Anti-loosening pressing structure of UPS (Uninterrupted Power Supply) wiring terminal

Abstract

The utility model provides an anti-loosening pressing structure of a UPS (Uninterrupted Power Supply) wiring terminal, and relates to the technical field of uninterrupted power supplies. An anti-loosening pressing structure of a UPS power supply wiring terminal comprises a terminal base, the terminal base is provided with a stepped pressing bolt, the stepped pressing bolt comprises a threaded section and a wire pressing section, the threaded section is fixed on the terminal base, the wire pressing section is arranged below the threaded section, a wire pressing groove is formed in the wire pressing section, and the threaded section is fixed on the terminal base. The wire pressing groove is used for accommodating a cable; a positioning piece is arranged in the cable pressing groove, and the cable is limited and fixed in the cable pressing groove by the positioning piece; and an elastic pressing assembly is arranged between the stepped pressing bolt and the terminal base. According to the utility model, the terminal pedestal provides mechanical support and a conductive path, the threaded hole and the bolt form a main electric contact surface, and the stepped compression bolt realizes integration of threaded connection and power supply wiring crimping, thereby ensuring that the power supply wiring terminal compression structure is not easy to loosen and is convenient to maintain.

Description

TECHNICAL FIELD

[0001] The utility model relates to uninterrupted power supply technology field especially relates to a UPS power supply wiring terminal anti -loosening pressure structure. BACKGROUND

[0002] As the key power guarantee equipment, the reliability of the wiring terminal of UPS (uninterruptible power supply) directly influences the stability of the power supply system. The traditional UPS power supply wiring terminal adopts bolt pressure connection structure, but in actual application, especially under the conditions of vibration, temperature change and large current, the following technical defects exist generally:

[0003] The thread loosening caused by vibration, due to the stress relaxation of ordinary spring washers under continuous dynamic load, and the lack of effective self-locking mechanism between the thread pair. The difference in linear expansion coefficient between the copper conductor and the steel bolt will produce a gap displacement of 0.05-0.15mm in the working temperature range of 40-120℃; the existing technology uses single disc spring compensation, but its stiffness curve cannot match the nonlinear thermal deformation. When the multi-stranded twisted wire is pressure connected, the traditional flat gasket structure will make 30%-50% of the wire core escape to the outside (microscopic observation result), resulting in a decrease of more than 40% in effective contact area.

[0004] At present, it is urgent to develop a terminal pressure connection structure integrated with anti-loosening, anti-vibration, self-adaptive thermal compensation and convenient maintenance. INVENTION CONTENTS

[0005] The utility model provides a UPS power supply wiring terminal anti-loosening pressure structure, through the stepped pressure connection bolt, the power line is connected to the terminal base, and the elastic pressure connection piece is arranged between the stepped pressure connection bolt and the terminal base, the technical problem of easy loosening and inconvenient maintenance of the existing power supply wiring terminal pressure connection structure is improved.

[0006] A UPS power supply wiring terminal anti-loosening pressure structure, comprising a terminal base, a stepped pressure connection bolt is arranged on the terminal base, the stepped pressure connection bolt comprises a threaded section and a wire pressure section, the threaded section is fixed on the terminal base, the wire pressure section is arranged below the threaded section, and a wire pressure groove is formed in the wire pressure section, the wire pressure groove is used for accommodating the cable; a positioning piece is arranged in the wire pressure groove, and the cable is limited and fixed in the wire pressure groove by the positioning piece; an elastic pressure connection assembly is arranged between the stepped pressure connection bolt and the terminal base.

[0007] The utility model discloses a step type compression bolt is set up, will connect power cord to terminal base, and set up elastic compression spare between step type compression bolt and terminal base, guarantee that terminal compression structure is not easy to come off, open the wire groove on step type compression bolt, utilize the limiting piece and press into the wire groove with power cord terminal, and the circuit is communicated through the contact of power cord terminal and step type compression bolt.

[0008] Further, the elastic compression assembly comprises a disc spring piece group and a locking washer, and the disc spring piece group and the locking washer are coaxially sleeved at one end of the threaded segment close to the wire compression segment.

[0009] Further, an annular boss is arranged between the threaded segment and the wire compression segment, the boss is threadedly connected with the threaded segment, one side of the boss close to the threaded segment is provided with an annular groove, and the size of the annular groove is matched with the locking washer.

[0010] The threaded segment is screwed on the terminal base, the boss is screwed, the elastic compression piece is extruded and limited between the terminal base and the boss, vibration and thermal deformation are dynamically compensated by the disc spring piece group and the locking washer, and the contact force between the step type compression bolt and the terminal base is kept stable.

[0011] Further, the disc spring piece group comprises at least two spring piece pairs of different stiffnesses which are oppositely stacked.

[0012] Further, the disc spring piece group comprises a first spring piece, a second spring piece and a third spring piece, the first spring piece and the third spring piece are oppositely concave, and the second spring piece is arranged between the first spring piece and the third spring piece and oppositely concave to the first spring piece.

[0013] The first spring piece, the second spring piece and the third spring piece are two disc spring pieces made of manganese steel, stainless steel and phosphor bronze respectively, three pieces of different stiffnesses are combined, the manganese steel piece is a main force layer, provides a basic compression force and controls high-temperature expansion, the stainless steel piece is a high-temperature stable layer, suppresses creep, and the phosphor bronze piece is a buffer vibration absorption layer, preferentially deforms to compensate for low-temperature shrinkage and compensate for micro-displacement. Opposite installation makes stress distribution uniform.

[0014] Further, one end of the wire groove away from the threaded segment is an open end, an axial groove is arranged in the wire groove, radial protrusions are arranged on the limiting piece, and the radial protrusions are interference-fitted with the axial groove.

[0015] The power connection terminal is inserted into the wire pressing groove from the open end and is dispersed in the axial groove, thereby multi-directionally constraining the cable, preventing the wire core from being dispersed and improving the utilization rate of the wire core section after crimping. The radial protrusions on the limiting member are embedded in the axial groove to form an interference fit, thereby fixing the wire core dispersed in the axial groove in the axial groove and forming a stable circuit path.

[0016] Further, a groove is formed at the top of the limiting member body, and a lifting head is arranged at the top of the limiting member.

[0017] The limiting member body is in interference fit with the wire pressing groove, the groove formed at the top of the limiting member reduces the bearing area of the limiting member and can disperse stress, and the lifting head facilitates disassembly of the limiting member.

[0018] Further, the threaded section is provided with an anti-loosening thread at one end close to the elastic pressing assembly, and the thread of the anti-loosening thread is a discontinuous thread.

[0019] The anti-loosening thread is a nylon insert, and the thread of the anti-loosening thread is segmented and missing in the circumferential direction to form intermittent engagement, and the discontinuous thread breaks the vibration conduction path, so that loosening needs to overcome the friction of multiple independent contact surfaces at the same time.

[0020] Further, a rubber protective sleeve is arranged outside the wire pressing section, the rubber protective sleeve is in a U-shaped structure, and a through hole is formed at the bottom of the U-shaped structure.

[0021] The power connection terminal is inserted into the rubber protective sleeve from the through hole, and after crimping of the power connection terminal is completed, the rubber protective sleeve is sleeved on the wire pressing section as insulation protection.

[0022] Advantages of the utility model

[0023] 1. The utility model provides mechanical support and conductive path through the terminal base, the threaded hole and the bolt form a main electrical contact surface, the stepped pressing bolt realizes thread connection and cable crimping integration, and the crimping operation can be completed by single tightening, thereby effectively shortening the installation time and facilitating maintenance; the elastic pressing assembly dynamically compensates vibration and thermal deformation, maintains constant contact pressure, ensures that the power connection terminal pressing structure is not easy to loosen and is convenient to maintain.

[0024] 2. The non-linear stiffness of the disc spring sheet group provides continuous pressing force, the pressure fluctuation is obviously reduced in a vibration environment, and the locking washer forms an anti-loosening mechanism; the intermittent structure of the thread breaks the vibration conduction path, effectively reduces the loosening probability, and the interference fit between the radial protrusions and the axial groove produces mechanical self-locking, thereby effectively improving the anti-torsional moment. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The figure is a structural schematic diagram of the utility model;

[0026] Figure 2 It is a partial sectional view of the utility model;

[0027] Figure 3 It is a schematic view of the limiting piece structure of the utility model;

[0028] Reference signs: 1-terminal base, 2-threaded section, 3-wire pressing section, 4- boss, 5-limiting piece, 6-first spring piece, 7-second spring piece, 8-third spring piece, 9-locking washer, 10-groove, 11-lifting head, 12-threaded hole, 13-loose thread prevention, 14-open end, 15-wire pressing groove, 16-axial groove, 17-radial convex tooth. DETAILED DESCRIPTION

[0029] Example 1

[0030] As Figures 1-2 shown, a loose prevention and pressing structure of a UPS power supply terminal includes a terminal base 1, the terminal base 1 is provided with a stepped pressing bolt, the stepped pressing bolt includes a threaded section 2 and a wire pressing section 3, the threaded section 2 is fixed on the terminal base 1, the wire pressing section 3 is placed below the threaded section 2, and the wire pressing section 3 is provided with a wire pressing groove 15, the wire pressing groove 15 is used for accommodating a cable; the wire pressing groove 15 is provided with a limiting piece, the cable is limited and fixed in the wire pressing groove 15 by the limiting piece; an elastic pressing assembly is arranged between the stepped pressing bolt and the terminal base 1.

[0031] The utility model discloses a stepped pressing bolt, and an elastic pressing piece is arranged between the stepped pressing bolt and the terminal base 1, so that the terminal pressing structure is not easy to loosen; the wire pressing groove 15 is arranged on the stepped pressing bolt, the power supply wire terminal is pressed into the wire pressing groove 15 by the limiting piece 5, and the circuit is connected by the contact between the power supply wire terminal and the stepped pressing bolt. The terminal base 1 is made of C11000 copper material, and the stepped pressing bolt is made of SCM435 alloy steel.

[0032] In use, the elastic pressing assembly is installed between the threaded section 2 and the terminal base 1, the threaded section 2 is threadedly connected with the terminal base 1, the power supply terminal is inserted into the wire pressing groove 15, and the cable is limited and fixed in the wire pressing groove 15 by the limiting piece. The utility model provides mechanical support and conductive path by the terminal base 1, the threaded hole 12 and the bolt form a main electrical contact surface, the stepped pressing bolt realizes the integration of threaded connection and cable pressing, and the pressing operation can be completed by single tightening, so that the installation time is effectively shortened; the elastic pressing assembly dynamically compensates vibration and thermal deformation, and maintains constant contact pressure.

[0033] Example 2

[0034] Based on example 1,Figure 1 As shown, the elastic compression assembly includes a disc spring set and a locking washer 9, which are coaxially sleeved on one end of the threaded segment 2 close to the crimping segment 3. An annular boss 4 is arranged between the threaded segment 2 and the crimping segment 3, which is threadedly connected with the threaded segment 2. The boss 4 is provided with an annular groove on the side close to the threaded segment 2, and the size of the annular groove is matched with the locking washer 9. The disc spring set includes at least two spring pieces of different stiffness which are oppositely stacked. The disc spring set includes a first spring piece 6, a second spring piece 7 and a third spring piece 8. The first spring piece 6 and the third spring piece 8 are oppositely concave, and the second spring piece 7 is arranged between the first spring piece 6 and the third spring piece 8 and oppositely concave to the first spring piece 6.

[0035] The first spring piece 6 is made of 65Mn steel, the second spring piece 7 is made of 316 stainless steel, and the third spring piece 8 is made of C5191 phosphor bronze. The first spring piece 6 and the third spring piece 8 are oppositely concave, and the second spring piece 7 is arranged between the first spring piece 6 and the third spring piece 8 and oppositely concave to the first spring piece 6. The annular boss 4 is threadedly connected between the threaded segment 2 and the crimping segment 3. When the threaded segment 2 is tightened with the terminal base 1, the boss 4 is screwed, the disc spring set is limited between the terminal base 1 and the boss 4, dynamically compensates vibration and thermal deformation, and maintains constant contact pressure. The boss 4 is provided with an annular groove on the side close to the threaded segment 2, and the groove depth of the annular groove is smaller than the diameter of the locking washer 9. The locking washer 9 is limited in the annular groove, which ensures the stability of the locking washer 9 and prevents creep.

[0036] In use, the locking washer 9 and the disc spring set are sequentially installed on the threaded segment 2. One side of the locking washer 9 is pressed into the annular groove on the side of the boss 4. The threaded segment 2 is threadedly screwed with the threaded hole 12 of the terminal base 1. The disc spring set and the locking washer 9 are limited between the terminal base 1 and the boss 4. The power supply terminal is inserted into the crimping groove 15, and the cable is limited and fixed in the crimping groove 15 by the positioning member.

[0037] Example 3

[0038] Based on Example 1, as shown in Figure 2 , Figure 3 The end of the crimping groove 15 away from the threaded segment 2 is an open end 14. The crimping groove 15 is provided with an axial groove 16. The limiting member 5 is provided with a radial protruding tooth 17 which is interference-fitted with the axial groove 16. The body of the limiting member 5 is provided with a groove 10 on the top. The limiting member 5 is provided with a lifting head 11 on the top. The body of the limiting member 5 is interference-fitted with the crimping groove 15.

[0039] The power terminals are inserted from the open end 14 into the wire crimping groove 15 and dispersed within the axial groove 16, thus constraining the cable in multiple directions. The radial protrusions 17 on the limiting member 5 are inserted into the axial groove 16 to form an interference fit, fixing the wire cores dispersed within the axial groove 16 and forming a stable circuit path. The body of the limiting member 5 is interference-fitted with the opening of the wire crimping groove 15, and the lifting head 11 facilitates the disassembly of the limiting member 5.

[0040] In use, an elastic clamping assembly is installed between the threaded section 2 and the terminal base 1 to tightly connect the threaded section 2 to the threaded hole 12 of the terminal base 1. The power terminal is inserted from the open end 14 into the wire groove 15 and dispersed in the axial groove 16. The positioning member restricts and fixes the cable in the wire groove 15. The radial protrusion 17 on the limiting member 5 is embedded in the axial groove 16 and forms an interference fit with the axial groove 16, fixing the wire core dispersed in the axial groove 16. At the same time, the body of the limiting member 5 is embedded in the opening of the wire groove 15 and forms an interference fit with the opening of the wire groove 15. When disassembly is required, the lifting head 11 is pulled up to separate the body of the limiting member 5 from the opening of the wire groove 15, the radial protrusion 17, and the axial groove 16.

[0041] Example 4

[0042] Based on Example 1, such as Figure 2 As shown, the threaded section 2 is provided with an anti-loosening thread 13 at one end near the elastic clamping assembly, and the thread teeth of the anti-loosening thread 13 are discontinuous threads.

[0043] The anti-loosening thread 13 is a nylon insert. The threads of the anti-loosening thread 13 are segmented and missing in the circumferential direction, forming an intermittent engagement. In use, the anti-loosening thread 13 is intermittently installed at the end of the threaded segment 2 away from the terminal base 1. An elastic clamping component is installed between the threaded segment 2 and the terminal base 1. When the threaded segment 2 is threaded into the threaded hole 12 of the terminal base 1, the anti-loosening thread 13 is engaged by the threaded hole 12 in the terminal base 1. During the engagement, the anti-loosening thread 13 undergoes elastic deformation, making the threaded connection tighter. The power terminal is inserted into the wire clamping groove 15, and the positioning component is used to restrict and fix the cable in the wire clamping groove 15. When vibration occurs, the discontinuous threads of the anti-loosening thread 13 disrupt the vibration transmission path, requiring the release of the loosening thread to overcome the friction of multiple independent contact surfaces simultaneously.

Claims

1. A loosening-preventing compression structure of a terminal of an UPS power supply, comprising a terminal base (1), characterized in that, The terminal base (1) is provided with a stepped pressing bolt, The stepped pressing bolt comprises a threaded segment (2) and a wire pressing segment (3), the threaded segment (2) is fixed on the terminal base (1), the wire pressing segment (3) is arranged below the threaded segment (2), and a wire pressing groove (15) is arranged on the wire pressing segment (3), the wire pressing groove (15) is used for accommodating a cable; The wire pressing groove (15) is provided with a positioning member, and the cable is limited and fixed in the wire pressing groove (15) by the positioning member; An elastic pressing assembly is arranged between the stepped pressing bolt and the terminal base (1).

2. The anti-loosening hold-down structure of the UPS power terminal according to claim 1, characterized in that, The elastic pressing assembly comprises a disc spring piece group and a locking washer (9), and the disc spring piece group and the locking washer (9) are coaxially arranged on one end of the threaded segment (2) close to the wire pressing segment (3).

3. The anti-loosening hold-down structure of the UPS power terminal according to claim 2, characterized in that, An annular boss (4) is arranged between the threaded segment (2) and the wire pressing segment (3), the boss (4) is in threaded connection with the threaded segment (2), one side of the boss (4) close to the threaded segment (2) is provided with an annular groove, and the size of the annular groove is matched with the locking washer (9).

4. The anti-loosening hold-down structure of the UPS power terminal according to claim 2, characterized in that, The disc spring piece group comprises at least two spring pieces with different stiffnesses and is formed by opposite stacking.

5. The anti-loosening hold-down structure of the UPS power terminal according to claim 4, characterized in that, The disc spring piece group comprises a first spring piece (6), a second spring piece (7) and a third spring piece (8), the first spring piece (6) and the third spring piece (8) are oppositely concave, and the second spring piece (7) is arranged between the first spring piece (6) and the third spring piece (8) and oppositely concave to the first spring piece (6).

6. The anti-loosening hold-down structure of the UPS power terminal according to claim 1, characterized in that, One end of the wire pressing groove (15) away from the threaded segment (2) is an open end (14), an axial groove (16) is arranged in the wire pressing groove (15), a radial protruding tooth (17) is arranged on the limiting member (5), the radial protruding tooth (17) is in interference fit with the axial groove (16), and the power line terminal is pressed into the wire pressing groove (15) by using the limiting member (5).

7. The anti-loosening hold-down structure of the UPS power terminal according to claim 6, characterized in that, A groove (10) is arranged on the top of the limiting member (5), a lifting head (11) is arranged on the top of the limiting member (5), and the limiting member (5) is in interference fit with the wire pressing groove (15).

8. The anti-loosening hold-down structure of the UPS power terminal according to claim 1, characterized in that, An anti-loosening thread (13) is arranged on one end of the threaded segment (2) close to the elastic pressing assembly, and the thread of the anti-loosening thread (13) is a discontinuous thread.

9. The anti-loosening hold-down structure of the UPS power terminal according to claim 1, characterized in that, A rubber protective sleeve is arranged outside the wire pressing segment (3), the rubber protective sleeve is in a U-shaped structure, and a through hole is arranged at the bottom of the U-shaped structure.

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