Hydraulic cylinder with stroke detection function

Abstract

The utility model discloses a hydraulic cylinder with a stroke detection function. The hydraulic cylinder comprises a cylinder body; the piston is movably arranged in the cylinder body; the output rod is connected with the piston, the output rod is movably arranged on the cylinder body, and part of the output rod extends out of the cylinder body; the tooth condition is connected with the output rod; the mounting seat is connected to the cylinder body; the motor is arranged on the mounting seat, an encoder is arranged in the motor, and an electromagnetic brake is arranged in the motor; and the gear is connected with the motor and is in meshed connection with the tooth condition. In the using process of the cylinder body, the output rod is connected with a load, in the process that the output rod drives the load to move in a reciprocating mode, the gear piece moves along with the output rod so as to drive the gear to rotate, and the encoder is used for measuring the number of rotation turns of the gear so as to obtain the stroke of the output rod. And when the output rod needs to be locked, the electromagnetic brake locks rotation of the gear, so that the gear condition is locked, and the purpose of locking the position of the output rod is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of stroke detection, in particular to a hydraulic cylinder with stroke detection function. BACKGROUND

[0002] The stroke measurement method of the hydraulic cylinder can be divided into external and internal two kinds. The hydraulic cylinder with internal displacement measurement is called stroke sensing hydraulic cylinder. The sensing part of this kind of hydraulic cylinder is in the hydraulic cylinder, and the sensor does not occupy the space outside the hydraulic cylinder and is not afraid of external impact. However, the internal displacement measurement is expensive, difficult to maintain and single function.

[0003] Therefore, it is necessary to provide a hydraulic cylinder with stroke detection function, and the stroke detection structure has multiple functions, which becomes an important technical problem to be solved. CONTENT OF THE PRESENT INVENTION

[0004] The present application provides a hydraulic cylinder with stroke detection function, which aims to solve the problem of expensive internal displacement measurement, difficult to maintain and single function in the prior art.

[0005] To achieve the above-mentioned purpose, the present application provides a hydraulic cylinder with stroke detection function, which comprises: a cylinder body; a piston movably arranged in the cylinder body; an output rod connected to the piston, the output rod movably arranged in the cylinder body and partially extending out of the cylinder body; a tooth condition connected to the output rod; a mounting seat connected to the cylinder body; a motor arranged in the mounting seat, the motor being provided with an encoder and an electromagnetic brake; and a gear connected to the motor and engaged with the tooth condition.

[0006] In some embodiments, the cylinder body comprises: a front end cover; a front connecting cover connected to the bottom end of the front end cover, the mounting seat being fixedly installed on the front connecting cover; a cylinder barrel, one end of the cylinder barrel being connected to the front connecting cover, the piston being movably arranged in the cylinder barrel; a rear connecting cover, the other end of the cylinder barrel being connected to the rear connecting cover; and a rear end cover arranged at the bottom end of the rear connecting cover.

[0007] In some embodiments, the tooth condition is provided with two tooth conditions arranged on both sides of the cylinder body, and further comprises: a first connecting arm connected to the tooth condition; a connecting half ring arranged at one end of the first connecting arm away from the tooth condition; a connecting lug arranged on the connecting half ring; a connecting ring groove provided on the tooth condition and adapted to the connecting half ring; and a locking member for locking the connecting lug on the two connecting half rings.

[0008] In some embodiments, the locking member comprises: a threaded hole provided on the connecting lug; a screw rod penetrating through the threaded holes on the two connecting lugs; and a locking nut arranged on the screw rod and abutting against one connecting lug.

[0009] In some embodiments, further comprising: a guide rail, the mounting base is provided with a guide rail; a guide rail groove, the tooth condition is provided with a matched guide rail groove.

[0010] In some embodiments, further comprising: a second connecting arm, the mounting base is connected to the front connecting cover through the second connecting arm.

[0011] The technical scheme of the present application provides a hydraulic cylinder with stroke detection function, comprising: a cylinder body; a piston movably arranged in the cylinder body; an output rod connected to the piston, the output rod being movably arranged in the cylinder body and partially extending out of the cylinder body; a tooth condition connected to the output rod; a mounting base connected to the cylinder body; a motor arranged in the mounting base, the motor being provided with an encoder and an electromagnetic brake; and a gear connected to the motor and meshingly connected to the tooth condition. In the use of the cylinder body, the output rod is connected to a load, and in the process of driving the load to move reciprocally, the tooth condition moves with the output rod to drive the gear to rotate, and the encoder is used to measure the number of rotations of the gear to obtain the stroke of the output rod. When the output rod needs to be locked, the electromagnetic brake locks the rotation of the gear to lock the tooth condition, so as to achieve the purpose of locking the position of the output rod. The locking structure of the cylinder body has multiple functions, and the practicality is enhanced. The stroke detection structure composed of the tooth condition, the gear, the motor and the encoder is easy to maintain, and the economic cost of the stroke detection structure is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0013] Figure 1 It is a sectional view of a hydraulic cylinder with stroke detection function in an embodiment of the present application;

[0014] Figure 2 It is a top view of a hydraulic cylinder with stroke detection function in an embodiment of the present application;

[0015] Figure 3 It is a local enlarged view of part A in 2;

[0016] Figure 4 It is a local enlarged view of part B in 2.

[0017] In the figure: rear end cover 1, rear connecting cover 2, piston 3, cylinder 4, output rod 5, connecting ring 51, mounting seat 6, front connecting cover 7, front end cover 8, gear 9, tooth condition 10, first connecting arm 11, second connecting arm 12, guide rail groove 13, guide rail 14, locking nut 15, screw rod 16, connecting lug 17. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0019] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0020] It should also be noted that when an element is referred to as being “fixed to” or “set on” another element, it can be directly on the other element or there can be a middle element. When an element is referred to as being “connected” to another element, it can be directly connected to the other element or there can be a middle element.

[0021] In addition, the description of “first”, “second” and the like in the present application is only for the purpose of description and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as “first” and “second” can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the fact that a person of ordinary skill in the art can realize it, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection claimed by the present application.

[0022] Referring to Figure 1 and Figure 2 As shown in the figure, the present application provides a hydraulic cylinder with stroke detection function, comprising: a cylinder body; a piston 3 movably arranged in the cylinder body; an output rod 5 connected to the piston 3, the output rod 5 movably arranged in the cylinder body and partially extending out of the cylinder body; a tooth condition 10 connected to the output rod 5; a mounting seat 6 connected to the cylinder body; a motor arranged in the mounting seat 6, the motor being provided with an encoder and an electromagnetic brake; a gear 9 connected to the motor, the gear 9 being engaged with the tooth condition 10.

[0023] The cylinder body is a structural basis of the hydraulic cylinder with stroke detection function, and other structures of the hydraulic cylinder with stroke detection function are directly or indirectly connected to the cylinder body. The output rod 5 is an output component of the cylinder body, and the end thereof is used to connect a load. The toothed condition 10, the gear 9, the motor and the encoder constitute a stroke detection structure. The toothed condition 10 is connected to the output rod 5. When the output rod 5 drives the load to move, the toothed condition 10 moves with the output rod 5, thereby driving the gear 9 to rotate. The encoder is used to measure the number of rotations of the gear 9, thereby obtaining the stroke of the output rod 5. The electromagnetic brake is a structure for locking the stroke. When the output rod 5 needs to be locked, the electromagnetic brake locks the rotation of the gear 9, thereby locking the toothed condition 10, so as to achieve the purpose of locking the position of the output rod 5.

[0024] Specifically, in the use of the cylinder body, the output rod 5 is connected to a load. When the output rod 5 drives the load to reciprocate, the toothed condition 10 moves with the output rod 5, thereby driving the gear 9 to rotate. The encoder is used to measure the number of rotations of the gear 9, thereby obtaining the stroke of the output rod 5. When the output rod 5 needs to be locked, the electromagnetic brake locks the rotation of the gear 9, thereby locking the toothed condition 10, so as to achieve the purpose of locking the position of the output rod 5. The locking structure of the cylinder body has multiple functions, and the practicality is enhanced. The stroke detection structure constituted by the toothed condition 10, the gear 9, the motor and the encoder is easy to maintain, and the economic cost of the stroke detection structure is reduced.

[0025] Referring to Figure 1 In some embodiments, the cylinder body comprises: a front end cover 8, the first oil port is arranged on the front end cover 8, the output rod 5 penetrates through the front end cover 8, and a sealing element is arranged between the front end cover 8 and the output rod 5; a front connecting cover 7 connected to the bottom end of the front end cover 8, a mounting seat 6 fixedly installed on the front connecting cover 7, the front connecting cover 7 is connected to the mounting seat 6 by bolts, and a sealing element is arranged between the front end cover 8 and the front connecting cover 7; a cylinder barrel 4 connected to the front connecting cover 7 at one end, the cylinder barrel 4 is welded to the front connecting cover 7, a piston 3 movably arranged in the cylinder barrel 4, a sealing element arranged between the piston 3 and the cylinder barrel 4, and a sealing element arranged between the piston 3 and the piston rod; a rear connecting cover 2 connected to the other end of the cylinder barrel 4, the rear connecting cover 2 is welded to the cylinder barrel 4; a rear end cover 1 arranged at the bottom end of the rear connecting cover 2, the rear connecting cover 2 is connected to the rear end cover 1 by bolts, a sealing element arranged between the rear connecting cover 2 and the rear end cover 1, a connecting element arranged on the rear end cover 1, the cylinder body is installed on an external structure through the connecting element, and a second oil port arranged on the rear end cover 1.

[0026] Referring to Figure 1 , Figure 2 and Figure 4As shown in the drawings, in some embodiments, the tooth condition 10 is provided with two, two tooth conditions 10 are arranged on both sides of the cylinder body, further comprising: a first connecting arm 11, the first connecting arm 11 connects the tooth condition 10; the first connecting arm 11 is connected to the tooth condition 10 by welding; a connecting half ring, the connecting half ring is arranged at one end of the first connecting arm 11 away from the tooth condition 10; the connecting half rings of the two tooth conditions 10 enclose to form a ring member; a connecting lug 17, the connecting lug 17 is arranged on the connecting half ring; the connecting lug 17 is arranged on both sides of the connecting half ring, when the connecting half rings of the two tooth conditions 10 enclose to form a ring member, the connecting lugs 17 on the two connecting half rings just abut. A connecting ring 51 slot is arranged on the tooth condition 10 to match the connecting half ring; the inner diameter of the ring member formed by the connecting half rings of the two tooth conditions 10 is equal to the inner diameter of the connecting ring 51 slot; a locking member, the locking member is used to lock the connecting lugs 17 on the two connecting half rings. The connecting lugs 17 on the connecting half rings of the two tooth conditions 10 are connected together through the locking member, so that the two connecting half rings are stably enclosed on the connecting ring 51 slot, realizing the connection of the tooth condition 10 and the output rod 5. By arranging two tooth conditions 10, the stroke detection of the cylinder body is more accurate. When the strokes output by the two encoders are different, the relevant staff needs to be notified for maintenance. And the arrangement of the two tooth conditions 10 can also better lock the output rod 5 when needed.

[0027] Referring to Figure 1 , Figure 2 and Figure 4 As shown in the drawings, in some embodiments, the locking member comprises: a threaded hole, a threaded hole is arranged on the connecting lug 17; a threaded rod 16, the threaded rod 16 passes through the threaded holes on the two connecting lugs 17; the end of the threaded rod 16 abuts against one connecting lug 17; a locking nut 15, the locking nut 15 is arranged on the threaded rod 16 and abuts against one connecting lug 17. The locking nut 15 abuts against the other connecting lug 17, thereby completing the locking of the two connecting lugs 17.

[0028] Referring to Figure 1 , Figure 2 and Figure 3 As shown in the drawings, in some embodiments, further comprising: a guide rail 14, a guide rail 14 is arranged on the mounting seat 6; a guide rail slot 13, a guide rail slot 13 is arranged on the tooth condition 10 to match. Through the cooperation of the guide rail 14 and the guide rail slot 13, the movement of the tooth condition 10 is guided, so that the movement of the tooth condition 10 is more stable.

[0029] Referring to Figure 2 As shown in the drawings, in some embodiments, further comprising: a second connecting arm 12, the mounting seat 6 is connected to the front connecting cover 7 through the second connecting arm 12. The second connecting arm 12 is connected to the front connecting cover 7 by welding.

[0030] The above merely provides part or preferred embodiments of the present application, and neither the text nor the drawings can limit the scope of protection of the present application. Any equivalent structure variations made according to the contents of the present application and drawings, or direct / indirect application in other related technical fields shall fall within the scope of protection of the present application.

Claims

1. A hydraulic cylinder having a stroke detection function, characterized by comprising: The utility model relates to a kind of cylinder-piston mechanism, including: Cylinder; Piston (3), the piston (3) is movably arranged in the cylinder; Output rod (5), the output rod (5) is connected the piston (3), the output rod (5) is movably arranged in the cylinder, and part extends out the cylinder; Gear condition (10), the gear condition (10) is connected the output rod (5); Mounting seat (6), the mounting seat (6) is connected to the cylinder; Motor, the motor is arranged in the mounting seat (6), the motor is provided with encoder, the motor is provided with electromagnetic brake; Gear (9), the gear (9) is connected the motor, the gear (9) is engagedly connected the gear condition (10).

2. The hydraulic cylinder with stroke detection function according to claim 1, characterized in that, The cylinder includes: Front end cover (8); Front connecting cover (7), the front connecting cover (7) is connected to the bottom end of the front end cover (8), and the mounting seat (6) is fixedly installed on the front connecting cover (7); Cylinder barrel (4), one end of the cylinder barrel (4) is connected to the front connecting cover (7), and the piston (3) is movably arranged in the cylinder barrel (4); Rear connecting cover (2), the other end of the cylinder barrel (4) is connected to the rear connecting cover (2); Rear end cover (1), the rear end cover (1) is arranged at the bottom end of the rear connecting cover (2).

3. The hydraulic cylinder with stroke detection function according to claim 1, characterized in that, The gear condition (10) is provided with two, two gear conditions (10) are arranged on both sides of the cylinder, further including: First connecting arm (11), the first connecting arm (11) is connected the gear condition (10); Connecting half ring, the connecting half ring is arranged at the end of the first connecting arm (11) away from the gear condition (10); Connecting lug (17), the connecting lug (17) is arranged on the connecting half ring; Connecting ring (51) slot, the gear condition (10) is provided with the connecting ring (51) slot that is adapted to the connecting half ring; Locking part, the locking part is used to lock the connecting lug (17) on two connecting half rings.

4. The hydraulic cylinder with stroke detection function according to claim 3, characterized in that, The locking part includes: Threaded hole, the threaded hole is arranged on the connecting lug (17); Screw rod (16), the screw rod (16) passes through the threaded hole on two connecting lug (17); Locking nut (15), the locking nut (15) is arranged on the screw rod (16), and abuts one connecting lug (17).

5. The hydraulic cylinder with stroke detection function according to claim 1, characterized in that, Further including: Guide rail (14), the guide rail (14) is arranged on the mounting seat (6); Guide rail slot (13), the gear condition (10) is provided with the matched guide rail slot (13).

6. The hydraulic cylinder with stroke detection function according to claim 2, characterized in that, Further including: Second connecting arm (12), the mounting seat (6) is connected to the front connecting cover (7) by the second connecting arm (12).

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