Jig for input gear alignment

Abstract

A jig for aligning an input gear is disclosed. The jig for aligning an input gear according to the present embodiment is an input gear alignment jig for assembling an input gear of a motor and a spur gear of a reduction gear, and may be provided by including a first plate in an annular shape that is formed to be fixed to the motor connection side of the reduction gear, including a first plate hole provided in the center, and a second plate that is formed to protrude from one surface of a base part so as to be inserted into the first plate hole and to fix an input gear, and is provided such that the input gear fixing part is inserted into the first plate hole and one surface of the base part is supported on one surface of the first plate.

Description

Technology Field

[0001] The present invention relates to a jig for aligning an input gear, and more specifically, to a jig for aligning an input gear that can prevent tooth profile breakage and align to an accurate coupling position during assembly between the input gear of a motor and the spur gear of a reduction gear. Background Technology

[0002] Generally, industrial robots include a motor that generates power and a reduction gear that adjusts the power generated by the motor to the required rotational speed. These motor and reduction gear are coupled such that the input gear provided in the motor meshes with the spur gear provided in the reduction gear, thereby providing the power required for the industrial robot.

[0003] FIG. 1 is a perspective view showing the state before the motor and the reduction gear are connected, and FIG. 2 is a cross-sectional view showing the state after the motor and the reduction gear are connected.

[0004] Referring to FIGS. 1 and 2, the motor (10) may include a drive shaft (11) that outputs rotational force and an input gear (12) that is coupled to the drive shaft (11) and rotates together with the drive shaft (11). More specifically, the drive shaft (11) may include a drive shaft key (11a) that is formed protruding from one side of the outer surface. Additionally, the input gear (12) may include a gear portion (12a) that transmits rotational force to a reduction gear (20), a drive shaft fastening hole (12b) provided for coupling with the drive shaft (11), and a key groove (12c) provided on the side of the drive shaft fastening hole (12b) so that the drive shaft key (11a) can be inserted. Additionally, the motor (10) may further include a motor fastening bolt (13) for fixing to the reduction gear (20).

[0005] Meanwhile, the reduction gear (20) may include a spur gear (21) that receives rotational force from an input gear (12) configured as described above, and a motor connection part (22) for connection with a motor (10). Here, the motor connection part (22) may include an input gear insertion hole (22a) formed through the spur gear (21) side so that the input gear (12) can mesh with the spur gear (21), and a motor connection bolt hole (22b) provided so that a motor connection bolt (13) is fastened so that the motor (10) can be fixed to the reduction gear (20) while one side of the motor (10) is seated on the motor connection part (22).

[0006] In the conventional case, when combining such a motor (10) and a reduction gear (20), the input gear (12) is inserted into the input gear insertion hole (22a), and the tooth profile between the input gear (12) and the spur gear (21) is not exposed to the outside. Therefore, the operator adjusts the alignment position of the input gear (12) by rotating the motor (10) around the rotation axis of the input gear (12) so that the tooth profiles between the input gear (12) and the spur gear (21) mesh. At this time, tooth profiles of the input gear (12) and the spur gear (21) are damaged, and such damage to the tooth profiles of the input gear (12) and the spur gear (21) causes noise or sounds during operation after assembly is completed, leading to quality issues with the industrial robot. The problem to be solved

[0007] The present embodiment aims to provide an input gear alignment jig that prevents tooth profile breakage and aligns the input gear of a motor and the spur gear of a reduction gear to an accurate coupling position during assembly. means of solving the problem

[0008] According to one embodiment of the present invention, an input gear alignment jig for assembling an input gear of a motor and a spur gear of a reduction gear may be provided, comprising: an annular first plate formed to be fixed to the motor fastening side of the reduction gear including a first plate hole formed in the center; and a second plate formed to protrude from one surface of a base part so as to be inserted into the first plate hole, wherein the input gear fixing part is fixed to the input gear, and wherein the input gear fixing part is inserted into the first plate hole so as to be supported on one surface of the base part.

[0009] The first plate may include at least two fixing arms that are formed to protrude radially with respect to the center of the first plate hole and fix the first plate to the motor fastening part.

[0010] The above fixed arm may include a fixed arm hole provided on the end side and a fixed pin that is coupled through the fixed arm hole and inserted into a motor fastening bolt fastening hole provided on the motor fastening part side.

[0011] The above input gear fixing portion may include a first protrusion formed protruding from one surface of the base portion and inserted and fixed into the first plate hole, and a second protrusion formed protruding from one surface of the first protrusion and inserted and fixed into a drive shaft fastening hole provided in the input gear.

[0012] The above input gear fixing part further includes a key that is formed protrudingly on the outer surface side of the second protrusion and inserted into a key groove provided on the drive shaft fastening hole side, and the key can be arranged in a straight line with the tooth profile of the input gear in the axial direction of the input gear.

[0013] The second plate may further include a second plate hole formed penetrating from the base portion through the first protrusion to the second protrusion.

[0014] The first plate may further include at least one first alignment groove provided on the outer surface side in the thickness direction of the first plate, and the second plate may further include at least one second alignment groove provided on the outer surface side of the base part in the thickness direction of the base part.

[0015] The first alignment groove can be formed so that when the input gear fixed to the second plate is coupled with the spur gear in the correct position, it is positioned on the same line as the second alignment groove.

[0016] The above input gear fixing part further includes a key that is inserted into a key groove provided on the drive shaft fastening hole side and positioned in alignment with the second alignment groove with respect to the center of the second plate, and the key can be positioned in a straight line with the tooth profile of the input gear in the axial direction of the input gear.

[0017] The second alignment groove may be formed to extend from the outer surface of the base portion to one side of the base where the input gear fixing portion is not formed. Effects of the invention

[0018] The input gear alignment jig according to the present embodiment can prevent tooth profile breakage during assembly between the input gear of a motor and the spur gear of a reduction gear and align them to an accurate coupling position, thereby significantly improving the efficiency of the motor and reduction gear coupling operation. Brief explanation of the drawing

[0019] FIG. 1 is a perspective view illustrating the state before the motor and the reduction gear are combined. Figure 2 is a cross-sectional view illustrating the combined state of the motor and the reduction gear. FIG. 3 is a perspective view showing a disassembled state of an input gear alignment jig according to one embodiment of the present invention. FIG. 4 is a perspective view showing a disassembled state of an input gear alignment jig according to one embodiment of the present invention. FIG. 5 is a perspective view illustrating the state before the input gear of a motor is coupled with the spur gear of a reduction gear using an input gear alignment jig according to one embodiment of the present invention. FIG. 6 is a perspective view illustrating the state in which the input gear of a motor is coupled with the spur gear of a reduction gear using an input gear alignment jig according to one embodiment of the present invention. FIG. 7 is a cross-sectional view illustrating the state in which the input gear of a motor is engaged with the spur gear of a reduction gear using an input gear alignment jig according to one embodiment of the present invention. Specific details for implementing the invention

[0020] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments are presented to sufficiently convey the concept of the present invention to those skilled in the art to which the present invention pertains. The present invention is not limited to the embodiments presented herein and may be embodied in other forms. In order to clarify the present invention, the drawings may omit the illustration of parts unrelated to the description and may slightly exaggerate the size of components to aid understanding.

[0021] FIGS. 1 and FIGS. 2 are perspective views illustrating the state before the motor and the reduction gear are combined and the state after they are combined, respectively. With reference to FIGS. 1 and FIGS. 2, the brief configuration of the motor (10) and the reduction gear (20) assembled by the input gear alignment jig according to one embodiment of the present invention is described as follows.

[0022] The motor (10) may include a drive shaft (11) that outputs rotational force and an input gear (12) that is coupled to the drive shaft (11) and rotates together with the drive shaft (11). More specifically, the drive shaft (11) may include a drive shaft key (11a) formed protruding from one side of the outer surface. Additionally, the input gear (12) may include a gear portion (12a) that transmits rotational force to a reduction gear (20), a drive shaft fastening hole (12b) provided for coupling with the drive shaft (11), and a key groove (12c) provided on the side of the drive shaft fastening hole (12b) so that the drive shaft key (11a) can be inserted. Here, the key groove (12c) may be formed in a straight line with the tooth profile of the input gear (12) in the axial direction of the input gear (12). Additionally, the motor (10) may further include a motor fastening bolt (13) for fixing to the reduction gear (20).

[0023] Meanwhile, the reduction gear (20) may include a spur gear (21) that receives rotational force from an input gear (12) configured as described above, and a motor connection part (22) for connection with a motor (10). Here, the motor connection part (22) may include an input gear insertion hole (22a) formed through the spur gear (21) side so that the input gear (12) can mesh with the spur gear (21), and a motor connection bolt hole (22b) provided so that a motor connection bolt (13) is fastened so that the motor (10) can be fixed to the reduction gear (20) while one side of the motor (10) is seated on the motor connection part (22).

[0024] Meanwhile, FIGS. 3 and FIGS. 4 are perspective views illustrating the disassembled state of an input gear alignment jig according to one embodiment of the present invention, FIG. 5 is a perspective view illustrating the state before the input gear of a motor is coupled with the spur gear of a reduction gear using the input gear alignment jig according to one embodiment of the present invention, and FIGS. 6 and FIGS. 7 are a perspective view and a cross-sectional view illustrating the state in which the input gear of a motor is coupled with the spur gear of a reduction gear using the input gear alignment jig according to one embodiment of the present invention.

[0025] Referring to FIGS. 3 to 7, an input gear alignment jig according to one embodiment of the present invention may include a first plate (100) formed to be fixed to the side of a reduction gear (20), and a second plate (200) provided to be fixed to an input gear (12) and coupled to the first plate (100).

[0026] The first plate (100) may include a first plate hole (110) provided in the center as an overall annular plate, four fixing arms (120) provided radially with respect to the center of the first plate hole (110) on the outer surface side, and a first alignment groove (130) formed in the thickness direction of the first plate (100) on the outer surface side.

[0027] The first plate hole (110) may be provided larger than the diameter of the input gear (12) so that the input gear (12) can be inserted. Additionally, the first plate hole (110) may be provided so that the outer diameter side of the input gear fixing part (220), which will be described later, can be inserted and fixed.

[0028] The fixed arm (120) may include a fixed arm hole (121) provided on the end side and at least two fixing pins (122) provided to be fastened to the fixed arm hole (121). Here, the fixed arm hole (121) is formed at a position corresponding to a motor fastening bolt hole (22b) provided on the side of the reduction gear (20), and the fixing pins (122) may be provided to be insertable into the motor fastening bolt hole (22b).

[0029] Accordingly, the fixed arm (120) can be fixed to the motor connection part (22) provided on the side of the reduction gear (20). That is, the first plate (100) can be fixed to the side of the motor connection part (22) by means of a fixing pin (122) in a state where the center axis of the first plate hole (110) coincides with the center axis of the input gear insertion hole (22a).

[0030] In addition, the fixed arm hole (121) is not only formed for the connection of the fixed pin (122), but can also be used as a hole through which a worker can visually check the tap condition of the motor fastening bolt hole (22b) when the first plate (100) is fixed to the side of the reduction gear (20).

[0031] For example, two of the fixing arm holes (121) provided in the four fixing arms (220) may have fixing pins (122) attached, and the remaining two may be used as holes where a worker can visually check the tap status of the motor fastening bolt holes (22b).

[0032] The first alignment grooves (130) may be formed in a total of four places between each fixing arm (120) on the outer surface of the first plate (100). These first alignment grooves (130) are for confirming the correct position of the second plate (200) coupled to the first plate (100) and may be formed as 'V'-shaped grooves or provided as protrusions, printing, etc.

[0033] Meanwhile, the second plate (200) may include a base portion (210) in the shape of a circular plate and an input gear fixing portion (220) formed protruding from one side of the base portion (210) to which the input gear (12) is fixed.

[0034] The base portion (210) may be formed with a diameter equal to the diameter of the first plate (100) and may include at least two grip grooves (211) provided on the outer surface side and a second alignment groove (212) formed on the outer surface side in the thickness direction of the base portion (210). Here, the grip grooves (211) may be provided in various shapes to facilitate the operator's rotation of the second plate (200) relative to the first plate (100) while the second plate (200) is coupled to the first plate (100). Additionally, the second alignment groove (212) may be formed extending from the outer surface side of the base portion (210) to one side of the base portion (210) where the input gear fixing portion (220) is not formed. Additionally, the second alignment groove (212) is formed as a 'V' groove or may be provided as a protrusion, printing, etc., so that the first plate (100) and the second plate (200) are joined in the correct position and can be positioned on the same straight line as the first alignment groove (130), and can be easily checked visually by a worker.

[0035] The input gear fixing part (220) may include a first protrusion (221) formed protruding from one side of the base part (210) to support one side of the input gear (12), and a second protrusion (222) formed protruding from the first protrusion (221) and inserted into the side of the drive shaft fastening hole (12b) provided in the input gear (12). Here, the diameter of the first protrusion (221) may be provided to be the same as or similar to the maximum outer diameter of the input gear (12). Additionally, the first protrusion (221) may be provided so that its outer diameter can be inserted and fixed into the inner circumferential side of the first plate hole (110) when the second plate (200) is coupled to the first plate (100). Additionally, the second protrusion (222) may be provided with a diameter equal to or similar to that of the drive shaft fastening hole (12b) so that it can be inserted into the drive shaft fastening hole (12b) as described above.

[0036] Additionally, the input gear fixing part (220) may further include a key (223) formed to protrude from the outer surface side of the second protrusion (222) and configured to be inserted into a key groove (12c) provided on the side of the drive shaft fastening hole (12b). Here, as the key groove (12c) is formed in a straight line with the tooth profile of the input gear (12) in the axial direction of the input gear (12) as described above, the key (223) may be formed in a straight line with the tooth profile of the input gear (12) in the axial direction of the input gear (12) in the same manner as the key groove (12c).

[0037] Accordingly, the input gear (12) coupled to the input gear fixing part (220) can be arranged to rotate together with the input gear fixing part (220). Additionally, the formation position of the key (223) can be provided at a position corresponding to the second alignment groove (212).

[0038] Additionally, the second plate (200) configured as described above may further include a second plate hole (230) formed through the base portion (210) to the second protrusion (222) via the first protrusion (221). Here, the center axis of the second plate hole (230) may be formed to be the same as the center axis of the first plate hole (110). Furthermore, through the second plate hole (230), the operator can visually check whether the input gear (12) is fastened on the input gear fixing portion (220) from one side of the base portion (210) where the input gear fixing portion (220) is not formed.

[0039] Meanwhile, referring to FIGS. 5 to 7, the method of assembling the input gear (12) of the motor (10) and the spur gear (21) of the reduction gear (20) using an input gear alignment jig including a first plate (100) and a second plate (200) as described above is as follows.

[0040] First, the first plate (100) is fixed to the side of the motor fastening part (22) provided in the reduction gear (20). At this time, the fixing arm holes (121) are positioned at locations corresponding to the motor fastening bolt fastening holes (22b), and at least two fixing pins (122) are inserted into the motor fastening bolt fastening holes (22b), so that the center axis of the first plate hole (110) and the center axis of the input gear insertion hole (22a) are aligned on the same line.

[0041] Additionally, the input gear (12) separated from the motor (10) is fixed to the second plate (200). At this time, the second protrusion (222) is inserted into the drive shaft fastening hole (12b), the key (223) is inserted into the key groove (12c), and one side of the input gear (12) is supported by the first protrusion (222). Furthermore, the center axis of the second plate hole (230) is aligned with the center axis of the drive shaft fastening hole (12b).

[0042] Afterward, while the operator holds the grip portion (211) of the second plate (200) to which the input gear (12) is fixed, the gear portion (12a) of the input gear (12) is inserted toward the first plate hole (110), and the second plate (220) is coupled to the first plate (100) so that the outer surface of the second protrusion (212) is inserted into the first plate hole (110). At this time, the first alignment groove (130) and the second alignment groove (212) are arranged in a straight line as shown in FIG. 6. Accordingly, the teeth of the input gear (12) and the spur gear (21) mesh with each other in the correct position, and the assembly between the input gear (12) and the reduction gear (20) can be completed.

[0043] Afterward, the operator separates the second plate (200) from the input gear (12) and separates the first plate (100) from the motor connection part (22) of the reduction gear (20), and then, while holding the motor (10), connects the drive shaft (11) of the motor (10) to the input gear (12) which has been assembled with the spur gear (21) so that the drive shaft (11) of the motor (10) can be inserted into the drive shaft connection hole (12b). At this time, the drive shaft key (11a) is formed in a straight line with the tooth profile of the input gear (12) in the axial direction of the input gear (12) and is inserted into the key groove (12c), thereby enabling alignment between the drive shaft (11) and the input gear (12).

[0044] Afterwards, the assembly between the motor (10) and the reduction gear (20) can be completed by fastening the motor fastening bolt (13) into the motor fastening bolt fastening hole (22b).

[0045] Accordingly, the input gear alignment jig according to one embodiment of the present invention can prevent tooth breakage during assembly between the input gear (12) of the motor (10) and the spur gear (21) of the reduction gear (20) and align them to an accurate coupling position, thereby greatly improving the efficiency of the coupling operation between the motor (10) and the reduction gear (20).

[0046] Although specific embodiments of the input gear alignment jig according to the present invention have been described so far, it is obvious that various modifications are possible within the scope of the present invention.

[0047] Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims set forth below as well as equivalents thereof.

[0048] That is, the aforementioned embodiments should be understood as exemplary in all respects and not limiting, and the scope of the invention is defined by the claims set forth below rather than by the detailed description, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts thereof should be interpreted as being included within the scope of the invention. Explanation of the symbols

[0049] 10. Motor 11. Drive shaft 11a. Drive shaft key 12. Input Gear 12a. Gear section 12b. Drive shaft fastening hole 12c. Keyway 13. Motor fastening bolt 20. Reducer 21. Spur Gear 22. Motor connection part 22a. Input gear insertion hole 22b. Motor fastening bolt fastening hole 100. First plate 110. First plate hole 120. Fixed arm 121. Fixed arm hole 122. Fixing pin 130. First alignment groove 200. Second plate 210. Bass section 211. Grip groove 212. Second alignment groove 220. Input gear fixing part 221. First protrusion 222. Second protrusion 223. Key 230. Second plate hole

Claims

Claim 1 An input gear alignment jig for assembling an input gear of a motor and a spur gear of a reduction gear, comprising: an annular first plate formed to be fixed to the motor fastening side of the reduction gear, including a first plate hole provided in the center; and a second plate formed to protrude from one surface of a base portion so as to be inserted into the first plate hole, including an input gear fixing portion to which the input gear is fixed, wherein the input gear fixing portion is inserted into the first plate hole and one surface of the base portion is supported on one surface of the first plate. Claim 2 An input gear alignment jig according to claim 1, wherein the first plate is formed to protrude radially with respect to the center of the first plate hole and includes at least two fixing arms for fixing the first plate to the motor fastening part. Claim 3 A jig for aligning an input gear according to paragraph 2, wherein the fixed arm comprises a fixed arm hole provided on the end side and a fixed pin that is coupled through the fixed arm hole and inserted into a motor fastening bolt fastening hole provided on the motor fastening side. Claim 4 A jig for aligning an input gear, wherein the input gear fixing portion comprises a first protrusion formed protruding from one surface of the base portion and inserted and fixed into the first plate hole, and a second protrusion formed protruding from one surface of the first protrusion and inserted and fixed into the drive shaft fastening hole provided in the input gear. Claim 5 In paragraph 4, the input gear fixing part further includes a key that is formed protrudingly on the outer surface side of the second protrusion and inserted into a key groove provided on the drive shaft fastening hole side, and the key is an input gear alignment jig arranged in a straight line with the tooth profile of the input gear in the axial direction of the input gear. Claim 6 In claim 4, the second plate further comprises a second plate hole formed penetrating from the base portion through the first protrusion to the second protrusion. Claim 7 A jig for aligning an input gear according to claim 1, wherein the first plate further includes at least one first alignment groove provided in the thickness direction of the first plate on the outer surface side, and the second plate further includes at least one second alignment groove provided in the thickness direction of the base part on the outer surface side of the base part. Claim 8 In claim 7, the first alignment groove is formed such that the input gear fixed to the second plate is positioned on the same line as the second alignment groove when coupled with the spur gear in the correct position. Claim 9 In claim 8, the input gear fixing part further includes a key inserted into a key groove provided on the drive shaft fastening hole side, which is positioned in alignment with the second alignment groove with respect to the center of the second plate, and the key is an input gear alignment jig positioned in alignment with the tooth profile of the input gear in the axial direction of the input gear. Claim 10 In claim 7, the second alignment groove is formed to extend from the outer surface of the base portion to one side of the base where the input gear fixing portion is not formed, in a jig for aligning an input gear.

Images