A hardness testing device suitable for shell castings

Abstract

The present invention discloses a hardness testing device suitable for shell castings, comprising a Brinell hardness tester body and an auxiliary test bench, wherein a main test bench is fixedly mounted on the upper end of a screw height adjustment mechanism in the Brinell hardness tester body, the auxiliary test bench is arranged on the upper side frame wall of the main test bench, and an integrated adjustment plate frame portion is arranged on the front, back, left and right sides of the auxiliary test bench, a clamping claw capable of position adjustment is slidingly arranged on the adjustment plate frame portion, and a fixing bolt for locking is arranged at the sliding connection between the two, and the four clamping claws in the auxiliary test bench clamp and fix the shell casting, forming a limit to prevent the shell casting from displacement. The hardness testing device suitable for shell castings realizes fixed limit after the shell casting is placed, meeting the purpose of preventing displacement in shell casting testing, and further meets the purpose of multi-point testing of shell castings by utilizing the mutual cooperation between sliding position adjustment and rotational position adjustment.

Description

Technical Field

[0001] The present invention relates to the technical field related to shell casting detection, and in particular to a hardness detection device suitable for shell castings. Background Art

[0002] The casting process has the advantages of strong applicability and a wide range of applications. It can produce shell castings of various complex shapes and sizes. The production of shell castings is to use raw sand with certain properties as the main molding material to make a casting mold, pour the smelted liquid metal into the casting mold, and form it after cooling;

[0003] In order to ensure the overall performance and product safety of the shell casting and to promptly discover potential quality problems of the shell casting, it is necessary to perform hardness testing on the shell casting during the production process to ensure that the shell casting meets the design requirements and usage standards.

[0004] After searching the invention patent with authorization announcement number CN118190675B, a shell casting strength detection device is disclosed, which includes a bracket and a clamping part. When the strength of the shell casting needs to be tested, the shell casting is placed on the testing table, a hardness tester of corresponding specifications is selected for testing, the hardness tester is inserted into the mounting hole of the clamping block, and the hardness tester is clamped by the first clamping part and the second clamping part.

[0005] Based on the above patents and in combination with existing solutions and actual use processes, the current shell casting hardness testing device still has some problems, such as:

[0006] Existing shell casting hardness testing devices usually use a Brinell hardness tester. The Brinell hardness tester uses a spherical indenter to produce a large indentation and is suitable for coarse-grained or medium-hardness castings. In the existing Brinell hardness test, the shell casting is directly placed flat on a workbench, which is the same as the above-mentioned search patent. The above-mentioned patent has a testing table set on the bracket, and the shell casting is directly placed on the testing table. The shell casting placement method involved in the above-mentioned patent and the existing shell casting placement method cannot achieve fixed positioning of the shell casting after placement. The specifications and shapes of shell castings are diverse. The shell casting is prone to displacement during testing, resulting in abnormal indentation shape, affecting the testing effect;

[0007] Therefore, we propose a hardness detection device suitable for shell castings to solve the above problems. Summary of the Invention

[0008] The purpose of the present invention is to provide a hardness testing device suitable for shell castings, so as to solve the problem proposed in the above background technology that the fixed limit of the shell casting after placement cannot be achieved, and the shell casting is prone to displacement during detection, resulting in abnormal indentation shape, which affects the detection effect.

[0009] To achieve the above-mentioned object, the present invention provides the following technical solution: a hardness detection device suitable for shell castings, comprising:

[0010] A Brinell hardness tester body, wherein a main test stand is fixedly mounted on the upper end of the screw height adjustment mechanism in the Brinell hardness tester body;

[0011] Also includes:

[0012] Auxiliary test bench, the auxiliary test bench is arranged on the upper side frame wall of the main test bench, and the front, back, left and right sides of the auxiliary test bench are provided with an integrated adjustment plate frame part, the adjustment plate frame part is slidably provided with a clamping claw part that can adjust the position, and the sliding connection between the two is provided with a fixing bolt for locking, the four clamping claw parts in the auxiliary test bench clamp and fix the shell casting to form a limit to prevent the shell casting from displacement.

[0013] Preferably, the end of the transverse claw body in the clamping jaw is telescopically and slidably connected to a needle rod, and a first spring is installed at the sliding connection between the two, and the needle rods are arranged in a lattice state on the clamping jaw.

[0014] Preferably, a bearing seat is slidably connected in the groove cavity of the main test bench by rotating a screw rod member connected to the lower end of the groove cavity in the main test bench, and the lower side protrusion of the bearing seat is penetrated by the screw rod member, and the two are threaded together. The bearing seat rotates together with the auxiliary test bench frame on the shaft tube part to form a synchronous sliding structure.

[0015] Preferably, the upper side frame cavity wall of the bearing seat is rotatably connected to a first bevel gear, the first bevel gear is meshedly connected to a second bevel gear rotatably connected to the middle frame cavity of the bearing seat, and the first bevel gear drives the auxiliary test bench frame fixedly connected to the upper end of the shaft column portion thereof to form a synchronous rotation structure;

[0016] Among them, the central shaft column of the second bevel gear is provided with a spline groove concentric with it, and the spline groove is movably connected to the spline rod rotatably connected to the upper end of the groove cavity in the main test bench, and the second bevel gear forms a sliding structure on the spline rod through the spline groove.

[0017] Preferably, the extension section of the spline rod and the extension section of the screw member are provided with a driving mechanism for driving the two to rotate separately, the driving mechanism comprising a driving cylinder slidably connected to the right part of the frame cavity of the main test bench and a turning handle fixedly connected to the narrow part of the driving cylinder, the right end of the wide part of the driving cylinder is fixedly connected to a driving gear, and the lower side of the driving gear is connected to the first driven gear fixedly connected to the extension section of the screw member in a meshing manner;

[0018] A gear groove is provided in the tube groove in the wide portion of the driving cylinder, and the gear groove is connected to the second driven gear fixedly connected to the extension section of the spline rod in a snap-fit ​​manner.

[0019] Preferably, a locking pin for limiting is provided at the connection between the driving cylinder and the shell frame of the main test bench, and the locking pin forms a telescopic sliding structure on the frame cavity wall of the shell frame of the main test bench. A second spring is installed at the sliding connection between the two, and the nail head end of the locking pin is provided with a hemispherical structure.

[0020] Among them, the middle section of the wide part of the driving cylinder is provided with a first annular groove and a second annular groove from left to right, and the first annular groove and the second annular groove are both connected to the hemispherical end of the locking pin in a snap-fit ​​manner.

[0021] Preferably, the left end of the wide portion of the driving cylinder is rotatably connected to the longitudinal frame of the linkage frame, and the linkage frame is driven by the driving cylinder to form a sliding structure in the middle section of the frame cavity of the shell frame of the main test bench;

[0022] Among them, the main brake is slidably connected to the left part of the frame cavity of the shell frame in the main test bench, and the main brake is slidably connected to one end of the push-pull plate in the shell frame in the main test bench with the assistance of a pin and a flip connection, and the other end of the push-pull plate is slidably connected to the horizontal frame in the linkage frame with the assistance of a pin.

[0023] Preferably, a brake groove is provided on the disc portion of the main brake component, and the brake groove is connected to the slave brake disc fixedly connected to the extension section of the spline rod in a snap-fit ​​manner.

[0024] Compared with the prior art, the present invention has the following beneficial effects: the hardness testing device for shell castings can achieve fixed position limitation after the shell casting is placed, thereby meeting the purpose of preventing displacement during shell casting testing; and furthermore, the mutual coordination between sliding position adjustment and rotational position adjustment can meet the purpose of multi-point testing of shell castings;

[0025] 1. Adjustment plate racks are provided on the front, back, left, and right sides of the auxiliary test bench. Clamping claws are slidably provided on the four adjustment plate racks. The four clamping claws are arranged in a "cross" shape with the auxiliary test bench as the center. The position of the clamping claws is slidably adjusted on the adjustment plate rack. The shell casting is clamped and fixed by the four clamping claws. This is different from the existing hardness testing device in which the shell casting is placed directly on the workbench. The fixed position of the shell casting after placement is achieved, meeting the purpose of preventing displacement during shell casting testing and ensuring the accuracy of the test value.

[0026] Furthermore, the needle bars are arranged in a lattice state on the clamping jaw, and the ends of the transverse claw bodies of the needle bars in the clamping jaw form a telescopic sliding structure. After the clamping jaw is docked with the shell casting, the needle bars can be freely slid and adjusted on the clamping jaw with the aid of elastic support of the first spring to meet the different structural shapes and different specifications of the shell casting, thereby ensuring effective docking contact between the clamping jaw and the shell casting, ensuring sufficient contact area, and thus ensuring the reliability of clamping and fixing, thereby effectively improving the scope of application.

[0027] 2. After the screw rod is driven to rotate independently by the driving mechanism, the bearing seat drives the auxiliary test bench to adjust its sliding position through the threaded connection between the screw rod and the bearing seat. After the spline rod is driven to rotate independently by the driving mechanism, the first bevel gear drives the auxiliary test bench to adjust its rotational position through the engagement between the spline rod and the spline groove, and the meshing between the second bevel gear and the first bevel gear. The mutual coordination between the sliding position adjustment and the rotational position adjustment can cope with shell castings of different structural shapes and different testing requirements, and meet the purpose of multi-point testing of shell castings.

[0028] Furthermore, when the driving cylinder is pulled, the meshing action between the driving gear and the first driven gear independently drives the screw rod to rotate. When the driving cylinder is pushed, the engagement action between the gear groove and the second driven gear independently drives the spline rod to rotate, thereby optimizing the overall structure and meeting the use requirements of convenient adjustment operation.

[0029] Furthermore, when the driving mechanism drives the screw rod alone, the driving cylinder drives the linkage frame to slide synchronously. When the linkage frame slides, the main brake member is driven to slide with the assistance of the push-pull plate, and the spline rod is locked by utilizing the engagement between the brake groove and the slave brake disc, that is, the locking after the rotational position adjustment is performed. When the driving mechanism drives the spline rod alone, the self-locking characteristics between the screw rod and the bearing seat are utilized to lock the screw rod, that is, the locking after the sliding position adjustment is performed. Through the setting of the linkage structure, automatic locking after position adjustment is achieved, thereby ensuring precise positioning after adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a structural diagram of embodiment 1 of the present invention;

[0031] Figure 2 This is a schematic diagram of the front view of the three-dimensional structure of the connection between the main test bench and the auxiliary test bench of the present invention;

[0032] Figure 3 This is a schematic diagram of a side sectional three-dimensional structure of the connection between the adjusting plate frame portion and the clamping claw member of the present invention;

[0033] Figure 4 This is a schematic side view of the three-dimensional structure of the clamping jaw member of the present invention;

[0034] Figure 5 This is a schematic diagram of the front cross-sectional three-dimensional structure of the connection between the clamping jaw member and the needle rod of the present invention;

[0035] Figure 6 This is a structural diagram of embodiment 2 of the present invention;

[0036] Figure 7 This is a schematic diagram of a front cross-sectional three-dimensional structure of the connection between the bearing seat and the second bevel gear of the present invention;

[0037] Figure 8 This is a schematic diagram of a front cross-sectional three-dimensional structure of the connection between the bearing seat and the first bevel gear of the present invention;

[0038] Figure 9 This is a schematic diagram of the split side cross-sectional three-dimensional structure of the second bevel gear and the spline rod of the present invention;

[0039] Figure 10 This is a schematic diagram of the front cross-sectional three-dimensional structure of the connection between the main test bench and the drive mechanism of the present invention;

[0040] Figure 11 This is a schematic diagram of the top-down cross-sectional three-dimensional structure of the connection between the driving cylinder and the turning handle of the present invention;

[0041] Figure 12 This is a schematic diagram of a front cross-sectional perspective structure of the connection between the gear groove and the second driven gear of the present invention;

[0042] Figure 13 This is a schematic diagram of a top-view cross-sectional three-dimensional structure of the connection between the linkage frame and the push-pull plate of the present invention;

[0043] Figure 14 This is a schematic side view of the stereoscopic structure of the connection between the driving cylinder and the linkage frame of the present invention;

[0044] Figure 15 It is a schematic side view of the three-dimensional structure of the brake flower groove of the present invention and the brake disc.

[0045] In the figure: 1. Brinell hardness tester body; 2. main test bench; 3. auxiliary test bench; 301. adjustment plate frame; 4. clamping jaw; 5. fixing bolt; 6. needle rod; 7. first spring; 8. bearing seat; 9. screw rod; 10. first bevel gear; 11. second bevel gear; 1101. spline groove; 12. spline rod; 13. driving mechanism; 14. driving cylinder; 1401. first annular groove; 1402. second annular groove; 15. turning handle; 16. driving gear; 17. first driven gear; 18. gear groove; 19. second driven gear; 20. locking pin; 21. second spring; 22. linkage frame; 23. main brake member; 2301. brake spline groove; 24. push-pull plate; 25. slave brake disc. DETAILED DESCRIPTION

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example 1

[0047] The present invention provides a technical solution: a hardness detection device suitable for shell castings, which can address the problem that during detection of shell castings, fixed limit cannot be achieved, displacement is prone to occur, resulting in abnormal indentation shape, and affecting the detection effect. The operating jaw member 4 is operated to slide and adjust the position on the adjustment plate frame portion 301, and the shell casting is clamped and fixed by four jaw members 4.

[0048] This technical solution: please refer to Figure 1-Figure 5 A hardness testing device suitable for shell castings includes a Brinell hardness tester body 1. A screw height adjustment mechanism is provided in a vertically upward position in the lower body of the Brinell hardness tester body 1 (the screw height adjustment mechanism is a prior art component in existing Brinell hardness testers and is used to adjust the position of the worktable in the Brinell hardness tester. It is not described in detail in the drawings of the specification). A detection mechanism is provided in the upper body of the Brinell hardness tester body 1. The detection mechanism is located directly above the screw height adjustment mechanism (the detection mechanism is a prior art component in existing Brinell hardness testers and is mainly composed of two components: a microscope lens and a spherical indenter. The lens and the indenter are switchable. It is not described in detail in the drawings of the specification). A main test bench 2 is fixedly mounted on the upper end of the screw height adjustment mechanism in the Brinell hardness tester body 1.

[0049] It also includes a sub-test bench 3, which is arranged in parallel on the upper side wall of the main test bench 2. The front, back, left and right sides of the sub-test bench 3 are all provided with an integrated adjustment plate frame part 301. A clamping claw part 4 that can adjust the position is slidably provided on the adjustment plate frame part 301, and a fixing bolt 5 for locking is provided at the sliding connection between the two. The four clamping claw parts 4 in the sub-test bench 3 clamp and fix the shell casting to form a limit to prevent the shell casting from displacement.

[0050] Specifically, in this technical solution, the shell casting is clamped and fixed by four clamping claws 4. Figure 2 、 Figure 3 and Figure 4As shown, the longitudinal section of the adjusting plate frame portion 301 is in a "concave" shape, which is an integrated structure arranged on the auxiliary test bench 3 in a horizontal state. Since the clamping jaw member 4 is in an "L"-shaped structure, it is divided into two parts, a transverse claw body and a longitudinal claw body, wherein the longitudinal claw body is provided with a through-state "concave" groove, and the specifications and dimensions of the "concave" groove are adapted to the adjusting plate frame portion 301. After the clamping jaw member 4 is placed, it is assisted by the "concave" groove to be movably connected with the adjusting plate frame portion 301, so that the clamping jaw member 4 is positioned on the adjusting plate frame portion 301 in an active state. Even if the clamping jaw member 4 is restricted to horizontal sliding on the adjusting plate frame portion 301, the position of the clamping jaw member 4 is slidably adjusted on the adjusting plate frame portion 301;

[0051] When the cam 301 is in the closed position, the cam 302 is in the closed position, and the cam 303 is in the closed position, so that the cam 303 is in the closed position, and the cam 304 is in the closed position, so that the cam 303 is in the closed position, and the cam 304 is in the closed position, so that the cam 303 is in the closed position, and the cam 303 is in the closed position, so that the cam 303 is in the closed position, and the cam 303 is in the closed position, so that the cam 303 is in the closed position, and the cam 303 is in the closed position, so that the cam 303 is in the closed position,

[0052] Since the auxiliary test bench 3 is provided with adjustment plate frame parts 301 on the front, back, left and right sides, the four adjustment plate frame parts 301 are combined to form a "cross" structure, that is, the four clamping jaws 4 are arranged in a "cross" shape with the auxiliary test bench 3 as the center. According to the specifications and structural shape of the shell casting, the positions of the four clamping jaws 4 are individually slid and adjusted. The shell casting is clamped and fixed by the four clamping jaws 4, completing the fixed limit of the shell casting after it is placed on the auxiliary test bench 3.

[0053] At the same time, in this technical solution, according to Figure 2 、 Figure 4 and Figure 5 As shown, the end of the needle rod 6 facing the clamping jaw member 4 is the inward end, and the end thereof facing away from the clamping jaw member 4 is the outward end. Since the inward end of the needle rod 6 is provided with a thin rod portion of an integrated structure, wherein the thin rod portion and the needle rod 6 are on the same central axis, and the middle section of the thin rod portion is sleeved with a limit ring fixedly connected by bolts, after the needle rod 6 is placed, its inward end together with the thin rod portion is movably inserted into the groove cavity of the horizontal claw body in the clamping jaw member 4, and the thin rod portion together with the limit ring is movably clamped in the groove cavity of the horizontal claw body in the clamping jaw member 4, so that the needle rod 6 is positioned on the clamping jaw member 4 in a movable state, even if the needle rod 6 is restricted, it is prevented from slipping on the clamping jaw member 4;

[0054] Since the needle rod 6 is arranged in a lattice state on the clamping jaw 4, its outward end is hemispherical, and since the needle rod 6 constitutes a telescopic sliding structure at the end of the horizontal claw body in the clamping jaw 4, a first spring 7 is installed at the sliding connection between the needle rod 6 and the clamping jaw 4. After the first spring 7 is installed, it is movably sleeved on the thin rod part of the needle rod 6, one end of which is pressed against the limiting ring in the needle rod 6, and the other end is pressed against the groove wall of the horizontal claw body in the clamping jaw 4. When the clamping jaw 4 is docked with the shell casting for clamping operation, the needle rod 6 adapts to the different structural shapes and different specifications of the shell casting, and slides freely in the horizontal claw body of the clamping jaw 4. The elastic support of the first spring 7 ensures that the clamping jaw 4 and the shell casting have an effective contact area, which ensures that the clamping jaw 4 reliably and effectively clamps and fixes the shell casting.

[0055] Specifically, in this technical solution, when performing hardness testing on the shell casting, according to Figure 1 and Figure 2 As shown, according to the above, since the lower side frame wall of the main test bench 2 is fixedly connected to the upper end of the screw height adjustment mechanism in the Brinell hardness tester body 1 by bolts and is in a horizontal state, the auxiliary test bench 3 is placed and overlapped with the upper side frame wall of the main test bench 2. The shell casting is placed on the auxiliary test bench 3 and fixed by four clamping claws 4. The position of the main test bench 2 is adjusted by the screw height adjustment mechanism in the Brinell hardness tester body 1, so that the main test bench 2 and the auxiliary test bench 3 drive the shell casting to be adjusted to an appropriate height. The lens component of the detection mechanism in the Brinell hardness tester body 1 is selected. After waiting for the shell casting surface to be focused, the test surface is selected according to the lens. Then, the indenter component of the detection mechanism in the Brinell hardness tester body 1 is switched to the indenter component, and the indenter is pressed into the test surface of the shell casting. After holding for a specified time, the indenter is lifted and the lens component of the detection mechanism in the Brinell hardness tester body 1 is switched again. The indentation on the test surface of the shell casting is observed, and the data of the indentation portion is selected to calculate the Brinell hardness value. Example 2

[0056] The present invention is based on the first embodiment. Figure 6-Figure 15The technical solution shown can cope with shell castings of different specifications and shapes. The workbench in the existing hardness testing device cannot conveniently operate the free adjustment of the position of the shell casting, that is, it cannot meet the purpose of multi-point detection of shell castings, affecting the applicability. The driving mechanism 13 is used to drive the screw rod 9 to rotate alone. After the screw rod 9 rotates, it drives the bearing seat 8 to slide, and the bearing seat 8 drives the auxiliary test bench 3 to adjust the sliding position on the main test bench 2 synchronously. The driving mechanism 13 is used to drive the spline rod 12 to rotate alone. After the spline rod 12 rotates, the second bevel gear 11 is used to drive the first bevel gear 10 to rotate, so that the first bevel gear 10 drives the auxiliary test bench 3 to adjust the rotation position on the bearing seat 8 synchronously. By coordinating the sliding position adjustment and the rotation position adjustment of the auxiliary test bench 3, the docking position of the shell casting and the detection mechanism in the Brinell hardness tester body 1 can be freely adjusted to meet the use requirements of multi-point detection of shell castings.

[0057] Specifically, in this technical solution, the driving mechanism 13 drives the screw member 9 to rotate independently, and performs a sliding position adjustment operation on the auxiliary test bench 3. Figure 6 、 Figure 7 、 Figure 8 、 Figure 10 and Figure 12 As shown, the right end of the main test bench 2 is fixedly connected with a frame for the driving mechanism 13 by bolts, and the driving mechanism 13 is placed in the frame of the main test bench 2. Since the longitudinal section of the driving cylinder 14 is a "convex"-shaped structure, it is divided into two parts, a wide part and a narrow part. After the driving cylinder 14 is placed, the wide part is movably clamped in the right frame cavity of the middle frame of the main test bench 2, and the narrow part movably penetrates the right frame cavity wall of the middle frame of the main test bench 2 and extends outward. Since the turning handle 15 is placed outside the frame of the main test bench 2, it is sleeved and fixedly connected to the end of the narrow part of the driving cylinder 14 by bolts. Manually pulling the turning handle 15 causes the turning handle 15 to drive the driving cylinder 14 to move synchronously, and causes the driving cylinder 14 to slide to the right in the right part of the frame cavity of the middle frame of the main test bench 2.

[0058] Since the driving gear 16 is sleeved and fixedly connected to the right end of the wide part of the driving cylinder 14 by bolts after placement, and since the right end of the screw rod 9 is in a rightward extending state, after its placement, the extended section thereof is movably inserted into the lower part of the frame cavity of the main test bench 2, and since the right end of the first driven gear 17 is fixedly clamped with a bearing, the first driven gear 17 is sleeved and fixedly connected to the extended section of the screw rod 9 by bolts after placement, and its associated bearing is inserted into the frame cavity wall of the frame in the main test bench 2. After the driving cylinder 14 is driven to slide to the right, the lower side of the driving gear 16 is connected to the first driven gear 17. A driven gear 17 is meshed and connected together. When the driving gear 16 is meshed with the first driven gear 17, the second driven gear 19 is separated from the gear slot 18. The handle 15 is manually rotated to drive the driving cylinder 14 to move synchronously, and the driving cylinder 14 is rotated in the right part of the frame cavity of the main test bench 2. After the driving cylinder 14 drives the driving gear 16 to rotate synchronously, the meshing action between the driving gear 16 and the first driven gear 17 causes the first driven gear 17 to rotate in the frame cavity of the main test bench 2.

[0059] Since a groove cavity for the bearing seat 8 to slide is provided in the main test bench 2, wherein the upper end of the groove cavity is set in an open state, the left and right ends of the screw rod member 9 are fixedly clamped with bearings, and the screw rod member 9 is placed in a horizontal state at the lower end of the groove cavity of the main test bench 2, and its left and right ends together with the bearings are respectively inserted into the left and right side walls of the groove cavity in the main test bench 2. Moreover, since the first driven gear 17 is sleeved and fixedly connected to the extension section of the screw rod member 9 after placement and is fixedly connected by bolts, the two constitute a synchronous rotation structure. When the first driven gear 17 is driven to rotate, the screw rod member 9 rotates at the lower end of the groove cavity in the main test bench 2.

[0060] Since the bearing seat 8 is arranged in a square frame-shaped structure, the middle parts of the upper and lower sides thereof are provided with protrusions of an integrated structure. After the bearing seat 8 is placed, the lower protrusions thereof are movably clamped in the groove cavity of the main test bench 2, and the upper protrusions thereof are movably clamped in the opening of the groove cavity of the main test bench 2, so that the bearing seat 8 is positioned in the main test bench 2 in a movable state. Even if the bearing seat 8 is restricted on the main test bench 2 and can only slide horizontally, and since the screw rod 9 is movably inserted through the lower protrusions of the bearing seat 8 after being placed, the two are threadedly connected together. After the screw rod 9 is driven to rotate, the screw rod 9 and the bearing seat 8 are threadedly connected, so that the bearing seat 8 slides in the groove cavity of the main test bench 2;

[0061] Since the central position of the second bevel gear 11 is provided with an integrated shaft column portion, and since the spline groove 1101 is provided on the shaft column portion of the second bevel gear 11, the notches on both the left and right ends thereof are open. After the spline rod 12 is installed, it movably passes through the spline groove 1101. When the bearing seat 8 slides, the second bevel gear 11 forms a sliding structure on the spline rod 12 through the spline groove 1101, and does not affect the sliding of the bearing seat 8.

[0062] Since an open pipe groove is provided in the middle of the auxiliary test bench 3, and the upper groove wall of the pipe groove is fixedly connected to a limit ring by bolts, and since the middle of the upper protrusion of the bearing seat 8 is fixedly connected with a shaft tube portion vertically upward, wherein the longitudinal section of the shaft tube portion is a "T"-shaped structure, and the upper end of the shaft tube portion is fixedly clamped with a bearing, after the bearing seat 8 is installed, the shaft tube portion movably passes through the groove opening in the main test bench 2 and is inserted into the pipe groove in the auxiliary test bench 3, and the upper end of the shaft tube portion together with the bearing is movably clamped in the limit ring of the pipe groove in the auxiliary test bench 3, so that the auxiliary test bench 3 is positioned on the bearing seat 8 in a movable state. Even if the auxiliary test bench 3 is restricted to prevent it from rotating off on the bearing seat 8, the bearing seat 8 is driven to slide and drive the auxiliary test bench 3 to form a synchronous sliding structure;

[0063] According to the above, by manually rotating the handle 15 forward and backward, the meshing action between the driving gear 16 and the first driven gear 17 drives the screw rod 9 to rotate forward and backward, and the threaded connection between the screw rod 9 and the bearing seat 8 drives the bearing seat 8 to slide forward and backward, so that the auxiliary test bench 3 drives the shell casting to complete the free adjustment of the sliding position.

[0064] At the same time, in this technical solution, according to Figure 6 and Figure 12 As shown, when the driving mechanism 13 drives the spline rod 12 to rotate independently, the second driven gear 19 is engaged with the gear groove 18, and the driving gear 16 and the first driven gear 17 are in a separated state. By utilizing the self-locking characteristics of the screw rod 9, the bearing seat 8 drives the auxiliary test bench 3 to complete the self-locking after the sliding position adjustment, and completes the precise positioning after adjustment.

[0065] Specifically, in this technical solution, the driving mechanism 13 drives the spline rod 12 to rotate independently, and performs a rotation position adjustment operation on the auxiliary test bench 3. Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 12 and Figure 14As shown, a pipe groove in an open state is provided in the middle width portion of the driving cylinder 14. Since the gear groove 18 is provided in the pipe groove in the middle width portion of the driving cylinder 14, it is arranged in a concentric structure with the driving cylinder 14. Since the right end of the spline rod 12 is in a state of extending to the right, after the spline rod 12 is installed, the extension section thereof is movably inserted into the upper part of the shell frame cavity of the main test bench 2, and the extension section and the second driven gear 19 are movably inserted into the pipe groove in the middle width portion of the driving cylinder 14. After the second driven gear 19 is installed, it is sleeved and fixedly connected to the right end of the extension section in the middle width portion of the spline rod 12 by bolts. The turning handle 15 is manually pushed to cause the turning handle 15 to drive the driving cylinder 1 4 performs synchronous movement and causes the driving cylinder 14 to slide to the left in the right part of the housing frame cavity in the main test bench 2. After the driving cylinder 14 is driven to slide to the left, the gear slot 18 engages and connects with the second driven gear 19. When the gear slot 18 engages with the second driven gear 19, the driving gear 16 and the first driven gear 17 are in a separated state. The turning handle 15 is manually rotated to rotate the driving cylinder 14 in the right part of the housing frame cavity in the main test bench 2. After the driving cylinder 14 rotates synchronously with the gear slot 18, the engagement between the gear slot 18 and the second driven gear 19 drives the second driven gear 19 to rotate.

[0066] Since the left and right ends of the spline rod 12 are fixedly connected with bearings, the spline rod 12 is placed in a horizontal state at the upper end of the groove cavity of the main test bench 2, parallel to the screw member 9, and its left and right ends together with the bearings are respectively inserted into the left and right side walls of the groove cavity in the main test bench 2. In addition, since the second driven gear 19 is installed and sleeved and fixedly connected to the right end of the extension section of the spline rod 12 by bolts, the two constitute a synchronous rotation structure. When the second driven gear 19 is driven to rotate, the spline rod 12 rotates at the upper end of the groove cavity in the main test bench 2.

[0067] Since the main brake 23 is composed of a disc portion and a square column portion concentric with the disc portion, after the spline rod 12 is installed, the extension portion thereof movably passes through the square column portion in the main brake 23, and the main brake 23 does not affect the rotation of the spline rod 12;

[0068] Since the center position of the second bevel gear 11 is provided with an integrated shaft column portion, wherein the left and right ends of the shaft column portion are fixedly clamped with bearings, and the left and right ends of the shaft column portion are sleeved and fixedly connected with limiting rings by bolts, after the second bevel gear 11 is installed, the left and right ends of the shaft column portion are movably inserted through the left and right side frame cavity walls of the bearing seat 8 and extend outward, and the left and right ends of the shaft column portion are respectively plugged into the left and right side frame cavity walls of the bearing seat 8 together with the bearings, and the second bevel gear 11 is positioned in a movable state on the bearing seat through the two limiting rings of the shaft column portion in the second bevel gear 11. On the carrier 8, even if the second bevel gear 11 is restricted to prevent it from rotating on the carrier 8, since the number of tooth blocks of the second bevel gear 11 is the same as the number of tooth blocks of the second driven gear 19, the central axis portion of the second bevel gear 11 is provided with a spline groove 1101 concentric therewith, and the spline groove 1101 is movably connected to the spline rod 12. When the spline rod 12 is driven to rotate, the spline groove 1101 and the spline rod 12 form a synchronous rotation structure, and the second bevel gear 11 rotates in the frame cavity of the carrier 8;

[0069] Since the center position of the first bevel gear 10 is provided with an integrated shaft column portion, wherein a bearing is fixedly clamped on the shaft column portion, after the first bevel gear 10 is placed, the shaft column portion sequentially movably penetrates the upper frame cavity wall of the bearing seat 8 and the shaft tube portion cavity of the bearing seat 8 to extend outward, and the shaft column portion together with the bearing is inserted into the upper frame cavity wall of the bearing seat 8. Since the first bevel gear 10 and the second bevel gear 11 are connected in a meshing manner, after the second bevel gear 11 is driven to rotate, the meshing action between the second bevel gear 11 and the first bevel gear 10 causes the first bevel gear 10 to rotate on the upper frame cavity wall of the bearing seat 8;

[0070] After the first bevel gear 10 is placed, the upper end of its shaft column is clamped and fixedly connected to the upper groove wall of the pipe groove in the auxiliary test bench 3 by bolts. After the first bevel gear 10 is driven to rotate, it drives the auxiliary test bench 3 to form a synchronous rotation structure. According to the above, by manually rotating the handle 15 forward and backward, the spline rod 12 is driven to rotate forward and backward through the engagement between the gear groove 18 and the second driven gear 19. The engagement between the spline rod 12 and the spline groove 1101 and the meshing action between the second bevel gear 11 and the first bevel gear 10 are utilized to drive the first bevel gear 10 to rotate forward and backward, so that the auxiliary test bench 3 drives the shell casting to complete the free adjustment of the rotation position.

[0071] At the same time, in this technical solution, according to Figure 9 、 Figure 10 、 Figure 11 、 Figure 13 、 Figure 14 and Figure 15As shown, the left end of the middle wide portion of the driving cylinder 14 is sleeved and fixedly connected to the limit ring by bolts. Since the linkage frame 22 is a "U"-shaped structure, it is divided into a longitudinal frame body and two transverse frames located on the front and rear sides of the longitudinal frame body. After the linkage frame 22 is installed, the two transverse frames are movably clamped on the two side frame cavity walls of the shell frame of the main test bench 2, so that the linkage frame 22 is positioned on the main test bench 2 in an active state. Even if the linkage frame 22 is restricted on the main test bench 2, it can only slide horizontally. Moreover, since the middle part of the longitudinal frame body is movably sleeved on the left end of the middle wide portion of the driving cylinder 14 after the linkage frame 22 is installed, the linkage frame 22 is positioned on the driving cylinder 14 in an active state with the assistance of the limiting ring in the driving cylinder 14. The two constitute a synchronous motion structure, even if the linkage frame 22 is restricted, it is prevented from rotating off on the driving cylinder 14.

[0072] Since the left end of the wide portion of the driving cylinder 14 is rotatably connected to the longitudinal frame of the linkage frame 22, the linkage frame 22 will not affect the rotation of the driving cylinder 14;

[0073] When the driving mechanism 13 drives the screw member 9 to rotate independently, the driving gear 16 is engaged with the first driven gear 17, and the gear groove 18 is separated from the second driven gear 19. At this time, the driving cylinder 14 is pulled to slide rightward in the right part of the frame cavity of the main test bench 2. After the driving cylinder 14 slides rightward, it drives the linkage frame 22 to slide synchronously in the middle section of the frame of the main test bench 2.

[0074] Since the main brake member 23 is composed of a disc portion and a square column portion concentric with the disc portion, the main brake member 23 is movably mounted in the left frame cavity of the shell frame of the main test bench 2 after installation, wherein the square column portion is movably inserted into the frame cavity of the linkage frame 22 and is placed between the two transverse frames of the linkage frame 22, so that the main brake member 23 is positioned on the main test bench 2 in a movable state. That is, due to the structural shape of the square column portion in the main brake member 23, the main brake member 23 is restricted to horizontal sliding on the main test bench 2;

[0075] Since a through groove cavity is provided on the horizontal frame body of the linkage frame 22, and a pin column is inserted into the groove cavity and fixedly connected by bolts, a through groove cavity is provided on the square column part of the main brake member 23, and the front and rear ends of the groove cavity are inserted into and fixedly connected by bolts with pin columns, and since the push-pull plates 24 are symmetrically arranged front and back about the horizontal central axis of the linkage frame 22, the two push-pull plates 24 are combined to form an "eight"-shaped structure, and the middle part of the push-pull plates 24 is rotatably connected to the shaft column, and the push-pull plates 24 are placed in the gap between the square column part of the main brake member 23 and the horizontal frame body of the linkage frame 22, wherein the shaft column is inserted into and fixedly connected to the frame cavity wall of the shell frame of the main test bench 2 by bolts, and since both ends of the push-pull plates 24 are provided with a through groove cavity, the two ends of the push-pull plates 24 are symmetrically arranged front and back about the horizontal central axis of the linkage frame 22. After the push-pull plate 24 is placed, one end of the push-pull plate 24 is movably inserted in the groove of the square column part of the main brake 23, and the pin in the main brake 23 movably penetrates the slide groove at one end of the push-pull plate 24, and the other end of the push-pull plate 24 is movably inserted in the groove cavity of the horizontal frame body in the linkage frame 22. The pin in the linkage frame 22 movably penetrates the slide groove at the other end of the push-pull plate 24. After the linkage frame 22 slides to the right, the other end of the push-pull plate 24 is assisted by the pin to slide in the horizontal frame body in the linkage frame 22, and the push-pull plate 24 is turned over in the shell frame of the main test bench 2. After the push-pull plate 24 is turned over, one end of the push-pull plate 24 is assisted by the pin to slide on the main brake 23, and the main brake 23 slides to the left in the frame cavity of the shell frame of the main test bench 2;

[0076] Since the slave brake disc 25 is arranged in a bevel gear-like structure, its specifications and dimensions are the same as those of the second bevel gear 11, and after being placed, it is sleeved and fixedly connected to the middle part of the extension section of the spline rod 12 by bolts. Since the brake groove 2301 is arranged in a bevel gear-like structure, it is adapted to the slave brake disc 25, and the brake groove 2301 is concentrically opened on the disc part of the main brake component 23, after the main brake component 23 slides to the left, the slave brake disc 25 is engaged and connected with the brake groove 2301. Through the engagement between the slave brake disc 25 and the brake groove 2301, the first bevel gear 10 drives the auxiliary test bench 3 to complete the locking after the rotation position adjustment, and the precise positioning after adjustment is completed.

[0077] Specifically, in this technical solution, the driving cylinder 14 is locked after sliding. Figure 11 、 Figure 12 and Figure 13As shown, a locking pin 20 for limiting is provided at the connection between the driving cylinder 14 and the shell frame of the main test bench 2. Since the locking pin 20 is arranged in a nail-shaped structure, it is symmetrically arranged front to back about the horizontal center axis of the driving cylinder 14. After the locking pin 20 is installed, the tail end of the nail is movably clamped on the frame cavity wall of the shell frame of the main test bench 2, and the head end of the nail movably penetrates the frame cavity wall of the shell frame of the main test bench 2 and extends into the frame cavity. In addition, since the sliding connection between the locking pin 20 and the main test bench 2 is arranged A second spring 21 is installed. After the second spring 21 is installed, one end of the second spring 21 presses against the nail tail end of the locking pin 20, and the other end presses against the frame cavity wall of the shell frame in the main test bench 2. Since the middle section of the wide part of the driving cylinder 14 is provided with a first annular groove 1401 and a second annular groove 1402 from left to right, the centers of the first annular groove 1401 and the second annular groove 1402 are both on the same central axis as the center of the driving cylinder 14. The nail head end of the locking pin 20 is arranged in a hemispherical structure. The groove cavity of the first annular groove 1401 and the groove cavity of the second annular groove 1402 are both semi-arc-shaped, which are adapted to the hemispherical end of the locking pin 20. When the driving mechanism 13 drives the screw rod 9 to rotate alone and the driving cylinder 14 is pulled to slide to the right, the hemispherical end of the locking pin 20 loses the engagement connection with the second annular groove 1402, so that the locking pin 20 shrinks and slides on the frame cavity wall of the shell frame in the main test bench 2, and the second spring 21 is squeezed and elastically deformed. The second annular groove 14 The spacing between 02 and the first annular groove 1401 is equal to the maximum sliding distance of the driving cylinder 14. After the driving cylinder 14 is pulled to slide to the right, it is reset by the elastic deformation of the second spring 21, so that the locking pin 20 extends and slides on the frame cavity wall of the shell frame in the main test bench 2, and the hemispherical end of the locking pin 20 is engaged with the first annular groove 1401, so that the driving cylinder 14 that has slid to the right is positioned and locked, that is, the driving mechanism 13 is kept to drive only the screw member 9;

[0078] According to the above, when the driving mechanism 13 drives the spline rod 12 to rotate alone, conversely, after the driving cylinder 14 is pushed to slide to the left, the hemispherical end of the locking pin 20 loses the engagement connection with the first annular groove 1401 and re-engages with the second annular groove 1402, positioning and locking the driving cylinder 14 after sliding to the left, that is, keeping the driving mechanism 13 driving the spline rod 12 alone.

[0079] This is the entire working process of the hardness testing device for shell castings. Contents not described in detail in this specification belong to the existing technology well known to professional and technical personnel in this field.

[0080] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0081] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hardness testing device for shell castings, comprising: A Brinell hardness tester body (1), wherein a main test stand (2) is fixedly mounted on the upper end of a screw height adjustment mechanism in the Brinell hardness tester body (1); It is characterized by further comprising: A secondary test bench (3), the secondary test bench (3) is arranged on the upper side frame wall of the main test bench (2), and the front, back, left and right sides of the secondary test bench (3) are all provided with an integrated structure adjustment plate frame portion (301), a clamping claw (4) capable of position adjustment is slidably provided on the adjustment plate frame portion (301), and a fixing bolt (5) for locking is provided at the sliding connection between the two, and the four clamping claws (4) in the secondary test bench (3) clamp and fix the shell casting to form a limit to prevent the shell casting from displacement; The groove of the main test bench (2) is driven by a screw rod (9) connected to the lower end of the groove of the main test bench (2) to slide and connect with a bearing seat (8), and the lower side protrusion of the bearing seat (8) is penetrated by the screw rod (9), and the two are threadedly connected together. The bearing seat (8) is rotated together with the auxiliary test bench (3) on the shaft tube to form a synchronous sliding structure; The upper frame cavity wall of the bearing seat (8) is rotatably connected to a first bevel gear (10), the first bevel gear (10) is connected to a second bevel gear (11) rotatably connected to the frame cavity of the bearing seat (8) in a meshing manner, and the first bevel gear (10) drives the auxiliary test bench (3) fixedly connected to the upper end of the shaft column to form a synchronous rotation structure; The central axis of the second bevel gear (11) is provided with a spline groove (1101) concentric therewith, and the spline groove (1101) is movably connected to a spline rod (12) rotatably connected to the upper end of the groove cavity of the main test bench (2), and the second bevel gear (11) forms a sliding structure on the spline rod (12) through the spline groove (1101); The extension section of the spline rod (12) and the extension section of the screw rod (9) are provided with a driving mechanism (13) for driving the two to rotate separately; The driving mechanism (13) comprises a driving cylinder (14) slidably connected to the right part of the housing frame cavity of the main test bench (2) and a turning handle (15) fixedly connected to the narrow part of the driving cylinder (14); the right end of the wide part of the driving cylinder (14) is fixedly connected to a driving gear (16), and the lower side of the driving gear (16) is connected to a first driven gear (17) fixedly connected to the extension section of the screw rod (9) in a meshing manner; A gear groove (18) is provided in the tube groove of the middle wide portion of the driving cylinder (14), and the gear groove (18) is connected to a second driven gear (19) fixedly connected to the extension section of the spline rod (12) in a snap-fit ​​manner; When the driving cylinder (14) is driven to slide rightward, the lower side of the driving gear (16) is meshed and connected with the first driven gear (17); when the driving cylinder (14) is driven to slide leftward, the gear groove (18) is engaged and connected with the second driven gear (19); A locking pin (20) for limiting is provided at the connection between the driving cylinder (14) and the shell frame of the main test bench (2), and the locking pin (20) forms a telescopic sliding structure on the frame cavity wall of the shell frame of the main test bench (2), and a second spring (21) is installed at the sliding connection between the two, and the nail head end of the locking pin (20) is provided in a hemispherical structure; The middle section of the wide portion of the driving cylinder (14) is provided with a first annular groove (1401) and a second annular groove (1402) in sequence from left to right, and both the first annular groove (1401) and the second annular groove (1402) are connected to the hemispherical end of the locking pin (20) in a snap-fit ​​manner; The left end of the middle wide portion of the driving cylinder (14) is rotatably connected to the longitudinal frame body of the linkage frame (22), and the linkage frame (22) is driven by the driving cylinder (14) to form a sliding structure in the middle section of the frame cavity of the shell frame of the main test bench (2). The linkage frame (22) is in a "U"-shaped structure, divided into a longitudinal frame body and two transverse frames located at the front and rear sides of the longitudinal frame body. The main brake member (23) is slidably connected to the left portion of the frame cavity of the shell frame of the main test bench (2), and the main brake member (23) is slidably connected to one end of the push-pull plate (24) in the shell frame of the main test bench (2) with the assistance of a pin column, and the other end of the push-pull plate (24) is slidably connected to the horizontal frame body of the linkage frame (22) with the assistance of a pin column, and the main brake member (23) is composed of a disk portion and a square column portion concentric with the disk portion. The push-pull plates (24) are arranged symmetrically front to back about the horizontal center axis of the linkage frame (22), and are combined to form an "eight"-shaped structure.

2. A hardness testing device for shell castings according to claim 1, characterized in that: The end of the transverse claw body in the clamping claw member (4) is telescopically and slidably connected to a needle rod (6), and a first spring (7) is installed at the sliding connection between the two. The needle rods (6) are arranged and distributed in a lattice state on the clamping claw member (4).

3. The hardness testing device for shell castings according to claim 1, characterized in that: A brake groove (2301) is provided on the disc portion of the main brake member (23), and the brake groove (2301) is connected to a slave brake disc (25) fixedly connected to the extension section of the spline rod (12) in a snap-fit ​​manner.

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