Bolt pre-tightening mechanism

Abstract

The utility model relates to the technical field of sewer sealing kits, in particular to a bolt pre-tightening mechanism which comprises a pressing piece, a plurality of pre-tightening assemblies are arranged on the middle periphery of the pressing piece in a central symmetry mode, each pre-tightening assembly comprises two clamping jaws and a pressing jaw, the two clamping jaws are transversely arranged in a spaced mode, and the pressing jaw is arranged on the middle periphery of the pressing piece. A gap between the two clamping jaws forms a pre-tightening gap matched with the outline of a bolt, the outer side end of the pre-tightening gap is of an opening structure, the pressing jaws are located over the pre-tightening gap, the pressing jaws and the clamping jaws are arranged at intervals in the longitudinal direction, the bolt is detachably arranged in the pre-tightening gap, and a nut of the bolt is clamped between the clamping jaws and the pressing jaws. A screw rod of the bolt penetrates through the pre-tightening gap and then is connected with a nut, and the pre-tightening assembly forms a limiting pre-tightening structure of the bolt through the clamping jaw and the pressing jaw. The utility model is favorable for solving the problem of difficulty in field assembly caused by limited bolt mounting position and narrow working space of some existing launching suites.

Description

Technical Field

[0001] The utility model relates to the technical field of a water sealing kit, in particular to a bolt pre-tightening mechanism used for installing a water sealing kit. Background Art

[0002] Common drainage kits refer to drainage devices installed in bathtubs, washbasin drains, etc.

[0003] Most drainage kits on the market are composed of downpipes, corrugated pipes, straight pipes, overflow elbows and trapezoidal rubber rings. The connection between the downpipe and bathtubs and other products often needs to be sealed and waterproofed by a sealing ring. In many cases, the sealing ring is locked and fixed by a bolt-coordinated pressure plate installation method. The specific structure is generally to set multiple corresponding holes on the pressure plate and bathtubs and other products. The bolts pass through the holes and engage with nuts to connect and lock. When locking, one hand is required to fix the bolts and the other hand to turn the nuts. The applicant found that in this method, since the hole structure has been processed before leaving the factory and the hole spacing is fixed, in actual installation, the bathroom space is often small, and the drainage position of bathtubs and other products is hidden and the space is narrow, which makes the operation of this fixed installation position difficult. Utility Model Content

[0004] The utility model provides a bolt pre-tightening mechanism, which is conducive to solving the problem that some existing launching kits are difficult to assemble on site due to limited bolt installation positions and narrow working space.

[0005] The utility model is achieved in this way:

[0006] A bolt pre-tightening mechanism comprises a pressing plate, wherein a central hole adapted to an external sewer pipe fitting is provided in the middle of the pressing plate, and a plurality of pre-tightening components are centrally symmetrically arranged on the outer periphery of the central hole of the pressing plate, and each of the pre-tightening components comprises two claws and a pressure claw, the inner ends of the claws and the pressure claw are respectively connected to the edge of the pressing plate, and the outer ends of the claws and the pressure claw are both free points, the two claws are arranged at intervals in the horizontal direction, and the gap between the two claws constitutes a pre-tightening gap adapted to the bolt profile, the outer end of the pre-tightening gap is an open structure, the pressure claw is located directly above the pre-tightening gap, and the pressure claw and the claw are arranged at intervals in the longitudinal direction, a bolt is detachably arranged in the pre-tightening gap, the nut of the bolt is clamped between the claw and the pressure claw, and the screw rod of the bolt is connected with a nut after passing through the pre-tightening gap, and the pre-tightening component forms a limited pre-tightening structure of the bolt through the claws and the pressure claw.

[0007] On the basis of the above technical solution, the inner ends of the clamping claw and the pressing claw are fixedly connected to the outer edge of the pressing sheet.

[0008] On the basis of the above technical solution, the pressing sheet is a shuttle-shaped plate structure, the pressing claw is arranged flush with the pressing sheet, the clamping claw and the pressing sheet are arranged longitudinally staggered, and the connection between the clamping claw and the pressing sheet forms a folding structure.

[0009] On the basis of the above technical solution, the claw is provided with a chamfered portion at the corner of the outer end of the pre-tightening gap, and the chamfered portion enables the opening end of the pre-tightening gap to form a "V"-shaped opening structure.

[0010] On the basis of the above technical solution, a prism is provided near the nut on the screw rod of the bolt, and a locking end face is provided on the prism. When the nut is clamped between the claw and the pressure claw, the prism passes through the pre-tightening gap and the locking end face can be fitted with the inner contour of the claw on one side close to the pre-tightening gap.

[0011] On the basis of the above technical solution, the pressing plate, the clamping claw and the pressing claw are an integrated sheet metal structure.

[0012] On the basis of the above technical solution, the upper end surface of the claw is provided with anti-slip grooves.

[0013] On the basis of the above technical solution, the anti-slip grooves are a plurality of linear flange structures, and the anti-slip grooves are arranged perpendicularly to the opening entry and exit direction of the pre-tightening gap.

[0014] Based on the above technical solution, a sealing ring is arranged on one side of the pressing plate close to the bolt locking direction.

[0015] On the basis of the above technical solution, the sealing ring is detachably connected to the pressing sheet, and a limiting groove adapted to the contour of the sealing ring is provided on one side of the pressing sheet connected to the sealing ring.

[0016] Compared with the prior art, the utility model has at least the following advantages:

[0017] The utility model forms a pre-tightening assembly of the bolt by arranging two claws and a pressure claw which are arranged in a group on the pressing plate, and a pre-tightening gap is formed between the two claws, which can allow the screw rod of the bolt to enter and exit and flexibly displace laterally along the path of the pre-tightening gap, and the pressure claw can cooperate with the claws to form an axial limit constraint on the nut on the bolt. Therefore, the pre-tightening assembly can realize pre-tightening assembly on one side of the nut of the bolt before installation. This structure makes the tightening operation between the bolt and the nut more convenient and efficient, and increases the fault tolerance rate of component connection, and can blindly lock the bolt according to different hole spacings. This is beneficial for on-site assembly in a narrow space, and there is no need for the traditional complicated locking operation method of fixing the nut with one hand and tightening the bolt with the other hand. In other words, it is beneficial to solve the problem that some existing launching kits are difficult to assemble on-site due to the limited bolt installation position and narrow working space. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 is a schematic diagram of a three-dimensional structure of a bolt pre-tightening mechanism in one embodiment;

[0020] Figure 2 for Figure 1 Schematic diagram of the explosion structure;

[0021] Figure 3 for Figure 2 Schematic diagram of the structure of the medium-pressure tablet;

[0022] Figure 4 It is a schematic diagram of a partial structure of a nut in an installed state in one embodiment;

[0023] Figure 5 A schematic diagram of a partial structure of an anti-slip pattern in another embodiment;

[0024] Figure 6 Schematic diagram of the structure of the limit groove in one embodiment.

[0025] Markings in the figure: 1. Pressing plate; 11. Limiting groove; 2. Center hole; 3. Clamping claw; 31. Chamfered portion; 32. Anti-slip pattern; 4. Pre-tightening gap; 5. Pressing claw; 6. Bolt; 61. Nut; 62. Prism; 7. Nut; 8. Gasket; 9. Sealing ring. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the utility model.

[0027] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to an element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0029] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Example 1: Combination Figure 1-4 The present embodiment discloses a bolt pre-tightening mechanism, which is used to pre-tighten the bolts 6 of the locking seal ring 9 before assembly when installing the launching kit, so as to improve the installation efficiency and reduce the difficulty of operation.

[0031] Specifically, the bolt pre-tightening mechanism includes a pressing piece 1 of a shuttle-shaped sheet metal plate structure, and the long side direction of the pressing piece 1 is defined as the left-right direction, and the short side direction is the front-back direction. In this embodiment, a central hole 2 adapted to the external sewer pipe fitting is provided in the middle of the pressing piece 1. When in use, the pressing piece 1 is sleeved on the sewer pipe fitting using the central hole 2. The left and right sides of the pressing piece 1 are narrow side profiles, and a pre-tightening component is provided at each narrow side profile. The positions of the two pre-tightening components are centrally symmetrical with respect to the central hole 2, which provides a basic condition for providing a stable and balanced connection position for subsequent locking installation.

[0032] Each of the pre-tightening components includes two claws 3 and a pressure claw 5, respectively. The inner ends of the claws 3 and the pressure claw 5 are respectively connected to the edge of the pressing plate 1, and the outer ends of the claws 3 and the pressure claw 5 are free points. In this embodiment, the pressing plate 1, the claws 3 and the pressure claw 5 are an integrated sheet metal structure, the pressure claw 5 is flush with the pressing plate 1, the claws 3 and the pressing plate 1 are longitudinally staggered, and the connection between the claws 3 and the pressing plate 1 forms a folding structure. In other embodiments, the claws 3 and the pressure claw 5 can also be connected to the pressing plate 1 by welding, bolt 6 locking, buckling, etc., and the specific connection method can be selected and implemented according to the actual structure.

[0033] Further, combined with Figure 3As shown, the two claws 3 are arranged laterally at intervals, and the gap between the two claws 3 constitutes a pre-tightening gap 4 that adapts to the contour of the bolt 6. The pre-tightening gap 4 is a horizontal linear slot structure oriented left and right, and the outer end of the pre-tightening gap 4 is an opening structure, which facilitates the entry and exit of the nut 61 of the bolt 6. In this embodiment, in order to make the entry and exit of the nut 61 in the pre-tightening gap 4 more convenient, the claw 3 is provided with a chamfered portion 31 at the corner of the outer end of the pre-tightening gap 4, and the chamfered portion 31 makes the open end of the pre-tightening gap 4 form a "V"-shaped opening structure.

[0034] Furthermore, the pressure claw 5 is located directly above the pre-tightening gap 4, and the pressure claw 5 is spaced apart from the clamping claw 3 in the longitudinal direction. Since the pressing sheet 1, the clamping claw 3 and the pressure claw 5 in this embodiment are sheet metal structures, the structure of the pressure claw 5 corresponds to the contour of the pre-tightening gap 4. The specific pressure claw 5 is a rod structure facing left and right. Since its inner end is a connecting fixed end and the outer end is a free end, the pressure claw 5 itself has a certain elastic deformation ability, which makes the pressure claw 5 be subjected to the longitudinal upward (relative to the longitudinal upward) of the nut 61 when the nut 7 of the bolt 6 is inserted horizontally therein. Figure 1 The pressing claw 5 generates a corresponding reaction force, which exerts a longitudinal downward force (relative to the position in the figure) on the nut 61. Figure 1 The holding force (in terms of the positional relationship in the middle) causes the nut 61 to be relatively tightly clamped between the pressing claw 5 and the clamping claw 3. In this state, the longitudinal direction of the bolt 6 is limited and constrained, achieving a first pre-tightening relationship.

[0035] It should be noted that, combined with Figure 2 and Figure 4 A prism 62 is provided on the screw rod of the bolt 6 near the nut 61, and four mutually perpendicular clamping end faces are provided on the prism 62, that is, the prism 62 in this embodiment is a quadrilateral column structure. When the nut 61 is clamped between the claw 3 and the pressure claw 5, the prism 62 passes through the pre-tightening gap 4 and the clamping end face can be arranged in a fit with the inner contour of the claw 3 on one side close to the pre-tightening gap 4. This structure restricts the axial rotation activity of the bolt 6 after the bolt 6 is horizontally inserted into the pre-tightening gap 4, and a second pre-tightening relationship is achieved, which is beneficial for the subsequent need to hold one side of the fixed nut 61 by hand when tightening the nut 7, making the locking operation of the nut 7 more convenient and efficient, and also conducive to the installation operation of the launching sealing kit in a narrow space. In other embodiments, the locking end face cooperates with the inner wall gap of the pre-tightening gap 4. When the prism 62 is axially rotated by a certain angle, the locking end face and the inner wall of the pre-tightening gap 4 are in contact with each other, which ensures that the bolt 6 can slide in and out of the pre-tightening gap 4 for flexible position adjustment.

[0036] refer to Figure 4A bolt 6 is detachably provided in the pre-tightening gap 4, and a nut 61 of the bolt 6 is clamped between the claw 3 and the pressure claw 5. The screw rod of the bolt 6 passes through the pre-tightening gap 4 and is connected with a nut 7, thereby realizing the locking installation of the pressing piece 1 with the reserved installation hole on the bathtub and other products. In actual use, a sealing ring 9 is provided on the side of the pressing piece 1 close to the locking direction of the bolt 6, that is, a sealing ring 9 is provided in the gap between the pressing piece 1 and the bathtub and other products, so as to achieve a sealing effect on the gap at the connection by squeezing the sealing ring 9 after installation. The pre-tightening component forms a limiting pre-tightening structure of the bolt 6 through the claw 3 and the pressure claw 5.

[0037] In order to make the locking of the nut 7 more stable and reliable, a matching gasket 8 is provided at the inner end of the nut 7.

[0038] Example 2: Based on Example 1, Figure 5 As shown, in this embodiment, the top end surface of the pressing claw 5 is provided with an anti-slip groove 32 to prevent the nut 61 from sliding relative to the clamping claw 3 and affecting the installation position during the tightening of the nut 7.

[0039] Furthermore, the anti-slip grooves 32 are a plurality of linear flange structures, and the anti-slip grooves 32 are arranged perpendicularly to the opening entry and exit direction of the pre-tightening gap 4 .

[0040] Embodiment 3: Based on Embodiment 1, Figure 6 As shown, in order to effectively control the assembly position of the sealing ring 9 after locking, its position can remain relatively stable within a certain threshold range to reduce the occurrence of poor sealing effect caused by assembly misalignment, a limiting groove 11 adapted to the contour of the sealing ring 9 is provided on the side of the pressing piece 1 connected to the sealing ring 9. The limiting groove 11 is an annular recessed groove structure. During installation, the pressing piece 1 abuts and presses the sealing ring 9, and the limiting groove 11 can effectively restrain the radial deviation of the sealing ring 9.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bolt pre-tightening mechanism, characterized in that: The invention comprises a pressing plate (1), wherein a central hole (2) adapted to an external water pipe fitting is provided in the middle of the pressing plate (1), and a plurality of pre-tightening components are centrally symmetrically arranged on the outer periphery of the central hole (2) of the pressing plate (1), and each of the pre-tightening components comprises two clamping claws (3) and a pressing claw (5), wherein the inner ends of the clamping claws (3) and the pressing claw (5) are respectively connected to the edge of the pressing plate (1), and the outer ends of the clamping claws (3) and the pressing claw (5) are both free points, and the two clamping claws (3) are arranged at intervals in the transverse direction, and the gap between the two clamping claws (3) constitutes a profile adapted to a bolt (6). A pre-tightening gap (4) is provided, wherein the outer end of the pre-tightening gap (4) is an open structure, the pressing claw (5) is located directly above the pre-tightening gap (4), and the pressing claw (5) and the clamping claw (3) are spaced apart in the longitudinal direction, a bolt (6) is detachably provided in the pre-tightening gap (4), a nut (61) of the bolt (6) is clamped between the clamping claw (3) and the pressing claw (5), and a screw rod of the bolt (6) is connected with a nut (7) after passing through the pre-tightening gap (4), and the pre-tightening assembly forms a limited pre-tightening structure of the bolt (6) through the clamping claw (3) and the pressing claw (5).

2. A bolt pre-tightening mechanism according to claim 1, characterized in that: The inner ends of the clamping claw (3) and the pressing claw (5) are fixedly connected to the outer edge of the pressing sheet (1).

3. A bolt pre-tightening mechanism according to claim 2, characterized in that: The pressing sheet (1) is a shuttle-shaped plate structure, the pressing claw (5) is arranged flush with the pressing sheet (1), the clamping claw (3) and the pressing sheet (1) are arranged longitudinally offset, and the connection between the clamping claw (3) and the pressing sheet (1) forms a folding structure.

4. A bolt pre-tightening mechanism according to claim 3, characterized in that: The claw (3) is provided with a chamfered portion (31) at the corner of the outer end of the pre-tightening gap (4), and the chamfered portion (31) enables the opening end of the pre-tightening gap (4) to form a "V"-shaped opening structure.

5. A bolt pre-tightening mechanism according to claim 1, characterized in that: A prism (62) is provided near the nut (61) of the screw rod of the bolt (6), and a locking end face is provided on the prism (62). When the nut (61) is locked between the clamping claw (3) and the pressing claw (5), the prism (62) passes through the pre-tightening gap (4) and the locking end face can be arranged to fit with the inner contour of the clamping claw (3) on one side near the pre-tightening gap (4).

6. A bolt pre-tightening mechanism according to claim 2, characterized in that: The pressing plate (1), the clamping claw (3) and the pressing claw (5) are an integrated sheet metal structure.

7. A bolt pre-tightening mechanism according to claim 1, characterized in that: The upper end surface of the clamping claw (3) is provided with anti-slip grooves (32).

8. A bolt pre-tightening mechanism according to claim 7, characterized in that: The anti-slip grooves (32) are a plurality of linear flange structures, and the anti-slip grooves (32) are arranged perpendicularly to the opening in and out direction of the pre-tightening gap (4).

9. The bolt pre-tightening mechanism according to claim 1, characterized in that: A sealing ring (9) is arranged on one side of the pressing plate (1) close to the locking direction of the bolt (6).

10. A bolt pre-tightening mechanism according to claim 9, characterized in that: The sealing ring (9) and the pressing sheet (1) are detachably connected, and a limiting groove (11) adapted to the contour of the sealing ring (9) is provided on one side of the pressing sheet (1) connected to the sealing ring (9).

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