CN114458672A - Expansion stud - Google Patents
Expansion stud Download PDFInfo
- Publication number
- CN114458672A CN114458672A CN202210074101.8A CN202210074101A CN114458672A CN 114458672 A CN114458672 A CN 114458672A CN 202210074101 A CN202210074101 A CN 202210074101A CN 114458672 A CN114458672 A CN 114458672A
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- Prior art keywords
- expansion
- positioning
- sleeve
- bolt
- connecting bolt
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- 230000003014 reinforcing effect Effects 0.000 claims description 28
- 239000004033 plastic Substances 0.000 claims description 20
- 239000013013 elastic material Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 238000009434 installation Methods 0.000 description 10
- 239000002184 metal Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 230000002787 reinforcement Effects 0.000 description 7
- 238000005461 lubrication Methods 0.000 description 6
- 230000006378 damage Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 239000004952 Polyamide Substances 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 235000013399 edible fruits Nutrition 0.000 description 3
- 230000005489 elastic deformation Effects 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 229920002647 polyamide Polymers 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
- F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
- F16B13/063—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander
- F16B13/066—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander fastened by extracting a separate expander-part, actuated by the screw, nail or the like
- F16B13/068—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander fastened by extracting a separate expander-part, actuated by the screw, nail or the like expanded in two or more places
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/12—Separate metal or non-separate or non-metal dowel sleeves fastened by inserting the screw, nail or the like
- F16B13/124—Separate metal or non-separate or non-metal dowel sleeves fastened by inserting the screw, nail or the like fastened by inserting a threaded element, e.g. screw or bolt
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The invention belongs to the technical field of fasteners, and particularly relates to an expansion stud which comprises a positioning connecting bolt, a positioning expansion bolt, an expansion sleeve and an expansion pipe, wherein the positioning expansion bolt is fixedly connected with the positioning connecting bolt; according to the invention, the distance between the expansion sleeve and the expansion head is gradually reduced by screwing the positioning connecting bolt, because the first conical surface is arranged on the expansion head, the second conical surface is arranged on the expansion sleeve, and because the two ends of the expansion pipe are provided with the openings, the two ends of the expansion pipe are gradually expanded and spread through the first conical surface and the second conical surface, so that the two ends of the expansion pipe are expanded to fill the whole hole, and then the expansion stud is fixed in the hole, and then the measuring or processing equipment is fixed on the expansion stud, because the two ends of the expansion pipe are butted on the hole wall, the situation that the expansion stud deflects when being stressed radially when only one end of the expansion stud is butted is avoided, and the positioning accuracy when the expansion stud is used for temporary positioning is improved.
Description
Technical Field
The invention belongs to the technical field of fasteners, and particularly relates to an expansion stud.
Background
The expansion bolt utilizes the wedged slope to promote expansion to generate friction grip force, thereby achieving the fixing effect. One end of the stud is provided with threads, the other end of the stud is provided with a taper, a layer of metal sleeve is wrapped outside the stud, a plurality of notches are formed in one end, located at the taper, of the metal sleeve, the metal sleeve and the tapered ends are plugged into the drilled holes together, then the nut is locked, the screw is pulled outwards by the nut, the metal sleeve outside the screw is still, then the taper is pulled into the metal sleeve, the metal sleeve is expanded to fill the whole hole, and at the moment, the expansion bolt cannot be pulled out.
When some large parts need to be erected with measuring equipment or processing equipment, the measuring or processing equipment needs to be temporarily positioned and locked to be fixed on the parts so as to be convenient for measuring or processing the parts, the processing or measuring of the parts is accompanied with the whole process, so that the parts need to be frequently disassembled and assembled, workers usually fix the measuring or processing equipment on the parts through bolts by using existing holes on the parts, the measuring or processing equipment is disassembled after the measuring or processing is finished, when the parts need to be used again, the parts are installed through the bolts again, the time is delayed and the positions are difficult to keep consistent with the first installation due to the fact that the bolts are fixed again, and therefore the positioning accuracy is poor; the existing expansion bolt only has the large end part of the tail part of the bolt contacted with the hole, so that the expansion bolt can deflect in the radial direction, has poor positioning precision and can only be used for locking; the stud is only connected in the threaded hole, so the applicability is poor.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides an expansion stud. The positioning method is mainly used for solving the problem that the positioning precision is poor when the bolt or the expansion bolt is adopted to temporarily position the equipment in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention provides an expansion stud, which comprises a positioning connecting bolt, a positioning expansion bolt, an expansion sleeve and an expansion pipe, wherein the positioning expansion bolt is fixedly connected with the positioning connecting bolt; one ends, close to each other, of the positioning connecting bolts and the positioning expansion bolts are connected through threads; the other end of the positioning expansion bolt is provided with an expansion head; the middle part of the positioning connecting bolt is connected with the expansion sleeve; the expansion pipe is arranged between the expansion sleeve and the expansion head; the expansion pipe is sleeved on the positioning connecting bolt and the positioning expansion bolt; openings are formed in the two ends of the expansion pipe along the axis direction; the openings are uniformly arranged at intervals along the circumferential direction; the side surface of the expansion head close to one side of the expansion pipe is provided with a first conical surface; the side wall of one side of the expansion sleeve close to the expansion pipe is provided with a second conical surface; and the included angle between the generatrix on the first conical surface and the generatrix on the inner wall of the expansion pipe is larger than the included angle between the generatrix on the second conical surface and the generatrix on the inner wall of the expansion pipe.
When the expansion bolt works, firstly, the expansion bolt is pre-tightened manually, so that two ends of an expansion pipe respectively abut against an expansion sleeve and an expansion head, then, the expansion bolt is inserted into a hole on a large-scale part, then, a positioning connecting bolt is screwed by using a tool, because one end, close to each other, between the positioning connecting bolt and the positioning expansion bolt is in threaded connection, the distance between the expansion sleeve and the expansion head is gradually reduced, because a first conical surface is arranged on the expansion head, a second conical surface is arranged on the expansion sleeve, and because two ends of the expansion pipe are provided with openings, the two ends of the expansion pipe are gradually expanded through the first conical surface and the second conical surface, so that the two ends of the expansion pipe are expanded to fill the whole hole, and further, the expansion bolt is fixed in the hole, then, measuring or processing equipment is fixed on the expansion bolt, because the two ends of the expansion pipe both abut against the hole wall, the situation that the expansion stud deflects when being stressed radially when only one end of the expansion stud is abutted to the other end of the expansion stud to cause inaccurate positioning is avoided, and the positioning precision when the expansion stud is used for temporary positioning is improved; the whole expansion stud can be disassembled without disassembling the expansion stud only by disassembling the expansion stud from the expansion stud during the disassembling or the processing, so that the trouble of repeatedly disassembling and assembling the expansion stud during the reinstallation of the measurement or processing equipment is avoided; because the contained angle between the generating line on the circular conical surface and the generating line on the expand tube inner wall is greater than the contained angle between the generating line on the circular conical surface and the generating line on the expand tube inner wall, and then the resistance of the tight cover that expands to the expand tube is less than the resistance of the tight head to the expand tube, and then at the in-process that wrench movement positioning connecting bolt makes tight cover and the tight head of expanding be close to each other, the whole hole of bloated earlier with the expand tube one end of the tight cover contact that expands, and then guaranteed that the head of the expansion double-screw bolt is more stable apart from the drill way, and then avoid the head of the expansion double-screw bolt to stretch out the drill way overlength or stretch out the fruit and break and influence the location or the locking of measuring or processing equipment.
Preferably, the outer surface of the expansion head is uniformly provided with strip-shaped bulges at intervals along the circumferential direction; the height of the strip-shaped bulge is smaller than the wall thickness of the expansion pipe; the thickness of the strip-shaped bulge is smaller than or equal to the width of the opening.
During operation, through being provided with the protruding highly being less than the expand tube wall thickness of strip arch and the protruding arch of strip along the even interval of circumferencial direction on the surface of the tight head that expands, and then block in the opening through the protruding card of strip, and then prevent that the relative expand tube of the tight bolt of location bloated from taking place to rotate, and then guaranteed that location connecting bolt and location bloated tight bolt gradually twist the location connecting bolt and can take place to rotate relatively, and then guaranteed that the expand tube can be strutted smoothly.
Preferably, the expansion sleeve is rotatably connected with the positioning connecting bolt.
When the expansion bolt fixing device works, if the expansion sleeve is fixedly connected with the positioning connecting bolt, after the contact between the expansion pipe and the expansion sleeve, along with the deformation of the expansion pipe, the friction force between the expansion pipe and the expansion sleeve is increased, and the torque force for relative rotation between the expansion sleeve and the expansion pipe is increased, so that the installation of an expansion bolt is not facilitated, therefore, by rotationally connecting the expansion sleeve and the positioning connecting bolt, after the contact between the expansion pipe and the expansion sleeve, the friction force between the expansion pipe and the expansion sleeve is larger than the friction force between the expansion sleeve and the positioning connecting bolt, the expansion sleeve and the expansion pipe are relatively static, the expansion sleeve and the positioning connecting bolt rotate relatively, only the friction force between the expansion sleeve and the positioning connecting bolt exists at the moment, because the friction force between the expansion sleeve and the positioning connecting bolt is small, the rotation resistance is small, the required torque force is small, and the installation of the expansion bolt is facilitated, meanwhile, the relative rotation between the expanding tube and the hole wall is avoided, further, the damage to the hole wall is avoided, and further, the quality of the part is ensured.
Preferably, a rotating sleeve is arranged on one side, far away from the second conical surface, of the expansion sleeve; the rotating sleeve is made of plastic materials; the rotating sleeve is fixedly connected to the positioning connecting bolt; a gap is reserved between the expansion sleeve and the positioning connecting bolt; the surfaces of the rotating sleeve and the expansion sleeve, which are in contact with each other, are set as conical surfaces which are matched with each other; the rotating sleeve is rotatably connected with the expansion sleeve.
When the expansion connecting stud is in work, the rotating sleeve is arranged, so that the expansion sleeve and the positioning connecting stud are prevented from being abraded due to relative movement between the expansion sleeve and the positioning connecting stud, and the positioning accuracy of the expansion stud is further prevented from being influenced; because the rotating sleeve is made of plastic (the plastic material with self-lubrication can be selected, for example, polyamide which has the characteristics of wear resistance, self-lubrication, high surface hardness and the like) and the surfaces which are contacted with each other are matched conical surfaces, the hardness of the plastic is slightly lower than that of the metal, so that the slightly lower rotating sleeve can be self-adaptive to the shape of the harder expansion sleeve, and the plastic has self-lubrication, thereby reducing the wear, simultaneously reducing the resistance of relative movement between the expansion sleeve and the rotating sleeve, further facilitating the rotation between the expansion sleeve and the rotating sleeve and further facilitating the installation of the expansion stud; because the surfaces of the rotating sleeve and the expansion sleeve which are contacted with each other are conical surfaces which are matched with each other, the conical surfaces have good centering performance, so that the coincidence of the axis of the expansion stud and the axis of the hole is ensured, and the positioning precision of the expansion stud is improved.
Preferably, the expansion pipe is made of elastic materials.
When the expansion bolt is in operation, the expansion pipe is made of elastic materials, and the positioning connecting bolt is screwed through a tool when the expansion bolt is disassembled, so that the distance between the expansion sleeve and the expansion head is gradually increased, the expansion pipe is gradually rebounded under the action of the elasticity of the expansion pipe until the expansion sleeve is restored to the original shape, the disassembly of the expansion bolt is facilitated, and meanwhile, the damage to the inner wall of the hole during the disassembly is avoided; the expansion pipe can be restored to the original shape under the action of the elastic force of the expansion pipe, so that the expansion pipe can be repeatedly used, and the repeated use of the expansion stud is further realized; the elastic material of the expansion pipe can be elastic metal material, and also can be wear-resistant elastic plastic material (for example, UPE plastic, which has the characteristics of large elastic deformation, high wear resistance, good stress cracking resistance and the like).
Preferably, a reinforcing sleeve is arranged at the position where the positioning connecting bolt is in threaded connection with the positioning expansion bolt; one end of the reinforcing sleeve is sleeved on the positioning connecting bolt; the other end of the reinforcing sleeve is sleeved on the positioning expansion bolt; the expansion sleeve is in clearance fit with the positioning connecting bolt and the expansion sleeve is in clearance fit with the positioning expansion bolt.
When the expansion bolt is in work, the reinforcing sleeve is arranged at the position where the positioning connecting bolt is in threaded connection with the positioning expansion bolt, so that the strength of the threaded connection position of the positioning connecting bolt and the positioning expansion bolt is enhanced, and further the expansion bolt is prevented from being broken from the threaded connection position of the positioning connecting bolt and the positioning expansion bolt when the expansion bolt is subjected to radial force (the expansion sleeve is equivalent to a fulcrum when the expansion bolt is subjected to the radial force, so that the stress of the threaded connection position of the positioning connecting bolt and the positioning expansion bolt is increased, and the risk of breakage is increased), so that the service life of the expansion bolt is prolonged, and meanwhile, the stability of the expansion bolt caused by the radial force is improved; because the reinforcing sleeve is in order to strengthen the intensity of location connecting bolt and location tension bolt threaded connection department, needs relative motion between location connecting bolt and the location tension bolt, consequently needs reinforcing sleeve and location connecting bolt can relative motion between, and then can choose for use minimum clearance fit (the clearance fit that the clearance volume equals zero) among the clearance fit in order to satisfy the demand.
Preferably, a threaded rod is arranged on one side, close to the positioning expansion bolt, of the end face of the positioning connecting bolt; a threaded hole is formed in one side, close to the positioning connecting bolt, of the end face of the positioning expansion bolt; the threaded rod is matched with the threaded hole; the threaded rod is sleeved with an expansion sleeve; one end of the expansion sleeve is abutted against the end face of the positioning connecting bolt; the other end of the expansion sleeve props against the end face of the positioning expansion bolt; the middle part of the expansion sleeve is contacted with the inner wall of the reinforcing sleeve.
During operation, in order to avoid that the reinforcing sleeve in clearance fit with the positioning connecting bolt and the positioning expansion bolt is separated from the positioning connecting bolt or the positioning expansion bolt to cause the failure of the reinforcing sleeve in the process of installing the expansion stud, the distance between the end surfaces of the positioning connecting bolt and the positioning expansion bolt, which are close to each other, is gradually reduced after the threaded rod is screwed into the threaded hole when the expansion bolt is assembled, when the two ends of the expansion sleeve are contacted with the end surfaces of the positioning connecting bolt and the positioning expansion bolt, the expansion sleeve of the connecting bolt is continuously screwed to deform, and then the outer wall of the expansion sleeve is abutted against the inner wall of the reinforcing sleeve (at the moment, the deformation amount of the expansion sleeve just abutted against is small, and the expansion pipe is deformed), so that the positioning of the reinforcing sleeve is realized, and the failure condition of the reinforcing sleeve is avoided, when the expansion sleeve is installed, the distance between the positioning connecting bolt and the end face of the positioning expansion bolt, which is close to each other, is continuously reduced, and then the expansion sleeve continuously supports against the reinforcement sleeve, so that the condition that the reinforcement sleeve fails is further avoided.
Preferably, a positioning hole is formed in the end face of the other end of the positioning connecting bolt; and the positioning hole and the outer cylindrical surface at the other end of the positioning connecting bolt are both provided with a threaded section.
During operation, the thread section is arranged at the other end of the positioning connecting bolt, so that different internal threads or external threads can be selected and used according to different requirements, the application range of the expansion bolt is enlarged, and the applicability of the expansion bolt is improved.
The invention has the following beneficial effects:
1. when the expansion stud is used, the expansion stud is firstly manually pre-tightened to enable two ends of an expansion pipe to respectively abut against an expansion sleeve and an expansion head, then the expansion stud is inserted into a hole on a large-scale part, then a positioning connecting bolt is screwed by using a tool, because one end, close to each other, between the positioning connecting bolt and the positioning expansion bolt is in threaded connection, the distance between the expansion sleeve and the expansion head is gradually reduced, because a first conical surface is arranged on the expansion head, a second conical surface is arranged on the expansion sleeve, and because openings are arranged at two ends of the expansion pipe, two ends of the expansion pipe are gradually expanded and spread through the first conical surface and the second conical surface, so that the two ends of the expansion pipe are expanded and expanded to fill the whole hole, and the expansion stud is fixed in the hole, then measuring or processing equipment is fixed on the expansion stud, because two ends of the expansion pipe are abutted against the hole wall, the situation that the expansion stud deflects when being stressed radially when only one end of the expansion stud is abutted to the other end of the expansion stud to cause inaccurate positioning is avoided, and the positioning precision when the expansion stud is used for temporary positioning is improved; the whole expansion stud can be disassembled without disassembling the expansion stud only by disassembling the expansion stud from the expansion stud during the disassembling or the processing, so that the trouble of repeatedly disassembling and assembling the expansion stud during the reinstallation of the measurement or processing equipment is avoided; because the contained angle between the generating line on the circular conical surface and the generating line on the expand tube inner wall is greater than the contained angle between the generating line on the circular conical surface and the generating line on the expand tube inner wall, and then the resistance of the tight cover that expands to the expand tube is less than the resistance of the tight head to the expand tube, and then at the in-process that wrench movement positioning connecting bolt makes tight cover and the tight head of expanding be close to each other, the whole hole of bloated earlier with the expand tube one end of the tight cover contact that expands, and then guaranteed that the head of the expansion double-screw bolt is more stable apart from the drill way, and then avoid the head of the expansion double-screw bolt to stretch out the drill way overlength or stretch out the fruit and break and influence the location or the locking of measuring or processing equipment.
2. According to the invention, the strip-shaped bulges are uniformly arranged on the outer surface of the expansion head at intervals along the circumferential direction, and the heights of the strip-shaped bulges are smaller than the wall thickness of the expansion pipe, so that the strip-shaped bulges are clamped in the opening, the positioning expansion bolt is prevented from rotating relative to the expansion pipe, the positioning connecting bolt and the positioning expansion bolt are ensured to gradually rotate relative to each other when the positioning connecting bolt is screwed, and the expansion pipe is ensured to be smoothly expanded.
3. According to the invention, the expansion sleeve is rotatably connected with the positioning connecting bolt, after the expansion pipe is in contact with the expansion sleeve, when the friction force between the expansion pipe and the expansion sleeve is greater than the friction force between the expansion sleeve and the positioning connecting bolt, the expansion sleeve and the expansion pipe are relatively static, and the expansion sleeve and the positioning connecting bolt rotate relatively, only the friction force between the expansion sleeve and the positioning connecting bolt exists at the moment, and because the friction force between the expansion sleeve and the positioning connecting bolt is very small, the rotation resistance is small, the required torque is small, the installation of the expansion stud is convenient, the expansion pipe and the hole wall are prevented from rotating relatively, the hole wall is prevented from being damaged, and the quality of parts is ensured.
4. According to the invention, the rotating sleeve is arranged, so that the abrasion of the expansion sleeve and the positioning connecting stud caused by the relative motion between the expansion sleeve and the positioning connecting stud is avoided, and the influence on the positioning precision of the expansion stud is avoided; because the rotating sleeve is made of plastic (the plastic material with self-lubrication can be selected, for example, polyamide which has the characteristics of wear resistance, self-lubrication, high surface hardness and the like) and the surfaces which are contacted with each other are matched conical surfaces, the hardness of the plastic is slightly lower than that of the metal, so that the slightly lower rotating sleeve can be self-adaptive to the shape of the harder expansion sleeve, and the plastic has self-lubrication, thereby reducing the wear, simultaneously reducing the resistance of relative movement between the expansion sleeve and the rotating sleeve, further facilitating the rotation between the expansion sleeve and the rotating sleeve and further facilitating the installation of the expansion stud; because the surfaces of the rotating sleeve and the expansion sleeve which are contacted with each other are conical surfaces which are matched with each other, the conical surfaces have good centering performance, so that the coincidence of the axis of the expansion stud and the axis of the hole is ensured, and the positioning precision of the expansion stud is improved.
5. According to the invention, the expansion pipe is made of an elastic material, so that when the expansion stud is disassembled, the positioning connection stud is screwed by a tool, the distance between the expansion sleeve and the expansion head is gradually increased, the expansion pipe gradually rebounds under the action of the elasticity of the expansion pipe until the expansion pipe recovers to the original shape, the disassembly of the expansion stud is facilitated, and meanwhile, the damage to the inner wall of the hole during the disassembly is avoided; the expansion pipe can be restored to the original shape under the action of the elastic force of the expansion pipe, so that the expansion pipe can be repeatedly used, and the repeated use of the expansion stud is further realized; the elastic material of the expansion pipe can be elastic metal material, and also can be wear-resistant elastic plastic material (for example, UPE plastic, which has the characteristics of large elastic deformation, high wear resistance, good stress cracking resistance and the like).
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a schematic view of the overall construction of an expansion stud according to the present invention;
FIG. 2 is an exploded view of the expansion stud of the present invention;
FIG. 3 is a front view of the expansion stud of the present invention;
FIG. 4 is a schematic view of the positioning expansion bolt of the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 3 at A;
FIG. 6 is a partial enlarged view at B in FIG. 6;
FIG. 7 is a schematic view of the expansion stud securement of the present invention;
FIG. 8 is a schematic view of the present invention with the expansion tube being spread apart by the expansion head;
in the figure: the positioning connecting bolt comprises a positioning connecting bolt 1, a positioning expansion bolt 2, an expansion head 21, a first conical surface 211, a strip-shaped bulge 212, an expansion sleeve 3, a second conical surface 31, an expansion pipe 4, an opening 41, a rotating sleeve 5, a reinforcing sleeve 6, an expansion sleeve 7 and a thread section 8.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 8, an expansion stud comprises a positioning connecting bolt 1, a positioning expansion bolt 2, an expansion sleeve 3 and an expansion pipe 4; one ends, close to each other, of the positioning connecting bolt 1 and the positioning expansion bolt 2 are connected through threads; the other end of the positioning expansion bolt 2 is provided with an expansion head 21; the middle part of the positioning connecting bolt 1 is connected with the expansion sleeve 3; the expansion pipe 4 is arranged between the expansion sleeve 3 and the expansion head 21; the expansion pipe 4 is sleeved on the positioning connecting bolt 1 and the positioning expansion bolt 2; both ends of the expansion tube 4 are provided with openings 41 along the axial direction; the openings 41 are uniformly arranged at intervals along the circumferential direction; the side surface of the expansion head 21 close to one side of the expansion pipe 4 is provided with a first conical surface 211; the side wall of the expansion sleeve 3 close to one side of the expansion pipe 4 is provided with a second conical surface 31; the included angle between the generatrix on the first conical surface 211 and the generatrix on the inner wall of the expanding tube 4 is larger than the included angle between the generatrix on the second conical surface 31 and the generatrix on the inner wall of the expanding tube 4.
During operation, when using the expansion double-screw bolt, at first manually carry out pretension to the expansion double-screw bolt, make 4 both ends of expand tube respectively with expand tight cover 3 with expand tight head 21 conflict, insert the expansion double-screw bolt downthehole on the large-scale part afterwards, use instrument to twist location connecting bolt 1 immediately, because threaded connection is passed through to location connecting bolt 1 and the one end that the location expands to be close to each other between tight bolt 2, and then make the expansion cover 3 and expand and tightly reduce apart from between the head 21 gradually, because set up a circle on the head 21 that expandsThe expansion sleeve 3 is provided with a second conical surface 31, openings 41 are formed in two ends of the expansion pipe 4, the two ends of the expansion pipe 4 are gradually expanded and spread through the first conical surface 211 and the second conical surface 31, the two ends of the expansion pipe 4 are expanded and spread, the whole hole is filled with the two ends of the expansion pipe 4, an expansion stud is fixed in the hole, measuring or processing equipment is fixed on the expansion stud, the two ends of the expansion pipe 4 are abutted against the hole wall, the situation that the expansion stud deflects when stressed in the radial direction when only one end of the expansion stud is abutted is avoided, and accordingly positioning accuracy when the expansion stud is used for temporary positioning is improved; the whole expansion stud can be disassembled without disassembling the expansion stud only by disassembling the expansion stud from the expansion stud during the disassembling or the processing, so that the trouble of repeatedly disassembling and assembling the expansion stud during the reinstallation of the measurement or processing equipment is avoided; by making an included angle (marked as alpha, 0) between a generatrix on the first conical surface 211 and the axis of the positioning expansion bolt 2<α<90 degrees is set to be larger than the included angle (marked as beta, 0) between the generatrix on the second conical surface 31 and the axis of the positioning connecting bolt 1<β<90 degrees), and then the end of the expansion tube 4 contacting the expansion sleeve 3 is firstly propped open and abutted against the hole side wall, and then the end of the expansion tube 4 contacting the expansion head 21 is propped open and abutted against the hole side wall (the stress analysis between the expansion tube 4 and the expansion sleeve 3 and between the expansion tube 4 and the expansion head 21 is shown in fig. 8, so that the propped force of the expansion tube 4 is marked as F1Cos α and F2Cos β because of α>β, thus F1>F2) And further, the head of the expansion stud is prevented from generating large deviation (unevenness) from the position of the orifice, and further the influence on the locking of the measuring or processing equipment is avoided. Because the contained angle between the generating line on conical surface 211 and the generating line on the inner wall of expand tube 4 is greater than the contained angle between the generating line on conical surface 31 and the generating line on the inner wall of expand tube 4, and then the resistance of the expansion sleeve 3 to the expand tube 4 is less than the resistance of the expansion head 21 to the expand tube 4, and then in the process that the expansion sleeve 3 and the expansion head 21 are close to each other by twisting the positioning connecting bolt 1, the whole hole is expanded with the expansion 4 one end of the expand tube in contact with the expansion sleeve 3 first, and then the distance between the head of the expansion stud and the orifice is relatively stable, and further the head of the expansion stud is prevented from extending out of the orifice too long or extending out of the broken end to influence the measurementOr positioning or locking of the processing equipment.
As shown in fig. 1, 4 and 8, the outer surface of the expansion head 21 is provided with strip-shaped protrusions 212 at regular intervals along the circumferential direction; the height of the strip-shaped bulge 212 is smaller than the wall thickness of the expansion tube 4; the thickness of the strip-shaped protrusion 212 is smaller than or equal to the width of the opening 41.
During operation, through being provided with the protruding height that strip arch 212 and strip arch 212 are less than 4 wall thickness of expand tube along the even interval of circumferencial direction on the surface of bloated tight head 21, and then block in opening 41 through strip arch 212, and then prevent that location tensioning bolt 2 from taking place to rotate relatively expand tube 4, and then guaranteed that location connecting bolt 1 can take place to rotate relatively with location tensioning bolt 2 screwing location connecting bolt 1 gradually, and then guaranteed that expand tube 4 can be strutted smoothly.
The expansion sleeve 3 is rotatably connected with the positioning connecting bolt 1.
When the expansion sleeve is in work, if the expansion sleeve 3 is fixedly connected with the positioning connecting bolt 1, after the expansion pipe 4 is in contact with the expansion sleeve 3, along with the deformation of the expansion pipe 4, the friction force between the expansion pipe 4 and the expansion sleeve 3 is increased, and further the torque force for relative rotation between the expansion sleeve 3 and the expansion pipe 4 is increased, so that the installation of an expansion stud is not facilitated, therefore, through the rotary connection between the expansion sleeve 3 and the positioning connecting bolt 1, after the expansion pipe 4 is in contact with the expansion sleeve 3, the friction force between the expansion pipe 4 and the expansion sleeve 3 is larger than the friction force between the expansion sleeve 3 and the positioning connecting bolt 1, the expansion sleeve 3 and the expansion pipe 4 are relatively static, the expansion sleeve 3 and the positioning connecting bolt 1 relatively rotate, only the friction force between the expansion sleeve 3 and the positioning connecting bolt 1 exists at the moment, and the friction force between the expansion sleeve 3 and the positioning connecting bolt 1 is very small, and then the rotation resistance is little, and then the torsion that needs is little, and then the installation of the expansion double-screw bolt of being convenient for, has avoided taking place relative rotation between expand tube 4 and the pore wall simultaneously, and then has avoided causing the destruction to the pore wall, and then has guaranteed the quality of part.
As shown in fig. 3, 5 and 7, a rotating sleeve 5 is arranged on one side of the expansion sleeve 3 away from the second conical surface 31; the rotating sleeve 5 is made of plastic materials; the rotating sleeve 5 is fixedly connected to the positioning connecting bolt 1; a gap is reserved between the expansion sleeve 3 and the positioning connecting bolt 1; the surfaces of the rotating sleeve 5 and the expansion sleeve 3 which are contacted with each other are set as mutually matched conical surfaces 51; the rotating sleeve 5 is rotatably connected with the expansion sleeve 3.
When the expansion connecting stud and the expansion sleeve are in work, the rotating sleeve 5 is arranged, so that the expansion sleeve 3 and the positioning connecting stud are prevented from being abraded due to relative movement between the expansion sleeve 3 and the positioning connecting stud, and the positioning accuracy of the expansion stud is prevented from being influenced; because the rotating sleeve 5 is made of plastic (for example, polyamide with self-lubricating property and high surface hardness can be selected), and the surfaces in contact with each other are matched conical surfaces 51, the hardness of the plastic is slightly lower than that of metal, so that the slightly lower rotating sleeve 5 can be self-adapted to the shape of the harder expansion sleeve 3, and the plastic has self-lubricating property, thereby reducing the abrasion, simultaneously reducing the resistance of the relative movement between the expansion sleeve 3 and the rotating sleeve 5, further facilitating the rotation between the expansion sleeve 3 and the rotating sleeve 5 and further facilitating the installation of the expansion stud; because the surfaces of the rotating sleeve 5 and the expansion sleeve 3 which are contacted with each other are mutually matched conical surfaces 51, the conical surfaces 51 have good centering performance, so that the coincidence of the axis of the expansion stud and the axis of the hole is favorably ensured, and the positioning precision of the expansion stud is improved.
The expansion tube 4 is made of elastic materials.
When the expansion bolt dismounting device works, the expansion pipe 4 is made of elastic materials, and the connecting bolt is screwed and positioned by a tool when the expansion bolt is dismounted, so that the distance between the expansion sleeve 3 and the expansion head 21 is gradually increased, the expansion pipe 4 is gradually rebounded under the action of the elastic force of the expansion pipe 4 until the expansion sleeve is restored to the original state, the dismounting of the expansion bolt is facilitated, and meanwhile, the damage to the inner wall of the hole during the dismounting is avoided; the expansion pipe 4 can be restored to the original shape under the action of the elastic force, so that the expansion pipe 4 can be repeatedly used, and the repeated use of the expansion stud is further realized; the elastic material of the expansion tube 4 can be elastic metal material, and also can be wear-resistant elastic plastic material (for example, UPE plastic, which has the characteristics of large elastic deformation, high wear resistance, good stress cracking resistance and the like).
As shown in fig. 1, 3, 6 and 7, a reinforcing sleeve 6 is arranged at the position where the positioning connecting bolt 1 is in threaded connection with the positioning expansion bolt 2; one end of the reinforcing sleeve 6 is sleeved on the positioning connecting bolt 1; the other end of the reinforcing sleeve 6 is sleeved on the positioning expansion bolt 2; the expansion sleeve 3 is in clearance fit with the positioning connecting bolt 1 and the expansion sleeve 3 is in clearance fit with the positioning expansion bolt 2.
When the expansion bolt is in work, the reinforcing sleeve 6 is arranged at the position where the positioning connecting bolt 1 is in threaded connection with the positioning expansion bolt 2, so that the strength of the threaded connection position of the positioning connecting bolt 1 and the positioning expansion bolt 2 is enhanced, and the expansion bolt is prevented from being broken from the threaded connection position of the positioning connecting bolt 1 and the positioning expansion bolt 2 when the expansion bolt is subjected to radial force (the expansion sleeve 3 is equivalent to a fulcrum when the expansion bolt is subjected to the radial force, so that the stress of the threaded connection position of the positioning connecting bolt 1 and the positioning expansion bolt 2 is increased, and the risk of breakage is increased), so that the service life of the expansion bolt is prolonged, and meanwhile, the stability of the expansion bolt subjected to the radial force is improved; because the reinforcement sleeve 6 is in order to strengthen the intensity of the threaded connection department of the positioning connecting bolt 1 and the positioning expansion bolt 2, the positioning connecting bolt 1 and the positioning expansion bolt 2 need relative motion, so the reinforcement sleeve 6 and the positioning connecting bolt 1 need relative motion, and then the minimum clearance fit (clearance fit with the clearance amount equal to zero) in the clearance fit can be selected for use to satisfy the demand.
As shown in fig. 1, 3, 6 and 7, a threaded rod is arranged on one side of the end face of the positioning connecting bolt 1, which is close to the positioning expansion bolt 2; a threaded hole is formed in one side, close to the positioning connecting bolt 1, of the end face of the positioning expansion bolt 2; the threaded rod is matched with the threaded hole; the threaded rod is sleeved with an expansion sleeve 7; one end of the expansion sleeve 7 is abutted against the end face of the positioning connecting bolt 1; the other end of the expansion sleeve 7 is abutted against the end face of the positioning expansion bolt 2; the middle part of the expansion sleeve 7 is in contact with the inner wall of the reinforcing sleeve 6.
In operation, in order to avoid that the reinforcing sleeve 6 in clearance fit with the positioning connecting bolt 1 and the positioning expansion bolt 2 is separated from the positioning connecting bolt 1 or the positioning expansion bolt 2 to cause failure of the strength of the thread connection of the reinforcing sleeve 6, the expansion sleeve 7 is arranged between the positioning connecting bolt 1 and the positioning expansion bolt 2, when the expansion bolt is assembled, after the threaded rod is screwed into the threaded hole, the distance between the end surfaces of the positioning connecting bolt 1 and the positioning expansion bolt 2, which are close to each other, is gradually reduced, when the two ends of the expansion sleeve 7 are contacted with the end surfaces of the positioning connecting bolt 1 and the positioning expansion bolt 2, the expansion sleeve 7 is continuously screwed to deform, and then the outer wall of the expansion sleeve 7 is abutted against the inner wall of the reinforcing sleeve 6 (at the moment, the deformation of the expansion sleeve 7 is small, and the expansion pipe 4 is deformed), so as to realize the positioning of the reinforcing sleeve 6, and then avoid the condition that uide efficacy appears in reinforcement sleeve 6, the terminal surface distance that positioning connection bolt 1 and positioning tension bolt 2 are close to each other when installation continues to reduce, and then expansion sleeve 7 continues to support tight reinforcement sleeve 6, has further avoided the condition that uide efficacy appears in reinforcement sleeve 6.
As shown in fig. 1, 3 and 7, a positioning hole is arranged on the end face of the other end of the positioning connecting bolt 1; and the positioning hole and the outer cylindrical surface at the other end of the positioning connecting bolt 1 are both provided with a thread section 8.
During operation, the other end of the positioning connecting bolt 1 is provided with the thread section 8, so that different internal threads or external threads can be selected and used according to different requirements, the application range of the expansion bolt is enlarged, and the applicability of the expansion bolt is improved.
When the expansion stud is used, firstly, the expansion stud is pre-tightened manually, so that two ends of an expansion pipe 4 are respectively abutted against an expansion sleeve 3 and an expansion head 21, at the moment, the outer wall of an expansion sleeve 7 is abutted against the inner wall of a reinforcing sleeve 6, further, the reinforcing sleeve 6 is positioned, then, the expansion stud is inserted into a hole in a large-sized part, next, a positioning connecting bolt 1 is screwed by using a tool, because one end, close to each other, of the positioning connecting bolt 1 and one end, close to the positioning expansion bolt 2 are connected through threads, further, the distance between the expansion sleeve 3 and the expansion head 21 is gradually reduced, because a first conical surface 211 is arranged on the expansion head 21, a second conical surface 31 is arranged on the expansion sleeve 3, because two ends of the expansion pipe 4 are provided with openings 41, further, two ends of the expansion pipe 4 are gradually expanded and unfolded through the first conical surface 211 and the second conical surface 31, further, two ends of the expansion pipe 4 are abutted against the hole wall, the expansion stud is fixed in the hole, and then the measuring or processing equipment is fixed on the expansion stud, because two ends of the expansion tube 4 are abutted against the hole wall, the situation that the positioning is not accurate due to deflection when the expansion stud is radially stressed when only one end of the expansion stud is abutted is avoided, and the positioning precision when the expansion stud is used for temporary positioning is improved; the whole expansion stud can be disassembled without disassembling the expansion stud only by disassembling the expansion stud from the expansion stud during the disassembling or the processing, so that the trouble of repeatedly disassembling and assembling the expansion stud during the reinstallation of the measurement or processing equipment is avoided; because the contained angle between the generating line on conical surface 211 and the generating line on the inner wall of expand tube 4 is greater than the contained angle between the generating line on conical surface 31 and the generating line on the inner wall of expand tube 4, and then the resistance of the tight cover 3 to expand tube 4 is less than the resistance of the tight head 21 to expand tube 4, and then in the process of twisting positioning connecting bolt 1 making the tight cover 3 and the tight head 21 of expanding be close to each other, the whole hole is full of earlier to expand with the 4 one end of expand tube that the tight cover 3 contacted that expands, and then guaranteed that the head of the expansion stud is more stable apart from the drill way, and then avoid the head of the expansion stud to stretch out the overlength drill way or stretch out the fruit and break and influence the location or the locking of measuring or processing equipment.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. An expansion stud, characterized by: comprises a positioning connecting bolt (1), a positioning expansion bolt (2), an expansion sleeve (3) and an expansion pipe (4); one ends, close to each other, of the positioning connecting bolts (1) and the positioning expansion bolts (2) are connected through threads; the other end of the positioning expansion bolt (2) is provided with an expansion head (21); the middle part of the positioning connecting bolt (1) is connected with the expansion sleeve (3); the expansion pipe (4) is arranged between the expansion sleeve (3) and the expansion head (21); the expansion pipe (4) is sleeved on the positioning connecting bolt (1) and the positioning expansion bolt (2); both ends of the expansion pipe (4) are provided with openings (41) along the axial direction; the openings (41) are uniformly arranged at intervals along the circumferential direction; the side surface of the expansion head (21) close to one side of the expansion pipe (4) is provided with a first conical surface (211); the side wall of the expansion sleeve (3) close to one side of the expansion pipe (4) is provided with a second conical surface (31); the included angle between the generatrix on the first conical surface (211) and the generatrix on the inner wall of the expanding tube (4) is larger than the included angle between the generatrix on the second conical surface (31) and the generatrix on the inner wall of the expanding tube (4).
2. The expansion stud according to claim 1, characterized in that: strip-shaped bulges (212) are uniformly arranged on the outer surface of the expansion head (21) at intervals along the circumferential direction; the height of the strip-shaped bulge (212) is smaller than the wall thickness of the expansion pipe (4); the thickness of the strip-shaped protrusion (212) is smaller than or equal to the width of the opening (41).
3. An expansion stud according to claim 2, characterised in that: the expansion sleeve (3) is rotatably connected with the positioning connecting bolt (1).
4. An expansion stud according to claim 3, characterised in that: a rotating sleeve (5) is arranged on one side, far away from the second conical surface (31), of the expansion sleeve (3); the rotating sleeve (5) is made of plastic materials; the rotating sleeve (5) is fixedly connected to the positioning connecting bolt (1); a gap is reserved between the expansion sleeve (3) and the positioning connecting bolt (1); the surfaces of the rotating sleeve (5) and the expansion sleeve (3) which are contacted with each other are set as mutually matched conical surfaces (51); the rotating sleeve (5) is rotationally connected with the expansion sleeve (3).
5. An expansion stud according to claim 4, characterised in that: the expansion pipe (4) is made of elastic materials.
6. An expansion stud according to claim 5, characterised in that: a reinforcing sleeve (6) is arranged at the position where the positioning connecting bolt (1) is in threaded connection with the positioning expansion bolt (2); one end of the reinforcing sleeve (6) is sleeved on the positioning connecting bolt (1); the other end of the reinforcing sleeve (6) is sleeved on the positioning expansion bolt (2); the expansion sleeve (3) is in clearance fit with the positioning connecting bolt (1) and the expansion sleeve (3) is in clearance fit with the positioning expansion bolt (2).
7. An expansion stud according to claim 6, characterised in that: a threaded rod is arranged on one side, close to the positioning expansion bolt (2), of the end face of the positioning connecting bolt (1); a threaded hole is formed in one side, close to the positioning connecting bolt (1), of the end face of the positioning expansion bolt (2); the threaded rod is matched with the threaded hole; the threaded rod is sleeved with an expansion sleeve (7); one end of the expansion sleeve (7) is abutted against the end face of the positioning connecting bolt (1); the other end of the expansion sleeve (7) is abutted against the end face of the positioning expansion bolt (2); the middle part of the expansion sleeve (7) is contacted with the inner wall of the reinforcing sleeve (6).
8. An expansion stud according to claim 7, characterised in that: a positioning hole is formed in the end face of the other end of the positioning connecting bolt (1); and the positioning hole and the outer cylindrical surface at the other end of the positioning connecting bolt (1) are both provided with a thread section (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210074101.8A CN114458672B (en) | 2022-01-21 | 2022-01-21 | Expansion stud |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210074101.8A CN114458672B (en) | 2022-01-21 | 2022-01-21 | Expansion stud |
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| Publication Number | Publication Date |
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| CN114458672A true CN114458672A (en) | 2022-05-10 |
| CN114458672B CN114458672B (en) | 2024-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210074101.8A Active CN114458672B (en) | 2022-01-21 | 2022-01-21 | Expansion stud |
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| Country | Link |
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| CN (1) | CN114458672B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114941644A (en) * | 2022-06-02 | 2022-08-26 | 浙江山力得新材料科技有限公司 | Grabbing type expansion piece |
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| CN215214293U (en) * | 2021-01-14 | 2021-12-17 | 江苏屾盛特种合金有限公司 | Stud combined structure |
| CN215444683U (en) * | 2021-08-02 | 2022-01-07 | 武汉金诚嘉科技有限公司 | A anti-skidding inflation screw for installation of outdoor 5G communication equipment |
| CN215487072U (en) * | 2021-06-12 | 2022-01-11 | 余姚法思德五金有限公司 | Two-way fastening type expansion screw of concrete road overlap joint |
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|---|---|---|---|---|
| CN2403938Y (en) * | 1999-08-07 | 2000-11-01 | 曹现强 | Expansion bolt |
| CN2524000Y (en) * | 2002-02-09 | 2002-12-04 | 张泽荣 | Double-headed expension bolts |
| CN2714873Y (en) * | 2004-06-28 | 2005-08-03 | 李珊 | Biconic eccentric expansion bolt assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114941644A (en) * | 2022-06-02 | 2022-08-26 | 浙江山力得新材料科技有限公司 | Grabbing type expansion piece |
| CN114941644B (en) * | 2022-06-02 | 2023-10-10 | 浙江山力得新材料科技有限公司 | Grabbing type expansion piece |
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|---|---|
| CN114458672B (en) | 2024-04-30 |
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Effective date of registration: 20240402 Address after: 334000 Jiangxi Haiwei Fasteners Co., Ltd., Lutian Industrial Park, Poyang County, Shangrao City, Jiangxi Province Applicant after: Jiangxi Haiwei Intelligent Equipment Co.,Ltd. Country or region after: China Address before: 237000 in the hospital of shenjiazui Shuyu Ceramics Co., Ltd., mahekou office, Chengguan Town, Shucheng County, Lu'an City, Anhui Province Applicant before: Shucheng Jiaheng Magnetic Industry Co.,Ltd. Country or region before: China |
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