A brushless linear stepper motor with transmission mechanism

Abstract

The utility model discloses a brushless linear stepper motor with a transmission mechanism, and the utility model relates to the technical field of stepper motors. It includes a base plate; a motor assembly, the motor assembly is fixed on the other end of the upper surface of the base plate; a linear drive assembly, the linear drive assembly is arranged at one end of the upper surface of the base plate; and a linear moving assembly is arranged on the linear drive assembly. The brushless linear stepper motor with a transmission mechanism is provided with a motor assembly on the base plate, the motor output shaft on the motor assembly is connected to the slot of the ball screw on the linear drive assembly through a connector, and is limited by a limit bar and a limit notch, so that the motor can drive the ball screw to rotate, and is convenient for quick disassembly, the ball screw is limited by a movable plate, and the movable plate is limited by a screw in a protrusion and a screw groove in a linear groove, so that the movable plate can maintain a stable limit, thereby enabling the device to maintain stable operation.

Description

Technical Field

[0001] The utility model relates to the technical field of stepping motors, in particular to a brushless linear stepping motor with a transmission mechanism. Background Art

[0002] Miniature brushless or stepper motors are widely used in the field of motion control. When used, they need to be combined with some screws or ball screws outside the motor to directly convert rotational motion into linear motion.

[0003] The utility model with publication number CN 209860723 U discloses a brushless or stepper motor with a linear transmission mechanism, including a rotor, a stator, a front cover, a rear cover, a front bearing, a rear bearing and a linear transmission mechanism, wherein a through hole matching the linear transmission mechanism is provided inside the rotor.

[0004] According to the above utility model, the existing brushless or stepper motor generally has a connecting groove at one end of its rotor for connecting to an external screw rod. This method reduces a certain axial space. However, the existing motor is generally connected to the external screw rod by strong glue bonding or welding. This connection method makes it inconvenient to disassemble the screw rod when it is damaged or the motor needs maintenance. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a brushless linear stepper motor with a transmission mechanism, which solves the above-mentioned problems.

[0006] To achieve the above purpose, the utility model is implemented through the following technical solutions: a brushless linear stepper motor with a transmission mechanism, comprising:

[0007] A bottom plate, wherein both sides of an upper surface of one end of the bottom plate are provided with limited sliding grooves, and a linear groove is provided in the middle of an upper surface of one end of the bottom plate;

[0008] A motor assembly, the motor assembly is fixed to the other end of the upper surface of the bottom plate, the motor assembly includes a fixing plate and a stepping motor mounted thereon, and is used for driving;

[0009] A linear drive assembly, the linear drive assembly is arranged at one end of the upper surface of the base plate, the linear drive assembly includes a movable plate, one side of the movable plate is movably connected to a ball screw through a bearing, one end of the ball screw is connected to the output shaft of the motor, and is used to convert the rotation drive of the motor into a linear drive;

[0010] A linear motion component is arranged on a linear drive component, and the linear motion component includes a mounting plate, a ball sleeve is fixed to the middle of the lower surface of the mounting plate, and the ball sleeve is sleeved on the outer side of the ball screw for linear movement according to the driving force of the ball screw.

[0011] Preferably, the motor assembly includes a fixing plate fixed to the other end of the upper surface of the base plate, a stepper motor is mounted on one side of the fixing plate by bolts, fixing sleeves are fixed at both ends of the other side of the fixing plate, the output shaft of the stepper motor passes through the fixing plate and is movably connected to the fixing plate through bearings, a connecting head is fixed to the end of the output shaft of the stepper motor, and a plurality of limit strips distributed in a circular array are fixed on the circumferential side of the connecting head.

[0012] Preferably, the linear drive assembly includes a movable plate arranged at the other end of the upper surface of the base plate, two symmetrically distributed reinforcing plates are fixed to the lower end of one side of the movable plate, limiting sliders are fixed at both ends of the bottom of the movable plate, the limiting sliders are located in the limiting slide groove, a protrusion is fixed to the middle part of the bottom of the movable plate, the protrusion is located in the linear groove, the middle part of the protrusion is connected with a screw rod through a bearing, and one end of the screw rod is inserted into the screw groove.

[0013] Preferably, a ball screw is movably connected to the middle part of one side of the movable plate through a bearing, a slot is provided at one end of the ball screw, a plurality of limit slots distributed in a circular array are provided on the inner wall of the slot, one end of the connecting head is inserted into the slot, and the limit strip on the connecting head is adapted to the limit slot.

[0014] Preferably, guide rods are fixed at both ends of one side of the movable plate, and one end of the guide rod is inserted into a fixing sleeve on the fixing plate.

[0015] Preferably, the linear motion component includes a mounting plate, a ball sleeve is fixed in the middle of the lower surface of the mounting plate, the ball sleeve is sleeved on the outer side of the ball screw, a U-shaped plate is fixed at the four corners of the lower surface of the mounting plate through a fixing block, the U-shaped plate is inverted and arranged above the guide rod, a plurality of ball grooves distributed at equal intervals are opened on the U-shaped plate, balls are arranged inside the ball grooves, and the balls are in contact with the outer wall of the guide rod.

[0016] Beneficial Effects

[0017] The utility model provides a brushless linear stepper motor with a transmission mechanism. Compared with the prior art, it has the following beneficial effects:

[0018] 1. The brushless linear stepper motor with a transmission mechanism is provided with a motor assembly on the bottom plate. The motor output shaft on the motor assembly is connected to the slot of the ball screw on the linear drive assembly through a connector, and is limited by a limit bar and a limit notch, so that the motor can drive the ball screw to rotate and is easy to disassemble quickly. The ball screw is limited by a movable plate, and the movable plate is limited by a screw in a convex block and a screw groove in a linear groove, so that the movable plate can maintain a stable limit position, thereby allowing the device to maintain smooth operation.

[0019] 2. The brushless linear stepper motor with a transmission mechanism is provided with a guide rod on the movable plate. The guide rod cooperates with the fixed sleeve to improve the stability of the movable plate. A mounting plate is connected to the ball screw through a ball sleeve. U-shaped plates are fixed on both sides of the mounting plate. The U-shaped plates are connected to the guide rod through balls, which reduces friction and enhances stability, thereby improving the stability of the linear movement of the mounting plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the bottom plate structure of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the motor assembly of the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the linear drive assembly of the utility model;

[0024] Figure 5 It is a schematic diagram of the structure of the linear moving component of the utility model.

[0025] In the figure: base plate 1, limiting slide groove 11, linear groove 12, screw groove 13, motor assembly 2, fixed plate 21, stepping motor 22, fixed sleeve 23, connector 24, limiting strip 25, linear drive assembly 3, movable plate 31, reinforcing plate 32, limiting slider 33, bump 34, screw 35, ball screw 36, slot 361, limiting notch 362, guide rod 37, linear moving assembly 4, mounting plate 41, ball sleeve 42, U-shaped plate 43, ball groove 44, ball 45. DETAILED DESCRIPTION

[0026] 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 in 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.

[0027] The utility model provides two technical solutions:

[0028] Figure 1-4 The first embodiment is shown: a brushless linear stepper motor 22 with a transmission mechanism, including a base plate 1, with limit grooves 11 on both sides of one end of the upper surface of the base plate 1, and a linear groove 12 in the middle of one end of the upper surface of the base plate 1.

[0029] The motor assembly 2 is fixed at the other end of the upper surface of the base plate 1. The motor assembly 2 includes a fixed plate 21 and a stepper motor 22 installed thereon for driving. The motor assembly 2 includes a fixed plate 21 fixed at the other end of the upper surface of the base plate 1. The stepper motor 22 is installed on one side of the fixed plate 21 by bolts. Fixed sleeves 23 are fixed at both ends of the other side of the fixed plate 21. The output shaft of the stepper motor 22 passes through the fixed plate 21 and is movably connected to the fixed plate 21 through bearings. A connector 24 is fixed at the end of the output shaft of the stepper motor 22. A plurality of limit strips 25 distributed in a circular array are fixed on the peripheral side of the connector 24. The stepper motor 22 drives the connector 24 to rotate.

[0030] A linear drive assembly 3 is arranged at one end of the upper surface of the base plate 1. The linear drive assembly 3 includes a movable plate 31. A ball screw 36 is movably connected to one side of the movable plate 31 through a bearing. One end of the ball screw 36 is connected to the output shaft of the motor for converting the rotational drive of the motor into a linear drive. The linear drive assembly 3 includes a movable plate 31 arranged at the other end of the upper surface of the base plate 1. Two symmetrically distributed reinforcing plates 32 are fixed to the lower end of one side of the movable plate 31. The arrangement of the reinforcing plates 32 improves the compressive strength of the movable plate 31. Limiting sliders 33 are fixed at both ends of the bottom of the movable plate 31. The limiting slider 33 is located in the limiting slide groove 11, which further improves the compressive strength of the movable plate 31. A protrusion 34 is fixed to the middle part of the bottom of the movable plate 31. The protrusion 34 is located in the linear groove 12. The middle part of the protrusion 34 is penetrated by the bearing A screw rod 35 is connected, one end of the screw rod 35 is inserted into the screw groove 13, and the screw rod 35 cooperates with the screw groove 13 to play a limiting role, keeping the movable plate 31 limited on the base plate 1, and a ball screw 36 is movably connected to the middle part of one side of the movable plate 31 through a bearing, and a slot 361 is provided at one end of the ball screw 36, and a plurality of limiting notches 362 distributed in a circular array are provided on the inner wall circumference of the slot 361, and one end of the connector 24 is inserted into the slot 361, and the limiting strip 25 on the connector 24 is adapted to the limiting notch 362, which plays a limiting role, so that the motor can drive the ball screw 36 to rotate through the connector 24, and guide rods 37 are fixed at both ends of one side of the movable plate 31, and one end of the guide rod 37 is inserted into the fixing sleeve 23 on the fixing plate 21, and the guide rod 37 cooperates with the fixing sleeve 23 to improve the stability of the movable plate 31.

[0031] Figure 1 and 5A second embodiment is shown, which is mainly different from the first embodiment in that it includes a linear motion component 4, which is arranged on the linear drive component 3, and the linear motion component 4 includes a mounting plate 41, a ball 45 sleeve 42 is fixed in the middle of the lower surface of the mounting plate 41, and the ball 45 sleeve 42 is sleeved on the outer side of the ball screw 36, and is used to perform linear movement according to the driving force of the ball screw 36. The linear motion component 4 includes a mounting plate 41, a ball 45 sleeve 42 is fixed in the middle of the lower surface of the mounting plate 41, and the ball 45 sleeve 42 is sleeved on the outer side of the ball screw 36, and the mounting plate A U-shaped plate 43 is fixed at the four corners of the lower surface of 41 through a fixing block. The U-shaped plate 43 is inverted and arranged above the guide rod 37. The U-shaped plate 43 cooperates with the guide rod 37 to play a guiding role, so that the mounting plate 41 maintains linear movement, and at the same time plays a certain supporting role for the mounting plate 41. A plurality of ball 45 grooves 44 distributed at equal intervals are opened on the U-shaped plate 43. Balls 45 are arranged inside the ball 45 grooves 44. The balls 45 fit against the outer wall of the guide rod 37. The arrangement of the balls 45 reduces the friction between the U-shaped plate 43 and the guide rod 37, so that the mounting plate 41 is easy to move.

[0032] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used.

[0033] When in use, first fix the stepper motor 22 on the fixed plate 21 with bolts, at this time, the connector 24 on the stepper motor 22 penetrates the bearing on the fixed plate 21, then the ball bearing 45 sleeve 42 on the mounting plate 41 is sleeved on the outer side of the ball screw 36, at this time, the U-shaped plate 43 fits with the guide rod 37 through the ball bearing 45, then the limit slider 33 on the movable plate 31 is inserted into the limit slide groove 11 on the bottom plate 1, at this time, the protrusion 34 is located in the linear groove 12, until the screw 35 contacts the screw groove 13, and then the screw 33 is turned. 5. The screw rod 35 cooperates with the screw groove 13 to drive the movable plate 31 to move, and the movable plate 31 is limited on the bottom plate 1 until one end of the guide rod 37 is inserted into the fixed sleeve 23. At this time, the connector 24 is inserted into the slot 361, and the limit strip 25 on the connector 24 is adapted to the limit notch 362 in the slot 361, so that the stepper motor 22 can drive the ball screw 36 to rotate through the connector 24, and then drive the ball 45 sleeve 42 to move linearly on the ball screw 36, and the ball 45 sleeve 42 drives the mounting plate 41 to move linearly.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A brushless linear stepper motor with a transmission mechanism, characterized in that: include: A bottom plate, wherein both sides of an upper surface of one end of the bottom plate are provided with limited sliding grooves, and a linear groove is provided in the middle of an upper surface of one end of the bottom plate; A motor assembly, the motor assembly is fixed to the other end of the upper surface of the bottom plate, the motor assembly includes a fixing plate and a stepping motor mounted thereon, and is used for driving; A linear drive assembly, the linear drive assembly is arranged at one end of the upper surface of the base plate, the linear drive assembly includes a movable plate, one side of the movable plate is movably connected to a ball screw through a bearing, one end of the ball screw is connected to the output shaft of the motor, and is used to convert the rotation drive of the motor into a linear drive; A linear motion component is arranged on a linear drive component, and the linear motion component includes a mounting plate, a ball sleeve is fixed to the middle of the lower surface of the mounting plate, and the ball sleeve is sleeved on the outer side of the ball screw for linear movement according to the driving force of the ball screw.

2. The brushless linear stepper motor with a transmission mechanism according to claim 1, characterized in that: The motor assembly includes a fixing plate fixed to the other end of the upper surface of the base plate, a stepper motor is mounted on one side of the fixing plate by bolts, fixing sleeves are fixed at both ends of the other side of the fixing plate, the output shaft of the stepper motor passes through the fixing plate and is movably connected to the fixing plate by bearings, a connector is fixed to the end of the output shaft of the stepper motor, and a plurality of limit strips distributed in a circular array are fixed to the circumferential side of the connector.

3. The brushless linear stepper motor with a transmission mechanism according to claim 1, characterized in that: The linear drive assembly includes a movable plate arranged at the other end of the upper surface of the base plate, two symmetrically distributed reinforcing plates are fixed to the lower end of one side of the movable plate, limiting sliders are fixed at both ends of the bottom of the movable plate, the limiting sliders are located in the limiting slide groove, a protrusion is fixed to the middle part of the bottom of the movable plate, the protrusion is located in the linear groove, the middle part of the protrusion is connected with a screw rod through a bearing, and one end of the screw rod is inserted into the screw groove.

4. The brushless linear stepper motor with a transmission mechanism according to claim 3, characterized in that: A ball screw is movably connected to the middle part of one side of the movable plate through a bearing, a slot is provided at one end of the ball screw, a plurality of limit slots distributed in a circular array are provided on the inner wall of the slot, one end of a connector is inserted into the slot, and the limit strip on the connector is matched with the limit slot.

5. The brushless linear stepper motor with a transmission mechanism according to claim 3, characterized in that: Guide rods are fixed at both ends of one side of the movable plate, and one end of the guide rod is inserted into a fixing sleeve on the fixing plate.

6. The brushless linear stepper motor with a transmission mechanism according to claim 1, characterized in that: The linear motion component includes a mounting plate, a ball sleeve is fixed in the middle of the lower surface of the mounting plate, the ball sleeve is sleeved on the outer side of the ball screw, a U-shaped plate is fixed at the four corners of the lower surface of the mounting plate through a fixing block, the U-shaped plate is inverted and arranged above the guide rod, a plurality of ball grooves distributed at equal intervals are opened on the U-shaped plate, balls are arranged inside the ball grooves, and the balls are in contact with the outer wall of the guide rod.

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