Fixed shaft linear motor integrated with photoelectric sensor

Abstract

The utility model discloses a fixed shaft linear motor integrated with a photoelectric sensor, which is characterized in that a stator assembly is positioned in a motor shell and is fixed with the motor shell, two ends of a rotor assembly are respectively fixed with a bearing, the bearing is positioned in the motor shell and is fixed with the motor shell, a nut is fixed with the rotor assembly, and a screw rod is in threaded connection with the nut. The output shaft is fixed with the screw rod, one end of the motor shell is provided with an assembly hole, the assembly hole is internally provided with a bulge, the circumferential surface of the output shaft is provided with a combination groove which is arranged along the axial direction of the output shaft, the assembly hole is internally provided with a bulge which is in sliding fit with the combination groove, the connecting bracket is fixed at the other end of the motor shell, and the mounting bracket is fixed with the connecting bracket. A receding groove for receding during linear motion of the screw is formed in the mounting support, and a photoelectric transmitter and a photoelectric receiver are mounted on the two opposite groove wall faces of the receding groove correspondingly. The photoelectric sensor is additionally arranged at the rear end of the motor to control the stroke position of the motor screw.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and particularly relates to a fixed-axis linear motor integrated with a photoelectric sensor. Background Art

[0002] The fixed-axis linear motor is an effective linear transmission mechanism, which can reduce devices such as slide rails and pulleys in the linear transmission mechanism, greatly facilitating the use of customers and being widely used in linear motion solutions.

[0003] The internal structure of the motor uses a screw and nut drive structure to directly convert the rotational motion of the nut into the linear motion of the screw, simplifying the structural design of the motor. Due to its stable quality, small volume, large thrust, and multiple step size specifications available, it has a wide range of market applications.

[0004] When using a fixed-axis linear motor as a driver in industrial production, it is usually necessary to control the stroke of the screw in the fixed-axis linear motor. For example, the fixed-axis linear motor drives the driven component to move linearly to a specified position, and the stroke is usually controlled by, for example, a travel switch or a photoelectric switch. For example, when the driven component touches the travel switch or is detected by the photoelectric switch, the driven component moves linearly to the specified position. After receiving the signal from the travel switch or the photoelectric switch, the industrial control computer controls the motor to stop working.

[0005] For the above control method, the travel switch or the photoelectric switch and the fixed-axis linear motor are usually separated, that is, the travel switch or the photoelectric switch is not integrated on the fixed-axis linear motor. After the user purchases the fixed-axis linear motor, it is necessary to separately purchase the travel switch or the photoelectric switch, which causes inconvenience to the user when assembling the motor and requires a separate design of a mounting seat to fix the photoelectric sensor on the production line. Content of the Utility Model

[0006] The utility model provides a fixed-axis linear motor integrated with a photoelectric sensor. The utility model adds a photoelectric sensor at the rear end of the motor to control the stroke position of the motor screw.

[0007] The technical solution to solve the above technical problems is as follows:

[0008] The fixed-axis linear motor integrated with a photoelectric sensor includes a fixed-axis linear motor body, which consists of a motor housing, a stator assembly, a rotor assembly, bearings, a nut, a screw rod, and an output shaft. The stator assembly is located inside the motor housing and fixed to the motor housing. The two ends of the rotor assembly are respectively fixed to the bearings, which are located inside the motor housing and fixed to the motor housing. The nut is fixed to the rotor assembly, the screw rod is threadedly connected to the nut, and the output shaft is fixed to the screw rod. One end of the motor housing is provided with an assembly hole, and a protrusion is provided in this assembly hole. A coupling groove arranged along the axial direction of the output shaft is provided on the circumferential surface of the output shaft, and the protrusion in the assembly hole is in sliding fit with the coupling groove. It also includes a connection bracket, a mounting bracket, a photoelectric emitter, and a photoelectric receiver. The connection bracket is fixed to the other end of the motor housing, the mounting bracket is fixed to the connection bracket, and a relief groove for making way for the linear movement of the screw rod is provided on the mounting bracket. The photoelectric emitter and the photoelectric receiver are respectively installed on two opposite groove walls of the relief groove.

[0009] Further, the motor housing includes a sleeve and a housing body. The housing body includes an intermediate body and first and second extension bodies provided at both ends of the intermediate body. The outer diameters of the first and second extension bodies are smaller than that of the intermediate body. One end of the sleeve is located inside the first extension body and fixed to one of the bearings. The assembly hole is a through hole on the sleeve, and the connection bracket is fitted with the second extension body.

[0010] Further, the connection bracket includes a ring sleeve. A first connection seat is provided on the circumferential surface of the ring sleeve. The ring sleeve is sleeved on the motor housing and fixed to the motor housing, and the mounting bracket is fixed to the first connection seat.

[0011] Further, the mounting bracket includes a main body, a first connecting arm, a second connecting arm, and a second connection seat. After one ends of the first connecting arm and the second connecting arm are respectively fixed to the main body, a relief groove is formed between the main body and the first and second connecting arms. The photoelectric emitter is installed on the first connecting arm, and the photoelectric receiver is installed on the second connecting arm.

[0012] Since the output shaft is in spline fit with the motor housing, the output shaft cannot rotate. And the screw rod is fixed integrally with the output shaft, so the screw rod also cannot rotate. The nut, the screw rod, the output shaft, and the motor housing constitute a lead screw mechanism. When the fixed-axis linear motor works, the rotor assembly rotates, the rotor assembly drives the nut to rotate, the screw rod moves linearly, and the output shaft follows the screw rod of the output shaft to move linearly. When the screw rod enters the relief groove and blocks the signal sent by the photoelectric emitter received by the photoelectric receiver, the fixed-axis linear motor works normally. When the screw rod extends until it leaves the relief groove, the photoelectric receiver receives the signal sent by the photoelectric emitter, and the fixed-axis linear motor stops working.

[0013] Based on the above solution, the fixed-axis linear motor of the present utility model is installed with a photoelectric emitter and a photoelectric receiver before leaving the factory, and the photoelectric emitter and the photoelectric receiver form a photoelectric sensor. Therefore, when the user uses the product of the present utility model, there is no need to separately design a mounting seat on the production line to fix the photoelectric sensor.

[0014] Based on the principle of low cost, through structural design, the fixed-axis linear motor series of the present utility model realizes the function of controlling the screw stroke position by adding a photoelectric sensor at the rear end. The fixed-axis linear motor of the present utility model has a simple and reliable appearance, broadens the application fields, has a high cost performance, and is easy to apply. Brief Description of the Drawings

[0015] Figure 1 It is an assembly drawing of a fixed-axis linear motor integrated with a photoelectric sensor.

[0016] Figure 2 It is an exploded view of the assembly drawing of a fixed-axis linear motor integrated with a photoelectric sensor.

[0017] Figure 3 It is a sectional view of a fixed-axis linear motor integrated with a photoelectric sensor in a non-working state.

[0018] Figure 4 It is a sectional view of a fixed-axis linear motor integrated with a photoelectric sensor in a working state.

[0019] Figure 5 It is a three-dimensional view of the connecting bracket.

[0020] Markings in the drawings:

[0021] Motor housing 1, sleeve 1a, intermediate body 1b, first extension body 1c, second extension body 1d, protrusion 1f, stator assembly 2, rotor assembly 3, bearing 4, axial extension 4a, nut 5, screw 6, output shaft 7, connecting bracket 8, collar 8a, first connecting seat 8b, end cover 8c, relief hole 8d, mounting bracket 9, relief groove 9a, main body 9b, first connecting arm 9c, second connecting arm 9d, second connecting seat 9e, photoelectric emitter 10, photoelectric receiver 11, screw 12. Detailed Description of the Preferred Embodiment

[0022] The present utility model will be further described in detail below with reference to the drawings and specific embodiments.

[0023] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present utility model.

[0024] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0025] In the present utility model, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model may be understood according to specific circumstances.

[0026] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0027] Such as Figures 1 to 5As shown in the figure, the fixed-axis linear motor integrated with a photoelectric sensor of the present utility model includes a fixed-axis linear motor body, and the fixed-axis linear motor body includes a motor housing 1, a stator assembly 2, a rotor assembly 3, a bearing 4, a nut 5, a screw 6, and an output shaft 7. The stator assembly 2 is located inside the motor housing 1 and fixed to the motor housing 1. Both ends of the rotor assembly 3 are respectively fixed to the bearing 4. The inner ring of the bearing 4 is provided with an axially extending portion 4a, and the rotor assembly 3 is fixed to the axially extending portion 4a, so that the two are fastened into one body. The bearing 4 is located inside the motor housing 1 and fixed to the motor housing 1.

[0028] The nut 5 is fixed to the rotor assembly 3, the screw 6 is threadedly connected to the nut 5, the output shaft 7 is fixed to the screw 6. One end of the motor housing 1 is provided with an assembly hole, and a protrusion 1f is provided in the assembly hole. A coupling groove arranged along the axial direction of the output shaft 7 is provided on the circumferential surface of the output shaft 7, and a protrusion and the coupling groove in the assembly hole are in sliding fit. Preferably, there are multiple protrusions 1f, and the protrusions 1f are arranged at intervals along the hole wall surface of the assembly hole, so as to form a spline sleeve. A spline is provided on the circumferential surface of the output shaft 7, so that the output shaft 7 and the motor housing 1 are in spline fit.

[0029] The fixed-axis linear motor of the present utility model further includes a connecting bracket 8, a mounting bracket 9, a photoelectric emitter 10, and a photoelectric receiver 11. The connecting bracket 8 is fixed to the other end of the motor housing 1. The mounting bracket 9 is fixed to the connecting bracket 8. A relief groove 9a for making way for the linear movement of the screw 6 is provided on the mounting bracket 9, and the photoelectric emitter 10 and the photoelectric receiver 11 are respectively mounted on two opposite groove wall surfaces of the relief groove 9a.

[0030] Since the output shaft 7 and the motor housing 1 are in spline fit, the output shaft 7 cannot rotate. And the screw 6 is fixed to the output shaft 7 as a whole. Thus, the screw 6 also cannot rotate. The nut 5, the screw 6, the output shaft 7 and the motor housing 1 constitute a lead screw mechanism. When the fixed-axis linear motor works, the rotor assembly 3 rotates, the rotor assembly 3 drives the nut 5 to rotate, the screw 6 moves linearly, and the output shaft 7 follows the screw 6 to move linearly. When the screw 6 enters the relief groove 9a and blocks the signal emitted by the photoelectric emitter 10 received by the photoelectric receiver 11, the fixed-axis linear motor works normally. When the screw 6 extends until it leaves the relief groove 9a, the photoelectric receiver 11 receives the signal emitted by the photoelectric emitter 10, and the fixed-axis linear motor stops working.

[0031] The motor housing 1 includes a sleeve 1a and a housing body. The housing body includes an intermediate body 1b and first and second extension bodies 1c and 1d provided at both ends of the intermediate body 1b. The outer diameters of the first and second extension bodies 1c and 1d are smaller than the outer diameter of the intermediate body 1b. One end of the sleeve 1a is located inside the first extension body 1c and is fixed to one of the bearings 4. The assembly hole is a through hole in the sleeve 1a, and the connection bracket 8 is engaged with the second extension body 1d.

[0032] The connection bracket 8 includes a collar 8a. A first connection seat 8b is provided on the circumferential surface of the collar 8a. The collar 8a is sleeved on the motor housing 1 and fixed to the motor housing 1. The mounting bracket 9 is fixed to the first connection seat 8b. The connection bracket 8 further includes an end cap 8c. The end cap 8c is fixed to one end of the collar 8a. A relief hole 8d is provided in the end cap 8c for the screw 6 to pass through when moving linearly.

[0033] The mounting bracket 9 includes a main body 9b, a first connecting arm 9c, a second connecting arm 9d, and a second connection seat 9e. After one ends of the first connecting arm 9c and the second connecting arm 9d are respectively fixed to the main body 9b, a relief groove 9a is formed between the main body 9b and the first and second connecting arms 9c and 9d. The photoelectric emitter 10 is installed on the first connecting arm 9c, and the photoelectric receiver 11 is installed on the second connecting arm 9d. The second connection seat 9e is fastened to the first connection seat 8b by screws 12 to form an integral body.

Claims

1. A fixed-axis linear motor with an integrated photoelectric sensor, comprising a fixed-axis linear motor body, the fixed-axis linear motor body comprising a motor housing (1), a stator assembly (2), a rotor assembly (3), a bearing (4), a nut (5), a screw (6), and an output shaft (7), wherein the stator assembly (2) is located in the motor housing (1) and fixed to the motor housing (1), the two ends of the rotor assembly (3) are respectively fixed to the bearings (4), the bearing (4) is located in the motor housing (1) and fixed to the motor housing (1), the nut (5) is fixed to the rotor assembly (3), the screw (6) is threadedly connected to the nut (5), the output shaft (7) is fixed to the screw (6), one end of the motor housing (1) is provided with an assembly hole, the assembly hole is provided with a protrusion, the circumferential surface of the output shaft (7) is provided with a coupling groove arranged along the axial direction of the output shaft (7), the assembly hole is provided with a protrusion that slides with the coupling groove, and the characteristics are as follows: The invention also comprises a connecting bracket (8), a mounting bracket (9), a photoelectric transmitter (10), and a photoelectric receiver (11); the connecting bracket (8) is fixed to the other end of the motor housing (1); the mounting bracket (9) is fixed to the connecting bracket (8); a clearance groove (9a) is provided on the mounting bracket (9) for making way for the screw rod (6) when it moves linearly; the photoelectric transmitter (10) and the photoelectric receiver (11) are respectively installed on two opposite groove wall surfaces of the clearance groove (9a).

2. The fixed-axis linear motor with integrated photoelectric sensor according to claim 1, characterized in that: The motor housing (1) comprises a sleeve (1a) and a housing body, the housing body comprises an intermediate body (1b) and a first extension body (1c) and a second extension body (1d) arranged at both ends of the intermediate body (1b), the outer diameters of the first extension body (1c) and the second extension body (1d) being smaller than the outer diameter of the intermediate body (1b), one end of the sleeve (1a) being located in the first extension body (1c) and being fixed to one of the bearings (4), the assembly hole being a through hole on the sleeve (1a), and the connecting bracket (8) being matched with the second extension body (1d).

3. The fixed-axis linear motor with integrated photoelectric sensor according to claim 1, characterized in that: The connecting bracket (8) comprises a ring sleeve (8a), a first connecting seat (8b) is provided on the circumferential surface of the ring sleeve (8a), the ring sleeve (8a) is sleeved on the motor housing (1) and fixed to the motor housing (1), and the mounting bracket (9) is fixed to the first connecting seat (8b).

4. The fixed-axis linear motor with integrated photoelectric sensor according to claim 1, characterized in that: The mounting bracket (9) comprises a main body (9b), a first connecting arm (9c), a second connecting arm (9d), and a second connecting seat (9e). After one end of the first connecting arm (9c) and the second connecting arm (9d) are respectively fixed to the main body (9b), a clearance groove (9a) is formed between the main body (9b) and the first connecting arm (9c) and the second connecting arm (9d). The photoelectric transmitter (10) is mounted on the first connecting arm (9c), and the photoelectric receiver (11) is mounted on the second connecting arm (9d).

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