Positioning tool

Abstract

The utility model belongs to the technical field of assembly positioning and discloses a positioning tool which comprises a base, a first positioning block and a first positioning pin. The first positioning block is arranged on the base, a positioning groove is formed in the first positioning block, and the positioning groove is clamped with the first gear; the first gear is provided with a first penetrating hole and a positioning hole, the first penetrating hole is used for penetrating the rotating shaft, and the positioning hole extends in the circumferential direction of the first gear; the first end of the positioning hole is provided with a first inner wall face, the second end of the positioning hole is provided with a second inner wall face, and the first end of the positioning hole and the second end of the positioning hole are the two ends of the positioning hole in the extending direction of the positioning hole. The first positioning pins penetrate through the first positioning blocks and the positioning holes, at least one first positioning pin abuts against the first inner wall face, and at least one first positioning pin abuts against the second inner wall face. The first gear is positioned through the first positioning block and the first positioning pin, the positioning precision can be improved, the gear is prevented from moving along the rotating shaft or deflecting relative to the rotating shaft in the welding process, and the welding quality of the gear transmission shaft is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to assembly positioning technical field, especially positioning tool. BACKGROUND

[0002] The frame and the body of the frame type circuit breaker are driven through a gear transmission shaft, the gear transmission shaft comprises a rotating shaft and a plurality of gears arranged on the rotating shaft and welded together, the rotating shaft is arranged on the frame, and when rotating, the gears drive the relevant components to move, thereby realizing the switching of the three positions (separation position, test position and connection position) of the frame type circuit breaker. During the rotating process of the gear transmission shaft, the gear transmission shaft bears both bending moment and torque, and the position precision between the gears and the rotating shaft and the straightness of the rotating shaft directly affect the transmission efficiency, normal breaking function, wear and failure risk of the product. The positioning and fixing of the gears and the rotating shaft during welding determine the quality of the final gear transmission shaft product.

[0003] In the prior art, the following scheme is adopted for the positioning of the rotating shaft and the gears during welding: a limiting shaft shoulder is arranged on the rotating shaft, two gears are sleeved on the rotating shaft and abut against the two sides of the limiting shaft shoulder, and the limiting shaft shoulder and the gears are inserted and matched through a positioning column and a positioning hole, and the two gears are fastened through a bolt and a nut, thereby realizing the positioning of the gears relative to the rotating shaft, and welding is performed after the positioning.

[0004] The prior art has the following defects: the arrangement of the limiting shaft shoulder and the positioning column on the rotating shaft undoubtedly increases the processing difficulty and the use of materials of the rotating shaft; moreover, the positioning of the position of the gears relative to the rotating shaft through the bolt requires the application of a certain pre-tightening force to the gears, and the pre-tightening force is likely to cause the gears to deform; in addition, since the gears are prevented from rotating relative to the rotating shaft by means of the positioning column, the stress at the welding point position is likely to cause the gears to be angularly offset during the welding between the gears and the rotating shaft, thereby causing the existence of an acting force between the gears and the rotating shaft, and further causing the relative position of the gears and the rotating shaft to be offset, and the welding quality of the gear transmission shaft is poor, thereby affecting the product quality after the gear transmission shaft is installed in the circuit breaker.

[0005] Therefore, there is an urgent need for a positioning tool to solve the above problems in the prior art. UTILITY MODEL CONTENTS

[0006] The utility model discloses a positioning tool, can improve the positioning precision of the gear on the rotating shaft, prevent the gear from moving along the rotating shaft or rotating relative to the rotating shaft during the welding process, and improve the welding quality of the gear transmission shaft.

[0007] To achieve the above purpose, the utility model adopts the following technical scheme:

[0008] The utility model provides a positioning tool for positioning gear transmission axle, gear transmission axle includes pivot and first gear of setting on pivot, the positioning tool includes base, first locating block and a plurality of first locating pin,

[0009] First locating block is located in base, first locating block is provided with locating groove, and locating groove is engaged with first gear,

[0010] First gear is provided with first through hole and locating hole, first through hole is used for passing through pivot, locating hole is arranged at interval with first through hole, and locating hole extends along the circumference of first gear, the first end of locating hole is provided with first inner wall surface, the second end of locating hole is provided with second inner wall surface, and the first end of locating hole and the second end of locating hole are two ends of locating hole along the extension direction of itself,

[0011] A plurality of first locating pins are passed through the first locating block and the locating hole, at least one first locating pin abuts against the first inner wall surface, and at least one first locating pin abuts against the second inner wall surface.

[0012] As an optional scheme of the positioning tool provided by the utility model, the first gear includes first side and second side arranged at an angle, third side and fourth side, the third side and the fourth side are respectively two sides of the first gear along the axial direction, and the first side and the second side are connected between the third side and the fourth side.

[0013] The first locating block includes a first locating plate and a second locating plate, and the second locating plate is detachably connected to the first locating plate.

[0014] The first locating plate is provided with a first limiting groove, the first limiting groove has a first locating surface, a second locating surface and a third locating surface, the first locating surface, the second locating surface, the third locating surface and the second locating plate surround to form the locating groove, the first locating surface is attached to the first side, the second locating surface is attached to the second side, the third locating surface is attached to the third side, and the second locating plate is attached to the fourth side.

[0015] The first locating pin is passed through the first locating plate and the locating hole, or the first locating pin is passed through the second locating plate and the locating hole.

[0016] As an optional scheme of the positioning tool provided by the utility model, the first side is provided with a first protrusion, and the second side is provided with a second protrusion.

[0017] The first positioning surface is concavely provided with a first positioning groove, and the second positioning surface is concavely provided with a second positioning groove.

[0018] The first positioning groove is engaged with the first protrusion, and the second positioning groove is engaged with the second protrusion.

[0019] As an optional scheme of the positioning tool provided by the utility model, a plurality of first gears are arranged on the rotating shaft;

[0020] The first positioning blocks are arranged in plurality along the axial direction of the rotating shaft, and the first positioning blocks and the first gears are in one-to-one correspondence; the first positioning block at one end is provided with a through avoiding through hole for penetrating the rotating shaft, the avoiding through hole is communicated with the positioning groove, and the first positioning block at the other end is provided with a stop limiting surface which abuts against the end surface of the rotating shaft.

[0021] As an optional scheme of the positioning tool provided by the utility model, a plurality of first meshing teeth are arranged on the first gear in the circumferential direction;

[0022] The positioning tool further comprises a first limiting insertion plate, a plurality of first insertion grooves are arranged on the first limiting insertion plate, and the first insertion grooves and the first meshing teeth of the first gears are engaged in one-to-one correspondence.

[0023] As an optional scheme of the positioning tool provided by the utility model, the gear transmission shaft further comprises a second gear sleeved on the rotating shaft; fifth and sixth side surfaces are arranged on the two sides of the second gear in the axial direction respectively;

[0024] The positioning tool further comprises a second positioning block and a third positioning block which are detachably connected;

[0025] The second positioning block is provided with a second limiting groove, a fourth positioning surface and a fifth positioning surface; the second limiting groove is engaged with the first end of the second gear; the fourth positioning surface is attached to the fifth side surface; and the fifth positioning surface is attached to the sixth side surface;

[0026] The third positioning block is provided with a third limiting groove, and the third limiting groove is engaged with the second end of the second gear.

[0027] As an optional scheme of the positioning tool provided by the utility model, the second positioning block comprises a seat body and a profiled clamping plate;

[0028] The seat body is concavely provided with a first clamping groove, and the groove wall of the first clamping groove comprises the fourth positioning surface and the fifth positioning surface;

[0029] The profiling card plate is inserted into the first clamping groove, and the second limiting groove is arranged on the profiling card plate.

[0030] As an optional scheme of the positioning tool provided by the utility model,

[0031] The second gear includes a seventh side and an eighth side arranged at an angle, and a plurality of second meshing teeth, the seventh side and the eighth side are connected between the fifth side and the sixth side, and the plurality of second meshing teeth are distributed along the circumference of the second gear.

[0032] The second limiting groove is used for clamping the plurality of second meshing teeth.

[0033] The groove wall of the third limiting groove includes a sixth positioning surface and a seventh positioning surface arranged at an angle, the sixth positioning surface is attached to the seventh side, and the seventh positioning surface is attached to the eighth side.

[0034] As an optional scheme of the positioning tool provided by the utility model, the positioning tool further includes a fixing pin;

[0035] The second positioning block is provided with a first boss, a second boss and a second clamping groove, the first boss and the second boss are arranged at intervals, and the second clamping groove is located between the first boss and the second boss.

[0036] The third limiting groove and the second clamping groove enclose a shaft passage allowing the shaft to pass through, and the third positioning block is provided with a third boss;

[0037] The fixing pin is connected to the first boss, the second boss and the third boss.

[0038] As an optional scheme of the positioning tool provided by the utility model, the positioning tool further includes a fourth positioning block and a second positioning pin;

[0039] The fourth positioning block is arranged on the base and is spaced apart from the first positioning block, and the fourth positioning block is recessed with a fourth limiting groove.

[0040] The second positioning pin is arranged in the fourth positioning block and can block the slot of the fourth limiting groove 91, the shaft is clamped in the fourth limiting groove and abuts against the second positioning pin.

[0041] As optional scheme of the positioning tool provided by the utility model, fourth boss and fifth boss are protruded on the fourth positioning block, the fourth limiting groove is located between the fourth boss and the fifth boss, and the second positioning pin is arranged through the fourth boss and the fifth boss;

[0042] And / or, the fourth limiting groove is a V-shaped groove, a U-shaped groove or an arc-shaped groove.

[0043] And / or, the positioning tool further comprises a pressing member, the second positioning pin is provided with a pressing hole, and the pressing member can be screwed in the pressing hole and abut against the rotating shaft.

[0044] The utility model discloses beneficial effects:

[0045] The positioning tool provided by the utility model, when the first gear is sleeved on the rotating shaft, the first gear is placed in the positioning groove of the first positioning block, and the first positioning pin is arranged through the first positioning block and the positioning hole of the first gear in the positioning groove to position the position of the first gear on the base, and the stability of the first gear in the welding process is guaranteed. The inner wall of the positioning groove can limit the relative movement of the first gear on the positioning tool. Since the first inner wall surface and the second inner wall surface of the positioning hole of the first gear abut against at least one first positioning pin respectively, the first positioning pin can limit the clockwise rotation and counterclockwise rotation of the first gear relative to the rotating shaft, and the relative position between the first gear and the rotating shaft is ensured not to change. Since the first gear is positioned by the first positioning block and the first positioning pin, pressure does not need to be applied to the first gear, and no structure for positioning the first gear needs to be processed on the rotating shaft, the processing difficulty is reduced, the possibility of gear deformation is reduced, the positioning accuracy of the first gear on the rotating shaft is improved, the gear transmission shaft is prevented from moving along the rotating shaft or deflecting relative to the rotating shaft during the welding process, the welding quality of the gear transmission shaft is improved, and the quality of the circuit breaker product can be ensured after the gear transmission shaft is installed in the circuit breaker. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings needed to be used in the embodiments of the utility model will be briefly introduced as follows. Obviously, the drawings described below are only some embodiments of the utility model, and other drawings can be obtained according to the drawings without creative labor for those skilled in the art.

[0047] Figure 1 It is the structural schematic diagram of the gear transmission shaft provided by the specific embodiment of the utility model.

[0048] Figure 2 It is the first axonometric view of the positioning tool provided by the specific embodiment of the utility model.

[0049] Figure 3is the second axial drawing of the positioning tool provided by the embodiment of the utility model;

[0050] Figure 4 is the structural schematic view of the base provided by the embodiment of the utility model;

[0051] Figure 5 is the exploded schematic view of the first positioning assembly provided by the embodiment of the utility model;

[0052] Figure 6 is the positioning schematic view of the first gear on the first positioning plate provided by the embodiment of the utility model;

[0053] Figure 7 is the structural schematic view of the second positioning assembly provided by the embodiment of the utility model;

[0054] Figure 8 is the exploded schematic view of the second positioning assembly provided by the embodiment of the utility model;

[0055] Figure 9 is the structural schematic view of the third positioning block provided by the embodiment of the utility model;

[0056] Figure 10 is the sectional view of the second positioning assembly provided by the embodiment of the utility model;

[0057] Figure 11 is the first positioning schematic view between the second gear and the third positioning block and the profiling clamp plate provided by the embodiment of the utility model;

[0058] Figure 12 is the second positioning schematic view between the second gear and the third positioning block and the profiling clamp plate provided by the embodiment of the utility model;

[0059] Figure 13 is the first view of the positioning shaft of the third positioning assembly provided by the embodiment of the utility model;

[0060] Figure 14 is the second view of the positioning shaft of the third positioning assembly provided by the embodiment of the utility model.

[0061] In the drawing:

[0062] 100, gear transmission shaft; 101, rotating shaft; 102, first gear; 103, second gear;

[0063] 1021, first side surface; 1022, second side surface; 1023, first protrusion; 1024, second protrusion; 1025, positioning hole; 1026, first engagement tooth; 1027, first circular arc surface; 1028, first through hole; 1029, third side surface; 10210, fourth side surface;

[0064] 10251, first inner wall surface; 10252, second inner wall surface;

[0065] 1031, seventh side surface; 1032, eighth side surface; 1033, second engagement tooth; 1034, second circular arc surface; 1035, second through hole; 1036, fifth side surface; 1037, sixth side surface;

[0066] 1, base; 2, first positioning block; 3, first positioning pin; 4, first limiting insert plate; 5, second positioning block; 6, third positioning block; 7, fixing pin; 8, second limiting insert plate; 9, fourth positioning block; 10, second positioning pin;

[0067] 11, mounting groove; 12, mounting hole;

[0068] 21, positioning groove; 22, first positioning plate; 23, second positioning plate; 24, avoiding through hole; 25, stop limiting surface;

[0069] 221, first limiting groove; 222, first through hole; 223, lapping groove;

[0070] 2211, first positioning surface; 2212, second positioning surface; 2213, first positioning recess; 2214, second positioning recess; 2215, third positioning surface;

[0071] 231, second through hole; 232, avoiding chamfer;

[0072] 41, first insertion slot;

[0073] 51, seat body; 52, profiling clamping plate;

[0074] 511, first clamping slot; 512, first boss; 513, second boss; 514, second clamping slot; 515, bearing;

[0075] 5111, fourth positioning surface; 5112, fifth positioning surface;

[0076] 521, second limiting groove; 522, stop block;

[0077] 61, third limiting groove; 62, shaft passage; 63, third boss; 64, operation port;

[0078] 611, sixth positioning surface; 612, seventh positioning surface;

[0079] 81, second slot;

[0080] 91, fourth limit groove; 92, fourth boss; 93, fifth boss;

[0081] 110, pressing hole; 120, handle hole. DETAILED DESCRIPTION

[0082] The utility model will be described in further detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0083] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0084] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0085] In the description of the embodiment, the terms "up", "down", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0086] The term "and / or" in the embodiments of the present application is only used to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects.

[0087] In the embodiments of the present application, the same reference signs represent the same components, and for the sake of brevity, the detailed description of the same components is omitted in different embodiments.

[0088] As shown in Figure 1 , it is a schematic diagram of the gear transmission shaft 100 provided by the present embodiment, which can be applied in a frame type circuit breaker. Among them, the gear transmission shaft 100 includes a rotating shaft 101 and a first gear 102 and a second gear 103 sleeved on the rotating shaft 101. When the first gear 102 and the second gear 103 are processed, the first through hole 1028 (see Figure 6 ) for passing through the rotating shaft 101 is processed on the first gear 102, and the second through hole 1035 (see Figure 11 ) for passing through the rotating shaft 101 is processed on the second gear 103. After positioning the first gear 102 and the second gear 103 on the rotating shaft 101, the first gear 102 and the second gear 103 are welded on the rotating shaft 101 by welding equipment. When the rotating shaft 101 rotates, the first gear 102 and the second gear 103 rotate synchronously under the driving of the rotating shaft 101, realizing transmission.

[0089] As shown in Figure 2 and Figure 3 , it is a positioning tool provided by the present embodiment, which is used for positioning the first gear 102, the second gear 103 and the rotating shaft 101, ensuring that the first gear 102 and the second gear 103 are accurately positioned on the rotating shaft 101, and are not affected by welding stress during welding. Among them, the positioning tool includes a base 1 and a first positioning assembly, a second positioning assembly and a third positioning assembly arranged on the base 1. The first positioning assembly is used for positioning the first gear 102, the second positioning assembly is used for positioning the second gear 103, and the third positioning assembly is used for positioning the rotating shaft 101. As shown in Figure 4 , it is a structural schematic diagram of the base 1, the base 1 is provided with a mounting groove 11 corresponding to the first positioning assembly, the second positioning assembly and the third positioning assembly, and the bottom wall of the mounting groove 11 is provided with a mounting hole 12, the first positioning assembly, the second positioning assembly and the third positioning assembly are clamped in the corresponding mounting groove 11, and a bolt or a screw is used to pass through the mounting hole 12 from bottom to top and connect with the corresponding positioning assembly, so that the three positioning assemblies can be conveniently disassembled and replaced, thereby being suitable for positioning different models of gear transmission shafts 100.

[0090] The following will be described with reference to Figures 2 to 14 The specific structure of the first positioning assembly, the second positioning assembly and the third positioning assembly provided by the embodiment will be described in turn.

[0091] Referring to Figure 2 and Figure 5 , the first positioning assembly comprises a first positioning block 2 and a first positioning pin 3. The first positioning block 2 is arranged on the base 1, and the first positioning block 2 is provided with a positioning groove 21 which is engaged with the first gear 102. In combination with Figure 1 and Figure 6 , the first gear 102 is provided with a first through hole 1028 for passing through the rotating shaft 101 and a positioning hole 1025 which is arranged in a spaced manner with the first through hole 1028 and extends along the circumference of the first gear 102, i.e. the positioning hole 1025 is an arc-shaped strip hole. The first end of the positioning hole 1025 is provided with a first inner wall surface 10251, and the second end of the positioning hole 1025 is provided with a second inner wall surface 10252. The first end of the positioning hole 1025 and the second end of the positioning hole 1025 are two ends of the positioning hole 1025 along the extension direction thereof. A plurality of first positioning pins 3 are passed through the first positioning block 2 and the positioning hole 1025 of the first gear 102. At least one first positioning pin 3 abuts against the first inner wall surface 10251, and at least one first positioning pin 3 abuts against the second inner wall surface 10252, so as to limit the rotation of the first gear 102 in two different directions respectively.

[0092] When the positioning sleeve is arranged on the rotating shaft 101, the first gear 102 is placed in the positioning groove 21 of the first positioning block 2, and the first positioning pins 3 are passed through the first positioning block 2 and the positioning hole 1025 of the first gear 102 in the positioning groove 21 to position the first gear 102 on the base 1, so as to ensure the stability of the first gear 102 during the welding process. The inner wall of the positioning groove 21 can limit the relative movement of the first gear 102 on the positioning tool. Since the first inner wall surface 10251 and the second inner wall surface 10252 of the positioning hole 1025 of the first gear 102 abut against at least one first positioning pin 3 respectively, the first positioning pin 3 can limit the clockwise rotation and the counterclockwise rotation of the first gear 102 relative to the rotating shaft 101.

[0093] Since the first gear 102 is positioned by the first positioning block 2 and the first positioning pin 3, no pressure needs to be applied to the first gear 102, no structure needs to be machined on the rotating shaft 101 for positioning the first gear 102, the machining difficulty is reduced, the possibility of deformation of the first gear 102 is reduced, the positioning accuracy of the first gear 102 on the rotating shaft 101 is improved, the first gear 102 is prevented from moving along the rotating shaft 101 or deflecting relative to the rotating shaft 101 during welding, the welding quality of the gear transmission shaft 100 is improved, and the quality of the circuit breaker product can be ensured after the gear transmission shaft 100 is installed in the circuit breaker.

[0094] Referring to Figure 1 and Figure 6 , the first gear 102 includes a first side surface 1021 and a second side surface 1022 arranged at an angle, a third side surface 1029 and a fourth side surface 10210, the third side surface 1029 and the fourth side surface 10210 being two side surfaces of the first gear 102 along the axial direction, i.e., the third side surface 1029 and the fourth side surface 10210 being two side surfaces of the first gear 102 along the thickness direction, and the first side surface 1021 and the second side surface 1022 being connected between the third side surface 1029 and the fourth side surface 10210.

[0095] Optionally, as shown in Figure 5 , the first positioning block 2 includes a first positioning plate 22 and a second positioning plate 23. The second positioning plate 23 is detachably connected to the first positioning plate 22. The first positioning plate 22 is provided with a first limiting groove 221, and the groove wall of the first limiting groove 221 and the second positioning plate 23 surround to form the positioning groove 21. Specifically, the first positioning plate 22 is provided with a first limiting groove 221, the first limiting groove 221 has a first positioning surface 2211, a second positioning surface 2212, and a third positioning surface 2215, and the first positioning surface 2211, the second positioning surface 2212, the third positioning surface 2215, and the second positioning plate 23 surround to form the positioning groove 21; the first positioning surface 2211 is attached to the first side surface 1021, and the second positioning surface 2212 is attached to the second side surface 1022; the third positioning surface 2215 is attached to the third side surface 1029, and the second positioning plate 23 is attached to the fourth side surface 10210.

[0096] The first positioning pin 3 is arranged through the first positioning plate 22 and extends into the positioning groove 21 to pass through the positioning hole 1025 of the first gear 102, or the first positioning pin 3 is arranged through the second positioning plate 23 and extends into the positioning groove 21 to pass through the positioning hole 1025 of the first gear 102.

[0097] The first limiting groove 221 is machined on the first positioning plate 22, and then the second positioning plate 23 is connected with the first positioning plate 22, so that the positioning groove 21 is formed, which can reduce the machining difficulty and improve the machining efficiency. The first positioning plate 22 and the second positioning plate 23 are arranged along the axial direction of the rotating shaft 101, so that the groove wall of the first limiting groove 221 and the second positioning plate 23 can limit two tooth surfaces of the first gear 102 in the thickness direction (that is, the axial direction of the first gear 102, which is also the axial direction of the rotating shaft 101).

[0098] Further, the first limiting groove 221 is a profiling groove matched with the shape and size of the first gear 102. For different first gears 102, the shape of the first limiting groove 221 is different, so that different first positioning plates 22 can be replaced, and after being connected with the second positioning plate 23, different positioning grooves 21 are formed.

[0099] Exemplarily, a fastener such as a bolt or a screw can be used to pass through the second positioning plate 23 and be connected to the first positioning plate 22, so as to realize the detachable connection between the first positioning plate 22 and the second positioning plate 23.

[0100] Of course, in other embodiments, the first positioning plate 2 can also be an integrated structure, and the positioning groove 21 can be directly machined on the first positioning plate 2.

[0101] As shown in Figure 6 , the first gear 102 further includes a first circular arc surface 1027 connected between the first side surface 1021 and the second side surface 1022, that is, the first gear 102 is a sector gear. The first side surface 1021 is provided with a first protrusion 1023, and the second side surface 1022 is provided with a second protrusion 1024. Figure 5 , the inner wall of the first limiting groove 221 further includes a first arc wall surface connected between the first positioning surface 2211 and the second positioning surface 2212. The first positioning surface 2211 is recessed with a first positioning recess 2213, and the second positioning surface 2212 is recessed with a second positioning recess 2214. The first arc wall surface is matched with the first circular arc surface 1027, the first positioning surface 2211 is matched with the first side surface 1021, the second positioning surface 2212 is matched with the second side surface 1022, the first positioning recess 2213 is matched with the first protrusion 1023, and the second positioning recess 2214 is matched with the second protrusion 1024, so that the first limiting groove 221 can be matched with the shape of the first gear 102, the positioning accuracy of the first gear 102 is improved, and the first gear 102 is placed in the positioning groove 21. Due to the existence of the first arc wall surface, the first positioning surface 2211, the second positioning surface 2212, the first positioning recess 2213 and the second positioning recess 2214, the first gear 102 can be prevented from rotating around the axial direction to a certain extent.

[0102] Exemplarily, referring to Figure 6The first positioning pin 3 is provided with two, one of which abuts against the hole wall of the left end (first end) of the positioning hole 1025 to limit the clockwise rotation of the first gear 102, and the other abuts against the hole wall of the right end (second end) of the positioning hole 1025 to limit the counterclockwise rotation of the first gear 102. When the first gear 102 has a rotation tendency in two different directions, the rotation of the first gear 102 is limited by the different first positioning pins 3 respectively, so as to avoid the first positioning pin 3 being cut off due to excessive shear force.

[0103] Of course, in other embodiments, only one first positioning pin 3 can be provided, and at this time the positioning hole 1025 can be a round hole matched with the first positioning pin 3, or more than two first positioning pins 3 can be provided and distributed at the hole walls of the two ends of the positioning hole 1025.

[0104] In combination Figure 1 , the shaft 101 is provided with two first gears 102, and the spacing between the two first gears 102 needs to meet the design spacing so that the gear transmission shaft 100 can be normally used after being installed in the circuit breaker. Referring to Figure 2 and Figure 3 , the first positioning block 2 is arranged in two along the axial direction of the shaft 101, and the two first positioning blocks 2 correspond to the two first gears 102 respectively to position the two first gears 102 respectively. The first positioning block 2 located at one end is provided with a through avoiding hole 24 for penetrating the shaft 101, and the avoiding hole 24 is in communication with the positioning groove 21, and the first positioning block 2 located at the other end is provided with a stop limiting surface 25 abutting against the end surface of the shaft 101.

[0105] When the two first gears 102 are placed one by one in the positioning grooves 21 of the two first positioning blocks 2 respectively, the shaft 101 is penetrated through the avoiding hole 24 on the first positioning block 2 at one end and the first penetrating hole 1028 on the first gear 102, and then moved to abut against the stop limiting surface 25 on the first positioning block 2 at the other end, which indicates that the shaft 101 is installed in place on the positioning tool.

[0106] Specifically, referring to Figure 5 , the avoiding hole 24 includes a first hole 222 penetratingly provided on the first positioning plate 22 and a second hole 231 penetratingly provided on the second positioning plate 23, and the first hole 222 and the second hole 231 are opposite to each other to facilitate the penetration of the shaft 101.

[0107] Referring to Figure 5 , the second positioning block 5 is provided with an avoiding chamfer 232 on each side of the second hole 231 to avoid the two first positioning pins 3.

[0108] Referring to Figure 3The first positioning plate 22 of the first positioning block 2 on the right side is concave and has a lap joint groove 223 for supporting the rotating shaft 101. The bottom wall of the lap joint groove 223 is the stop limiting surface 25.

[0109] It can be understood that when the rotating shaft 101 is provided with two or more first gears 102, the number of the first positioning blocks 2 is also adaptively increased, corresponding to the first gears 102.

[0110] As shown in Figure 6 , the first gear 102 is provided with a plurality of first meshing teeth 1026 along the circumferential direction. The plurality of first meshing teeth 1026 are located between the first side surface 1021 and the second side surface 1022. After the first gear 102 is placed in the positioning groove 21, the top first meshing tooth 1026 is higher than the first positioning block 2. In order to further ensure that the distance between the two first gears 102 meets the design distance, as shown in Figure 2 , the positioning tool further comprises a first limiting insert plate 4. The first limiting insert plate 4 is provided with two first insert grooves 41. The distance between the two first insert grooves 41 meets the design distance between the two first gears 102. The two first insert grooves 41 correspond to the first meshing teeth 1026 of the two first gears 102, and are clamped to ensure that the distance between the two first gears 102 remains unchanged during welding.

[0111] Of course, when the rotating shaft 101 is provided with a plurality of first gears 102, the first limiting insert plate 4 is provided with a plurality of first insert grooves 41 corresponding to the first gears 102.

[0112] In this embodiment, the first positioning plate 22 is clamped in the mounting groove 11 of the base 1 and is detachably connected with the base 1 through screws or bolts and the like. Further, a plurality of mounting grooves 11 are provided corresponding to the first positioning block 2, so that the mounting position of the first positioning block 2 on the base 1 is adjustable to adapt to two first gears 102 with different design distances. Further, when the position of the first positioning block 2 is adjusted, the first limiting insert plate 4 used also needs to be replaced accordingly, as shown in Figure 2 , two first limiting insert plates 4 with different lengths are shown, which can be selected according to needs.

[0113] As shown in Figures 7 to 12 , it is a structural schematic view of a second positioning assembly for positioning the second gear 103. In combination with Figure 1 , the second gear 103 is also a sector gear.

[0114] Referring to Figure 1 , the second gear 103 is provided with a fifth side surface 1036 and a sixth side surface 1037 on the two sides in the axial direction, i.e., the fifth side surface 1036 and the sixth side surface 1037 are respectively arranged on the two sides in the thickness direction of the second gear 103.

[0115] Referring to Figure 7 , Figure 8 , Figure 9 and Figure 10 , the second positioning assembly comprises a second positioning block 5 and a third positioning block 6 which are detachably connected. The second positioning block 5 is provided with a second limiting groove 521, a fourth positioning surface 5111 and a fifth positioning surface 5112. The third positioning block 6 is provided with a third limiting groove 61. The fourth positioning surface 5111 and the fifth positioning surface 5112 respectively abut the two end surfaces of the second gear 103 in the axial direction, i.e., the fourth positioning surface 5111 abuts the fifth side surface 1036 and the fifth positioning surface 5112 abuts the sixth side surface 1037, so as to limit the movement of the second gear 103 in the axial direction of the rotating shaft 101. The second limiting groove 521 is engaged with the first end of the second gear 103 and the third limiting groove 61 is engaged with the second end of the second gear 103; the second limiting groove 521 and the third limiting groove 61 enclose a space for limiting the second gear 103, which can limit the rotation of the second gear 103 relative to the rotating shaft 101. The second gear 103 is placed in the second limiting groove 521 of the second positioning block 5, and then the third positioning block 6 is connected to the second positioning block 5, and the third limiting groove 61 is engaged with the second gear 103, so as to complete the positioning of the second gear 103 and limit the axial movement of the second gear 103 along the rotating shaft 101 or the rotation of the second gear 103 relative to the rotating shaft 101.

[0116] Further, the second positioning block 5 comprises a seat body 51 and a profiled clamping plate 52. The seat body 51 is concavely provided with a first clamping groove 511, and the groove wall of the first clamping groove 511 comprises the fourth positioning surface 5111 and the fifth positioning surface 5112 described above; the profiled clamping plate 52 is inserted into the first clamping groove 511, and the profiled clamping plate 52 is provided with the second limiting groove 521 described above. By providing the second limiting groove 521 on the profiled clamping plate 52 and inserting it into the first clamping groove 511, the processing difficulty can be reduced, and the second limiting groove 521 can be easily formed on the second positioning block 5.

[0117] More specifically, the profiled clamping plate 52 is provided with a stop block 522 which abuts against the seat body 51 in the insertion direction, i.e., the direction in which the profiled clamping plate 52 is inserted into the first clamping groove 511. That is, the entire profiled clamping plate 52 has an L-shaped structure, and the stop block 522 can quickly position the profiled clamping plate 52 in the first clamping groove 511, so as to ensure that the second limiting groove 521 can accurately position the second gear 103.

[0118] Referring to Figure 11 and Figure 12The second gear 103 comprises a second circular arc surface 1034, a seventh side surface 1031 and an eighth side surface 1032 arranged at an angle, and a plurality of second meshing teeth 1033 arranged between the seventh side surface 1031 and the eighth side surface 1032. The second circular arc surface 1034 is connected to the first end of the seventh side surface 1031 and the first end of the eighth side surface 1032, and the second meshing teeth 1033 are located between the second end of the seventh side surface 1031 and the second end of the eighth side surface 1032. The seventh side surface 1031 and the eighth side surface 1032 are both connected between the fifth side surface 1036 and the sixth side surface 1037, and the plurality of second meshing teeth 1033 are distributed along the circumference of the second gear 103. The first end of the second gear 103 is the end where the second meshing teeth 1033 are located, and the second end of the second gear 103 is the first end of the seventh side surface 1031 and the first end of the eighth side surface 1032.

[0119] Referring to Figure 10 , Figure 11 and Figure 12 , the second limiting groove 521 is used to engage the plurality of second meshing teeth 1033; the groove wall of the third limiting groove 61 comprises a sixth positioning surface 611 and a seventh positioning surface 612 arranged at an angle, the sixth positioning surface 611 is in contact with the seventh side surface 1031, and the seventh positioning surface 612 is in contact with the eighth side surface 1032. That is, the second limiting groove 521 and the third limiting groove 61 are adaptively matched in shape and size with the second gear 103, and are positioned by engaging the second meshing teeth 1033, the seventh side surface 1031 and the eighth side surface 1032 arranged at an angle, which can improve the positioning accuracy and stability of the second gear 103 after positioning, and can prevent the second gear 103 from rotating relative to the rotating shaft 101 during welding.

[0120] Referring to Figure 7 , Figure 8 and Figure 10 , the second positioning assembly further comprises a fixing pin 7 for penetrating and fixing the second positioning block 5 and the third positioning block 6. The second positioning block 5 is provided with a first boss 512, a second boss 513 and a second clamping groove 514; the first boss 512 and the second boss 513 are arranged at intervals, and the second clamping groove 514 is located between the first boss 512 and the second boss 513. The third positioning block 6 is clamped in the second clamping groove 514, and the inner wall of the third limiting groove 61 and the bottom wall of the second clamping groove 514 surround a rotating shaft passage 62 through which the rotating shaft 101 passes. The third positioning block 6 is provided with a third boss 63. The fixing pin 7 penetrates and connects the first boss 512, the second boss 513 and the third boss 63.

[0121] By setting the second clamping groove 514 and clamping the third positioning block 6 in the second clamping groove 514, on the one hand, the position of the third positioning block 6 on the second positioning block 5 is facilitated, and on the other hand, the relative deviation between the third positioning block 6 and the second positioning block 5 due to welding stress and other factors can be ensured, thereby ensuring that the second limiting groove 521 and the third limiting groove 61 are always in a precise positioning position, thereby providing protection for the precise positioning of the second gear 103.

[0122] By fixing the first boss 512, the second boss 513 and the third boss 63 with the fixing pin 7, the second positioning block 5 and the third positioning block 6 are fixed in a simple and efficient manner.

[0123] Further, referring to Figure 1 , the rotating shaft 101 is provided with two second gears 103, the two second gears 103 are located between the two first gears 102, the second meshing teeth 1033 of the second gear 103 and the first meshing teeth 1026 of the first gear 102 face different directions. Correspondingly, the second positioning assembly is located between the two first positioning blocks 2, the seat body 51 of the second positioning block 5 is provided with two first clamping grooves 511, one profiled clamping plate 52 is arranged in each of the two first clamping grooves 511, and the third limiting groove 61 extends on the third positioning block 6 along the axial direction of the rotating shaft 101 to jointly act with the two profiled clamping plates 52 to position the two second gears 103. More specifically, the fixing pin 7 is provided with two, the two ends of the second positioning block 5 are provided with the first boss 512 and the second boss 513, the two ends of the third positioning block 6 are provided with the third boss 63, and the two ends of the first boss 512, the second boss 513 and the third boss 63 are fixed by the fixing pin 7.

[0124] Referring to Figure 7 and Figure 8 , the first boss 512 and the second boss 513 are provided with connecting holes for fixing the fixing pin 7, the connecting holes are provided with bearings 515, and the fixing pin 7 is arranged in the inner hole of the bearing 515. By arranging the bearing 515, the friction when the fixing pin 7 passes through the first boss 512 and the second boss 513 can be reduced, and the fixing pin 7 can be arranged more smoothly. The bearing 515 is exemplarily a sliding roller bearing.

[0125] Referring to Figure 7 , Figure 8 , the second positioning assembly further comprises a second limiting insert plate 8. The second limiting insert plate 8 is provided with two second insert grooves 81 at intervals, the interval between the two second insert grooves 81 conforms to the designed interval between the two second gears 103, and the two second insert grooves 81 correspond to the two second gears 103 to ensure that the interval between the two second gears 103 remains unchanged during welding.

[0126] Referring to Figure 8 andFigure 9 The third positioning block 6 is further provided with an operation port 64 in communication with the third limiting groove 61, and the operation port 64 can allow a welding gun of a welding device to pass through to weld the connection between the second gear 103 and the rotating shaft 101.

[0127] As shown in Figure 13 and Figure 14 , a schematic view of the third positioning assembly for positioning the rotating shaft 101. The third positioning assembly includes a fourth positioning block 9 and a second positioning pin 10. The fourth positioning block 9 is arranged on the base 1 and spaced from the first positioning block 2, and the fourth positioning block 9 is concavely provided with a fourth limiting groove 91; the second positioning pin 10 is arranged through the fourth positioning block 9 and can block the slot of the fourth limiting groove 91, the rotating shaft 101 is clamped in the fourth limiting groove 91 and abuts against the second positioning pin 10, that is, the second positioning pin 10 and the inner wall of the fourth limiting groove 91 surround a limiting space for arranging the limiting rotating shaft 101. The groove wall of the fourth limiting groove 91 and the second positioning pin 10 abut against the rotating shaft 101, which can effectively prevent the rotating shaft 101 from moving along its radial direction while positioning the rotating shaft 101.

[0128] In combination with Figure 2 and Figure 3 , the third positioning assembly is exemplarily provided with two, the two third positioning assemblies are arranged on the two sides of the second positioning assembly and between the two first positioning assemblies, and the two third positioning assemblies are arranged opposite to each other, and the rotating shaft 101 is arranged in the limiting spaces of the two third positioning assemblies, which can ensure that the straightness of the rotating shaft 101 during the welding process will not be deformed beyond the design requirement due to welding stress and other factors.

[0129] Referring to Figure 3 , Figure 13 and Figure 14 , the fourth positioning block 9 is convexly provided with a fourth boss 92 and a fifth boss 93, and the fourth limiting groove 91 is located between the fourth boss 92 and the fifth boss 93, and the second positioning pin 10 is arranged through the fourth boss 92 and the fifth boss 93 to limit the rotating shaft 101 together with the fourth limiting groove 91. When positioning the rotating shaft 101, the rotating shaft 101 can be arranged in the fourth limiting groove 91 first, and then the second positioning pin 10 is arranged through the fourth boss 92 and the fifth boss 93 to limit the rotating shaft 101 above the rotating shaft 101.

[0130] Further, the positioning tool further includes a pressing member, the second positioning pin 10 is provided with a pressing hole 110, and the pressing member can be screwed in the pressing hole 110 and abut against the rotating shaft 101, which further improves the stability of the rotating shaft 101 in the fourth limiting groove 91 and prevents displacement under the welding stress. The pressing member is exemplarily a bolt.

[0131] In the embodiment, the fourth limiting groove 91 is a V-shaped groove, which can be suitable for the rotating shaft 101 with different diameters, and only needs to press the rotating shaft 101 tightly.

[0132] Referring to Figure 3 and Figure 13 One end surface of the second positioning pin 10 is provided with a handle hole 120, the handle hole 120 is used for installing a handle, and the second positioning pin 10 is conveniently penetrated on the fourth positioning block 9. The handle hole 120 is exemplarily a threaded hole, and a bolt can be installed as the handle.

[0133] Obviously, the above embodiments of the utility model are only for clearly illustrating the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be made without departing from the protection scope of the utility model. Here, all the embodiments need not and cannot be exhausted. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A positioning fixture, characterized in that, The positioning fixture is used to position a gear drive shaft (100), the gear drive shaft (100) includes a rotating shaft (101) and a first gear (102) sleeved on the rotating shaft (101); the positioning fixture includes a base (1), a first positioning block (2) and a plurality of first positioning pins (3); The first positioning block (2) is disposed on the base (1), and the first positioning block (2) is provided with a positioning groove (21), which engages with the first gear (102); The first gear (102) is provided with a first through hole (1028) and a positioning hole (1025). The first through hole (1028) is used to pass through the rotating shaft (101). The positioning hole (1025) is spaced apart from the first through hole (1028) and extends along the circumference of the first gear (102). The first end of the positioning hole (1025) is provided with a first inner wall surface (10251), and the second end of the positioning hole (1025) is provided with a second inner wall surface (10252). The first end and the second end of the positioning hole (1025) are the two ends of the positioning hole (1025) along its own extension direction. Multiple first positioning pins (3) are inserted through the first positioning block (2) and the positioning hole (1025), at least one first positioning pin (3) abuts against the first inner wall surface (10251), and at least one first positioning pin (3) abuts against the second inner wall surface (10252).

2. The positioning fixture according to claim 1, characterized in that, The first gear (102) includes a first side surface (1021) and a second side surface (1022), a third side surface (1029) and a fourth side surface (10210) arranged at an angle. The third side surface (1029) and the fourth side surface (10210) are respectively two sides of the first gear (102) along the axial direction. The first side surface (1021) and the second side surface (1022) are both connected between the third side surface (1029) and the fourth side surface (10210). The first positioning block (2) includes a first positioning plate (22) and a second positioning plate (23); the second positioning plate (23) is detachably connected to the first positioning plate (22); The first positioning plate (22) is provided with a first limiting groove (221), the first limiting groove (221) has a first positioning surface (2211), a second positioning surface (2212) and a third positioning surface (2215), the first positioning surface (2211), the second positioning surface (2212), the third positioning surface (2215) and the second positioning plate (23) surround to form the positioning groove (21); the first positioning surface (2211) is in contact with the first side surface (1021), the second positioning surface (2212) is in contact with the second side surface (1022); the third positioning surface (2215) is in contact with the third side surface (1029), and the second positioning plate (23) is in contact with the fourth side surface (10210); The first positioning pin (3) passes through the first positioning plate (22) and the positioning hole (1025); or, the first positioning pin (3) passes through the second positioning plate (23) and the positioning hole (1025).

3. The positioning fixture according to claim 2, characterized in that, The first side surface (1021) is provided with a first protrusion (1023), and the second side surface (1022) is provided with a second protrusion (1024); The first positioning surface (2211) is recessed with a first positioning groove (2213), and the second positioning surface (2212) is recessed with a second positioning groove (2214); The first positioning groove (2213) engages with the first protrusion (1023), and the second positioning groove (2214) engages with the second protrusion (1024).

4. The positioning fixture according to claim 1, characterized in that, The rotating shaft (101) is provided with a plurality of the first gears (102); Multiple first positioning blocks (2) are arranged at intervals along the axial direction of the rotating shaft (101), and each of the multiple first positioning blocks (2) corresponds to a multiple of the first gears (102). The first positioning block (2) at one end is provided with a through-hole (24) for passing through the rotating shaft (101), and the through-hole (24) is connected to the positioning groove (21). The first positioning block (2) at the other end is provided with a stop limiting surface (25), and the stop limiting surface (25) abuts against the end face of the rotating shaft (101).

5. The positioning fixture according to claim 1, characterized in that, The first gear (102) is provided with a plurality of first meshing teeth (1026) in the circumferential direction; The positioning fixture also includes a first limiting plate (4), on which a plurality of first slots (41) are provided, and the plurality of first slots (41) are engaged one-to-one with the first meshing teeth (1026) of the plurality of first gears (102).

6. The positioning fixture according to any one of claims 1-5, characterized in that, The gear drive shaft (100) also includes a second gear (103) sleeved on the rotating shaft (101); the second gear (103) has a fifth side surface (1036) and a sixth side surface (1037) respectively on both sides along the axial direction; The positioning fixture also includes a second positioning block (5) and a third positioning block (6) that can be detachably connected; The second positioning block (5) is provided with a second limiting groove (521), a fourth positioning surface (5111) and a fifth positioning surface (5112). The second limiting groove (521) engages with the first end of the second gear (103). The fourth positioning surface (5111) is in contact with the fifth side surface (1036). The fifth positioning surface (5112) is in contact with the sixth side surface (1037). The third positioning block (6) is provided with a third limiting groove (61), which engages with the second end of the second gear (103).

7. The positioning fixture according to claim 6, characterized in that, The second positioning block (5) includes a base (51) and a contour plate (52); The base (51) is recessed with a first slot (511), and the groove wall of the first slot (511) includes the fourth positioning surface (5111) and the fifth positioning surface (5112). The contoured card plate (52) is inserted into the first card slot (511), and the contoured card plate (52) is provided with the second limiting groove (521); the contoured card plate (52) is provided with a stop block (522), and the stop block (522) abuts against the base (51) in the insertion direction, which is the direction in which the contoured card plate (52) is inserted into the first card slot (511).

8. The positioning fixture according to claim 6, characterized in that, The second gear (103) includes a seventh side surface (1031) and an eighth side surface (1032) arranged at an angle, and a plurality of second meshing teeth (1033). The seventh side surface (1031) and the eighth side surface (1032) are both connected between the fifth side surface (1036) and the sixth side surface (1037). The plurality of second meshing teeth (1033) are distributed circumferentially along the second gear (103). The second limiting groove (521) is used to engage multiple second meshing teeth (1033); The third limiting groove (61) has a groove wall including a sixth positioning surface (611) and a seventh positioning surface (612) arranged at an angle. The sixth positioning surface (611) is in contact with the seventh side surface (1031), and the seventh positioning surface (612) is in contact with the eighth side surface (1032).

9. The positioning fixture according to claim 6, characterized in that, The positioning fixture also includes a fixing pin (7); The second positioning block (5) is provided with a first boss (512), a second boss (513) and a second slot (514); the first boss (512) and the second boss (513) are spaced apart, and the second slot (514) is located between the first boss (512) and the second boss (513); The third positioning block (6) is engaged in the second slot (514), and the third limiting groove (61) and the second slot (514) form a rotating shaft channel (62) that allows the rotating shaft (101) to pass through; the third positioning block (6) is provided with a third boss (63); The fixing pin (7) passes through and connects the first boss (512), the second boss (513) and the third boss (63).

10. The positioning fixture according to any one of claims 1-5, characterized in that, The positioning fixture also includes a fourth positioning block (9) and a second positioning pin (10); The fourth positioning block (9) is disposed on the base (1) and spaced apart from the first positioning block (2). The fourth positioning block (9) is recessed with a fourth limiting groove (91). The second positioning pin (10) passes through the fourth positioning block (9) and can block the opening of the fourth limiting groove (91); The rotating shaft (101) is engaged in the fourth limiting groove (91) and abuts against the second positioning pin (10).

11. The positioning fixture according to claim 10, characterized in that, The fourth positioning block (9) is provided with a fourth protrusion (92) and a fifth protrusion (93), the fourth limiting groove (91) is located between the fourth protrusion (92) and the fifth protrusion (93), and the second positioning pin (10) passes through the fourth protrusion (92) and the fifth protrusion (93). And / or, the fourth limiting groove (91) is a V-shaped groove, a U-shaped groove, or an arc-shaped groove; And / or, the positioning fixture further includes a clamping member, the second positioning pin (10) is provided with a clamping hole (110), the clamping member can be threaded into the clamping hole (110) and abut against the rotating shaft (101).

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