Whole vehicle mounting sleeve welding fixture for battery box body

Abstract

The utility model discloses a battery box whole vehicle hanging sleeve welding clamp which comprises a clamp base body used for fixedly installing a battery box, a plurality of sets of sleeve positioning pins are arranged on the clamp base body, and all the sleeve positioning pins are arranged on the clamp base body in the mode that the sleeve positioning pins can move up and down through lifting assemblies. The outer diameter of the sleeve positioning pin is configured to be matched with an inner hole of a hanging sleeve, and the sleeve positioning pin is used for positioning the hanging sleeve. Pressing mechanisms with the same number as the sleeve positioning pins are arranged on the clamp base body, and the pressing mechanisms are arranged above the sleeve positioning pins in a one-to-one correspondence manner, so that a stable position relationship is formed between the battery box body and the hanging sleeve. The hanging sleeve has the beneficial effect of reducing the misloading and welding deformation of the hanging sleeve in the batch production process.

Description

Technical Field

[0001] The utility model relates to the technical field of tooling fixtures, and in particular to a battery box vehicle mounting sleeve welding fixture. Background Art

[0002] Power batteries are an important component of new energy electric vehicles. In the physical structure utility model, the power battery consists of a battery box and a battery pack located inside the box. The battery box is a frame-like structure with a number of holes distributed around it. A mounting sleeve is fixed in the hole. When the whole vehicle is assembled, the battery box can be assembled on the bottom of the car through the mounting sleeve, thereby realizing the mounting of the power battery. At present, the mounting sleeve is mainly fixed in the hole of the battery box by welding, and the welding process requires the use of a welding fixture to complete the welding.

[0003] In the prior art, the battery box mounting sleeve welding fixture has the following two technical problems:

[0004] 1. Since mounting sleeves have many different sizes, workers are prone to put mounting sleeves of wrong specifications into mounting holes during mass production (specifically, misinstalling small-sized sleeves into large-sized mounting holes), resulting in misinstallation, causing the product to fail to meet the dimensional tolerance requirements of welding and be scrapped, thereby affecting the yield and increasing production costs.

[0005] 2. In the current welding fixture, there is no facility to control welding deformation. During the cooling process after the mounting sleeve and the mounting hole are welded, the deformation generated at the welding point cannot meet the dimensional tolerance requirements, resulting in product scrapping, thereby affecting the yield rate and increasing production costs. Utility Model Content

[0006] In view of this, the utility model provides a battery box vehicle mounting sleeve welding fixture, which aims to reduce the misinstallation and welding deformation of the mounting sleeve during mass production.

[0007] To achieve the above purpose, the technical solution of the utility model is as follows:

[0008] A battery box vehicle mounting sleeve welding fixture, comprising a fixture base, which is used to fix and install the battery box, and is characterized in that a plurality of groups of sleeve locating pins are provided on the fixture base, and each of the sleeve locating pins is arranged on the fixture base so as to be movable up and down through a lifting assembly, and the outer diameter of the sleeve locating pin is configured to be adapted to an inner hole of a mounting sleeve, and the sleeve locating pin is used to position the mounting sleeve; a clamping mechanism corresponding to the number of the sleeve locating pins is provided on the fixture base, and each of the clamping mechanisms is arranged one-to-one above each of the sleeve locating pins, and the clamping mechanism is used to press the mounting sleeve onto the battery box so that a stable positional relationship exists between the two.

[0009] With the above structure, the battery box is placed into the corresponding position on the fixture base, and then the battery box is fixed to the fixture base through the clamping system. The lifting assembly drives the sleeve positioning pin to rise, and then the corresponding mounting sleeve is installed into the mounting hole, and then the clamping mechanism presses the mounting sleeve into the mounting hole, and then the mounting sleeve is welded into the mounting hole. After welding, it is cooled, and the clamping mechanism is released after cooling. The sleeve positioning pin has an anti-misinstallation function. When the mounting sleeve is too large, the mounting sleeve cannot be placed in the mounting hole; when the mounting sleeve installed in the mounting hole is too small, since the sleeve positioning pin is in an upward state and the mounting sleeve is too small in size, the mounting sleeve will be lifted up by the positioning pin insertion part and cannot be completely installed in the mounting hole.

[0010] Preferably, the lifting assembly includes a first cylinder, which is arranged directly below the sleeve positioning pin, wherein the sleeve positioning pin is fixedly connected to the cylinder rod of the first cylinder as a whole. With the above structure, the first cylinder drives the sleeve positioning pin to vertically rise and fall so that it can be inserted into the mounting hole.

[0011] Preferably, the clamping mechanism comprises a swing arm rotatably mounted on the fixture base and a driving assembly for driving the swing arm to rotate, and a pressing cylinder is provided at the far end of the swing arm, and the pressing cylinder is used to vertically press on the top of the mounting sleeve. With the above structure, the driving assembly drives the swing arm to rotate, so that the pressing cylinder can vertically press on the top of the mounting sleeve, and the mounting sleeve is kept fixed in the mounting hole.

[0012] Preferably: the pressing cylinder is a hollow structure, a sensor is fixed on the swing arm, the sensor is arranged just above the pressing cylinder, a corresponding detection rod is slidably mounted inside the pressing cylinder, and there is a gap between the detection rod and the sensor; in the process of the driving assembly driving the pressing cylinder to compress the mounting sleeve, the lower end of the detection rod will abut against the top of the mounting sleeve and be pushed upward, so that the top end of the detection rod crosses the gap and abuts against the sensor; an elastic element is provided between the detection rod and the pressing cylinder, and the elastic element provides a vertical downward driving force to the detection rod. With the above structure, when the pressing cylinder completely compresses the mounting sleeve in the mounting hole, the detection rod will overcome the driving force provided by the elastic element, and the upper end of the detection rod will abut against the sensor, causing the sensor to emit a sound or light, which is used to distinguish whether the pressing cylinder has completely compressed the mounting sleeve.

[0013] Preferably, the clamp base is provided with a clamping system for fixing the battery box, the clamping system includes a longitudinal limit assembly arranged above the battery box, the longitudinal limit assembly has a limit swing arm rotatably arranged above the battery box, the limit swing arm is driven by the longitudinal limit cylinder to abut against the top of the battery box. With the above structure, the longitudinal limit cylinder drives the limit swing arm to rotate, and the limit swing arm rotates and presses on the top of the battery box, so that the battery box cannot move longitudinally.

[0014] Preferably, the clamping system includes a case locating pin slidably disposed on the clamp base, the case locating pin is configured to be adapted to the locating hole, the case locating pin is driven by a locating cylinder to penetrate into the locating hole, and the case locating pin is used to locate the battery case. With the above structure, when placing the battery case into the corresponding position on the clamp base, the case locating pin is first raised, and finally, the battery case is placed on the clamp base with the locating hole aligned with the case locating pin.

[0015] Preferably, the clamping system includes a plurality of groups of transverse limit assemblies distributed on the clamp base, each of which has a telescopic arm that moves horizontally, and the telescopic arm is driven by a transverse limit cylinder so that the end of the telescopic arm abuts against the inner wall of the battery box. With the above structure, the transverse limit cylinder drives the end of the telescopic arm to abut against the inner wall of the battery box, limiting the horizontal movement of the battery box.

[0016] Preferably, the fixture base is provided with a cooling air nozzle near the upper end of the sleeve positioning pin, and the cooling air nozzle is used to cold-blow the weld between the mounting sleeve and the battery box. With the above structure, after the mounting sleeve is welded to the battery box, the cooling air nozzle is used to blow air to quickly cool the weld.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. Since the outer diameter of the sleeve locating pin is adapted to the inner hole of the corresponding mounting sleeve, and before the mounting sleeve is installed in the mounting hole, the lifting assembly will drive the sleeve locating pin to rise into the mounting hole. Therefore, when the mounting sleeve installed in the mounting hole is too small, the mounting sleeve will be lifted up by the sleeve locating pin; when the mounting sleeve installed in the mounting hole is too large, the mounting sleeve cannot be installed in the mounting hole, so that the sleeve locating pin has the function of preventing wrong installation.

[0019] 2. During the welding process between the mounting sleeve and the mounting hole and the cooling process after welding, the swing arm always presses the mounting sleeve tightly into the mounting hole, and during the welding and cooling processes, the weld will deform to a certain extent. Since the top of the mounting sleeve is always pressed tightly, the deformation degree of the weld will be reduced, making it easier to meet the size requirements, thereby improving the yield rate and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the battery box vehicle mounting sleeve welding fixture;

[0021] Figure 2 for Figure 1 A partial enlarged view of point I in the middle;

[0022] Figure 3 This is a top view of the welding fixture for the battery box vehicle mounting sleeve;

[0023] Figure 4 For along Figure 3 Sectional view of AA in the middle;

[0024] Figure 5 for Figure 4 A partial enlarged view of position II in the middle;

[0025] Figure 6 The figure is a flowchart of the mounting sleeve welding method. DETAILED DESCRIPTION

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

[0027] Embodiment 1

[0028] like Figure 1 , Figure 4 and Figure 5 As shown, a battery box vehicle mounting sleeve welding fixture includes a fixture base 2 and a clamping system 3. The fixture base 2 is used to install a battery box 1 with a rectangular frame structure. The clamping system 3 is used to fix the battery box 1. The battery box 1 frame is provided with mounting holes 11 and positioning holes 12. The mounting holes 11 can be mounted with mounting sleeves a adapted thereto. The mounting sleeve a has an annular step at the top, and the size of the annular step is larger than the mounting hole 11, so that the mounting sleeve a can be mounted in the mounting hole 11. In this embodiment, the number of positioning holes 12 is three groups, and the positioning holes 12 are all opened through the battery box 1, wherein the number of positioning holes 12 can also be two groups, four groups, etc. The fixture base 2 is provided with a sleeve positioning pin 4 and a clamping mechanism 5, wherein the sleeve positioning pin 4 is used to position the mounting sleeve a, and the clamping mechanism 5 is used to press the mounting sleeve a onto the battery box 1 so that there is a stable positional relationship between the two.

[0029] like Figure 1 and Figure 5As shown, the number of sleeve locating pins 4 and clamping mechanisms 5 are both several groups, and they all correspond one-to-one to the mounting holes 11, and the sleeve locating pins 4 and the clamping mechanisms 5 are respectively arranged directly below and above the mounting holes 11. Among them, the sleeve locating pins 4 are lifted and lowered by the lifting assembly 1a, and the clamping mechanism 5 is driven by the driving assembly 2a to clamp the mounting sleeve a in the mounting hole 11. The sleeve locating pin 4 has a locating pin insertion portion 41, and the outer diameter of the locating pin insertion portion 41 is adapted to the inner hole size of the mounting sleeve a of the correct specification. The lifting assembly 1a can drive the locating pin insertion portion 41 to rise and penetrate into the mounting sleeve a.

[0030] Based on the above design, the battery case 1 is placed in the corresponding position on the fixture base 2, and the battery case 1 and the fixture base 2 are fixed by the clamping system 3. Then the lifting component 1a drives the positioning pin insertion part 41 to rise and penetrate into the mounting hole 11, and then the mounting sleeve a of the correct specification is installed in the mounting hole 11, and then the driving component 2a drives the clamping mechanism 5 to press the mounting sleeve a into the mounting hole 11. When the size of the mounting sleeve a installed in the mounting hole 11 is too large, the mounting sleeve a cannot be placed in the mounting hole 11; when the size of the mounting sleeve a installed in the mounting hole 11 is too small, the inner hole size of the mounting sleeve a is smaller than the outer diameter size of the positioning pin insertion part 41, and the mounting sleeve a will be lifted up by the positioning pin insertion part 41 and cannot be completely installed in the mounting hole 11, so that the sleeve positioning pin 4 has an anti-misinstallation function.

[0031] In this embodiment, the lifting assembly 1a includes a first cylinder 11a, and the driving assembly 2a adopts a second cylinder 21a. The first cylinder 11a is arranged directly below the sleeve positioning pin 4, wherein the sleeve positioning pin 4 is fixedly connected to the cylinder rod of the first cylinder 11a as a whole, and the first cylinder 11a can directly control the sleeve positioning pin 4 to perform lifting and lowering movements. The clamping mechanism 5 is rotatably installed, and the clamping mechanism 5 is driven by the second cylinder 21a to vertically press on the top of the mounting sleeve a, and the second cylinder 21a can drive the clamping mechanism 5 to rotate and press on the top of the mounting sleeve a.

[0032] like Figure 2 and Figure 5As shown, the clamping mechanism 5 includes a swing arm 53 rotatably mounted on the fixture base 2 and a pressure cylinder 51 disposed at the far end of the swing arm 53. The pressure cylinder 51 is a hollow structure. The second cylinder 21a drives the swing arm 53 to rotate, thereby driving the pressure cylinder 51 to vertically press on the top of the mounting sleeve a. A sensor 6 is fixed on the swing arm 53. The sensor 6 is disposed just above the pressure cylinder 51. A corresponding detection rod 52 is slidably mounted in the pressure cylinder 51. There is a gap between the detection rod 52 and the sensor 6. An elastic element may be disposed between the detection rod 52 and the pressure cylinder 51. The elastic element provides a vertical downward driving force to the detection rod 52. A stopper is disposed at the lower end of the detection rod 52. The size of the stopper is larger than the size of the inner hole of the mounting sleeve a, so that the stopper cannot penetrate into the mounting sleeve a. The stopper may be a disc having an outer diameter larger than the size of the inner hole of the mounting sleeve a. Based on the above design, under the action of gravity and the elastic element, the stopper of the detection rod 52 will protrude from the lower end of the pressing cylinder 51. When the second cylinder 21a drives the pressing cylinder 51 to press the mounting sleeve a, the stopper will abut against the top of the mounted sleeve a. The stopper will be pushed upward by the top of the mounting sleeve a, thereby overcoming the driving force of the elastic element, so that the detection rod 52 moves along the length direction of the pressing cylinder 51. When the pressing cylinder 51 completely presses the mounting sleeve a, the top end of the detection rod 52 just crosses the interval and abuts against the signal receiving end of the sensor 6, so that the sensor 6 can emit light, indicating that the pressing cylinder 51 presses the mounting sleeve a. The cooperation between the detection rod 52 and the sensor 6 can be used to determine whether the pressing cylinder 51 presses the mounting sleeve a.

[0033] like Figure 5 As shown, the clamping system 3 includes a case locating pin 33, a longitudinal limiting assembly 31 and a transverse limiting assembly 32. The case locating pin 33 is slidably arranged just below the positioning hole 12, and the case locating pin 33 is configured to be adapted to the positioning hole 12. The case locating pin 33 is driven by the positioning cylinder 34 to penetrate into the positioning hole 12, and the case locating pin 33 is used to locate the battery case 1. The lifting rod of the positioning cylinder 34 is fixedly connected to the case locating pin 33 as a whole. After the positioning cylinder 34 drives the case locating pin 33 to rise, the battery case 1 is placed on the fixture base 2 when the positioning holes 12 are aligned with the case locating pin 33, to ensure that the battery case 1 is correctly positioned on the fixture base 2.

[0034] like Figure 2 , Figure 3 and Figure 5As shown, the longitudinal limit assembly 31 is arranged above the battery case 1, and the number is several groups, and they are distributed one by one around the clamp base 2. The longitudinal limit assembly 31 has a limit swing arm 311 that is rotatably arranged above the battery case 1. The limit swing arm 311 is provided with a limit part 313 at the far end. The limit swing arm 311 is driven by the longitudinal limit cylinder 312, and the limit swing arm 311 rotates, driving the limit part 313 to vertically press on the top of the battery case 1, clamping the battery case 1 on the clamp base 2, so that the battery case 1 cannot move longitudinally. In this embodiment, the second cylinder 21a and the longitudinal limit cylinder 312 are both rotary cylinders, gear-type rotary cylinders, etc., which are convenient for taking and placing the battery case 1. There are several groups of transverse limit assemblies 32, which are distributed one by one on the clamp base 2. The transverse limit assemblies 32 all have a horizontally movable telescopic arm 321. The telescopic arm 321 is driven by a transverse limit cylinder 322, so that the end of the telescopic arm 321 abuts against the inner wall of the battery box 1, pressing the battery box 1 against the clamp base 2, thereby limiting the horizontal movement of the battery box 1.

[0035] like Figure 2 and Figure 3 As shown, the fixture base 2 is provided with a cooling air nozzle 7 near the upper end of the sleeve positioning pin 4, and corresponds to the mounting hole 11 one by one. The air outlet of the cooling air nozzle 7 is facing the upper end of the mounting hole 11. The cooling air nozzle 7 is used to cold-blow the weld between the mounting sleeve a and the battery box 1 to speed up the cooling speed and improve the efficiency. A protective cover 8 is provided on the outside of the cooling air nozzle 7 to prevent external objects from hitting the cooling air nozzle 7 and affecting the cooling effect.

[0036] Embodiment 2

[0037] like Figure 6 As shown, a mounting sleeve welding method implemented by the battery box vehicle mounting sleeve welding fixture based on the first embodiment is as follows:

[0038] S1: Control the box positioning pin 33 to rise, put the battery box 1 into the corresponding position of the clamp base 2, and fix it on the clamp base 2 through the transverse limiting assembly 32 and the longitudinal limiting assembly 31;

[0039] S2: Control the sleeve positioning pin 4 to rise, so that the positioning pin insertion part 41 is inserted into the mounting hole 11 opened on the battery box 1, and the mounting sleeve a is installed into the mounting hole 11. At this time, the mounting sleeve a is covered on the positioning pin insertion part 41, and they are adapted to each other;

[0040] S3: Control the second cylinder 21a to drive the swing arm 53 to rotate, so as to press the mounting sleeve a tightly into the mounting hole 11;

[0041] S4: welding the mounting sleeve a into the mounting hole 11, and cooling the weld by blowing air through the cooling air nozzle 7 after welding;

[0042] S5: After cooling is completed, the swing arm 53 and the sleeve positioning pin 4 return to their original positions.

[0043] S5: welding the mounting sleeve a into the mounting hole 11 by means of a welding gun, and cooling the weld by blowing air through the cooling air nozzle 7 after the welding is completed;

[0044] S6: After cooling is completed, the swing arm 53, the sleeve positioning pin 4, the box positioning pin 33, the transverse limiting assembly 32 and the longitudinal limiting assembly 31 all return to their original positions.

[0045] Based on the above method, during the welding process between the mounting sleeve a and the mounting hole 11 and the cooling process after welding, the swing arm 53 always presses the mounting sleeve a tightly in the mounting hole 11, and during the welding process and the cooling process, the welding part will be deformed to a certain extent. Since the top of the mounting sleeve a is always pressed, the degree of deformation caused by welding is reduced, it is easier to meet the size requirements, and the probability of the hole size out-of-tolerance problem is reduced, thereby improving the yield rate and reducing the production cost.

[0046] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make a variety of similar expressions without violating the purpose and claims of the present invention, and such changes fall within the scope of protection of the present invention.

Claims

1. A battery box vehicle mounting sleeve welding fixture, comprising a fixture base (2), which is used to fix and install the battery box (1), characterized in that: The fixture base (2) is provided with a plurality of sets of sleeve positioning pins (4), each of which is arranged on the fixture base (2) so as to be movable up and down via a lifting assembly (1a), the outer diameter of the sleeve positioning pin (4) being configured to be compatible with the inner hole of the mounting sleeve (a), and the sleeve positioning pin (4) is used to position the mounting sleeve (a); The clamp base (2) is provided with clamping mechanisms (5) whose number is consistent with the sleeve positioning pins (4), and each of the clamping mechanisms (5) is arranged one by one above each of the sleeve positioning pins (4). The clamping mechanisms (5) are used to press the mounting sleeve (a) onto the battery box (1) so that the two have a stable positional relationship.

2. The battery box vehicle mounting sleeve welding fixture according to claim 1 is characterized in that: The lifting assembly (1a) comprises a first cylinder (11a), which is arranged directly below a sleeve positioning pin (4), wherein the sleeve positioning pin (4) is fixedly connected to a cylinder rod of the first cylinder (11a) as a whole.

3. The battery box vehicle mounting sleeve welding fixture according to claim 1 is characterized in that: The clamping mechanism (5) comprises a swing arm (53) rotatably mounted on a clamp base (2) and a driving assembly (2a) for driving the swing arm (53) to rotate. A pressing cylinder (51) is provided at the far end of the swing arm (53), and the pressing cylinder (51) is used to vertically press on the top of the mounting sleeve (a).

4. The battery box vehicle mounting sleeve welding fixture according to claim 3 is characterized in that: The pressing cylinder (51) is a hollow structure. The swing arm (53) is fixedly provided with a sensor (6). The sensor (6) is arranged directly above the pressing cylinder (51). A corresponding detection rod (52) is slidably mounted inside the pressing cylinder (51). There is a gap between the detection rod (52) and the sensor (6). When the driving component (2a) drives the pressing cylinder (51) to press the mounting sleeve (a), the lower end of the detection rod (52) will abut against the top of the mounting sleeve (a) and be pushed upward, so that the top end of the detection rod (52) passes the gap and abuts against the sensor (6). An elastic element is provided between the detection rod (52) and the pressing cylinder (51), and the elastic element provides a vertical downward driving force to the detection rod (52).

5. The battery box vehicle mounting sleeve welding fixture according to claim 1 is characterized in that: The clamping system (3) for fixing the battery box (1) is arranged on the clamping base (2), and the clamping system (3) comprises a longitudinal limit assembly (31) arranged above the battery box (1), and the longitudinal limit assembly (31) has a limit swing arm (311) rotatably arranged above the battery box (1), and the limit swing arm (311) is driven by a longitudinal limit cylinder (312) so as to abut against the top of the battery box (1).

6. The battery box vehicle mounting sleeve welding fixture according to claim 5 is characterized in that: The clamping system (3) comprises a case positioning pin (33) slidably arranged on a clamp base (2), the case positioning pin (33) being configured to be compatible with a positioning hole (12), the case positioning pin (33) being driven by a positioning cylinder (34) to penetrate into the positioning hole (12), and the case positioning pin (33) being used to position a battery case (1).

7. The battery box vehicle mounting sleeve welding fixture according to claim 5 is characterized in that: The clamping system (3) comprises a plurality of groups of transverse limiting assemblies (32) distributed on a clamp base (2), each of the transverse limiting assemblies (32) having a horizontally movable telescopic arm (321), the telescopic arm (321) being driven by a transverse limiting cylinder (322) so that the end of the telescopic arm (321) abuts against the inner wall of the battery box (1).

8. The battery box vehicle mounting sleeve welding fixture according to claim 1 is characterized in that: The clamp base (2) is provided with a cooling air nozzle (7) at a position close to the upper end of the sleeve positioning pin (4), and the cooling air nozzle (7) is used for cold-blowing the weld between the mounting sleeve (a) and the battery box (1).

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