Brake mechanism and gear motor

Abstract

The brake mechanism comprises a shell, a transmission assembly comprises a first transmission piece and a second transmission piece which are located in the shell and can coaxially rotate along an axis, and the first transmission piece and the second transmission piece are arranged on the two sides of the axis respectively and are correspondingly provided with a first matching part and a second matching part; the first matching part and the second matching part are arranged at an interval in the radial direction of the axis so as to form two gaps on the two sides in the radial direction of the axis; the torsion spring comprises a torsion spring body arranged outside the first transmission piece and the second transmission piece in a sleeving mode and two torsion arms arranged at the two ends of the torsion spring body, and the two torsion arms stretch into the two gaps respectively. The first transmission part is driven by the gear motor to enable one end of the torsion spring to deform inwards in the radial direction to be separated from the inner wall of the shell, and when the first matching part abuts against the second matching part, the second transmission part can rotate along with the first transmission part. Rotation motion is directly transmitted to the second transmission piece through the first transmission piece, the brake stroke angle is small, and the precision of the output shaft is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of reduction motors, in particular to a brake mechanism and a reduction motor. Background Art

[0002] A reduction motor refers to an integrated body of a reducer and a motor. Since the output speed of the motor is extremely fast, it is usually not possible to directly connect the load. Instead, a reduction box needs to be set between the motor and the load to reduce the higher motor output speed to a lower rotation speed. Some electric equipment requires that the load end cannot rotate the shaft due to its own weight when the motor stops, otherwise an accident will occur. For this reason, a brake component needs to be configured in the reduction box to ensure that the load end does not actively rotate due to its own weight when the motor stops. At present, the brake mechanism is located in the middle of the planetary reducer. Although the brake protection function can be realized, the brake stroke angle of the output shaft will be magnified after passing through multi-stage gear transmission, affecting the output shaft accuracy. Utility Model Content

[0003] The main purpose of the utility model is to provide a brake mechanism and a reduction motor, aiming to solve the problem that the existing brake mechanism is arranged in the middle of the planetary reducer, the output shaft brake stroke angle is amplified after multi-stage gear transmission, resulting in low output shaft accuracy.

[0004] In order to achieve the above-mentioned purpose, the utility model proposes a brake mechanism, comprising:

[0005] A housing, used to be fixed to the main body of the reduction motor;

[0006] A transmission assembly, comprising a first transmission member and a second transmission member located in the housing and coaxially rotatable along an axis, the first transmission member and the second transmission member are respectively arranged on both sides of the axis and are correspondingly provided with a first matching portion and a second matching portion, the first matching portion and the second matching portion are spaced apart in the radial direction of the axis to form two gaps located between the first matching portion and the second matching portion and on both sides of the axis in the radial direction, the first transmission member is used to be drivingly connected to the reduction motor, and the second transmission member is used to be drivingly connected to a load; and,

[0007] A torsion spring, comprising a torsion spring body sleeved outside the first transmission member and the second transmission member, and two torsion arms arranged at two ends of the torsion spring body, the two torsion arms respectively extending into the two gaps;

[0008] Wherein, driven by the reduction motor, the first transmission member can rotate relative to the second transmission member and twist the torsion arm, so that one end of the torsion spring is deformed radially inward and separated from the inner wall of the outer shell, and when the first matching portion and the second matching portion are in contact, the second transmission member can rotate with the first transmission member.

[0009] Optionally, the first transmission member further comprises a base and a first matching column, wherein the base is arranged at one end of the first matching portion along its axial direction and is used for driving connection with the reducer, and the first matching column is arranged at the base, and a part of its outer side surface is adapted to the first matching portion;

[0010] The second matching portion is adapted to a portion of an outer side surface of the first matching column that is away from the first matching portion, so that the first transmission member is rotationally matched with the second transmission member.

[0011] Optionally, one end of the first matching portion facing away from the base is protruding from the end surface of the first matching column;

[0012] The second transmission member also includes a connecting seat and a second matching column. The connecting seat is arranged at one end of the second matching portion facing away from the base for connecting to a load drive. The second matching column is arranged on the end surface of the connecting seat facing the base, and the peripheral side surface of the second matching column respectively matches with the second matching portion and the portion of the first matching portion protruding from the first matching column.

[0013] Optionally, the second transmission member further comprises a transmission shaft, the transmission shaft being arranged on the end surface of the connecting seat facing away from the base, for being connected to the load driving;

[0014] The housing includes a shell and an end cover, the shell is formed with an open accommodating chamber for accommodating the transmission assembly and the torsion spring, the end cover is arranged on the opening of the accommodating chamber, the bottom wall of the accommodating chamber and the end cover are both provided with through holes, the two through holes are respectively used for the transmission shaft and the output shaft of the reducer to pass through, and the end cover is used to be fixed to the gear box of the reduction motor.

[0015] Optionally, the housing comprises a first housing and a second housing, the first housing is sleeved outside the second housing, and one end of the first housing protrudes from an end surface of the second housing to form an inner gear ring, and the transmission assembly is arranged in the second housing;

[0016] The transmission assembly further includes a gear transmission mechanism disposed in the first housing and outside the second housing, the gear transmission mechanism including:

[0017] A driving gear, used for being mounted on the output shaft end of the reducer;

[0018] A first gear transmission structure includes a plurality of first gears, a rotating disk and a second gear, wherein the second gear is rotatably mounted on an end surface of the rotating disk facing the second housing, and a plurality of first gears are rotatably mounted on an end surface of the rotating disk facing away from the second housing and are spaced apart along the circumference of the rotating disk, and the plurality of first gears are respectively meshed with the driving gear and the inner gear ring; and,

[0019] The second gear transmission structure includes a plurality of third gears, which are arranged at intervals along the circumference of the end surface of the base facing away from the second matching portion and are respectively meshed with the second gear and the inner gear ring.

[0020] Optionally, the first transmission member further comprises an arc-shaped guide portion, the guide portion is provided on the base and arranged along the same circumference as the first matching portion, and the guide portion and the first matching column are spaced apart;

[0021] The second matching portion is provided with a guide groove on the end surface facing the base, and the side wall of the guide groove penetrates the outer side wall of the second matching portion. The guide portion extends into the guide groove to guide the rotation of the second transmission member.

[0022] Optionally, one end of the guide portion is connected to the first matching portion, and the other end is spaced apart from the first matching portion to form an insertion opening between the first matching portion and the guide portion;

[0023] A limiting protrusion is formed on the second matching portion, and the limiting protrusion extends into the insertion opening to limit the rotation stroke of the first transmission member.

[0024] Optionally, a first accommodating groove is provided on an end surface of the first matching portion facing the second matching portion, and a side edge of the first accommodating groove passes through the first matching portion to accommodate one of the torsion arms.

[0025] Optionally, a second accommodating groove is provided on an end surface of the second matching portion facing the first matching portion, and a side edge of the second accommodating groove passes through the second matching portion to accommodate another of the torsion arms.

[0026] In addition, the utility model also proposes a reduction motor, the reduction motor includes a brake mechanism, and the brake mechanism includes:

[0027] A housing, used to be fixed to the main body of the reduction motor;

[0028] A transmission assembly, comprising a first transmission member and a second transmission member located in the housing and coaxially rotatable along an axis, the first transmission member and the second transmission member are respectively arranged on both sides of the axis and are correspondingly provided with a first matching portion and a second matching portion, the first matching portion and the second matching portion are spaced apart in the radial direction of the axis to form two gaps located between the first matching portion and the second matching portion and on both sides of the axis in the radial direction, the first transmission member is used to be drivingly connected to the reduction motor, and the second transmission member is used to be drivingly connected to a load; and,

[0029] A torsion spring, comprising a torsion spring body sleeved outside the first transmission member and the second transmission member, and two torsion arms arranged at two ends of the torsion spring body, the two torsion arms respectively extending into the two gaps;

[0030] Wherein, driven by the reduction motor, the first transmission member can rotate relative to the second transmission member and twist the torsion arm, so that one end of the torsion spring is deformed radially inward and separated from the inner wall of the outer shell, and when the first matching portion and the second matching portion are in contact, the second transmission member can rotate with the first transmission member.

[0031] In the technical solution of the utility model, the brake mechanism includes a housing, a transmission assembly and a torsion spring, the housing is used to be fixed to the reduction motor body; the transmission assembly includes a first transmission member and a second transmission member located in the housing and coaxially rotatable along an axis, the first transmission member and the second transmission member are respectively arranged on both sides of the axis, and are correspondingly provided with a first matching portion and a second matching portion, the first matching portion and the second matching portion are spaced apart in the radial direction of the axis to form two gaps located between the first matching portion and the second matching portion and on both sides of the axis in the radial direction, the first transmission member is used to match with the The reduction motor is driven and connected, and the second transmission member is used to be driven and connected with the load; the torsion spring includes a torsion spring body which is sleeved on the outside of the first transmission member and the second transmission member, and two torsion arms which are arranged at both ends of the torsion spring body, and the two torsion arms respectively extend into the two gaps; wherein, the first transmission member, driven by the reduction motor, can rotate relative to the second transmission member and twist one of the torsion arms, so that one end of the torsion spring is deformed radially inward and separated from the inner wall of the outer shell, and when the first matching portion and the second matching portion are abutted, the second transmission member can rotate with the first transmission member. When the reduction motor is working, the first transmission member rotates under the drive of the reduction motor to twist the torsion arm, thereby causing one end of the torsion spring to deform radially inward and separate from the inner wall of the housing (i.e., one end of the torsion spring is separated from the inner wall of the housing, while the other end is in contact with the inner wall of the housing), so that the second transmission member can rotate with the first transmission member, thereby driving the load. Since a part of the torsion spring is always in contact with the inner wall of the housing when the brake mechanism is not braking, the brake mechanism can brake and self-lock at the moment the reduction motor stops, thereby protecting the gears of the reduction box and locking the load in position. In this solution, the first transmission member and the second transmission member rotate coaxially along an axis, and the first transmission member is connected to the output shaft end of the reduction motor. In this way, the rotational motion of the output shaft of the reduction motor is directly transmitted to the second transmission member through the first transmission member without passing through other intermediate transmissions. The brake stroke angle is small, which improves the accuracy of the output shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0033] Figure 1A three-dimensional exploded schematic diagram of an embodiment of a brake mechanism provided by the utility model;

[0034] Figure 2 for Figure 1 A cross-sectional view of the middle brake mechanism;

[0035] Figure 3 for Figure 2 Sectional view at AA in the middle;

[0036] Figure 4 for Figure 2 Sectional view at the middle BB;

[0037] Figure 5 It is a schematic diagram of the assembly of the first transmission member, the second transmission member and the torsion spring;

[0038] Figure 6 is a schematic diagram of the assembly of the first transmission member and the second transmission member;

[0039] Figure 7 for Figure 6 A schematic structural diagram of the first transmission member;

[0040] Figure 8 for Figure 6 A schematic structural diagram of the second transmission member;

[0041] Fig. 9 for Figure 1 Schematic diagram of the structure of the torsion spring;

[0042] Fig.10 A three-dimensional exploded schematic diagram of an embodiment of a brake mechanism provided by the utility model;

[0043] Fig.11 for Fig.10 A cross-sectional view of the middle brake mechanism;

[0044] Fig.12 is a three-dimensional schematic diagram of a brake mechanism (the first housing is not shown);

[0045] Fig.13 It is a schematic diagram of the assembly of the first shell and the second shell.

[0046] Description of Figure Numbers:

[0047]

[0048]

[0049] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0051] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0052] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0053] A reduction motor refers to an integrated body of a reducer and a motor. Since the output speed of the motor is extremely fast, it is usually not possible to directly connect the load. Instead, a reduction box needs to be set between the motor and the load to reduce the higher motor output speed to a lower rotation speed. Some electric equipment requires that the load end cannot rotate the shaft due to its own weight when the motor stops, otherwise an accident will occur. For this reason, a brake component needs to be configured in the reduction box to ensure that the load end does not actively rotate due to its own weight when the motor stops. At present, the brake mechanism is located in the middle of the planetary reducer. Although the brake protection function can be realized, the brake stroke angle of the output shaft will be magnified after passing through multi-stage gear transmission, affecting the output shaft accuracy.

[0054] In view of this, the utility model proposes a brake mechanism, wherein the first transmission member and the second transmission member rotate coaxially along an axis, and the first transmission member is directly connected to the output shaft end of the reduction motor, so that the rotational motion of the output shaft of the reduction motor is directly transmitted to the second transmission member through the first transmission member without passing through other intermediate transmissions, the brake stroke angle is small, and the accuracy of the output shaft is improved. Figures 1 to 9 As shown, it is an embodiment of the brake mechanism provided by the utility model; Figures 10 to 13 FIG. 2 shows another embodiment of the brake mechanism provided by the utility model.

[0055] like Figures 1 to 6 As shown, the brake mechanism 100 proposed by the utility model includes a housing 1, a transmission assembly 2 and a torsion spring 3, wherein the housing 1 is used to be fixed to the main body of the reduction motor; the transmission assembly 2 includes a first transmission member 21 and a second transmission member 22 located in the housing 1 and coaxially rotatable along an axis, the first transmission member 21 and the second transmission member 22 are respectively arranged on both sides of the axis, and are correspondingly provided with a first matching portion 211 and a second matching portion 221, the first matching portion 211 and the second matching portion 221 are spaced apart in the radial direction of the axis to form two gaps located between the first matching portion 211 and the second matching portion 221 and on both sides of the axis in the radial direction, the first transmission member 21 is used to The reduction motor is driven to connect, and the second transmission member 22 is used to drive and connect with the load; the torsion spring 3 includes a torsion spring body 31 sleeved outside the first transmission member 21 and the second transmission member 22, and two torsion arms 32 arranged at both ends of the torsion spring body 31, and the two torsion arms 32 extend into the two gaps respectively; wherein, under the drive of the reduction motor, the first transmission member 21 can rotate relative to the second transmission member 22 and twist one of the torsion arms 32, so that one end of the torsion spring 3 is deformed radially inward and separated from the inner wall of the housing 1, and when the first matching portion 211 and the second matching portion 221 are in contact, the second transmission member 22 can rotate with the first transmission member 21. It should be noted that the two torsion arms 32 are arranged at 180° along the circumference of the torsion spring body 31. In this way, the mass of the first transmission member 21 and the second transmission member 22 is balanced to reduce imbalance and vibration.

[0056] In the technical solution of the present utility model, the brake mechanism 100 includes a housing 1, a transmission assembly 2 and a torsion spring 3, wherein the housing 1 is used to be fixed to the main body of the reduction motor; the transmission assembly 2 includes a first transmission member 21 and a second transmission member 22 located in the housing 1 and coaxially rotatable along an axis, wherein the first transmission member 21 and the second transmission member 22 are respectively arranged on both sides of the axis, and are correspondingly provided with a first matching portion 211 and a second matching portion 221, wherein the first matching portion 211 and the second matching portion 221 are spaced apart in the radial direction of the axis to form two gaps located between the first matching portion 211 and the second matching portion 221 and on both sides of the axis in the radial direction, wherein the first transmission member 21 is used to match with The reduction motor is driven and connected, and the second transmission member 22 is used to be driven and connected with the load; the torsion spring 3 includes a torsion spring body 31 which is sleeved outside the first transmission member 21 and the second transmission member 22, and two torsion arms 32 which are arranged at both ends of the torsion spring body 31, and the two torsion arms 32 extend into the two gaps respectively; wherein, the first transmission member 21, driven by the reduction motor, can rotate relative to the second transmission member 22 and twist one of the torsion arms 32, so that one end of the torsion spring 3 is deformed radially inward and separated from the inner wall of the housing 1, and when the first matching portion 211 and the second matching portion 221 are in contact, the second transmission member 22 can rotate with the first transmission member 21. When the reduction motor is working, the first transmission member 21 rotates under the drive of the reduction motor to twist the torsion arm 32, thereby causing one end of the torsion spring 3 to deform radially inward and separate from the inner wall of the outer shell 1 (that is, one end of the torsion spring 3 is separated from the inner wall of the outer shell 1, and the other end is in contact with the inner wall surface of the outer shell 1), so that the second transmission member 22 can rotate with the first transmission member 21, thereby driving the load. Since a part of the torsion spring 3 is always in contact with the inner wall surface of the outer shell 1 when the brake mechanism 100 is not braking, the brake mechanism 100 can brake and self-lock at the moment the reduction motor stops, thereby protecting the gears of the reduction box and performing position locking protection on the load. In this solution, the first transmission member 21 and the second transmission member 22 rotate coaxially along an axis, and the first transmission member 21 is connected to the output shaft end of the reduction motor. In this way, the rotational motion of the output shaft of the reduction motor is directly transmitted to the second transmission member 22 through the first transmission member 21 without passing through other intermediate transmissions. The braking stroke angle is small, and the accuracy of the output shaft is improved.

[0057] In order to ensure the stability of the relative rotation between the first transmission member 21 and the second transmission member 22 before the first matching portion 211 and the second matching portion 221 abut, a first rotation matching portion is provided between the first matching portion 211 and the second matching portion 221. Figures 5 to 8 As shown, the first transmission member 21 further includes a base 212 and a first matching column 213. The base 212 is provided at one end of the first matching portion 211 along its axial direction, and is used for driving connection with the reducer. The first matching column 213 is provided at the base 212, and a part of its outer side surface is adapted to the first matching portion 211; the second matching portion 221 is adapted to a part of the outer side surface of the first matching column 213 facing away from the first matching portion 211, so that the first transmission member 21 and the second transmission member 22 can be rotated and matched. Since the outer side surface of the first matching column 213 is respectively matched with the first matching portion 211 and the second matching portion 221, when the first transmission member 21 rotates relative to the second transmission member 22, the first matching column 213 rotates around the axis and slides with the second matching portion 221, which ensures the stability of the relative rotation of the first transmission member 21 and the second transmission member 22 on the one hand, and reduces the friction between the first matching column 213 and the second matching portion 221 on the other hand, which helps to extend the service life of the brake mechanism 100.

[0058] In order to further improve the stability of the relative rotation between the first transmission member 21 and the second transmission member 22, the second transmission member 22 is provided with a second rotation matching portion. Figure 7 and Figure 8 As shown, the end of the first matching portion 211 away from the base 212 is protruded from the end surface of the first matching column 213; the second transmission member 22 also includes a connection seat 222 and a second matching column 223, the connection seat 222 is arranged at the end of the second matching portion 221 facing away from the base 212, and is used to drive and connect with the load, the second matching column 223 is arranged on the end surface of the connection seat 222 facing the base 212, and the circumferential side surface of the second matching column 223 is respectively matched with the second matching portion 221 and the part of the first matching portion 211 protruding from the first matching column 213. In this way, when the first transmission member 21 rotates relative to the second transmission member 22, the first matching column 213 and the second matching column 223 both rotate around the axis, and slide with the second matching portion and the first matching portion 211 correspondingly. By setting the second matching column 223 to increase the contact area between the first transmission member 21 and the second transmission member 22, the stability of the relative rotation between the first transmission member 21 and the second transmission member 22 is further improved.

[0059] In this embodiment, if Figure 5 and Figure 8As shown, the base 212 and the connecting seat 222 are provided with a stopper 212b on one end surface facing each other, and the two stoppers 212b are respectively arranged at intervals from the two ends of the torsion spring body 31. In this way, the axial limit of the torsion spring 3 is increased to prevent the torsion spring 3 from loosening during rotation, thereby ensuring its installation stability.

[0060] In this embodiment, if Figure 1 As shown, the second transmission member 22 also includes a transmission shaft 224, which is arranged on the end face of the connection seat 222 facing away from the base 212, and is used to drive and connect with the load; the housing 1 includes a shell 11 and an end cover 12, the shell 11 is formed with an open accommodating chamber, which is used to accommodate the transmission assembly 2 and the torsion spring 3, and the end cover 12 is covered at the opening of the accommodating chamber, and the bottom wall of the accommodating chamber and the end cover 12 are both provided with through holes, and the two through holes are respectively used for the transmission shaft 224 and the output shaft of the reducer to pass through, and the end cover 12 is used to fix with the gear box of the reduction motor. In this way, the rotation of the reducer is transmitted to the second transmission member 22 through the first transmission member 21, and then transmitted to the load through the transmission shaft 224.

[0061] The specific connection method between the first transmission member 21 and the reduction motor is not limited. The output shaft of the reduction motor may be directly connected to the first transmission member 21, or the rotation of the reduction motor may be transmitted to the first transmission member 21 through a gear transmission mechanism. Figures 10 to 13As shown, the housing 11 includes a first housing 111 and a second housing 112, the first housing 111 is sleeved outside the second housing 112, and one end of the first housing 111 protrudes from the end surface of the second housing 112 to form an inner gear ring 111a, and the transmission assembly 2 is arranged in the second housing 112; the transmission assembly 2 also includes a gear transmission mechanism 23 arranged in the first housing 111 and outside the second housing 112, the gear transmission mechanism 23 includes a driving gear 231, a first gear transmission structure 232 and a second gear transmission structure 233, the driving gear 231 is used to be installed on the output shaft end of the reducer; the first gear transmission structure 232 includes a plurality of first gears 232a, a turntable 2 32b and a second gear 232c, the second gear 232c is rotatably mounted on the end surface of the turntable 232b facing the second shell 112, a plurality of first gears 232a are rotatably mounted on the end surface of the turntable 232b facing away from the second shell 112, and are arranged at intervals along the circumference of the turntable 232b, and a plurality of first gears 232a are respectively meshed with the driving gear 231 and the inner gear ring 111a; the second gear transmission structure 233 includes a plurality of third gears 233a, a plurality of third gears 233a are arranged at intervals along the circumference of the end surface of the base 212 facing away from the second matching portion 221, and are respectively meshed with the second gear 232c and the inner gear ring 111a. In this way, when the reducer is working, the driving gear 231 can be driven to rotate, and the driving gear 231 is simultaneously engaged with multiple first gears 232a to drive multiple first gears 232a to rotate and engage with the inner gear ring 111a, thereby causing the turntable 232b to rotate to drive the second gear 232c to rotate, and further through the engagement of the second gear 232c with multiple third gears 233a, the rotation of the reduction motor is transmitted to the first transmission member 21, so that the first transmission member 21 can drive the second transmission member 22 to rotate.

[0062] In this embodiment, if Figure 7 and Figure 8As shown, the first transmission member 21 also includes an arc-shaped guide portion 212a, which is provided on the base 212 and arranged along the same circumference as the first matching portion 211, and the guide portion 212a and the first matching column 213 are spaced apart; the second matching portion 221 is provided with a guide groove 221a on the end surface facing the base 212, and the side wall of the guide groove 221a passes through the outer side wall of the second matching portion 221, and the guide portion 212a extends into the guide groove 221a to guide the rotation of the second transmission member 22. In this way, through the sliding cooperation between the first cooperation and the second cooperation part 221, and the cooperation between the guide part 212a and the guide groove 221a, when the first transmission member 21 rotates along the axis, the first cooperation part 211 rotates toward the second accommodating groove 221b until it abuts against the second cooperation part 221, and the rotational cooperation area between the first transmission member 21 and the second transmission member 22 is further increased, so as to greatly improve the reliability of the relative rotation between the first transmission member 21 and the second transmission member 22, so as to ensure the coaxial rotation of the first transmission member 21 and the second transmission member 22.

[0063] Furthermore, in this embodiment, if Figure 7 and Figure 8 As shown, one end of the guide portion 212a is connected to the first matching portion 211, and the other end is spaced from the first matching portion 211 to form an insertion port between the first matching portion 211 and the guide portion 212a; a limiting convex portion 221c is formed on the second matching portion 221, and the limiting convex portion 221c extends into the insertion port to limit the rotation stroke of the first transmission member 21. In this way, when the first transmission member 21 rotates clockwise around the axis, the rotation stroke of the first transmission member 21 is limited by the limiting convex portion 221c, and when the first matching portion 211 and the second matching portion 221 abut, the limiting convex portion 221c abuts against the end of the guide portion 212a, so that the first transmission member 21 and the second transmission member 22 are relatively fixed, thereby improving the rotation consistency of the two.

[0064] In this embodiment, if Figure 7 As shown, a first receiving groove 211a is provided on one end surface of the first matching portion 211 facing the second matching portion 221, and the side of the first receiving groove 211a penetrates the first matching portion 211 to accommodate a torsion arm 32. In this way, the torsion arm 32 of the torsion spring 3 is accommodated through the first receiving groove 211a, so that when the first transmission member 21 rotates counterclockwise around the axis, the first matching portion 211 and the second matching portion 221 have a larger contact area when they abut against each other, thereby ensuring the reliability of transmission.

[0065] In this embodiment, if Figure 8 As shown, a second receiving groove 221b is provided on one end surface of the second matching portion 221 facing the first matching portion 211, and the side of the second receiving groove 221b penetrates the second matching portion 221 to accommodate the other torsion arm 32. In this way, the other torsion arm 32 of the torsion spring 3 is accommodated through the second receiving groove 221b, so that when the first transmission member 21 rotates clockwise around the axis, the first matching portion 211 rotates toward the second receiving groove 221b until it abuts against the second matching portion 221, so that the first matching portion 211 and the second matching portion 221 have a larger contact area when they abut, thereby ensuring the reliability of transmission.

[0066] In addition, the utility model also proposes a reduction motor, the reduction motor includes a brake mechanism 100, the specific structure of the brake mechanism 100, with reference to the above embodiment, the specific structure of the brake mechanism 100 is as follows: Figure 1 As shown, it can be understood that since the reduction motor of the utility model adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0067] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the concept of the utility model, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A brake mechanism, characterized in that: include: A housing, used to be fixed to the main body of the reduction motor; A transmission assembly, comprising a first transmission member and a second transmission member located in the housing and coaxially rotatable along an axis, the first transmission member and the second transmission member are respectively arranged on both sides of the axis and are correspondingly provided with a first matching portion and a second matching portion, the first matching portion and the second matching portion are spaced apart in the radial direction of the axis to form two gaps located between the first matching portion and the second matching portion and on both sides of the axis in the radial direction, the first transmission member is used to be drivingly connected to the reduction motor, and the second transmission member is used to be drivingly connected to a load; and, A torsion spring, comprising a torsion spring body sleeved outside the first transmission member and the second transmission member, and two torsion arms arranged at two ends of the torsion spring body, the two torsion arms respectively extending into the two gaps; Wherein, driven by the reduction motor, the first transmission member can rotate relative to the second transmission member and twist the torsion arm, so that one end of the torsion spring is deformed radially inward and separated from the inner wall of the outer shell, and when the first matching portion and the second matching portion are in contact, the second transmission member can rotate with the first transmission member.

2. The brake mechanism according to claim 1, characterized in that: The first transmission member further includes a base and a first matching column, wherein the base is disposed at one end of the first matching portion along its axial direction and is used for driving connection with the reducer, and the first matching column is disposed at the base, and a part of its outer side surface is adapted to the first matching portion; The second matching portion is adapted to a portion of an outer side surface of the first matching column that is away from the first matching portion, so that the first transmission member is rotationally matched with the second transmission member.

3. The brake mechanism according to claim 2, characterized in that: One end of the first matching portion facing away from the base is protruded from the end surface of the first matching column; The second transmission member also includes a connecting seat and a second matching column. The connecting seat is arranged at one end of the second matching portion facing away from the base for connecting to a load drive. The second matching column is arranged on the end surface of the connecting seat facing the base, and the peripheral side surface of the second matching column respectively matches with the second matching portion and the portion of the first matching portion protruding from the first matching column.

4. The brake mechanism according to claim 3, characterized in that: The second transmission member further comprises a transmission shaft, which is arranged on the end surface of the connecting seat facing away from the base, and is used for driving connection with the load; The housing includes a shell and an end cover, the shell is formed with an open accommodating chamber for accommodating the transmission assembly and the torsion spring, the end cover is arranged on the opening of the accommodating chamber, the bottom wall of the accommodating chamber and the end cover are both provided with through holes, the two through holes are respectively used for the transmission shaft and the output shaft of the reducer to pass through, and the end cover is used to be fixed to the gear box of the reduction motor.

5. The brake mechanism according to claim 4, characterized in that: The housing comprises a first housing and a second housing, the first housing is sleeved outside the second housing, and one end of the first housing protrudes from the end surface of the second housing to form an inner gear ring, and the transmission assembly is arranged in the second housing; The transmission assembly further includes a gear transmission mechanism disposed in the first housing and outside the second housing, the gear transmission mechanism including: A driving gear, used for being mounted on the output shaft end of the reducer; A first gear transmission structure includes a plurality of first gears, a rotating disk and a second gear, wherein the second gear is rotatably mounted on an end surface of the rotating disk facing the second housing, and a plurality of first gears are rotatably mounted on an end surface of the rotating disk facing away from the second housing and are spaced apart along the circumference of the rotating disk, and the plurality of first gears are respectively meshed with the driving gear and the inner gear ring; and, The second gear transmission structure includes a plurality of third gears, which are arranged at intervals along the circumference of the end surface of the base facing away from the second matching portion and are respectively meshed with the second gear and the inner gear ring.

6. The brake mechanism according to claim 2, characterized in that: The first transmission member further comprises an arc-shaped guide portion, the guide portion is arranged on the base and arranged along the same circumference as the first matching portion, and the guide portion and the first matching column are arranged at intervals; The second matching portion is provided with a guide groove on the end surface facing the base, and the side wall of the guide groove penetrates the outer side wall of the second matching portion. The guide portion extends into the guide groove to guide the rotation of the second transmission member.

7. The brake mechanism according to claim 6, characterized in that: One end of the guide portion is connected to the first matching portion, and the other end is spaced apart from the first matching portion to form an insertion opening between the first matching portion and the guide portion; A limiting protrusion is formed on the second matching portion, and the limiting protrusion extends into the insertion opening to limit the rotation stroke of the first transmission member.

8. The brake mechanism according to claim 1, characterized in that: A first accommodating groove is disposed on an end surface of the first matching portion facing the second matching portion, and a side edge of the first accommodating groove penetrates the first matching portion to accommodate a torsion arm.

9. The brake mechanism according to claim 1, characterized in that: A second accommodating groove is disposed on an end surface of the second matching portion facing the first matching portion, and a side edge of the second accommodating groove passes through the second matching portion to accommodate another of the torsion arms.

10. A reduction motor, characterized in that: Comprising a brake mechanism as described in any one of claims 1-9.

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