Handheld multi-function machine

Abstract

The present invention discloses a handheld multifunctional machine, comprising a swing mechanism and a motor, the handheld multifunctional machine further comprising a reduction box, one end of the reduction box is connected to the motor, the other end of the reduction box is connected to the swing mechanism, and the reduction box drives the swing mechanism to operate. By adding the reduction box to the swing machine, the transmission ratio of the swing machine is increased, the working efficiency is improved, and the processing of deeper holes and harder materials can be realized.

Description

Technical Field

[0001] The invention relates to the field of handheld electric tools, and in particular to a handheld multifunctional machine. Background Art

[0002] The output end of the swing machine (also called a multifunctional machine) is in the form of swinging, and the working heads driven mainly include saw blades, cutting discs, polishing discs, etc. The working heads used can be of different shapes, sizes, and materials, such as triangles, strips, circles, and sectors.

[0003] The transmission of the swing machine in the prior art is a primary transmission, and the swing frequency after transmission is consistent with the rotation frequency of the motor shaft. This will result in a small output torque, low working efficiency and severe vibration when cutting deeper holes or harder materials; and the eccentric shaft bearing is close to the grip, and due to the limitation of the installation space, the selected model is too small, the load capacity is small, the power of the machine cannot be increased, and the bearing life is also affected. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a handheld multifunctional machine to overcome the defect that the swing machine in the prior art adopts a primary transmission, resulting in a small output torque.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] A handheld multifunctional machine includes a swing mechanism and a motor. The feature of the handheld multifunctional machine is that the handheld multifunctional machine also includes a reduction box, one end of the reduction box is connected to the motor, and the other end of the reduction box is connected to the swing mechanism, and the reduction box drives the swing mechanism to operate.

[0007] In this solution, by adding a reduction box to the swing machine, the transmission ratio of the swing machine is increased, the working efficiency is improved, and the processing of deeper holes and harder materials can be achieved.

[0008] Preferably, the reduction box includes a first gear, a second gear and a drive shaft, the first gear is connected to the output shaft of the motor, the second gear is meshed with the first gear, the second gear is connected to one end of the drive shaft, the swing mechanism is connected to the other end of the drive shaft, and the diameter of the first gear is smaller than the diameter of the second gear. The first gear is driven to rotate by the motor, and the second gear is driven to rotate by the first gear, thereby driving the swing mechanism to operate. Through the above structural form, the transmission ratio of the swing machine is improved, thereby improving the working efficiency.

[0009] Preferably, the axis of the drive shaft is perpendicular to the axis of the output shaft of the motor.

[0010] Preferably, the swing mechanism includes an eccentric shaft and a first bearing, wherein the eccentric shaft is connected to the drive shaft of the reduction box, and the eccentric shaft is fixed to the inner ring of the first bearing. By setting the axis of the drive shaft to be perpendicular to the axial direction of the output shaft of the motor, it is convenient to connect the eccentric shaft of the swing mechanism with the drive shaft, so that the first bearing can achieve the swing function by using a conventional eccentric bearing, thereby saving the cost of parts and maintenance costs.

[0011] Preferably, the swing mechanism further includes a swing rod and a swing rod output shaft, wherein the swing rod output shaft is fixed to one end of the swing rod, and the other end of the swing rod cooperates with the first bearing to realize the swing of the swing rod. The eccentric rotation of the outer periphery of the first bearing is realized by the cooperation between the first bearing and the eccentric shaft, and the swing of the swing rod is realized by the cooperation between the swing rod and the first bearing, thereby realizing the swing of the swing rod output shaft.

[0012] Preferably, the axis of the swing arm output shaft is parallel to the axis of the eccentric shaft. By setting the axis of the swing arm output shaft to be parallel to the axis of the eccentric shaft, the swing function of the swing arm can be realized by using a conventional eccentric bearing as the first bearing, thereby reducing production costs and subsequent maintenance costs.

[0013] Preferably, the outer ring of the first bearing has a diameter of not less than 20 mm. Since the swing mechanism is far from the holding position and is less restricted by space, the bearing of the eccentric shaft, i.e., the first bearing, can be selected with a larger diameter, thereby increasing the life of the bearing and thus the life of the swing mechanism.

[0014] Preferably, the swing mechanism further comprises a bracket, and the bracket is detachably fixed to the housing of the reduction box. The swing mechanism and the reduction box are detachably connected through the bracket, so that when a working head needs to rotate, the swing mechanism can be removed from the reduction box, and the rotating working head can be installed on the driving shaft of the reduction box to work. In this way, not only the swing function but also the rotation function can be realized, so that one machine can be used for multiple purposes. For manufacturers, it saves production costs, and for users, they only need to buy one handheld tool to realize multiple functions, which also saves use costs.

[0015] Preferably, the bracket includes an annular fixing portion, the fixing portion has a notch, and both sides of the notch have strip-shaped protrusions protruding outward along the radial direction of the fixing portion, and two strip-shaped protrusions are respectively provided with oppositely arranged through holes, and the fixing portion is arranged on the outside of the shell of the reduction box, and bolts pass through the through holes on the two strip-shaped protrusions to fix the bracket to the reduction box. The annular fixing portion is used for circumferential limitation with the outer shell of the reduction box, and a notch is provided on the fixing portion to allow the fixing portion to be elastically deformed, thereby facilitating the fixing portion to be installed on the outside of the outer shell of the reduction box, and also facilitating the relative fixation of the fixing portion and the outer shell of the reduction box. Strip-shaped protrusions are provided on both sides of the notch for connecting bolts to fix the fixing portion to the reduction box.

[0016] Preferably, the end of the bracket away from the fixing portion has an open accommodating cavity, and the swing rod output shaft and one end of the swing rod are located in the accommodating cavity. The swing rod output shaft and one end of the swing rod are arranged in the accommodating cavity on the bracket, which is beneficial to protecting the output shaft and the swing rod on the one hand, and improving the integration of the swing mechanism and facilitating installation on the other hand.

[0017] Preferably, the swing mechanism further includes a second bearing, a third bearing and a balance block, wherein the second bearing is connected to the top end of the swing rod output shaft and is connected to the bracket, the balance block is located between the swing rod and the second bearing, the third bearing is connected to the swing rod output shaft and is located on the side of the swing rod away from the balance block, and the third bearing is located in the accommodating cavity and is connected to the bracket. The bearings are arranged at both ends of the swing rod output shaft to facilitate the smooth operation of the swing rod output shaft.

[0018] Preferably, the swing mechanism further comprises an upper cover and a lower cover, wherein a receiving cavity with an opening at one end is provided on the upper cover and the lower cover, and the openings on the receiving cavities on the upper cover and the lower cover are arranged opposite to each other, and the eccentric shaft and the first bearing are located in the receiving cavities of the upper cover and the lower cover, and the end of the eccentric shaft passes through the bottom surface of the lower cover and is exposed from the lower cover. The upper cover and the lower cover are used to protect the eccentric shaft and the first bearing, and at the same time improve the integration of the equipment, which is convenient for subsequent installation.

[0019] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0020] The positive progressive effect of the present invention is that the present invention increases the transmission ratio of the swing machine and improves the working efficiency by adding a reduction box to the swing machine, and can realize the processing of deeper holes and harder materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1FIG. 1 is a schematic structural diagram of a handheld multi-function device according to a preferred embodiment of the present invention.

[0022] Figure 2 It is a schematic diagram of the partial external structure of the handheld multi-function device according to a preferred embodiment of the present invention.

[0023] Figure 3 It is a partial cross-sectional structural schematic diagram of a handheld multi-function device according to a preferred embodiment of the present invention.

[0024] Figure 4 The figure is a schematic diagram of the external structure of the swing mechanism in the handheld multi-function machine according to the preferred embodiment of the present invention.

[0025] Figure 5 Schematic diagram of an exploded view of a swing mechanism in a handheld multi-function device according to a preferred embodiment of the present invention.

[0026] Figure 6 It is a schematic structural diagram of a cross section of a swing mechanism in a handheld multi-function device according to a preferred embodiment of the present invention.

[0027] Figure 7 For along Figure 6 Schematic diagram of the cross section of line AA in.

[0028] Figure 8 It is a schematic diagram of the position of the working head when the eccentric shaft in the swing mechanism of the handheld multifunctional machine in the preferred embodiment of the present invention rotates 90 degrees clockwise.

[0029] Fig. 9 It is a schematic diagram of the position of the working head when the eccentric shaft in the swing mechanism of the handheld multifunctional machine in the preferred embodiment of the present invention rotates 270 degrees clockwise.

[0030] Description of reference numerals:

[0031] Swing mechanism 10

[0032] Eccentric shaft 101

[0033] First bearing 102

[0034] Swing rod 103

[0035] Connection part 1031

[0036] Fork 1032

[0037] Rocker output shaft 104

[0038] Bracket 105

[0039] Fixed part 1051

[0040] Gap 1052

[0041] Strip protrusion 1053

[0042] Second bearing 106

[0043] The third bearing 107

[0044] Balance weight 108

[0045] Upper cover 109

[0046] Lower cover 110

[0047] Working head 111

[0048] Fastening screw 112

[0049] Gearbox 20

[0050] First Gear 201

[0051] Second gear 202

[0052] Drive shaft 203

[0053] Housing 204

[0054] Output shaft of motor 30

[0055] Handle 40 DETAILED DESCRIPTION

[0056] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.

[0057] like Figures 1 to 9 As shown, the present embodiment provides a handheld multifunctional machine, which includes a swing mechanism 10 and a motor, and the handheld multifunctional machine also includes a reduction box 20. The reduction box 20 includes a first gear 201, a second gear 202 and a drive shaft 203, the first gear 201 is fixed to the output shaft 30 of the motor, the second gear 202 is meshed with the first gear 201, one end of the drive shaft 203 in the reduction box 20 is fixed to the second gear 202, and the swing mechanism 10 is swingably connected to the other end of the drive shaft 203. The reduction box 20 is used to drive the swing mechanism 10 to operate. By adding the reduction box 20 to the swing machine, the transmission ratio of the swing machine is improved, the work efficiency is improved, and the processing of deeper holes and harder materials can be achieved. The second gear 202 is driven to rotate by the first gear 201, thereby driving the swing mechanism 10 to operate. Through the above structural form, the transmission ratio of the swing machine is improved, thereby improving the work efficiency.

[0058] The diameter of the first gear 201 is smaller than that of the second gear 202. A bearing is also provided at the end of the drive shaft 203 away from the swing mechanism 10, the outer ring of the bearing is fixed to the housing 204 of the reduction box 20, and the inner ring of the bearing is fixed to the drive shaft 203 in the reduction box 20. A bearing is also provided between the second gear 202 and the swing mechanism 10, the outer ring of the bearing is fixed to the housing 204 of the reduction box 20, and the inner ring of the bearing is fixed to the drive shaft 203. This arrangement is conducive to improving the stability of the drive shaft 203.

[0059] In this embodiment, the axis of the drive shaft 203 of the reduction box 20 is perpendicular to the axis of the output shaft 30 of the motor, and it is obvious that the two can also adopt a parallel structure. The two are perpendicular to each other. On the one hand, it is convenient to lay out the swing mechanism 10, so that the output shaft of the swing mechanism 10 and the eccentric shaft 101 of the swing mechanism 10 are parallel to each other, so that the bearing connected to the eccentric shaft 101, that is, the first bearing 102, adopts a conventional eccentric shaft 101 bearing to realize the swing function of the swing mechanism 10; on the other hand, it makes the handle 40 of the handheld multifunctional machine perpendicular to the working end, which is convenient for the staff to hold and apply force.

[0060] The swing mechanism 10 includes an upper cover 109 and a lower cover 110. The upper cover 109 and the lower cover 110 are provided with a receiving cavity with one end open. The openings of the receiving cavities on the upper cover 109 and the lower cover 110 are arranged opposite to each other, and the receiving cavities on the two covers are enclosed into a large receiving cavity. In addition, through holes are provided at the top of the upper cover 109 and at the bottom of the lower cover 110. The swing mechanism 10 includes an eccentric shaft 101 and a first bearing 102. In this embodiment, as shown in FIG. Figure 3 As shown, the eccentric shaft 101 and the first bearing 102 are both disposed in the accommodation cavity surrounded by the upper and lower covers 110. Figure 5As shown, a limit plate is provided in the middle of the eccentric shaft 101, a step shaft is provided on the upper part of the limit plate, a countersunk hole is provided inside the step shaft, the axis of the countersunk hole deviates from the axis of the step shaft, and the axis of the countersunk hole is parallel to the axis of the step shaft. Below the limit plate, a tapered shaft is provided, wherein the diameter of the top of the tapered shaft is greater than the diameter of the bottom, a short shaft is connected to the bottom of the tapered shaft, and an inner hexagonal hole is provided at the bottom of the short shaft. The eccentric shaft 101 also includes a connecting shaft, one end of the connecting shaft is provided with an external thread, the countersunk hole on the step shaft is provided with an internal thread, and the connecting shaft is threadedly connected with the countersunk hole on the step shaft. A countersunk hole is provided at one end of the drive shaft 203 of the reduction box 20 away from the second gear 202, and the end of the connecting shaft is plugged into the drive shaft 203 of the reduction box 20. The two ends of the eccentric shaft 101 are respectively exposed at the two ends of the upper cover body 109 and the lower cover body 110. The upper cover 109 and the lower cover 110 are used to protect the eccentric shaft 101 and the first bearing 102, and at the same time improve the integration of the equipment, which is convenient for subsequent installation. The eccentric shaft 101 is fixed to the inner ring of the first bearing 102. When the inner ring of the first bearing 102 rotates with the eccentric shaft 101, under the action of the eccentric shaft 101, the outer ring of the first bearing 102 rotates back and forth within a certain angle range with the rotation of the eccentric shaft 101. The swing mechanism also includes a working head, and the working head 111 is connected to the bottom end of the swing arm output shaft and is fixed to the swing arm output shaft by a fastening screw 112.

[0061] The swing mechanism 10 also includes a swing rod 103 and a swing rod output shaft 104. The swing rod output shaft 104 is fixed to one end of the swing rod 103, and the other end of the swing rod 103 is fixed to the outer ring of the first bearing 102 to realize the swing of the swing rod 103. The outer periphery of the first bearing 102 rotates back and forth within a certain range through the cooperation between the first bearing 102 and the eccentric shaft 101, and the swing of the swing rod 103 is realized through the cooperation between the swing rod 103 and the first bearing 102, thereby realizing the swing of the swing rod output shaft 104. Among them, the axis of the swing rod output shaft 104 is parallel to the axis of the eccentric shaft 101. By setting the axis of the swing rod output shaft 104 to be parallel to the axis of the eccentric shaft 101, the first bearing 102 adopts a conventional eccentric shaft 101 bearing to realize the swing function of the swing rod 103, thereby reducing the production cost and subsequent maintenance cost.

[0062] The outer ring of the first bearing has a diameter of not less than 20 mm. Since the swing mechanism is far from the gripping position and is less restricted by space, the bearing of the eccentric shaft, i.e., the first bearing, can be selected with a larger diameter, thereby increasing the life of the bearing and thus the life of the swing mechanism.

[0063] Specifically, the swing rod 103 includes a connecting portion 1031 and a shift fork 1032. One end of the shift fork 1032 is fixed to the connecting portion 1031. Two opposite inner side surfaces of the other end of the shift fork 1032 are clamped with the first bearing 102. The connecting portion 1031 is fixed to the swing rod output shaft 104. The two side surfaces of the shift fork 1032 away from the output shaft are clamped with the first bearing 102, so that the first bearing 102 drives the shift fork 1032 to swing, thereby realizing the swing of the connecting portion 1031. The connecting portion 1031 and the swing rod output shaft 104 can be integrated or separated. In this embodiment, the separated type is adopted for easy production and maintenance.

[0064] The swing mechanism 10 also includes a bracket 105, which is detachably fixed to the housing of the reduction box 20. The swing mechanism 10 is detachably connected to the reduction box 20 through the bracket 105, so that when the working head 111 needs to rotate, the swing mechanism 10 can be removed from the reduction box 20, and the rotating working head can be installed on the driving shaft 203 of the reduction box 20 to work. In this way, not only the swing function can be realized, but also the rotation function can be realized, so that one machine can be used for multiple purposes. For manufacturers, production costs are saved, and for users, only one handheld tool needs to be purchased to realize multiple functions, which also saves usage costs.

[0065] The bracket 105 includes an annular fixing portion 1051, which has a notch 1052. Both sides of the notch 1052 have strip-shaped protrusions 1053 protruding outward along the radial direction of the fixing portion 1051. Two strip-shaped protrusions 1053 are respectively provided with oppositely arranged through holes. The fixing portion 1051 is annularly arranged outside the housing of the reduction box 20. Bolts pass through the through holes on the two strip-shaped protrusions 1053 to fix the bracket 105 to the reduction box 20. The annular fixing portion 1051 is used for circumferentially limiting the outer shell 204 of the reduction box 20. The notch 1052 is provided on the fixing portion 1051 to allow the fixing portion 1051 to be elastically deformed, thereby facilitating the fixing portion 1051 to be installed outside the outer shell 204 of the reduction box 20, and also facilitating the relative fixation of the fixing portion 1051 and the outer shell 204 of the reduction box 20. Strip-shaped protrusions 1053 are provided on both sides of the notch 1052 for connecting bolts to fix the fixing portion 1051 to the reduction box 20 .

[0066] Furthermore, the end of the bracket 105 away from the fixing portion 1051 has an open accommodating cavity, and the swing rod output shaft 104 and one end of the swing rod 103 are located in the accommodating cavity. The output shaft of the swing rod 103 and one end of the swing rod 103 are arranged in the accommodating cavity on the bracket 105, which is beneficial to protecting the output shaft and the swing rod 103 on the one hand, and improving the integration of the swing mechanism 10 and facilitating installation on the other hand.

[0067] In this embodiment, the swing mechanism 10 further includes a second bearing 106, a third bearing 107 and a balance block 108, wherein the second bearing 106 is connected to the top of the swing rod output shaft and is connected to the bracket 105, the balance block 108 is located between the swing rod 103 and the second bearing 106, the third bearing 107 is connected to the swing rod output shaft and is located on the side of the swing rod 103 away from the balance block 108, and the third bearing 107 is located in the accommodating cavity and is connected to the bracket 105. The bearings are arranged at both ends of the swing rod output shaft to facilitate the smooth operation of the swing rod output shaft. Among them, the eccentric shaft 101 and the balance block 108 can be integral, or can be an assembly formed by assembling two independent parts.

[0068] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A handheld multifunctional machine, comprising a swing mechanism and a motor, It is characterized in that The handheld multi-function machine also includes a reduction gearbox, one end of which is connected to the motor, and the other end of which is connected to the swing mechanism. The reduction gearbox drives the swing mechanism to operate, and the swing mechanism includes an eccentric shaft and a first bearing. The eccentric shaft is connected to the driving shaft of the reduction gearbox, and the eccentric shaft is fixed to the inner ring of the first bearing. A limit plate is arranged in the middle of the eccentric shaft, and a step shaft is arranged on the upper part of the limit plate. The first bearing is sleeved on the step shaft, and a countersunk hole is arranged inside the step shaft. The axis of the countersunk hole deviates from the axis of the step shaft, and the axis of the countersunk hole is parallel to the axis of the step shaft. The diameter of the outer ring of the first bearing is not less than 20 mm.

2. The handheld multifunctional machine as claimed in claim 1, It is characterized in that The reduction gearbox includes a first gear, a second gear and a drive shaft, the first gear is connected to the output shaft of the motor, the second gear is meshed with the first gear, the second gear is connected to one end of the drive shaft, the swing mechanism is connected to the other end of the drive shaft, and the diameter of the first gear is smaller than the diameter of the second gear.

3. The handheld multifunctional machine as claimed in claim 2, It is characterized in that The axis of the drive shaft is perpendicular to the axis of the output shaft of the motor.

4. The handheld multifunctional machine as claimed in claim 1, It is characterized in that The swing mechanism further includes a swing rod and a swing rod output shaft. The swing rod output shaft is fixed to one end of the swing rod, and the other end of the swing rod cooperates with the first bearing to realize the swing of the swing rod.

5. The handheld multifunctional machine as claimed in claim 4, It is characterized in that The axis of the rocker output shaft is parallel to the axis of the eccentric shaft.

6. The handheld multifunctional machine as claimed in claim 4, It is characterized in that The swing mechanism further comprises a bracket, and the bracket is detachably fixed to the housing of the reduction box.

7. The handheld multifunctional machine as claimed in claim 6, It is characterized in that The bracket includes an annular fixing portion having a notch, and both sides of the notch have strip-shaped protrusions protruding outward along the radial direction of the fixing portion, and two strip-shaped protrusions are respectively provided with oppositely arranged through holes, and the fixing portion is annularly arranged on the outside of the shell of the reduction box, and bolts pass through the through holes on the two strip-shaped protrusions to fix the bracket to the reduction box.

8. The handheld multifunctional machine as claimed in claim 7, It is characterized in that The bracket has an end facing away from the fixing portion and has a receiving cavity with one end open, and the swing rod output shaft and one end of the swing rod are located in the receiving cavity.

9. The handheld multifunctional machine as claimed in claim 8, It is characterized in that The swing mechanism also includes a second bearing, a third bearing and a balancing block, wherein the second bearing is connected to the top end of the swing arm output shaft and is connected to the bracket, the balancing block is located between the swing arm and the second bearing, the third bearing is connected to the swing arm output shaft and is located on the side of the swing arm away from the balancing block, and the third bearing is located in the accommodating cavity and is connected to the bracket.

10. The handheld multifunctional machine as claimed in claim 1, It is characterized in that The swing mechanism also includes an upper cover body and a lower cover body, and a receiving cavity with an opening at one end is provided on the upper cover body and the lower cover body, and the openings on the receiving cavity on the upper cover body and the lower cover body are arranged opposite to each other, and the eccentric shaft and the first bearing are located in the receiving cavity of the upper cover body and the lower cover body, and the end of the eccentric shaft passes through the bottom surface of the lower cover body and is exposed from the lower cover body.

Images