Special lifting appliance for casting sand core

Abstract

The utility model discloses a special lifting appliance for casting a sand core. The special lifting appliance comprises a lifting appliance main body and a clamping and limiting mechanism, the lifting appliance main body comprises a cross beam, lifting lugs and a lifting ring, the lifting lugs are fixed at the top end of the cross beam, and the top ends of the lifting lugs are connected with the lifting ring; the clamping limiting mechanism comprises a fixing plate, clamping arms, a bottom plate, an air cylinder, a manual valve and a balance weight pressing plate, the clamping arms are arranged on the two sides of the cross beam, the upper portions of the clamping arms are connected with cross beam connecting shafts, and the clamping arms are movably connected with the cross beam through the cross beam connecting shafts. The bottom ends of the clamping arms are fixed to the bottom plate, and the inner side of the bottom plate is connected with the fixing plate. According to the device, the air cylinder is controlled to expand and loosen mainly through the manual valve, then the clamping and limiting mechanism is controlled to reduce the gap between the casting mold and the sand core, and meanwhile the sand core can be prevented from being collided and scratched; and meanwhile, a counterweight pressing plate is additionally arranged at the upper part of the device, so that the overall weight is increased, the overall balance of the device is improved, the sand core can automatically sink and be immersed into the coating during casting, the sand core is completely immersed, and the production quality of the sand core is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sand core hangers, in particular to a special hanger for casting sand cores. Background Art

[0002] In the prior art, after the sand core is made and dried, it needs to be immersed in paint to prevent leakage and sand sticking. Since the sand core is soft and light, it needs to be left to stand for a period of time after being immersed in the paint.

[0003] The existing hangers for casting sand cores are mostly two sets of cross-X-shaped hangers connected to the lifting equipment through lifting rings when in use. When in use, the hangers are pulled up by the lifting equipment to achieve automatic clamping, and are pressed down to automatically release. As a result, due to the lack of limiting components when realizing the clamping function, the sand core is easily damaged due to excessive clamping force. In addition, the hangers and sand cores are light, so when the sand core is immersed in the dipping liquid, it is easy to float, resulting in the sand core being unable to be completely immersed and having to be pressed manually, resulting in high labor intensity in the sand core immersion process and prone to lifting imbalance, which needs to be improved. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] Therefore, the technical problem to be solved by the utility model is to provide a special hanger for casting sand cores, and its purpose is to solve the problem of insufficient practicality of existing devices.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a special hanger for casting sand cores, comprising a hanger body and a clamping and limiting mechanism;

[0007] The main body of the sling comprises a crossbeam, a lifting lug and a lifting ring, wherein the lifting lug is fixed to the top of the crossbeam, and the top of the lifting lug is connected to the lifting ring;

[0008] The clamping and limiting mechanism includes a fixed plate, a clamping arm, a base plate, a cylinder, a manual valve and a counterweight pressure plate. The clamping arms are arranged on both sides of the crossbeam, and the upper part of the clamping arms is connected to the crossbeam connecting shaft, and is movably connected to the crossbeam through the crossbeam connecting shaft; the bottom end of the clamping arm is fixed to the base plate, and the inner side of the base plate is connected to the fixed plate; the cylinder is arranged between the two groups of clamping arms, and the cylinder is connected to the manual valve; both ends of the cylinder are connected to connecting rods, and the two groups of connecting rods are connected to the clamping arm connecting shaft, and are movably connected to the top end of the clamping arm through the clamping arm connecting shaft; the counterweight pressure plate is arranged at the bottom of the crossbeam, and the bottom of the counterweight pressure plate is connected to an anti-slip rubber strip.

[0009] As a preferred solution of the special hanger for casting sand cores described in the utility model, the middle part of the crossbeam is connected to the lifting ear, the upper part of the lifting ear is connected to the limit stop column, and the lifting ring is sleeved on the lifting ear above the limit stop column.

[0010] As a preferred solution of the special hanger for casting sand cores described in the utility model, the clamping and limiting mechanism also includes a rubber strip, and the surfaces of the fixed plate, the bottom plate, the clamping arm and the fixed plate are all connected with the rubber strip to prevent the contact surface of the sand core from being bumped.

[0011] As a preferred solution of the special hanger for casting sand cores described in the utility model, the manual valve is fixed on a mounting plate, the cross section of the mounting plate is an isosceles trapezoidal structure, and the two sides of the mounting plate are fixed on the two sides of the crossbeam.

[0012] As a preferred solution of the special hanger for casting sand cores described in the utility model, the counterweight plate is provided with a weight-reducing through hole, and anti-slip rubber strips are arranged on both sides of the weight-reducing through hole, and multiple groups of anti-slip rubber strips are arranged at equal intervals on the lower surface of the counterweight plate.

[0013] As a preferred solution of the special hanger for casting sand cores described in the utility model, the counterweight pressure plate and the crossbeam are arranged in an "X"-shaped structure, and the angle between the counterweight pressure plate and the crossbeam is less than degrees.

[0014] As a preferred solution of the special hanger for casting sand cores described in the utility model, the clamping and limiting mechanism also includes a connecting plate, and connecting plates are connected to both sides of the bottom end of the clamping arm. The cross-section of the connecting plate is an "L"-shaped structure, and the bottom horizontal part of the connecting plate is connected to the bottom plate. After the clamping arm is connected to the bottom plate, it presents an inverted "T"-shaped structure.

[0015] As a preferred solution of the special hanger for casting sand cores described in the utility model, wherein: the clamping arm includes a left clamping arm and a right clamping arm, the bottom plate includes a left bottom plate and a right bottom plate, the fixed plate includes a left fixed plate and a right fixed plate, the left clamping arm and the right clamping arm are respectively arranged on the left and right sides of the cross beam, the left bottom plate and the right bottom plate are respectively arranged at the bottom ends of the left clamping arm and the right clamping arm, the left fixed plate and the right fixed plate are respectively vertically arranged on the inner sides of the left bottom plate and the right bottom plate, for supporting the casting sand core.

[0016] Beneficial effects of the utility model:

[0017] The utility model proposes a special hanger for casting sand cores, which mainly controls the expansion and loosening of the cylinder through a manual valve, and then controls the clamping limit mechanism to reduce the gap between the casting mold and the sand core, while avoiding the sand core from being bumped or scratched; at the same time, by adding a counterweight pressure plate on the upper part of the device, the overall weight is increased, the overall balance of the device is improved, and the casting sand core can automatically sink into the coating, so that the sand core is completely immersed, thereby improving the production quality of the sand core. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 2 It is a partial enlarged structural schematic diagram of the utility model.

[0021] Figure 3 It is a schematic diagram of the structure of the utility model when viewed from above.

[0022] Figure 4 It is a schematic diagram of the connection structure between the utility model and the sand core.

[0023] In the figure, 100 is the main body of the sling; 101 is the crossbeam; 1011 is the crossbeam connecting shaft; 102 is the lifting lug; 1021 is the limit stop column; 103 is the lifting ring;

[0024] 200, clamping limit mechanism; 201, fixing plate; 2011, left fixing plate; 2012, right fixing plate; 202, clamping arm; 2021, left clamping arm; 2022, right clamping arm; 203, bottom plate; 2031, left bottom plate; 2032, right bottom plate; 204, cylinder; 2041, connecting rod; 2042, clamping arm connecting shaft; 205, manual valve; 2051, mounting plate; 206, counterweight pressure plate; 2061, anti-slip rubber strip; 2062, weight-reducing through hole; 207, rubber strip; 208, connecting plate. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0028] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0029] Reference Figures 1 to 4 , which is the first embodiment of the utility model, provides a special hanger for casting sand cores, and the structure includes a hanger body 100 and a clamping and limiting mechanism 200;

[0030] The sling body 100 includes a crossbeam 101, a lifting ear 102, and a lifting ring 103. The lifting ear 102 is fixed to the top of the crossbeam 101, and the top of the lifting ear 102 is connected to the lifting ring 103; the middle part of the crossbeam 101 is connected to the lifting ear 102, the upper part of the lifting ear 102 is connected to the limit stop column 1021, and the lifting ring 103 is sleeved on the lifting ear 102 above the limit stop column 1021.

[0031] The clamping and limiting mechanism 200 includes a fixed plate 201, a clamping arm 202, a bottom plate 203, a cylinder 204, a manual valve 205, a counterweight plate 206, a rubber strip 207, and a connecting plate 208. The clamping arm 202 includes a left clamping arm 2021 and a right clamping arm 2022. The left clamping arm 2021 and the right clamping arm 2022 are respectively arranged on the left and right sides of the beam 101. The top of each group is connected to a beam connecting shaft 1011 and is movably connected to the beam 101 through the beam connecting shaft 1011. The bottom plate 203 includes a left bottom plate 2031 and a right bottom plate 2032. The left bottom plate 2031 and the right bottom plate 2032 are respectively arranged at the bottom ends of the left clamping arm 2021 and the right clamping arm 2022. The inner side of each group of bottom plates 203 is connected to the fixed plate 201. The plate 201 includes a left fixed plate 2011 and a right fixed plate 2012, which are respectively arranged vertically on the inner sides of the left bottom plate 2031 and the right bottom plate 2032 for supporting the casting sand core; the surfaces of the fixed plate 201, the bottom plate 203, the clamping arm 202 and the fixed plate 201 are all connected with rubber strips 207 to prevent the contact surfaces of the sand core from being bumped; both sides of the bottom end of the clamping arm 202 are connected with connecting plates 208, the cross section of the connecting plate 208 is an "L"-shaped structure, the bottom horizontal part of the connecting plate 208 is connected to the bottom plate 203, and the clamping arm 202 is connected to the bottom plate 203 to form an inverted "T"-shaped structure, which can increase the tightness of the connection between the clamping arm 202 and the bottom plate 203 and extend the service life of the clamping arm 202;

[0032] The cylinder 204 is arranged between the two groups of clamping arms 202, and the cylinder 204 is connected to a manual valve 205 (not shown in the figure). The manual valve 205 is fixed on a mounting plate 2051. The cross section of the mounting plate 2051 is an isosceles trapezoidal structure, and the two sides of the mounting plate 2051 are fixed on the two sides of the beam 101; both ends of the cylinder 204 are connected to connecting rods 2041, and the two groups of connecting rods 2041 are connected to clamping arm connecting shafts 2042, and are movably connected to the top of the clamping arm 202 through the clamping arm connecting shafts 2042; the counterweight pressure plate 206 is arranged at the bottom of the beam 101, and the counterweight pressure plate The bottom of 206 is connected with an anti-skid rubber strip 2061; a weight-reducing through hole 2062 is opened on the counterweight plate 206, and anti-skid rubber strips 2061 are arranged on both sides of the weight-reducing through hole 2062, and multiple groups of anti-skid rubber strips 2061 are arranged at equal intervals on the lower surface of the counterweight plate 206; the counterweight plate 206 and the beam 101 are arranged in an "X" shape structure, and the angle between the counterweight plate 206 and the beam 101 is less than 90 degrees, which can increase the contact area between the device and the sand core and improve the stability of the sand core, and at the same time, it can facilitate the immersion of the sand core in the later stage through its own counterweight, thereby improving the production quality of the sand core.

[0033] In this embodiment: the lifting ring 103 is put on the lifting hook, the manual valve 205 is manually rotated to shrink the cylinder 204, the left clamping arm 2021 and the right clamping arm 2022 are rotated and clamp the sand core, and the four suspended points at the bottom of the sand core are supported by the left fixed plate 2011 and the right fixed plate 2012, and then the manual valve 205 is rotated to open the cylinder 204, so that the left clamping arm 2021 and the right clamping arm 2022 are contracted and clamped inward (the upper and lower parts are clamped, and there are gaps on the left and right sides to avoid deformation and damage due to clamping); then the front end of the mounting plate 2051 is manually supported, and with the cooperation of the lifting equipment used in conjunction with the lifting hook, the sling and the sand core are steadily immersed in the coating, and the counterweight of the counterweight plate 206 is provided to automatically immerse the sand core to complete the dipping work.

[0034] It is worth noting that the cylinder is controlled by a manual valve. Since the manual valve and the cylinder are commonly used equipment and belong to existing mature technologies, their specific connection relationship and specific pipeline structure will not be described here.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A special hanger for casting sand cores, characterized by: It comprises a sling body (100) and a clamping and limiting mechanism (200); The sling body (100) comprises a crossbeam (101), a lifting lug (102), and a lifting ring (103); the lifting lug (102) is fixed to the top end of the crossbeam (101), and the top end of the lifting lug (102) is connected to the lifting ring (103); The clamping and limiting mechanism (200) comprises a fixed plate (201), a clamping arm (202), a bottom plate (203), a cylinder (204), a manual valve (205) and a counterweight pressure plate (206); the clamping arm (202) is arranged on both sides of the crossbeam (101); the upper part of the clamping arm (202) is connected to a crossbeam connecting shaft (1011), and is movably connected to the crossbeam (101) through the crossbeam connecting shaft (1011); the bottom end of the clamping arm (202) is fixed on the bottom plate (203); the inner side of the bottom plate (203) is connected to the fixed plate (201); ; The cylinder (204) is arranged between the two groups of clamping arms (202), and the cylinder (204) is connected to the manual valve (205); both ends of the cylinder (204) are connected to connecting rods (2041), and the two groups of connecting rods (2041) are connected to the clamping arm connecting shafts (2042), and are movably connected to the top of the clamping arm (202) through the clamping arm connecting shafts (2042); the counterweight pressure plate (206) is arranged at the bottom of the beam (101), and the bottom of the counterweight pressure plate (206) is connected to an anti-slip rubber strip (2061).

2. The special hanger for casting sand cores according to claim 1, characterized in that: The middle part of the cross beam (101) is connected to the lifting ear (102), the upper part of the lifting ear (102) is connected to the limit stop column (1021), and the lifting ring (103) is sleeved on the lifting ear (102) above the limit stop column (1021).

3. The special hanger for casting sand cores according to claim 1, characterized in that: The clamping and limiting mechanism (200) further comprises a rubber strip (207), and the surfaces of the fixing plate (201), the bottom plate (203), the clamping arm (202) and the fixing plate (201) are all connected to the rubber strip (207).

4. The special hanger for casting sand cores according to claim 1, characterized in that: The manual valve (205) is fixed on a mounting plate (2051), the cross section of the mounting plate (2051) is an isosceles trapezoidal structure, and two sides of the mounting plate (2051) are fixed on two sides of the crossbeam (101).

5. The special hanger for casting sand cores according to claim 1, characterized in that: The counterweight pressing plate (206) is provided with a weight-reducing through hole (2062), and anti-skid rubber strips (2061) are arranged on both sides of the weight-reducing through hole (2062). Multiple groups of anti-skid rubber strips (2061) are arranged at equal intervals on the lower surface of the counterweight pressing plate (206).

6. The special hanger for casting sand cores according to claim 1, characterized in that: The counterweight pressing plate (206) and the crossbeam (101) are arranged in an "X"-shaped structure, and the angle between the counterweight pressing plate (206) and the crossbeam (101) is less than 90 degrees.

7. The special hanger for casting sand cores according to claim 1, characterized in that: The clamping and limiting mechanism (200) further comprises a connecting plate (208), both sides of the bottom end of the clamping arm (202) are connected to the connecting plate (208), the cross section of the connecting plate (208) is in an "L"-shaped structure, the bottom horizontal portion of the connecting plate (208) is connected to the bottom plate (203), and the clamping arm (202) and the bottom plate (203) are connected to form an inverted "T"-shaped structure.

8. The special hanger for casting sand cores according to claim 1, characterized in that: The clamp arm (202) comprises a left clamp arm (2021) and a right clamp arm (2022); the bottom plate (203) comprises a left bottom plate (2031) and a right bottom plate (2032); the fixed plate (201) comprises a left fixed plate (2011) and a right fixed plate (2012); the left clamp arm (2021) and the right clamp arm (2022) are respectively arranged on the left and right sides of the cross beam (101); the left bottom plate (2031) and the right bottom plate (2032) are respectively arranged at the bottom ends of the left clamp arm (2021) and the right clamp arm (2022); and the left fixed plate (2011) and the right fixed plate (2012) are respectively arranged vertically on the inner sides of the left bottom plate (2031) and the right bottom plate (2032).

Images