CN115555484A - Intermittent rotation structure for expansion tool and expansion tool - Google Patents

Abstract

The invention discloses an intermittent rotating structure for an expanding tool, comprising: a rotating cam, a roller and a thimble, the roller is rotated and arranged at the tail of the thimble, the roller is in contact with the circumferential side wall of the rotating cam, and the front end of the thimble is covered with There is a rotating sleeve, the tail of the thimble is covered with a guide sleeve, the outer wall of the thimble located in the rotating sleeve and the guide sleeve is covered with a spring, the thimble moves along the direction of the guide groove set on the guide sleeve, and the outer wall of the rotating sleeve is driven. Rotate the gear, the end surface of the rotating sleeve close to the front end of the thimble is provided with a number of extensions; the end surface of the rotating cam is provided with an incomplete gear, and one side of the incomplete gear is driven with a first driven gear, on the first driven gear An extension rod is provided, and the extension rod extends to the rotating gear, and is connected to the rotating gear through the second driven gear; this scheme has the characteristics of simple structure, easy operation, and intermittently rotating conical expansion head.

Description

Intermittent rotation structure for expansion tool and expansion tool

technical field

The invention relates to the field of expansion tools, in particular to an intermittent rotating structure for the expansion tool and the expansion tool.

Background technique

Due to the rising cost of metal copper pipes, polymer pipe fittings are gaining popularity in more and more residential and commercial constructions. One of the more common types of polymer pipe fittings is made from cross-linked polyethylene, commonly known as PEX. Polymer pipe fittings have good toughness. Using the characteristics of slow contraction after the nozzle is expanded, it is connected to the joint before the nozzle is completely shrunk. After the complete shrinkage, the nozzle is tightly wrapped on the joint. The closer the expanded nozzle is to a circle, The better the airtightness between the connector and the connector. A typical building will have many joints, so the installation of fittings involves extending the nozzles of many pipes. At present, there is an expansion tool on the market. During use, it is found that after the end of the expansion tool is inserted into the pipe, because the expansion tool is operated by the worker's hand, that is, it is not easy to rotate, which causes the end of the pipe to be extended. The non-circular shape of the part is due to the shape of the conical expansion head installed at the end of the expansion tool. Therefore, when the pipe is expanded, the conical expansion head needs to be rotated so that the pipe is expanded. It is round, so that it is easy to fit and install with the joint, so that the expanded nozzle and the joint are closely matched, but the conical expansion head cannot be rotated all the time during the expansion process, otherwise the expansion of the pipe cannot be realized, so it is urgent to provide a The expansion tool uses the intermittent rotation structure and the expansion tool to solve the above problems.

Contents of the invention

Therefore, it is necessary to provide an intermittent rotation structure for an expansion tool and an expansion tool that are simple in structure, easy to operate, and can effectively rotate the conical expansion head.

In order to achieve the above object, the inventor provides an intermittent rotation structure for expanding tools, including: a rotating cam, a roller and a thimble, the roller is rotated at the tail of the thimble, and the roller is connected to the circumferential side of the rotating cam. The front end of the thimble is covered with a rotating sleeve, the tail of the thimble is provided with a guide sleeve, and the outer wall of the thimble located in the rotating sleeve and the guide sleeve is provided with a spring, and the thimble is set along the guide sleeve. The guide groove provided on the top moves in the direction of movement, the outer wall of the rotating sleeve is driven with a rotating gear, and the end surface of the rotating sleeve close to the front end of the thimble is provided with several extensions;

The end face of the rotating cam is provided with an incomplete gear, and one side of the incomplete gear is provided with a first driven gear, and an extension rod is arranged on the first driven gear, and the extension rod extends to the rotating gear and is connected with the rotating gear through the second driven gear.

As a preferred form of the present invention, the incomplete gear is provided with a meshing tooth, and the first driven gear includes a first tooth seat and a tooth seat provided on the first tooth seat and is connected to the incomplete gear for transmission. Connected first driven tooth.

As a preferred form of the present invention, the incomplete gear includes a tooth seat and an engaging tooth arranged on the tooth seat. The side of the first gear seat is a regular polygon, the first driven teeth are conical teeth, and the first driven teeth are in transmission connection with the meshing teeth.

As a preferred mode of the present invention, the side of the first tooth seat is in contact with the side of the side of the tooth seat of the incomplete gear that is close to the meshing teeth, and the corner of the first tooth seat connecting the two sides passes through the The notch provided on the tooth seat of the complete gear rotates in transition.

As a preferred mode of the present invention, the regular polygons include regular triangles, regular quadrilaterals, regular pentagons, regular hexagons, regular heptagons and regular octagons.

As a preferred form of the present invention, the rotating sleeve is provided with a first step close to the rotating gear, on which several protrusions are provided, and on the inner wall of the rotating gear is provided with several locking slots, so The card slot is engaged with the raised part.

As a preferred form of the present invention, there is a gap between the side wall of the first step and the rotating gear, and inclined surfaces are provided on the side walls on both sides of several extensions provided on the end surface of the rotating sleeve.

As a preferred mode of the present invention, the end of the rotating sleeve close to the guide sleeve is sheathed in the guide sleeve.

As a preferred form of the present invention, a second step is provided on the inner side wall of one end of the rotating sleeve close to the guide sleeve, a third step is provided on the rear end of the thimble, and the two ends of the spring Arriving at the second and third steps respectively.

In order to achieve the above object, the inventor also provides an expansion tool, which includes the intermittent rotation structure for the expansion tool described in any one of the above-mentioned contents of the invention, and also includes a casing, a fixed sleeve and a conical expansion head. The expansion tool The intermittent rotation structure is set in the casing, the front end of the thimble and the rotating sleeve extend from the casing, the fixed sleeve is set on the rotating sleeve, and is fixedly connected with the casing, and the conical expansion head is movable It is detachably arranged on the fixing sleeve, and the thimble is used to expand the conical expansion head.

Different from the prior art, the beneficial effects achieved by the above-mentioned technical solution are: the arrangement of the incomplete gear in this structure, and the cooperation with the first driven gear, effectively realize the intermittent transmission, when the incomplete gear When the teeth mesh with the first driven gear, the first driven gear is driven to rotate at a certain angle, thereby driving the extension rod and the second driven gear to rotate intermittently, which further drives the rotating gear to rotate intermittently, and the rotating gear Drive the rotary sleeve to rotate intermittently, and the rotary sleeve drives the conical expansion head to rotate intermittently, thus effectively realizing the intermittent rotation of the conical expansion head, so that the expanded part of the pipe is round and easier to match with the joint , It also avoids problems such as poor matching and penetration of non-circular shapes; in addition, the intermittent rotation structure is not only simple in structure, but also easy to operate, without providing an additional power source.

Description of drawings

Fig. 1 is a schematic diagram of the intermittent rotation structure of the expansion tool described in the specific embodiment;

Fig. 2 is a cross-sectional view of the intermittent rotation structure for the expansion tool described in the specific embodiment;

Fig. 3 is a schematic diagram of the structure of the incomplete gear described in the specific embodiment;

Fig. 4 is a schematic diagram of the installation structure of the incomplete gear and the first driven gear described in the specific embodiment;

Fig. 5 is a schematic diagram of the installation structure of the rotating sleeve described in the specific embodiment;

Fig. 6 is a schematic diagram of the installation structure of the rotary sleeve and the rotary gear described in the specific embodiment;

Fig. 7 is a schematic diagram of the installation structure of the tapered expansion head described in the specific embodiment;

Fig. 8 is a cross-sectional view of the expansion tool described in the specific embodiment.

Explanation of reference signs:

101, rotating cam; 102, rotating shaft; 103, bearing; 104, casing; 105, fixed sleeve; 106, conical expansion head; 107, engaging place; 201, roller; 202, spring; 301, thimble; 302, the third step; 401, the rotating sleeve; 402, the extension; 403, the slope; 404, the first step; 405, the raised part; 406, the second step; 501, the guide sleeve; 502, the guide groove; 601, Rotating gear; 602, card slot; 7, incomplete gear; 701, gear seat; 702, occlusal teeth; 703, notch; 801, first driven gear; 8011, first tooth seat; 8012, first driven tooth ; 802, the extension rod; 803, the second driven gear; 901, the clearance.

detailed description

In order to explain in detail the technical content, structural features, achieved goals and effects of the technical solution, the following will be described in detail in conjunction with specific embodiments and accompanying drawings.

As shown in Figure 1 and Figure 2, the present embodiment provides an intermittent rotation structure for expanding tools, including: a rotating cam 101, a roller 201 and a thimble 301, the roller is rotated at the tail of the thimble, the roller and the rotating cam The circumferential side wall of 101 is contacted and connected, the front end of the thimble is provided with a rotating sleeve 401, the tail of the thimble is provided with a guide sleeve 501, and the outer wall of the thimble located in the rotating sleeve and the guide sleeve is provided with a spring 202, and the thimble along the The guide groove 502 set on the guide sleeve moves in the direction, the outer wall of the rotating sleeve is driven with a rotating gear 601, and the end face of the rotating sleeve near the front end of the thimble is provided with several extensions 402; the end face of the rotating cam is provided with an incomplete gear 7 , one side of the incomplete gear 7 is driven with a first driven gear 801, the first driven gear is provided with an extension rod 802, the extension rod extends to the rotating gear, and is transmitted through the second driven gear 803 and the rotating gear 601 connect.

In this embodiment, when the rotary cam 101 rotates, the roller 201 rolls along the circumferential side wall of the rotary cam, thereby driving the thimble to move back and forth in the rotary sleeve and the guide sleeve. At this time, the front end of the thimble 301 drives the expansion of the conical expansion head to realize the expansion of the pipe fitting. In this embodiment, the conical expansion head 106 adopts the existing conical expansion Head 106, as shown in Figure 7 and Figure 8, with the rotation of the rotary cam, the roller gradually rolls to the recess of the rotary cam, at this time, the thimble 301 is withdrawn from the conical expansion head, the conical expansion head shrinks, and the position is changed Finally, with the continuous reciprocating movement of the thimble, the end of the pipe is expanded; in this embodiment, in order to make the pipe as round as possible after expansion, it is more consistent when mating with the joint to avoid later use , leakage occurs, in this embodiment, an intermittent rotation structure is provided, the first driven gear 801 is driven by the incomplete gear 7, and then the extension rod 802 and the second driven gear 803 are driven, and the second driven gear drives The rotating gear rotates intermittently, thereby driving the rotating sleeve to rotate, realizing the intermittent rotation between the rotating sleeve and the conical expansion head. When the tube expansion is not completed once, the rotating sleeve drives the conical expansion head to rotate at a certain angle. After changing the position The pipe fitting is expanded again, so that the pipe fitting is as round as possible after the pipe expansion, so that the pipe fitting and the joint can be better matched.

In the above-mentioned embodiment, as shown in Fig. 7 and Fig. 8, the rotating cam is connected with the motor (not shown in the figure) in the expansion tool through the rotating shaft 102, and the two ends of the rotating shaft 102 are fixed on the casing through bearings 103 In 104; when the motor starts to work and drives the rotating shaft 102 to rotate, the rotary cam rotates thereupon and starts to work.

In the above embodiment, as shown in FIG. 2 , the end of the rotating sleeve 401 close to the guide sleeve 501 is sheathed in the guide sleeve. A second step 406 is provided on the inner side wall of one end of the rotating sleeve 401 close to the guide sleeve, and a third step 302 extending outward is provided at the rear end of the thimble, and the two ends of the spring 202 are arranged against the second step and the third step 302.

As shown in Fig. 3 and Fig. 4, in this embodiment, the incomplete gear 7 is provided with a meshing tooth 702, and the first driven gear 801 includes a first tooth seat 8011 and is arranged on the first tooth seat, and is connected with the incomplete The first driven tooth 8012 of meshing gear transmission connection on the gear. In this embodiment, the incomplete gear 7 includes a tooth seat 702 and an engaging tooth 701 arranged on the tooth seat. The engaging tooth is a conical tooth. The side of the seat is a regular polygon, the first driven tooth is a conical tooth, and the first driven tooth is in transmission connection with the occlusal teeth. In this embodiment, setting the meshing teeth 701 and the first driven teeth 8012 as conical teeth can effectively improve the meshing force and make the transmission more stable; setting the side of the first gear as a regular polygon can make the meshing teeth and When the first driven gear is not engaged, the side can contact and connect with the side of the gear seat. At this time, the tooth seat can position the first driven gear so that it cannot rotate, further improving the stability of the structure, and also After the rotation of the first driven gear, the deviation of the cooperation between the meshing teeth and the first driven gear is avoided, so that the expansion frequency and the expansion time interval of the rotary sleeve to the conical expansion head are not uniform, resulting in poor expansion effect. Serious damage will result in damage to the extension tool.

In different embodiments, the meshing teeth of the incomplete gears can also be set in several places as required, and at this time, a notch 703 is provided on the tooth seat of each meshing tooth.

In the above embodiment, the side of the first tooth seat is in contact with the side of the tooth seat of the incomplete gear near the meshing teeth, and the corner of the first tooth seat connecting the two sides is set on the tooth seat of the incomplete gear The transitional rotation of the notch; in this embodiment, the setting of the notch on the tooth seat is used to realize the corner of the first tooth seat connecting the two sides of the regular polygon can just pass through the notch to rotate from the previous side to the next One side realizes an intermittent rotation; when the meshing teeth and the first driven teeth complete a mesh, the meshing teeth are separated from the first driven teeth, and at this time the tooth seat of the incomplete gear and the first driven gear The first driven gear is positioned in contact with the side of a tooth seat, and when the meshing teeth engage with the first driven gear again, the first driven gear completes a certain angle of rotation.

In the above embodiments, regular polygons include regular triangles, regular quadrilaterals, regular pentagons, regular hexagons, regular heptagons and regular octagons. Certainly, in different embodiments, it may also be other regular polygons; in this embodiment, as shown in FIG. 4 , the regular polygon is a regular pentagon.

As shown in Figure 5 and Figure 6, in this embodiment, the rotating sleeve is provided with a first step 404 close to the rotating gear, on the first step there are several protrusions 405, and on the inner wall of the rotating gear there are several card slots , 602 The slot is engaged with the protrusion 405; in this embodiment, the rotating sleeve 401 is connected to the rotating gear 601 through the slot and the protrusion.

In some embodiments, as shown in Figure 6 and Figure 7, in order to achieve two-way detachment, that is, in the process of using the expansion tool, due to the reciprocating movement of the thimble, the rotating sleeve will move forward. When it is placed at the top position, the rotating sleeve and the conical expansion head will always be engaged, and the conical expansion head cannot be separated from the pipe fitting. In this embodiment, a two-way detachment structure is provided, that is, at the first step There is a gap 901 between the side wall and the rotating gear, and the side walls on both sides of several extensions provided on the end surface of the rotating sleeve are provided with inclined surfaces; When the expansion head cannot be removed from the pipe, at this time, the body of the expansion tool can be twisted in both directions. At this time, the inclined surface 402 provided on the end surface of the rotary sleeve will be disengaged from the engaging part 107 of the tapered expansion head 106 (as shown in Figure 7 As shown), the rotating sleeve moves backward, and the gap provided between the side wall of the first step and the rotating gear provides a space for the rotating sleeve to move backward. Therefore, the effect of two-way pipe removal is effectively realized.

As shown in Figures 7 and 8, this embodiment also provides an expansion tool, including the intermittent rotation structure for the expansion tool described in any one of the above embodiments, and also includes a casing 104, a fixed sleeve 105 and a cone Shaped expansion head 106, the expansion tool is set in the casing with an intermittent rotating structure, the front end of the thimble and the rotating sleeve extend from the casing, the fixed sleeve is sleeved on the rotating sleeve, and is fixedly connected with the casing, the tapered The expansion head is detachably arranged on the fixed sleeve, and the thimble is used to expand the tapered expansion head.

It should be noted that although the foregoing embodiments have been described herein, the scope of protection of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, the changes and modifications made to the embodiments described herein, or the equivalent structure or equivalent process conversion made by using the description of the present invention and the contents of the accompanying drawings, directly or indirectly apply the above technical solutions In other related technical fields, all are included in the patent protection scope of the present invention.

Claims (10)

1. An intermittent rotating structure for an expansion tool, characterized in that it includes: a rotating cam, a roller and a thimble, the roller is rotated at the tail of the thimble, and the roller is connected in contact with the circumferential side wall of the rotating cam The front end of the thimble is covered with a rotating sleeve, the tail of the thimble is provided with a guide sleeve, the outer wall of the thimble located in the rotating sleeve and the guide sleeve is provided with a spring, and the thimble is set along the guide sleeve. Moving in the direction of the guide groove, the outer wall of the rotating sleeve is driven with a rotating gear, and the end surface of the rotating sleeve close to the front end of the thimble is provided with several extensions; The end face of the rotating cam is provided with an incomplete gear, and one side of the incomplete gear is provided with a first driven gear, and an extension rod is arranged on the first driven gear, and the extension rod extends to the rotating gear and is connected with the rotating gear through the second driven gear. 2. The intermittent rotation structure for expanding tools according to claim 1, characterized in that: the incomplete gear is provided with a meshing tooth, and the first driven gear includes a first tooth seat and a tooth set on the first tooth seat , and the first driven tooth that is drivingly connected with the meshing teeth on the incomplete gear. 3. The intermittent rotation structure for expanding tools according to claim 2, characterized in that: the incomplete gear includes a tooth seat and engaging teeth arranged on the tooth seat, and the engaging teeth are conical teeth with an engaging tooth There is a notch on the tooth seat at the tooth, the side of the first tooth seat is a regular polygon, the first driven tooth is a conical tooth, and the first driven tooth is in transmission connection with the meshing tooth. 4. The intermittent rotation structure for expanding tools according to claim 3, characterized in that: the side of the first tooth seat is in contact with the side of the side of the tooth seat of the incomplete gear that is close to the meshing teeth, and the first The corners of the two sides connected by the gear seat are transitionally rotated through the gap provided on the tooth seat of the incomplete gear. 5 . The intermittent rotating structure for expanding tools according to claim 3 , wherein the regular polygons include regular triangles, regular quadrilaterals, regular pentagons, regular hexagons, regular heptagons and regular octagons. 6. The intermittent rotation structure for expanding tool according to claim 1, characterized in that: the rotating sleeve is provided with a first step near the rotating gear, and several protrusions are arranged on the first step, and the rotating The inner wall of the gear is provided with a plurality of card slots, and the card slots are engaged with the protrusions. 7. The intermittent rotating structure for expanding tools according to claim 6, characterized in that: there is a gap between the side wall of the first step and the rotating gear, and the extensions on the end surface of the rotating sleeve are arranged on both sides. The side walls are provided with inclined surfaces. 8 . The intermittent rotating structure for an expansion tool according to claim 1 , wherein the end of the rotating sleeve close to the guide sleeve is sheathed in the guide sleeve. 9 . 9. The intermittent rotation structure for expansion tool according to claim 1, characterized in that: the inner wall of one end of the rotating sleeve close to the guide sleeve is provided with a second step, and the rear end of the thimble is provided with an outwardly extending The third step, the two ends of the spring are set against the second step and the third step respectively. 10. An expansion tool, characterized in that it comprises the intermittent rotating structure for the expansion tool according to any one of claims 1 to 9, and also includes a casing, a fixed sleeve and a conical expansion head, and the intermittent rotation structure for the expansion tool is The rotating structure is set in the casing, the thimble and the front end of the rotating sleeve extend from the casing, the fixed sleeve is sleeved on the rotating sleeve, and is fixedly connected with the casing, and the conical expansion head is movable and detachable set on the fixed sleeve, and the thimble is used to expand the conical expansion head.

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