, and the front end of the cylinder body is connected to the rear end of the coupling mounting seat through a pressure sensor, a coupling is arranged in the coupling mounting seat, and a ball screw is arranged in the cylinder body. The front end of the ball screw extends out of the cylinder body and is threadedly connected to the rear end of the coupling, and the rear end is threadedly connected to a guide bushing. A screw nut is sleeved on one end of the ball screw located in the cylinder body, and a hollow sleeve is sleeved on the screw nut, and the end of the hollow sleeve extends out of the cylinder body to form a closed end; a driving device is connected to the front end of the coupling and drives the screw nut and the hollow sleeve to reciprocate along the axial direction of the ball screw, and a transmission device is arranged between the driving device and the coupling mounting seat, and the transmission device is a reducer and is mounted on the front end surface of the coupling mounting seat by bolts, and an internal thread matching the screw nut is arranged on the hollow sleeve, and the two form a tight thread connection.

2. The servo electric push rod cylinder with large thrust and built-in pressure sensor according to claim 1 is characterized in that: The cylinder body and the coupling mounting seat are connected with the screw holes on the pressure sensor through a plurality of bolts.

3. According to the high-thrust servo electric push rod cylinder with built-in pressure sensor as described in claim 1, it is characterized in that: An expansion sleeve is sleeved on the ball screw, and the expansion sleeve is fixedly connected to the coupling and abuts against the rear end surface of the coupling.

4. According to claim 3, a servo electric push rod cylinder with large thrust and built-in pressure sensor is characterized in that: A locking nut is arranged on the ball screw at the rear of the expansion sleeve.

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