Expanding machine for cold-shrink rubber tube
By designing an automated cold shrink hose expansion machine, the problems of low efficiency and poor product consistency of existing expansion machines are solved, and efficient and automated production processes and high-quality products are achieved.
Patent Information
- Application Number
- CN202420764352.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-15
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-04-15
AI Technical Summary
Existing expansion machines for cold-shrink hose production are inefficient and have poor product consistency, resulting in poor production efficiency and product quality.
A cold shrink hose expansion machine is designed, adopting an automated process, including a fixed base, a mobile expansion assembly, a fixed support assembly, a hose clamp and a gripping assembly, which automatically expands through sliding connections and motor drives.
It improves the automation level of cold shrink hose production, can generate multiple products in one process, provides several times the output compared to existing equipment, improves production efficiency, and has good product specifications and quality.
Smart Images
Figure CN222768973U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of cold shrink rubber hose production, in particular to a cold shrink rubber hose expander. Background Art
[0002] Cold shrink tubing refers to cold shrinkable cable accessories. The existing expansion machines used for the production of cold shrink hoses are semi-manual production and can only complete one tube at a time. This processing method is inefficient. At the same time, due to the existence of manual operation, the consistency of the products is poor, affecting product quality. Utility Model Content
[0003] In view of the deficiencies in the prior art, the utility model provides a cold shrink hose expander to realize automation of cold shrink hose expansion and improve production efficiency.
[0004] A cold shrink hose expander comprises a fixed base and a mobile expansion assembly, a fixed support assembly, a movable hose clamp and a grab assembly which are sequentially arranged on the fixed base for expansion. The fixed support assembly is fixed on the fixed base and comprises a braided sleeve bracket. The braided sleeve bracket is provided with a plurality of expansion holes arranged side by side along the axial direction. The braided sleeve is fixed on the braided sleeve bracket. The mobile expansion assembly is slidably connected to the fixed base and is located at the front end of the fixed support assembly. The hose clamp and the grab assembly are sequentially slidably connected to the braided sleeve near the mobile expansion assembly. On the fixed base, the hose clamp clamps the cold shrink hose to be expanded; the grabbing assembly includes a retractable pawl that can pass through the cold shrink hose to be expanded on the hose clamp to the braided sleeve, and the retractable pawl can grab or release the braided sleeve; the movable expansion assembly includes a double-layer expansion steel tube, and the support bar is placed inside the expansion steel tube and extends out of the end of the expansion steel tube; the end of the expansion steel tube is movably connected with a conical movable expansion guide, and the movable expansion guide can be guided through the expansion hole and inserted into the braided sleeve, so as to support the braided sleeve and expand the cold shrink hose with expansion.
[0005] The braided sleeve is fixed on the flange plate facing the expansion hole. Specifically, the braided sleeve is fixed on the flange plate by a clip, and the clip is a clamp.
[0006] The movable expansion component is slidably connected to the fixed base through a movable slide rail and is located at the front end of the fixed support component. The movable expansion component includes an expansion steel tube movable support slidably connected to the fixed base. The expansion steel tube movable support is provided with a plurality of expansion holes 2 which are the same number and coaxial with the expansion holes. The expansion steel tube is inserted and fixed in the expansion hole 2. A support bar push rod is slidably connected inside the expansion steel tube. The support bar push rod is used to move the support bar along the axial direction of the expansion steel tube and push it until the end of the expansion steel tube is exposed.
[0007] The double-layer expansion steel tube comprises an inner expansion tube and an outer expansion tube. The expansion tube is provided with a plurality of air guide grooves along the axial direction, and the air guide grooves are evenly distributed along the circumference of the expansion tube. The air guide grooves are provided with a plurality of air outlet holes, so that the air guide grooves are connected with the expansion inner tube and the expansion outer tube. An air inlet pipe is provided on the movable support of the expansion steel tube, and is connected with the expansion inner tube and the expansion outer tube. The gas enters between the expansion inner tube and the expansion outer tube from the air inlet at the top of the air inlet pipe, and is discharged from the air outlet holes on the expansion outer tube.
[0008] The hose clamp comprises an upper die and a lower die which can be clamped up and down, and a plurality of semicircular holes are arranged side by side on opposite sides of the upper die and the lower die, and a circular expansion hole is formed after the upper and lower semicircular holes are clamped, which is the same number and coaxial with the expansion hole; first springs are arranged opposite to each other on the upper and lower dies, and a hose locking block is fixed at the end of the first spring, and a semicircular silicone tube fixing hole is formed at the end of the hose locking block, and the silicone tube fixing holes of the upper and lower hose locking blocks form a complete circular fixing hole after the mold is clamped, which is used to clamp the cold shrink hose to be expanded.
[0009] A polyurethane layer is arranged on the inner side wall of a semicircular hole provided on one side opposite to the upper die and the lower die, and the outer diameter of the expanded steel pipe is greater than the inner diameter of the polyurethane layer.
[0010] The grabbing assembly includes a sliding support that is slidably connected to a fixed base via a movable slide rail, and a cantilevered sleeve is arranged side by side on the sliding support close to the hose clamp. The sleeves are the same number and coaxial as the expansion holes; a sleeve introduction rod is slidably connected inside the sleeve, and a plurality of retractable ratchets are arranged at the front end of the sleeve introduction rod.
[0011] The end of the sleeve away from the retractable pawl is fixed on the movable bracket, and the movable bracket is slidably connected to the slide rail of the sliding support; the movable bracket contacts the cam, and the cam is fixed to the output end of the motor; a second spring is arranged between the movable bracket and the sliding support, and the second spring and the cam are located on the same side; when the retractable pawl is in the retracted state, the retractable pawl is retracted in the sleeve, the highest point of the cam contacts the movable bracket, and the second spring is in an extended state.
[0012] The beneficial effects of the utility model are as follows: the cold shrink hose expander provided by the utility model has a high degree of automation, and can generate multiple cold shrink hoses in one process. Compared with the existing equipment, the utility model can provide several times the output and improve the production efficiency; at the same time, the products produced by the equipment are standardized and of good quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic diagram of the overall connection of the cold shrink hose expander provided by the utility model;
[0014] Figure 2 for Figure 1 AA view in the figure;
[0015] Figure 3 for Figure 1 BB view in the figure;
[0016] Figure 4 for Figure 1 The enlarged view of the C part in FIG.
[0017] Figure 5 It is a schematic cross-sectional view of the expanded steel pipe in the utility model;
[0018] Figure 6 for Figure 5 Left view of
[0019] Figure 7 It is a schematic diagram of the movable expansion guide in the utility model;
[0020] Figure 8 A schematic diagram of the state where the retractable pawl is retracted inside the sleeve;
[0021] Fig. 9 This is a schematic diagram of the state where the pawl is retracted and released and exposed outside the sleeve;
[0022] Fig.10 It is a schematic diagram of the state after the grabbing component moves toward the hose clamp;
[0023] Fig.11 It is a schematic diagram of the state in which the braided sleeve is inserted into the cold shrink hose after the hose fixture moves toward the fixed support component;
[0024] Fig.12 It is a schematic diagram of the state after the mobile expansion component moves toward the fixed support component and the mobile expansion component inserts the braided sleeve to expand the cold shrink rubber hose;
[0025] Fig.13 This is a schematic diagram showing the state where the support strip is exposed after the movable expansion leader is removed;
[0026] Fig.14 Complete the schematic diagram for the expansion;
[0027] Fig.15 This is a schematic diagram of the finished product;
[0028] in,
[0029] 1 fixed base, 2 movable expansion component, 21 expansion steel pipe movable support, 22 expansion steel pipe, 221 expansion inner tube, 222 expansion outer tube, 223 air outlet, 224 air guide groove, 23 support bar, 24 support bar push rod, 25 movable expansion guide, 26 air inlet pipe, 27 air inlet, 3 fixed support component, 31 braided sleeve bracket, 32 braided sleeve, 33 flange, 34 clip, 4 hose clamp, 41 upper mold, 42 lower mold, 43 polyurethane layer, 44 first spring, 45 hose locking block, 46 cold shrink hose to be expanded, 5 grabbing component, 51 sliding support, 52 sleeve, 53 sleeve introduction rod, 54 retractable ratchet, 541 movable bracket, 542 second spring, 543 slide rail, 544 cam, 55 finished product. DETAILED DESCRIPTION
[0030] In order to better explain the present invention and facilitate understanding, the technical scheme and effects of the present invention are described in detail below through specific implementation modes in conjunction with the accompanying drawings.
[0031] like Figure 1-Figure 4 As shown, a cold shrink hose expander comprises a fixed base 1 and a movable expansion component 2, a fixed support component 3, a movable hose clamp 4 and a grabbing component 5 which are sequentially arranged on the fixed base 1 for expansion.
[0032] The fixed support assembly 3 is fixed on the fixed base 1, and includes a braided sleeve bracket 31. In this embodiment, five expansion holes 1 are arranged side by side along the axial direction on the braided sleeve bracket 31. The braided sleeve 32 is fixed on the braided sleeve bracket 31 through a flange 33 facing the expansion holes 1; the braided sleeve 32 is fixed on the flange 33 through a clip 34, and the clip 34 is a clamp. In this embodiment, the braided sleeve 32 is a braided cloth bag with an open end made of ultra-high molecular weight polyethylene fiber.
[0033] The mobile expansion assembly 2 is slidably connected to the fixed base 1 through a mobile slide rail, located at the front end of the fixed support assembly 3, and inserted into the braided sleeve 32 that has been inserted into the cold shrink rubber tube through the expansion hole, so as to prop up the braided sleeve 32 and complete the expansion. The mobile expansion assembly 2 includes an expansion steel tube mobile support 21 that is slidably connected to the fixed base 1. The expansion steel tube mobile support 21 is driven by a motor. A lead screw driving structure (not shown in the figure) is arranged between the motor and the expansion steel tube mobile support 21. The output end of the motor is connected to the lead screw, and the bottom of the expansion steel tube mobile support 21 is threadedly connected to the lead screw. The rotation of the motor drives the lead screw to rotate, thereby driving the expansion steel tube mobile support 21 to move along the slide rail. The expansion steel tube movable support 21 is provided with a plurality of expansion holes 2 which are the same number and coaxial with the expansion holes, an expansion steel tube 22 is inserted and fixed in the expansion hole 2, a support bar push rod 24 is slidably connected inside the expansion steel tube 22, a support bar 23 is placed inside the expansion steel tube 22 and extends out of the end of the expansion steel tube 22, and the support bar push rod 24 is used to move the support bar 23 along the axial direction of the expansion steel tube 22 and push it until the end of the expansion steel tube 22 is exposed; Figure 5-Figure 6 As shown, the expansion steel tube 22 is a double-layer tube, including an inner expansion tube 221 and an outer expansion tube 222. Six air guide grooves 224 are axially provided on the expansion tube 222, and the air guide grooves 224 are evenly distributed along the circumference of the expansion tube; a plurality of air outlet holes 223 are provided on the air guide grooves 224, so that the air guide grooves 224 are connected with the expansion tube 221 and the expansion tube 222; an air inlet pipe 26 is provided on the expansion steel tube movable support 21, and is connected with the expansion tube 221 and the expansion tube 222; the gas enters between the expansion tube 221 and the expansion tube 222 from the air inlet 27 at the top of the air inlet pipe 26, and is discharged from the air outlet holes 223 on the expansion tube 222. Figure 7 As shown, the exposed end of the support strip of the expansion steel tube 22 is movably connected with a conical movable expansion guide 25 for guiding the expansion steel tube 22 to be inserted into the braided sleeve 32 and realize expansion.
[0034] The hose fixture 4 and the braided sleeve 32 of the grabbing assembly 5 close to the movable expansion assembly 2 are slidably connected to the fixed base 1 in turn through the movable slide rail. The hose fixture 4 includes an upper mold 41 and a lower mold 42 that can be molded up and down. The lower mold 42 is driven by a motor. A lead screw drive structure (not shown in the figure) is arranged between the motor and the lower mold 42. The output end of the motor is connected to the lead screw, and the bottom of the lower mold 42 is threadedly connected to the lead screw. The motor rotates to drive the lead screw to rotate, thereby driving the lower mold 42 to move along the slide rail. A plurality of semicircular holes are arranged side by side on the opposite side of the upper mold 41 and the lower mold 42. A polyurethane layer 43 is arranged on the inner wall of the semicircular hole. After the upper and lower semicircular holes are molded together, a circular expansion hole is formed, which is the same number and coaxial with the expansion hole; the outer diameter of the expansion steel pipe 22 is larger than the inner diameter of the polyurethane layer 43. First springs 44 are arranged on the upper mold 41 and the lower mold 42 in an upper and lower position relative to each other, and a hose locking block 45 is fixed to the end of the first spring 44. A semicircular silicone tube fixing hole is opened at the end of the hose locking block 45. After the mold is closed, the silicone tube fixing holes of the upper and lower hose locking blocks 45 form a complete circular fixing hole for clamping the cold shrink hose 46 to be expanded.
[0035] The grab assembly 5 includes a sliding support 51 that is slidably connected to the fixed base 1 through a movable slide rail. The sliding support 51 is driven by a motor. A lead screw driving structure (not shown in the figure) is arranged between the motor and the sliding support 51. The output end of the motor is connected to the lead screw. The bottom of the sliding support 51 is threadedly connected to the lead screw. The motor rotates to drive the lead screw to rotate, thereby driving the sliding support 51 to move along the slide rail. A cantilevered sleeve 52 is arranged side by side on the sliding support 51 near the hose clamp 4. The sleeve 52 is the same number and coaxial with the expansion hole. A sleeve introduction rod 53 is slidably connected inside the sleeve 52. A plurality of retractable ratchet pawls 54 are arranged at the front end of the sleeve introduction rod 53. The sleeve 52 and the sleeve introduction rod 53 pass through the hose clamp 4 and stop at the braiding sleeve 32. At this time, the sleeve 52 moves backward to expose the retractable ratchet 54. The retractable ratchet 54 opens and continues to move toward the braiding sleeve 32 to grab the braiding sleeve 32.
[0036] The end of the sleeve 52 away from the retractable pawl 54 is fixed to the movable bracket 541, and the movable bracket 541 is slidably connected to the slide rail 543 of the sliding support 51, and the slide rail 543 is fixed to the sliding support 51; the movable bracket 541 is in contact with the cam 544, and the cam 544 is fixed to the output end of the motor (not shown in the figure); a second spring 542 is arranged between the movable bracket 541 and the sliding support 51, and the second spring 542 and the cam 544 are located on the same side. Figure 8As shown, in the normal contraction state of the retractable pawl 54, the retractable pawl 54 is contracted in the sleeve 52, the highest point of the cam 544 contacts the movable bracket 541, and the second spring 542 is in an extended state. When the grabbing assembly 5 moves to the braiding sleeve 32 and stops, the motor starts to drive the cam 544 to rotate, the highest point of the cam 544 leaves the movable bracket 541, the second spring 542 contracts, and drives the movable bracket 541 and the sleeve 52 to move along the slide rail 543 toward the cam 544, that is, away from the retractable pawl 54, and the sleeve 52 moves away from the retractable pawl 54, the lowest point of the cam 544 contacts the movable bracket 541, and the retractable pawl 54 is completely exposed and opened, as shown in FIG. Fig. 9 As shown; the grabbing assembly 5 continues to move toward the direction approaching the braiding sleeve 32, and the braiding sleeve 32 enters the retracting pawl 54; at this time, the motor starts to drive the cam 544 to rotate, and the lowest point of the cam 544 leaves the movable bracket 541, and the movable bracket 541 drives the sleeve 52 to move toward the direction approaching the retracting pawl 54, and the sleeve 52 then approaches the retracting pawl 54 to retract it into the sleeve 52 to complete the grabbing action.
[0037] The working process of the above-mentioned cold shrink hose expander is as follows:
[0038] S1: Put the cold shrink rubber hose 46 to be expanded into the rubber hose fixture 4 and clamp it, place the support bar 23 inside the expansion steel tube 22, one end of the support bar 23 extends out of the end of the expansion steel tube 22, and fix the movable expansion guide 25 on the expansion steel tube 22;
[0039] S2: Fig.10 As shown, the grab assembly 5 moves toward the direction close to the hose fixture 4, the sleeve 52 passes through the hose fixture 4 and extends outside the hose fixture 4, the sleeve introduction rod 53 moves, and the retractable ratchet 54 extends from the inside of the sleeve 52;
[0040] S3: When using for the first time, hold the braiding sleeve 32 by hand, and use the retractable ratchet 54 to grab the braiding sleeve 32. After the process is completed once, directly enter step S4;
[0041] S4: Fig.11 As shown, the hose fixture 4 moves toward the fixed support assembly 3, and the braided sleeve 32 is inserted into the cold shrink hose 46 to be expanded in the hose fixture 4; then the grabbing assembly 5 moves away from the hose fixture 4 to reset;
[0042] S5: Fig.12As shown, the mobile expansion assembly 2 moves toward the fixed support assembly 3, the expansion steel tube 22 passes through the expansion hole, is inserted into the braided sleeve 32 and extends out, and the tapered movable expansion guide 25 at the front end of the expansion steel tube 22 exposes the braided sleeve 32, so that the braided sleeve 32 and the cold shrink rubber tube 46 to be expanded are expanded at the same time, and the outer surface of the cold shrink rubber tube contacts the inner surface of the polyurethane layer 43;
[0043] S6: Fig.13 As shown, the movable expansion guide 25 is removed, and the support bar 23 extending from the end of the expansion steel tube 22 is exposed outside the hose fixture 4;
[0044] S7: Inflate the space between the expansion outer tube 222 and the expansion inner tube 221 of the expansion steel tube 22 through the air inlet pipe 26, and the gas flows out from the air outlet 223 of the expansion outer tube 222, so that the braided sleeve 32 and the cold shrink hose are suspended on the double-layer steel tube;
[0045] S8: Fig.14 As shown, the hose clamp 4 moves away from the fixed support assembly 3, and the double-layer steel pipe comes out. At the same time, as the hose clamp 4 moves and the expanded cold shrink hose shrinks, the support strip 23 exposed outside the hose clamp 4 is attached to the inner wall of the cold shrink hose and drives it to move together. When the hose clamp 4 is completely separated from the fixed support assembly 3, the support strip 23 is completely attached to the inner wall of the cold shrink hose, the hose clamp 4 is opened, and the expanded finished product 55 is taken out, as shown in FIG. Fig.15 As shown; since five expansion holes are arranged side by side along the axial direction on the braided sleeve bracket 31 in this embodiment, five cold shrink hoses can be expanded simultaneously in one process;
[0046] S9: Reinstall the new support bar 23 and the movable expansion guide 25, and repeat S2 to S8 to perform the next expansion process;
[0047] S10: After the expansion is completed, the mobile expansion component 2 moves in a direction away from the fixed support component 3.
Claims
1. A cold shrink hose expander, characterized in that: The invention comprises a fixed base and a mobile expansion component, a fixed support component, a movable hose clamp and a grabbing component which are sequentially arranged on the fixed base for expansion. The fixed support component is fixed on the fixed base and comprises a braided sleeve bracket. The braided sleeve bracket is provided with a plurality of expansion holes arranged side by side along the axial direction. The braided sleeve is fixed on the braided sleeve bracket. The mobile expansion component is slidably connected to the fixed base and is located at the front end of the fixed support component. The hose clamp and the grabbing component are sequentially slidably connected to the fixed base near the braided sleeve of the mobile expansion component. The hose clamp clamps the cold shrink hose to be expanded; the grabbing assembly includes a retractable pawl that can pass the cold shrink hose to be expanded on the hose clamp to the braided sleeve, and the retractable pawl can grab or release the braided sleeve; the movable expansion assembly includes a double-layer expansion steel tube, and the support bar is placed inside the expansion steel tube and extends out of the end of the expansion steel tube; the end of the expansion steel tube is movably connected with a conical movable expansion guide, and the movable expansion guide can be guided through the expansion hole and inserted into the braided sleeve, so as to support the braided sleeve and expand the cold shrink hose with expansion.
2. A cold shrink hose expander according to claim 1, characterized in that: The braided sleeve is fixed on the flange plate facing the expansion hole. Specifically, the braided sleeve is fixed on the flange plate by a clip, and the clip is a clamp.
3. The cold shrink hose expander according to claim 1, characterized in that: The movable expansion component is slidably connected to the fixed base through a movable slide rail and is located at the front end of the fixed support component. The movable expansion component includes an expansion steel tube movable support slidably connected to the fixed base. The expansion steel tube movable support is provided with a plurality of expansion holes 2 which are the same number and coaxial with the expansion holes. The expansion steel tube is inserted and fixed in the expansion hole 2. A support bar push rod is slidably connected inside the expansion steel tube. The support bar push rod is used to move the support bar along the axial direction of the expansion steel tube and push it until the end of the expansion steel tube is exposed.
4. The cold shrink hose expander according to claim 1, characterized in that: The double-layer expansion steel tube comprises an inner expansion tube and an outer expansion tube. The expansion tube is provided with a plurality of air guide grooves along the axial direction, and the air guide grooves are evenly distributed along the circumference of the expansion tube. The air guide grooves are provided with a plurality of air outlet holes, so that the air guide grooves are connected with the expansion inner tube and the expansion outer tube. An air inlet pipe is provided on the movable support of the expansion steel tube, and is connected with the expansion inner tube and the expansion outer tube. The gas enters between the expansion inner tube and the expansion outer tube from the air inlet at the top of the air inlet pipe, and is discharged from the air outlet holes on the expansion outer tube.
5. The cold shrink hose expander according to claim 1, characterized in that: The hose clamp comprises an upper die and a lower die which can be clamped up and down, and a plurality of semicircular holes are arranged side by side on opposite sides of the upper die and the lower die, and a circular expansion hole is formed after the upper and lower semicircular holes are clamped, which is the same number and coaxial with the expansion hole; first springs are arranged opposite to each other on the upper and lower dies, and a hose locking block is fixed at the end of the first spring, and a semicircular silicone tube fixing hole is formed at the end of the hose locking block, and the silicone tube fixing holes of the upper and lower hose locking blocks form a complete circular fixing hole after the mold is clamped, which is used to clamp the cold shrink hose to be expanded.
6. The cold shrink hose expander according to claim 5, characterized in that: A polyurethane layer is arranged on the inner side wall of a semicircular hole provided on one side opposite to the upper die and the lower die, and the outer diameter of the expanded steel pipe is greater than the inner diameter of the polyurethane layer.
7. The cold shrink hose expander according to claim 1, characterized in that: The grabbing assembly includes a sliding support that is slidably connected to a fixed base via a movable slide rail, and a cantilevered sleeve is arranged side by side on the sliding support close to the hose clamp. The sleeves are the same number and coaxial as the expansion holes; a sleeve introduction rod is slidably connected inside the sleeve, and a plurality of retractable ratchets are arranged at the front end of the sleeve introduction rod.
8. The cold shrink hose expander according to claim 7, characterized in that: The end of the sleeve away from the retractable pawl is fixed on the movable bracket, and the movable bracket is slidably connected to the slide rail of the sliding support; the movable bracket contacts the cam, and the cam is fixed to the output end of the motor; a second spring is arranged between the movable bracket and the sliding support, and the second spring and the cam are located on the same side; when the retractable pawl is in the retracted state, the retractable pawl is retracted in the sleeve, the highest point of the cam contacts the movable bracket, and the second spring is in an extended state.