Semi-automatic ball loading machine

Abstract

According to the semi-automatic ball loading machine provided by the invention, the ball protecting rod suitable for the ball screw pair structure in the semi-automatic ball loading machine is matched with the ball injecting structure, so that in the steel ball mounting process, the mounted steel balls are protected, the manual participation rate in the steel ball mounting process is reduced, and the steel ball mounting efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of ball screw assembly, in particular to a semi-automatic ball loading machine. Background Art

[0002] The screw nut unit is a highly efficient actuator that converts rotary motion into linear motion. Figure 1 As shown in the figure, it is a ball screw pair N used in the steering gear of an automobile. Figures 1 to 3 As shown, the ball screw pair N includes: a nut N1, a screw rod N2, an outer ring N3, a retaining frame N6 and a steering gear N7, and the steel ball N5 is installed in the ball track N4 of the inner cavity of the nut N1. The ball screw pair N in this application is provided with five mutually independent ball tracks N4, and five sets of steel balls need to be assembled. At the same time, a first stop block N11 is provided at the bottom of the nut, and a second stop block N21 is provided at the bottom of the screw rod. Figure 3 As shown, the first stop block N11 is set as a protruding structure extending in the inner cavity diameter direction of the screw nut, and the second stop block N21 is a protruding structure along the direction of the screw rod body and perpendicular to the first stop block N11. After the screw rod N1 rotates from top to bottom into the inner cavity of the screw nut based on the thread engagement, when it rotates to a preset position, the first stop block N11 and the second stop block N21 interfere with each other and block each other to prevent the screw rod from rotating excessively.

[0003] In order to improve the assembly efficiency, in the prior art, on the assembly production line of the ball screw pair, the steel balls in the ballway N4 are mostly installed based on automatic installation equipment. Because the several ballways inside the nut are usually located at different heights, the steel balls are usually installed in batches on different ballways N4 from bottom to top according to the height position. The screw N2 of the ball screw pair of the present application cannot be installed from the bottom of the nut N1, but can only be installed from the top, because the steel ball loading component also needs to enter from the top, and the two cannot exist at the same time. When installing the steel balls, a ball protection structure must be used. For the installed ballway, the steel balls need to be blocked from the inner cavity of the nut by the ball protection structure to prevent the installed steel balls from falling from the ballway.

[0004] The ball protection structure in the prior art is usually cylindrical, and its diameter is adapted to the diameter of the inner cavity of the nut, so as to protect the steel ball. However, in the present application, the bottom of the screw nut is provided with a first stop block N11 and a second stop block N21 extending into the inner cavity of the nut. As a result, the ball protection structure adapted to the inner cavity diameter of the nut in the existing ball loading equipment cannot pass through the bottom outlet of the inner cavity of the nut, and cannot realize the installation of steel balls on the ballways of different heights from bottom to top. As a result, the existing screw nut ball loading equipment cannot be used in the ball loading process of the ball screw pair in the present application, and the efficiency of manual ball loading is very low. Summary of the invention

[0005] In order to solve the problem of low ball loading efficiency of a screw rod and nut with a stop block, the present invention provides a semi-automatic ball loading machine, which can effectively improve the steel ball installation efficiency of the screw rod and nut with a stop block.

[0006] The technical solution of the present invention is as follows: a semi-automatic ball loading machine, which comprises: a ball filling structure and a ball protection structure; Features: The ball injection structure is arranged above the ball protection structure; when installing the steel ball, the steel ball channel in the inner cavity of the nut is installed from top to bottom, and the installed steel ball is protected based on the ball injection structure during the installation process. When the ball injection structure is withdrawn after the installation is completed, the installed steel ball is protected by the ball protection structure; The ball protection structure comprises: a ball protection rod and a ball protection rod mounting structure; The ball protection rod comprises: a ball protection part, a sliding part, a mounting part and a connecting block; The ball protection part is cylindrical, and its diameter is adapted to the diameter of the inner cavity of the nut to be installed, and its length is adapted to the distance between the highest ball track and the lowest ball track in the inner cavity of the nut to be installed; the radius of the sliding part is adapted to the difference between the radius of the inner cavity of the nut to be installed and the first stop block; the cross-sectional size of the connecting block is adapted to the shape and size of the first stop block at the bottom of the nut to be installed; The ball protection part, the sliding part and the mounting part are arranged concentrically from top to bottom; the bottom of the sliding part and the top of the mounting part are fixedly connected, the bottom end of the connecting block is connected to the mounting part, the top extends upward and is slidably inserted into the ball protection part from bottom to top; the side wall of the bottom end of the ball protection part is provided with an insertion groove from bottom to top that is adapted to the shape and size of the top end of the connecting block; The ball protection rod installation structure comprises: a ball protection rod installation sleeve and a support spring; The ball protection rod installation sleeve is opened upward, and the support spring is arranged at the bottom of the inner cavity of the ball protection rod sleeve; the ball protection rod is movably inserted into the ball protection rod installation sleeve from top to bottom; and the bottom end of the ball protection rod is pressed against the top end of the support spring.

[0007] It is further characterized by: It also includes: a screw rod connecting block; The screw rod connection block comprises: a ring-shaped block; a second stop block plug-in interface is arranged on the block, and the size of the second stop block plug-in interface is larger than the size of the first stop block; the top end surface and the bottom end surface of the block are respectively provided with: a ball protection part plug-in block and a screw rod plug-in block; the shape and size of the screw rod plug-in block are adapted to the positioning hole at the bottom of the screw rod to be installed; the top end of the ball protection part is provided with an insertion hole adapted to the ball protection part plug-in block; The ball injection structure comprises: a lifting drive structure, a ball injection connecting plate and a ball injection rod; The ball injection connecting plate is arranged on the lifting and driving structure; the ball injection rod is installed on the ball injection connecting plate; a steel ball injection channel is provided in the inner cavity of the ball injection rod, and a steel ball inlet at the top of the steel ball injection channel is connected to the steel ball buffer structure; a curved steel ball introduction channel from top to bottom is provided at the lower part of the steel ball injection channel; The lifting drive structure comprises: a ball injection motor, a ball injection slide rail, and a ball injection slider; The ball injection slide rail is vertically mounted on the ball injection support frame, the ball injection slider is slidably mounted on the ball injection slide rail, and the ball injection motor drives the ball injection slider to move up and down along the ball injection slide rail based on the ball injection screw. It also includes: a steel ball cache structure; the steel ball cache structure includes: a cache slider, a cache rod, a horizontal cylinder and a cache slide rail; The buffer slide rail is horizontally mounted on the upper end surface of the ball injection connection plate, and the buffer slider is slidably mounted on the buffer slide rail; Two vertical ball paths are respectively provided inside the cache slider in a direction parallel to the cache slide rail, which are respectively referred to as a cache ball path and a ball push path. The output end of the horizontal cylinder is horizontally connected to an end of the cache slider away from the ball push path. The height of the cache ball path is set to the height of a group of steel balls. The travel of the cache ball path and the ball push path both passes through the steel ball entrance of the ball injection structure. The cache rod is arranged above the cache slider through a cache rod mounting frame, and a vertical steel ball feeding channel is provided inside the cache rod. The top entrance of the steel ball feeding channel is connected to the steel ball storage structure, and the bottom exit is located on the horizontal sliding stroke of the cache ball channel; The steel ball buffer structure also includes: a ball push rod introduction structure, which is fixedly installed above the ball push lane entrance based on an introduction bracket; the ball push rod introduction structure includes a ball rod entrance in the shape of a truncated cone that is wide at the top and narrow at the bottom; the introduction bracket is installed on the ball injection connection plate; It also includes: a ball pushing structure; The ball pushing structure comprises: a ball pushing cylinder, a ball pushing rod, a ball pushing slide plate and a ball pushing slide rail; The ball pushing bracket is arranged on the ball injection connecting plate, the ball pushing slide rail is vertically arranged on the ball pushing bracket, and the ball pushing slide plate is slidably installed on the ball pushing slide rail; the ball pushing cylinder is arranged on the ball pushing bracket, and the cylinder output end is vertically downwardly connected to the ball pushing slide plate; the ball pushing rod is vertically downwardly arranged below the ball pushing slide plate; The golf club comprises: a straight rod portion and a spring rod connected together from top to bottom; It also includes: a nut clamping structure; The nut clamping structure comprises: a nut seat and a rotation driving structure; The nut seat is adapted to the shape and size of the nut to be installed, and after the nut to be installed and the outer ring are assembled, they are placed on the nut seat; the nut seat is arranged on a rotary drive structure, and the rotary drive structure drives the nut seat to rotate; It also includes: stabilizing the structure; The stable structure comprises: a nut outer ring pressing cover and a nut end face pressing ring plate; The outer ring pressing cover of the nut is installed on the nut seat based on thread engagement; the end face pressing ring plate of the nut is sleeved on the ball injection rod, a protruding ring-mounted step structure is arranged on the outer wall of the ball injection rod, and a buffer spring is sleeved on the outer wall of the ball injection rod, and the two ends are respectively connected to the bottom end face of the step structure and the end face pressing ring plate of the nut; the outer diameter of the end face pressing ring plate of the nut is larger than the inner cavity diameter of the nut seat to be installed; The stabilizing structure also includes: a ball protection rod lifting and limiting structure; The ball protection rod lifting and limiting structure includes: a limiting slide groove and a limiting bolt; a through groove is opened from top to bottom on the ball protection rod above the ball protection rod mounting sleeve, which is recorded as: the limiting slide groove; the length of the limiting bolt is greater than the inner cavity diameter of the ball protection rod mounting sleeve, and it penetrates the ball protection rod mounting sleeve and the limiting slide groove horizontally at the same time.

[0008] The present application provides a semi-automatic ball loading machine, which cooperates with a ball protection rod and a ball injection structure suitable for the ball screw substructure in the present application, and protects the installed steel balls during the steel ball installation process, reduces the manual participation rate of the steel ball installation process, and improves the efficiency of steel ball installation. In the present application, a ball protection part with a diameter adapted to the inner cavity of the nut and a sliding part with a smaller diameter are provided on the ball protection rod; during the steel ball installation process, the steel ball is protected by the ball protection part in the inner cavity of the nut; and the sliding part with a diameter adapted to the outlet at the bottom of the nut is connected to the mounting part below, ensuring that the ball protection part can smoothly slide up and down in the inner cavity of the nut; the ball protection part is movably plugged into the mounting part based on the connecting block, and when the steel ball is installed, the nut and the ball protection part are separated from the sliding part together, because the size cross section of the connecting block is adapted to the shape and size of the first stop block at the bottom of the nut to be installed, the connecting block insertion groove provided on the side wall of the ball protection part can ensure that the ball protection part can avoid the first stop block at the bottom of the nut and be smoothly taken out of the inner cavity of the nut. A screw connection block is also provided in the ball protection rod. The screw connection block is movably connected to the screw and the ball protection part through the ball protection part plug-in block and the screw plug-in block respectively. After the screw connection block is placed on the top of the ball protection rod, the screw can be plugged into the top of the ball protection rod. In the process of the screw being installed into the inner cavity of the nut based on the threaded connection, the protection of the steel ball already installed in the inner cavity of the nut is achieved through the cooperation of the screw and the ball protection part during the installation of the screw. Similarly, a second stop block plug-in interface with a size larger than the first stop block is provided on the screw connection block. After all steel balls are protected based on the screw, after the ball protection part is manually taken out, the screw connection block can also be smoothly taken out based on the second stop block plug-in interface. The present application realizes the semi-automatic installation of steel balls and screws through the customized ball protection rod, which effectively improves the installation efficiency of the ball screw pair. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the three-dimensional structure of the ball screw pair to be installed; Figure 2 It is a schematic diagram of the cross-section structure of the ball screw pair to be installed; Figure 3 It is a schematic diagram of the position structure of the first stop block and the second stop block; Figure 4 It is a schematic diagram of the overall structure; Figure 5 It is a three-dimensional structural schematic diagram of the ball injection structure, the ball pushing structure and the ball protection structure; Figure 6 It is a schematic diagram of the cross-sectional structure of the ball pushing structure; Figure 7 It is a schematic diagram of the cross-sectional structure of the ball injection structure; Figure 8 It is a schematic diagram of the three-dimensional structure of the steel ball buffer structure; Fig. 9 It is a schematic diagram of the structure of the steel ball buffer structure in cross section; Fig.10 It is a three-dimensional structural diagram of the club guard; Fig.11 It is a structural schematic diagram of the screw rod connecting block; Fig.12 It is a schematic diagram of the structure of the cross section of the club guard. DETAILED DESCRIPTION

[0010] like Figure 4 to Figure 12 As shown, the present invention includes a semi-automatic ball loading machine, which includes: a ball storage structure 2 installed on a main bracket 1, a ball pushing structure 3, a steel ball buffer structure 4, a ball injection structure 5, a nut clamping structure 6 and a ball protection structure 7.

[0011] In the present application, the ball injection structure 5 is arranged above the ball protection structure 7; when installing the steel ball, the steel ball channel in the inner cavity of the nut N1 to be installed is installed from top to bottom. During the installation process, the installed steel ball is protected based on the ball injection structure 5. After the installation is completed, when the ball injection structure 5 is withdrawn, the installed steel ball is protected by the ball protection structure 7. There are 5 ball channels in the inner cavity of the nut N1 to be installed in the present application, which are at different positions and angles, so one group of balls is installed each time, and 5 steel balls are installed on each nut. By setting a sensor on one side of the nut seat, the diverter N7 on the circumference of the nut is detected to determine the current ball channel for ball loading.

[0012] like Figure 10~Figure 12 As shown, the ball protection structure 7 includes a ball protection rod 71 and a ball protection rod mounting structure 72 .

[0013] The ball protection rod 71 includes: a ball protection part 711, a sliding part 712, a mounting part 713, a screw rod connecting block 714 and a connecting block 715; the ball protection part 711 is cylindrical, and its diameter is adapted to the diameter of the inner cavity of the nut N1 to be installed, and the length of the ball protection part 711 is adapted to the distance between the highest position ball lane and the lowest position ball lane of the inner cavity of the nut N1 to be installed, so as to ensure that the ball protection part 711 can protect the steel balls in all the ball lanes after the ball protection rod 51 exits the inner cavity of the nut. The radius of the sliding part 712 is adapted to the difference between the radius of the inner cavity of the nut N1 to be installed and the first stop block, so as to ensure that during the installation of the steel ball, the ball protection part 711 can slide up and down smoothly in the inner cavity of the nut; the cross-sectional size of the connecting block 715 is adapted to the shape and size of the first stop block at the bottom of the nut N1 to be installed.

[0014] The ball protection part 711, the sliding part 712 and the mounting part 713 are concentrically arranged from top to bottom; the bottom of the sliding part 712 and the top of the mounting part 713 are fixedly connected, the bottom end of the connecting block 715 is connected to the mounting part 713, and the top extends upward and is slidably inserted into the ball protection part 711 from bottom to top; an insertion groove from bottom to top that is adapted to the shape and size of the top end of the connecting block 715 is provided on the side wall at the bottom end of the ball protection part 711.

[0015] The ball protection part 711 is movably plugged into the top of the sliding part 712. By setting an insertion groove on the side wall of the ball protection part 711, the connection block 715 is inserted into the ball protection part 711 to prevent the ball protection part 711 from rotating during the ball installation process, thereby reducing the probability of falling off. The size of the ball protection part is set to be compatible with the shape and size of the first stop block, ensuring that after the connection block 713 is taken out, the ball protection part 711 can avoid the first stop block based on the gap of the insertion groove and be taken out from the bottom of the nut where the steel ball is installed.

[0016] The screw connecting block 714 includes: a ring-shaped block 7141; a second stop block plug-in interface 7142 is set on the block 7141, and the size of the second stop block plug-in interface 7142 is larger than the size of the first stop block; the top end surface and the bottom end surface of the block 7141 are respectively provided with: a ball protection part plug-in block 7143 and a screw plug-in block 7144; the shape and size of the screw plug-in block 7144 are adapted to the positioning hole at the bottom of the screw N2 to be installed; an insertion hole adapted to the ball protection part plug-in block 7143 is provided at the top of the ball protection part 711.

[0017] After the ball injection rod 51 is withdrawn from the inner cavity of the screw nut, the screw rod connecting block 714 is plugged into the top of the ball protection part, and then the screw rod N2 to be installed is plugged into the top of the screw rod connecting block 714. Fig.10 As shown. The present application sets a screw connecting block 714 to guide the installation of the screw N2 to be installed through the ball protection rod. After the ball injection rod is completely withdrawn, it is ensured that the steel ball will not fall off during the process of the screw N2 to be installed being installed into the inner cavity of the nut. The size of the second stop block plug-in interface 7142 is larger than the size of the first stop block to ensure that when the screw N2 completely covers all the ball lanes, the ball protection part 711 and the screw connecting block 714 are pushed to the bottom of the inner cavity of the nut by the screw N2. After the ball protection part 711 is taken out, the screw connecting block 714 can avoid the first stop block based on the second stop block plug-in interface 7142 and be taken out from the bottom of the nut where the steel ball is installed.

[0018] like Figure 6 and Figure 7As shown, the ball protection rod installation structure 72 includes: a ball protection rod installation sleeve 721 and a support spring 722; one end of the ball protection rod installation sleeve 721 is open, and the opening is arranged upward just below the nut seat 61, and the support spring 722 is arranged at the bottom of the inner cavity of the ball protection rod 71 sleeve; the lower part of the ball protection rod 71 is movably inserted into the ball protection rod installation sleeve 721 from top to bottom; the bottom end of the ball protection rod 71 is crimped onto the top of the support spring 722.

[0019] In the default state, the support spring 722 lifts the ball protection rod 71 to a position that just covers the highest and lowest ball lanes in the inner cavity of the nut N1. During the process of installing the steel ball on the ball injection rod 51, as the ball injection rod 51 descends, the support carbonization 722 is gradually compressed; and after the steel ball is installed, as the ball injection rod 51 slowly rises and exits the inner cavity of the nut, the ball protection rod 71 will also rise synchronously under the action of the support spring 722, so that the ball injection rod 51 and the ball protection part 71 move synchronously, thereby ensuring that the two protect the ball lanes at the same time and prevent the steel ball from falling, until the ball injection rod 51 completely exits the inner cavity of the nut, and the ball protection part 711 rises to the initial position, completely protecting all the ball lanes.

[0020] The ball injection structure 5 comprises: a lifting drive structure, a ball injection rod 51 and a ball injection connecting plate 52; the ball injection connecting plate 52 is arranged on the lifting drive structure; the ball injection rod 51 is installed on the ball injection connecting plate 52; a steel ball injection channel 511 is provided in the inner cavity of the ball injection rod 51, the ball injection rod 51 passes through the ball injection connecting plate 52, and the steel ball inlet at the top of the steel ball injection channel 511 is connected to the ball pushing channel 412 or the buffering channel 411 in the steel ball buffer structure 4; the lower part of the steel ball injection channel 511 is provided with an arc-shaped steel ball introduction channel from top to bottom, as shown in detail. Figure 7 As shown; because the ball track in the inner cavity of the nut N1 is curved, the present application sets the bottom of the steel ball injection channel 511 as a top-down curved introduction structure, the curvature of which is adapted to the curvature of the ball track in the nut, ensuring that the steel ball can be guided into the ball track in the inner cavity of the nut.

[0021] The bottom end of the ball injection rod 51 is provided with a plug-in fastener adapted to the insertion hole at the top of the ball protection part 711. When the ball injection rod 51 enters the inner cavity of the nut, the ball protection rod is pushed downward first until the ball outlet of the steel ball injection channel 511 reaches the highest ball track installation position. In the process of pressing the ball protection rod downward, the bottom of the ball injection rod 51 has been inserted into the top of the ball protection part 711, and the plug-in structure ensures that the two can move synchronously.

[0022] The lifting drive structure includes: a ball injection motor 53, a ball injection slide rail 54, and a ball injection slider 55; the ball injection slide rail 54 is vertically mounted on the ball injection support frame 56, the ball injection slider 55 is slidably mounted on the ball injection slide rail 54, the ball injection slider 55 is mounted on the ball injection screw 57 based on thread engagement, and the output end of the ball injection motor 53 is connected to the ball injection screw 57. The ball injection motor 53 drives the ball injection slider 55 to move up and down along the ball injection slide rail 54 based on the ball injection screw 57, so as to drive the ball injection connecting plate 52 to move up and down, and then drive the ball injection rod 51 to enter the inner cavity of the nut to complete the ball loading process, and after the ball loading is completed, it rises and exits from the inner cavity of the nut.

[0023] The nut clamping structure 6 includes: a nut seat 61 and a rotation drive structure 62; the nut seat 61 is installed on a nut seat mounting plate 63, and the nut seat mounting plate 63 is connected to the main bracket 1. The nut seat 61 is adapted to the shape and size of the nut N1 to be installed. After the nut N1 to be installed and the outer ring are assembled, they are placed on the nut seat 61; the nut seat 61 is arranged on the rotation drive structure 62, and the rotation drive structure 62 drives the nut seat 61 to rotate, thereby driving the nut N1 to be installed to rotate, and realizing the ball loading process of the steel ball lanes at 5 different angles. The rotation drive structure 62 is realized based on any one of the structures for realizing horizontal rotation drive in the prior art. In this embodiment, it is realized based on a high-precision hollow rotating platform module in the prior art.

[0024] In order to realize the steel ball feeding process of the ball injection rod 51, a steel ball buffer structure 4 is provided in the present application. Figure 8 and Fig. 9 As shown, the steel ball cache structure 4 includes: a cache slider 41, a cache rod 42, a horizontal cylinder 43 and a cache slide rail 44.

[0025] The ball injection structure 5 is arranged below the main ball connection plate 52, and the steel ball injection channel 511 of the ball injection structure 5 penetrates the ball injection connection plate 52. The buffer slide rail 44 is horizontally installed on the upper end surface of the ball injection connection plate 52, and the buffer slider 41 is slidably installed on the buffer slide rail 44; two vertical ball channels are respectively opened inside the buffer slider 41 in the direction parallel to the buffer slide rail 44, which are respectively recorded as: the buffer ball channel 411 and the push ball channel 412, and a pull plate 431 is arranged at one end of the buffer slider 41 away from the push ball channel 412, and the output end of the horizontal cylinder 43 is horizontally connected to the pull plate 431; the height of the buffer ball channel 411 is set to the height of a group of steel balls, ensuring that only the number of steel balls of one channel is injected into the ball injection rod each time; the travel of the buffer ball channel 411 and the push ball channel 412 passes through the steel ball entrance of the steel ball injection channel 511 in the ball injection structure 5.

[0026] The cache rod 42 is arranged above the cache slider 41 through the cache rod mounting frame 421. A vertical steel ball feeding channel 422 is opened inside the cache rod 42. The top entrance of the steel ball feeding channel 422 is connected to the steel ball storage structure 2 through a hose, and the bottom outlet is located on the horizontal sliding stroke of the cache ball channel 411.

[0027] like Fig. 9 As shown, the horizontal cylinder 43 drives the cache slide block 41 to slide horizontally along the cache slide rail 44, so that the cache ball channel 411 moves between two positions: below the steel ball loading channel 422 (steel ball loading position) and at the top of the steel ball injection channel 511 (steel ball unloading position), and each time a group of steel balls injected by the steel ball storage structure 2 is loaded into the steel ball injection channel 511. When the ball pushing channel 412 is aligned with the steel ball injection channel 511 in the inner cavity of the ball injection rod 51, the bottom end of the steel ball loading channel 422 is aligned with the entrance of the cache ball channel 411, ensuring that when the ball injection rod 51 pushes the ball, the cache ball channel 411 is loaded for the next steel ball installation, thereby improving the overall efficiency.

[0028] like Figure 2 As shown, because the ball track in the nut N1 to be installed is an arc-shaped ball track, in order to adapt to the curvature of the ball track of the nut, the bottom of the steel ball injection channel 511 is also set as an arc-shaped channel, so a group of steel balls cannot enter the ball track in the nut completely based on their own gravity. In this application, a ball pusher 31 is set to penetrate into the steel ball injection channel 511 to push the steel balls into the ball track in the nut.

[0029] like Figure 6 and Figure 7 As shown, the ball pushing structure 3 includes: a ball pushing cylinder 31, a ball pushing rod 32, a ball pushing slide 33 and a ball pushing slide rail 34; a ball pushing bracket 35 is arranged on the ball injection connecting plate 52, a ball pushing slide rail 34 is vertically arranged on the ball pushing bracket 35, a ball pushing slide 33 is slidably mounted on the ball pushing slide rail 34, a ball pushing cylinder 31 is arranged on the ball pushing bracket 35, and an output end is vertically connected to the ball pushing slide 33 downward; a ball pushing rod 32 is vertically arranged below the ball pushing slide 33, and the ball pushing rod 32 is located directly above the ball pushing rod introduction structure 45. The ball pushing cylinder 31 drives the ball pushing slide 33 to carry the ball pushing rod 32 along the ball pushing slide rail 34 to achieve lifting and lowering motion, and after the ball pushing process and the ball pushing are completed, the ball pushing rod is raised.

[0030] The ball push rod 32 includes: a straight rod portion 321 and a spring rod 322 connected from top to bottom. The spring rod 322 ensures that the curved steel ball injection channel 511 is adapted to push all the steel balls into the ball channel inside the nut. In order to ensure that the ball push rod 32 can accurately enter the steel ball injection channel 511, the present application still refers to a ball push introduction structure 45. Figure 8 and Fig. 9As shown, the ball push rod introduction structure 45 is fixedly installed above the entrance of the ball push channel 412 based on the introduction bracket 451; the introduction bracket 451 is installed on the ball injection connecting plate 52. The ball push rod introduction structure 45 includes a ball rod entrance in the shape of a truncated cone with a wide top and a narrow bottom, ensuring that when the ball push channel 412 is aligned with the steel ball injection channel 511 in the inner cavity of the ball injection rod 51, the ball push rod 32 is introduced into the steel ball injection channel 511.

[0031] In order to ensure that the nut to be installed remains stable when the steel ball is installed, a stabilizing structure is also provided in the present application. The stabilizing structure includes: a nut outer ring clamping cover 65 and a nut end face clamping ring plate 64. The nut outer ring clamping cover 65 is installed on the nut seat 61 based on thread engagement. After the nut N1 and the outer ring N3 are installed, the nut outer ring clamping cover 65 is tightened on the nut seat to clamp the outer ring; the nut end face clamping ring plate 64 is sleeved on the ball injection rod 51, and a protruding ring-mounted step structure is provided on the outer wall of the ball injection rod 51. The buffer spring 65 is movably sleeved on the outer wall of the ball injection rod 51, and the two ends of the buffer spring 65 are respectively connected to the bottom end face of the step structure and the nut end face clamping ring plate 64; the outer diameter of the nut end face clamping ring plate 64 is larger than the inner cavity diameter of the nut N1 seat to be installed.

[0032] In the non-working state, the nut end face pressing ring plate 64 is sleeved on the outer periphery of the ball injection rod 51 due to its own gravity. When the ball injection rod 51 goes deep into the inner cavity of the nut to perform the ball installation process, because the outer diameter of the nut end face pressing ring plate 64 is larger than the inner cavity diameter of the nut N1 seat to be installed, the nut end face pressing ring plate 64 cannot enter the inner cavity of the nut N1, and based on the pressure provided by the buffer carbonization 65, the upper end face of the nut is pressed from above to prevent the nut from shaking during the installation process.

[0033] In order to accurately determine the lifting position of the ball protection rod 71, a ball protection rod lifting limit structure is also provided in the present application. Figure 6 and Figure 7 The ball protection rod lifting and limiting structure includes: a limiting slide groove 715 and a limiting bolt 716; a through groove is provided from top to bottom at a position above the ball protection rod mounting sleeve 721 on the ball protection rod 71, which is recorded as: the limiting slide groove 715; the length of the limiting bolt 716 is greater than the inner diameter of the ball protection rod mounting sleeve 721, and the limiting bolt 716 passes through the ball protection rod mounting sleeve 721 and the limiting slide groove 715 at the same time. When the ball protection rod 71 is lifted up by the support spring 722 and lowered by the pressure of the injection rod 51, the limiting bolt 716 is fixed in the ball protection rod mounting sleeve 721, and the lifting position of the ball protection rod 71 is limited within the height range of the limiting slide groove 715.

[0034] After using the technical solution of the present invention, in the default state, the ball protection rod 71 is installed directly below the nut seat 61, and the ball protection part 711 at the top is inserted into the inner cavity of the nut seat from the bottom. Under the thrust of the support spring 722, the default height position of the ball protection part 711 is just located at the position of the highest ball track and the lowest ball track in the inner cavity of the nut to be installed. When the nut seat is loaded, the nut seat is put in from top to bottom and sleeved on the outer periphery of the ball protection part 711.

[0035] After the nut is loaded, the ball injection motor 53 is started to push the ball pushing structure 3, the steel ball buffer structure 4, and the ball injection structure 5 installed on the ball injection connecting plate 52 downward to the working position. The horizontal cylinder 43 is started to drive the buffer slide block 41 to slide horizontally along the buffer slide rail 44, so that the buffer ball channel 411 moves to the top of the steel ball injection channel 511 in the ball injection rod 51. After the steel balls in the buffer ball channel 411 fall into the steel ball injection channel 511, the horizontal cylinder 43 is reversely started to align the ball pushing channel 412 with the steel ball injection channel 511. The ball pushing cylinder 31 is started to drive the ball pushing rod 32 to descend, enter the steel ball injection channel 511, and insert all the steel balls into the ball channel inside the nut. The ball pushing cylinder 31 is reversely started to drive the ball pushing rod 32 to rise and return to the default position.

[0036] The ball injection motor 53 is started to push the ball pushing structure 3, the steel ball buffer structure 4 and the ball injection structure 5 downward to the working position of the next group of steel balls; the rotary drive structure 62 drives the nut seat 61 to rotate an angle with the nut to be installed, and turns the entrance of the next group of steel balls in the inner cavity of the nut seat to the exit position of the steel ball injection channel 511, and continues to install the next group of steel balls according to the procedure of the first group of steel balls.

[0037] When the ball injection rod 51 is driven by the lifting drive structure and gradually descends into the inner cavity of the nut to be installed, the ball protection rod 71 is pressed down to install the steel balls; after each set of steel balls is installed, the rotary drive structure 62 drives the nut seat 61 to rotate the nut to be installed by an angle to reach the installation angle of the next set of steel balls; until all five sets of steel balls are installed. The ball injection motor 53 is then reversed to lift the ball injection rod 51 out of the nut cavity, and the ball protection rod 71 is raised synchronously with the ball injection rod 51 to ensure that the steel balls will not fall after the ball injection rod 51 is raised. When the ball injection rod 51 is completely withdrawn, the main ball motor brings the ball pushing structure 3, the steel ball buffer structure 4, and the ball injection structure 5 back to their initial positions. Insert the screw rod connection block 714 into the top of the ball protection part, and then insert the screw rod N2 to be installed into the top of the screw rod connection block 714, press the top of the screw rod N2 to be installed manually or by equipment, start the rotary drive structure 62 to rotate with the nut to be installed, and the screw rod N2 to be installed is gradually installed into the inner cavity of the nut N1 to be installed based on the thread engagement until the screw rod N2 to be installed completely covers all the steel ball channels in the inner cavity of the nut, and ensure that the steel ball will not fall during the installation of the screw rod N2 through the cooperation between the screw rod N2 to be installed and the ball protection rod 71. Then manually remove the assembled ball screw pair from the nut seat 61. Because the ball protection part 711 and the sliding part 712 on the ball protection rod are in a movable plug-in relationship, when the product is taken out, there are still the ball protection part 711 and the screw rod connection block 714 in the inner cavity of the nut seat. After manually taking out the two ball rod protection parts, completely rotate the screw rod N2 and install it into the inner cavity of the nut N1, and the steel ball assembly process of the ball screw pair N is completed.

Claims

1. A semi-automatic ball loading machine, comprising: Ball injection structure and ball protection structure; Features: The ball injection structure is arranged above the ball protection structure; when installing the steel ball, the steel ball channel in the inner cavity of the nut is installed from top to bottom, and the installed steel ball is protected based on the ball injection structure during the installation process. When the ball injection structure is withdrawn after the installation is completed, the installed steel ball is protected by the ball protection structure; The ball protection structure comprises: a ball protection rod and a ball protection rod mounting structure; The ball protection rod comprises: a ball protection part, a sliding part, a mounting part and a connecting block; The ball protection part is cylindrical, and its diameter is adapted to the diameter of the inner cavity of the nut to be installed, and its length is adapted to the distance between the highest ball track and the lowest ball track in the inner cavity of the nut to be installed; the radius of the sliding part is adapted to the difference between the radius of the inner cavity of the nut to be installed and the first stop block; the cross-sectional size of the connecting block is adapted to the shape and size of the first stop block at the bottom of the nut to be installed; The ball protection part, the sliding part and the mounting part are arranged concentrically from top to bottom; the bottom of the sliding part and the top of the mounting part are fixedly connected, the bottom end of the connecting block is connected to the mounting part, the top extends upward and is slidably inserted into the ball protection part from bottom to top; the side wall of the bottom end of the ball protection part is provided with an insertion groove from bottom to top that is adapted to the shape and size of the top end of the connecting block; The ball protection rod installation structure comprises: a ball protection rod installation sleeve and a support spring; The ball protection rod installation sleeve is opened upward, and the support spring is arranged at the bottom of the inner cavity of the ball protection rod sleeve; the ball protection rod is movably inserted into the ball protection rod installation sleeve from top to bottom; and the bottom end of the ball protection rod is pressed against the top end of the support spring.

2. A semi-automatic ball loading machine according to claim 1, characterized in that: It also includes: a screw rod connecting block; The screw rod connecting block includes: a ring-shaped block; a second stop block plug-in interface is arranged on the block, and the size of the second stop block plug-in interface is larger than the size of the first stop block; the top end surface and the bottom end surface of the block are respectively provided with: a ball protection part plug-in block and a screw rod plug-in block; the shape and size of the screw rod plug-in block are adapted to the positioning hole at the bottom of the screw rod to be installed; the top end of the ball protection part is provided with an insertion hole adapted to the ball protection part plug-in block.

3. A semi-automatic ball loading machine according to claim 1, characterized in that: The ball injection structure comprises: a lifting drive structure, a ball injection connecting plate and a ball injection rod; The ball injection connecting plate is arranged on the lifting and driving structure; the ball injection rod is installed on the ball injection connecting plate; a steel ball injection channel is provided in the inner cavity of the ball injection rod, and a steel ball inlet at the top of the steel ball injection channel is connected to a steel ball buffer structure; an arc-shaped steel ball introduction channel is provided from top to bottom at the lower part of the steel ball injection channel.

4. A semi-automatic ball loading machine according to claim 3, characterized in that: The lifting drive structure comprises: a ball injection motor, a ball injection slide rail, and a ball injection slider; The ball injection slide rail is vertically mounted on the ball injection support frame, the ball injection slider is slidably mounted on the ball injection slide rail, and the ball injection motor drives the ball injection slider to move up and down along the ball injection slide rail based on the ball injection screw.

5. A semi-automatic ball loading machine according to claim 3, characterized in that: The steel ball buffer structure comprises: a buffer slide block, a buffer rod, a horizontal cylinder and a buffer slide rail; The buffer slide rail is horizontally mounted on the upper end surface of the ball injection connection plate, and the buffer slider is slidably mounted on the buffer slide rail; Two vertical ball paths are respectively provided inside the cache slider in a direction parallel to the cache slide rail, which are respectively referred to as a cache ball path and a ball push path. The output end of the horizontal cylinder is horizontally connected to an end of the cache slider away from the ball push path. The height of the cache ball path is set to the height of a group of steel balls. The travel of the cache ball path and the ball push path both passes through the steel ball entrance of the ball injection structure. The cache rod is arranged above the cache slider through a cache rod mounting frame. A vertical steel ball feeding channel is opened inside the cache rod. The top entrance of the steel ball feeding channel is connected to the steel ball storage structure, and the bottom exit is located on the horizontal sliding stroke of the cache ball channel.

6. A semi-automatic ball loading machine according to claim 5, characterized in that: The steel ball cache structure also includes: a ball pushing rod introduction structure, which is fixedly installed above the entrance of the ball pushing lane based on an introduction bracket; the ball pushing rod introduction structure includes a ball rod entrance in the shape of a truncated cone that is wide at the top and narrow at the bottom; the introduction bracket is installed on the ball injection connecting plate.

7. A semi-automatic ball loading machine according to claim 1, characterized in that: It also includes: a ball pushing structure; The ball pushing structure comprises: a ball pushing cylinder, a ball pushing rod, a ball pushing slide plate and a ball pushing slide rail; The ball-pushing slide rail is vertically arranged on the ball-pushing bracket, and the ball-pushing slide plate is slidably mounted on the ball-pushing slide rail; the ball-pushing cylinder is arranged on the ball-pushing bracket, and the cylinder output end is vertically downwardly connected to the ball-pushing slide plate; the ball-pushing rod is vertically downwardly arranged below the ball-pushing slide plate; The golf club comprises a straight rod portion and a spring rod which are connected together from top to bottom.

8. A semi-automatic ball loading machine according to claim 3, characterized in that: It also includes: a nut clamping structure; The nut clamping structure comprises: a nut seat and a rotation driving structure; The nut seat is adapted to the shape and size of the nut to be installed, and after the nut to be installed and the outer ring are assembled, they are placed on the nut seat; the nut seat is arranged on a rotary drive structure, and the rotary drive structure drives the nut seat to rotate.

9. A semi-automatic ball loading machine according to claim 8, characterized in that: It also includes: stabilizing the structure; The stable structure comprises: a nut outer ring pressing cover and a nut end face pressing ring plate; The nut outer ring clamping cover is installed on the nut seat based on threaded engagement; the nut end face clamping ring plate is sleeved on the ball injection rod, a protruding ring-mounted step structure is provided on the outer wall of the ball injection rod, and a buffer spring is sleeved on the outer wall of the ball injection rod, with two ends respectively connected to the bottom end face of the step structure and the nut end face clamping ring plate; the outer diameter of the nut end face clamping ring plate is larger than the inner cavity diameter of the nut seat to be installed.

10. The semi-automatic ball loading machine according to claim 1, characterized in that: The stabilizing structure also includes: a ball protection rod lifting and limiting structure; The ball protection rod lifting and limiting structure includes: a limiting slide groove and a limiting bolt; a through groove is opened from top to bottom on the ball protection rod above the ball protection rod mounting sleeve, which is recorded as: the limiting slide groove; the length of the limiting bolt is greater than the inner cavity diameter of the ball protection rod mounting sleeve, and it penetrates the ball protection rod mounting sleeve and the limiting slide groove horizontally at the same time.

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