Hand-cranking propelling mechanism assembly and unit assembly

Abstract

The utility model relates to the technical field of switch cabinets, in particular to a hand-cranking propulsion mechanism assembly and a unit assembly. The hand-cranking propelling mechanism assembly comprises a hand-cranking propelling mechanism and a boss matching structure, the hand-cranking propelling mechanism comprises a propelling lead screw, a lead screw installation support, an elastic positioning device and an elastic positioning operation device, the boss matching structure is located on a unit chamber, and the elastic positioning device is provided with a positioning piece which is elastically pushed out. When the pushing lead screw rotates to the initial matching angle, the pushing lead screw is clamped into the positioning groove, the elastic positioning operation device is hinged to the lead screw installation support, and in the process that the unit leaves the previous position but does not enter the next position, a boss of the boss matching structure drives the elastic positioning operation device to swing, and the positioning effect of the positioning piece is relieved. The hand-cranking propelling mechanism assembly has the advantages that the hand-cranking propelling mechanism assembly cannot be damaged due to misoperation, the structure is simplified, the function reaches the standard, and operation is more convenient. And meanwhile, positioning hand feeling force and sound prompts can be generated after pushing in place, so that misoperation is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of switch cabinets, in particular to a hand-cranked propulsion mechanism assembly and a unit assembly. Background Art

[0002] A large number of hand-cranked propulsion mechanisms are used in drawer units of low-voltage switchgear, such as the hand-cranked propulsion mechanism of the applicant's patent number ZL200820186443.4, which displays the position and positions the propulsion screw through a gear positioning mechanism driven by a propulsion screw.

[0003] When the hand-cranked propulsion mechanism with the gear positioning mechanism is operated incorrectly, the initial position positioning display is incorrect, resulting in the problem that the unit cannot be pushed into place.

[0004] The reason for the above problem is that the existing hand-cranked propulsion mechanism uses the gear positioning mechanism driven by the propulsion screw to display the position and position the propulsion screw. If the operator is not professional and does not confirm that the gear positioning mechanism displays "separated" when the unit enters the unit room, the propulsion screw has rotated a certain angle, the gear positioning mechanism has passed the separation display position, and the propulsion stroke of the hand-cranked propulsion mechanism has been reduced. When the hand-cranked propulsion mechanism is cranked to display "connected", the unit is not actually pushed to the connection position, and the unit position display is incorrect.

[0005] If the manual propulsion mechanism is still forcibly operated manually, the gears in the gear positioning mechanism may break because the gears in the gear positioning mechanism have rotation angle limits.

[0006] At the same time, when the unit is advancing during the connection stroke, the 630A main circuit connector generates a large plug-in resistance, and the push screw and the grooved positioning piece generate a strong extrusion force, which is biased toward the rear of the push screw. The support force distance of the rear bracket of the push screw is unbalanced with the support force distance of the front bracket, so that the force on the rear of the push screw is greater than that on the front. The push screw and the front and rear brackets are squeezed, which increases the friction resistance of advancement, causes wear on the push screw and the grooved positioning piece, and is not conducive to improving the life of the hand-cranked propulsion mechanism. Utility Model Content

[0007] The technical problem to be solved by the utility model is that the existing hand-cranked propulsion mechanism with a gear positioning mechanism may be damaged due to misoperation, and the position display may be incorrect, resulting in the problem that the unit cannot be propulsed into place.

[0008] The technical solution adopted by the utility model to solve the technical problem is: a hand-cranked propulsion mechanism assembly, including a hand-cranked propulsion mechanism and a boss matching structure, the hand-cranked propulsion mechanism includes a propulsion screw, a screw mounting bracket, an elastic positioning device and an elastic positioning operating device, the hand-cranked propulsion mechanism is installed in the unit through the screw mounting bracket, the boss matching structure is located on the unit chamber, the propulsion screw is rotatably mounted on the screw mounting bracket, the elastic positioning device is mounted on the screw mounting bracket, the propulsion screw is provided with a positioning groove, the elastic positioning device has an elastically pushed-out positioning piece, when the propulsion screw is rotated to the starting matching angle, the card The elastic positioning operating device is hinged on the screw mounting bracket to enable the elastic positioning operating device to swing up and down around the hinge point. The swinging end of the elastic positioning operating device is driven to cooperate with the positioning piece of the elastic positioning operating device. The elastic positioning operating device has an extension portion that passes through the unit. The extension portion cooperates with the boss matching structure and is used to drive the elastic positioning operating device to swing through the boss of the boss matching structure when the unit leaves the previous position but does not enter the next position, thereby overcoming the elastic force of the positioning piece, pushing the positioning piece to retract, and releasing the positioning effect of the positioning piece on the propulsion screw.

[0009] In some embodiments, optionally, the specific structure of the driving cooperation is: the side of the positioning member has a protruding lever, and the swing end of the elastic positioning operating device acts on the lever of the positioning member to push the positioning member to retract.

[0010] In some embodiments, optionally, the elastic positioning operating device includes a left-side connecting rod, a right-side connecting rod and a positioning member driving plate, the left-side connecting rod and the right-side connecting rod are respectively located on the left and right sides of the advancement screw, one end of the left-side connecting rod and the right-side connecting rod are hinged on the screw mounting bracket, the other ends of the left-side connecting rod and the right-side connecting rod are respectively fixed on the left and right sides of the positioning member driving plate, and a positioning member yielding opening is provided on the positioning member driving plate, the positioning member passes through the positioning member yielding opening to position the advancement screw, the positioning member driving plate acts on the lever to push the positioning member to retract, and the left-side connecting rod and / or the right-side connecting rod have an extension portion on the elastic positioning operating device.

[0011] In some embodiments, optionally, the extension portion has a roller installed through a roller shaft, and the extension portion cooperates with the boss cooperation structure through the roller.

[0012] In some embodiments, optionally, the hand-cranked propulsion mechanism assembly further includes a groove-shaped positioning member, which is mounted on the unit chamber, and has a matching groove structure that cooperates with the propulsion screw rod to produce a propulsion effect, and the boss matching structure is located on the side of the matching groove structure of the groove-shaped positioning member, and is used to cooperate with the extension portion of the elastic positioning operating device on the same side;

[0013] Alternatively, the boss matching structure is located on a separate boss matching piece, which is mounted on the unit chamber and located on the side of the groove-shaped positioning piece, and is used to match with the extension of the elastic positioning operating device on the same side;

[0014] Alternatively, the boss matching structure is a main body structure on the unit chamber and is located on the side of the groove-shaped positioning member, and is used to match with the extension portion of the elastic positioning operating device on the same side.

[0015] In some embodiments, optionally, the elastic positioning device includes a positioning base, an elastic member and a positioning member, the positioning member can be telescopically inserted into the positioning base, the elastic member is installed in the positioning base to elastically push out the positioning member, and the elastic positioning device is installed on the screw mounting bracket through the positioning base.

[0016] In some embodiments, optionally, the positioning groove is located at the front end of the push screw, and the elastic positioning device is located above the front end of the push screw.

[0017] In some embodiments, optionally, the advancement screw includes a spiral portion and a front end shaft and a rear end shaft at both ends of the spiral portion, and the advancement screw is rotatably mounted on the screw mounting bracket through the front end shaft and the rear end shaft, an operating sleeve is sleeved on the front end shaft, and a positioning groove is located on the operating sleeve.

[0018] In some embodiments, optionally, the advancement screw includes a spiral portion and a front end shaft and a rear end shaft at both ends of the spiral portion, the screw mounting bracket includes a front bracket and a rear bracket, the front bracket and the rear bracket are respectively located on the front and rear sides of the advancement screw, and the specific structure of the advancement screw rotatably mounted on the screw mounting bracket is: the front end shaft of the advancement screw passes through the axial hole of the front bracket, and the rear end shaft of the advancement screw passes through the axial hole of the rear bracket; the screw mounting bracket also includes an auxiliary support bracket, the auxiliary support bracket is arranged behind the rear bracket, the rear end axis of the advancement screw extends toward the auxiliary support bracket and passes through the axial hole of the auxiliary support bracket, and the axial hole of the rear bracket and the axial hole of the auxiliary support bracket are spaced from each other.

[0019] In some embodiments, optionally, the screw mounting bracket further includes a cover plate, the cover plate is located above the advancing screw, the front bracket and the rear bracket are connected together through the cover plate, and the auxiliary support bracket is fixed on the rear bracket.

[0020] A unit assembly comprises a unit chamber, a unit and the above-mentioned hand-cranked propulsion mechanism assembly.

[0021] In some embodiments, optionally, the unit assembly also includes a travel switch splitting and combining action assembly, the travel switch splitting and combining action assembly includes a travel switch splitting and combining action device and a splitting and combining action matching piece, the travel switch splitting and combining action device is installed in the unit, and the splitting and combining action matching piece is installed on the unit chamber, the travel switch splitting and combining action device includes a travel switch and a splitting and combining spring arm, the unit is provided with a clearance opening, the splitting and combining spring arm has an entry portion entering the unit chamber through the clearance opening, the entry portion is provided with a matching portion, the splitting and combining action matching piece is provided with a boss, the splitting and combining spring arm cooperates with the boss of the splitting and combining action matching piece through the matching portion, and is used for, when the unit reaches the set position, driving the splitting and combining spring arm through the boss of the splitting and combining action matching piece to overcome its own elastic swing and press the travel switch.

[0022] In some embodiments, optionally, the travel switch and the separation and combination elastic arm of the travel switch separation and combination action device are installed on a travel switch bracket and are installed in the unit through the travel switch bracket; the boss of the separation and combination action matching piece is located on the side of the separation and combination action matching piece, and the separation and combination elastic arm is located on the side of the boss; one end of the separation and combination elastic arm is a fixed end, which is fixed to the travel switch bracket, and the other end is a swing end, and the separation and combination elastic arm presses the travel switch through the swing end; the travel switch bracket has an extension plate that passes through a clearance opening on the unit and enters the unit chamber, the fixed end of the separation and combination elastic arm is fixed on the extension plate, and one side of the fixed end of the separation and combination elastic arm is an entry portion, which enters the unit chamber through the clearance opening; the matching portion of the separation and combination elastic arm is a bent portion of the separation and combination elastic arm that is bent outward between the fixed end and the swing end, and the bent portion is located at the entry portion of the separation and combination elastic arm.

[0023] The beneficial effects of the utility model are as follows: the hand-cranked propulsion mechanism assembly will not be damaged due to misoperation, and the structure is simplified, the functions meet the standards, the application operation is more convenient and faster, and the cost is reduced.

[0024] At the same time, after being pushed into place, the push screw will be elastically positioned by the elastic positioning device and produce a certain positioning tactile force, and at the same time produce a click sound prompt, so that the operator can clearly feel that the hand-cranked propulsion mechanism is positioned, determine the number of hand-cranked circles, and combine the position displayed by the position display device to avoid misoperation.

[0025] In addition, by lengthening the rear end shaft of the propulsion screw rod 1 and installing an auxiliary support bracket, the propulsion friction resistance is reduced and the service life of the hand-cranked propulsion mechanism is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0027] Figure 1 It is a front three-dimensional structural schematic diagram of the hand-cranked propulsion mechanism of the utility model without the elastic positioning device and the elastic positioning operating device installed;

[0028] Figure 2 It is a back three-dimensional structural schematic diagram of the hand-cranked propulsion mechanism of the utility model without the elastic positioning device and the elastic positioning operating device installed;

[0029] Figure 3 It is a front three-dimensional structural schematic diagram of the hand-cranked propulsion mechanism of the utility model;

[0030] Figure 4 It is a back three-dimensional structural schematic diagram of the hand-cranked propulsion mechanism of the utility model;

[0031] Figure 5 It is a front three-dimensional structural schematic diagram of the hand-cranked propulsion mechanism of the utility model without the elastic positioning operation device installed;

[0032] Figure 6 It is a front three-dimensional structural schematic diagram of the groove-shaped positioning member of the utility model;

[0033] Figure 7 It is a schematic diagram of the structure of the hand-cranked propulsion mechanism of the utility model from a top view;

[0034] Figure 8 yes Figure 7 AA section view;

[0035] Fig. 9 yes Figure 8 A schematic diagram of the structure in which the positioning member is separated from the positioning groove;

[0036] Fig.10 It is a structural schematic diagram of the hand-cranked propulsion mechanism assembly of the utility model from a front view when it is in a separated position;

[0037] Fig.11 yes Fig.10 A schematic diagram of the structure from a side perspective;

[0038] Fig.12 It is a side view structural diagram of the hand-cranked propulsion mechanism assembly of the utility model after being cranked into the separation position for one circle;

[0039] Fig.13 yes Fig.12 AA section view;

[0040] Fig.14 It is a structural schematic diagram of the hand-cranked propulsion mechanism assembly of the utility model in a front view when the hand-cranked propulsion mechanism assembly is in a test position;

[0041] Fig.15 yes Fig.14 A schematic diagram of the structure from a side perspective;

[0042] Fig.16 It is a side view structural diagram of the hand-cranked propulsion mechanism assembly of the utility model after being cranked into the test position for one circle;

[0043] Fig.17 yes Fig.16 AA section view;

[0044] Fig.18 It is a structural schematic diagram of the hand-cranked propulsion mechanism assembly of the utility model when it is in a connected position from a front perspective;

[0045] Fig.19 yes Fig.18 A schematic diagram of the structure from a side perspective;

[0046] Fig. 20 It is a structural schematic diagram of the side view of the travel switch opening and closing action device of the utility model;

[0047] Fig.21 It is a structural schematic diagram of the three-dimensional perspective of the travel switch opening and closing action device of the utility model;

[0048] Fig. 22 It is a structural schematic diagram of the splitting and closing action devices of the left and right travel switches of the utility model cooperating with the splitting and closing action matching parts in the test position;

[0049] Fig.23 It is a schematic diagram of the assembly relationship of the travel switch separation and combination action device of the utility model in the test position and the separation and combination action matching piece;

[0050] Fig.24 yes Fig. 22 Schematic diagram of the structure in the test-connection process;

[0051] Fig.25 yes Fig. 22 Schematic diagram of the structure in the connected position;

[0052] Fig.26 is a front structural schematic diagram of the drawer unit after the unit panel is removed;

[0053] Fig. 27 yes Fig.26 Schematic diagram of the structure in the closed state;

[0054] Fig.28 is a schematic diagram of the back structure of the drawer unit;

[0055] Fig.29 It is a structural schematic diagram of a unit room of the utility model;

[0056] Fig.30 It is a structural schematic diagram of the 125A and 250A drawer unit assemblies of the utility model;

[0057] Fig.31It is a structural schematic diagram of the 400A and 630A drawer unit assemblies of the utility model;

[0058] In the figure, 1. push screw, 1-1. rear end shaft, 2-1. front bracket, 2-2. rear bracket, 2-3. auxiliary support bracket, 2-4. cover plate, 3-1. left connecting rod, 3-2. right connecting rod, 3-3. positioning member driving plate, 3-3-1. positioning member yielding opening, 3-4. extension part, 3-5. roller, 4-1. positioning base, 4-2. elastic member, 4-3. positioning member, 4-3-1. lever, 5. unit room, 5-1. unit room layer plate, 6 . Boss, 7. Positioning groove, 8. Unit, 8-1. Unit bottom plate, 9. Groove-shaped positioning piece, 9-1. Matching groove structure, 10. Operating shaft sleeve, 11-1. Splitting and closing action matching piece, 11-2. Travel switch, 11-3. Splitting and closing spring arm, 11-4. Travel switch bracket, 12-1. Position display board, 12-2. Position display fixing bracket, 13-1. Closing interlock rod, 13-2. Closing interlock plate, 14. Unit panel, 15. Position indication observation window. DETAILED DESCRIPTION

[0059] like Figures 1 to 19 As shown, a hand-cranked propulsion mechanism assembly includes a hand-cranked propulsion mechanism and a boss matching structure. The hand-cranked propulsion mechanism includes a propulsion screw 1, a screw mounting bracket, an elastic positioning device and an elastic positioning operating device. The hand-cranked propulsion mechanism is installed in a unit 8 through a screw mounting bracket. The boss matching structure is located on a unit chamber 5. The propulsion screw 1 is rotatably mounted on the screw mounting bracket. The elastic positioning device is mounted on the screw mounting bracket. The propulsion screw 1 is provided with a positioning groove 7. The elastic positioning device has a positioning piece 4-3 that is elastically pushed out. When the propulsion screw 1 rotates to a starting matching angle, it is inserted into the positioning groove 7 to position the propulsion screw 1. The elastic positioning operating device is hinged on the screw mounting bracket, and is used to enable the elastic positioning operating device to swing up and down around the hinge point. The swinging end of the elastic positioning operating device is driven and cooperated with the positioning member 4-3 of the elastic positioning operating device. The elastic positioning operating device has an extension portion 3-4 that passes through the unit 8. The extension portion 3-4 cooperates with the boss matching structure, and is used to drive the elastic positioning operating device to swing through the boss 6 of the boss matching structure when the unit 8 leaves the previous position but does not enter the next position, thereby overcoming the elastic force of the positioning member 4-3, pushing the positioning member 4-3 to retract, and releasing the positioning effect of the positioning member 4-3 on the advancing screw 1.

[0060] The specific structure of the driving cooperation is as follows: the side of the positioning member 4-3 has a protruding lever 4-3-1, and the swing end of the elastic positioning operating device acts on the lever 4-3-1 of the positioning member 4-3 to push the positioning member 4-3 to retract.

[0061] The elastic positioning operation device includes a left connecting rod 3-1, a right connecting rod 3-2 and a positioning member driving plate 3-3. The left connecting rod 3-1 and the right connecting rod 3-2 are respectively located on the left and right sides of the advancing screw rod 1. One end of the left connecting rod 3-1 and the right connecting rod 3-2 is hinged on the screw rod mounting bracket. The other ends of the left connecting rod 3-1 and the right connecting rod 3-2 are respectively fixed on the left and right sides of the positioning member driving plate 3-3. The positioning member driving plate 3-3 is provided with a positioning member clearance opening 3-3-1. The positioning member 4-3 passes through the positioning member clearance opening 3-3-1 to position the advancing screw rod 1. The positioning member driving plate 3-3 acts on the lever 4-3-1, specifically the bottom of the lever 4-3-1, to push the positioning member 4-3 to retract. The left connecting rod 3-1 and the right connecting rod 3-2 are both provided with an extension 3-4 on the elastic positioning operation device. There are specifically two levers 4-3-1 on the positioning member 4-3.

[0062] The extension portion 3-4 is provided with a roller 3-5 installed through a roller shaft, and the extension portion 3-4 cooperates with the boss cooperation structure through the roller 3-5.

[0063] like Figure 6 As shown, the hand-cranked propulsion mechanism assembly of this embodiment also includes a groove-shaped positioning member 9, which is installed on the unit chamber 5. The groove-shaped positioning member 9 has a matching groove structure 9-1 that cooperates with the propulsion screw 1 to produce a propulsion effect. The boss matching structure is located on the side of the matching groove structure 9-1 of the groove-shaped positioning member 9, and is used to cooperate with the extension part 3-4 of the elastic positioning operating device on the same side.

[0064] There are two boss matching structures, one on the left and one on the right, located on the left and right sides of the groove-shaped positioning member 9, for driving the left connecting rod 3-1 and the right connecting rod 3-2 respectively.

[0065] The specific structure of the elastic positioning device is: it includes a positioning base 4-1, an elastic member 4-2 and a positioning member 4-3. The positioning member 4-3 can be telescopically inserted into the positioning base 4-1. The elastic member 4-2 is installed in the positioning base 4-1 and elastically pushes out the positioning member 4-3. The elastic positioning device is installed on the screw mounting bracket through the positioning base 4-1.

[0066] The positioning groove 7 is located at the front end of the propulsion screw 1, and the elastic positioning device is located above the front end of the propulsion screw 1. More specifically, the propulsion screw 1 includes a spiral portion and a front shaft and a rear shaft 1-1 at both ends of the spiral portion. The propulsion screw 1 is rotatably mounted on the screw mounting bracket through the front shaft and the rear shaft 1-1. An operating sleeve 10 is sleeved on the front shaft, and the positioning groove 7 is located on the operating sleeve 10. The head end of the operating sleeve 10 has an operating hole for cooperating with a hand crank handle for hand cranking operation.

[0067] The screw mounting bracket includes a front bracket 2-1 and a rear bracket 2-2, and the front bracket 2-1 and the rear bracket 2-2 are respectively located on the front and rear sides of the propulsion screw 1. The specific structure of the propulsion screw 1 rotatably mounted on the screw mounting bracket is: the front end shaft of the propulsion screw 1 passes through the axial hole of the front bracket 2-1, and the rear end shaft 1-1 of the propulsion screw 1 passes through the axial hole of the rear bracket 2-2.

[0068] like Figure 2 As shown, the screw mounting bracket also includes an auxiliary support bracket 2-3, which is arranged behind the rear bracket 2-2. The rear end shaft 1-1 of the push screw 1 extends toward the auxiliary support bracket 2-3 and passes through the axial hole of the auxiliary support bracket 2-3. The axial hole of the rear bracket 2-2 and the axial hole of the auxiliary support bracket 2-3 are spaced apart from each other.

[0069] The screw rod mounting bracket also includes a cover plate 2-4, which is located above the advancing screw rod 1. The front bracket 2-1 and the rear bracket 2-2 are connected together through the cover plate 2-4, and the auxiliary support bracket 2-3 is fixed on the rear bracket 2-2.

[0070] In this embodiment, it is not excluded that the boss matching structure is located on a separate boss matching piece, the boss matching piece is installed on the unit chamber 5, and is located on the side of the groove-shaped positioning piece 9, and is used to match with the extension 3-4 of the elastic positioning operating device on the same side; or, the boss matching structure is a main body structure on the unit chamber 5, and is located on the side of the groove-shaped positioning piece 9, and is used to match with the extension 3-4 of the elastic positioning operating device on the same side. It is also not excluded that the elastic positioning operating device has only a left connecting rod 3-1 or a right connecting rod 3-2; or, even if the elastic positioning operating device has a left connecting rod 3-1 and a right connecting rod 3-2, as long as one of the connecting rods has an extension 3-4 to match with the boss matching structure. It is also not excluded that the auxiliary support bracket 2-3 is directly fixed on the unit 8, specifically on the unit bottom plate 8-1.

[0071] like Figures 26 to 31 As shown, a unit assembly includes a unit chamber 5, a unit 8 and the above-mentioned hand-cranked propulsion mechanism assembly, the hand-cranked propulsion mechanism is installed in the unit 8, and the boss matching structure is located on the unit chamber 5. In this embodiment, the hand-cranked propulsion mechanism is specifically installed on the unit bottom plate 8-1 of the unit 8, and the boss matching structure is located on the unit chamber layer plate 5-1 of the unit chamber 5.

[0072] The unit assembly of this embodiment is a drawer unit assembly, and unit 8 is a drawer unit.

[0073] Fig.30 It is a structural schematic diagram of the 125A and 250A drawer unit assemblies of the utility model.

[0074] Fig.31It is a structural schematic diagram of the 400A and 630A drawer unit assemblies of the utility model.

[0075] Compared with the existing hand-cranked propulsion mechanism assembly with a gear positioning structure, the hand-cranked propulsion mechanism assembly of this embodiment has a position display function and a travel switch separation function separated from the hand-cranked propulsion mechanism assembly, and the position display function and the travel switch separation function are realized by a position display device and a travel switch separation action device that are separately provided. Therefore, the unit assembly also includes a position display device and a travel switch separation action assembly, and the travel switch separation action assembly includes a travel switch separation action device and a separation action matching member 11-1.

[0076] like Figures 20 to 25 As shown, the travel switch separation and combination action device is installed in the unit 8, and the separation and combination action matching piece 11-1 is installed on the unit chamber 5. The travel switch separation and combination action device includes a travel switch 11-2 and a separation and combination elastic arm 11-3. The unit 8 has a clearance opening, and the separation and combination elastic arm 11-3 has an entry portion entering the unit chamber 5 through the clearance opening, and the entry portion has a matching portion. The separation and combination action matching piece 11-1 has a boss 6, and the separation and combination elastic arm 11-3 cooperates with the boss 6 of the separation and combination action matching piece 11-1 through the matching portion, and is used for when the unit 8 reaches the set position, the separation and combination elastic arm 11-3 is driven by the boss 6 of the separation and combination action matching piece 11-1 to overcome its own elastic swing and press the travel switch 11-2.

[0077] The travel switch 11-2 and the separation and combination elastic arm 11-3 of the travel switch separation and combination action device are installed on a travel switch bracket 11-4, and are installed in the unit 8 through the travel switch bracket 11-4; the boss 6 of the separation and combination action matching piece 11-1 is located on the side of the separation and combination action matching piece 11-1, and the separation and combination elastic arm 11-3 is located on the side of the boss 6; one end of the separation and combination elastic arm 11-3 is a fixed end, which is fixed on the travel switch bracket 11-4, and the other end is a swing end. The travel switch 11-2 is pressed by the swinging end; the travel switch bracket 11-4 has an extension plate that passes through the clearance opening on the unit 8 and enters the unit chamber 5, and the fixed end of the separation and combination elastic arm 11-3 is fixed on the extension plate, and one side of the fixed end of the separation and combination elastic arm 11-3 is an entry portion, which enters the unit chamber 5 through the clearance opening; the matching portion of the separation and combination elastic arm 11-3 is a bent portion of the separation and combination elastic arm 11-3 that is bent outward between the fixed end and the swinging end, and the bent portion is located at the entry portion of the separation and combination elastic arm 11-3.

[0078] The splitting and closing elastic arm 11-3 is a steel spring sheet.

[0079] According to the actual needs of customers, two left and right travel switch separation and combination actuating devices are installed in the unit 8. The two left and right travel switch separation and combination actuating devices share a separation and combination actuating matching member 11-1. There is a boss 6 on the left and right sides of the separation and combination actuating matching member 11-1.

[0080] When the unit 8 is in the separated position, the two travel switch separation and closing action devices on the left and right sides are not in contact with the separation and closing action matching member 11-1; Fig. 22 and 23 As shown in FIG. 1 , when the unit 8 is pushed from the separation position to the test position, the right side boss 6 of the separation action matching member 11-1 contacts the separation elastic arm 11-3 of the right side travel switch separation action device, and the swing end of the separation elastic arm 11-3 presses the travel switch 11-2, so that the right side travel switch 11-2 is turned on; Fig.24 As shown in FIG. 1 , when the unit 8 leaves the test position, the right side boss 6 of the split-and-close action matching member 11-1 is disengaged from the split-and-close elastic arm 11-3 of the right side travel switch split-and-close action device, the split-and-close elastic arm 11-3 is reset, and the right side travel switch 11-2 is disconnected; Fig.25 As shown, when the unit 8 is pushed from the test position to the connection position, the boss 6 on the left side of the separation and combination action fitting 11-1 contacts the separation and combination spring arm 11-3 of the left travel switch separation and combination action device, and the swing end of the separation and combination spring arm 11-3 presses the travel switch 11-2, so that the left travel switch 11-2 is turned on.

[0081] According to different needs of customers, the travel switch opening and closing action assembly can be installed arbitrarily to expand the passive contacts.

[0082] like Fig.26 As shown, the position display device includes a position display plate 12-1, the bottom of the position display plate 12-1 has a guide surface, the position display plate 12-1 is fixed on the unit bottom plate 8-1 through a position display fixing bracket 12-2, the position display plate 12-1 and the position display fixing bracket 12-2 are fixed with axle pin type self-tapping bolts, the unit bottom plate 8-1 has a clearance opening, the position display plate 12-1 enters the unit chamber 5 through the clearance opening, the guide surface at the bottom of the position display plate 12-1 contacts the unit chamber layer plate 5-1, when the unit 8 is pushed into the unit chamber 5, the outer edge of the unit chamber layer plate 5-1 pushes the position display plate 12-1 to swing upward synchronously through the guide surface, and the position of the unit 8 is correctly displayed. When the unit 8 exits the unit chamber 5, the position display plate 12-1 is reset by swinging downward through the elastic element, and the position of the unit 8 is correctly displayed.

[0083] like Fig.30 and 31 As shown, a position indicating observation window 15 is provided on the unit panel 14 , and the position display plate 12 - 1 displays the current position of the unit 8 through the position indicating observation window 15 .

[0084] When the hand-cranked propulsion mechanism of this embodiment rotates forward, the unit 8 enters the test position and the connection position in sequence from the separation position. When the hand-cranked propulsion mechanism rotates reversely, the unit 8 withdraws from the connection position to the test position and the separation position in sequence, and finally the unit 8 is pulled out of the unit chamber 5.

[0085] The propulsion stroke of the hand-cranked propulsion mechanism of this embodiment is designed to be 4 turns, that is, the propulsion screw rod 1 of the hand-cranked propulsion mechanism rotates 4 turns, and the unit 8 can be propulsed from the separation position to the connection position.

[0086] The hand-cranked propulsion mechanism used in the market also has a propulsion stroke designed for 2 turns. The pitch of the spiral on the propulsion screw rod 1 of the hand-cranked propulsion mechanism with 2 turns is large, and the slope of the spiral is large. When the unit 8 is pushed to the connection position, the unit 8 tilts left and right by 2.5 to 3.0 mm, causing the secondary connector of the unit 8 to collide, jam and break when plugged in, especially the intelligent connector. There are many cases of damage. At the same time, the phase-to-phase resistance difference of the main circuit connector is 5 to 8 times, and the corresponding temperature rise difference is as high as 30 to 50k. During the operation of the equipment, a phase main circuit connector of the unit 8 is burned out due to the temperature rise.

[0087] The guide rail device installed in conjunction with the unit 8 of this embodiment effectively guides and limits the unit 8 through the hook cooperation between the T-shaped slide column and the T-shaped slide groove of the guide rail, and dynamically limits the left and right tilt of the unit 8 to no more than 1.0 mm.

[0088] like Fig.26 and 27 As shown, the unit 8 of this embodiment also has a closing interlock mechanism. When the unit 8 enters the connection position and the circuit breaker is closed, the closing interlock rod 13-1 of the closing interlock mechanism is inserted into the unit chamber layer plate 5-1 to close the unit 8. At the same time, the closing interlock rod 13-1 pushes the closing interlock plate 13-2 to move by embedding the driving shaft on the closing interlock rod 13-1 into the inclined groove on the closing interlock plate 13-2, blocking the operating hole of the operating shaft sleeve 10 of the hand-cranked propulsion mechanism, so that the unit 8 cannot be manually operated.

[0089] The working process of this embodiment is as follows:

[0090] like Fig.10 and 11 As shown, the unit 8 is in the separated position, the hand-cranked propulsion mechanism is in the initial matching state, the positioning member 4-3 of the elastic positioning device is embedded in the positioning groove 7 of the propulsion screw rod 1, the propulsion screw rod 1 is positioned at the initial matching angle, the matching groove structure 9-1 of the propulsion screw rod 1 and the groove-shaped positioning member 9 begins to enter the matching state, the left and right travel switches 11-2 are in the disconnected state, and the position display device displays "separated";

[0091] like Fig.12 and 13As shown, the hand-cranked propulsion mechanism is operated by hand, and the pushing unit 8 is pushed from the separation position to the test position. When the hand-cranked propulsion mechanism is shaken for one circle, the roller 3-5 of the elastic positioning operation device begins to cooperate with the boss 6 on the groove-shaped positioning member, and the boss 6 pushes the front of the left connecting rod 3-1 and the right connecting rod 3-2 to lift up through the roller 3-5, and the positioning member driving plate 3-3 lifts the positioning member 4-3, releasing the positioning effect of the positioning member 4-3 on the propulsion screw 1, and the positioning member 4-3 will not be stuck in the positioning groove 7;

[0092] Continue to manually operate the manual propulsion mechanism, the roller 3-5 of the elastic positioning operating device is separated from the boss 6 on the grooved positioning member, the elastic positioning operating device loses the driving force to lift the positioning member 4-3, the front parts of the left connecting rod 3-1 and the right connecting rod 3-2 fall, the positioning member 4-3 is elastically pushed out and abuts against the operating shaft sleeve 10 at the front end of the propulsion screw rod 1;

[0093] like Fig.14 and 15 As shown in the figure, when the hand-cranked propulsion mechanism is shaken to the second circle, the unit 8 is pushed to the test position, and the positioning member 4-3 of the elastic positioning device is embedded in the positioning groove 7 of the propulsion screw rod 1, which has a positioning effect on the propulsion screw rod 1, prompting that it has entered the test position, and the positioning member 4-3 is embedded in the positioning groove 7 and a sound is produced to realize the sound prompt. The right travel switch 11-2 is pressed by the swing end of the separation and closing elastic arm 11-3, so that the right travel switch 11-2 is turned on. Fig. 22 and 23 As shown;

[0094] like Fig.16 and 17 As shown, the manual propulsion mechanism is continued to be manually operated, and the push unit 8 is pushed from the test position to the connection position. When the manual propulsion mechanism is shaken to the third circle, the roller 3-5 of the elastic positioning operation device begins to cooperate with the second boss 6 of the boss matching structure, and the positioning function of the positioning member 4-3 on the propulsion screw rod 1 is released, and the positioning member 4-3 will not be stuck in the positioning groove 7;

[0095] like Fig.18 and 19 As shown, when the hand-cranked propulsion mechanism is shaken to the fourth circle, the unit 8 is pushed to the connection position, and the positioning member 4-3 of the elastic positioning device is embedded in the positioning groove 7 of the propulsion screw rod 1, which has a positioning effect on the propulsion screw rod 1, prompting that it has entered the connection position, and the positioning member 4-3 is embedded in the positioning groove 7 and a sound is produced to realize the sound prompt. The left travel switch 11-2 is pressed by the swing end of the separation and combination elastic arm 11-3, so that the left travel switch 11-2 is turned on. Fig.25 shown.

[0096] The boss cooperation structure on the elastic positioning operating device and the matching grooved positioning member 9 realizes that the hand-cranked propulsion mechanism will not be positioned every 1 circle, but can achieve 2 circles of positioning, and even multiple circles of positioning can be achieved as needed. Every time the hand-cranked propulsion mechanism is cranked 2 circles, the unit 8 can move from the previous position to the next position, and the position display of the unit 8 is correct, which meets the functions required by the standard.

[0097] The elastic positioning operation device of the manual propulsion mechanism can be cancelled, and the manual propulsion mechanism is further simplified. Each time the propulsion screw 1 is cranked, the positioning member 4-3 will be embedded in the positioning groove 7 of the operating sleeve 10, and a sound prompt will be issued. After the manual propulsion screw 1 is cranked for 2 turns, the unit 8 can move from the previous position to the next position, and the position display device displays the current position of the unit 8. The propulsion function also meets the standard application requirements and provides users with optional applications.

[0098] The effects of this embodiment are:

[0099] Compared with the existing hand-cranked propulsion mechanism assembly with a gear positioning structure, the hand-cranked propulsion mechanism assembly of this embodiment has a position display function and a travel switch separation function separated from the hand-cranked propulsion mechanism assembly, and the position display function and the travel switch separation function are realized by a position display device and a travel switch separation action device that are separately provided. Even if the propulsion screw rod 1 of the hand-cranked propulsion mechanism is not at the starting matching angle due to an operator's misoperation, the propulsion stroke of the hand-cranked propulsion mechanism will not change, and the position display device can still correctly display the position of the unit 8, and will not cause mechanical failure and damage due to misoperation like the existing hand-cranked propulsion mechanism with a gear positioning structure.

[0100] Compared with the existing hand-cranked propulsion mechanism assembly with a gear positioning structure, the hand-cranked propulsion mechanism assembly of this embodiment has a simplified structure, meets the functional standards, is more convenient and faster to operate, and has reduced costs. The cost is 32% lower than that of the gear positioning structure, and the purchase price of one hand-cranked propulsion mechanism is reduced by 10 to 12 yuan. Currently, the industry uses more than 1.5 million sets of hand-cranked mechanisms each year.

[0101] The hand-cranked propulsion mechanism assembly of the present embodiment can realize that the propulsion screw 1 will be elastically positioned by the elastic positioning device every 2 turns of hand-cranking through the boss matching structure of the elastic positioning operating device and the matching groove-shaped positioning member 9, and a certain positioning tactile force will be generated, and a click sound prompt will be generated at the same time, so that the operator can clearly feel that the hand-cranked propulsion mechanism is positioned, determine the number of hand-cranking turns, and avoid misoperation in combination with the position displayed by the position display device.

[0102] During the advancement of unit 8 in the connection stroke, the main circuit connector generates a large plug-in resistance, especially for the 630A unit. The plug-in pressure of the main circuit connector reaches 1600N, and the push screw 1 and the grooved positioning member 9 generate a strong extrusion force, which is biased toward the rear of the push screw 1. The support force distance of the rear bracket of the push screw is unbalanced with the support force distance of the front bracket, so that the force on the rear of the push screw is greater than that on the front. The push screw and the front and rear brackets are squeezed, which increases the friction resistance of the push, and the push screw and the grooved positioning member are worn, which is not conducive to improving the life of the hand-cranked push mechanism.

[0103] In this embodiment, the rear end shaft 1-1 of the propulsion screw 1 is lengthened, and an auxiliary support bracket 2-3 is additionally installed to provide auxiliary rotation support for the rear end of the propulsion screw 1. During the connection stroke propulsion process of the unit 8, the support force distance of the rear bracket 2-2 of the propulsion screw 1 is basically consistent with the support force distance of the front bracket 2-1, thereby reducing the propulsion friction resistance and improving the life of the hand-cranked propulsion mechanism. In combination with the guide rail device installed in conjunction with the unit 8 of this embodiment, the T-shaped slide column and the T-shaped slide groove of the guide rail are matched to effectively guide and limit the unit 8, so that during the propulsion process, especially during the connection stroke propulsion process, the unit 8 is effectively balanced front and back and left and right, the friction between the propulsion screw 1 and the grooved positioning member 9 is reduced, the component loss is reduced, and the mechanical life of the hand-cranked propulsion mechanism assembly is improved. The propulsion life can be greater than 2000 times, which exceeds the standard requirement of 500 times of propulsion life and the user's requirement of 1200 times of propulsion life.

Claims

1. A hand-cranked propulsion mechanism assembly, characterized by: The hand-cranked propulsion mechanism comprises a propulsion screw, a screw mounting bracket, an elastic positioning device and an elastic positioning operating device. The hand-cranked propulsion mechanism is installed in the unit through the screw mounting bracket, the boss matching structure is located on the unit chamber, the propulsion screw is rotatably mounted on the screw mounting bracket, the elastic positioning device is mounted on the screw mounting bracket, the propulsion screw is provided with a positioning groove, the elastic positioning device has an elastically pushed-out positioning piece, when the propulsion screw is rotated to the starting matching angle, it is stuck in the positioning groove to position the propulsion screw, the elastic positioning operating device is hinged on the screw mounting bracket, and is used to enable the elastic positioning operating device to swing up and down around the hinge point, the swinging end of the elastic positioning operating device is driven to cooperate with the positioning piece of the elastic positioning device, the elastic positioning operating device has an extension portion passing through the unit, the extension portion cooperates with the boss matching structure, and is used to drive the elastic positioning operating device to swing through the boss of the boss matching structure when the unit leaves the previous position but does not enter the next position, so as to overcome the elastic force of the pushing positioning piece, push the positioning piece to retract, and release the positioning effect of the positioning piece on the propulsion screw.

2. The hand-cranked propulsion mechanism assembly according to claim 1 is characterized in that: The specific structure of the driving cooperation is as follows: a side of the positioning member is provided with a protruding lever, and the swing end of the elastic positioning operating device acts on the lever of the positioning member to push the positioning member to retract.

3. The hand-cranked propulsion mechanism assembly according to claim 2 is characterized in that: The elastic positioning operating device includes a left connecting rod, a right connecting rod and a positioning member driving plate. The left connecting rod and the right connecting rod are respectively located on the left and right sides of the advancing screw rod. One end of the left connecting rod and the right connecting rod is hinged on the screw rod mounting bracket. The other ends of the left connecting rod and the right connecting rod are respectively fixed on the left and right sides of the positioning member driving plate. A positioning member yielding opening is provided on the positioning member driving plate. The positioning member passes through the positioning member yielding opening to position the advancing screw rod. The positioning member driving plate acts on the shift rod to push the positioning member to retract. The left connecting rod and / or the right connecting rod are provided with an extension portion on the elastic positioning operating device.

4. The hand-cranked propulsion mechanism assembly according to claim 1 or 3, characterized in that: The protruding portion is provided with a roller installed through a roller shaft, and the protruding portion cooperates with the boss cooperation structure through the roller.

5. The hand-cranked propulsion mechanism assembly according to claim 1 or 3, characterized in that: It also includes a groove-shaped positioning piece, which is installed on the unit chamber, and has a matching groove structure that cooperates with the propulsion screw to produce a propulsion effect, and a boss matching structure is located on the side of the matching groove structure of the groove-shaped positioning piece, and is used to cooperate with the extension part of the elastic positioning operating device on the same side; Alternatively, the boss matching structure is located on a separate boss matching piece, which is mounted on the unit chamber and located on the side of the groove-shaped positioning piece, and is used to match with the extension of the elastic positioning operating device on the same side; Alternatively, the boss matching structure is a main body structure on the unit chamber and is located on the side of the groove-shaped positioning member, and is used to match with the extension portion of the elastic positioning operating device on the same side.

6. The hand-cranked propulsion mechanism assembly according to claim 1, 2 or 3, characterized in that: The elastic positioning device comprises a positioning base, an elastic member and a positioning member, the positioning member is telescopically inserted into the positioning base, the elastic member is installed in the positioning base and elastically pushes out the positioning member, and the elastic positioning device is installed on the screw mounting bracket through the positioning base.

7. The hand-cranked propulsion mechanism assembly according to claim 1 is characterized in that: The positioning groove is located at the front end of the advancing screw rod, and the elastic positioning device is located above the front end of the advancing screw rod.

8. The hand-cranked propulsion mechanism assembly according to claim 1 or 7, characterized in that: The advancing screw comprises a spiral portion and a front end shaft and a rear end shaft at both ends of the spiral portion. The advancing screw is rotatably mounted on a screw mounting bracket through the front end shaft and the rear end shaft. An operating sleeve is sleeved on the front end shaft, and a positioning groove is located on the operating sleeve.

9. The hand-cranked propulsion mechanism assembly according to claim 1 is characterized in that: The advancing screw comprises a spiral portion and a front end shaft and a rear end shaft at both ends of the spiral portion, the screw mounting bracket comprises a front bracket and a rear bracket, the front bracket and the rear bracket are respectively located at the front and rear sides of the advancing screw, and the specific structure of the advancing screw being rotatably mounted on the screw mounting bracket is: the front end shaft of the advancing screw passes through the shaft hole of the front bracket, and the rear end shaft of the advancing screw passes through the shaft hole of the rear bracket; The screw mounting bracket also includes an auxiliary support bracket, which is arranged behind the rear bracket. The rear end of the push screw extends axially toward the auxiliary support bracket and passes through the axial hole of the auxiliary support bracket. The axial hole of the rear bracket and the axial hole of the auxiliary support bracket are spaced apart from each other.

10. The hand-cranked propulsion mechanism assembly according to claim 9 is characterized in that: The screw rod mounting bracket also includes a cover plate, which is located above the advancing screw rod. The front bracket and the rear bracket are connected together through the cover plate, and the auxiliary support bracket is fixed on the rear bracket.

11. A unit assembly, characterized by: It comprises a unit chamber, a unit and the hand-cranked propulsion mechanism assembly as claimed in claim 1.

12. The unit assembly according to claim 11, characterized in that: It also includes a travel switch separation and combination action assembly, which includes a travel switch separation and combination action device and a separation and combination action matching piece. The travel switch separation and combination action device is installed in the unit, and the separation and combination action matching piece is installed on the unit chamber. The travel switch separation and combination action device includes a travel switch and a separation and combination spring arm. The unit is provided with a clearance opening, and the separation and combination spring arm has an entry portion that enters the unit chamber through the clearance opening, and the entry portion is provided with a matching portion. The separation and combination action matching piece is provided with a boss, and the separation and combination spring arm cooperates with the boss of the separation and combination action matching piece through the matching portion, and is used for driving the separation and combination spring arm to overcome its own elastic swing and press the travel switch through the boss of the separation and combination action matching piece when the unit reaches the set position.

13. The unit assembly according to claim 12, characterized in that: The travel switch and the opening and closing spring arm of the travel switch opening and closing action device are installed on a travel switch bracket and installed in the unit through the travel switch bracket; The boss of the splitting and closing action matching piece is located on the side of the splitting and closing action matching piece, and the splitting and closing elastic arm is located on the side of the boss; One end of the separation and closing spring arm is a fixed end, which is fixed on the travel switch bracket, and the other end is a swing end, and the separation and closing spring arm presses the travel switch through the swing end; The travel switch bracket has a protruding plate passing through a clearance opening on the unit to enter the unit chamber, the fixed end of the separation and combination elastic arm is fixed on the protruding plate, and one side of the fixed end of the separation and combination elastic arm is an entry portion, which enters the unit chamber through the clearance opening; The matching portion of the split-and-close elastic arm is a bent portion of the split-and-close elastic arm that is bent outwards and is located between the fixed end and the swing end, and the bent portion is located at the entrance portion of the split-and-close elastic arm.

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