Stroke limiting device of tubular motor

Abstract

The utility model discloses a stroke limiting device of a tubular motor. The stroke limiting device comprises a support, a collision block, a stroke switch, a first lead screw and nut assembly, a second lead screw and nut assembly and an intermediate transmission gear. The stroke limiting device further comprises an upper cover, a copper sheet assembly and a base. The base, the support and the upper cover are sequentially arranged from bottom to top. The copper sheet assembly is embedded in the base, the travel switch is embedded in the support and electrically connected with the copper sheet assembly, and the collision block, the first lead screw and nut assembly, the second lead screw and nut assembly and the intermediate transmission gear are clamped and fixed between the upper cover and the support. Compared with the prior art, the hole alignment device has the advantages that the base, the support and the upper cover are arranged, hole alignment is carried out layer by layer from bottom to top, tools, screws and bearing force are not needed, operation is easy and convenient, the requirement for workers is low, the requirement for equipment is low, and the requirement for tools is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to power device especially a stroke limiting device of tubular motor. BACKGROUND

[0002] The existing projection screen, motorized window curtain, roller shutter door etc. usually adopt motor drive to lift. In order to limit the stroke of the projection screen, window curtain etc., the stroke limiting structure is usually provided. The adjusting structure is arranged in the stroke limiting structure. According to the actual required lifting height of the projection screen or window curtain, the stroke can be independently adjusted by operating the adjusting structure, without interference, which greatly facilitates the user.

[0003] The stroke limiting device of the existing AC tubular motor generally adopts the design that the plurality of holes in the support insert the lead screw, spring and intermediate transmission gear, the two screw rods of the support are fixed with the stroke switch support, so as to fix the lead screw and intermediate transmission gear. For example, the stroke mechanism of tubular motor disclosed in the Chinese patent with the application number 201520522731.2.

[0004] The above existing technology has the following problems:

[0005] 1) When the worker assembles this step, the stroke switch support needs to be aligned with the positions of the two lead screws, two bumpers, one intermediate gear and two screw rods 7 holes while resisting the force of the lead screw spring. In addition, the nut needs to be fixed while pressing the stroke switch support to resist the force of the lead screw spring. In this process, the 7 holes are aligned and the nut is fixed under the condition of continuous force. The assembly is difficult, and it is difficult for workers who are not skilled to assemble, which greatly increases the requirements for workers.

[0006] 2) The design of the support embedded with two screw rods requires injection molding. The screw rod is long and easy to tilt and misplace. In addition, since the two screw rods fix the stroke switch support, the stroke switch support may also tilt, which will directly cause the position of the stroke switch to change, resulting in inaccurate stroke.

[0007] 3) The traditional stroke wiring adopts the welding connection of the power cord and the stroke switch plug-in piece, or the power cord is separately made into a connector, which is connected with the stroke switch through the connector terminal. The stroke switch output line also needs to be connected with the stator winding output line of the motor through welding or connector. The process is complicated, and the wires are tangled in the outer tube of the motor (in the space between the stroke and the stator).

[0008] Therefore, there is still room for improvement. UTILITY MODEL CONTENT

[0009] The utility model provides to solve the technical problem that the prior art exists for the above, provide a stroke limiting device of tubular motor, need not help outside tool, need not assemble to the hole to the position under the case of bearing force, simple operation, low to worker, equipment, tooling requirement, stroke adjustment, setting, operation is more reliable.

[0010] The utility model discloses a stroke limiting device of tubular motor, including support, baffle, travel switch, first screw rod and nut subassembly, second screw rod and nut subassembly and intermediate transmission gear, it is characterized by:

[0011] The stroke limiting device further includes an upper cover, a copper sheet assembly, and a base, the base, the support, and the upper cover are arranged in sequence from bottom to top;

[0012] The copper sheet assembly is embedded on the base, the travel switch is embedded on the support and electrically connected with the copper sheet assembly, the baffle, the first screw rod and the nut subassembly, the second screw rod and the nut subassembly, and the intermediate transmission gear are clamped and fixed between the upper cover and the support.

[0013] By setting the base, the support, and the upper cover, the relative position change is avoided from bottom to top layer by layer, without tools, without screws, without the hole to the position under the case of bearing force, simple operation, low to worker, low to equipment, low to tooling requirement, the traditional screw rod and the baffle and the travel switch are installed on two parts, when the fixed nut is loose or the travel switch support is inclined, the relative position change will cause the stroke change, but the utility model installs the travel switch and the screw rod, the baffle on the same part support, the relative position of three is completely fixed, the relative position change is avoided in physics, stroke adjustment, setting, operation is more reliable.

[0014] Further, to facilitate the fixation of the base and the support, the base includes a base body, the base body has a first positioning protrusion formed thereon, the support includes a support body, the support body has a first positioning hole formed on a side thereof facing the base, and the first positioning protrusion can be inserted into the first positioning hole.

[0015] The surface of the base body on a side facing the upper cover further has a protruding portion protruding towards the upper cover, the support body has a first insertion slot formed on an end portion thereof corresponding to the protruding portion, and the protruding portion can be inserted into the first insertion slot.

[0016] Further, to facilitate the fixation of the upper cover and the support, the upper cover includes a second positioning protrusion extending towards the support, the support has a second positioning hole formed on a position thereof corresponding to the second positioning protrusion, and the second positioning protrusion can be inserted into the second positioning hole.

[0017] Further, in order to fix the copper sheet, the copper sheet assembly comprises a first copper sheet as a positive and reverse rotation line energizing circuit of the tubular motor, a second copper sheet as a common line energizing circuit of the tubular motor, and a third copper sheet for connecting with an external power supply, the first copper sheet and the third copper sheet are connected with two pins of the travel switch respectively.

[0018] The base comprises a base, and a surface of the base towards the upper cover is formed with a first groove, a second groove and a third groove recessed away from the upper cover, the first copper sheet is embedded in the first groove, the second copper sheet is embedded in the second groove, and the third copper sheet is embedded in the third groove.

[0019] Further, the surface of the base towards the upper cover further has a protruding part protruding towards the upper cover, and the first groove and the third groove are respectively located on two opposite sides of the protruding part.

[0020] The protruding part is formed with a first fixing groove, one end of the first copper sheet has a first bending part bent towards the upper cover, and the end of the first bending part is inserted into the first fixing groove; a second fixing groove is formed between the third groove and the protruding part, one end of the third copper sheet has a second bending part bent away from the upper cover, and the end of the second bending part is inserted into the second fixing groove; the pins of the travel switch are respectively inserted into the fixing grooves and are pressed against the corresponding copper sheets.

[0021] The connection is reliable through physical angle pressing of the copper sheet deformation, and the whole process does not need welding, connector, wire and stripping, and the operation is convenient.

[0022] Further, the base comprises a base, and the travel limiting device further comprises a capacitor, and opposite sides of the base are further formed with support frames, the two support frames are arc-shaped and protrude away from each other, and the capacitor is clamped into a cavity between the two support frames.

[0023] The capacitor further comprises protrusions, a third fixing groove is formed between the bottom of each support frame and the corresponding side of the base, each protrusion corresponds to a third fixing groove, and the protrusion is clamped in the corresponding third fixing groove, thereby conveniently fixing the capacitor.

[0024] Further, the copper sheet assembly comprises a first copper sheet as a positive and reverse rotation line energizing circuit of the tubular motor, the capacitor is placed on the first copper sheet, and the capacitor comprises two pins formed on the bottom, the pins are in contact with the first copper sheet, thereby conveniently electrically connecting the capacitor.

[0025] Further, in order to fix the travel switch, the support frame comprises a support frame body, a side of the support frame body away from the base is formed with a first accommodating groove recessed towards the base, and the travel switch is placed in the first accommodating groove.

[0026] Further, in order to fix the block, the bracket comprises a bracket body, a second accommodating groove and a second insertion groove are further formed on the side of the bracket body away from the base, the second accommodating groove is recessed towards the base, the block is arranged in the second accommodating groove, and the spring sheet for supporting the first screw rod and the nut assembly and the second screw rod and the nut assembly is arranged in the second insertion groove.

[0027] Further, in order to fix the block, the bracket comprises a bracket body, a second accommodating groove and a second insertion groove are further formed on the side of the bracket body away from the base, the second accommodating groove is recessed towards the base, the block is arranged in the second accommodating groove, and the spring sheet for supporting the first screw rod and the nut assembly and the second screw rod and the nut assembly is arranged in the second insertion groove.

[0028] The fourth groove and the fifth groove are semicircular grooves, and the upper cover is arranged on the bracket to fix the first screw rod and the nut assembly, the second screw rod and the nut assembly and the intermediate transmission gear.

[0029] Compared with the prior art, the advantages of the utility model lie in that: through setting base, bracket and upper cover, preventing from below to above layer by layer, without tool, without screw, without hole position under force bearing, simple operation, low requirement for workers, low requirement for equipment, low requirement for tooling; the traditional screw rod and block and travel switch are installed on two parts, when the fixed nut is loose or the travel switch bracket is inclined, the relative position changes, which causes travel change, the utility model installs the travel switch, the screw rod and the block on the same part bracket, the relative positions of the three are completely fixed, the relative position change is avoided in physics, travel adjustment, setting and operation are more reliable; copper sheet is used for realizing electric connection, the copper sheet is deformed to be pressed tightly in a physical angle, the connection is reliable, and the whole process does not need welding, connector, wire and stripping, and operation is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 The schematic view of the tubular motor applied to the travel limiting device of the utility model embodiment;

[0031] Figure 2 The schematic view of the tubular motor hiding the outer tube of the tubular motor; Figure 1

[0032] Figure 3 The schematic view of the travel limiting device of the utility model embodiment;

[0033] Figure 4 ​This is an exploded view of the stroke limiting device according to an embodiment of the present utility model;

[0034] Figure 5 This is a schematic diagram of the base of the travel limiting device according to an embodiment of the present utility model;

[0035] Figure 6 This is a schematic diagram of the assembly of the base and copper sheet of the travel limiting device according to an embodiment of the present utility model;

[0036] Figure 7 This is a schematic diagram of the capacitor in the travel limiting device according to an embodiment of the present invention;

[0037] Figure 8 This is a schematic diagram of the capacitor in the stroke limiting device of this utility model embodiment (and...). Figure 7 (Different perspectives);

[0038] Figure 9 This is a schematic diagram of the bracket of the stroke limiting device according to an embodiment of the present utility model;

[0039] Figure 10 This is a schematic diagram of the bracket of the stroke limiting device according to an embodiment of the present utility model (and...). Figure 9 (Different perspectives) Detailed Implementation

[0040] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions.

[0041] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this utility model can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0042] See Figures 1-4The application discloses a stroke limiting device of a tubular motor, and the tubular motor applied by the stroke limiting device comprises an outer tube 200, a stroke head 300 arranged at the end of the outer tube 200, and a stroke limiting device 100 arranged in the outer tube 200 and connected with the stroke head 300.

[0043] The stroke limiting device 100 comprises an upper cover 1, a capacitor 2, a copper sheet assembly (a first copper sheet 31, a second copper sheet 32 and a third copper sheet 33), a base 4, a support 5, a spring sheet 6, a striker 7, a stroke switch 8, a first screw rod and nut assembly 91, a second screw rod and nut assembly 92 and an intermediate transmission gear 10.

[0044] Referring to Figures 4-6 The upper cover 1 is arranged above the base 4, the base 4 comprises a base 41, the surface of the base 41 towards the upper cover 1 is formed with a first recess 42 recessed away from the upper cover 1, and the first copper sheet 31 serving as a positive and negative rotation line power circuit of the tubular motor is partially embedded in the first recess 42. The surface of the base 41 towards the upper cover 1 is also provided with a protruding part 43 protruding towards the upper cover 1, the protruding part 43 is formed with a first fixing groove 44, and one end of the first copper sheet 31 is provided with a first bending part 311 bent towards the upper cover 1, and the end of the first bending part 311 can be inserted into the first fixing groove 44. The first copper sheet 31 has two, and the same first recess 42 also has two arranged in parallel and spaced apart, so as to avoid short circuit caused by contact of the copper sheets, and the two first recesses 42 can be parallel to each other.

[0045] The surface of the base 41 towards the upper cover 1 is also formed with a second recess 45 recessed away from the upper cover 1, the second copper sheet 32 serving as a common line power circuit of the motor is embedded in the second recess 45, and part of the second recess 45 can be located between the two first recesses 41, and the first recess 41 and the second recess 45 are arranged in a spaced apart manner, so as to avoid short circuit caused by contact of the copper sheets.

[0046] The surface of the base 41 towards the upper cover 1 is also formed with a third recess 46 recessed away from the upper cover 1, and the third copper sheet 33 is partially embedded in the third recess 46, a second fixing groove 47 is formed between the third recess 46 and the protruding part 43, and one end of the third copper sheet 33 is provided with a second bending part 331 bent away from the upper cover 1, and the end of the second bending part 331 can be inserted into the second fixing groove 47. The third copper sheet 33 has two, and the same third recess 46 also has two arranged in parallel and spaced apart, so as to avoid short circuit caused by contact of the copper sheets, and the two third recesses 46 can be parallel to each other. The first recess 42 and the third recess 46 are respectively located on the opposite sides of the protruding part 43, preferably, the extension directions of the first recess 42, the second recess 45 and the third recess 46 are parallel to the axial direction of the tubular motor. The third copper sheet 33 is electrically connected with an external power supply.

[0047] The base 41 is also provided with two support frames 48, which extend between the protruding part 43 and one end of the base 41, and are in the shape of arcs protruding away from each other, and are open towards the upper end of the upper cover 1, so that the capacitor 2 can be clamped into the cavity between the two support frames 48, which corresponds to the position of the first groove 42. Figure 7 and Figure 8 The capacitor 2 is provided with two pins 21 formed on the bottom, which are also copper sheets, and are in the shape of elastic protrusions, and each pin 21 is in contact with one of the first copper sheets 31. The capacitor 2 is also provided with protrusions 22, and between the bottom of each support frame 48 and the corresponding side of the base 41, a third fixing groove 49 is formed, and each protrusion 22 is clamped into the corresponding third fixing groove 49, so as to complete the installation of the capacitor 2. Through the cooperation of the capacitor 2, the support frame 48 and the third fixing groove 49, the reliable connection between the pin 21 of the capacitor 2 and the first copper sheet 31 can be ensured, and the capacitor 2 will not be loosened during the assembly of other parts.

[0048] The base 41 is provided with opposite first and second ends 411 and 412, wherein the first end 411 is close to the stroke head 300, and the second end 412 is away from the stroke head 300, and the capacitor 2 is located between the second end 412 of the base 41 and the protruding part 43. Figure 5 , Figure 9 and Figure 10 The base 41 of the base 4 is provided with a first positioning protrusion 413 close to the first end 411, and the bracket 5 is provided with a bracket body 51, and the bracket body 51 is provided with a first positioning hole 52 on the side close to the base 4, and the first positioning protrusion 413 is clamped into the first positioning hole 52, and the bracket body 51 is provided with a first insertion slot 53 corresponding to the end of the protruding part 43, and the protruding part 43 is inserted into the first insertion slot 53, so as to fix the bracket body 51 and the base 4.

[0049] The side of the bracket body 51 away from the base 4 is also provided with a first accommodating groove 54 recessed towards the base 4, and the first accommodating groove 54 is provided close to the protruding part 43 of the base 4. The stroke switch 8 is located in the first accommodating groove 54, and the stroke switch 8 is also provided with two, and each stroke switch 8 corresponds to the first copper sheet 31 and the third copper sheet 33, and the two pins of the stroke switch 8 are inserted into the first fixing groove 44 and the second fixing groove 47, respectively, so that the two pins of each stroke switch 8 are pressed and reliably connected with the first copper sheet 31 and the third copper sheet 33 (by the deformation of the curved part of the copper sheet in the narrow groove), so as to realize the electrical connection between the external power supply and the motor core.

[0050] The second accommodating grooves 55 are recessed toward the base 4, and the second accommodating grooves 55 are provided with the above-mentioned two bumpers 7, and the above-mentioned two spring sheets 6 are inserted into the corresponding second accommodating grooves 56.

[0051] The fourth grooves 57 and the fifth grooves 58 are recessed toward the base 4, and the first screw rod and nut assembly 91 (left-handed) and the second screw rod and nut assembly 92 (right-handed) are respectively arranged in the corresponding one of the fourth grooves 57, and the intermediate transmission gear 10 is arranged in the fifth groove 58 of the bracket body 51 and located between the first screw rod and nut assembly 91 and the second screw rod and nut assembly 92. The fifth groove 58 can have two intervals extending along the axial direction of the intermediate transmission gear 10, and the intermediate transmission gear 10 is arranged in the corresponding one of the fifth grooves 58.

[0052] The fourth grooves 57 and the fifth grooves 58 are semicircular grooves, and the upper cover 1 is arranged on the bracket 5, and the first screw rod and nut assembly 91, the second screw rod and nut assembly 92 and the intermediate transmission gear 10 are fixed by the cooperation of the two sets of grooves of the upper cover 1 and the bracket 5.

[0053] The upper cover 1 includes a second positioning protrusion 11 extending toward the bracket 5, and the bracket 5 is provided with a second positioning hole 59 corresponding to the second positioning protrusion 11, and the second positioning protrusion 11 is clamped into the second positioning hole 59. Meanwhile, the upper cover 1 is arranged on the capacitor 2.

[0054] Therefore, the overall installation is completed by this way of placing from bottom to top and layer by layer in sequence, which is convenient and simple in structure.

Claims

1. A stroke limiting device of a tubular motor, comprising a bracket (5), a stop block (7), a stroke switch (8), a first screw and nut assembly (91), a second screw and nut assembly (92) and an intermediate transmission gear (10), characterized in that: the stroke limiting device further comprises a cover (1), a copper sheet assembly and a base (4), the base (4), the bracket (5) and the cover (1) are arranged in sequence from bottom to top; the copper sheet assembly is embedded on the base (4), the stroke switch (8) is embedded on the bracket (5) and electrically connected with the copper sheet assembly, and the stop block (7), the first screw and nut assembly (91), the second screw and nut assembly (92) and the intermediate transmission gear (10) are clamped and fixed between the cover (1) and the bracket (5). the base (4) comprises a base body (41), a first positioning protrusion (413) is formed on the base body (41), the bracket (5) comprises a bracket body (51), a first positioning hole (52) is formed on one side of the bracket body (51) facing the base (4), and the first positioning protrusion (413) can be clamped into the first positioning hole (52); 2. A travel limiter for a tubular motor according to claim 1, characterised in that: a protruding portion (43) protruding towards the cover (1) is further formed on the surface of the base body (41) facing the cover (1), a first insertion slot (53) is formed on the end of the bracket body (51) corresponding to the protruding portion (43), and the protruding portion (43) can be inserted into the first insertion slot (53). the cover (1) comprises a second positioning protrusion (11) extending towards the bracket (5), a second positioning hole (59) is formed on the bracket (5) corresponding to the second positioning protrusion (11), and the second positioning protrusion (11) can be clamped into the second positioning hole (59).

3. A travel limiter for a tubular motor according to claim 1, wherein: the copper sheet assembly comprises a first copper sheet (31) as a positive and negative rotation line energizing circuit of the tubular motor, a second copper sheet (32) as a common line energizing circuit of the tubular motor and a third copper sheet (33) for connecting with an external power supply, the first copper sheet (31) and the third copper sheet (33) are connected with two pins of the stroke switch (8) respectively; 4. A travel limiter for a tubular motor according to claim 1, wherein: the base (4) comprises a base body (41), a first recess (42), a second recess (45) and a third recess (46) recessed away from the cover (1) are formed on the surface of the base body (41) facing the cover (1), the first copper sheet (31) is embedded in the first recess (42), the second copper sheet (32) is embedded in the second recess (45), and the third copper sheet (33) is embedded in the third recess (46). the surface of the base body (41) facing the cover (1) further has a protruding portion (43) protruding towards the cover (1), and the first recess (42) and the third recess (46) are respectively located on the opposite sides of the protruding portion (43); 5. A travel limiting arrangement for a tubular motor according to claim 4 wherein: ​ The convex part (43) is provided with a first fixing groove (44), one end of the first copper sheet (31) is provided with a first bending part (311) which is bent towards the upper cover (1), and the end of the first bending part (311) is inserted into the first fixing groove (44); the third groove (46) and the convex part (43) are provided with a second fixing groove (47), one end of the third copper sheet (33) is provided with a second bending part (331) which is bent away from the upper cover (1), and the end of the second bending part (331) is inserted into the second fixing groove (47); the pins of the travel switch (8) are respectively inserted into the fixing grooves and are pressed against the corresponding copper sheets.

6. A travel limiter for a tubular motor according to claim 1, wherein: The base (4) comprises a base (41), the travel limiting device further comprises a capacitor (2), and opposite sides of the base (41) are further provided with support frames (48), the two support frames (48) are arc-shaped and protrude away from each other, and the capacitor (2) is clamped into the cavity between the two support frames (48); The capacitor (2) further comprises a convex part (22), a third fixing groove (49) is formed between the bottom of each support frame (48) and the corresponding side of the base (41), each convex part (22) corresponds to one third fixing groove (49), and the convex part (22) is clamped in the corresponding third fixing groove (49).

7. A travel limiting arrangement for a tubular motor according to claim 6 wherein: The copper sheet assembly comprises a first copper sheet (31) which is a positive and negative rotation line energizing circuit of a tubular motor, the capacitor (2) is arranged above the first copper sheet (31), and the capacitor (2) comprises two pins (21) formed on the bottom, the pins (21) are in contact with the first copper sheet (31).

8. A travel limiter for a tubular motor according to claim 1, wherein: The support (5) comprises a support body (51), and a first containing groove (54) recessed towards the base (4) is formed on the side of the support body (51) away from the base (4), and the travel switch (8) is arranged in the first containing groove (54).

9. A travel limiter for a tubular motor according to claim 1, wherein: The support (5) comprises a support body (51), and a second containing groove (55) and a second insertion groove (56) are further formed on the side of the support body (51) away from the base (4), the second containing groove (55) is recessed towards the base (4), the abutting block (7) is arranged in the second containing groove (55), and the spring sheet (6) for supporting the first screw rod and nut assembly (91) and the second screw rod and nut assembly (92) is arranged in the second insertion groove (56).

10. A travel limiting device for a tubular motor according to claim 9, wherein: The side of the support body (51) away from the base (4) is further provided with a fourth groove (57) and a fifth groove (58), the fourth groove (57) and the fifth groove (58) are respectively recessed towards the base (4), the first screw rod and nut assembly (91) and the second screw rod and nut assembly (92) are respectively arranged in the corresponding one of the fourth grooves (57), and the intermediate transmission gear (10) is also arranged in the fifth groove (58) of the support body (51) and is located between the first screw rod and nut assembly (91) and the second screw rod and nut assembly (92). The fourth groove (57) and the fifth groove (58) are semicircular grooves respectively, and the upper cover (1) is covered on the support (5) to fix the first screw rod and nut assembly (91), the second screw rod and nut assembly (92) and the intermediate transmission gear (10).

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