Positioning tool and machining system

Abstract

The utility model relates to a positioning tool and a machining system, the positioning tool comprises a body, a connecting piece and an elastic piece, the connecting piece is connected with the body, the connecting piece is used for being connected with a sleeve of a battery pack box in an inserted mode so as to position the relative position of the sleeve in the battery pack box, and the elastic piece is connected with the body so as to elastically support the sleeve. According to the technical scheme, the connecting piece and the sleeve are directly inserted to position the relative position of the sleeve in the battery pack box body, the connecting piece and the sleeve are matched with the elastic piece which elastically supports the sleeve, and the axial elastic support of the elastic piece can ensure that the sleeve and the battery box body have enough fitting degree and perpendicularity; and the position of the sleeve relative to the battery pack box body during welding is prevented from being changed, so that the position degree of the sleeve relative to the battery pack box body after welding is guaranteed.

Description

Technical Field

[0001] This application relates to the field of battery pack technology, and in particular to a positioning tooling and processing system. Background Technology

[0002] When installing a battery pack into an electrical device, a sleeve is usually installed on the battery pack housing, and the positioning pin on the electrical device is used to connect the sleeve to the battery pack housing. The sleeve is formed on the bottom plate of the battery pack housing by welding.

[0003] In related technologies, after the sleeve is welded to the bottom plate of the battery pack housing, the geometric tolerance of the sleeve relative to the bottom plate of the battery pack housing is relatively large, resulting in poor connection stability between the battery pack housing and the electrical equipment after installation. Utility Model Content

[0004] This application provides a positioning fixture that reduces the geometric tolerance of the sleeve relative to the bottom plate of the battery pack housing after welding, thereby at least partially solving the above-mentioned technical problems.

[0005] To achieve the above objectives, according to a first aspect of this application, a positioning fixture is provided, comprising:

[0006] ontology;

[0007] A connector, which is connected to the body, is used to insert into a sleeve of the battery pack housing to position the sleeve relative to the battery pack housing; and

[0008] An elastic element is connected to the body and is used to elastically support the sleeve.

[0009] Optionally, the elastic element is configured as a columnar spring;

[0010] The columnar spring surrounds the connector.

[0011] Optionally, the elastic element has a compressed state, wherein in the compressed state, the dimension of the elastic element along the first direction is the compressed dimension;

[0012] The sleeve includes: a tail portion, the tail portion having a first dimension along a first direction;

[0013] The compressed size is larger than the first size.

[0014] Optionally, the sleeve has a receiving space;

[0015] Wherein, at least a portion of the connector is configured to be located within the receiving space to limit the displacement of the sleeve along the second direction;

[0016] The first direction intersects with the second direction.

[0017] Optionally, the positioning fixture further includes:

[0018] A decoupling element configured to disconnect the connector from the sleeve;

[0019] The decoupling component is connected to the main body.

[0020] Optionally, the body is formed as follows:

[0021] Through-hole, opened along the first direction;

[0022] The decoupling component is partially located within the through hole, so that a force can be applied to the battery pack housing to disengage the connector from the sleeve.

[0023] Optionally, the positioning fixture further includes:

[0024] The limiting component is configured to limit the displacement of the battery pack housing along a first direction.

[0025] The limiting member is connected to the body.

[0026] Optionally, the second dimension of the connector along the first direction is greater than or equal to three-quarters of the third dimension of the sleeve along the first direction; and / or

[0027] The difference between the outer radial dimension of the connector and the inner radial dimension of the head of the sleeve ranges from 0.1 mm to 0.25 mm.

[0028] Optionally, the positioning fixture further includes:

[0029] The support is fixedly connected to the main body.

[0030] According to a second aspect of this application, a processing system is provided, including a positioning fixture and a welding device as described above, the welding device being used to weld a sleeve for a battery pack housing.

[0031] The beneficial effect of this application is that it provides a positioning tooling that reduces the geometric tolerance of the sleeve relative to the bottom plate of the battery pack housing after the welding of the sleeve and the bottom plate of the battery pack housing is completed.

[0032] More specifically, some embodiments of this application may produce the following specific beneficial effects:

[0033] In the positioning fixture of this application embodiment, the positioning fixture includes a body, a connector, and an elastic member. The connector is connected to the body and is used to insert into the sleeve of the battery pack housing to position the relative position of the sleeve within the battery pack housing. The elastic member is connected to the body to elastically support the sleeve. Through the above technical solution, the connector is directly inserted into the sleeve to position the relative position of the sleeve within the battery pack housing, and the elastic member provides elastic support to the sleeve. The axial elastic support of the elastic member ensures sufficient fit and perpendicularity between the sleeve and the battery pack housing, preventing changes in the sleeve's position relative to the battery pack housing during welding, thereby ensuring the positional accuracy of the sleeve relative to the battery pack housing after welding.

[0034] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0037] Figure 1 This is a schematic diagram of the overall structure of the positioning tooling provided in an exemplary embodiment of this application;

[0038] Figure 2 This is a schematic diagram of the overall structure of the positioning tooling provided in an exemplary embodiment of this application from another angle;

[0039] Figure 3 This is a top view of the positioning tooling, battery pack housing, and sleeve provided in an exemplary embodiment of this application.

[0040] Figure 4 This is an exemplary implementation of the present application. Figure 1 A magnified structural diagram at point D in the diagram;

[0041] Figure 5 This is a schematic diagram of the overall structure of the positioning tooling provided in an exemplary embodiment of this application from another angle;

[0042] Figure 6 yes Figure 5 Schematic diagram of the cross-sectional structure of the middle AA section;

[0043] Figure 7 yes Figure 6 A structural schematic diagram of the AA cross-section from another angle;

[0044] Figure 8 yes Figure 5 Schematic diagram of the cross-sectional structure of the middle BB section;

[0045] Figure 9 yes Figure 8 A structural schematic diagram of the BB cross-section from another angle;

[0046] Figure 10 This is a schematic diagram of the connection structure between the positioning tooling and the battery pack housing and sleeve provided in an exemplary embodiment of this application;

[0047] Figure 11 yes Figure 10 Schematic diagram of the cross-sectional structure of the middle CC section;

[0048] Figure 12 This is a schematic diagram showing the state in which the compression dimension of the elastic element provided in the exemplary embodiment of this application is equal to the first dimension of the tail of the sleeve;

[0049] Figure 13 This is a schematic diagram showing the state in which the compression dimension of the elastic element provided in the exemplary embodiment of this application is greater than the first dimension of the tail of the sleeve.

[0050] Explanation of reference numerals in the attached figures:

[0051] 100. Positioning fixture; 110. Body; 110a. Through hole; 120. Connector; 130. Elastic component; 140. Decoupling component; 150. Limiting component; 160. Support; 200. Sleeve; 200a. Accommodation space; 210. Tail end; 220. Head end; 300. Battery pack housing; 310. Base plate; 10. Machining system; L1. Compression dimension; L2. First dimension; L3. Second dimension; L4. Third dimension. Detailed Implementation

[0052] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0053] Reference Figure 1 As shown, for ease of explanation, the directions of up, down, left, and right are used in the corresponding figures to illustrate the relative positional relationships between the parts in this application. These should not be construed as limitations on absolute positions.

[0054] Furthermore, in this application, the first direction corresponds to the up-down direction and the second direction corresponds to the left-right direction; similarly, the first direction here indicates the up-down direction only for the convenience of introducing the specific embodiments of this application. There is no absolute correspondence between the first direction and the up-down direction, and similarly, there is no absolute correspondence between the second direction and the left-right direction.

[0055] The first and second directions in this application are only for expressing relative positional relationships; they merely indicate approximate locations rather than absolute geometric relationships.

[0056] According to the first aspect of this application, reference to Figures 1 to 4 A positioning fixture 100 is provided, including a body 110, a connector 120 and an elastic member 130.

[0057] In this embodiment, the connector 120 is connected to the body 110, and the connector 120 is used to insert into the sleeve 200 of the battery pack housing 300 to position the relative position of the sleeve 200 in the battery pack housing 300 (e.g., ...). Figure 12 and Figure 13 As shown), the elastic element 130 is connected to the body 110 and is used to elastically support the sleeve 200.

[0058] Through the above technical solution, the connector 120 and the sleeve 200 are directly inserted to position the relative position of the sleeve 200 in the battery pack housing 300, and cooperate with the elastic element 130 to elastically support the sleeve 200. The axial elastic support of the elastic element 130 can ensure that the sleeve 200 and the battery pack housing 300 have sufficient fit and perpendicularity, and avoid the position of the sleeve 200 relative to the battery pack housing 300 during welding, thereby ensuring the positional accuracy of the sleeve 200 relative to the battery pack housing 300 after welding.

[0059] It should be noted that in this embodiment, the sleeve 200 is welded to the base plate 310 in the battery pack housing 300. The relative position of the sleeve 200 to the battery pack housing 300 refers to the position of the sleeve 200 relative to the base plate 310. The elastic member 130 can make the sleeve 200 fit tightly against the base plate 310, thereby achieving the positioning effect of the elastic member 130 and ensuring the relative position of the sleeve 200 to the battery pack housing 300, so as to ensure the position of the sleeve 200 after welding the sleeve 200 to the base plate 310.

[0060] In some embodiments, reference Figure 4 The elastic element 130 is configured as a columnar spring; wherein the columnar spring surrounds the connector 120.

[0061] In this embodiment, the elastic element 130 is constructed as a columnar spring and the columnar spring surrounds the connector 120, which enables the columnar spring to be connected to the connector 120. During the process of elastically supporting the sleeve 200, the connector 120 can prevent the columnar spring from tilting, thereby improving the stability during the welding process of the sleeve 200.

[0062] The columnar spring in this embodiment is a mold spring with an elastic force of over 20KG.

[0063] In this embodiment, "columnar spring surrounding connector 120" means that the columnar spring is sleeved on the outside of connector 120, with one end of the columnar spring abutting against the body 110 and the other end abutting against the sleeve 200, thereby applying an elastic force to the sleeve 200 that can move closer to the bottom plate 310 of the box, so as to achieve the effect of elastically supporting the sleeve 200.

[0064] In some embodiments, the elastic member 130 has a compressed state, and in the compressed state, the dimension of the elastic member 130 along the first direction is the compressed dimension L1.

[0065] refer to Figure 13 The sleeve 200 includes: a tail portion 210, the tail portion 210 having a first dimension L2 along a first direction.

[0066] Wherein, the compression dimension L1 is greater than the first dimension L2, so that the elastic element 130 can also avoid the collision between the body 110 and the sleeve 200 when it is compressed, that is, avoid contact between the body 110 and the sleeve 200.

[0067] refer to Figure 13 When the compression dimension L1 is greater than the first dimension L2, there is a gap between the body 110 and the tail 210 of the sleeve 200. That is, when the elastic element 130 is under extreme compression, the body 110 and the tail 210 of the sleeve 200 do not make direct contact.

[0068] Figure 5 This is a top view of the positioning fixture provided in an exemplary embodiment of this application.

[0069] In this embodiment of the application, reference is made to Figure 6 The size of the elastic element 130 in its natural state is defined as the natural size L0, which is greater than the compressed size L1.

[0070] In this embodiment, the compressed state of the elastic element 130 refers to the state in which, under the action of the gravity of the sleeve 200 and the battery pack housing 300, it can still apply an upward elastic force to the sleeve 200 after being compressed, and the elastic element 130, the sleeve 200 and the battery pack housing 300 are in a balanced state as a whole.

[0071] join Figure 7 In this embodiment, the connector 120 can be a pin structure, and the pin structure is integrally formed with the body 110. Of course, the pin structure can also be fixedly connected to the body 110.

[0072] It should be noted that, in this embodiment of the application, the tail 210 of the sleeve 200 is the part located below the bottom plate 310 of the battery pack housing 300 after the sleeve 200 and the connector 120 are inserted.

[0073] The head 220 of the sleeve 200 is the part located above the bottom plate 310 of the battery pack housing 300 after the sleeve 200 is inserted into the connector 120.

[0074] In this embodiment, the outer diameter of the tail 210 of the sleeve 200 is larger than the outer diameter of the head 220, and the inner diameter of the tail 210 is larger than the inner diameter of the head 220.

[0075] refer to Figure 12 The compression dimension L1 can also be equal to the first dimension L2, that is, in the compressed state, there will be no large force impact between the body 110 and the tail of the sleeve 200.

[0076] In some embodiments, the sleeve 200 has a receiving space 200a, in which at least a portion of the connector 120 is configured to be located within the receiving space 200a to limit displacement of the sleeve 200 along a second direction, wherein the first direction intersects the second direction.

[0077] By configuring at least a portion of the connector 120 within the receiving space 200a of the sleeve 200 to limit the displacement of the sleeve 200 in the second direction, and cooperating with the elastic member 130 to support the sleeve 200, the relative position of the sleeve 200 and the bottom plate 310 of the battery pack housing 300 can be further guaranteed. Moreover, only the receiving space 200a needs to be opened on the sleeve 200, without the need for additional components, which can reduce the number of tooling components and facilitate disassembly and assembly.

[0078] In some embodiments, reference Figure 8 and Figure 9 The positioning fixture 100 also includes a decoupling component 140.

[0079] In this embodiment, the decoupling element 140 is connected to the body 110 and configured to disconnect the connector 120 from the sleeve 200.

[0080] In some embodiments, reference Figure 8 and Figure 9 The body 110 has a through hole 110a.

[0081] In this embodiment, the through hole 110a is opened along the first direction. The through hole 110a is a through hole opened along the first direction. A portion of the decoupling member 140 is located inside the through hole 110a so that a force can be applied to the battery pack housing 300 to disengage the connector 120 from the sleeve 200.

[0082] After the sleeve 200 is welded, the sleeve 200 is fixedly connected to the base plate 310 of the battery pack housing 300. Then, the decoupling component 140 applies a force along the first direction to the battery pack housing 300, thereby enabling the battery pack housing 300 to disengage the sleeve 200 from the connector 120.

[0083] It should be noted that the decoupling component 140 applies an upward force to the battery pack housing 300. Under the action of the upward force, the battery pack housing 300 and the sleeve 200 can move upward together to disengage from the connector 120.

[0084] For example, the decoupling component 140 is constructed as a cylinder, defined as the first cylinder. The first cylinder is positioned below the body 110, for example, it can be fixed to the body 110. The bottom of the first cylinder is supported and fixed by the support 160, and part of the piston rod of the first cylinder is located in the through hole 110a. When it is necessary to disconnect the connection between the connector 120 and the sleeve 200, the piston rod of the first cylinder passes through the through hole 110a upward and applies an upward force to the battery pack housing 300. This allows the sleeve 200, which is welded to the bottom plate 310 of the battery pack housing 300, to be moved upward. This causes part of the connector 120 to continuously exit from the receiving space 200a of the sleeve 200, thereby achieving the effect of disconnecting the connector 120 from the sleeve 200.

[0085] Furthermore, during the upward movement of the battery pack housing 300, other auxiliary structures, such as a robotic arm, can apply an upward force to the battery pack housing 300, enabling the battery pack housing 300 to move upward stably and releasing the force exerted by the positioning fixture 100 on the battery pack housing 300.

[0086] For example, a through hole 110a can be provided around the connector 120, and then the piston rod of the first cylinder can be passed through the through hole 110a to apply an upward force to the battery pack housing 300.

[0087] In this embodiment of the application, the connector 120 can be set to four, and correspondingly, the number of through holes 110a can also be set to four. This allows the machining position of the sleeve 200 to be controlled within 0.15mm, and avoids the sleeve 200 from getting stuck with the connector 120.

[0088] In some embodiments, reference Figure 10 The positioning fixture 100 also includes: a limiting component 150.

[0089] Figure 11 yes Figure 10 A schematic diagram of the cross-sectional structure along the CC axis.

[0090] In this embodiment, the limiting member 150 is configured to limit the displacement of the battery pack housing 300 along the first direction, that is, the limiting member 150 can limit the upward or downward displacement of the battery pack housing 300.

[0091] In this embodiment, the limiting member 150 is connected to the body 110.

[0092] For example, the limiting member 150 can be configured as a cylinder, defined as a second cylinder, and the second cylinder is fixed at the corresponding position of the body 110.

[0093] The second cylinder is located on both sides of the edge of the main body 110 to press the edge of the battery pack housing 300, ensuring the installation stability between the battery pack housing 300 and the main body, and avoiding the problem that the battery pack housing 300 will shift relative to the main body during the welding process, resulting in a large positional difference between the sleeve 200 and the battery pack housing 300 after the sleeve 200 is welded to the corresponding position of the battery pack housing 300.

[0094] In this embodiment, the number of second cylinders can be eight, and they are arranged in groups of four on opposite left and right sides of the body 110.

[0095] In this embodiment, the piston rod of the second cylinder can be connected to a clamping arm. The clamping arm can rotate relative to the piston rod. That is, when it is necessary to limit the displacement of the battery pack housing 300 in the first direction, the clamping arm contacts the battery pack housing 300, and the piston rod of the second cylinder also limits the displacement of the clamping arm in the first direction. This allows the clamping arm to limit the displacement of the battery pack housing in the first direction.

[0096] Without needing to restrict the displacement of the battery pack housing 300 in the first direction, the clamping arm is rotated, and on the projection plane perpendicular to the first direction, the projection of the clamping arm on the projection plane is completely offset from the projection of the battery pack housing 300 on the projection plane. This ensures that the clamping arm will not interfere with the battery pack housing 300 during the upward movement driven by the first cylinder.

[0097] In some embodiments, reference Figure 12 The second dimension L3 of the connector 120 along the first direction is greater than or equal to three-quarters of the third dimension L4 of the sleeve 200 along the first direction, so that the connector 120 can effectively limit the sleeve 200.

[0098] For example, if the second dimension L3 of the connector 120 along the first direction is set to 65mm, and the third dimension L4 of the sleeve 200 along the first direction is 86mm, then the third dimension L4 of the sleeve 200 along the first direction is three-quarters of 87mm, which is 64.5mm. Therefore, the second dimension L3 of the connector 120 along the first direction is set to 65mm, which is greater than 64.5mm.

[0099] In this embodiment, the difference between the outer radial dimension of the connector 120 and the inner radial dimension of the head 220 of the sleeve 200 ranges from 0.1 mm to 0.25 mm. This reduces the clearance of the sleeve 200 and ensures the perpendicularity of the sleeve 200.

[0100] For example, the difference between the outer circumferential radial dimension of the connector 120 and the inner circumferential radial dimension of the sleeve 200 can be 0.2 mm.

[0101] By setting the second dimension L3 of the connector 120 along the first direction to be greater than or equal to three-quarters of the third dimension L4 of the sleeve 200 along the first direction, and by setting the difference between the outer radial dimension of the connector 120 and the inner radial dimension of the sleeve 200 to be in the range of 0.1mm to 0.25mm, the sleeve 200 and the connector 120 can be easily disassembled and assembled, while the positional accuracy and perpendicularity of the sleeve 200 after welding can be guaranteed.

[0102] The material of the connector 120 in this embodiment can be mold steel, which requires heat treatment to improve its strength.

[0103] In some embodiments, reference Figure 3 The positioning fixture 100 also includes a support 160, and the support 160 is connected to the body 110.

[0104] By connecting the main body 110 to the support 160, other parts such as the limiting member 150 and the decoupling member 140 can be stably installed.

[0105] In summary, in this embodiment of the application, the sleeve 200 and the base plate 310 of the battery pack housing 300 are positioned by the connector 120 and the second cylinder presses the battery pack housing 300 together. The sleeve 200 is then welded to the base plate 310 of the battery pack housing 300, thus completing the welding of the sleeve 200. After the welding is completed and cooled, the decoupling member 140 is used to apply an upward force to the battery pack housing 300 so that the battery pack housing 300 can drive the sleeve 200 to separate upward and from the connector 120, thereby ensuring the positional accuracy of the sleeve 200.

[0106] In this embodiment, after the positioning fixture 100 is used to weld the sleeve 200 and the base plate 310 of the battery pack housing 300, the situation of rework caused by the poor position of the battery pack housing 300 leading to the vehicle installation point is avoided.

[0107] According to a second aspect of this application, a processing system 10 is provided, including a positioning fixture 100 as described above and a welding device for welding the sleeve 200 of a battery pack housing 300.

[0108] The processing system 10 in this embodiment includes the positioning fixture 100 as described above, and therefore has all the beneficial effects of the positioning fixture 100 described above, which will not be repeated here.

[0109] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0110] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0111] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0112] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A positioning fixture (100), characterized in that, The positioning fixture (100) includes: Ontology(110); A connector (120), connected to the body (110), is used to insert into a sleeve (200) of the battery pack housing to position the sleeve (200) relative to the battery pack housing; and An elastic element (130) is connected to the body (110) and is used to elastically support the sleeve (200).

2. The positioning fixture (100) according to claim 1, characterized in that, The elastic element (130) is configured as a columnar spring; The columnar spring surrounds the connector (120).

3. The positioning fixture (100) according to claim 1, characterized in that, The elastic element (130) has a compressed state, in which the dimension of the elastic element (130) along the first direction is the compressed dimension (L1); The sleeve (200) includes: a tail (210), the tail (210) having a first dimension (L2) along a first direction; Wherein, the compression dimension (L1) is greater than or equal to the first dimension (L2).

4. The positioning fixture (100) according to claim 3, characterized in that, The sleeve (200) has a receiving space (200a); At least a portion of the connector (120) is configured to be located within the receiving space (200a) to limit the displacement of the sleeve (200) in the second direction; The first direction intersects with the second direction.

5. The positioning fixture (100) according to any one of claims 1 to 4, characterized in that, The positioning fixture (100) also includes: A decoupling element (140) is configured to disconnect the connector (120) from the sleeve (200); The decoupling element (140) is connected to the body (110).

6. The positioning fixture (100) according to claim 5, characterized in that, The body (110) is formed of: Through hole (110a) is provided along the first direction; The decoupling member (140) is partially located within the through hole (110a) so that a force can be applied to the battery pack housing (300) to disengage the connector (120) from the sleeve (200).

7. The positioning fixture (100) according to any one of claims 1 to 4, characterized in that, The positioning fixture (100) also includes: The limiting member (150) is configured to limit the displacement of the battery pack housing (300) along a first direction; The limiting member (150) is connected to the body (110).

8. The positioning fixture (100) according to any one of claims 1 to 4, characterized in that, The second dimension (L3) of the connector (120) along the first direction is greater than or equal to three-quarters of the third dimension (L4) of the sleeve (200) along the first direction; and / or The difference between the outer radial dimension of the connector (120) and the inner radial dimension of the head (220) of the sleeve (200) ranges from 0.1 mm to 0.25 mm.

9. The positioning fixture (100) according to any one of claims 1 to 4, characterized in that, The positioning fixture (100) also includes: The support (160) is fixedly connected to the body (110).

10. A processing system (10), characterized in that, Includes a positioning fixture (100) as described in any one of claims 1 to 9 and a welding device, the welding device being used to weld the sleeve (200) of the battery pack housing.

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