Flaring device

Abstract

The utility model discloses a flaring device. The flaring device comprises a worm gear, a conical head seat, a movable nut, a screw rod, a linkage pin, a base, an elastic body and a fixing piece. A sliding groove for driving the linkage pin to move front and back is formed in the worm gear, and the driving pin is arranged in the sliding groove and is in linkage with the conical head base and the movable nut so that the conical head base, the movable nut and the linkage pin can keep moving front and back. The movable nut is in threaded connection with the screw rod to drive the screw rod and the movable nut to move in opposite directions; the screw rod is in constraint fit with the base through a fixing piece, an elastic body is arranged between the screw rod and the base, and the elastic body and the screw rod are in extrusion fit to dissipate heat through the fixing piece and the base. According to the technical scheme, the structure of the flaring device is optimized, and heat dissipation of an elastic piece of the flaring device is facilitated.

Description

Technical Field

[0001] The utility model relates to an electric tool, in particular to a mouth expander. Background Art

[0002] In the existing expander, the copper tube is spun into a bell mouth by rotating the cone head, and an elastic part is arranged in the cone head seat to adjust the deformation of the copper tube so that the size of the copper tube bell mouth tends to be uniform. However, the size of the cone head seat limits the arrangement of the elastic part. At the same time, the heat generated by the elastic part during the compression process and the heat generated by the screw during the working process accumulate in the cone head seat and are not easy to dissipate, resulting in the continuous working performance of the machine being limited. Utility Model Content

[0003] The utility model aims to provide a mouth expander, and solves the technical problem of optimizing the structure of the mouth expander to facilitate heat dissipation of the elastic parts of the mouth expander.

[0004] An expander, comprising a worm gear, a cone head seat, a movable nut, a screw, a linkage pin, a base, an elastic body, and a fixing part;

[0005] The worm gear has a sliding groove for driving the linkage pin to move back and forth. The driving pin is arranged in the above sliding groove and is linked with the cone head seat and the movable nut to realize the cone head seat, the movable nut and the linkage pin to maintain forward and backward movement; the movable nut is threadedly connected to the screw to drive the screw and the movable nut to move in relative directions; the above screw is constrained and matched with the base through a fixing part, and an elastomer is arranged between the screw and the base, and the above elastomer is squeezed and matched with the screw.

[0006] The screw has an outwardly extending protruding extension portion, one side of the elastic body is in contact with the extension portion, and the other side of the elastic body is in contact with the inner wall of the base; the screw is fixed to the fixing piece at the end facing the fixing piece by screws.

[0007] One end of the cone head seat has a cavity with a cone head arranged through a bearing, and the other end also has a cavity with a movable nut and a threaded portion of a screw; the side of the cone head seat close to the movable nut is penetrated and fixed by a linkage pin.

[0008] The movable nut is hollow inside, and its inner wall has a thread that is screwed to the threaded portion of the screw rod; the outer wall of the movable nut has a cavity that cooperates with the linkage pin.

[0009] The worm gear includes a ring gear and a gear seat. The outer wall of the ring gear has multiple helical teeth and is hollow inside. The gear seat is arranged in the hollow position inside the ring gear and is fixed to the ring gear. The above-mentioned slide groove is arranged on the inner wall of the gear seat and is aligned with the axial center of the gear seat. The above-mentioned helical teeth cooperate with the worm on the expander, and the above-mentioned worm cooperates with the motor through the connecting shaft to realize that the worm drives the ring gear to rotate; the above-mentioned connecting shaft has a cavity inside which is fixed to the rotating shaft and screw of the motor respectively.

[0010] There are two linkage pins arranged opposite to each other, and there are two corresponding sliding grooves.

[0011] One side of the base has a cavity inside for arranging an elastic body and a part of a screw, and the other side of the base is fitted with a fixing piece.

[0012] The expander is equipped with a connector, a bearing, and a support sleeve; the support sleeve is hollow inside and sleeved on the outside of the cone head seat, the bearing sleeve is sleeved on the outside of the support sleeve, and the connector has a cavity inside and is equipped with the bearing and the support sleeve.

[0013] The expander comprises a left casing and a right casing which are fixedly enclosed with each other.

[0014] The expander is equipped with a gear box, which is fixed to the left housing by screws; the gear box is hollow inside and has a hole on its side, which is configured with the base and the fixing piece.

[0015] The beneficial effect of the present invention is that by disposing the elastomer between the screw and the base, the elastic member is removed from the inside of the cone head seat, reducing heat accumulation, so that the elastic member can quickly dissipate heat through the base and the fixing member, thereby improving its continuous working ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the expander;

[0017] Figure 2 This is a schematic diagram of the expander from another angle;

[0018] Figure 3 It is an internal cross-sectional view of the expander;

[0019] Figure 4 It is a schematic diagram of the configuration of the internal components of the expander;

[0020] Figure 5 yes Figure 4 A schematic diagram of the expander from another angle;

[0021] Figure 6 yes Figure 4 Exploded diagram of the components;

[0022] Figure 7 yes Figure 6 A schematic diagram of another angle of the components;

[0023] Figure 8 yes Figure 3 The middle AA section view shows the schematic diagram when spinning begins;

[0024] Figure 9 It is a schematic diagram showing the spinning process;

[0025] In the picture

[0026] 11. Left housing, 12. Right housing;

[0027] 2. Connector;

[0028] 31. Cone head, 32. Cone head seat, 33. Bearing, 34. Support sleeve, 35. Worm gear, 351. Ring gear, 3511. Key, 352. Gear seat, 3521. Slide groove, 36. Screw, 361. Threaded portion, 362. Extension portion, 37. Traveling nut, 38. Linkage pin, 39. Base, 310. Gearbox, 311. Fixing member, 312. Elastomer, 313. Screw;

[0029] 41. Motor, 42. Connecting shaft, 43. Worm;

[0030] 5. Pipes;

[0031] 6. Locking clip. DETAILED DESCRIPTION

[0032] Please refer to Figures 1 to 9 The expander shown in the figure has an optimized internal design, thereby optimizing the heat dissipation of the elastic body 312. The expander mainly includes the housing, connector 2, cone head 31, cone head seat 32, support sleeve 34, worm gear 35, screw 36, movable nut 37, linkage pin 38, base 39, gear box 310, fixing part 311, elastic body 312, motor 41, connecting shaft 42, worm 43 and other components, thus achieving the above-mentioned heat dissipation optimization effect.

[0033] The casing in the figure is composed of two parts, namely the left casing 11 and the right casing 12, which are designed and fixed to each other, and can also be called the first casing and the second casing. The above two casings can use existing components or perform adaptive optimization design to match the optimized internal components. The function of the casing is to enclose and fix the internal components.

[0034] The connector 2 in the figure can also use existing components. The function of the connector 2 is to facilitate the fixation of the locking clamp 6. The interior of the connector 2 is hollow to facilitate the sheathing of the pipe 5.

[0035] The cone head 31 in the figure is an existing component, which has an umbrella-shaped structure as a whole and an arrow-shaped structure in longitudinal section. Its function is to expand the pipe 5, so that the expansion operation can be performed when the conical seat moves forward. The cone head 31 is installed on the cone head seat 32 through a bearing 33.

[0036] The cone head seat 32 in the figure can also be made of existing components and adopts a cylindrical structure. The function of the cone head seat 32 is to fix the cone head 31. One side of the cone head seat has an inclined surface and a cavity to facilitate the installation of the cone head 31. The other side is a flat surface and a stepped cavity to facilitate the installation of the screw 36 and the movable nut 37. At the same time, the inner wall of the other side, that is, the side close to the movable nut 37, is penetrated by a linkage pin 38 at two opposite positions. The linkage pin 38 penetrates the wall of the cone head seat 32 and is fixed to the movable nut 37. Under the action of the linkage pin 38, the cone head seat 32 can move toward or away from the pipe 5 to perform the expansion operation or reverse to return to the initial position.

[0037] The bearing 33 in the figure is an existing conventional component. As shown in the figure, the outer wall of the support sleeve 34 and the cavity on one side of the cone head seat 32 both have a bearing 33 structure, which is used to enable the two components on which the bearing 33 is installed to rotate relative to each other.

[0038] The support sleeve 34 in the figure is a hollow cylindrical structure, which is used to facilitate fixation with the cone head seat 32 and is sleeved inside the connector 2 through the bearing 33, so that it can move in conjunction with the cone head seat 32 while maintaining relative rotation with the connector 2.

[0039] The worm gear 35 in the figure is designed with two parts: a ring gear 351 and a tooth seat 352. The function of the worm gear 35 is to use the drive of the worm 43 to rotate the ring gear 351 and the tooth seat 352, so that the linkage pin 38 moves forward or backward. The above-mentioned ring gear 351 is an annular internal hollow structure, and its outer wall has a plurality of helical teeth that mesh with the teeth of the worm 43 and are coated with wheel oil to ensure mutual transmission. There is a key 3511 inside to cooperate with the groove on the tooth seat 352 to realize that the ring gear 351 drives the tooth seat 352 to rotate. The above-mentioned worm 35 is an involute cylindrical worm, and the ring gear 351 adopts an involute tooth shape, with the same module, the same direction of rotation, the same pressure angle, such as 20 degrees, and the same helix angle, such as in the range of 4-8 degrees. For details, please refer to the following. Figure 3 The tooth holder 352 is a stepped cylindrical structure, located within the hollow interior of the ring gear 351 and secured to the ring gear 351. The tooth holder 352 drives the linkage pin 38 forward or backward when rotated. Its inner wall has a slot 3521 aligned with the axis of the tooth holder 352, which facilitates the forward and backward movement of the linkage pin 38. Two opposing slots 3521 are shown, corresponding to the two linkage pins 38.

[0040] The screw 36 in the figure is a circular shaft structure similar to a cross. The function of the screw 36 is to cover the elastomer 312. The position where it cooperates with the movable nut 37 has a threaded portion 361 with a threaded structure, and near the middle position is an extension portion 362 structure with an annular protrusion extending outward, which blocks the elastomer 312 so that it is always fixed inside the base 39. The other side opposite to the threaded portion 361 has an internal thread, which is screwed and fixed with a screw 313 and fixed to the base 39 through the fixing member 311.

[0041] The cross-section of the movable nut 37 in the figure is an F-shaped structure while maintaining a hollow interior with threads. The F-shaped structure forms a cavity to facilitate fixing the linkage pin 38. At the same time, the threads cooperate with the screw 36 to realize the relative movement of the movable nut 37 and the screw 36. In this way, when the movable nut 37 moves toward the direction of the pipe 5, the screw 36 moves in the opposite direction to squeeze the elastomer 312. Otherwise, it maintains the initial state with the elastomer 312.

[0042] The linkage pin 38 shown in the figure is a columnar structure that drives the movable nut 37. One end of the linkage pin 38 is positioned within the slot 3521 of the tooth holder 352. When the tooth holder 352 rotates, the linkage pin 38 is driven to move in conjunction with the cone head holder 32, the movable nut 37, and the linkage pin 38, thereby maintaining forward and backward movement. Two linkage pins 38 are shown in the figure, corresponding to two slots 3521.

[0043] The base 39 in the figure is a cylindrical structure with an opening on one side of the interior being hollow and a screw hole on the other side for facilitating the installation of the screw 313 and the insertion of one end of the screw rod 36. The above opening facilitates the enclosing of the screw rod 36 and the elastomer 312, wherein the diameter of the extension portion 362 of the screw rod 36 just covers the above opening and encloses the elastomer 312.

[0044] The gear box 310 in the figure is a component with a shell structure and can adopt existing components. Its interior is hollow to facilitate the placement of components shown in the figure. The gear box 310 is installed and fixed together with the connector 2 by screws 313 or bolts, and a fixing part 311 is installed at the end. The fixing part 311 and the base 39 together dissipate the heat of the elastomer 312. The fixing part 311 can be a washer or a nut.

[0045] The fixing part 311 in the figure is an existing component, and its function is to close the end of the gear box 310 and the fixing screw 36 while cooperating with the base 39 to dissipate heat. The fixing part 311 is a disc-shaped structure as a whole, and the fixing part 311 and the screw 36 can be fixed together by screws 313.

[0046] The elastomer 312 in the figure is an existing conventional component. It has a hollow cylindrical structure and is located between the screw 36 and the base 39. One side of the elastomer 312 is in contact with the above-mentioned extension 362, and the other side is in contact with the inner wall of the base 39. It is deformed or restored to its original shape by the extrusion of the screw 36.

[0047] The motor 41, connecting shaft 42 and worm 43 in the figure are all conventional components. The connecting shaft 42 has a cavity inside which is fixed to the rotating shaft and screw 36 of the motor 41 respectively, so that when the motor 41 rotates, it can drive the worm 43 to rotate, and then drive the ring gear 351 to rotate.

[0048] Through the configuration of the above structure, the locking clamp 6 clamps the pipe 5 and connects it to the machine. After the machine is started, the motor 41 drives the worm 43, and the worm 43 drives the ring gear 351 to rotate. The ring gear 351 has the above-mentioned slide groove 3521. The slide groove 3521 uses the linkage pin 38 to drive the cone head seat 32 and the movable nut 37 to rotate. During the rotation process, the cone head seat 32 drives the cone head 31 to approach the pipe 5 and spin it into a bell mouth. During the spinning process, the screw 36 compresses the elastomer 312 under the drive of the reaction force, and gradually increases the spinning force through the deformation of the elastomer 312. When the torque of the motor 41 reaches the preset value, the motor 41 starts to reverse, and the cone head 31 moves back to the initial position.

[0049] The specific embodiments described above are merely intended to explain the present technical solution and are not intended to limit the present technical solution. In the description of the present technical solution, it should be noted that terms such as "upper" and "inner" indicate positions or location relationships based on the positions or location relationships shown in the accompanying drawings. These terms are used solely to facilitate the description of the present technical solution and to simplify the description. They do not indicate or imply that the device or component referred to must have a specific position, be constructed, or operate in a specific position. Therefore, they should not be construed as limiting the present technical solution.

[0050] At the same time, it should be noted that in the description of this technical solution, unless otherwise explicitly specified or limited, the terms "fixed" and "matched" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; they can refer to direct connection or indirect connection through an intermediate medium; they can refer to internal communication between two elements or interaction between two elements. For those skilled in the art, the specific meanings of the above terms in this technical solution can be understood according to specific circumstances.

[0051] Although embodiments of the present technical solution have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present technical solution, and the scope of the present technical solution is defined by the appended claims and their equivalents.

Claims

1. Expander, characterized by: It includes a worm gear (35), a cone head seat (32), a movable nut (37), a screw (36), a linkage pin (38), a base (39), an elastic body (312), and a fixing member (311); The worm wheel (35) has a slide groove (3521) for driving the linkage pin (38) to move forward and backward. The driving pin is arranged in the above-mentioned slide groove (3521) and is linked with the cone head seat (32) and the movable nut (37) to realize that the cone head seat (32), the movable nut (37) and the linkage pin (38) maintain forward and backward movement; the movable nut (37) and the screw rod (36) are screwed together to drive the screw rod (36) and the movable nut (37) to move in relative directions; the above-mentioned screw rod (36) is constrained and matched with the base (39) through the fixing member (311), and an elastic body (312) is arranged between the screw rod (36) and the base (39), and the above-mentioned elastic body (312) is squeezed and matched with the screw rod (36).

2. The expander according to claim 1, characterized in that: The screw rod (36) has an outwardly extending protruding extension portion (362), one side of the elastic body (312) is in contact with the extension portion (362), and the other side of the elastic body (312) is in contact with the inner wall of the base (39); the screw rod (36) is fixed to the fixing member (311) at its end facing the fixing member (311) by a screw (313).

3. The expander according to claim 1 or 2, characterized in that: One end of the cone head seat (32) has a cavity configured with a cone head (31) through a bearing (33), and the other end also has a cavity configured with a moving nut (37) and a threaded portion (361) of a screw rod (36); a side of the cone head seat (32) close to the moving nut (37) is penetrated and fixed by a linkage pin (38).

4. The expander according to claim 3, characterized in that: The movable nut (37) is hollow inside, and its inner wall has a thread that is screwed to the threaded portion (361) of the screw rod (36); the outer wall of the movable nut (37) has a cavity that cooperates with the linkage pin (38).

5. The expander according to claim 2, characterized in that: The worm wheel (35) includes a ring gear (351) and a tooth seat (352). The outer wall of the ring gear (351) has a plurality of helical teeth and is hollow inside. The tooth seat (352) is arranged at the hollow position inside the ring gear (351) and is fixed to the ring gear (351). The above-mentioned slide groove (3521) is arranged on the inner wall of the tooth seat (352) and is aligned with the axis center of the tooth seat (352). The above-mentioned helical teeth cooperate with the worm (43) on the expander. The above-mentioned worm (43) cooperates with the motor (41) through the connecting shaft (42) to realize that the worm (43) drives the ring gear (351) to rotate. The above-mentioned connecting shaft (42) has a cavity inside and is fixed to the rotating shaft of the motor (41) and the screw (36).

6. The expander according to claim 1, characterized in that: There are two linkage pins (38) arranged opposite to each other, and there are two corresponding sliding grooves (3521).

7. The expander according to claim 1, characterized in that: One side of the base (39) has a cavity inside which is configured an elastic body (312) and a portion of the screw (36), and the other side of the base (39) is fitted with the fixing member (311).

8. The expander according to claim 1, characterized in that: The expander is equipped with a connector (2), a bearing (33), and a support sleeve (34); the support sleeve (34) is hollow inside and sleeved on the outside of the cone head seat (32); the bearing (33) is sleeved on the outside of the support sleeve (34); and the connector (2) has a cavity inside and is equipped with the bearing (33) and the support sleeve (34).

9. The expander according to claim 1, characterized in that: The expander comprises a left casing (11) and a right casing (12), which are fixedly enclosed with each other.

10. The expander according to claim 9, characterized in that: The expander is equipped with a gear box (310), which is fixed to the left housing (11) via screws (313); the gear box (310) is hollow inside and has a hole on its side, which is configured with the base (39) and the fixing member (311).

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