CN2570513Y - A check-and-balance expandable expansion screw - Google Patents

Abstract

The utility model discloses a scalable inflation screw of balanced type, including expansion sleeve, inflation nut, screw rod. The expansion sleeve is formed by connecting a front sleeve and a rear sleeve; the screw rod comprises a driving screw rod and a traction screw rod, the rod part of the driving screw rod is provided with a braking mechanism, and a supporting spring is arranged between the braking mechanism and the head part of the screw rod; the head of the traction screw is provided with a groove, an adjusting spring is arranged between the head of the screw and the balance-type supporting block of the front end sleeve, the rod part of the screw is provided with a slip-preventing mechanism, the tail part of the screw is provided with threads, and an expansion nut is screwed at the tail part of the screw. The utility model not only has the convenience of the traditional expansion screw in use, but also can be used to fix door and window products made of various materials and other quilt and fixture, and can overcome the defect that the traditional expansion screw can not self-extend and adjust.

Description

A check-and-balance expandable expansion screw

Technical field

The utility model relates to an expansion screw.

Background technique

The structure of traditional expansion screws is roughly as shown in FIG. 1 , including an expansion sleeve 1 , a driving screw 2 and an expansion nut 3 . When applying, firstly position the item to be fixed and the main body, and then, at the predetermined position, use a drilling tool to drill a small hole with the same length and diameter as the expansion screw, and the user can properly Use a hammer to drive the expansion screw vertically into the pre-drilled hole, and make it completely in contact with the plane of the fixed object, and then use a screwdriver that matches the groove shape of the screw head, Quickly turn the head of the screw in a clockwise direction, so that it pulls the expansion nut below and climbs up continuously along the thread on the screw, so as to expand the expansion pages on the related expansion screw sleeves to fix the doors and windows Or the purpose of the object being fixed. But because the length of the casing of this kind of expansion screw and the relevant screw rod are all fixed and can't carry out traction blending, so when the ambient temperature of the item fixed by it changes, due to "cold shrinkage" "principle to generate internal gravity, so that the relevant fixed object produces a self-shrinking tension deformation, and the relevant internal gravity is blocked by the expansion screw that plays a fixing role and cannot be pulled and adjusted by itself in time, the relevant fixed object The connection points of the horizontal and vertical structures of the fixtures will be torn and broken, and at the same time, the structure of the entire group of items will be severely damaged. In addition to affecting the daily life of relevant users, it also brings significant economic losses to them.

Utility model content

The purpose of this utility model is to provide a check and balance type telescopic expansion screw, which not only inherits the simplicity of the traditional expansion screw in use, but also can be used to fix doors and windows made of various materials and other products. The object to be fixed, and can overcome the defects that traditional expansion screws cannot self-expand and adjust.

The check and balance telescopic expansion screw provided by the utility model includes an expansion sleeve, an expansion nut, and a screw rod. The expansion sleeve is composed of two parts connected by a front sleeve and a rear sleeve. A check-and-balance support block is respectively stamped at relevant positions; the screw includes a drive screw and a traction screw, wherein the drive screw is composed of a head, a rod and a tail, and the rod of the screw has a braking mechanism. A support spring is arranged between the mechanism and the head of the screw, and the tail of the screw is equilateral polygonal; the traction screw is composed of a head, a rod and a tail, and the head of the screw has a groove, and the groove shape of the groove is consistent with the drive The equilateral polygon at the end of the screw matches. An adjustment spring is provided between the head of the screw and the counterbalance support block of the front casing. The tail of the screw has threads, and the expansion nut is screwed on the tail of the screw. When in application, use a screwdriver to rotate the drive screw, the drive screw rotates and drives the traction screw to rotate at the same time, the traction screw can pull the expansion nut at the tail along the thread on the traction screw, and continuously climb up to the predetermined position, thereby expanding the relevant The expansion sheet on the expansion sleeve achieves the purpose of fixing doors, windows or objects to be fixed.

The braking mechanism of the driving screw rod part described in the utility model can be a brake buckle, and the brake buckle is inserted in a pit pattern provided on the surface of the screw rod part; it can also be a brake pin, The brake pin is inserted in the socket provided on the screw rod part. The support spring is used in conjunction with the brake mechanism to fix the drive screw in the sleeve in the form of a support. In addition, it also allows the drive screw to move back and forth freely in a given space when needed.

The anti-slip mechanism of the rod part of the traction screw described in the utility model can be an anti-slip buckle, which is inserted into a pit pattern on the surface of the rod part of the screw rod and is closely attached to the back end of the casing. On the balance type support block; also can be a small step prefabricated in the middle of the bar, the small step is close to the balance type support block of the rear casing. The anti-slip mechanism can enable the traction screw to be supported at the check-and-balance support block of the rear casing to prevent the traction screw from being forced to slide forward due to the reverse traction of the expansion nut when the traction expansion nut is being expanded, so that the traction Screw rod is pressed to death earlier as the adjusting spring of supporting draw screw rod to reserve.

The utility model divides the casing of the related expansion screw into two parts and connects them with a set of separate screw rods after modification. When assembling, a set of strong support springs and adjustment springs are respectively combined on the screw rods and then arranged on the screw rods. In the casing of the expansion screw, when the object to be fixed is physically contracted due to the cold shrinkage effect caused by the drop in ambient temperature, the front casing of the expansion screw is affected by the external force and synchronized with the fixed object was pulled outward. At the same time, after the occurrence of the cold shrinkage phenomenon, when the extrapolation caused by the thermal expansion effect begins, the strong spring that was originally contracted in the expansion screw due to cold shrinkage and extrusion, with the help of the items fixed by it The external thrust generated by thermal expansion pushes the expansion screw back to the original set position, preventing fracture and deformation at the junction of the fixed object and destroying the application function of the entire group of objects.

Compared with the traditional expansion screw, the utility model can not only inherit the basic function of the traditional expansion screw to fix related items, but also can reduce the phenomenon of strong external gravitational force generated by the cold shrinkage effect of the related fixed object, preventing The fracture and deformation of the joints of the fixed objects will destroy the application function of the whole group of objects, so as to avoid the movement and adjustment of the gaps of the installed and in-use doors and windows or related fixed objects because of their structure. Combined to cause damage to related items, it is necessary to remove walls and bricks to replace new doors and windows. Through related improvements, it not only brings a lot of convenience to users during construction, but also avoids unnecessary troubles. At the same time, it also greatly reduces and reduces the possibility of additional economic burden that users will need to repair and replace in the future. sex.

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is a structural schematic diagram of a traditional expansion screw;

Fig. 2 is the structural representation of the utility model;

Fig. 3 is the structural representation of embodiment 1 of the braking mechanism of the driving screw described in the utility model;

Fig. 4 is the schematic structural view of embodiment 2 of the brake mechanism of the drive screw described in the present invention;

Fig. 5 is a structural schematic diagram of embodiment 1 of the anti-slip mechanism of the traction screw described in the present invention;

Fig. 6 is a schematic structural view of Embodiment 2 of the anti-slip mechanism of the traction screw described in the present invention;

Fig. 7 is a structural schematic diagram of the supporting spring described in the utility model;

Fig. 8 is a schematic diagram of the connection form of the front sleeve and the rear sleeve of the present invention;

Figure 9 is a schematic diagram of a traditional expansion screw being vertically plugged into a pre-drilled hole with the same diameter and depth, and making it completely in contact with the plane of the fixed object;

Figure 10 is a schematic diagram of the utility model being driven into a pre-drilled hole with the same diameter and depth by a vertical plug, and making it completely in contact with the plane of the fixed object;

Figure 11 is a longitudinal sectional view of a traditional expansion screw in use;

Figure 12 is a longitudinal sectional view of the utility model in use;

Fig. 13 is a cross-sectional view of a traditional expansion screw in use when the cold shrinkage effect occurs;

Figure 14 is a cross-sectional view of the utility model in use when the cold shrinkage effect occurs;

Fig. 15 is a cross-sectional view of the utility model when it is extrapolated due to the thermal expansion effect after the cold shrinkage phenomenon occurs.

Detailed ways

As shown in Figure 2, the utility model check-and-balance telescopic expansion screw includes an expansion sleeve, an expansion nut, and a screw rod. The expansion sleeve is composed of a front sleeve 1 and a rear sleeve 2, and the front sleeve 1 and the rear sleeve 2 are respectively stamped with a check and balance support block 3, 4 at the relevant positions. Screw rod comprises drive screw rod 5 and pull screw rod 6, and wherein drive screw rod 5 is made up of head 51, rod part 52 and tail part 53, and screw rod rod part 52 has a brake mechanism, is provided with a support between brake mechanism and screw rod head 51. Spring 7, screw rod tail part 53 is equilateral polygon; Traction screw rod 6 is made up of head 61, rod part 62 and tail part 63, and screw rod head 61 has a groove, and the groove shape of groove and drive screw rod tail part 53 equilateral The polygonal shape matches, and an adjustment spring 8 is provided between the screw head 61 and the counterbalance support block 3 of the front end casing 1, and a support pad 14 is provided at the contact between the counterbalance support block 3 and the adjustment spring 8, and the screw rod part 62 An anti-slip mechanism is arranged at the check-and-balance support block 4 of the rear casing 2 , the screw tail 63 has threads, and the expansion nut 9 is screwed on the screw tail 63 .

The braking mechanism of the utility model driving the screw rod part 52 can be a brake buckle 10, and the brake buckle 10 is inserted and embedded in a pit pattern 11 located on the surface of the screw rod part 52, as shown in Figure 3; It may be a brake pin 12, and the brake pin 12 is inserted into the insertion hole 13 provided on the screw rod portion 52, as shown in FIG. 4 .

The anti-slip mechanism of the traction screw rod of the utility model can be an anti-slip buckle 15, which is inserted and embedded in a groove 16 on the surface of the screw rod 62 and is closely attached to the rear end casing 2. On the check-and-balance support block 4, as shown in Figures 2 and 5; it can also be a small step 17 prefabricated in the middle of the rod part 62, and the small step 17 is padded with a flat washer 18 to be close to the check and balance of the rear casing 2 Type support block 4, as shown in Figure 2,6.

The supporting spring 7 of the utility model is a regressive double-tail strong supporting spring, and the return hook type can be positively returned and hidden in the casing, as shown in Figure 7 .

The connection between the front end casing 1 and the rear end casing 2 of the utility model has various forms, as shown in Figure 8, of course, the combination of more than two sections of casing can be adopted according to the difference in required length.

As shown in Figure 9, the traditional expansion screw is plugged vertically into a pre-drilled hole with the same diameter and depth, and makes it completely in contact with the plane of the fixed object. At this time, the expansion sheet part is not expanded at all; and all the springs embedded in the expansion screw are not squeezed because of no external force. The expansion part in the expansion screw, which is used to expand the expansion page on the casing, remains vertically outside the lower end of the casing.

As shown in Figure 10, the utility model is punched into a pre-drilled hole with the same diameter and depth by a vertical plug, and makes it completely contact with the plane of the fixed object properly. At this time, the expansion page part is not expanded at all; and all the springs embedded in the utility model are not squeezed because of no external force. The expansion part that is used to stretch the expansion page on the sleeve pipe in the expansion screw remains vertically outside the lower end of the sleeve pipe.

As shown in Figure 11, driven by an independent screw, the traditional expansion screw pulls the expansion nut below to climb upwards along the thread on the screw. After completing its predetermined stroke, it also simultaneously completes the expansion of the casing. expansion page. At the same time, the relevant casing has also been firmly expanded in the brick wall, and the fixed object is firmly fixed, and the entire expansion process is completed here.

As shown in Figure 12, under the rapid clockwise rotation of the drive screw, the traction screw of the present invention pulls the expansion nut below to climb continuously along the thread on the screw, and after completing its predetermined stroke, it also Simultaneously finish expanding the expansion pages on the sleeve. At the same time, the relevant casing has also been firmly expanded in the brick wall, and the fixed object is firmly fixed, and the entire expansion process is completed here. And the spring assembly related to the utility model continues to maintain the original shape and length because it is not subjected to any compression.

As shown in Figure 13, at the beginning of shrinkage of the fixed object due to the cold shrinkage effect, the traditional expansion screw cannot move smoothly by itself, resulting in forced tearing at the connection point between the horizontal and vertical structures of the fixed object. The phenomenon of cracking and breaking, and at the same time causing serious damage to the structure of the entire group of objects.

As shown in Figure 14, when the shrinkage begins due to the occurrence of cold shrinkage, the utility model adopts a check-and-balance retractable movable sleeve design, so that when it is affected by an external force, the front end can be moved smoothly. It is pulled out synchronously with the fixed object; and the (L) millimeter long strong spring that is pre-assembled in the middle part of the utility model is also squeezed synchronously and shrinks into (LL _a ) millimeter. In this way, the (L _a ) millimeter space that is shrunk due to being pulled becomes the relevant adjustment gap, thereby ensuring that the utility model has sufficient scalability, and prevents the fixed object from being exposed to cold in the surrounding environment. When affected by the shrinkage effect and pulled by an external force, the expansion screw that plays a fixed role cannot move, causing the fracture of the fixed object to occur again.

As shown in Figure 15, after the occurrence of the cold shrinkage phenomenon, when the extrapolation caused by the thermal expansion effect begins, the utility model is pushed out synchronously with the fixed object under the influence of an external force. The cold-shrinking extrusion and the contracted strong spring, with the help of the external thrust generated by the heat expansion of the relevant fixed object, push the utility model back to the original position, and the utility model The expansion nut at the rear end is not affected at all, and it still firmly pushes the expansion page outwards, continuing to function as a secure item.

Claims (8)

1, the scalable setscrew of a kind of containing formula, comprise expansion sleeve, expanding nut, screw rod, it is characterized in that: described expansion sleeve is connected to form by front end sleeve pipe (1) and rear end sleeve pipe (2) two-part, front end sleeve pipe (1) and rear end sleeve pipe (2) at the relevant position place respectively punching press one containing formula support block (3,4) is arranged; Described screw rod comprises drive screw (5) and traction screw (6), wherein drive screw (5) is made up of head (51), bar portion (52) and afterbody (53), described screw rod bar portion (52) has an arrestment mechanism, be provided with a supported spring (7) between arrestment mechanism and the screw head (51), screw rod tail (53) is an equilateral polygon shape; Traction screw (6) is made up of head (61), bar portion (62) and afterbody (63), described screw head (61) has a groove, the equilateral polygon shape of the flute profile of groove and drive screw afterbody (53) matches, be provided with a Regulation spring (8) between the containing formula support block (3) of screw head (61) and front end sleeve pipe (1), screw rod bar portion (62) locates to be provided with a limited-slip mechanism at the containing formula support block (4) that it is positioned at rear end sleeve pipe (2), screw rod tail (63) has screw thread, and expanding nut (9) is screwed in screw rod tail (63).

2, the scalable setscrew of containing formula according to claim 1, it is characterized in that: the arrestment mechanism of described drive screw bar portion (52) is a braking clasp (10), and braking clasp (10) is inserted and is embedded in the hole line (11) of being located at screw rod bar portion (52) surface.

3, the scalable setscrew of containing formula according to claim 1 is characterized in that: the arrestment mechanism of described drive screw bar portion (52) is a braking latch pin (12), and braking latch pin (12) is inserted in the jack (13) of being located at screw rod bar portion (52).

4, the scalable setscrew of containing formula according to claim 1 is characterized in that: the containing formula support block (3) of described front end sleeve pipe (1) is provided with a lip block (14) with the contacting point of Regulation spring (8).

5, the scalable setscrew of containing formula according to claim 1 is characterized in that: described supported spring (7) is the powerful supported spring of the two tails of recurrence type.

6, the scalable setscrew of containing formula according to claim 1, it is characterized in that: the limited-slip mechanism of described traction screw bar portion (62) is an on-slip clasp (15), and on-slip clasp (15) is inserted and to be embedded in the hole line (16) of being located at screw rod bar portion (62) surface and to be close on the containing formula support block (4) of rear end sleeve pipe (2).

7, the scalable setscrew of containing formula according to claim 1, it is characterized in that: the limited-slip mechanism of described traction screw bar portion (62) is a small stair (17) in the middle of the bar portion (62) in advance, and small stair (17) is close on the containing formula support block (4) of rear end sleeve pipe (2).

8, the scalable setscrew of containing formula according to claim 7 is characterized in that: be provided with a plain washer (18) between the containing formula support block (4) of described small stair (17) and rear end sleeve pipe (2).

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