Positioning inner supporting mechanism at front end of front axle plate

Abstract

The invention belongs to the technical field of forklift assembly, and particularly discloses a front axle plate front end positioning inner supporting mechanism which comprises a clamping device, the clamping device comprises a set of positioning headstock used for clamping the front end of a left front axle plate and the front end of a right front axle plate, the inner supporting mechanism further comprises an inner supporting device, and the inner supporting device comprises a connecting support fixedly connected with the clamping device; an inner supporting lead screw is rotationally connected into the connecting support, inner supporting pieces are in threaded connection with the two ends of the inner supporting lead screw respectively, the inner supporting lead screw is rotated to enable the two inner supporting pieces to move face to face or back to back, and the inner supporting pieces located at the same end and the positioning head frame conduct inner and outer clamping positioning on the front end of a front axle plate together. The positioning headstock on the clamping device is located on the outer sides of the front ends of the left front axle plate and the right front axle plate for clamping, and the inner supporting piece of the inner supporting device is located on the inner sides of the front ends of the left front axle plate and the right front axle plate, so that the outer side and the inner side of the front axle plate are clamped and positioned at the same time, deformation of the front axle plate during welding is prevented, correction after welding is avoided, and labor intensity is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of forklift assembly, and particularly relates to a positioning and inner bracing mechanism at the front end of the front axle plate of a forklift frame. Background Art

[0002] The forklift frame is of a box structure, which is formed by welding steel plates and mainly includes components such as left and right front axle plates, reinforcing plates, legs, and a chassis. The front end of the forklift frame is rigidly fixed on the drive axle, the rear end is connected to the steering axle through a hinge shaft, and the legs and the chassis are welded together to form an integral frame. Before welding and assembly, the front axle plate needs to be positioned and then welded and assembled with the chassis or leg components of the frame.

[0003] The existing clamping method is to fix the head and tail of the forklift frame on the head and tail positioning fixtures of the positioner respectively. Currently, the front end of the front axle plate is positioned by a clamping device, and its structure is as Figure 1 shown. The clamping device 1 includes a base 11, two positioning head frames 12 symmetrically and slidably mounted on the base 11, and positioning shafts 13 fixedly mounted on the positioning head frames. During positioning, the arc surfaces of the left and right front axle plates 2 are clamped on the corresponding positioning shafts 13, and then the two positioning head frames 12 move towards the middle to clamp the front axle plate. However, in this positioning method, due to the lack of effective inner limiting of the front axle plate, after the forklift frame is welded, the left and right front axle plates tend to deform inward, resulting in errors in the connection with the drive axle. Therefore, the front axle plate still needs to be corrected manually after welding.

[0004] This application designs a special fixture mechanism that can be integrated into the original positioner head fixture, which can quickly and effectively realize the inner bracing effect on the left and right front axle plates of the frame, prevent the inward deformation of the front axle plate during welding, avoid post-welding correction, and reduce labor intensity. Summary of the Invention

[0005] In order to solve the above problem of the deformation of the front axle plate, the present invention provides a positioning and inner bracing mechanism at the front end of the front axle plate, which can quickly and effectively limit the front and inner sides of the front axle plate simultaneously, prevent the deformation of the front axle plate during welding, avoid post-welding correction, and reduce labor intensity.

[0006] The technical solution of the present invention is as follows:

[0007] A positioning and inner bracing mechanism at the front end of the front axle plate includes a clamping device. The clamping device includes a set of positioning head frames for clamping the front ends of the left and right front axle plates. It further includes an inner bracing device. The inner bracing device includes a connection support fixedly connected to the clamping device. An inner bracing screw rod is rotatably connected in the connection support. The two ends of the inner bracing screw rod are respectively threadedly connected with inner bracing members. Rotating the inner bracing screw rod makes the two inner bracing members move towards or away from each other. The inner bracing members at the same end and the positioning head frames together perform inner and outer clamping and positioning on the front end of one front axle plate.

[0008] Further solution: The connecting support includes a mounting seat with a through hole, and the inner support screw rod is installed in the through hole through a bearing and rotates freely in the through hole; two connecting arms are installed on the mounting seat and are in a V-shaped structure, and a connecting plate fixedly connected to the clamping device is fixedly provided at the end of the connecting arm.

[0009] Even further solution: A limiting member for preventing the inner support screw rod from moving axially is installed on the inner support screw rod located in the through hole.

[0010] Preferably, the limiting member includes a spacer sleeve and a locking nut, and the spacer sleeve is located between the locking nut and the bearing.

[0011] Further solution: An anti-rotation guide rod for preventing the inner support member from rotating is installed on the inner support member.

[0012] Even further solution: The anti-rotation guide rod is arranged parallel to the inner support screw rod, one end of the anti-rotation guide rod is inserted into the inner support member, and the other end is inserted into a guide rod fixing piece installed on the connecting support.

[0013] Further solution: A handle is installed at one end of the inner support screw rod for rotating the inner support screw rod.

[0014] Further solution: The inner support screw rod includes a support mounting section connected to the connecting support, stepped bearing mounting sections and limiting sections are respectively provided at both ends of the support mounting section, an inner support member mounting section is provided outside the limiting section, and external threads with opposite thread directions are provided on both inner support member mounting sections.

[0015] Further solution: An internal threaded hole matching the inner support screw rod is provided at the center of the inner support member, and a guide rod hole for the anti-rotation guide rod to pass through is also provided on the inner support member.

[0016] The positioning headstock on the clamping device of the present invention clamps at the outer sides of the front ends of the left and right front bridge plates, and the inner support members of the inner support device are located at the inner sides of the front ends of the left and right front bridge plates. By rotating the inner support screw rod, the two inner support members move towards both sides simultaneously, and then together with the positioning headstock at the same end, they clamp and position the front end of a front bridge plate both inside and outside.

[0017] The beneficial effects of the present invention are:

[0018] An inner support device is connected to the clamping device of the present invention. The positioning headstock on the clamping device clamps at the outer sides of the front ends of the left and right front bridge plates, and the inner support members of the inner support device are located at the inner sides of the front ends of the left and right front bridge plates, so as to clamp and position the front bridge plate both outside and inside, prevent the deformation of the front bridge plate during welding, avoid post-welding correction, and reduce the labor intensity.

[0019] By rotating the inner support screw rod through the handle, the opposite or away movement of the two inner support members is realized, which facilitates the operation; and the left and right front bridge plates can be clamped and positioned simultaneously.

[0020] The present invention effectively utilizes the structural space of the clamping device, and the inner support device is installed on the clamping device, and the whole positioning and supporting mechanism is small in volume. Brief Description of the Drawings

[0021] The present invention will be further described in detail below with reference to the accompanying drawings:

[0022] Figure 1 It is a schematic diagram of the positioning of the clamping device and the front end of the front bridge plate.

[0023] Figure 2 It is a schematic diagram of the structure of the positioning inner support mechanism of the present invention.

[0024] Figure 3 It is a schematic diagram of the structure of the inner support mechanism in the present invention.

[0025] Figure 4 It is Figure 3 The sectional view of

[0026] Figure 5 It is a schematic diagram of the structure of the V-shaped support in the present invention.

[0027] Figure 6 It is a schematic diagram of the structure of the inner support screw rod in the present invention.

[0028] Figure 7 It is a schematic diagram of the structure of the inner support member in the present invention.

[0029] Figure 8 It is a schematic diagram of the positioning of the positioning inner support mechanism and the front end of the front bridge plate in the present invention.

[0030] In the figure: clamping device 1, base 11, positioning headstock 12, positioning shaft 13, connecting seat 14;

[0031] Inner support device 2, connecting support 21, mounting seat 211, connecting arm 212, connecting plate 213,

[0032] Inner support screw rod 22, handle mounting shaft 221, inner support member mounting section 222, bearing mounting section 223, limiting section 224, support mounting section 225,

[0033] Inner support member 23, internal thread hole 231, guide rod hole 232,

[0034] Guide rod fixing piece 24, anti-rotation guide rod 25, spacer 26, locking nut 27, bearing 28, handle 29;

[0035] Front bridge plate 3. Detailed Description of the Invention

[0036] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other.

[0037] In the present application, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation", "fixed installation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0038] Refer to Figure 1-8 , a positioning and inner bracing mechanism at the front end of a front axle plate in this embodiment includes a clamping device 1. The clamping device 1 includes a base 11, and a set of positioning headrests 12 for clamping the front ends of the left and right front axle plates are movably connected to the base 11. A positioning shaft 13 that is clamped to the arc surface at the front end of the front axle plate 3 is fixedly provided on the inner side wall of the positioning headrest 12. A connecting seat 14 extends from the base 11. Specifically, the bottom plates of the two positioning headrests 12 are symmetrically installed on the base through slide rails and can move along the base. After moving into place, bolts can be used to fix them to the base. During positioning, the arc surfaces at the front ends of the left and right front axle plates 3 are clamped on the corresponding positioning shafts 13, and then the two positioning headrests 12 are moved towards the middle to clamp the front ends of the two front axle plates 3.

[0039] It further includes an inner bracing device 2. The inner bracing device 2 includes a connecting support 21 fixedly connected to the clamping device 1. An inner bracing screw 22 is rotatably connected in the connecting support 21. The two ends of the inner bracing screw 22 are respectively threadedly connected with inner bracing members 23. Rotating the inner bracing screw 22 makes the two inner bracing members 23 move towards or away from each other. The inner bracing members 23 at the same end and the positioning headrests 12 together perform internal and external clamping and positioning on the front end of a front axle plate. That is, the two positioning headrests 12 are located outside the front ends of the two front axle plates 3 and apply force towards the middle for clamping. And the inner bracing members 23 are located inside the front ends of the two front axle plates 3. Rotating the inner bracing screw 22 makes the two inner bracing members 23 move away from each other and apply force towards the direction of the front axle plate 3, so as to apply force towards each other with the positioning headrests 12 to clamp and position the front axle plate 3. And it prevents the deformation of the front axle plate during welding, avoids post-welding correction, and reduces the labor intensity.

[0040] Such as Figure 3-5As shown in the figure, the connecting support 21 includes a mounting base 211 with a through hole. The inner support screw rod 22 is installed in the through hole through a bearing 28 and rotates freely in the through hole. The bearing 28 can be a deep groove ball bearing to improve the smoothness of the rotation of the inner support screw rod, thus facilitating the rotation operation. Two connecting arms 212 are installed on the mounting base 211 and are in a V-shaped structure. The ends of the connecting arms 212 are fixedly provided with connecting plates 213 fixedly connected to the clamping device 1. The two connecting arms 212 are in a V-shaped structure, which facilitates the fixed connection of both connecting plates 213 to the connecting seat 14 extending on the base 11, and bolts can be used for the connection.

[0041] In another embodiment, a limiting member for preventing the inner support screw rod 22 from moving axially is installed on the inner support screw rod 22 located in the through hole.

[0042] Preferably, the limiting members are two and are symmetrically arranged at both ends of the through hole respectively. The limiting member includes a spacer sleeve 26 and a locking nut 27. The spacer sleeve 26 is located between the locking nut 27 and the bearing 28. The spacer sleeve 26 is sleeved on the inner support screw rod, and the locking nut 27 is fixed on the inner support screw rod. When the inner support screw rod rotates, the inner support screw rod and the inner ring of the bearing 28 rotate together in the outer ring of the bearing, and at the same time drive the locking nut 27 to rotate together. The locking nut 27 relatively positions the outer ring of the bearing through the spacer sleeve 26, thereby preventing the axial movement of the inner support screw rod.

[0043] In another embodiment, an anti-rotation guide rod 25 for preventing the inner support member 23 from rotating is installed on the inner support member 23. The anti-rotation guide rod 25 is arranged parallel to the inner support screw rod. One end of the anti-rotation guide rod is inserted into the inner support member 23, and the other end is inserted into a guide rod fixing piece 24 installed on the connecting support 21. The guide rod fixing piece 24 is fixedly installed on the mounting base 211 through bolts. Since the guide rod fixing piece 24 is fixed, the inner support member connected by the anti-rotation guide rod 25 is also immovable in the circumferential direction, that is, its circumferential rotation can be avoided. And the anti-rotation guide rod 25 is movably inserted into the inner support member 23, so the inner support member 23 can move along the anti-rotation guide rod 25, that is, the anti-rotation guide rod 25 also plays a guiding role.

[0044] In a further solution, a handle 29 is installed at one end of the inner support screw rod 22 for rotating the inner support screw rod 22. When it is necessary to adjust the distance between the two inner support members, the inner support screw rod can be rotated through the handle 29 for operation.

[0045] As Figure 6As shown in the figure, the inner support screw rod 22 includes a support mounting section 225 connected to the connection support 21. At both ends of the support mounting section 225, there are respectively provided stepped bearing mounting sections 223 and limit sections 224. On the outer side of the limit section 224, there is provided an inner support member mounting section 222. External threads with opposite thread directions are provided on both of the inner support member mounting sections 222. A handle mounting shaft 221 is fixedly provided at one end of the inner support screw rod 22 for connecting with the handle 29.

[0046] During assembly, first install the bearings 28 on the two bearing mounting sections 223 of the inner support screw rod 22 respectively, then pass it through the through holes on the mounting seat 211, and then install the spacer sleeves 26 and locking nuts 27 on the limit sections 224 outside the bearings respectively to limit the axial movement of the inner support screw rod. Then threadedly install the two inner support members 23 on the two inner support member mounting sections 222 respectively.

[0047] As Figure 7 shown in the figure, the shape of the inner support member 23 in the present invention is not limited and can be a circular, square or special-shaped structure. In this embodiment, it can be selected as a circular structure to facilitate the support of the inner side of the front bridge plate. An inner threaded hole 231 matching the inner support screw rod 22 is provided at the center of the inner support member 23, and a guide rod hole 232 for the anti-rotation guide rod 25 to pass through is also provided on the inner support member 23.

[0048] As Figure 8 This is a schematic diagram of the positioning inner support mechanism of the present invention for positioning the front end of the front bridge plate. First, rotate the handle 29 in a certain direction to make the left and right inner support members 23 move relatively towards the center direction to release the clamping space; then place the arc-shaped surfaces at the front ends of the left and right front bridge plates 3 on the positioning shafts 13 on the corresponding sides of the clamping device 1, and then move the two positioning head frames 12 towards the middle to clamp the front ends of the two front bridge plates 3 and fix the positioning head frames 12 on the base 11; finally, rotate the handle 29 in the opposite direction, and the inner support members 23 move outward to press against the inner side wall of the front bridge plate, that is, apply force in the opposite direction to the positioning head frame 12 to clamp and position the front bridge plate 3. Thereby, the deformation of the front bridge plate during welding is prevented, the post-welding correction is avoided, and the labor intensity is reduced.

[0049] After welding is completed, rotate the handle again to loosen the inner support member, and then loosen the fixing bolts of the positioning head frame 12 to loosen the positioning head frame 12 and complete the removal work.

[0050] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combinations of these technical features do not conflict, they should all be considered to be within the scope described in this specification.

Claims

1. A positioning and inner bracing mechanism for the front end of a front axle plate, comprising a clamping device (1), and the clamping device (1) includes a set of positioning headrests (12) for clamping the front ends of the left and right front axle plates, characterized in that: It further includes an inner support device (2). The inner support device (2) includes a connection support (21) fixedly connected to the clamping device (1). An inner support screw rod (22) is rotatably connected in the connection support (21). Both ends of the inner support screw rod (22) are respectively threadedly connected with inner support members (23). By rotating the inner support screw rod (22), the two inner support members (23) move towards or away from each other. The inner support members (23) at the same end and the positioning headstock (12) together perform internal and external clamping and positioning on the front end of a front bridge plate.

2. The positioning inner support mechanism according to claim 1, wherein: The connection support (21) includes a mounting seat (211) provided with a through hole. The inner support screw rod (22) is installed in the through hole through a bearing (28) and freely rotates in the through hole. Two connecting arms (212) are installed on the mounting seat (211) and are in a V-shaped structure. A connecting plate (213) fixedly connected to the clamping device (1) is fixedly provided at the end of the connecting arm (212).

3. The positioning inner support mechanism according to claim 2, characterized in that: A limiting member for preventing the inner support screw rod from moving axially is installed on the inner support screw rod (22) located in the through hole.

4. The positioning inner support mechanism according to claim 3, characterized in that: The limiting member includes a spacer sleeve (26) and a locking nut (27). The spacer sleeve (26) is located between the locking nut (27) and the bearing (28).

5. The positioning inner support mechanism according to claim 1, characterized in that: An anti-rotation guide rod (25) for preventing it from rotating is installed on the inner support member (23).

6. The positioning inner support mechanism according to claim 5, characterized in that: The anti-rotation guide rod (25) is arranged parallel to the inner support screw rod. One end of the anti-rotation guide rod is inserted into the inner support member (23), and the other end is inserted into a guide rod fixing piece (24) installed on the connection support (21).

7. The positioning inner support mechanism according to claim 1, wherein: A handle (29) is installed at one end of the inner support screw rod (22) for rotating the inner support screw rod (22).

8. The positioning inner support mechanism according to claim 1, characterized in that: The inner support screw rod (22) includes a support mounting section (225) connected to the connection support (21). At both ends of the support mounting section (225), there are respectively provided stepped bearing mounting sections (223) and limiting sections (224). An inner support member mounting section (222) is provided outside the limiting section (224). External threads with opposite thread directions are provided on both of the inner support member mounting sections (222).

9. The positioning inner support mechanism according to claim 1, wherein: An internal thread hole (231) matching the inner support screw rod (22) is provided at the center of the inner support member (23). A guide rod hole (232) for the anti-rotation guide rod (25) to pass through is also provided on the inner support member (23).

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