Wire harness heat shrinking equipment, integrated device and method for multi-position synchronous heat shrinking

Abstract

The present invention discloses a wire harness heat shrinking device, an integrated device and a method for synchronous heat shrinking at multiple positions, and belongs to the field of automated wire harness generation equipment. The present invention can accurately heat shrink a wire harness having multiple heat shrink tubes through multiple groups of heating components, and can set parameters individually. Compared with the existing solutions on the market that only increase the covering size of the heating plate, it can ensure that different heat shrink tubes can be heat shrunk according to different process requirements; at the same time, it can avoid direct baking of the wire harness rubber. Therefore, the device as a whole is more energy-saving and environmentally friendly, and the device has strong adaptability to the size and process of the wire harness and high compatibility. The present invention can further add a spacing adjustment component to the heating component to achieve autonomous and convenient adjustment of the distance of the heating plate. Through this improvement, the optimal distance of the heating plate can be adjusted according to the maximum outer diameter of different wire harnesses, so that the effect of the heat shrink tube absorbing heat reaches the best state, thereby achieving more efficient heat shrinkage of the heat shrink tube.

Description

Technical Field

[0001] The invention belongs to the field of heat shrinkage automation equipment for heat shrinkable tubes in wire harness production, and specifically relates to a heat shrinkage automation equipment for completing heat shrinkage protection at one time for a wire harness end having one or more heat shrinkable tubes. Background Art

[0002] In the field of wire harness production, in actual production, one or several wires (or metal terminals) are connected together through peeling, welding, riveting and other processes to form the finished wire harness required by the customer. In this process, the connections between wires and wires, wires and metal terminals, etc. need to be protected to achieve insulation and other purposes. Heat shrink tubing is an important and common protection method used in this link, and it also has a bundling effect. The heat shrink position of the heat shrink tubing is at one end or near one end of the wire, which is called end heat shrinkage in the industry. For example, after the wire harness and metal terminal are welded or riveted, heat shrink tubing is required for heat shrink protection.

[0003] There are many types of wire harnesses mentioned above. With the development of society, wire harnesses for various emerging fields are constantly emerging. For example, with the vigorous development of new energy vehicles, many new requirements are put forward for wire harness manufacturers in terms of technology and equipment. Comprehensively summarizing the characteristics of various wire harnesses, the heat shrink process is summarized as follows: the cross-section changes greatly, and there are multiple heat shrink tubes near the end of a wire harness (see Figure 1 ), and the heat shrink process requirements of multiple heat shrink tubes here are different.

[0004] Based on the above characteristics, the existing heat shrink tubing equipment cannot meet or realize all the needs of wire harness manufacturers, and each wire harness manufacturer also hopes that the heat shrink tubing and heat shrink equipment manufacturers can help solve their pain points. However, from the current situation, the equipment manufacturers only use means such as increasing the size of the heating plate of the original product to achieve the function. Since the design has not been fundamentally changed, its equipment cannot fully meet the heat shrink process requirements of the product, nor can it completely solve the customer's pain points, and it will cause customers to frequently customize heat shrink tubing machines for wire harnesses of different specifications.

[0005] In view of the characteristics of heat shrinkage of heat shrink tubing on the above-mentioned wiring harness, some of the technical problems that need to be solved urgently are as follows:

[0006] a. The cross-section of wire harnesses for different purposes varies greatly: the cross-sectional area of ​​the wire harness core in the conventional field is 0.5mm 2 -120mm 2 The cross-sectional area of ​​the copper core of the high-voltage wire used in the charging pile field can reach 240mm 2, or even more. Due to the large cross-sectional area span of the heat shrink object, for example, from the perspective of efficiency and energy saving, it is necessary to be able to easily adjust the distance between the upper and lower heating plates. When the heat shrink object is a small cross-sectional wire harness, the distance between the upper and lower heat sources is adjusted to a small cross-sectional wire harness; when the heat shrink object is a large cross-sectional wire harness, the distance between the upper and lower heat sources is adjusted to a large cross-sectional wire harness to avoid inappropriate power dissipation.

[0007] b. According to the actual processing requirements, the end of a wire harness generally has two heat shrink tubes: one is used to protect the joint between the wire harness body and the metal end, and the other is used to fix the wire harness body and the corrugated tube, but the actual production is not limited to the above-mentioned usage methods. Generally, the position of the head heat shrink tube a is relatively fixed, and the position of the second heat shrink tube b varies greatly; and the two heat shrink tubes are different, and their heat shrink processes are different. According to the manufacturing process of the wire harness, the rubber of the wire harness should be kept away from baking on the heating plate to avoid aging or damage.

[0008] Therefore, it is urgent to propose a new type of heat shrink tube machine that can realize multi-position synchronous heat shrinkage. Summary of the invention

[0009] The purpose of the present invention is to solve the problems existing in the prior art and provide a wire harness heat shrinking device with multi-position synchronous heat shrinking

[0010] The specific technical solutions adopted by the present invention are as follows:

[0011] A wire harness heat shrinking device with multi-position synchronous heat shrinking, comprising a wire harness fixing mechanism, a heat shrink tube heating mechanism and an overall driving mechanism;

[0012] The wire harness fixing mechanism is used to fix the wire harness to be heat-shrinkable;

[0013] The integral driving mechanism is used to drive the wire harness fixing mechanism and the heat shrink tube heating mechanism to move relative to each other, so that the wire harness to be heat shrunk fixed on the wire harness fixing mechanism enters and exits the heating area of ​​the heat shrink tube heating mechanism;

[0014] The heat shrink tube heating mechanism is provided with at least two groups of heating components, and the two groups of heating components are arranged at intervals along the extension direction of the wire harness to be heat shrunk, so that the heating action positions of different heating components on the wire harness to be heat shrunk are different; at least one group of heating components is provided with a position adjustment component, which is used to drive the group of heating components to move relative to the other heating components along the extension direction of the wire harness to be heat shrunk, so as to independently change the heating action position of the group of heating components on the wire harness to be heat shrunk.

[0015] Preferably, the temperature of each group of heating components is independently controlled.

[0016] Preferably, each group of heating components includes a first heating element and a second heating element respectively arranged on both sides of the wire harness to be heat shrunk, for partially performing bidirectional heating and heat shrinking on the heat shrinkable tube on the wire harness to be heat shrunk.

[0017] Furthermore, at least one group of the heating components is provided with a spacing adjustment component, and the spacing adjustment component is used to adjust the distance between the first heating element and the second heating element relative to the wire harness to be heat shrunk.

[0018] Furthermore, the spacing adjustment assembly includes a first nut, a second nut, a lifting rod and a guide shaft; the first nut and the second nut are respectively installed on the mounting seats of the first heating element and the second heating element; the thread rotation directions of the first nut and the second nut are opposite, and the lifting rod is a bidirectional screw rod, and the lifting rod and the first nut and the second nut respectively form a threaded fit, which is used to drive the first heating element and the second heating element to synchronously approach or synchronously move away from the wire harness to be heat shrunk fixed on the wire harness fixing mechanism; the guide shaft is arranged parallel to the lifting rod, and is used to guide and limit the mounting seats of the first heating element and the second heating element.

[0019] Preferably, the first heating element and the second heating element are both heating plates, and are respectively located above and below the wire harness to be heat shrunk.

[0020] Preferably, the harness fixing mechanism is provided with a plurality of side-by-side fixing members for simultaneously fixing a plurality of side-by-side harnesses to be heat shrunk; and the heating area of ​​the heating component in the heat shrink tube heating mechanism simultaneously covers a plurality of harnesses to be heat shrunk.

[0021] Preferably, there are two groups of heating components, and one group of heating components is relatively fixed on the frame of the heat shrink tube heating mechanism, and the other group of heating components slides relative to the frame through the position adjustment component. The two groups of heating components are respectively used to heat the two heat shrink tubes on the heat shrinkable wire harness to be heated.

[0022] Preferably, the adjustment range of the heating component by the position adjustment component satisfies that: the heating area scanning range of the adjusted heating component during the adjustment process covers the span range of the heat shrinkable tube to be heated on the wire harness to be heat shrunk.

[0023] Preferably, the wiring harness fixing mechanism is fixed in position, and the heat shrink tube heating mechanism moves relative to the wiring harness fixing mechanism under the drive of the overall driving mechanism.

[0024] Another object of the present invention is to provide a heat shrinking integrated device for multi-position synchronous heat shrinking, which comprises one or more workstations, and each workstation is provided with a wire harness heat shrinking device as described in any of the above schemes;

[0025] Another object of the present invention is to provide a wire harness heat shrinking processing method using the wire harness heat shrinking device described in any of the above schemes, wherein the wire harness has a plurality of heat shrinkable tubes to be heat shrunk, and the specific method is as follows:

[0026] S1: placing the wiring harness fixing mechanism in an initial position outside the heat shrink tube heating mechanism;

[0027] S2: adjusting the spacing of the multiple groups of heating components inside the heat shrink tube heating mechanism by the position adjustment component so that the spacing matches the positions of the multiple heat shrink tubes on the wire harness to be heat shrunk;

[0028] S3: fixing the wire harness to be heat shrunk which is pre-covered with a heat shrink tube on the wire harness fixing mechanism, and driving the wire harness fixing mechanism and the heat shrink tube heating mechanism to move relative to each other through the overall driving mechanism, so that the wire harness to be heat shrunk fixed on the wire harness fixing mechanism enters the heating area of ​​the heat shrink tube heating mechanism, and the multiple heat shrink tube positions on the wire harness to be heat shrunk are respectively located in the heating areas of multiple groups of heating components that have been preheated to the target temperature;

[0029] S4: using multiple sets of heating components in the heat shrink tube heating mechanism to simultaneously perform heat shrink treatment on multiple heat shrink tubes on the heat shrink wire harness;

[0030] S5: After the heat shrinking process is completed, the wiring harness fixing mechanism and the heat shrink tube heating mechanism are driven by the overall driving mechanism to move in opposite directions, so that the wiring harness to be heat shrunk moves out of the heat shrink tube heating mechanism and returns to the initial position, thereby completing the wiring harness heat shrinking process.

[0031] Preferably, before performing step S3, the distance between the first heating element and the second heating element relative to the wire harness to be heat shrunk is adjusted in advance by the distance adjustment component so as to meet the requirements of heat shrinkage treatment;

[0032] Preferably, during the heat shrinking process of step S4, when the length of the heat shrinkable tube on the wire harness to be heat shrunk is too long and the heating component cannot complete the heat shrinking process at one time, the adjusting component drives the heating component above it to move along the extension direction of the wire harness to be heat shrunk, and the heating action position of the group of heating components on the wire harness to be heat shrunk is continuously changed, so that the heat shrinking process of the entire heat shrinkable tube is completed.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1) The present invention can accurately shrink the wire harness with multiple heat shrink tubes through multiple groups of heating components, and the parameters can be set separately. Compared with the existing solutions on the market that only increase the size of the heating plate, it can ensure that different heat shrink tubes can be shrunk according to different process requirements; at the same time, it can avoid direct baking of the wire harness rubber. Therefore, the overall equipment is more energy-saving and environmentally friendly, and the equipment has strong adaptability to the size and process of the wire harness and high compatibility.

[0035] 2) The present invention can further add a spacing adjustment component to the heating assembly to achieve autonomous and convenient adjustment of the distance L of the heating plates. It provides an autonomous and convenient way to achieve more energy-saving and higher efficiency in actual factory production. Through this improvement, the optimal distance of the heating plates can be adjusted according to the maximum outer diameter of different wiring harnesses, so that the heat shrink tube can absorb heat in the best state, thereby achieving more efficient heat shrinkage of the heat shrink tube and more energy-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the wiring harness structure;

[0037] Figure 2 It is a schematic diagram of the heat shrink structure of the heat shrink tube on the wire harness by the enlarged size heating plate on the existing heat shrink equipment;

[0038] Figure 3 It is a schematic diagram of the overall structure of a wire harness heat shrinking device for multi-position synchronous heat shrinking;

[0039] Figure 4 It is a schematic diagram of the heat shrink tube heating mechanism of the device moving as a whole to the heat shrink position. Both sides are independent and can be moved separately;

[0040] Figure 5 It is a schematic diagram of the two sets of heating components of the wire harness heat shrinking device independently shrinking the heat shrink tubes a and b;

[0041] Figure 6 It is a schematic diagram of a group of heating components in the wire harness heat shrinking device being adjusted left and right according to the position of the heat shrink tube b;

[0042] Figure 7 This is a schematic diagram showing that the wire harness heat shrink device can adjust the distance between two pairs of heating plates up and down according to the cross-sectional area of ​​the wire harness;

[0043] Figure 8 It is a schematic diagram of a mechanism for adjusting the distance L between the heating plates of the wiring harness heat shrinking device;

[0044] Fig. 9 This is a schematic diagram of the wiring harness heat shrink device adjusting the horizontal position of the outer heating component

[0045] Fig.10This is a schematic diagram of the wire harness heat shrinking device that only allows one set of heating components to work according to the actual heat shrinking process;

[0046] The reference numerals in the figure are: metal terminal 001, corrugated tube 002, heat shrink tube heating mechanism 101, wire harness fixing mechanism 102, wire harness to be heat shrunk 103, first heating element 201, second heating element 202, heat shrink tube a203, heat shrink tube b204, wire harness body rubber 205, enlarged heating plate 206, frame column 207, heating plate mounting seat 208, guide shaft 209, guide shaft fixing seat 210, linear bearing 211, fixing block 212, lifting rod 213, first nut 214, second nut 215, air duct cover 216, moving screw 217, moving nut 218, and four-corner head A of moving screw. DETAILED DESCRIPTION

[0047] The present invention is further described and illustrated below in conjunction with the accompanying drawings and specific embodiments. The technical features of each embodiment of the present invention can be combined accordingly without conflicting with each other.

[0048] like Figure 1 As shown, for ease of understanding, a wire harness structure to be heat-shrunk is shown, which is a common form in new energy vehicles. In this wire harness, one end is a metal terminal 001, which is combined with one end of the wire harness body, and the other end of the wire harness body is connected and fixed with a corrugated tube 002. Therefore, in this wire harness, two heat shrink tubes are generally required along the wire harness: one heat shrink tube a203 is used for protection of the junction between the wire harness body and the metal terminal 001, and the other heat shrink tube b204 is used for fixed protection of the junction between the wire harness body and the corrugated tube 002. Therefore, when this wire harness is heat-shrunk, it is necessary to perform multi-position synchronous heat shrinkage.

[0049] In current wire harness heat shrink processing equipment, two upper and lower heating plates are usually used to heat shrink the wire harness. However, the heating area of ​​the heating plate itself is limited. If the distance between heat shrink tube a and heat shrink tube b is too large, then the area of ​​the heating plate needs to be increased to solve the problem of insufficient heating area. Figure 2As shown, it is a device form for heat shrinking processing of such a wire harness with multi-position synchronous heat shrinking requirements. It uses two enlarged heating plates 206, that is, the areas of the upper and lower heating plates are enlarged, so that the heating area (i.e., the wavy line filling area in the figure) is expanded to be able to simultaneously wrap the heat shrink tube a203 and the heat shrink tube b204 on the wire harness. However, under this practice, since the area of ​​the two enlarged heating plates 206 is too large, its energy consumption is also proportionally increased, and the economy is poor. Moreover, what is more serious is that since the outside of the wire harness body of such wire harness is generally wrapped with the wire harness body rubber 205, the wire harness body rubber 205 is prone to adverse reactions such as aging and ablation at high temperatures, affecting the safety of the wire harness itself. Furthermore, the size of the heat shrink tube continues to increase with the development of technology. When the heating area of ​​the equipment cannot meet the requirements, it is necessary to customize the equipment of a larger size heating plate, and the update cost is too high for users.

[0050] In order to solve the technical problem and meet the requirements of heat shrinkage of wire harnesses of different specifications, a wire harness heat shrinkage device with multi-position synchronous heat shrinkage is provided in a preferred embodiment of the present invention, such as Figure 3 As shown, the main structure is divided into two stations, and one operator can perform dual-station operations at the same time. When one station is performing heat shrink treatment, the other station is clamping the wire harness, so as to save labor costs. The internal structure of each station is the same, mainly including three parts: a wire harness fixing mechanism 102, a heat shrink tube heating mechanism 101 and an overall driving mechanism.

[0051] The harness fixing mechanism 102 is used to fix the harness to be heat-shrunk 103. The specific fixing form of the harness fixing mechanism 102 is not limited, as long as the harness to be heat-shrunk 103 can be detachably fixed. Figure 1 The wire harness shown has a metal terminal 001 at its end, so the wire harness fixing mechanism 102 can use a wire harness placement station plate to fix the wire harness. A metal pin that matches the mounting hole on the metal terminal 001 is set at one end of the wire harness placement station plate. The metal terminal 001 can be directly clamped on the metal pin, and the end of the corrugated tube 002 of the wire harness 103 to be heat shrunk can be fixed through the semicircular clamping groove on the wire harness placement station plate. In this embodiment, considering the efficiency of the heat shrinking process, a plurality of side-by-side fixed positions will be set on the wire harness fixing mechanism 102 to simultaneously fix a plurality of side-by-side wire harnesses 103 to be heat shrunk. The heating area of ​​the heating component in the heat shrink tube heating mechanism 101 can cover a plurality of wire harnesses 103 to be heat shrunk at one time, so as to realize batch heat shrinking. Of course, it is also completely feasible to fix only a single wire harness 103 to be heat shrunk on the wire harness fixing mechanism 102, and there is no restriction.

[0052] The heat shrink tube heating mechanism 101 in the present invention mainly provides heat for the heat shrink tube, and the function of the overall driving mechanism is to drive the wire harness fixing mechanism 102 and the heat shrink tube heating mechanism 101 to move relative to each other, so that the wire harness 103 to be heat-shrunk fixed on the wire harness fixing mechanism 102 can enter and exit the heating area of ​​the heat shrink tube heating mechanism 101. When it is necessary to disassemble the wire harness 103 to be heat-shrunk, keep the wire harness on the wire harness fixing mechanism 102 outside the heat shrink tube heating mechanism 101 for easy operation, such as Figure 3 When the heat shrinkable wire harness 103 needs to be heated, it is necessary to move it into the heat shrink tube heating mechanism 101 so that the heat shrink tube is located in the heating area of ​​the heat shrink tube heating mechanism 101, such as Figure 4 As shown. There are many forms of the overall driving mechanism, including linear modules, screw slider assemblies, cylinders and slide rails, all of which can achieve the driving function. Moreover, the overall driving mechanism can drive the wire harness fixing mechanism 102 to move so that the heat shrink tube heating mechanism 101 remains fixed, or it can drive the heat shrink tube heating mechanism 101 to move and keep the wire harness fixing mechanism 102 fixed, as long as the two move relative to each other. In this embodiment, since the wire harness is long, it is preferred to keep the wire harness fixing mechanism 102 fixed and move the heat shrink tube heating mechanism 101.

[0053] The present invention is relative to Figure 2 The core difference between traditional heat shrink equipment and traditional heat shrink equipment is that the heating components are divided into zones. Figure 5 The figure shows the principle diagram of the heating components inside the device and the wire harness 103 to be heat-shrunk. Please note that: Figure 5 The wiring harness fixing mechanism 102 and the supporting structure of the heating assembly are simplified, mainly for explaining the principle. Figures 6 to 8 The same applies. Two groups of heating components are provided in the heat shrinkable tube heating mechanism 101. In the present embodiment, each group of heating components includes a first heating element 201 and a second heating element 202 respectively arranged on both sides of the wire harness 103 to be heat shrunk, which are used to perform bidirectional heating and shrinking of the heat shrinkable tube on the wire harness 103 to be heat shrunk, thereby improving the uniformity of heating. In the present embodiment, the first heating element 201 and the second heating element 202 are heating plates, and the two are respectively located above and below the wire harness 103 to be heat shrunk. Of course, it can also be replaced with other heating elements that can heat the heat shrinkable tube. At the same time, the first heating element 201 and the second heating element 202 can also be located on the left and right sides of the wire harness 103 to be heat shrunk, as long as the heating processing interface of the heat shrinkable tube can be realized, but at this time, the structural form of the remaining components should also be adaptively adjusted.

[0054] Figure 5The two groups of heating components are arranged at intervals along the extension direction of the wire harness 103 to be heat shrunk, so that after the wire harness 103 to be heat shrunk is moved into the heat shrink tube heating mechanism 101, the heating action positions of different heating components on the wire harness 103 to be heat shrunk are different. The wavy line filled area in the figure represents the heating area range of the heating component. Therefore, when the two heat shrink tubes are respectively located under their corresponding heating components, they can complete the heat shrinking process, but the rubber skin 205 of the wire harness body in the middle will not be damaged by high temperature. Moreover, since only two heat shrink tube positions need to be heated, the heating area range of a single heating component is also relatively Figure 2 It will be greatly reduced and the overall energy consumption will be lower.

[0055] In addition, since the position of the heat shrink tube on different wiring harnesses is different, and the length of the heat shrink tube is also different, Figure 5 The central partition type heating assembly may fail to meet the heat shrinkage processing requirements of different heat shrink tubes. In order to solve this problem, the present invention can add a position adjustment assembly to one of the heating assemblies. Figure 6 As shown, the function of the position adjustment component is to drive the group of heating components to move relative to other heating components along the extension direction of the wire harness 103 to be heat shrunk, and the direction of the arrow in the figure indicates the moving direction of the heating component on the right. During the movement of the heating component, the position of its heating action on the wire harness 103 to be heat shrunk will also gradually change. Thus, when the spacing between the heat shrink tube a and the heat shrink tube b on the wire harness 103 to be heat shrunk is too large or too small, the spacing between the two groups of heating components can be directly adjusted by the position adjustment component to adapt to the spacing between the two heat shrink tubes. The implementation form of the position adjustment component is diverse, and in theory it can be implemented by any device that can accurately output the drive displacement, such as a cylinder, a linear module, a robotic arm, etc. In order to ensure the uniformity of heating, the first heating element 201 and the second heating element 202 in the same group of heating components generally need to ensure synchronous movement.

[0056] In the heat shrink tube heating mechanism 101, both groups of heating components can be provided with position adjustment components for adjustment, or one of the groups can be selected to add a position adjustment component as needed. Generally speaking, in the existing wiring harnesses on the market, the position of the head heat shrink tube a is relatively fixed, and the position of the second heat shrink tube b varies greatly. Therefore, in this embodiment, it is preferred to set one group of heating components to be relatively fixed on the frame of the heat shrink tube heating mechanism 101, and the other group of heating components slides relative to the frame through the position adjustment component. When the two groups of heating components are in use, the fixed heating component is used to heat the heat shrink tube a, and the movable heating component is appropriately adjusted according to the position of the heat shrink tube b, so that the heat shrink tube b can be heated by the other group of heating components at the same time.

[0057] in addition, Figure 6In addition to being able to adapt to different heat shrink tube spacings, the position adjustment component shown can also solve the problem of excessive length of the heat shrink tube on some wiring harnesses. For example, when the length of the heat shrink tube b204 is greater than the span of the heating area of ​​the first heating element 201 and the second heating element 202, the conventional technology needs to increase the size of the first heating element 201 and the second heating element 202 to make the heating area larger. However, when the position adjustment component is provided on the heating component, the problem can be solved by continuously adjusting the positions of the first heating element 201 and the second heating element 202 during the heat shrinking process. Referring to the same 6, the specific method is to first make the left end of the heating area of ​​the first heating element 201 and the second heating element 202 cover the left end of the heat shrink tube b204, so that the left end of the heat shrink tube b204 is heated, and then control the first heating element 201 and the second heating element 202 to move to the right synchronously, and gradually heat the rest of the heat shrink tube b204 until the right end of the heat shrink tube b204 is covered. The movement of the first heating element 201 and the second heating element 202 can be unidirectional with a fixed step length or reciprocatingly moved according to the needs of heat shrinkage. Therefore, the present invention can realize the processing of heat shrink tubes of different lengths without customizing additional equipment.

[0058] For ease of description, in the present invention, the range of the heating area swept by the first heating element 201 and the second heating element 202 during the movement is defined as the heating area scanning range. Of course, it should be noted that if this scanning heat shrinking process is to be implemented, the position adjustment range of the position adjustment component for the heating component should meet the following conditions: the heating area scanning range of the adjusted heating component during the adjustment process covers the span range of the heat shrink tube to be heated on the heat shrink wire harness 103, that is, the entire heat shrink tube under the heating component can be heated. In order to ensure the stability of the heat shrinking process, in general, the heating area scanning range should be slightly larger than the span range of the heated heat shrink tube.

[0059] In addition, in the actual production process, the cross-section of wire harnesses for different purposes varies greatly. The cross-sectional area of ​​the wire core in the conventional field is 0.5mm 2 ~120mm 2 The cross-sectional area of ​​the copper core of the high-voltage wire used in the charging pile field can reach 240mm 2 , or even larger. Since the cross-sectional area of ​​the heat shrinkable object varies widely, from the perspective of efficiency and energy saving, the heating element in the heating assembly needs to be able to easily adjust the distance from the wiring harness. When the heat shrinkable object is a small-section wiring harness, the distance between the upper and lower heat sources is reduced to adapt to the small-section wiring harness; when the heat shrinkable object is a large-section wiring harness, the distance between the upper and lower heat sources is increased to adapt to the large-section wiring harness. In this way, improper power dissipation can be avoided. In the prior art, most heating assemblies are fixed directly at the factory and cannot achieve the spacing adjustment function. Therefore, in Figure 5On the basis of 6, a spacing adjustment component can also be provided on the heating component to adjust the distance between the first heating element 201 and the second heating element 202 relative to the wire harness 103 to be heat shrunk. Since there are multiple groups of heating components, which group of heating components needs to be provided with the spacing adjustment component can be determined according to the actual process requirements. If the size of the heat shrink tube at a certain position is basically constant, then the heating element used to heat the heat shrink tube at this section does not need to be provided with a spacing adjustment component. However, in general, the cross-sections of the wire harness at different positions are proportionally changed. Therefore, in this embodiment, if Figure 7 As shown, it is preferred to set a spacing adjustment component on both sets of heating components to meet the needs of users to independently and conveniently adjust the distance L between the upper and lower heating plates.

[0060] There are many forms of spacing adjustment components. Theoretically, any driving mechanism that can output displacement can be used, such as a linear module, a cylinder, etc. As a preferred embodiment of the present invention, this embodiment provides a form that can achieve the same speed and synchronous movement of the first heating element 201 and the second heating element 202 to ensure the synchronization of the heating adjustment of the wire harness. Figure 8As shown, the spacing adjustment assembly includes a first nut 214, a second nut 215, a lifting rod 213 and a guide shaft 209. The first nut 214 and the second nut 215 are respectively mounted on the mounting seats 208 of the first heating element 201 and the second heating element 202. The lifting rod 213 and the guide shaft 209 are mounted on the frame of the heat shrink tube heating mechanism 101. In the entire frame, a frame column 207 is provided on each side, and the first heating element 201 and the second heating element 202 are arranged parallel between the two frame columns 207. The first heating element 201 and the second heating element 202 are each fixed on the heating plate mounting seat 208. The area between the first heating element 201 and the second heating element 202 serves as the entry and exit and heating area of ​​the wire harness. The first heating element 201 heats the heat shrink tube of the wire harness from the top, and the second heating element 202 heats the heat shrink tube of the wire harness from the bottom. Since high temperature will be generated during the heating process, an air duct is arranged above the first heating element 201, and a fan is arranged on the air duct cover 216 at the top of the air duct for heat dissipation. The frame column 207 is combined with the air duct cover 216 to form a frame for fixing other components, and a guide seat 210 is fixed on the frame column 207. The linear bearing 211 is fixed on the heating plate mounting seat 208 and can slide up and down on the guide shaft 210, so that the upper and lower heating plate mounting seats 208 guarantee a degree of freedom in the Z-axis direction to prevent deviation. The first nut 214 and the second nut 215 have opposite thread rotation directions, the first nut 214 is a left-handed nut, and the second nut 215 is a right-handed nut. The right-handed nut and the left-handed nut are respectively fixed on their respective heating plate mounting seats 208. The lifting rod 213 is also a bidirectional screw, which is opposite to the thread rotation direction of the right-handed nut and the left-handed nut assembly position. The bidirectional screw can tap two sections of reverse threads at the nut assembly position, or it can be realized by using a positive and negative thread screw. The lifting rod 213 and the first nut 214 and the second nut 215 respectively form a threaded fit, so that under the rotation of the lifting rod 213, the first nut 214 and the second nut 215 are driven to move synchronously toward the middle, or synchronously toward the two sides, thereby driving the first heating element 201 and the second heating element 202 to synchronously approach or synchronously move away from the heat-shrinking wire harness 103 fixed on the wire harness fixing mechanism 102. Therefore, the upper and lower heating plate mounting seats 208 can be adjusted to a smaller size L or larger size L in the same direction, and the moving distances are guaranteed to be equal. The fixing block 212 is installed on the air duct cover 216 to fix the Z-axis rotation freedom of the lifting screw of the fixing member 212. After the upper and lower heating source center distance L is adjusted, the Z-axis rotation freedom of the lifting rod 213 is limited by the fixing block 212. After the upper and lower heating source center distance L is fixed, it will not move during the movement of the heating component. The guide shaft 209 is arranged in parallel with the lifting rod 213 , and can guide and limit the mounting base 208 of the first heating element 201 and the second heating element 202 .

[0061] In order to adapt to the Figure 8 The device frame shown in the figure can be driven by a screw. Fig. 9 As shown, a moving screw 217 can be installed on the frame, and then a moving nut 218 can be fixed on the side of the first heating element 201. The moving nut 218 and the moving screw 217 form a threaded fit. When the moving screw 217 rotates, the moving nut 218 can drive the first heating element 201 to move. The other side of the first heating element 201 can be moved synchronously through a slide rail, or another set of moving nuts 218 and the moving screw 217 can be set to drive. The moving screw 217 can be rotated manually, and the four-corner head A of the moving screw needs to extend out of the frame. Of course, the moving screw 217 can also be driven by a motor. Since the first heating element 201 and the second heating element 202 generally need to ensure synchronous movement, the second heating element 202 can be connected to the first heating element 201 through a rigid connecting rod to achieve synchronous movement, or a driving component can be set separately.

[0062] Based on the above-mentioned wire harness heat shrinking device, the present invention further provides a wire harness heat shrinking processing method. Figure 1 Taking the wiring harness with two heat shrink tubes to be heat shrunk as an example, the processing process is as follows:

[0063] S1: The harness fixing mechanism 102 is placed in the initial position outside the heat shrink tube heating mechanism 101 through the overall driving mechanism, that is, the harness fixing mechanism 102 is kept in the initial position outside the heat shrink tube heating mechanism 101. Figure 3 Status shown.

[0064] S2: The distance between the two sets of heating components inside the heat shrink tube heating mechanism 101 is adjusted by the position adjustment component so that the distance matches the positions of the two heat shrink tubes on the wire harness 103 to be heat shrunk. The so-called position matching means that when the wire harness 103 to be heat shrunk enters the heating area of ​​the heat shrink tube heating mechanism 101, the positions of the two heat shrink tubes on the wire harness 103 to be heat shrunk can be located in the heating areas of the two sets of heating components, thereby achieving heat shrinkage of the heat shrink tubes.

[0065] S3: First, the heat shrink tube is pre-covered at the target position of the wire harness 103 to be heat shrunk, and then the wire harness 103 to be heat shrunk covered with the heat shrink tube is fixed on the wire harness fixing mechanism 102, and the wire harness fixing mechanism 102 and the heat shrink tube heating mechanism 101 are driven by the overall driving mechanism to move relative to each other, so that the wire harness 103 to be heat shrunk fixed on the wire harness fixing mechanism 102 enters the heating area of ​​the heat shrink tube heating mechanism 101, and the two heat shrink tube positions on the wire harness 103 to be heat shrunk are both located in the heating areas of the two sets of heating components, forming Figure 4 Status shown.

[0066] According to the needs of the heat shrink process, before the heat shrinkable wire harness 103 enters the heat shrinkable tube heating mechanism 101, the heating component in the heat shrinkable tube heating mechanism 101 needs to be preheated to the target temperature. In actual use, the operating temperature and heat shrink time of each heating component can be set through the control interface of the heating board, and then the heating program of the heating component can be started. Each heating component starts to heat up, and after all heating components reach the set temperature, the equipment can enter the working state. Therefore, this preheating process can be considered to be completed before wiring.

[0067] S4: After the heat shrinkable wire harness 103 enters the preheated heat shrinkable tube heating mechanism 101 , the two groups of heating components in the heat shrinkable tube heating mechanism 101 can simultaneously perform heat shrinkage treatment on the two heat shrinkable tubes on the heat shrinkable wire harness 103 .

[0068] It should be noted that during the heat shrinking process in step S4, when the length of the heat shrinkable tube on the wire harness 103 to be heat shrunk is too long and the heating component cannot complete the heat shrinking process at one time, the aforementioned method can be followed by driving the heating component above it to move along the extension direction of the wire harness 103 to be heat shrunk by adjusting the component, and by continuously changing the heating action position of the group of heating components on the wire harness 103 to be heat shrunk by means of thermal scanning, so that the entire heat shrinkable tube completes the heat shrinking process.

[0069] S5: After the heat shrinking process is completed, the harness fixing mechanism 102 and the heat shrink tube heating mechanism 101 are driven by the overall driving mechanism to move in opposite directions, so that the heat shrinking harness 103 to be heat shrunk moves out of the heat shrink tube heating mechanism 101 and returns to the initial position, completing the heat shrinking process of the harness. The heat shrinking harness 103 to be heat shrunk is removed, and the corresponding processing process is completed.

[0070] It should be noted that if the distance between the upper and lower heating plates in the current heating assembly is not suitable for the size of the wire harness 103 to be heat shrunk, then before step S3, the distance between the first heating element 201 and the second heating element 202 relative to the wire harness 103 to be heat shrunk needs to be adjusted in advance by the distance adjustment assembly so that it meets the requirements of the heat shrinking process. The specific distance value can be adjusted according to the set parameters of the process.

[0071] In addition, in the above embodiment, when there are multiple sets of heating components, their temperature control is preferably independent of each other. Therefore, when there are differences in the heat shrinking processes of two different heat shrink tubes, the heat shrinking temperatures of each heat shrink tube can be set according to the corresponding heat shrinking processes. A K-type thermocouple can be installed on one of the upper and lower heating elements to detect its temperature and realize feedback regulation.

[0072] In addition, in other embodiments, the above-mentioned wire harness heat shrinking device can also be used to perform heat treatment on a wire harness having only one heat shrink tube. Fig.10At this time, you only need to turn on one of the heating components, and the other heating component can remain turned off.

[0073] In the above embodiment, a heat shrink integrated device with two workstations for multi-position synchronous heat shrinkage is shown, but in other embodiments, the specific number of workstations can be adjusted as needed and can be one or more. However, each workstation should be provided with a wire harness heat shrink device as described above. When there are multiple workstations, their control systems can be unified or independent. Each driving component in the heat shrink integrated device, such as a position adjustment component, a spacing adjustment component, an overall drive mechanism, etc., can be connected to the control system for unified automatic control.

[0074] In the above embodiment, two groups of heating components are provided in the wire harness heat shrinking device in a single workstation, but in other embodiments, more heating components can be provided according to the specific number of heat shrink tubes on the wire harness, and the basic principle is the same.

[0075] The above-described embodiment is only a preferred solution of the present invention, but it is not intended to limit the present invention. A person skilled in the relevant technical field may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present invention.

Claims

1. A wire harness heat shrinking device for multi-position synchronous heat shrinking, characterized in that: It comprises a wire harness fixing mechanism (102), a heat shrink tube heating mechanism (101) and an overall driving mechanism; The wire harness fixing mechanism (102) is used to fix the wire harness to be heat-shrunk (103); The integral driving mechanism is used to drive the wire harness fixing mechanism (102) and the heat shrink tube heating mechanism (101) to move relative to each other, so that the wire harness to be heat shrunk (103) fixed on the wire harness fixing mechanism (102) enters and exits the heating area of ​​the heat shrink tube heating mechanism (101); The heat shrink tube heating mechanism (101) is provided with at least two groups of heating components, and the two groups of heating components are arranged at intervals along the extension direction of the wire harness (103) to be heat shrunk, so that the heating action positions of different heating components on the wire harness (103) to be heat shrunk are different; at least one group of heating components is provided with a position adjustment component, which is used to drive the group of heating components to move along the extension direction of the wire harness (103) to be heat shrunk relative to the other heating components, so as to independently change the heating action position of the group of heating components on the wire harness (103) to be heat shrunk.

2. The wire harness heat shrinking device for multi-position synchronous heat shrinking according to claim 1, characterized in that: Each group of heating components comprises a first heating element (201) and a second heating element (202) respectively arranged on both sides of the wire harness (103) to be heat shrunk, and is used to partially perform bidirectional heating and heat shrinking on the heat shrink tube on the wire harness (103) to be heat shrunk; at least one group of the heating components is provided with a spacing adjustment component, and the spacing adjustment component is used to adjust the distance between the first heating element (201) and the second heating element (202) relative to the wire harness (103) to be heat shrunk.

3. The wire harness heat shrinking device for multi-position synchronous heat shrinking according to claim 2, characterized in that: The temperature of each group of heating components is independently controlled.

4. The wire harness heat shrinking device for multi-position synchronous heat shrinking according to claim 2, characterized in that: The spacing adjustment assembly comprises a first nut (214), a second nut (215), a lifting rod (213) and a guide shaft (209); the first nut (214) and the second nut (215) are respectively mounted on the mounting seats (208) of the first heating element (201) and the second heating element (202); the first nut (214) and the second nut (215) have opposite thread rotation directions, the lifting rod (213) is a bidirectional screw rod, and the lifting rod (213) and the first nut (214) and the second nut (215) respectively form threaded cooperation, and are used to drive the first heating element (201) and the second heating element (202) to synchronously approach or synchronously move away from the to-be-heat-shrinked wire harness (103) fixed on the wire harness fixing mechanism (102); the guide shaft (209) is arranged in parallel with the lifting rod (213), and is used to guide and limit the mounting seats (208) of the first heating element (201) and the second heating element (202).

5. The wire harness heat shrinking device for multi-position synchronous heat shrinking according to claim 2, characterized in that: The first heating element (201) and the second heating element (202) are both heating plates, and are respectively located above and below the wire harness (103) to be heat shrunk.

6. The wire harness heat shrinking device for multi-position synchronous heat shrinking according to claim 1, characterized in that: The harness fixing mechanism (102) is provided with a plurality of parallel fixing members for simultaneously fixing a plurality of parallel harnesses (103) to be heat shrunk; and the heating area of ​​the heating component in the heat shrink tube heating mechanism (101) simultaneously covers the plurality of harnesses (103) to be heat shrunk.

7. The wire harness heat shrinking device for multi-position synchronous heat shrinking according to claim 1, characterized in that: There are two groups of heating components, one of which is relatively fixed on the frame of the heat shrink tube heating mechanism (101), and the other group of heating components slides relative to the frame via the position adjustment component. The two groups of heating components are respectively used to heat two heat shrink tubes on the heat shrink wire harness (103).

8. The wire harness heat shrinking device for multi-position synchronous heat shrinking according to claim 1, characterized in that: The adjustment range of the position adjustment component for the heating component satisfies that: the heating area scanning range of the adjusted heating component during the adjustment process covers the span range of the heat shrink tube to be heated on the wire harness (103) to be heat shrunk.

9. The wire harness heat shrinking device for multi-position synchronous heat shrinking according to claim 1, characterized in that: The wire harness fixing mechanism (102) is fixed in position, and the heat shrink tube heating mechanism (101) moves relative to the wire harness fixing mechanism (102) under the drive of the overall driving mechanism.

10. A heat shrink integrated device for multi-position synchronous heat shrinkage, characterized in that: It comprises one or more workstations, and each workstation is provided with a wire harness heat shrinking device as described in any one of claims 1 to 9.

11. A wire harness heat shrinking processing method using the wire harness heat shrinking device according to any one of claims 1 to 9, wherein the wire harness has a plurality of heat shrinkable tubes to be heat shrunk, characterized in that: include: S1: placing the wire harness fixing mechanism (102) in an initial position outside the heat shrink tube heating mechanism (101); S2: adjusting the spacing of the multiple groups of heating components inside the heat shrink tube heating mechanism (101) by means of the position adjustment component so that the spacing matches the positions of the multiple heat shrink tubes on the wire harness (103) to be heat shrunk; S3: fixing the wire harness (103) to be heat shrunk and pre-covered with a heat shrink tube on the wire harness fixing mechanism (102), and driving the wire harness fixing mechanism (102) and the heat shrink tube heating mechanism (101) to move relative to each other through the overall driving mechanism, so that the wire harness (103) to be heat shrunk and fixed on the wire harness fixing mechanism (102) enters the heating area of ​​the heat shrink tube heating mechanism (101), and the multiple heat shrink tube positions on the wire harness (103) to be heat shrunk are respectively located in the heating areas of multiple groups of heating components that have been preheated to the target temperature; S4: using a plurality of heating components in the heat shrink tube heating mechanism (101) to simultaneously perform heat shrinkage treatment on a plurality of heat shrink tubes on the heat shrink wire harness (103); S5: After the heat shrinking process is completed, the wiring harness fixing mechanism (102) and the heat shrink tube heating mechanism (101) are driven again by the overall driving mechanism to move in opposite directions, so that the wiring harness (103) to be heat shrunk moves out of the heat shrink tube heating mechanism (101) and returns to the initial position, thereby completing the wiring harness heat shrinking process.

12. The wire harness heat shrink processing method according to claim 11, characterized in that: Before performing step S3, the distance between the first heating element (201) and the second heating element (202) relative to the wire harness (103) to be heat shrunk is adjusted in advance by the distance adjustment component so as to meet the requirements of the heat shrinking process.

13. The wire harness heat shrinking method according to claim 11, characterized in that: During the heat shrinking process of step S4, when the length of the heat shrinkable tube on the wire harness (103) to be heat shrunk is too long and the heating component cannot complete the heat shrinking process in one go, the adjusting component drives the heating component above it to move along the extension direction of the wire harness (103) to be heat shrunk, and the heating action position of the group of heating components on the wire harness (103) to be heat shrunk is continuously changed, so that the heat shrinking process is completed for the entire heat shrinkable tube.

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