Positioning tool and positioning installation structure for welding whole metal fuel tank

Abstract

The invention discloses a positioning tool and a positioning installation structure for welding of a whole metal fuel tank in the technical field of metal fuel tank welding, the positioning tool comprises a base and a clamping mechanism arranged on the base, a plurality of profiling supports are arranged on the base at intervals around the clamping mechanism, and the clamping mechanism comprises a positioning part, a locking part and a telescopic air cylinder; the cross section of the positioning piece is round, the locking piece comprises a connecting piece and at least two locking claws, one end of each locking claw is a connecting part, the other end of each locking claw is a clamping part, the hinge part is located between the connecting part and the clamping part, the connecting part is hinged to the output end of the telescopic air cylinder, the first end of the connecting piece is hinged to the hinge part, and the second end of the connecting piece is hinged to the base; the positioning piece is located above the telescopic air cylinder and provided with an avoiding groove for avoiding the locking claw. The technical problems that in the prior art, operation is tedious, large personal errors exist, the welding precision is difficult to guarantee, and normal assembly of products is possibly affected are solved.

Description

Technical Field

[0001] The invention relates to the technical field of metal fuel tank welding, and in particular to a positioning tool and a positioning installation structure for whole-box welding of a metal fuel tank. Background Art

[0002] In the production process of metal fuel tanks, stamping or casting processes are usually used to manufacture the various components that make up the fuel tank. Subsequently, these scattered components need to be connected by welding technology to form a complete fuel tank.

[0003] Traditionally, the welding of fuel tanks mostly relies on operators holding welding torches to perform operations. The positioning device used is generally fixed by manually operating the clamping device, which requires manual adjustment and manipulation of the positioning device according to the shape and size of the fuel tank. This is not only cumbersome to operate, affecting the production efficiency of the fuel tank, but also prone to human errors, affecting the accuracy of positioning, which in turn makes it difficult to ensure welding accuracy, resulting in a large deviation between the finished fuel tank and the design drawing. This deviation not only affects the dimensional accuracy of the fuel tank itself, but may also cause interference with other components during the vehicle assembly stage, thereby hindering the normal assembly of the product. Summary of the invention

[0004] In order to solve the technical problems that the prior art is complicated to operate and has large human errors, which makes it difficult to ensure welding accuracy and may affect the normal assembly of the product, the present invention provides a positioning tool and a positioning installation structure for the welding of the entire metal fuel tank with automatic locking and positioning.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] The positioning tool used for welding the entire metal fuel tank comprises a base and a clamping mechanism arranged on the base, and also comprises a plurality of profiling supports arranged on the base, the plurality of profiling supports are arranged at intervals around the clamping mechanism, the clamping mechanism comprises a positioning member, a locking member and a telescopic cylinder, the cross section of the positioning member is circular, the locking member comprises a connecting member and at least two locking claws, one end of the locking claw is a connecting part, the other end is a clamping part, a hinged part is arranged between the connecting part and the clamping part, the connecting part is hinged to the output end of the telescopic cylinder, and the connection The first end of the member is hinged to the hinge part, and the second end is hinged to the base. The locking claws are arranged at intervals around the central axis of the output shaft of the telescopic cylinder. The positioning member is located on the telescopic cylinder. The positioning member is provided with an avoidance groove for avoiding the locking claws. When the locking claws are in a retracted state, the horizontal projection of the clamping part falls into the positioning member. When the locking claws are in an extended state, the locking claws are extended outward through the avoidance groove of the positioning member, and the horizontal projection of the clamping part falls outside the positioning member. The locking claws of the locking member are pushed up and down by the telescopic cylinder, and are switched between retracting and extending.

[0007] Furthermore, the locking claw includes a first straight section, a second straight section and a bent section connected between the first straight section and the second straight section, the bent section is perpendicular to the first straight section and the second straight section respectively, and the bent section transitions to the first straight section and the second straight section respectively through an arc structure.

[0008] Furthermore, a protrusion extends vertically downward from one end of the second straight section, and the protrusion is the clamping portion.

[0009] Furthermore, it also includes a support frame arranged on the base, the clamping mechanism is connected to the base through the support frame, the positioning member and the telescopic cylinder are fixedly arranged on the support frame, and the second end of the connecting member is hinged to the support frame.

[0010] Furthermore, a connecting block is provided at the output end of the telescopic cylinder, and the locking claw is hinged to the telescopic cylinder via the connecting block.

[0011] Furthermore, the number of the locking claws is two.

[0012] Further, the number of the contoured supports is six.

[0013] Furthermore, a handle for carrying is installed on the base.

[0014] Furthermore, the positioning and installation structure includes the positioning tooling for welding the entire metal fuel tank as described in any one of the above embodiments, and also includes a fuel tank, the bottom of the fuel tank has an oil pump hole that penetrates the tank body of the fuel tank, the fuel tank is placed on a contoured support, the shape of the contoured support is adapted to the outer contour of the fuel tank, the positioning piece is matched with the gap between the oil pump hole, and when the locking claw is fully extended, the clamping portion of the locking claw contacts the inner wall of the fuel tank, and the clamping portion applies pressure to the inner wall of the fuel tank.

[0015] The beneficial effects of the present invention are:

[0016] 1. Combination of clamping mechanism and contour support: The clamping mechanism on the base fixes the main fixed point, and the multiple contour supports arranged around it provide all-round support, which can ensure the accurate position of each component of the fuel tank before welding, avoid the movement of the workpiece during welding, and reduce the risk of deformation of the fuel tank during welding, thereby improving welding accuracy. The locking claw is driven by a telescopic cylinder to achieve automatic clamping and release, which increases the flexibility of the equipment, improves the automation of the welding process, reduces manual intervention, and thus improves welding accuracy and production efficiency.

[0017] 2. Geometry optimization of the locking claw: The locking claw adopts the design of the first straight section, the second straight section and the bent section. The design of the bent section allows the locking claw to better fit the inner wall of the fuel tank, increasing the stability of the contact between the locking claw and the inner wall of the fuel tank. At the same time, the arc transition reduces stress concentration and extends the service life of the locking claw. In addition, when the locking claw is unfolded, the bent section can provide a lever effect relative to the contact position between the clamping part and the inner wall of the fuel tank, so that the locking claw can generate a greater clamping force under the same driving force. This is because the length of the force arm increases, and the torque also increases accordingly.

[0018] 3. Enhanced clamping force: The protrusion extending vertically downward serves as the clamping part, which enhances the grip on the inner wall of the fuel tank, ensures the fixity of the position of the fuel tank during the welding process, and can better fit the inner wall of the fuel tank.

[0019] 4. The design of the support frame strengthens the connection between the clamping mechanism and the base, improves the structural stability and reliability of the entire device, simplifies other installation structures, and makes it easier to maintain or adjust the clamping mechanism.

[0020] 5. Improved connection method: The connection block design between the output end of the telescopic cylinder and the locking claw simplifies the assembly process and also facilitates later maintenance and replacement of parts.

[0021] 6. Determination of the number of locking claws: The number of locking claws is set to two, which can effectively clamp the fuel tank without increasing the complexity due to too many locking claws, thus maintaining the simplicity of the system.

[0022] 7. Number of contour supports: Six contour supports are sufficient to provide adequate support without overly complicating the equipment structure.

[0023] 8. Adding a handle: Installing a handle on the base facilitates the movement of the entire device and improves the convenience of operation, which is especially practical when frequent moving is required in the workshop.

[0024] 9. Overall benefits of the positioning installation structure: The structure includes the cooperation between the positioning piece and the fuel tank pump hole, and the contact between the locking claw and the inner wall of the fuel tank, which ensures the precise alignment of the fuel tank during welding. This structure not only improves welding accuracy, but also simplifies the operation steps and reduces the possibility of human error, thereby improving welding quality and consistency of finished products. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a positioning tool for welding a metal fuel tank of the present invention;

[0026] Figure 2 yes Figure 1 Front view;

[0027] Figure 3 It is a structural schematic diagram of the clamping mechanism;

[0028] Figure 4 yes Figure 3 Right side view of the upper positioning piece installed;

[0029] Figure 5 It is a structural schematic diagram of the positioning installation structure;

[0030] Marked in the figure are, 1-base, 2-contact support, 3-positioning piece, 31-avoidance groove, 4-telescopic cylinder, 5-connecting piece, 6-locking claw, 61-connecting part, 62-clamping part, 63-hinge part, 64-first straight section, 65-second straight section, 66-bending section, 7-support frame, 8-connecting block, 9-handle, 10-fuel tank, 11-oil pump hole. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the embodiments of the present application more clearly expressed, the present invention is further described below in conjunction with the accompanying drawings.

[0032] First of all, it needs to be stated that the technical solutions of the embodiments of the present application are clearly and completely described. The described embodiments are part of the embodiments of the present application, and are not limitations of the present invention. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0033] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as “first”, “second”, “upper”, “lower”, “left”, “right”, “inner”, “outer”, “axial” or “radial” are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention. They are not intended to indicate or imply that the device or element referred to must have a specific orientation structure and operation, and therefore cannot be understood as a limitation on the present invention.

[0034] It should be noted that, in the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Reference Figures 1 to 5 The present invention provides a positioning tool and a positioning installation structure for welding a metal fuel tank.

[0036] like Figures 1 to 4 As shown, in some embodiments, a positioning tool for welding a metal fuel tank comprises a base 1 and a clamping mechanism arranged on the base 1, and also comprises a plurality of contour supports 2 arranged on the base 1, the plurality of contour supports 2 are arranged at intervals around the clamping mechanism, the clamping mechanism comprises a positioning member 3, a locking member and a telescopic cylinder 4, the cross section of the positioning member 3 is circular, the locking member comprises a connecting member 5 and at least two locking claws 6, one end of the locking claw 6 is a connecting portion 61, and the other end is a clamping portion 62, a hinged portion 63 is arranged between the connecting portion 61 and the clamping portion 62, and the connecting portion 61 is hinged to the output end of the telescopic cylinder 4 The first end of the connecting member 5 is hinged to the hinged portion 63, and the second end is hinged to the base 1. The locking claws 6 are arranged at intervals around the central axis of the output shaft of the telescopic cylinder 4. The positioning member 3 is located on the telescopic cylinder 4. The positioning member 3 is provided with an avoidance groove 31 for avoiding the locking claw 6. When the locking claw 6 is in a retracted state, the horizontal projection of the clamping portion 62 falls into the positioning member 3. When the locking claw 6 is in an extended state, the locking claw 6 is extended outward through the avoidance groove 31 of the positioning member 3, and the horizontal projection of the clamping portion 62 falls outside the positioning member 3. The locking claw 6 of the locking member is pushed up and down by the telescopic cylinder 4 to switch between retraction and extension.

[0037] like Figure 2 , Figure 3 and Figure 5 As shown, the working process is as follows: when the telescopic cylinder 4 is retracted inward, the connecting block 8 descends, and the locking claw 6 rotates inward under the action of the connecting portion 61 and the hinged portion 63 to be retracted, and the connecting member 5 rotates inward under the action of the hinged portion 63, and the locking claw 6 is in a contracted and closed state. The mechanical arm grabs the fuel tank 10 and places it in the area restricted by the multiple contoured supports 2 of the positioning tooling, and the positioning member 3 is penetrated in the oil pump hole 11 and is clearance-matched. When the telescopic cylinder 4 is extended outward, the connecting block 8 rises, and the locking claw 6 is under the action of the connecting portion 61 and the hinged portion 63. The connecting member 5 is rotated outward to unfold. The connecting member 5 is rotated outward under the action of the hinge 63. The locking claw 6 passes through the avoidance groove 31 of the positioning member 3 and opens toward the edge of the oil pump hole 11 until the locking claw 6 presses the inner wall of the fuel tank 10. The outer contour of the fuel tank 10 fits firmly with the contoured support 2 to achieve precise positioning. The welding wheel of the welding robot rolls around the fuel tank 10 in a full circle to complete the welding of the entire fuel tank 10. The telescopic cylinder 4 is retracted inward, the locking claw 6 contracts and closes, and the robotic arm grabs the fully welded fuel tank 10 and sends it to the next process.

[0038] The positioning member 3 is adapted to the size of the fuel pump hole 11 of the fuel tank 10 and has clearance fit, thereby realizing the positioning of the fuel tank 10. The cross section of the positioning member 3 is circular, which means that the positioning member 3 can be a cylinder or a truncated cone.

[0039] Under the pushing action of the telescopic cylinder 4, the locking claw 6 rotates at a certain angle around its own hinged portion 63. The connecting portion 61 of the locking claw 6 can be directly hinged to the output end of the telescopic cylinder 4, or indirectly hinged through the connecting block 8. The clamping portion 62 and the inner wall of the fuel tank 10 are preferably clamped by surface contact to obtain a better clamping effect without damaging the inner wall of the fuel tank 10.

[0040] The number of the locking claws 6 is preferably two, and three or more may also be selected according to actual conditions, and there is no particular limitation here.

[0041] Six contour supports 2 are preferred, and other numbers of contour supports 2 may be used, such as three, four, five or more, as long as the fuel tank 10 can be stably supported.

[0042] like Figure 3 As shown, in some embodiments, the locking claw 6 includes a first straight section 64, a second straight section 65, and a bent section 66 connected between the first straight section 64 and the second straight section 65, the bent section 66 is perpendicular to the first straight section 64 and the second straight section 65, respectively, and the bent section 66 transitions with the first straight section 64 and the second straight section 65 through an arc structure.

[0043] One end of the first straight section 64 is hinged to the output end of the telescopic cylinder 4, and the end of the second straight section 65 away from the first straight section 64 is the clamping portion 62. The first straight section 64 and the second straight section 65 are connected by a bent section 66. The locking claw 6 adopts the design of the first straight section 64, the second straight section 65 and the bent section 66. The design of the bent section 66 allows the locking claw 6 to better fit the inner wall of the fuel tank 10, thereby increasing the stability of the contact between the locking claw 6 and the inner wall of the fuel tank 10. At the same time, through the arc transition, stress concentration is reduced, and the service life of the locking claw 6 is extended. In addition, when the locking claw 6 is unfolded, the bent section 66 can provide a lever effect relative to the contact position between the clamping portion 62 and the inner wall of the fuel tank 10, so that under the same driving force, the locking claw 6 can generate a greater clamping force. This is because the length of the force arm increases, and the torque also increases accordingly.

[0044] like Figure 3 As shown, in some embodiments, a protrusion extends vertically downward at one end of the second straight section 65, and the protrusion is the clamping portion 62. The protrusion extending vertically downward serves as the clamping portion 62, which enhances the gripping force on the inner wall of the fuel tank 10, ensures the fixity of the position of the fuel tank 10 during the welding process, and can better fit the inner wall of the fuel tank 10.

[0045] like Figure 1 and Figure 3As shown, in some embodiments, a support frame 7 is further included which is arranged on the base 1, the clamping mechanism is connected to the base 1 through the support frame 7, the positioning member 3 and the telescopic cylinder 4 are fixedly arranged on the support frame 7, and the second end of the connecting member 5 is hinged to the support frame 7. The support frame 7 can be an integral member or a split support frame 7, the support frame 7 is installed on the base 1, and the height and size of the support frame 7 are set to adapt to the relative position relationship of the positioning member 3, the telescopic cylinder 4 and the locking claw 6.

[0046] like Figure 3 As shown, in some embodiments, a connection block 8 is provided at the output end of the telescopic cylinder 4, and the locking claw 6 is hinged to the telescopic cylinder 4 through the connection block 8. The design of the connection block 8 between the output end of the telescopic cylinder 4 and the locking claw 6 simplifies the assembly process, and is also convenient for later maintenance and replacement of parts. The shape of the connection block 8 is adapted to the number of the locking claws 6, so that the locking claw 6 is hinged to the output end of the telescopic cylinder 4 without damaging the output shaft of the telescopic cylinder 4. The connection block 8 is used for transition, and the connection block 8 is sleeved on the output shaft and fixed, which is convenient for disassembly and maintenance.

[0047] like Figure 3 As shown, in some embodiments, there are two locking claws 6. Setting the number of locking claws 6 to two can effectively clamp the fuel tank 10 without increasing the complexity due to too many locking claws 6, thus maintaining the simplicity of the system.

[0048] like Figure 1 As shown, in some embodiments, the number of the contoured supports 2 is six. The number of six contoured supports 2 can provide sufficient support force without overly complicating the device structure.

[0049] like Figure 1 As shown, in some embodiments, a handle 9 for carrying is installed on the base 1. The handle 9 installed on the base 1 facilitates the movement of the entire device and improves the convenience of operation, especially when it needs to be moved frequently in a workshop.

[0050] like Figure 1 and Figure 5 As shown, in some embodiments, the positioning and installation structure includes the positioning tooling for welding the entire metal fuel tank as described in any of the above embodiments, and also includes a fuel tank 10, the bottom of the fuel tank 10 has an oil pump hole 11 that penetrates the tank body of the fuel tank 10, the fuel tank 10 is placed on the contour support 2, the shape of the contour support 2 is adapted to the outer contour of the fuel tank 10, the positioning member 3 is clearance-matched with the oil pump hole 11, and when the locking claw 6 is fully extended, the clamping portion 62 of the locking claw 6 contacts the inner wall of the fuel tank 10, and the clamping portion 62 applies pressure to the inner wall of the fuel tank 10.

[0051] Since the present positioning and mounting structure adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

Claims

1. A positioning tool for welding a metal fuel tank, comprising a base (1) and a clamping mechanism arranged on the base (1), wherein: The invention also comprises a plurality of contour supports (2) arranged on the base (1), the plurality of contour supports (2) being arranged at intervals around the clamping mechanism, the clamping mechanism comprising a positioning member (3), a locking member and a telescopic cylinder (4), the positioning member (3) having a circular cross section, the locking member comprising a connecting member (5) and at least two locking claws (6), one end of the locking claw (6) being a connecting portion (61) and the other end being a clamping portion (62), a hinged portion (63) being arranged between the connecting portion (61) and the clamping portion (62), the connecting portion (61) being hinged to the output end of the telescopic cylinder (4), the first end of the connecting member (5) being hinged to the hinged portion (63) and the second end being hinged to the base (1) is hinged, the locking claws (6) are arranged at intervals around the central axis of the output shaft of the telescopic cylinder (4), the positioning member (3) is located on the telescopic cylinder (4), and the positioning member (3) is provided with an avoidance groove (31) for avoiding the locking claw (6). When the locking claw (6) is in a retracted state, the horizontal projection of the clamping part (62) falls into the positioning member (3), and when the locking claw (6) is in an extended state, the locking claw (6) is extended outward through the avoidance groove (31) of the positioning member (3), and the horizontal projection of the clamping part (62) falls outside the positioning member (3). The locking claw (6) of the locking member is switched between retracting and extending by being pushed up and down by the telescopic cylinder (4).

2. The positioning tool for welding the entire metal fuel tank according to claim 1 is characterized by: The locking claw (6) comprises a first straight section (64), a second straight section (65), and a bent section (66) connected between the first straight section (64) and the second straight section (65); the bent section (66) is perpendicular to the first straight section (64) and the second straight section (65), and the bent section (66) transitions with the first straight section (64) and the second straight section (65) through an arc structure.

3. The positioning tool for welding the entire metal fuel tank according to claim 2 is characterized by: One end of the second straight section (65) extends vertically downward to form a protrusion, which is the clamping portion (62).

4. The positioning tool for welding the entire metal fuel tank according to claim 1 is characterized by: It also includes a support frame (7) arranged on the base (1), the clamping mechanism is connected to the base (1) through the support frame (7), the positioning member (3) and the telescopic cylinder (4) are fixedly arranged on the support frame (7), and the second end of the connecting member (5) is hinged to the support frame (7).

5. The positioning tool for welding the entire metal fuel tank according to claim 1 is characterized by: A connecting block (8) is provided at the output end of the telescopic cylinder (4), and the locking claw (6) is hingedly connected to the telescopic cylinder (4) via the connecting block (8).

6. The positioning tool for welding the entire metal fuel tank according to claim 1, characterized in that: The number of the locking claws (6) is two.

7. The positioning tool for welding the entire metal fuel tank according to claim 1 is characterized by: The number of contoured supports (2) is six.

8. The positioning tool for welding the entire metal fuel tank according to claim 1 is characterized by: A handle (9) for carrying is installed on the base (1).

9. A positioning and mounting structure, comprising a positioning tool for welding a metal fuel tank as claimed in any one of claims 1 to 8, and also comprising a fuel tank (10), wherein the bottom of the fuel tank (10) has an oil pump hole (11) penetrating the tank body of the fuel tank (10), and wherein: The fuel tank (10) is placed on the contour support (2), the shape of the contour support (2) is adapted to the outer contour of the fuel tank (10), the positioning piece (3) is clearance-matched with the oil pump hole (11), and when the locking claw (6) is fully extended, the clamping portion (62) of the locking claw (6) contacts the inner wall of the fuel tank (10), and the clamping portion (62) applies pressure to the inner wall of the fuel tank (10).

Images